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authorMattias Andrée <maandree@kth.se>2021-02-20 23:20:05 +0100
committerMattias Andrée <maandree@kth.se>2021-02-20 23:20:11 +0100
commit91ce2e7e5c8c7659237b89b8c4a072b1c46b1fca (patch)
treeae87077ad8d6aaa4cbb064f092fe3b380b9852d6
parentupdate dist (diff)
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misc + change license + remove info manual1.3.2
Signed-off-by: Mattias Andrée <maandree@kth.se>
-rw-r--r--.gitignore14
-rw-r--r--COPYING15
-rw-r--r--DEPENDENCIES1
-rw-r--r--LICENSE683
-rw-r--r--Makefile190
-rw-r--r--README1
-rw-r--r--calibrator.c655
-rw-r--r--common.h393
-rw-r--r--config.mk6
-rw-r--r--crt-calibrator.1 (renamed from doc/man/crt-calibrator.1)0
-rw-r--r--dist/archlinux/stable/.gitignore9
-rw-r--r--dist/archlinux/stable/PKGBUILD25
-rw-r--r--dist/archlinux/stable/crt-calibrator.install20
-rw-r--r--doc/info/crt-calibrator.texinfo90
-rw-r--r--doc/info/fdl.texinfo505
-rw-r--r--drmgamma.c262
-rw-r--r--framebuffer.c183
-rw-r--r--gamma.c57
-rw-r--r--src/calibrator.c733
-rw-r--r--src/calibrator.h108
-rw-r--r--src/drmgamma.c283
-rw-r--r--src/drmgamma.h182
-rw-r--r--src/framebuffer.c215
-rw-r--r--src/framebuffer.h154
-rw-r--r--src/gamma.c79
-rw-r--r--src/gamma.h52
-rw-r--r--src/state.c172
-rw-r--r--src/state.h89
-rw-r--r--state.c144
29 files changed, 1742 insertions, 3578 deletions
diff --git a/.gitignore b/.gitignore
index edbdcdd..1123c3e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,15 +1,5 @@
-_/
-bin/
-obj/
-.*
-!.git*
+*\#*
*~
-\#*\#
-*.bak
-*.swp
-*.swo
*.o
*.su
-*.out
-*.gch
-
+/crt-calibrator
diff --git a/COPYING b/COPYING
deleted file mode 100644
index a8fc716..0000000
--- a/COPYING
+++ /dev/null
@@ -1,15 +0,0 @@
-crt-calibrator – Calibration utility for CRT monitors
-Copyright © 2014, 2015 Mattias Andrée (maandree@member.fsf.org)
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
diff --git a/DEPENDENCIES b/DEPENDENCIES
index 294d82d..07f8c1c 100644
--- a/DEPENDENCIES
+++ b/DEPENDENCIES
@@ -12,7 +12,6 @@ BUILD DEPENDENCIES:
linux
gcc
make
- texinfo (opt-put: for info, pdf, dvi and ps manuals)
INSTALL DEPENDENCIES:
diff --git a/LICENSE b/LICENSE
index 94a9ed0..d501217 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,674 +1,15 @@
- GNU GENERAL PUBLIC LICENSE
- Version 3, 29 June 2007
+ISC License
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
+© 2014, 2015, 2021 Mattias Andrée <maandree@kth.se>
- Preamble
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
- The GNU General Public License is a free, copyleft license for
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- 12. No Surrender of Others' Freedom.
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- If conditions are imposed on you (whether by court order, agreement or
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- 13. Use with the GNU Affero General Public License.
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- 14. Revised Versions of this License.
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- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
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- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- under certain conditions; type `show c' for details.
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-might be different; for a GUI interface, you would use an "about box".
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-if any, to sign a "copyright disclaimer" for the program, if necessary.
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-<http://www.gnu.org/licenses/>.
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-into proprietary programs. If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library. If this is what you want to do, use the GNU Lesser General
-Public License instead of this License. But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/Makefile b/Makefile
index a700ebf..0dc11a2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,174 +1,40 @@
-PREFIX = /usr
-BIN = /bin
-DATA = /share
-BINDIR = $(PREFIX)$(BIN)
-DATADIR = $(PREFIX)$(DATA)
-DOCDIR = $(DATADIR)/doc
-INFODIR = $(DATADIR)/info
-MANDIR = $(DATADIR)/man
-MAN1DIR = $(MANDIR)/man1
-LICENSES = $(DATADIR)/licenses
+.POSIX:
-COMMAND = crt-calibrator
-PKGNAME = crt-calibrator
+CONFIGFILE = config.mk
+include $(CONFIGFILE)
+OBJ =\
+ calibrator.o\
+ drmgamma.o\
+ framebuffer.o\
+ gamma.o\
+ state.o
-LIBS = libdrm
+HDR = common.h
-FLAGS = -std=gnu99 -Og -g -Wall -Wextra -pedantic -Wdouble-promotion -Wformat=2 \
- -Winit-self -Wmissing-include-dirs -Wtrampolines -Wfloat-equal -Wshadow \
- -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls \
- -Wnested-externs -Winline -Wno-variadic-macros -Wswitch-default \
- -Wsync-nand -Wunsafe-loop-optimizations -Wcast-align -Wstrict-overflow \
- -Wdeclaration-after-statement -Wundef -Wbad-function-cast -Wcast-qual \
- -Wwrite-strings -Wlogical-op -Waggregate-return -Wstrict-prototypes \
- -Wold-style-definition -Wpacked -Wvector-operation-performance \
- -Wunsuffixed-float-constants -Wsuggest-attribute=const \
- -Wsuggest-attribute=noreturn -Wsuggest-attribute=pure \
- -Wsuggest-attribute=format -Wnormalized=nfkc -Wconversion \
- -fstrict-aliasing -fstrict-overflow -fipa-pure-const -ftree-vrp \
- -fstack-usage -funsafe-loop-optimizations -Wtraditional-conversion
+all: crt-calibrator
+$(OBJ): $(@:.o=.c) $(HDR)
-LD_FLAGS = -lm $(shell pkg-config --libs $(LIBS)) $(FLAGS) $(LDFLAGS)
-C_FLAGS = $(shell pkg-config --cflags $(LIBS)) $(FLAGS) $(CFLAGS) $(CPPFLAGS)
+crt-calibrator: $(OBJ)
+ $(CC) -o $@ $(OBJ) $(LDFLAGS)
-OBJS = calibrator drmgamma framebuffer gamma state
+.c.o:
+ $(CC) -c -o $@ $< $(CFLAGS) $(CPPFLAGS)
+install: crt-calibrator
+ mkdir -p -- "$(DESTDIR)$(PREFIX)/bin"
+ mkdir -p -- "$(DESTDIR)$(MANPREFIX)/man1"
+ cp -- crt-calibrator "$(DESTDIR)$(PREFIX)/bin/"
+ cp -- crt-calibrator.1 "$(DESTDIR)$(MANPREFIX)/man1/"
-
-.PHONY: default
-default: base info
-
-.PHONY: all
-all: base doc
-
-.PHONY: base
-base: cmd
-
-
-.PHONY: cmd
-cmd: bin/crt-calibrator
-
-bin/crt-calibrator: $(foreach O,$(OBJS),obj/$(O).o)
- @mkdir -p bin
- $(CC) $(LD_FLAGS) -o $@ $^
-
-obj/%.o: src/%.c src/*.h
- @mkdir -p obj
- $(CC) $(C_FLAGS) -c -o $@ $<
-
-
-.PHONY: doc
-doc: info pdf dvi ps
-
-.PHONY: info
-info: bin/crt-calibrator.info
-bin/%.info: doc/info/%.texinfo
- @mkdir -p bin
- $(MAKEINFO) $<
- mv $*.info $@
-
-.PHONY: pdf
-pdf: bin/crt-calibrator.pdf
-bin/%.pdf: doc/info/%.texinfo
- @! test -d obj/pdf || rm -rf obj/pdf
- @mkdir -p bin obj/pdf
- cd obj/pdf && texi2pdf ../../"$<" < /dev/null
- mv obj/pdf/$*.pdf $@
-
-.PHONY: dvi
-dvi: bin/crt-calibrator.dvi
-bin/%.dvi: doc/info/%.texinfo
- @! test -d obj/dvi || rm -rf obj/dvi
- @mkdir -p bin obj/dvi
- cd obj/dvi && $(TEXI2DVI) ../../"$<" < /dev/null
- mv obj/dvi/$*.dvi $@
-
-.PHONY: ps
-ps: bin/crt-calibrator.ps
-bin/%.ps: doc/info/%.texinfo
- @! test -d obj/ps || rm -rf obj/ps
- @mkdir -p bin obj/ps
- cd obj/ps && texi2pdf --ps ../../"$<" < /dev/null
- mv obj/ps/$*.ps $@
-
-
-
-.PHONY: install
-install: install-base install-info install-man
-
-.PHONY: install-all
-install-all: install-base install-doc
-
-.PHONY: install-base
-install-base: install-cmd install-copyright
-
-
-.PHONY: install-cmd
-install-cmd: bin/crt-calibrator
- install -dm755 -- "$(DESTDIR)$(BINDIR)"
- install -m755 $< -- "$(DESTDIR)$(BINDIR)/$(COMMAND)"
-
-
-.PHONY: install-copyright
-install-copyright: install-copying install-license
-
-.PHONY: install-copying
-install-copying:
- install -dm755 -- "$(DESTDIR)$(LICENSES)/$(PKGNAME)"
- install -m644 COPYING -- "$(DESTDIR)$(LICENSES)/$(PKGNAME)"
-
-.PHONY: install-license
-install-license:
- install -dm755 -- "$(DESTDIR)$(LICENSES)/$(PKGNAME)"
- install -m644 LICENSE -- "$(DESTDIR)$(LICENSES)/$(PKGNAME)"
-
-
-.PHONY: install-doc
-install-doc: install-info install-pdf install-dvi install-ps install-man
-
-.PHONY: install-info
-install-info: bin/crt-calibrator.info
- install -dm755 -- "$(DESTDIR)$(INFODIR)"
- install -m644 $< -- "$(DESTDIR)$(INFODIR)/$(PKGNAME).info"
-
-.PHONY: install-pdf
-install-pdf: bin/crt-calibrator.pdf
- install -dm755 -- "$(DESTDIR)$(DOCDIR)"
- install -m644 $< -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).pdf"
-
-.PHONY: install-dvi
-install-dvi: bin/crt-calibrator.dvi
- install -dm755 -- "$(DESTDIR)$(DOCDIR)"
- install -m644 $< -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).dvi"
-
-.PHONY: install-ps
-install-ps: bin/crt-calibrator.ps
- install -dm755 -- "$(DESTDIR)$(DOCDIR)"
- install -m644 $< -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).ps"
-
-.PHONY: install-man
-install-man: doc/man/crt-calibrator.1
- install -dm755 -- "$(DESTDIR)$(MAN1DIR)"
- install -m644 $< -- "$(DESTDIR)$(MAN1DIR)/$(COMMAND).1"
-
-
-
-.PHONY: uninstall
uninstall:
- -rm -- "$(DESTDIR)$(BINDIR)/$(COMMAND)"
- -rm -- "$(DESTDIR)$(LICENSES)/$(PKGNAME)/COPYING"
- -rm -- "$(DESTDIR)$(LICENSES)/$(PKGNAME)/LICENSE"
- -rmdir -- "$(DESTDIR)$(LICENSES)/$(PKGNAME)"
- -rm -- "$(DESTDIR)$(INFODIR)/$(PKGNAME).info"
- -rm -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).pdf"
- -rm -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).dvi"
- -rm -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).ps"
- -rm -- "$(DESTDIR)$(MAN1DIR)/$(COMMAND).1"
-
+ -rm -- "$(DESTDIR)$(BINDIR)/crt-calibrator"
+ -rm -- "$(DESTDIR)$(MAN1DIR)/crt-calibrator.1"
-
-.PHONY: clean
clean:
- -rm -r bin obj
+ -rm -rf -- crt-calibrator *.o
+
+.SUFFIXES:
+.SUFFIXES: .o .c
+.PHONY: all install uninstall clean
diff --git a/README b/README
index 7a75efd..4a7372b 100644
--- a/README
+++ b/README
@@ -37,4 +37,3 @@ RATIONALE
SEE ALSO
analyse-gamma(1), blueshift(1)
-
diff --git a/calibrator.c b/calibrator.c
new file mode 100644
index 0000000..9456f96
--- /dev/null
+++ b/calibrator.c
@@ -0,0 +1,655 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * Draw bars in different shades of grey, red, green and blue
+ * used for calibrating the contrast and brightness
+ */
+static void
+draw_contrast_brightness(void)
+{
+ const int CONTRAST_BRIGHTNESS_LEVELS[21] = {
+ 0, 17, 27, 38, 48, 59, 70, 82, 94, 106, 119, 131,
+ 144, 158, 171, 185, 198, 212, 226, 241, 255
+ };
+ size_t f;
+ uint32_t y, x, colour;
+ framebuffer_t *restrict fb;
+ int v;
+
+ for (f = 0; f < framebuffer_count; f++) {
+ fb = &framebuffers[f];
+ for (y = 0; y < 4; y++) {
+ for (x = 0; x < 21; x++) {
+ v = CONTRAST_BRIGHTNESS_LEVELS[x];
+ colour = fb_colour(v * ((y == 1) | (y == 0)),
+ v * ((y == 2) | (y == 0)),
+ v * ((y == 3) | (y == 0)));
+ fb_fill_rectangle(fb, colour, x * fb->width / 21, y * fb->height / 4,
+ (x + 1) * fb->width / 21 - x * fb->width / 21,
+ (y + 1) * fb->height / 4 - y * fb->height / 4);
+ }
+ }
+ }
+}
+
+
+/**
+ * Draw a seven segment display
+ *
+ * @param fb The framebuffer to draw on
+ * @param colour The intensity of the least intense colour to use
+ * @param x The X component of the top left corner of the seven segment display
+ * @param y The Y component of the top left corner of the seven segment display
+ */
+static void
+draw_digit(framebuffer_t *restrict fb, int colour, uint32_t x, uint32_t y)
+{
+ uint32_t c;
+
+ c = fb_colour(colour + 0, colour + 0, colour + 0);
+ fb_fill_rectangle(fb, c, x + 20, y, 80, 20);
+
+ c = fb_colour(colour + 1, colour + 1, colour + 1);
+ fb_fill_rectangle(fb, c, x, y + 20, 20, 80);
+
+ c = fb_colour(colour + 2, colour + 2, colour + 2);
+ fb_fill_rectangle(fb, c, x + 100, y + 20, 20, 80);
+
+ c = fb_colour(colour + 3, colour + 3, colour + 3);
+ fb_fill_rectangle(fb, c, x + 20, y + 100, 80, 20);
+
+ c = fb_colour(colour + 4, colour + 4, colour + 4);
+ fb_fill_rectangle(fb, c, x, y + 120, 20, 80);
+
+ c = fb_colour(colour + 5, colour + 5, colour + 5);
+ fb_fill_rectangle(fb, c, x + 100, y + 120, 20, 80);
+
+ c = fb_colour(colour + 6, colour + 6, colour + 6);
+ fb_fill_rectangle(fb, c, x + 20, y + 200, 80, 20);
+}
+
+
+/**
+ * Manipulate a CRT controllers gamma ramps to display a specific digit
+ * for one of the seven segment display on only that CRT controller's
+ * monitors
+ *
+ * @param crtc The CRT controller information
+ * @param colour The intensity of the least intense colour in the seven segment display
+ * @param value The valud of the digit to display
+ */
+static void
+gamma_digit(drm_crtc_t *restrict crtc, int colour, size_t value)
+{
+#define __ 0
+ const int DIGITS[11] = { 1 | 2 | 4 | __ | 16 | 32 | 64, /* (0) */
+ __ | __ | 4 | __ | __ | 32 | __, /* (1) */
+ 1 | __ | 4 | 8 | 16 | __ | 64, /* (2) */
+ 1 | __ | 4 | 8 | __ | 32 | 64, /* (3) */
+ __ | 2 | 4 | 8 | __ | 32 | __, /* (4) */
+ 1 | 2 | __ | 8 | __ | 32 | 64, /* (5) */
+ 1 | 2 | __ | 8 | 16 | 32 | 64, /* (6) */
+ 1 | __ | 4 | __ | __ | 32 | __, /* (7) */
+ 1 | 2 | 4 | 8 | 16 | 32 | 64, /* (8) */
+ 1 | 2 | 4 | 8 | __ | 32 | 64, /* (9) */
+ __ | __ | __ | __ | __ | __ | __}; /* not visible */
+#undef __
+ int i, j, digit = DIGITS[value];
+ uint16_t c;
+
+ for (i = 0; i < 7; i++) {
+ c = (digit & (1 << i)) ? 0xFFFF : 0;
+ j = i + colour;
+ crtc->red[j] = crtc->green[j] = crtc->blue[j] = c;
+ }
+}
+
+
+/**
+ * Draw an unique index on each monitor
+ *
+ * @return Zero on success, -1 on error
+ */
+static int
+draw_id(void)
+{
+ size_t f, c, id = 0;
+ framebuffer_t *restrict fb;
+ drm_crtc_t *restrict crtc;
+ for (f = 0; f < framebuffer_count; f++) {
+ fb = &framebuffers[f];
+ fb_fill_rectangle(fb, fb_colour(0, 0, 0), 0, 0, fb->width, fb->height);
+ draw_digit(fb, 1, 40, 40);
+ draw_digit(fb, 8, 180, 40);
+ }
+ for (c = 0; c < crtc_count; c++) {
+ crtc = &crtcs[c];
+ if (drm_get_gamma(crtc) < 0)
+ return -1;
+ gamma_digit(crtc, 1, id < 10 ? 10 : (id / 10) % 10);
+ gamma_digit(crtc, 8, (id / 1) % 10);
+ id++;
+ if (drm_set_gamma(crtc) < 0)
+ return -1;
+ }
+ return 0;
+}
+
+
+/**
+ * Draw squares used as reference when tweeking the gamma correction
+ */
+static void
+draw_gamma(void)
+{
+ size_t f;
+ uint32_t x, y, background, average, high, low, xoff;
+ framebuffer_t *restrict fb;
+ int r, g, b;
+ for (f = 0; f < framebuffer_count; f++) {
+ fb = framebuffers + f;
+ for (x = 0; x < 4; x++) {
+ r = (x == 1) || (x == 0);
+ g = (x == 2) || (x == 0);
+ b = (x == 3) || (x == 0);
+ background = fb_colour(128 * r, 128 * g, 128 * b);
+ average = fb_colour(188 * r, 188 * g, 188 * b);
+ high = fb_colour(255 * r, 255 * g, 255 * b);
+ low = fb_colour(0, 0, 0);
+ xoff = x * fb->width / 4;
+ fb_fill_rectangle(fb, background, xoff, 0, fb->width / 4, fb->height);
+ xoff += (fb->width / 4 - 200) / 2;
+ fb_fill_rectangle(fb, high, xoff, 40, 200, 200);
+ fb_fill_rectangle(fb, average, xoff + 50, 40, 100, 200);
+ fb_fill_rectangle(fb, average, xoff, 280, 200, 200);
+ for (y = 0; y < 200; y += 2) {
+ fb_draw_horizontal_line(fb, high, xoff + 50, 280 + y + 0, 100);
+ fb_draw_horizontal_line(fb, low , xoff + 50, 280 + y + 1, 100);
+ }
+ fb_fill_rectangle(fb, average, xoff, 520, 200, 200);
+ fb_fill_rectangle(fb, high, xoff + 50, 520, 100, 200);
+ }
+ }
+}
+
+
+/**
+ * Print a pattern on the screen that can be used when
+ * calibrating the convergence
+ */
+static void
+draw_convergence(void)
+{
+ uint32_t black = fb_colour(0, 0, 0);
+ uint32_t white = fb_colour(255, 255, 255);
+ uint32_t x, y;
+ size_t f;
+ framebuffer_t *restrict fb;
+ for (f = 0; f < framebuffer_count; f++) {
+ fb = framebuffers + f;
+ fb_fill_rectangle(fb, black, 0, 0, fb->width, fb->height);
+ for (y = 0; y <= fb->height; y += 16) {
+ if (y == fb->height)
+ y = fb->height - 1;
+ for (x = 0; x <= fb->width; x += 16) {
+ if (x == fb->height)
+ x = fb->height - 1;
+ fb_draw_pixel(fb, white, x, y);
+ }
+ }
+ }
+}
+
+
+/**
+ * Print a pattern on the screen that can be used when
+ * calibrating the moiré cancellation
+ *
+ * @param gap The horizontal and vertical gap, in pixels, between the dots
+ * @param diagonal Whether to draw dots in a diagonal pattern
+ */
+static void
+draw_moire(uint32_t gap, int diagonal)
+{
+ uint32_t black = fb_colour(0, 0, 0);
+ uint32_t white = fb_colour(255, 255, 255);
+ uint32_t x, y, gap2 = gap << 1;
+ size_t f;
+ framebuffer_t *restrict fb;
+ gap += (uint32_t)!diagonal;
+ if (diagonal) {
+ for (f = 0; f < framebuffer_count; f++) {
+ fb = framebuffers + f;
+ fb_fill_rectangle(fb, black, 0, 0, fb->width, fb->height);
+ for (y = 0; y < fb->height; y += gap)
+ for (x = (y % gap2); x < fb->width; x += gap2)
+ fb_draw_pixel(fb, white, x, y);
+ }
+ } else {
+ for (f = 0; f < framebuffer_count; f++) {
+ fb = framebuffers + f;
+ fb_fill_rectangle(fb, black, 0, 0, fb->width, fb->height);
+ for (y = 0; y < fb->height; y += gap)
+ for (x = 0; x < fb->width; x += gap)
+ fb_draw_pixel(fb, white, x, y);
+ }
+ }
+}
+
+
+/**
+ * Analyse the monitors calibrations
+ *
+ * @return Zero on success, -1 on error
+ */
+static int
+read_calibs(void)
+{
+ size_t c;
+ for (c = 0; c < crtc_count; c++) {
+ if (drm_get_gamma(&crtcs[c]) < 0)
+ return -1;
+ gamma_analyse(crtcs[c].gamma_stops, crtcs[c].red, &gammas[0][c], &contrasts[0][c], &brightnesses[0][c]);
+ gamma_analyse(crtcs[c].gamma_stops, crtcs[c].green, &gammas[1][c], &contrasts[1][c], &brightnesses[1][c]);
+ gamma_analyse(crtcs[c].gamma_stops, crtcs[c].blue, &gammas[2][c], &contrasts[2][c], &brightnesses[2][c]);
+ }
+ return 0;
+}
+
+
+/**
+ * Apply the selected calibrations to the monitors
+ *
+ * @return Zero on success, -1 on error
+ */
+static int
+apply_calibs(void)
+{
+ size_t c;
+ for (c = 0; c < crtc_count; c++) {
+ gamma_generate(crtcs[c].gamma_stops, crtcs[c].red, gammas[0][c], contrasts[0][c], brightnesses[0][c]);
+ gamma_generate(crtcs[c].gamma_stops, crtcs[c].green, gammas[1][c], contrasts[1][c], brightnesses[1][c]);
+ gamma_generate(crtcs[c].gamma_stops, crtcs[c].blue, gammas[2][c], contrasts[2][c], brightnesses[2][c]);
+ if (drm_set_gamma(&crtcs[c]) < 0)
+ return -1;
+ }
+ return 0;
+}
+
+
+/**
+ * Print calibrations into a file
+ *
+ * @param fp The file
+ * @return Zero on success, -1 on error
+ */
+static int
+save_calibs(FILE *fp)
+{
+ size_t c;
+ for (c = 0; c < crtc_count; c++) {
+ if (fprintf(fp, "# index = %lu\n", c) < 0)
+ return -1;
+ if (fprintf(fp, "edid = %s\n", crtcs[c].edid) < 0)
+ return -1;
+ if (fprintf(fp, "brightness = %f:%f:%f\n", brightnesses[0][c], brightnesses[1][c], brightnesses[2][c]) < 0)
+ return -1;
+ if (fprintf(fp, "contrast = %f:%f:%f\n", contrasts[0][c], contrasts[1][c], contrasts[2][c]) < 0)
+ return -1;
+ if (fprintf(fp, "gamma = %f:%f:%f\n\n", gammas[0][c], gammas[1][c], gammas[2][c]) < 0)
+ return -1;
+ }
+ return 0;
+}
+
+
+int
+main(int argc, char *argv[])
+{
+ FILE *output_file = stdout;
+ int tty_configured = 0, rc = 0, in_fork = 0, status;
+ int c, b, d, at_contrast, red, green, blue;
+ struct termios stty, saved_stty;
+ uint32_t gap;
+ size_t mon;
+ pid_t pid;
+
+ if (argc > 1 && argv[1][0] == '-') {
+ if (argv[1][1] == '-' && !argv[1][2]) {
+ argv[1] = argv[2];
+ argc -= 1;
+ } else {
+ printf("usage: %s [output-file]\n", *argv);
+ return 1;
+ }
+ }
+ if (argc > 2) {
+ printf("usage: %s [output-file]\n", *argv);
+ return 0;
+ }
+
+ if ((acquire_video() < 0) ||
+ (tcgetattr(STDIN_FILENO, &saved_stty) < 0) ||
+ (tcgetattr(STDIN_FILENO, &stty) < 0))
+ goto fail;
+
+ stty.c_lflag &= (tcflag_t)~(ICANON | ECHO);
+ if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &stty) < 0)
+ goto fail;
+ tty_configured = 1;
+
+ printf("\033[?25l");
+ fflush(stdout);
+
+ pid = fork();
+ if (pid > 0) {
+ while (waitpid(pid, &status, 0) < 0)
+ if (errno != EINTR)
+ perror(*argv);
+ rc = !!status;
+ goto done;
+ } else if (!pid) {
+ in_fork = 1;
+ }
+
+ printf("\033[H\033[2J");
+ printf("Please deactivate any program that dynamically\n");
+ printf("applies filters to your monitors' colours\n");
+ printf("and remove any existing filters.\n");
+ printf("In doubt, you probably do not have any.\n");
+ printf("Do not try to calibrate CRT monitors will\n");
+ printf("they are cold.\n");
+ printf("\n");
+ printf("You will be presented with an image on each\n");
+ printf("monitor. Please use the control panel on your\n");
+ printf("to calibrate the contrast and brightness of\n");
+ printf("each monitor. The contrasts adjusts the\n");
+ printf("brightness of bright colours, and the\n");
+ printf("brightness adjusts the brightness of dim\n");
+ printf("colours. All rectangles are of equals size\n");
+ printf("and they should be distrint from eachother.\n");
+ printf("There should only be a slight difference\n");
+ printf("between the two darkest colours for each\n");
+ printf("colour. The grey colour does not need to\n");
+ printf("be perfectly grey but should be close.\n");
+ printf("The brightness should be as high as\n");
+ printf("possible without the first square being\n");
+ printf("any other colour than black or the two first\n");
+ printf("square being too distinct from eachother. The\n");
+ printf("contrast should be as high as possible without\n");
+ printf("causing distortion.\n");
+ printf("\n");
+ printf("Press ENTER to continue, and ENTER again when\n");
+ printf("your are done.\n");
+ fflush(stdout);
+
+ while (getchar() != '\n');
+
+ printf("\033[H\033[2J");
+ fflush(stdout);
+ draw_contrast_brightness();
+
+ while (getchar() != '\n');
+
+ printf("\033[H\033[2J");
+ printf("An index will be displayed on each monitor.\n");
+ printf("It behoves you to memorise them. They will\n");
+ printf("be used in the output when descibing the\n");
+ printf("calibrations, and is the index of the monitors\n");
+ printf("that are used when changing monitor to\n");
+ printf("calibrate.\n");
+ printf("\n");
+ printf("Press ENTER to continue, and ENTER again when\n");
+ printf("your are done.\n");
+ fflush(stdout);
+
+ while (getchar() != '\n');
+
+ printf("\033[H\033[2J");
+ fflush(stdout);
+ if (read_calibs() || draw_id())
+ goto fail;
+
+ while (getchar() != '\n');
+
+ if (apply_calibs())
+ goto fail;
+
+ printf("\033[H\033[2J");
+ printf("You will not be given the opportunity to.\n");
+ printf("calibrate your monitors' brightness and\n");
+ printf("contrast using software incase your monitors\n");
+ printf("could not be sufficiently calibrated using\n");
+ printf("hardware.\n");
+ printf("\n");
+ printf("<Left> and <right> is used to change which\n");
+ printf("monitor to calibrate. <Left> switches to the\n");
+ printf("previous monitor (one lower in index) and\n");
+ printf("<right> switches to the next monitor (one\n");
+ printf("higher in index.)\n");
+ printf("<Up> and <down> is used to increase and\n");
+ printf("descrease the settings. respectively.\n");
+ printf("<Shift+b> is used to switch to changing the.\n");
+ printf("monitor's brightness and <shift+c> switches\n");
+ printf("to contrast.\n");
+ printf("<r> is used to switch to changing the red.\n");
+ printf("channel, <g> switches to the green channel,\n");
+ printf("<b> switches to the blue channel, and <a>\n");
+ printf("is used to switch to change all channels.\n");
+ printf("\n");
+ printf("Press ENTER to continue, and ENTER again when\n");
+ printf("your are done.\n");
+ fflush(stdout);
+
+ while (getchar() != '\n');
+
+ printf("\033[H\033[2J");
+ fflush(stdout);
+ draw_contrast_brightness();
+
+ b = at_contrast = 0;
+ red = green = blue = 1;
+ mon = 0;
+ while ((c = getchar()) != '\n') {
+ if (b) {
+ b = 0;
+ if (c == 'A' && at_contrast) {
+ contrasts[0][mon] += (double)red / 100;
+ contrasts[1][mon] += (double)green / 100;
+ contrasts[2][mon] += (double)blue / 100;
+ } else if (c == 'A') {
+ brightnesses[0][mon] += (double)red / 100;
+ brightnesses[1][mon] += (double)green / 100;
+ brightnesses[2][mon] += (double)blue / 100;
+ } else if (c == 'B' && at_contrast) {
+ contrasts[0][mon] -= (double)red / 100;
+ contrasts[1][mon] -= (double)green / 100;
+ contrasts[2][mon] -= (double)blue / 100;
+ } else if (c == 'B') {
+ brightnesses[0][mon] -= (double)red / 100;
+ brightnesses[1][mon] -= (double)green / 100;
+ brightnesses[2][mon] -= (double)blue / 100;
+ } else if (c == 'C') {
+ mon = (mon + 1) % crtc_count;
+ } else if (c == 'D') {
+ mon = (mon == 0 ? crtc_count : mon) - 1;
+ }
+
+ if (c == 'A' || c == 'B')
+ apply_calibs();
+ }
+ else if (c == '[') b = 1;
+ else if (c == 'B') at_contrast = 0;
+ else if (c == 'C') at_contrast = 1;
+ else if (c == 'r') red = 1, green = 0, blue = 0;
+ else if (c == 'g') red = 0, green = 1, blue = 0;
+ else if (c == 'b') red = 0, green = 0, blue = 1;
+ else if (c == 'a') red = 1, green = 1, blue = 1;
+ }
+
+ printf("\033[H\033[2J");
+ printf("You will now be presented with squares used\n");
+ printf("to calibrate the gamma correction. There will\n");
+ printf("be four stacks: grey, red, green and blue.\n");
+ printf("Each stack has three squares: the upper square\n");
+ printf("shows the characterics of how the middle square\n");
+ printf("will look if the gamma is too high, and the\n");
+ printf("lower shows how the middile will look if the\n");
+ printf("gamma is too low. The middle square should\n");
+ printf("look like it is one single colour if the gamma\n");
+ printf("correction is configured correctly. You may\n");
+ printf("have to look from a distance or not focus\n");
+ printf("your eyes on the squares to compensate for\n");
+ printf("the fact that there actually multiple colours\n");
+ printf("is the square.\n");
+ printf("The grey should look perfectly grey when you\n");
+ printf("are done.\n");
+ printf("\n");
+ printf("<Left> and <right> is used to change which\n");
+ printf("monitor to calibrate. <Left> switches to the\n");
+ printf("previous monitor (one lower in index) and\n");
+ printf("<right> switches to the next monitor (one\n");
+ printf("higher in index.)\n");
+ printf("<Up> and <down> is used to increase and\n");
+ printf("descrease the gamma. respectively.\n");
+ printf("<r> is used to switch to changing the red.\n");
+ printf("channel, <g> switches to the green channel,\n");
+ printf("<b> switches to the blue channel, and <a>\n");
+ printf("is used to switch to change all channels.\n");
+ printf("\n");
+ printf("Press ENTER to continue, and ENTER again when\n");
+ printf("your are done.\n");
+ fflush(stdout);
+
+ while (getchar() != '\n');
+
+ printf("\033[H\033[2J");
+ fflush(stdout);
+ draw_gamma();
+
+ b = 0;
+ red = green = blue = 1;
+ mon = 0;
+ while ((c = getchar()) != '\n') {
+ if (b) {
+ b = 0;
+ if (c == 'A') {
+ gammas[0][mon] += (double)red / 100;
+ gammas[1][mon] += (double)green / 100;
+ gammas[2][mon] += (double)blue / 100;
+ } else if (c == 'B') {
+ gammas[0][mon] -= (double)red / 100;
+ gammas[1][mon] -= (double)green / 100;
+ gammas[2][mon] -= (double)blue / 100;
+ if (gammas[0][mon] < 0) gammas[0][mon] = 0;
+ if (gammas[1][mon] < 0) gammas[1][mon] = 0;
+ if (gammas[2][mon] < 0) gammas[2][mon] = 0;
+ } else if (c == 'C') {
+ mon = (mon + 1) % crtc_count;
+ } else if (c == 'D') {
+ mon = (mon == 0 ? crtc_count : mon) - 1;
+ }
+
+ if (c == 'A' || c == 'B')
+ apply_calibs();
+ }
+ else if (c == '[') b = 1;
+ else if (c == 'r') red = 1, green = 0, blue = 0;
+ else if (c == 'g') red = 0, green = 1, blue = 0;
+ else if (c == 'b') red = 0, green = 0, blue = 1;
+ else if (c == 'a') red = 1, green = 1, blue = 1;
+ }
+
+ printf("\033[H\033[2J");
+ printf("The next step is to calibrate the monitors'\n");
+ printf("convergence settings using the monitors'\n");
+ printf("control panel. White dots will be printed on the\n");
+ printf("screens, you should try to get as many as\n");
+ printf("possible of them to appear as pure white dots\n");
+ printf("rather than dots splitted in the red, green and\n");
+ printf("blue dots. On most CRT monitors this is not\n");
+ printf("possible to get all corners perfect.\n");
+ printf("\n");
+ printf("Press ENTER to continue, and ENTER again when\n");
+ printf("your are done.\n");
+ fflush(stdout);
+
+ while (getchar() != '\n');
+
+ printf("\033[H\033[2J");
+ fflush(stdout);
+ draw_convergence();
+
+ while (getchar() != '\n');
+
+ printf("\033[H\033[2J");
+ printf("The final step is to calbirate the monitors' moiré\n");
+ printf("cancellation. This too is done on the using the\n");
+ printf("monitors' control panel.\n");
+ printf("\n");
+ printf("You can use <d> and the arrow keys to change the\n");
+ printf("dot-pattern on the screens.\n");
+ printf("\n");
+ printf("Press ENTER to continue, and ENTER again when\n");
+ printf("your are done.\n");
+ fflush(stdout);
+
+ while (getchar() != '\n');
+
+ printf("\033[H\033[2J");
+ fflush(stdout);
+ draw_moire(1, 1);
+
+ b = 0;
+ d = 1;
+ gap = 1;
+ while ((c = getchar()) != '\n') {
+ if (b) {
+ b = 0;
+ if (c == 'A' || c == 'C') {
+ draw_moire(++gap, d);
+ } else if (c == 'B' || c == 'D') {
+ if (--gap == 0)
+ gap = 1;
+ draw_moire(gap, d);
+ }
+ } else if (c == '[') {
+ b = 1;
+ } else if (c == 'd') {
+ draw_moire(gap, d ^= 1);
+ }
+ }
+
+ printf("\033[H\033[2J");
+ fflush(stdout);
+
+ if (argc == 2) {
+ output_file = fopen(argv[1], "w");
+ if (!output_file)
+ goto fail;
+ }
+
+ if (save_calibs(output_file))
+ goto fail;
+ fflush(output_file);
+
+ if (argc == 2)
+ if (fclose(output_file))
+ goto fail;
+
+done:
+ if (!in_fork) {
+ release_video();
+ if (tty_configured)
+ tcsetattr(STDIN_FILENO, TCSAFLUSH, &saved_stty);
+ printf("\033[?25h");
+ fflush(stdout);
+ }
+ return rc;
+fail:
+ perror(*argv);
+ rc = 1;
+ goto done;
+}
diff --git a/common.h b/common.h
new file mode 100644
index 0000000..2daa994
--- /dev/null
+++ b/common.h
@@ -0,0 +1,393 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/ioctl.h>
+#include <linux/fb.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <math.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+
+/**
+ * Framebuffer information
+ */
+typedef struct framebuffer
+{
+ /**
+ * The file descriptor used to access the framebuffer, -1 if not opened
+ */
+ int fd;
+
+ /**
+ * The width of the display in pixels
+ */
+ uint32_t width;
+
+ /**
+ * The height of the display in pixels
+ */
+ uint32_t height;
+
+ /**
+ * Increment for `mem` to move to next pixel on the line
+ */
+ uint32_t bytes_per_pixel;
+
+ /**
+ * Increment for `mem` to move down one line but stay in the same column
+ */
+ uint32_t line_length;
+
+ /**
+ * Framebuffer pointer, `MAP_FAILED` (from <sys/mman.h>) if not mapped
+ */
+ int8_t *mem;
+
+} framebuffer_t;
+
+
+/**
+ * Graphics card information
+ */
+typedef struct drm_card
+{
+ /**
+ * File descriptor for the connection to the graphics card,
+ * -1 if not opened
+ */
+ int fd;
+
+ /**
+ * The graphics card's mode resources, `NULL` if not acquired
+ */
+ drmModeRes *restrict res;
+
+ /**
+ * The number of CRTC:s available on the graphics card
+ */
+ size_t crtc_count;
+
+ /**
+ * The available connectors
+ */
+ drmModeConnector **restrict connectors;
+
+ /**
+ * The available encoders
+ */
+ drmModeEncoder **restrict encoders;
+
+ /**
+ * The number of connectors and encoders
+ */
+ size_t connector_count;
+
+} drm_card_t;
+
+
+/**
+ * CRT controller information
+ */
+typedef struct drm_crtc
+{
+ /**
+ * CRT controller identifier
+ */
+ uint32_t id;
+
+ /**
+ * The graphics card
+ */
+ drm_card_t *restrict card;
+
+ /**
+ * The CRT controller's connector
+ */
+ drmModeConnector *restrict connector;
+
+ /**
+ * The CRT controller's encoder
+ */
+ drmModeEncoder *restrict encoder;
+
+ /**
+ * Whether the connector is connected
+ */
+ int connected;
+
+ /**
+ * The CRT's EDID, hexadecimally encoded
+ */
+ char *restrict edid;
+
+ /**
+ * The number of stops on the gamma ramps
+ */
+ size_t gamma_stops;
+
+ /**
+ * The gamma ramp for the red channel
+ */
+ uint16_t *restrict red;
+
+ /**
+ * The gamma ramp for the green channel
+ */
+ uint16_t *restrict green;
+
+ /**
+ * The gamma ramp for the blue channel
+ */
+ uint16_t *restrict blue;
+
+} drm_crtc_t;
+
+
+
+/***** gamma.c *****/
+
+/**
+ * Analyse a gamma ramp
+ *
+ * @param stops The number of stops in the gamma ramp
+ * @param ramp The gamma ramp
+ * @param gamma Output parameter for the gamma
+ * @param contrast Output parameter for the contrast
+ * @param brightness Output parameter for the brightness
+ */
+void gamma_analyse(size_t stops, const uint16_t* restrict ramp, double *restrict gamma,
+ double *restrict contrast, double* restrict brightness);
+
+/**
+ * Generate a gamma ramp
+ *
+ * @param stops The number of stops in the gamma ramp
+ * @param ramp Memory area to where to write the gamma ramp
+ * @param gamma The gamma
+ * @param contrast The contrast
+ * @param brightness The brightness
+ */
+void gamma_generate(size_t stops, uint16_t *restrict ramp, double gamma, double contrast, double brightness);
+
+
+
+/***** framebuffer.c *****/
+
+/**
+ * Figure out how many framebuffers there are on the system
+ *
+ * @return The number of framebuffers on the system
+ */
+size_t fb_count(void);
+
+/**
+ * Open a framebuffer
+ *
+ * @param index The index of the framebuffer to open
+ * @param fb Framebuffer information to fill in
+ * @return Zero on success, -1 on error
+ */
+int fb_open(size_t index, framebuffer_t *restrict fb);
+
+/**
+ * Close a framebuffer
+ *
+ * @param fb The framebuffer information
+ */
+void fb_close(framebuffer_t *restrict fb);
+
+/**
+ * Construct an sRGB colour in 32-bit XRGB encoding to
+ * use when specifying colours
+ *
+ * @param red The red component from [0, 255] sRGB
+ * @param green The green component from [0, 255] sRGB
+ * @param blue The blue component from [0, 255] sRGB
+ * @return The colour as one 32-bit integer
+ */
+#ifdef __GNUC__
+__attribute__((__const__))
+#endif
+uint32_t fb_colour(int red, int green, int blue);
+
+/**
+ * Print a filled in rectangle to a framebuffer
+ *
+ * @param fb The framebuffer
+ * @param colour The colour to use when drawing the rectangle
+ * @param x The starting pixel on the X axis for the rectangle
+ * @param y The starting pixel on the Y axis for the rectangle
+ * @param width The width of the rectangle, in pixels
+ * @param height The height of the rectangle, in pixels
+ */
+void fb_fill_rectangle(framebuffer_t *restrict fb, uint32_t colour, uint32_t x, uint32_t y, uint32_t width, uint32_t height);
+
+/**
+ * Draw a horizontal line segment on a framebuffer
+ *
+ * @param fb The framebuffer
+ * @param colour The colour to use when drawing the rectangle
+ * @param x The starting pixel on the X axis for the line segment
+ * @param y The starting pixel on the Y axis for the line segment
+ * @param length The length of the line segment, in pixels
+ */
+void fb_draw_horizontal_line(framebuffer_t *restrict fb, uint32_t colour, uint32_t x, uint32_t y, uint32_t length);
+
+/**
+ * Draw a vertical line segment on a framebuffer
+ *
+ * @param fb The framebuffer
+ * @param colour The colour to use when drawing the rectangle
+ * @param x The starting pixel on the X axis for the line segment
+ * @param y The starting pixel on the Y axis for the line segment
+ * @param length The length of the line segment, in pixels
+ */
+void fb_draw_vertical_line(framebuffer_t *restrict fb, uint32_t colour, uint32_t x, uint32_t y, uint32_t length);
+
+/**
+ * Draw a single on a framebuffer
+ *
+ * @param fb The framebuffer
+ * @param colour The colour to use when drawing the rectangle
+ * @param x The pixel's position on the X axis
+ * @param y The pixel's position on the Y axis
+ */
+static inline void
+fb_draw_pixel(framebuffer_t *restrict fb, uint32_t colour, uint32_t x, uint32_t y)
+{
+ int8_t *mem = fb->mem + y * fb->line_length + x * fb->bytes_per_pixel;
+ *(uint32_t *)mem = colour;
+}
+
+
+
+/***** state.c ******/
+
+/**
+ * The framebuffers on the system
+ */
+extern framebuffer_t *restrict framebuffers;
+
+/**
+ * The number of elements in `framebuffers`
+ */
+extern size_t framebuffer_count;
+
+/**
+ * The graphics cards on the system
+ */
+extern drm_card_t *restrict cards;
+
+/**
+ * The number of elements in `cards`
+ */
+extern size_t card_count;
+
+/**
+ * The connected CRT controllers on the system
+ */
+extern drm_crtc_t *restrict crtcs;
+
+/**
+ * The software brightness setting on each connected CRT controller, on each channel
+ */
+extern double *restrict brightnesses[3];
+
+/**
+ * The software contrast setting on each connected CRT controller, on each channel
+ */
+extern double *restrict contrasts[3];
+
+/**
+ * The gamma correction on each connected CRT controller, on each channel
+ */
+extern double *restrict gammas[3];
+
+/**
+ * The number of elements in `crtcs`, `brightnesses[]`, `contrasts[]` and `gammas[]`
+ */
+extern size_t crtc_count;
+
+/**
+ * Acquire video control
+ *
+ * @return Zero on success, -1 on error
+ */
+int acquire_video(void);
+
+/**
+ * Release video control
+ */
+void release_video(void);
+
+
+
+/***** drmgamma.c ******/
+
+/**
+ * Figure out how many graphics cards there are on the system
+ *
+ * @return The number of graphics cards on the system
+ */
+size_t drm_card_count(void);
+
+/**
+ * Acquire access to a graphics card
+ *
+ * @param index The index of the graphics card
+ * @param card Graphics card information to fill in
+ * @return Zero on success, -1 on error
+ */
+int drm_card_open(size_t index, drm_card_t *restrict card);
+
+/**
+ * Release access to a graphics card
+ *
+ * @param card The graphics card information
+ */
+void drm_card_close(drm_card_t *restrict card);
+
+/**
+ * Acquire access to a CRT controller
+ *
+ * @param index The index of the CRT controller
+ * @param card The graphics card information
+ * @param crtc CRT controller information to fill in
+ * @return Zero on success, -1 on error
+ */
+int drm_crtc_open(size_t index, drm_card_t *restrict card, drm_crtc_t *restrict crtc);
+
+/**
+ * Release access to a CRT controller
+ *
+ * @param crtc The CRT controller information to fill in
+ */
+void drm_crtc_close(drm_crtc_t *restrict crtc);
+
+/**
+ * Read the gamma ramps for a CRT controller
+ *
+ * @param crtc CRT controller information
+ * @return Zero on success, -1 on error
+ */
+int drm_get_gamma(drm_crtc_t *restrict crtc);
+
+/**
+ * Apply gamma ramps for a CRT controller
+ *
+ * @param crtc CRT controller information
+ * @return Zero on success, -1 on error
+ */
+int drm_set_gamma(drm_crtc_t *restrict crtc);
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..1288e57
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,6 @@
+PREFIX = /usr
+MANPREFIX = $(PREFIX)/share/man
+
+CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700
+CFLAGS = -std=c99 -Wall $$(pkg-config --cflags libdrm)
+LDFLAGS = -lm $$(pkg-config --libs libdrm)
diff --git a/doc/man/crt-calibrator.1 b/crt-calibrator.1
index f2d3ba2..f2d3ba2 100644
--- a/doc/man/crt-calibrator.1
+++ b/crt-calibrator.1
diff --git a/dist/archlinux/stable/.gitignore b/dist/archlinux/stable/.gitignore
deleted file mode 100644
index b070320..0000000
--- a/dist/archlinux/stable/.gitignore
+++ /dev/null
@@ -1,9 +0,0 @@
-*
-!/.git*
-!/PKGBUILD
-!/crt-calibrator.install
-*~
-*.swo
-*.swp
-*.bak
-
diff --git a/dist/archlinux/stable/PKGBUILD b/dist/archlinux/stable/PKGBUILD
deleted file mode 100644
index da46d3d..0000000
--- a/dist/archlinux/stable/PKGBUILD
+++ /dev/null
@@ -1,25 +0,0 @@
-# Maintainer: Mattias Andrée <`base64 -d`(bWFhbmRyZWUK)@member.fsf.org>
-
-pkgname=crt-calibrator
-pkgver=1.3.1
-pkgrel=1
-pkgdesc="CRT monitor calibrator utility for Linux VT"
-url="https://github.com/maandree/crt-calibrator"
-arch=(i686 x86_64)
-license=(GPL3)
-depends=(glibc libdrm linux)
-makedepends=(make coreutils gcc glibc libdrm linux texinfo)
-install=crt-calibrator.install
-source=("${url}/archive/${pkgver}.tar.gz")
-sha256sums=(23ec9913dcfb2e4a0a7879a1665a1026648367a88411e7c50621e06d0ce781e5)
-
-build() {
- cd "${srcdir}/crt-calibrator-${pkgver}"
- make DESTDIR="${pkgdir}"
-}
-
-package() {
- cd "${srcdir}/crt-calibrator-${pkgver}"
- make DESTDIR="${pkgdir}" install
-}
-
diff --git a/dist/archlinux/stable/crt-calibrator.install b/dist/archlinux/stable/crt-calibrator.install
deleted file mode 100644
index 00682af..0000000
--- a/dist/archlinux/stable/crt-calibrator.install
+++ /dev/null
@@ -1,20 +0,0 @@
-_file="crt-calibrator"
-
-infodir="usr/share/info"
-file="${_file}.info"
-
-
-post_install() {
- [[ -x "usr/bin/install-info" ]] || return 0
- install-info -- "${infodir}/${file}" "${infodir}/dir" 2> /dev/null
-}
-
-post_upgrade() {
- post_install "$1"
-}
-
-pre_remove() {
- [[ -x "usr/bin/install-info" ]] || return 0
- install-info --delete -- "${infodir}/${file}" "${infodir}/dir" 2> /dev/null
-}
-
diff --git a/doc/info/crt-calibrator.texinfo b/doc/info/crt-calibrator.texinfo
deleted file mode 100644
index 602191f..0000000
--- a/doc/info/crt-calibrator.texinfo
+++ /dev/null
@@ -1,90 +0,0 @@
-\input texinfo @c -*-texinfo-*-
-
-@c %**start of header
-@setfilename crt-calibrator.info
-@settitle crt-calibrator
-@afourpaper
-@documentencoding UTF-8
-@documentlanguage en
-@finalout
-@c %**end of header
-
-
-@dircategory Miscellaneous
-@direntry
-* crt-calibrator: (crt-calibrator). CRT monitor calibrator utility for Linux VT
-@end direntry
-
-
-@copying
-Copyright @copyright{} 2015 Mattias Andrée
-
-@quotation
-Permission is granted to copy, distribute and/or modify this document
-under the terms of the GNU Free Documentation License, Version 1.3 or
-any later version published by the Free Software Foundation; with no
-Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
-Texts. A copy of the license is included in the section entitled
-``GNU Free Documentation License''.
-@end quotation
-@end copying
-
-@ifnottex
-@node Top
-@top crt-calibrator -- CRT monitor calibrator utility for Linux VT
-@insertcopying
-@end ifnottex
-
-@titlepage
-@title crt-calibrator
-@subtitle Passphrase strength evaluator
-@author by Mattias Andrée (maandree)
-
-@page
-@vskip 0pt plus 1filll
-@insertcopying
-@page
-@end titlepage
-
-@contents
-
-
-
-@menu
-* Overview:: Brief overview of @command{crt-calibrator}.
-* Invoking:: Executing @command{crt-calibrator}.
-* GNU Free Documentation License:: Copying and sharing this manual.
-@end menu
-
-
-
-@node Overview
-@chapter Overview
-
-@command{crt-calibrator} is an interactive tool that guides
-you through calibrating your CRT monitors.
-
-The program cannot be run from inside X, it is required that
-it is run from the Linux VT, otherwise known as the TTY.
-
-
-
-@node Invoking
-@chapter Invoking
-
-@command{crt-calibrator} takes atmost one argument,
-which must not start with a dash.
-
-When done, the program will print gamma-ramp information
-that is useful when setting the calibrations automatically.
-If a file has been specified via the command line, this
-information is stored to that that file.
-
-
-
-@node GNU Free Documentation License
-@appendix GNU Free Documentation License
-@include fdl.texinfo
-
-@bye
-
diff --git a/doc/info/fdl.texinfo b/doc/info/fdl.texinfo
deleted file mode 100644
index cb71f05..0000000
--- a/doc/info/fdl.texinfo
+++ /dev/null
@@ -1,505 +0,0 @@
-@c The GNU Free Documentation License.
-@center Version 1.3, 3 November 2008
-
-@c This file is intended to be included within another document,
-@c hence no sectioning command or @node.
-
-@display
-Copyright @copyright{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
-@uref{http://fsf.org/}
-
-Everyone is permitted to copy and distribute verbatim copies
-of this license document, but changing it is not allowed.
-@end display
-
-@enumerate 0
-@item
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-functional and useful document @dfn{free} in the sense of freedom: to
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-with or without modifying it, either commercially or noncommercially.
-Secondarily, this License preserves for the author and publisher a way
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-for modifications made by others.
-
-This License is a kind of ``copyleft'', which means that derivative
-works of the document must themselves be free in the same sense. It
-complements the GNU General Public License, which is a copyleft
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-
-We have designed this License in order to use it for manuals for free
-software, because free software needs free documentation: a free
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-@item
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-The operator of an MMC Site may republish an MMC contained in the site
-under CC-BY-SA on the same site at any time before August 1, 2009,
-provided the MMC is eligible for relicensing.
-
-@end enumerate
-
-@page
-@heading ADDENDUM: How to use this License for your documents
-
-To use this License in a document you have written, include a copy of
-the License in the document and put the following copyright and
-license notices just after the title page:
-
-@smallexample
-@group
- Copyright (C) @var{year} @var{your name}.
- Permission is granted to copy, distribute and/or modify this document
- under the terms of the GNU Free Documentation License, Version 1.3
- or any later version published by the Free Software Foundation;
- with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
- Texts. A copy of the license is included in the section entitled ``GNU
- Free Documentation License''.
-@end group
-@end smallexample
-
-If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
-replace the ``with@dots{}Texts.''@: line with this:
-
-@smallexample
-@group
- with the Invariant Sections being @var{list their titles}, with
- the Front-Cover Texts being @var{list}, and with the Back-Cover Texts
- being @var{list}.
-@end group
-@end smallexample
-
-If you have Invariant Sections without Cover Texts, or some other
-combination of the three, merge those two alternatives to suit the
-situation.
-
-If your document contains nontrivial examples of program code, we
-recommend releasing these examples in parallel under your choice of
-free software license, such as the GNU General Public License,
-to permit their use in free software.
-
-@c Local Variables:
-@c ispell-local-pdict: "ispell-dict"
-@c End:
diff --git a/drmgamma.c b/drmgamma.c
new file mode 100644
index 0000000..43adb2e
--- /dev/null
+++ b/drmgamma.c
@@ -0,0 +1,262 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * The number of elements to allocates to a buffer for a DRM device pathname
+ */
+#define DRM_DEV_NAME_MAX_LEN\
+ ((sizeof(DRM_DEV_NAME) + sizeof(DRM_DIR_NAME)) / sizeof(char) + 3 * sizeof(int))
+
+
+
+/**
+ * Figure out how many graphics cards there are on the system
+ *
+ * @return The number of graphics cards on the system
+ */
+size_t
+drm_card_count(void)
+{
+ char buf[DRM_DEV_NAME_MAX_LEN];
+ size_t count = 0;
+ for (;; count++) {
+ sprintf(buf, DRM_DEV_NAME, DRM_DIR_NAME, (int)count);
+ if (access(buf, F_OK) < 0)
+ return count;
+ }
+}
+
+/**
+ * Acquire access to a graphics card
+ *
+ * @param index The index of the graphics card
+ * @param card Graphics card information to fill in
+ * @return Zero on success, -1 on error
+ */
+int
+drm_card_open(size_t index, drm_card_t *restrict card)
+{
+ char buf[DRM_DEV_NAME_MAX_LEN];
+ int old_errno;
+ size_t i, n;
+
+ card->fd = -1;
+ card->res = NULL;
+ card->connectors = NULL;
+ card->encoders = NULL;
+ card->connector_count = 0;
+
+ sprintf(buf, DRM_DEV_NAME, DRM_DIR_NAME, (int)index);
+ card->fd = open(buf, O_RDWR);
+ if (card->fd < 0)
+ goto fail;
+
+ card->res = drmModeGetResources(card->fd);
+ if (!card->res)
+ goto fail;
+
+ card->crtc_count = (size_t)(card->res->count_crtcs);
+ card->connector_count = (size_t)(card->res->count_connectors);
+ n = card->connector_count;
+
+ card->connectors = calloc(n, sizeof(drmModeConnector*));
+ if (!card->connectors)
+ goto fail;
+ card->encoders = calloc(n, sizeof(drmModeEncoder*));
+ if (!card->encoders)
+ goto fail;
+
+ for (i = 0; i < n; i++) {
+ card->connectors[i] = drmModeGetConnector(card->fd, card->res->connectors[i]);
+ if (!card->connectors[i])
+ goto fail;
+
+ if (card->connectors[i]->encoder_id) {
+ card->encoders[i] = drmModeGetEncoder(card->fd, card->connectors[i]->encoder_id);
+ if (!card->encoders[i])
+ goto fail;
+ }
+ }
+
+ return 0;
+fail:
+ old_errno = errno;
+ drm_card_close(card);
+ errno = old_errno;
+ return -1;
+}
+
+
+/**
+ * Release access to a graphics card
+ *
+ * @param card The graphics card information
+ */
+void
+drm_card_close(drm_card_t *restrict card)
+{
+ size_t i, n = card->connector_count;
+
+ if (card->encoders) {
+ for (i = 0; i < n; i++)
+ if (card->encoders[i])
+ drmModeFreeEncoder(card->encoders[i]);
+ free(card->encoders);
+ card->encoders = NULL;
+ }
+
+ if (card->connectors) {
+ for (i = 0; i < n; i++)
+ if (card->connectors[i])
+ drmModeFreeConnector(card->connectors[i]);
+ free(card->connectors);
+ card->connectors = NULL;
+ }
+
+ if (card->res) {
+ drmModeFreeResources(card->res);
+ card->res = NULL;
+ }
+ if (card->fd >= 0) {
+ close(card->fd);
+ card->fd = -1;
+ }
+}
+
+
+/**
+ * Acquire access to a CRT controller
+ *
+ * @param index The index of the CRT controller
+ * @param card The graphics card information
+ * @param crtc CRT controller information to fill in
+ * @return Zero on success, -1 on error
+ */
+int
+drm_crtc_open(size_t index, drm_card_t *restrict card, drm_crtc_t *restrict crtc)
+{
+ drmModePropertyRes *restrict prop;
+ drmModePropertyBlobRes *restrict blob;
+ drmModeCrtc *restrict info;
+ size_t i, j;
+ int old_errno;
+ unsigned char c;
+
+ crtc->edid = NULL;
+ crtc->red = NULL;
+ crtc->green = NULL;
+ crtc->blue = NULL;
+
+ crtc->id = card->res->crtcs[index];
+ crtc->card = card;
+
+ crtc->connector = NULL;
+ crtc->encoder = NULL;
+ for (i = 0; i < card->connector_count; i++) {
+ if (card->encoders[i]) {
+ if (card->encoders[i]->crtc_id == crtc->id) {
+ crtc->connector = card->connectors[i];
+ crtc->encoder = card->encoders[i];
+ }
+ }
+ }
+
+ crtc->connected = crtc->connector && crtc->connector->connection == DRM_MODE_CONNECTED;
+
+ info = drmModeGetCrtc(card->fd, crtc->id);
+ if (!info)
+ return -1;
+ crtc->gamma_stops = (size_t)info->gamma_size;
+ drmModeFreeCrtc(info);
+
+ /* `calloc` is for some reason required when reading the gamma ramps. */
+ crtc->red = calloc(3 * crtc->gamma_stops, sizeof(uint16_t));
+ if (!crtc->red)
+ return -1;
+ crtc->green = crtc->red + crtc->gamma_stops;
+ crtc->blue = crtc->green + crtc->gamma_stops;
+
+ if (!crtc->connector)
+ return 0;
+ for (i = 0; i < (size_t)crtc->connector->count_props; i++) {
+ prop = drmModeGetProperty(card->fd, crtc->connector->props[i]);
+ if (!prop)
+ continue;
+
+ if (strcmp(prop->name, "EDID"))
+ goto free_prop;
+
+ blob = drmModeGetPropertyBlob(card->fd, (uint32_t)crtc->connector->prop_values[i]);
+ i = (size_t)crtc->connector->count_props;
+ if (!blob || !blob->data)
+ goto free_blob;
+
+ crtc->edid = malloc((blob->length * 2 + 1) * sizeof(char));
+ if (!crtc->edid) {
+ old_errno = errno;
+ drmModeFreePropertyBlob(blob);
+ drmModeFreeProperty(prop);
+ free(crtc->red);
+ crtc->red = NULL;
+ errno = old_errno;
+ return -1;
+ }
+ for (j = 0; j < blob->length; j++) {
+ c = ((unsigned char *)blob->data)[j];
+ crtc->edid[j * 2 + 0] = "0123456789ABCDEF"[(c >> 4) & 15];
+ crtc->edid[j * 2 + 1] = "0123456789ABCDEF"[(c >> 0) & 15];
+ }
+ crtc->edid[blob->length * 2] = '\0';
+
+ free_blob:
+ if (blob)
+ drmModeFreePropertyBlob(blob);
+
+ free_prop:
+ drmModeFreeProperty(prop);
+ }
+
+ return 0;
+}
+
+
+/**
+ * Release access to a CRT controller
+ *
+ * @param crtc The CRT controller information to fill in
+ */
+void
+drm_crtc_close(drm_crtc_t *restrict crtc)
+{
+ free(crtc->edid);
+ free(crtc->red);
+ crtc->edid = NULL;
+ crtc->red = NULL;
+}
+
+
+/**
+ * Read the gamma ramps for a CRT controller
+ *
+ * @param crtc CRT controller information
+ * @return Zero on success, -1 on error
+ */
+int
+drm_get_gamma(drm_crtc_t *restrict crtc)
+{
+ return -!!drmModeCrtcGetGamma(crtc->card->fd, crtc->id, (uint32_t)crtc->gamma_stops, crtc->red, crtc->green, crtc->blue);
+}
+
+
+/**
+ * Apply gamma ramps for a CRT controller
+ *
+ * @param crtc CRT controller information
+ * @return Zero on success, -1 on error
+ */
+int
+drm_set_gamma(drm_crtc_t *restrict crtc)
+{
+ return -!!drmModeCrtcSetGamma(crtc->card->fd, crtc->id, (uint32_t)crtc->gamma_stops, crtc->red, crtc->green, crtc->blue);
+}
diff --git a/framebuffer.c b/framebuffer.c
new file mode 100644
index 0000000..29459ac
--- /dev/null
+++ b/framebuffer.c
@@ -0,0 +1,183 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * The psuedodevice pathname pattern used to access a framebuffer
+ */
+#ifndef FB_DEVICE_PATTERN
+# define FB_DEVICE_PATTERN "/dev/fb%lu"
+#endif
+
+
+/**
+ * The number of elements to allocates to a buffer for a framebuffer device pathname
+ */
+#define FB_DEVICE_MAX_LEN (sizeof(FB_DEVICE_PATTERN) / sizeof(char) + 3 * sizeof(size_t))
+
+
+
+/**
+ * Figure out how many framebuffers there are on the system
+ *
+ * @return The number of framebuffers on the system
+ */
+size_t
+fb_count(void)
+{
+ char buf[FB_DEVICE_MAX_LEN];
+ size_t count = 0;
+
+ for (;; count++) {
+ sprintf(buf, FB_DEVICE_PATTERN, count);
+ if (access(buf, F_OK) < 0)
+ return count;
+ }
+}
+
+
+/**
+ * Open a framebuffer
+ *
+ * @param index The index of the framebuffer to open
+ * @param fb Framebuffer information to fill in
+ * @return Zero on success, -1 on error
+ */
+int
+fb_open(size_t index, framebuffer_t *restrict fb)
+{
+ char buf[FB_DEVICE_MAX_LEN];
+ struct fb_fix_screeninfo fix_info;
+ struct fb_var_screeninfo var_info;
+ int old_errno;
+
+ fb->fd = -1;
+ fb->mem = MAP_FAILED;
+
+ sprintf(buf, FB_DEVICE_PATTERN, index);
+ fb->fd = open(buf, O_RDWR);
+ if (fb->fd < 0)
+ goto fail;
+
+ if (ioctl(fb->fd, (unsigned long int)FBIOGET_FSCREENINFO, &fix_info) ||
+ ioctl(fb->fd, (unsigned long int)FBIOGET_VSCREENINFO, &var_info))
+ goto fail;
+
+ fb->mem = mmap(NULL, (size_t)(fix_info.smem_len), PROT_WRITE, MAP_SHARED, fb->fd, (off_t)0);
+ if (fb->mem == MAP_FAILED)
+ goto fail;
+
+ fb->mem += var_info.xoffset * (var_info.bits_per_pixel / 8);
+ fb->mem += var_info.yoffset * fix_info.line_length;
+
+ fb->width = var_info.xres;
+ fb->height = var_info.yres;
+ fb->bytes_per_pixel = var_info.bits_per_pixel / 8;
+ fb->line_length = fix_info.line_length;
+
+ return 0;
+fail:
+ old_errno = errno;
+ fb_close(fb);
+ errno = old_errno;
+ return -1;
+}
+
+
+/**
+ * Close a framebuffer
+ *
+ * @param fb The framebuffer information
+ */
+void
+fb_close(framebuffer_t *restrict fb)
+{
+ if (fb->fd >= 0) {
+ close(fb->fd);
+ fb->fd = -1;
+ }
+}
+
+
+/**
+ * Construct an sRGB colour in 32-bit XRGB encoding to
+ * use when specifying colours
+ *
+ * @param red The red component from [0, 255] sRGB
+ * @param green The green component from [0, 255] sRGB
+ * @param blue The blue component from [0, 255] sRGB
+ * @return The colour as one 32-bit integer
+ */
+uint32_t
+fb_colour(int red, int green, int blue)
+{
+ uint32_t rc = 0;
+ rc |= (uint32_t)red, rc <<= 8;
+ rc |= (uint32_t)green, rc <<= 8;
+ rc |= (uint32_t)blue;
+ return rc;
+}
+
+
+/**
+ * Print a filled in rectangle to a framebuffer
+ *
+ * @param fb The framebuffer
+ * @param colour The colour to use when drawing the rectangle
+ * @param x The starting pixel on the X axis for the rectangle
+ * @param y The starting pixel on the Y axis for the rectangle
+ * @param width The width of the rectangle, in pixels
+ * @param height The height of the rectangle, in pixels
+ */
+void
+fb_fill_rectangle(framebuffer_t *restrict fb, uint32_t colour, uint32_t x, uint32_t y, uint32_t width, uint32_t height)
+{
+ int8_t *mem = fb->mem + y * fb->line_length;
+ size_t x1 = x * fb->bytes_per_pixel;
+ size_t x2 = (x + width) * fb->bytes_per_pixel;
+ size_t y2 = y + height;
+ size_t x_, y_;
+ for (y_ = y; y_ != y2; y_++, mem += fb->line_length)
+ for (x_ = x1; x_ != x2; x_ += fb->bytes_per_pixel)
+ *(uint32_t *)&mem[x_] = colour;
+}
+
+
+/**
+ * Draw a horizontal line segment on a framebuffer
+ *
+ * @param fb The framebuffer
+ * @param colour The colour to use when drawing the rectangle
+ * @param x The starting pixel on the X axis for the line segment
+ * @param y The starting pixel on the Y axis for the line segment
+ * @param length The length of the line segment, in pixels
+ */
+void fb_draw_horizontal_line(framebuffer_t *restrict fb, uint32_t colour, uint32_t x, uint32_t y, uint32_t length)
+{
+ int8_t *mem = fb->mem + y * fb->line_length;
+ size_t x1 = x * fb->bytes_per_pixel;
+ size_t x2 = (x + length) * fb->bytes_per_pixel;
+ size_t x_;
+ for (x_ = x1; x_ != x2; x_ += fb->bytes_per_pixel)
+ *(uint32_t *)&mem[x_] = colour;
+}
+
+
+/**
+ * Draw a vertical line segment on a framebuffer
+ *
+ * @param fb The framebuffer
+ * @param colour The colour to use when drawing the rectangle
+ * @param x The starting pixel on the X axis for the line segment
+ * @param y The starting pixel on the Y axis for the line segment
+ * @param length The length of the line segment, in pixels
+ */
+void fb_draw_vertical_line(framebuffer_t *restrict fb, uint32_t colour, uint32_t x, uint32_t y, uint32_t length)
+{
+ int8_t *mem = fb->mem + y * fb->line_length + x * fb->bytes_per_pixel;
+ size_t y2 = y + length;
+ size_t y_;
+
+ for (y_ = y; y_ != y2; y_++, mem += fb->line_length)
+ *(uint32_t *)mem = colour;
+}
diff --git a/gamma.c b/gamma.c
new file mode 100644
index 0000000..d15f3b6
--- /dev/null
+++ b/gamma.c
@@ -0,0 +1,57 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * Analyse a gamma ramp
+ *
+ * @param stops The number of stops in the gamma ramp
+ * @param ramp The gamma ramp
+ * @param gamma Output parameter for the gamma
+ * @param contrast Output parameter for the contrast
+ * @param brightness Output parameter for the brightness
+ */
+void gamma_analyse(size_t stops, const uint16_t *restrict ramp, double *restrict gamma,
+ double *restrict contrast, double *restrict brightness)
+{
+ double min, middle, max;
+ *brightness = min = (double)(ramp[0]) / (double)0xFFFF;
+ *contrast = max = (double)(ramp[stops - 1]) / (double)0xFFFF;
+ middle = (double)(ramp[stops / 2]) / (double)0xFFFF;
+
+ if (!(stops % 2)) {
+ middle += (double)(ramp[stops / 2 - 1]) / (double)0xFFFF;
+ middle /= (double)2;
+ }
+
+ middle = (middle - min) / (max - min);
+ *gamma = -log((double)2) / log(middle);
+}
+
+
+/**
+ * Generate a gamma ramp
+ *
+ * @param stops The number of stops in the gamma ramp
+ * @param ramp Memory area to where to write the gamma ramp
+ * @param gamma The gamma
+ * @param contrast The contrast
+ * @param brightness The brightness
+ */
+void gamma_generate(size_t stops, uint16_t *restrict ramp, double gamma, double contrast, double brightness)
+{
+ double diff = contrast - brightness;
+ double gamma_ = (double)1 / gamma;
+ size_t i;
+ int32_t y;
+ double y_;
+
+ for (i = 0; i < stops; i++) {
+ y_ = (double)i / (double)stops;
+ y_ = pow(y_, gamma_) * diff + brightness;
+ y = (int32_t)(y_ * 0xFFFF);
+ if (y < 0x0000) y = 0x0000;
+ if (y > 0xFFFF) y = 0xFFFF;
+ ramp[i] = (uint16_t)y;
+ }
+}
diff --git a/src/calibrator.c b/src/calibrator.c
deleted file mode 100644
index a22feb4..0000000
--- a/src/calibrator.c
+++ /dev/null
@@ -1,733 +0,0 @@
-/**
- * crt-calibrator – Calibration utility for CRT monitors
- * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#include "calibrator.h"
-
-#include "gamma.h"
-#include "state.h"
-
-#include <unistd.h>
-#include <termios.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <errno.h>
-
-
-
-/**
- * Draw bars in different shades of grey, red, green and blue
- * used for calibrating the contrast and brightness
- */
-void draw_contrast_brightness(void)
-{
- const int CONTRAST_BRIGHTNESS_LEVELS[21] =
- {
- 0, 17, 27, 38, 48, 59, 70, 82, 94, 106, 119, 131,
- 144, 158, 171, 185, 198, 212, 226, 241, 255
- };
- size_t f;
- uint32_t y, x;
- for (f = 0; f < framebuffer_count; f++)
- {
- framebuffer_t* restrict fb = framebuffers + f;
- for (y = 0; y < 4; y++)
- for (x = 0; x < 21; x++)
- {
- int v = CONTRAST_BRIGHTNESS_LEVELS[x];
- uint32_t colour = fb_colour(v * ((y == 1) | (y == 0)),
- v * ((y == 2) | (y == 0)),
- v * ((y == 3) | (y == 0)));
- fb_fill_rectangle(fb, colour,
- x * fb->width / 21,
- y * fb->height / 4,
- (x + 1) * fb->width / 21 - x * fb->width / 21,
- (y + 1) * fb->height / 4 - y * fb->height / 4);
- }
- }
-}
-
-
-/**
- * Draw a seven segment display
- *
- * @param fb The framebuffer to draw on
- * @param colour The intensity of the least intense colour to use
- * @param x The X component of the top left corner of the seven segment display
- * @param y The Y component of the top left corner of the seven segment display
- */
-void draw_digit(framebuffer_t* restrict fb, int colour, uint32_t x, uint32_t y)
-{
- uint32_t c;
-
- c = fb_colour(colour + 0, colour + 0, colour + 0);
- fb_fill_rectangle(fb, c, x + 20, y, 80, 20);
-
- c = fb_colour(colour + 1, colour + 1, colour + 1);
- fb_fill_rectangle(fb, c, x, y + 20, 20, 80);
-
- c = fb_colour(colour + 2, colour + 2, colour + 2);
- fb_fill_rectangle(fb, c, x + 100, y + 20, 20, 80);
-
- c = fb_colour(colour + 3, colour + 3, colour + 3);
- fb_fill_rectangle(fb, c, x + 20, y + 100, 80, 20);
-
- c = fb_colour(colour + 4, colour + 4, colour + 4);
- fb_fill_rectangle(fb, c, x, y + 120, 20, 80);
-
- c = fb_colour(colour + 5, colour + 5, colour + 5);
- fb_fill_rectangle(fb, c, x + 100, y + 120, 20, 80);
-
- c = fb_colour(colour + 6, colour + 6, colour + 6);
- fb_fill_rectangle(fb, c, x + 20, y + 200, 80, 20);
-}
-
-
-/**
- * Manipulate a CRT controllers gamma ramps to display a specific digit
- * for one of the seven segment display on only that CRT controller's
- * monitors
- *
- * @param crtc The CRT controller information
- * @param colour The intensity of the least intense colour in the seven segment display
- * @param value The valud of the digit to display
- */
-void gamma_digit(drm_crtc_t* restrict crtc, int colour, size_t value)
-{
-#define __ 0
- const int DIGITS[11] = { 1 | 2 | 4 | __ | 16 | 32 | 64, /* (0) */
- __ | __ | 4 | __ | __ | 32 | __, /* (1) */
- 1 | __ | 4 | 8 | 16 | __ | 64, /* (2) */
- 1 | __ | 4 | 8 | __ | 32 | 64, /* (3) */
- __ | 2 | 4 | 8 | __ | 32 | __, /* (4) */
- 1 | 2 | __ | 8 | __ | 32 | 64, /* (5) */
- 1 | 2 | __ | 8 | 16 | 32 | 64, /* (6) */
- 1 | __ | 4 | __ | __ | 32 | __, /* (7) */
- 1 | 2 | 4 | 8 | 16 | 32 | 64, /* (8) */
- 1 | 2 | 4 | 8 | __ | 32 | 64, /* (9) */
- __ | __ | __ | __ | __ | __ | __}; /* not visible */
- int i, digit = DIGITS[value];
-
- for (i = 0; i < 7; i++)
- {
- uint16_t c = (digit & (1 << i)) ? 0xFFFF : 0;
- int j = i + colour;
- crtc->red[j] = crtc->green[j] = crtc->blue[j] = c;
- }
-#undef __
-}
-
-
-/**
- * Draw an unique index on each monitor
- *
- * @return Zero on success, -1 on error
- */
-int draw_id(void)
-{
- size_t f, c, id = 0;
- for (f = 0; f < framebuffer_count; f++)
- {
- framebuffer_t* restrict fb = framebuffers + f;
- fb_fill_rectangle(fb, fb_colour(0, 0, 0), 0, 0, fb->width, fb->height);
- draw_digit(fb, 1, 40, 40);
- draw_digit(fb, 8, 180, 40);
- }
- for (c = 0; c < crtc_count; c++)
- {
- drm_crtc_t* restrict crtc = crtcs + c;
- if (drm_get_gamma(crtc) < 0)
- return -1;
- gamma_digit(crtc, 1, id < 10 ? 10 : (id / 10) % 10);
- gamma_digit(crtc, 8, (id / 1) % 10);
- id++;
- if (drm_set_gamma(crtc) < 0)
- return -1;
- }
- return 0;
-}
-
-
-/**
- * Draw squares used as reference when tweeking the gamma correction
- */
-void draw_gamma(void)
-{
- size_t f;
- uint32_t x, y;
- for (f = 0; f < framebuffer_count; f++)
- {
- framebuffer_t* restrict fb = framebuffers + f;
- for (x = 0; x < 4; x++)
- {
- int r = (x == 1) || (x == 0);
- int g = (x == 2) || (x == 0);
- int b = (x == 3) || (x == 0);
- uint32_t background = fb_colour(128 * r, 128 * g, 128 * b);
- uint32_t average = fb_colour(188 * r, 188 * g, 188 * b);
- uint32_t high = fb_colour(255 * r, 255 * g, 255 * b);
- uint32_t low = fb_colour(0, 0, 0);
- uint32_t xoff = x * fb->width / 4;
- fb_fill_rectangle(fb, background, xoff, 0, fb->width / 4, fb->height);
- xoff += (fb->width / 4 - 200) / 2;
- fb_fill_rectangle(fb, high, xoff, 40, 200, 200);
- fb_fill_rectangle(fb, average, xoff + 50, 40, 100, 200);
- fb_fill_rectangle(fb, average, xoff, 280, 200, 200);
- for (y = 0; y < 200; y += 2)
- {
- fb_draw_horizontal_line(fb, high, xoff + 50, 280 + y + 0, 100);
- fb_draw_horizontal_line(fb, low , xoff + 50, 280 + y + 1, 100);
- }
- fb_fill_rectangle(fb, average, xoff, 520, 200, 200);
- fb_fill_rectangle(fb, high, xoff + 50, 520, 100, 200);
- }
- }
-}
-
-
-/**
- * Print a pattern on the screen that can be used when
- * calibrating the convergence
- */
-void draw_convergence(void)
-{
- uint32_t black = fb_colour(0, 0, 0);
- uint32_t white = fb_colour(255, 255, 255);
- uint32_t x, y;
- size_t f;
- for (f = 0; f < framebuffer_count; f++)
- {
- framebuffer_t* restrict fb = framebuffers + f;
- fb_fill_rectangle(fb, black, 0, 0, fb->width, fb->height);
- for (y = 0; y <= fb->height; y += 16)
- {
- if (y == fb->height)
- y = fb->height - 1;
- for (x = 0; x <= fb->width; x += 16)
- {
- if (x == fb->height)
- x = fb->height - 1;
- fb_draw_pixel(fb, white, x, y);
- }
- }
- }
-}
-
-
-/**
- * Print a pattern on the screen that can be used when
- * calibrating the moiré cancellation
- *
- * @param gap The horizontal and vertical gap, in pixels, between the dots
- * @param diagonal Whether to draw dots in a diagonal pattern
- */
-void draw_moire(uint32_t gap, int diagonal)
-{
- uint32_t black = fb_colour(0, 0, 0);
- uint32_t white = fb_colour(255, 255, 255);
- uint32_t x, y, gap2 = gap << 1;
- size_t f;
- gap += (uint32_t)(!diagonal);
- if (diagonal)
- for (f = 0; f < framebuffer_count; f++)
- {
- framebuffer_t* restrict fb = framebuffers + f;
- fb_fill_rectangle(fb, black, 0, 0, fb->width, fb->height);
- for (y = 0; y < fb->height; y += gap)
- for (x = (y % gap2); x < fb->width; x += gap2)
- fb_draw_pixel(fb, white, x, y);
- }
- else
- for (f = 0; f < framebuffer_count; f++)
- {
- framebuffer_t* restrict fb = framebuffers + f;
- fb_fill_rectangle(fb, black, 0, 0, fb->width, fb->height);
- for (y = 0; y < fb->height; y += gap)
- for (x = 0; x < fb->width; x += gap)
- fb_draw_pixel(fb, white, x, y);
- }
-}
-
-
-/**
- * Analyse the monitors calibrations
- *
- * @return Zero on success, -1 on error
- */
-int read_calibs(void)
-{
- size_t c;
- for (c = 0; c < crtc_count; c++)
- {
- if (drm_get_gamma(crtcs + c) < 0)
- return -1;
-
- gamma_analyse(crtcs[c].gamma_stops, crtcs[c].red, gammas[0] + c,
- contrasts[0] + c, brightnesses[0] + c);
- gamma_analyse(crtcs[c].gamma_stops, crtcs[c].green, gammas[1] + c,
- contrasts[1] + c, brightnesses[1] + c);
- gamma_analyse(crtcs[c].gamma_stops, crtcs[c].blue, gammas[2] + c,
- contrasts[2] + c, brightnesses[2] + c);
- }
- return 0;
-}
-
-
-/**
- * Apply the selected calibrations to the monitors
- *
- * @return Zero on success, -1 on error
- */
-int apply_calibs(void)
-{
- size_t c;
- for (c = 0; c < crtc_count; c++)
- {
- gamma_generate(crtcs[c].gamma_stops, crtcs[c].red, gammas[0][c],
- contrasts[0][c], brightnesses[0][c]);
- gamma_generate(crtcs[c].gamma_stops, crtcs[c].green, gammas[1][c],
- contrasts[1][c], brightnesses[1][c]);
- gamma_generate(crtcs[c].gamma_stops, crtcs[c].blue, gammas[2][c],
- contrasts[2][c], brightnesses[2][c]);
-
- if (drm_set_gamma(crtcs + c) < 0)
- return -1;
- }
- return 0;
-}
-
-
-/**
- * Print calibrations into a file
- *
- * @param f The file
- * @return Zero on success, -1 on error
- */
-int save_calibs(FILE* f)
-{
- size_t c;
- for (c = 0; c < crtc_count; c++)
- {
- if (fprintf(f, "# index = %lu\n",
- c) < 0)
- return -1;
-
- if (fprintf(f, "edid = %s\n",
- crtcs[c].edid) < 0)
- return -1;
-
- if (fprintf(f, "brightness = %f:%f:%f\n",
- brightnesses[0][c],
- brightnesses[1][c],
- brightnesses[2][c]) < 0)
- return -1;
-
- if (fprintf(f, "contrast = %f:%f:%f\n",
- contrasts[0][c],
- contrasts[1][c],
- contrasts[2][c]) < 0)
- return -1;
-
- if (fprintf(f, "gamma = %f:%f:%f\n\n",
- gammas[0][c],
- gammas[1][c],
- gammas[2][c]) < 0)
- return -1;
- }
- return 0;
-}
-
-
-int main(int argc, char* argv[])
-{
- FILE* output_file = stdout;
- int tty_configured = 0, rc = 0, in_fork = 0;
- struct termios saved_stty;
- struct termios stty;
- pid_t pid;
-
- if ((argc > 2) || ((argc == 2) && (argv[1][0] == '-')))
- {
- printf("USAGE: %s [output-file]\n", *argv);
- return 0;
- }
-
- if ((acquire_video() < 0) ||
- (tcgetattr(STDIN_FILENO, &saved_stty) < 0) ||
- (tcgetattr(STDIN_FILENO, &stty) < 0))
- goto fail;
-
- stty.c_lflag &= (tcflag_t)~(ICANON | ECHO);
- if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &stty) < 0)
- goto fail;
- tty_configured = 1;
-
- printf("\033[?25l");
- fflush(stdout);
-
- pid = fork();
- if ((pid != (pid_t)-1) && (pid != 0))
- {
- int status;
- retry:
- if (waitpid(pid, &status, 0) != (pid_t)-1)
- rc = !!status;
- else
- {
- if (errno != EINTR)
- perror(*argv);
- goto retry;
- }
- goto done;
- }
- else if (pid == 0)
- in_fork = 1;
-
- printf("\033[H\033[2J");
- printf("Please deactivate any program that dynamically\n");
- printf("applies filters to your monitors' colours\n");
- printf("and remove any existing filters.\n");
- printf("In doubt, you probably do not have any.\n");
- printf("Do not try to calibrate CRT monitors will\n");
- printf("they are cold.\n");
- printf("\n");
- printf("You will be presented with an image on each\n");
- printf("monitor. Please use the control panel on your\n");
- printf("to calibrate the contrast and brightness of\n");
- printf("each monitor. The contrasts adjusts the\n");
- printf("brightness of bright colours, and the\n");
- printf("brightness adjusts the brightness of dim\n");
- printf("colours. All rectangles are of equals size\n");
- printf("and they should be distrint from eachother.\n");
- printf("There should only be a slight difference\n");
- printf("between the two darkest colours for each\n");
- printf("colour. The grey colour does not need to\n");
- printf("be perfectly grey but should be close.\n");
- printf("The brightness should be as high as\n");
- printf("possible without the first square being\n");
- printf("any other colour than black or the two first\n");
- printf("square being too distinct from eachother. The\n");
- printf("contrast should be as high as possible without\n");
- printf("causing distortion.\n");
- printf("\n");
- printf("Press ENTER to continue, and ENTER again when\n");
- printf("your are done.\n");
- fflush(stdout);
-
- while (getchar() != 10)
- ;
-
- printf("\033[H\033[2J");
- fflush(stdout);
- draw_contrast_brightness();
-
- while (getchar() != 10)
- ;
-
- printf("\033[H\033[2J");
- printf("An index will be displayed on each monitor.\n");
- printf("It behoves you to memorise them. They will\n");
- printf("be used in the output when descibing the\n");
- printf("calibrations, and is the index of the monitors\n");
- printf("that are used when changing monitor to\n");
- printf("calibrate.\n");
- printf("\n");
- printf("Press ENTER to continue, and ENTER again when\n");
- printf("your are done.\n");
- fflush(stdout);
-
- while (getchar() != 10)
- ;
-
- printf("\033[H\033[2J");
- fflush(stdout);
- if ((read_calibs() < 0) || (draw_id() < 0))
- goto fail;
-
- while (getchar() != 10)
- ;
-
- if (apply_calibs() < 0)
- goto fail;
-
- printf("\033[H\033[2J");
- printf("You will not be given the opportunity to.\n");
- printf("calibrate your monitors' brightness and\n");
- printf("contrast using software incase your monitors\n");
- printf("could not be sufficiently calibrated using\n");
- printf("hardware.\n");
- printf("\n");
- printf("<Left> and <right> is used to change which\n");
- printf("monitor to calibrate. <Left> switches to the\n");
- printf("previous monitor (one lower in index) and\n");
- printf("<right> switches to the next monitor (one\n");
- printf("higher in index.)\n");
- printf("<Up> and <down> is used to increase and\n");
- printf("descrease the settings. respectively.\n");
- printf("<Shift+b> is used to switch to changing the.\n");
- printf("monitor's brightness and <shift+c> switches\n");
- printf("to contrast.\n");
- printf("<r> is used to switch to changing the red.\n");
- printf("channel, <g> switches to the green channel,\n");
- printf("<b> switches to the blue channel, and <a>\n");
- printf("is used to switch to change all channels.\n");
- printf("\n");
- printf("Press ENTER to continue, and ENTER again when\n");
- printf("your are done.\n");
- fflush(stdout);
-
- while (getchar() != 10)
- ;
-
- printf("\033[H\033[2J");
- fflush(stdout);
- draw_contrast_brightness();
-
- {
- int c, b = 0, at_contrast = 0;
- int red = 1, green = 1, blue = 1;
- size_t mon = 0;
- while ((c = getchar()) != 10)
- {
- if (b)
- {
- b = 0;
- if ((c == 'A') && at_contrast)
- {
- contrasts[0][mon] += (double)red / 100;
- contrasts[1][mon] += (double)green / 100;
- contrasts[2][mon] += (double)blue / 100;
- }
- else if (c == 'A')
- {
- brightnesses[0][mon] += (double)red / 100;
- brightnesses[1][mon] += (double)green / 100;
- brightnesses[2][mon] += (double)blue / 100;
- }
- else if ((c == 'B') && at_contrast)
- {
- contrasts[0][mon] -= (double)red / 100;
- contrasts[1][mon] -= (double)green / 100;
- contrasts[2][mon] -= (double)blue / 100;
- }
- else if (c == 'B')
- {
- brightnesses[0][mon] -= (double)red / 100;
- brightnesses[1][mon] -= (double)green / 100;
- brightnesses[2][mon] -= (double)blue / 100;
- }
- else if (c == 'C')
- mon = (mon + 1) % crtc_count;
- else if (c == 'D')
- mon = (mon == 0 ? crtc_count : mon) - 1;
-
- if ((c == 'A') || (c == 'B'))
- apply_calibs();
- }
- else if (c == '[') b = 1;
- else if (c == 'B') at_contrast = 0;
- else if (c == 'C') at_contrast = 1;
- else if (c == 'r') red = 1, green = 0, blue = 0;
- else if (c == 'g') red = 0, green = 1, blue = 0;
- else if (c == 'b') red = 0, green = 0, blue = 1;
- else if (c == 'a') red = 1, green = 1, blue = 1;
- }
- }
-
- printf("\033[H\033[2J");
- printf("You will now be presented with squares used\n");
- printf("to calibrate the gamma correction. There will\n");
- printf("be four stacks: grey, red, green and blue.\n");
- printf("Each stack has three squares: the upper square\n");
- printf("shows the characterics of how the middle square\n");
- printf("will look if the gamma is too high, and the\n");
- printf("lower shows how the middile will look if the\n");
- printf("gamma is too low. The middle square should\n");
- printf("look like it is one single colour if the gamma\n");
- printf("correction is configured correctly. You may\n");
- printf("have to look from a distance or not focus\n");
- printf("your eyes on the squares to compensate for\n");
- printf("the fact that there actually multiple colours\n");
- printf("is the square.\n");
- printf("The grey should look perfectly grey when you\n");
- printf("are done.\n");
- printf("\n");
- printf("<Left> and <right> is used to change which\n");
- printf("monitor to calibrate. <Left> switches to the\n");
- printf("previous monitor (one lower in index) and\n");
- printf("<right> switches to the next monitor (one\n");
- printf("higher in index.)\n");
- printf("<Up> and <down> is used to increase and\n");
- printf("descrease the gamma. respectively.\n");
- printf("<r> is used to switch to changing the red.\n");
- printf("channel, <g> switches to the green channel,\n");
- printf("<b> switches to the blue channel, and <a>\n");
- printf("is used to switch to change all channels.\n");
- printf("\n");
- printf("Press ENTER to continue, and ENTER again when\n");
- printf("your are done.\n");
- fflush(stdout);
-
- while (getchar() != 10)
- ;
-
- printf("\033[H\033[2J");
- fflush(stdout);
- draw_gamma();
-
- {
- int c, b = 0;
- int red = 1, green = 1, blue = 1;
- size_t mon = 0;
- while ((c = getchar()) != 10)
- {
- if (b)
- {
- b = 0;
- if (c == 'A')
- {
- gammas[0][mon] += (double)red / 100;
- gammas[1][mon] += (double)green / 100;
- gammas[2][mon] += (double)blue / 100;
- }
- else if (c == 'B')
- {
- gammas[0][mon] -= (double)red / 100;
- gammas[1][mon] -= (double)green / 100;
- gammas[2][mon] -= (double)blue / 100;
- if (gammas[0][mon] < 0) gammas[0][mon] = 0;
- if (gammas[1][mon] < 0) gammas[1][mon] = 0;
- if (gammas[2][mon] < 0) gammas[2][mon] = 0;
- }
- else if (c == 'C')
- mon = (mon + 1) % crtc_count;
- else if (c == 'D')
- mon = (mon == 0 ? crtc_count : mon) - 1;
-
- if ((c == 'A') || (c == 'B'))
- apply_calibs();
- }
- else if (c == '[') b = 1;
- else if (c == 'r') red = 1, green = 0, blue = 0;
- else if (c == 'g') red = 0, green = 1, blue = 0;
- else if (c == 'b') red = 0, green = 0, blue = 1;
- else if (c == 'a') red = 1, green = 1, blue = 1;
- }
- }
-
- printf("\033[H\033[2J");
- printf("The next step is to calibrate the monitors'\n");
- printf("convergence settings using the monitors'\n");
- printf("control panel. White dots will be printed on the\n");
- printf("screens, you should try to get as many as\n");
- printf("possible of them to appear as pure white dots\n");
- printf("rather than dots splitted in the red, green and\n");
- printf("blue dots. On most CRT monitors this is not\n");
- printf("possible to get all corners perfect.\n");
- printf("\n");
- printf("Press ENTER to continue, and ENTER again when\n");
- printf("your are done.\n");
- fflush(stdout);
-
- while (getchar() != 10)
- ;
-
- printf("\033[H\033[2J");
- fflush(stdout);
- draw_convergence();
-
- while (getchar() != 10)
- ;
-
- printf("\033[H\033[2J");
- printf("The final step is to calbirate the monitors' moiré\n");
- printf("cancellation. This too is done on the using the\n");
- printf("monitors' control panel.\n");
- printf("\n");
- printf("You can use <d> and the arrow keys to change the\n");
- printf("dot-pattern on the screens.\n");
- printf("\n");
- printf("Press ENTER to continue, and ENTER again when\n");
- printf("your are done.\n");
- fflush(stdout);
-
- while (getchar() != 10)
- ;
-
- printf("\033[H\033[2J");
- fflush(stdout);
- draw_moire(1, 1);
-
- {
- int c, b = 0, d = 1;
- uint32_t gap = 1;
- while ((c = getchar()) != 10)
- {
- if (b)
- {
- b = 0;
- if ((c == 'A') || (c == 'C'))
- draw_moire(++gap, d);
- else if ((c == 'B') || (c == 'D'))
- {
- if (--gap == 0)
- gap = 1;
- draw_moire(gap, d);
- }
- }
- else if (c == '[')
- b = 1;
- else if (c == 'd')
- draw_moire(gap, d ^= 1);
- }
- }
-
- printf("\033[H\033[2J");
- fflush(stdout);
-
- if (argc == 2)
- {
- output_file = fopen(argv[1], "w");
- if (output_file == NULL)
- goto fail;
- }
-
- if (save_calibs(output_file) < 0)
- goto fail;
- fflush(output_file);
-
- if (argc == 2)
- {
- if (fclose(output_file))
- goto fail;
- }
-
- done:
- if (in_fork == 0)
- {
- release_video();
- if (tty_configured)
- tcsetattr(STDIN_FILENO, TCSAFLUSH, &saved_stty);
- printf("\033[?25h");
- fflush(stdout);
- }
- return rc;
- fail:
- perror(*argv);
- rc = 1;
- goto done;
-}
-
diff --git a/src/calibrator.h b/src/calibrator.h
deleted file mode 100644
index 7b823db..0000000
--- a/src/calibrator.h
+++ /dev/null
@@ -1,108 +0,0 @@
-/**
- * crt-calibrator – Calibration utility for CRT monitors
- * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#ifndef CRT_CALIBRATOR_CALIBRATOR_H
-#define CRT_CALIBRATOR_CALIBRATOR_H
-
-
-#include "framebuffer.h"
-#include "drmgamma.h"
-
-#include <stdint.h>
-#include <stddef.h>
-#include <stdio.h>
-
-
-/**
- * Draw bars in different shades of grey, red, green and blue
- * used for calibrating the contrast and brightness
- */
-void draw_contrast_brightness(void);
-
-/**
- * Draw a seven segment display
- *
- * @param fb The framebuffer to draw on
- * @param colour The intensity of the least intense colour to use
- * @param x The X component of the top left corner of the seven segment display
- * @param y The Y component of the top left corner of the seven segment display
- */
-void draw_digit(framebuffer_t* restrict fb, int colour, uint32_t x, uint32_t y);
-
-/**
- * Manipulate a CRT controllers gamma ramps to display a specific digit
- * for one of the seven segment display on only that CRT controller's
- * monitors
- *
- * @param crtc The CRT controller information
- * @param colour The intensity of the least intense colour in the seven segment display
- * @param value The valud of the digit to display
- */
-void gamma_digit(drm_crtc_t* restrict crtc, int colour, size_t value);
-
-/**
- * Draw an unique index on each monitor
- *
- * @return Zero on success, -1 on error
- */
-int draw_id(void);
-
-/**
- * Draw squares used as reference when tweeking the gamma correction
- */
-void draw_gamma(void);
-
-/**
- * Print a pattern on the screen that can be used when
- * calibrating the convergence
- */
-void draw_convergence(void);
-
-/**
- * Print a pattern on the screen that can be used when
- * calibrating the moiré cancellation
- *
- * @param gap The horizontal and vertical gap, in pixels, between the dots
- * @param diagonal Whether to draw dots in a diagonal pattern
- */
-void draw_moire(uint32_t gap, int diagonal);
-
-/**
- * Analyse the monitors calibrations
- *
- * @return Zero on success, -1 on error
- */
-int read_calibs(void);
-
-/**
- * Apply the selected calibrations to the monitors
- *
- * @return Zero on success, -1 on error
- */
-int apply_calibs(void);
-
-/**
- * Print calibrations into a file
- *
- * @param f The file
- * @return Zero on success, -1 on error
- */
-int save_calibs(FILE* f);
-
-
-#endif
-
diff --git a/src/drmgamma.c b/src/drmgamma.c
deleted file mode 100644
index 8f3dd97..0000000
--- a/src/drmgamma.c
+++ /dev/null
@@ -1,283 +0,0 @@
-/**
- * crt-calibrator – Calibration utility for CRT monitors
- * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#include "drmgamma.h"
-
-#include <unistd.h>
-#include <errno.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <string.h>
-
-
-
-/**
- * The number of elements to allocates to a buffer for a DRM device pathname
- */
-#define DRM_DEV_NAME_MAX_LEN \
- ((sizeof(DRM_DEV_NAME) + sizeof(DRM_DIR_NAME)) / sizeof(char) + 3 * sizeof(int))
-
-
-
-/**
- * Figure out how many graphics cards there are on the system
- *
- * @return The number of graphics cards on the system
- */
-size_t drm_card_count(void)
-{
- char buf[DRM_DEV_NAME_MAX_LEN];
- size_t count = 0;
-
- for (;; count++)
- {
- sprintf(buf, DRM_DEV_NAME, DRM_DIR_NAME, (int)count);
- if (access(buf, F_OK) < 0)
- return count;
- }
-}
-
-/**
- * Acquire access to a graphics card
- *
- * @param index The index of the graphics card
- * @param card Graphics card information to fill in
- * @return Zero on success, -1 on error
- */
-int drm_card_open(size_t index, drm_card_t* restrict card)
-{
- char buf[DRM_DEV_NAME_MAX_LEN];
- int old_errno;
- size_t i, n;
-
- card->fd = -1;
- card->res = NULL;
- card->connectors = NULL;
- card->encoders = NULL;
- card->connector_count = 0;
-
- sprintf(buf, DRM_DEV_NAME, DRM_DIR_NAME, (int)index);
- card->fd = open(buf, O_RDWR);
- if (card->fd == -1)
- goto fail;
-
- card->res = drmModeGetResources(card->fd);
- if (card->res == NULL)
- goto fail;
-
- card->crtc_count = (size_t)(card->res->count_crtcs);
- card->connector_count = (size_t)(card->res->count_connectors);
- n = card->connector_count;
-
- card->connectors = calloc(n, sizeof(drmModeConnector*));
- if (card->connectors == NULL)
- goto fail;
- card->encoders = calloc(n, sizeof(drmModeEncoder*));
- if (card->encoders == NULL)
- goto fail;
-
- for (i = 0; i < n; i++)
- {
- card->connectors[i] = drmModeGetConnector(card->fd, card->res->connectors[i]);
- if (card->connectors[i] == NULL)
- goto fail;
-
- if (card->connectors[i]->encoder_id != 0)
- {
- card->encoders[i] = drmModeGetEncoder(card->fd, card->connectors[i]->encoder_id);
- if (card->encoders[i] == NULL)
- goto fail;
- }
- }
-
- return 0;
- fail:
- old_errno = errno;
- drm_card_close(card);
- errno = old_errno;
- return -1;
-}
-
-
-/**
- * Release access to a graphics card
- *
- * @param card The graphics card information
- */
-void drm_card_close(drm_card_t* restrict card)
-{
- size_t i, n = card->connector_count;
-
- if (card->encoders != NULL)
- for (i = 0; i < n; i++)
- if (card->encoders[i] != NULL)
- drmModeFreeEncoder(card->encoders[i]);
- free(card->encoders), card->encoders = NULL;
-
- if (card->connectors != NULL)
- for (i = 0; i < n; i++)
- if (card->connectors[i] != NULL)
- drmModeFreeConnector(card->connectors[i]);
- free(card->connectors), card->connectors = NULL;
-
- if (card->res != NULL)
- drmModeFreeResources(card->res), card->res = NULL;
- if (card->fd != -1)
- close(card->fd), card->fd = -1;
-}
-
-
-/**
- * Acquire access to a CRT controller
- *
- * @param index The index of the CRT controller
- * @param card The graphics card information
- * @param crtc CRT controller information to fill in
- * @return Zero on success, -1 on error
- */
-int drm_crtc_open(size_t index, drm_card_t* restrict card, drm_crtc_t* restrict crtc)
-{
- drmModePropertyRes* restrict prop;
- drmModePropertyBlobRes* restrict blob;
- drmModeCrtc* restrict info;
- size_t i;
- int old_errno;
-
- crtc->edid = NULL;
- crtc->red = NULL;
- crtc->green = NULL;
- crtc->blue = NULL;
-
- crtc->id = card->res->crtcs[index];
- crtc->card = card;
-
- crtc->connector = NULL;
- crtc->encoder = NULL;
- for (i = 0; i < card->connector_count; i++)
- if (card->encoders[i] != NULL)
- if (card->encoders[i]->crtc_id == crtc->id)
- {
- crtc->connector = card->connectors[i];
- crtc->encoder = card->encoders[i];
- }
-
- crtc->connected = (crtc->connector != NULL) && (crtc->connector->connection == DRM_MODE_CONNECTED);
-
- info = drmModeGetCrtc(card->fd, crtc->id);
- if (info == NULL)
- return -1;
- crtc->gamma_stops = (size_t)(info->gamma_size);
- drmModeFreeCrtc(info);
-
- /* `calloc` is for some reason required when reading the gamma ramps. */
- crtc->red = calloc(3 * crtc->gamma_stops, sizeof(uint16_t));
- if (crtc->red == NULL)
- return -1;
- crtc->green = crtc->red + crtc->gamma_stops;
- crtc->blue = crtc->green + crtc->gamma_stops;
-
- if (crtc->connector == NULL)
- return 0;
- for (i = 0; i < (size_t)(crtc->connector->count_props); i++)
- {
- size_t j;
-
- prop = drmModeGetProperty(card->fd, crtc->connector->props[i]);
- if (prop == NULL)
- continue;
-
- if (strcmp(prop->name, "EDID"))
- goto free_prop;
-
-
- blob = drmModeGetPropertyBlob(card->fd, (uint32_t)(crtc->connector->prop_values[i]));
- i = (size_t)(crtc->connector->count_props);
- if ((blob == NULL) || (blob->data == NULL))
- goto free_blob;
-
- crtc->edid = malloc((blob->length * 2 + 1) * sizeof(char));
- if (crtc->edid == NULL)
- {
- old_errno = errno;
- drmModeFreePropertyBlob(blob);
- drmModeFreeProperty(prop);
- free(crtc->red), crtc->red = NULL;
- errno = old_errno;
- return -1;
- }
- for (j = 0; j < blob->length; j++)
- {
- unsigned char c = ((unsigned char*)(blob->data))[j];
- crtc->edid[j * 2 + 0] = "0123456789ABCDEF"[(c >> 4) & 15];
- crtc->edid[j * 2 + 1] = "0123456789ABCDEF"[(c >> 0) & 15];
- }
- crtc->edid[blob->length * 2] = '\0';
-
- free_blob:
- if (blob != NULL)
- drmModeFreePropertyBlob(blob);
-
- free_prop:
- drmModeFreeProperty(prop);
- }
-
- return 0;
-}
-
-
-/**
- * Release access to a CRT controller
- *
- * @param crtc The CRT controller information to fill in
- */
-void drm_crtc_close(drm_crtc_t* restrict crtc)
-{
- free(crtc->edid), crtc->edid = NULL;
- free(crtc->red), crtc->red = NULL;
-}
-
-
-/**
- * Read the gamma ramps for a CRT controller
- *
- * @param crtc CRT controller information
- * @return Zero on success, -1 on error
- */
-int drm_get_gamma(drm_crtc_t* restrict crtc)
-{
- int r;
- r = drmModeCrtcGetGamma(crtc->card->fd, crtc->id, (uint32_t)(crtc->gamma_stops),
- crtc->red, crtc->green, crtc->blue);
- return -!!r;
-}
-
-
-/**
- * Apply gamma ramps for a CRT controller
- *
- * @param crtc CRT controller information
- * @return Zero on success, -1 on error
- */
-int drm_set_gamma(drm_crtc_t* restrict crtc)
-{
- int r;
- r = drmModeCrtcSetGamma(crtc->card->fd, crtc->id, (uint32_t)(crtc->gamma_stops),
- crtc->red, crtc->green, crtc->blue);
- return -!!r;
-}
-
diff --git a/src/drmgamma.h b/src/drmgamma.h
deleted file mode 100644
index e82159d..0000000
--- a/src/drmgamma.h
+++ /dev/null
@@ -1,182 +0,0 @@
-/**
- * crt-calibrator – Calibration utility for CRT monitors
- * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#ifndef CRT_CALIBRATOR_DRMGAMMA_H
-#define CRT_CALIBRATOR_DRMGAMMA_H
-
-
-#include <xf86drm.h>
-#include <xf86drmMode.h>
-
-
-/**
- * Graphics card information
- */
-typedef struct drm_card
-{
- /**
- * File descriptor for the connection to the graphics card,
- * -1 if not opened
- */
- int fd;
-
- /**
- * The graphics card's mode resources, `NULL` if not acquired
- */
- drmModeRes* restrict res;
-
- /**
- * The number of CRTC:s available on the graphics card
- */
- size_t crtc_count;
-
- /**
- * The available connectors
- */
- drmModeConnector** restrict connectors;
-
- /**
- * The available encoders
- */
- drmModeEncoder** restrict encoders;
-
- /**
- * The number of connectors and encoders
- */
- size_t connector_count;
-
-} drm_card_t;
-
-
-/**
- * CRT controller information
- */
-typedef struct drm_crtc
-{
- /**
- * CRT controller identifier
- */
- uint32_t id;
-
- /**
- * The graphics card
- */
- drm_card_t* restrict card;
-
- /**
- * The CRT controller's connector
- */
- drmModeConnector* restrict connector;
-
- /**
- * The CRT controller's encoder
- */
- drmModeEncoder* restrict encoder;
-
- /**
- * Whether the connector is connected
- */
- int connected;
-
- /**
- * The CRT's EDID, hexadecimally encoded
- */
- char* restrict edid;
-
- /**
- * The number of stops on the gamma ramps
- */
- size_t gamma_stops;
-
- /**
- * The gamma ramp for the red channel
- */
- uint16_t* restrict red;
-
- /**
- * The gamma ramp for the green channel
- */
- uint16_t* restrict green;
-
- /**
- * The gamma ramp for the blue channel
- */
- uint16_t* restrict blue;
-
-} drm_crtc_t;
-
-
-
-/**
- * Figure out how many graphics cards there are on the system
- *
- * @return The number of graphics cards on the system
- */
-size_t drm_card_count(void);
-
-/**
- * Acquire access to a graphics card
- *
- * @param index The index of the graphics card
- * @param card Graphics card information to fill in
- * @return Zero on success, -1 on error
- */
-int drm_card_open(size_t index, drm_card_t* restrict card);
-
-/**
- * Release access to a graphics card
- *
- * @param card The graphics card information
- */
-void drm_card_close(drm_card_t* restrict card);
-
-/**
- * Acquire access to a CRT controller
- *
- * @param index The index of the CRT controller
- * @param card The graphics card information
- * @param crtc CRT controller information to fill in
- * @return Zero on success, -1 on error
- */
-int drm_crtc_open(size_t index, drm_card_t* restrict card, drm_crtc_t* restrict crtc);
-
-/**
- * Release access to a CRT controller
- *
- * @param crtc The CRT controller information to fill in
- */
-void drm_crtc_close(drm_crtc_t* restrict crtc);
-
-/**
- * Read the gamma ramps for a CRT controller
- *
- * @param crtc CRT controller information
- * @return Zero on success, -1 on error
- */
-int drm_get_gamma(drm_crtc_t* restrict crtc);
-
-/**
- * Apply gamma ramps for a CRT controller
- *
- * @param crtc CRT controller information
- * @return Zero on success, -1 on error
- */
-int drm_set_gamma(drm_crtc_t* restrict crtc);
-
-
-#endif
-
diff --git a/src/framebuffer.c b/src/framebuffer.c
deleted file mode 100644
index 55964d2..0000000
--- a/src/framebuffer.c
+++ /dev/null
@@ -1,215 +0,0 @@
-/**
- * crt-calibrator – Calibration utility for CRT monitors
- * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#include "framebuffer.h"
-
-#include <unistd.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <sys/mman.h>
-#include <stropts.h>
-#include <linux/fb.h>
-#include <errno.h>
-
-
-/**
- * The psuedodevice pathname pattern used to access a framebuffer
- */
-#ifndef FB_DEVICE_PATTERN
-# define FB_DEVICE_PATTERN "/dev/fb%lu"
-#endif
-
-
-/**
- * The number of elements to allocates to a buffer for a framebuffer device pathname
- */
-#define FB_DEVICE_MAX_LEN (sizeof(FB_DEVICE_PATTERN) / sizeof(char) + 3 * sizeof(size_t))
-
-
-
-/**
- * Figure out how many framebuffers there are on the system
- *
- * @return The number of framebuffers on the system
- */
-size_t fb_count(void)
-{
- char buf[FB_DEVICE_MAX_LEN];
- size_t count = 0;
-
- for (;; count++)
- {
- sprintf(buf, FB_DEVICE_PATTERN, count);
- if (access(buf, F_OK) < 0)
- return count;
- }
-}
-
-
-/**
- * Open a framebuffer
- *
- * @param index The index of the framebuffer to open
- * @param fb Framebuffer information to fill in
- * @return Zero on success, -1 on error
- */
-int fb_open(size_t index, framebuffer_t* restrict fb)
-{
- char buf[FB_DEVICE_MAX_LEN];
- struct fb_fix_screeninfo fix_info;
- struct fb_var_screeninfo var_info;
- int old_errno;
-
- fb->fd = -1;
- fb->mem = MAP_FAILED;
-
- sprintf(buf, FB_DEVICE_PATTERN, index);
- fb->fd = open(buf, O_RDWR);
- if (fb->fd == -1)
- goto fail;
-
- if (ioctl(fb->fd, (unsigned long int)FBIOGET_FSCREENINFO, &fix_info) ||
- ioctl(fb->fd, (unsigned long int)FBIOGET_VSCREENINFO, &var_info))
- goto fail;
-
- fb->mem = mmap(NULL, (size_t)(fix_info.smem_len), PROT_WRITE, MAP_SHARED, fb->fd, (off_t)0);
- if (fb->mem == MAP_FAILED)
- goto fail;
-
- fb->mem += var_info.xoffset * (var_info.bits_per_pixel / 8);
- fb->mem += var_info.yoffset * fix_info.line_length;
-
- fb->width = var_info.xres;
- fb->height = var_info.yres;
- fb->bytes_per_pixel = var_info.bits_per_pixel / 8;
- fb->line_length = fix_info.line_length;
-
- return 0;
- fail:
- old_errno = errno;
- fb_close(fb);
- errno = old_errno;
- return -1;
-}
-
-
-/**
- * Close a framebuffer
- *
- * @param fb The framebuffer information
- */
-void fb_close(framebuffer_t* restrict fb)
-{
- if (fb->fd != -1)
- close(fb->fd), fb->fd = -1;
-}
-
-
-/**
- * Construct an sRGB colour in 32-bit XRGB encoding to
- * use when specifying colours
- *
- * @param red The red component from [0, 255] sRGB
- * @param green The green component from [0, 255] sRGB
- * @param blue The blue component from [0, 255] sRGB
- * @return The colour as one 32-bit integer
- */
-uint32_t fb_colour(int red, int green, int blue)
-{
- uint32_t rc = 0;
- rc |= (uint32_t)red, rc <<= 8;
- rc |= (uint32_t)green, rc <<= 8;
- rc |= (uint32_t)blue;
- return rc;
-}
-
-
-/**
- * Print a filled in rectangle to a framebuffer
- *
- * @param fb The framebuffer
- * @param colour The colour to use when drawing the rectangle
- * @param x The starting pixel on the X axis for the rectangle
- * @param y The starting pixel on the Y axis for the rectangle
- * @param width The width of the rectangle, in pixels
- * @param height The height of the rectangle, in pixels
- */
-void fb_fill_rectangle(framebuffer_t* restrict fb, uint32_t colour,
- uint32_t x, uint32_t y, uint32_t width, uint32_t height)
-{
- int8_t* mem = fb->mem + y * fb->line_length;
- size_t x1 = x * fb->bytes_per_pixel;
- size_t x2 = (x + width) * fb->bytes_per_pixel;
- size_t y2 = y + height;
- size_t x_, y_;
-
- for (y_ = y; y_ != y2; y_++, mem += fb->line_length)
- for (x_ = x1; x_ != x2; x_ += fb->bytes_per_pixel)
- {
- int8_t* pixel = mem + x_;
- *(uint32_t*)pixel = colour;
- }
-}
-
-
-/**
- * Draw a horizontal line segment on a framebuffer
- *
- * @param fb The framebuffer
- * @param colour The colour to use when drawing the rectangle
- * @param x The starting pixel on the X axis for the line segment
- * @param y The starting pixel on the Y axis for the line segment
- * @param length The length of the line segment, in pixels
- */
-void fb_draw_horizontal_line(framebuffer_t* restrict fb, uint32_t colour,
- uint32_t x, uint32_t y, uint32_t length)
-{
- int8_t* mem = fb->mem + y * fb->line_length;
- size_t x1 = x * fb->bytes_per_pixel;
- size_t x2 = (x + length) * fb->bytes_per_pixel;
- size_t x_;
-
- for (x_ = x1; x_ != x2; x_ += fb->bytes_per_pixel)
- {
- int8_t* pixel = mem + x_;
- *(uint32_t*)pixel = colour;
- }
-}
-
-
-/**
- * Draw a vertical line segment on a framebuffer
- *
- * @param fb The framebuffer
- * @param colour The colour to use when drawing the rectangle
- * @param x The starting pixel on the X axis for the line segment
- * @param y The starting pixel on the Y axis for the line segment
- * @param length The length of the line segment, in pixels
- */
-void fb_draw_vertical_line(framebuffer_t* restrict fb, uint32_t colour,
- uint32_t x, uint32_t y, uint32_t length)
-{
- int8_t* mem = fb->mem + y * fb->line_length + x * fb->bytes_per_pixel;
- size_t y2 = y + length;
- size_t y_;
-
- for (y_ = y; y_ != y2; y_++, mem += fb->line_length)
- *(uint32_t*)mem = colour;
-}
-
diff --git a/src/framebuffer.h b/src/framebuffer.h
deleted file mode 100644
index 11102ff..0000000
--- a/src/framebuffer.h
+++ /dev/null
@@ -1,154 +0,0 @@
-/**
- * crt-calibrator – Calibration utility for CRT monitors
- * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#ifndef CRT_CALIBRATOR_FRAMEBUFFER_H
-#define CRT_CALIBRATOR_FRAMEBUFFER_H
-
-
-#include <stddef.h>
-#include <stdint.h>
-
-
-/**
- * Framebuffer information
- */
-typedef struct framebuffer
-{
- /**
- * The file descriptor used to access the framebuffer, -1 if not opened
- */
- int fd;
-
- /**
- * The width of the display in pixels
- */
- uint32_t width;
-
- /**
- * The height of the display in pixels
- */
- uint32_t height;
-
- /**
- * Increment for `mem` to move to next pixel on the line
- */
- uint32_t bytes_per_pixel;
-
- /**
- * Increment for `mem` to move down one line but stay in the same column
- */
- uint32_t line_length;
-
- /**
- * Framebuffer pointer, `MAP_FAILED` (from <sys/mman.h>) if not mapped
- */
- int8_t* mem;
-
-} framebuffer_t;
-
-
-/**
- * Figure out how many framebuffers there are on the system
- *
- * @return The number of framebuffers on the system
- */
-size_t fb_count(void);
-
-/**
- * Open a framebuffer
- *
- * @param index The index of the framebuffer to open
- * @param fb Framebuffer information to fill in
- * @return Zero on success, -1 on error
- */
-int fb_open(size_t index, framebuffer_t* restrict fb);
-
-/**
- * Close a framebuffer
- *
- * @param fb The framebuffer information
- */
-void fb_close(framebuffer_t* restrict fb);
-
-/**
- * Construct an sRGB colour in 32-bit XRGB encoding to
- * use when specifying colours
- *
- * @param red The red component from [0, 255] sRGB
- * @param green The green component from [0, 255] sRGB
- * @param blue The blue component from [0, 255] sRGB
- * @return The colour as one 32-bit integer
- */
-uint32_t fb_colour(int red, int green, int blue) __attribute__((const));
-
-/**
- * Print a filled in rectangle to a framebuffer
- *
- * @param fb The framebuffer
- * @param colour The colour to use when drawing the rectangle
- * @param x The starting pixel on the X axis for the rectangle
- * @param y The starting pixel on the Y axis for the rectangle
- * @param width The width of the rectangle, in pixels
- * @param height The height of the rectangle, in pixels
- */
-void fb_fill_rectangle(framebuffer_t* restrict fb, uint32_t colour,
- uint32_t x, uint32_t y, uint32_t width, uint32_t height);
-
-/**
- * Draw a horizontal line segment on a framebuffer
- *
- * @param fb The framebuffer
- * @param colour The colour to use when drawing the rectangle
- * @param x The starting pixel on the X axis for the line segment
- * @param y The starting pixel on the Y axis for the line segment
- * @param length The length of the line segment, in pixels
- */
-void fb_draw_horizontal_line(framebuffer_t* restrict fb, uint32_t colour,
- uint32_t x, uint32_t y, uint32_t length);
-
-/**
- * Draw a vertical line segment on a framebuffer
- *
- * @param fb The framebuffer
- * @param colour The colour to use when drawing the rectangle
- * @param x The starting pixel on the X axis for the line segment
- * @param y The starting pixel on the Y axis for the line segment
- * @param length The length of the line segment, in pixels
- */
-void fb_draw_vertical_line(framebuffer_t* restrict fb, uint32_t colour,
- uint32_t x, uint32_t y, uint32_t length);
-
-
-/**
- * Draw a single on a framebuffer
- *
- * @param fb The framebuffer
- * @param colour The colour to use when drawing the rectangle
- * @param x The pixel's position on the X axis
- * @param y The pixel's position on the Y axis
- */
-static inline void fb_draw_pixel(framebuffer_t* restrict fb, uint32_t colour,
- uint32_t x, uint32_t y)
-{
- int8_t* mem = fb->mem + y * fb->line_length + x * fb->bytes_per_pixel;
- *(uint32_t*)mem = colour;
-}
-
-
-
-#endif
-
diff --git a/src/gamma.c b/src/gamma.c
deleted file mode 100644
index 79a50f7..0000000
--- a/src/gamma.c
+++ /dev/null
@@ -1,79 +0,0 @@
-/**
- * crt-calibrator – Calibration utility for CRT monitors
- * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#include "gamma.h"
-
-#include <math.h>
-
-
-/**
- * Analyse a gamma ramp
- *
- * @param stops The number of stops in the gamma ramp
- * @param ramp The gamma ramp
- * @param gamma Output parameter for the gamma
- * @param contrast Output parameter for the contrast
- * @param brightness Output parameter for the brightness
- */
-void gamma_analyse(size_t stops, const uint16_t* restrict ramp, double* restrict gamma,
- double* restrict contrast, double* restrict brightness)
-{
- double min, middle, max;
- *brightness = min = (double)(ramp[0]) / (double)0xFFFF;
- *contrast = max = (double)(ramp[stops - 1]) / (double)0xFFFF;
- middle = (double)(ramp[stops / 2]) / (double)0xFFFF;
-
- if (stops % 2 == 0)
- {
- middle += (double)(ramp[stops / 2 - 1]) / (double)0xFFFF;
- middle /= (double)2;
- }
-
- middle = (middle - min) / (max - min);
- *gamma = -log((double)2) / log(middle);
-}
-
-
-/**
- * Generate a gamma ramp
- *
- * @param stops The number of stops in the gamma ramp
- * @param ramp Memory area to where to write the gamma ramp
- * @param gamma The gamma
- * @param contrast The contrast
- * @param brightness The brightness
- */
-void gamma_generate(size_t stops, uint16_t* restrict ramp, double gamma,
- double contrast, double brightness)
-{
- double diff = contrast - brightness;
- double gamma_ = (double)1 / gamma;
- size_t i;
- int32_t y;
- double y_;
-
- for (i = 0; i < stops; i++)
- {
- y_ = (double)i / (double)stops;
- y_ = pow(y_, gamma_) * diff + brightness;
- y = (int32_t)(y_ * 0xFFFF);
- if (y < 0x0000) y = 0x0000;
- if (y > 0xFFFF) y = 0xFFFF;
- ramp[i] = (uint16_t)y;
- }
-}
-
diff --git a/src/gamma.h b/src/gamma.h
deleted file mode 100644
index 9652598..0000000
--- a/src/gamma.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/**
- * crt-calibrator – Calibration utility for CRT monitors
- * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#ifndef CRT_CALIBRATOR_GAMMA_H
-#define CRT_CALIBRATOR_GAMMA_H
-
-
-#include <stddef.h>
-#include <stdint.h>
-
-
-/**
- * Analyse a gamma ramp
- *
- * @param stops The number of stops in the gamma ramp
- * @param ramp The gamma ramp
- * @param gamma Output parameter for the gamma
- * @param contrast Output parameter for the contrast
- * @param brightness Output parameter for the brightness
- */
-void gamma_analyse(size_t stops, const uint16_t* restrict ramp, double* restrict gamma,
- double* restrict contrast, double* restrict brightness);
-
-/**
- * Generate a gamma ramp
- *
- * @param stops The number of stops in the gamma ramp
- * @param ramp Memory area to where to write the gamma ramp
- * @param gamma The gamma
- * @param contrast The contrast
- * @param brightness The brightness
- */
-void gamma_generate(size_t stops, uint16_t* restrict ramp, double gamma,
- double contrast, double brightness);
-
-
-#endif
-
diff --git a/src/state.c b/src/state.c
deleted file mode 100644
index b4ec11a..0000000
--- a/src/state.c
+++ /dev/null
@@ -1,172 +0,0 @@
-/**
- * crt-calibrator – Calibration utility for CRT monitors
- * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#include "state.h"
-
-#include <stdlib.h>
-
-
-/**
- * The framebuffers on the system
- */
-framebuffer_t* restrict framebuffers = NULL;
-
-/**
- * The number of elements in `framebuffers`
- */
-size_t framebuffer_count = 0;
-
-/**
- * The graphics cards on the system
- */
-drm_card_t* restrict cards = NULL;
-
-/**
- * The number of elements in `cards`
- */
-size_t card_count = 0;
-
-/**
- * The connected CRT controllers on the system
- */
-drm_crtc_t* restrict crtcs = NULL;
-
-/**
- * The software brightness setting on each connected CRT controller, on each channel
- */
-double* restrict brightnesses[3];
-
-/**
- * The software contrast setting on each connected CRT controller, on each channel
- */
-double* restrict contrasts[3];
-
-/**
- * The gamma correction on each connected CRT controller, on each channel
- */
-double* restrict gammas[3];
-
-/**
- * The number of elements in `crtcs`, `brightnesses[]`, `contrasts[]` and `gammas[]`
- */
-size_t crtc_count = 0;
-
-
-
-/**
- * Acquire video control
- *
- * @return Zero on success, -1 on error
- */
-int acquire_video(void)
-{
- size_t f, c, i, fn = fb_count(), cn = drm_card_count();
- drm_crtc_t* restrict old_crtcs;
-
- framebuffers = malloc(fn * sizeof(framebuffer_t));
- if (framebuffers == NULL)
- return -1;
-
- for (f = 0; f < fn; f++)
- {
- framebuffer_t fb;
- if (fb_open(f, &fb) < 0)
- return -1;
- framebuffers[framebuffer_count++] = fb;
- }
-
- cards = malloc(cn * sizeof(drm_card_t));
- if (cards == NULL)
- return -1;
-
- for (c = 0; c < cn; c++)
- {
- drm_card_t card;
- if (drm_card_open(c, &card) < 0)
- return -1;
- cards[card_count++] = card;
-
- old_crtcs = crtcs;
- crtcs = realloc(crtcs, (crtc_count + card.crtc_count) * sizeof(drm_crtc_t));
- if (crtcs == NULL)
- {
- crtcs = old_crtcs;
- return -1;
- }
-
- for (i = 0; i < card.crtc_count; i++)
- {
- drm_crtc_t crtc;
- if (drm_crtc_open(i, cards + c, &crtc) < 0)
- return -1;
- if (crtc.connected)
- crtcs[crtc_count++] = crtc;
- else
- drm_crtc_close(&crtc);
- }
- }
-
- for (c = 0; c < 3; c++)
- {
- brightnesses[c] = malloc(crtc_count * sizeof(double));
- if (brightnesses[c] == NULL)
- return -1;
-
- contrasts[c] = malloc(crtc_count * sizeof(double));
- if (contrasts[c] == NULL)
- return -1;
-
- gammas[c] = malloc(crtc_count * sizeof(double));
- if (gammas[c] == NULL)
- return -1;
- }
-
- return 0;
-}
-
-
-/**
- * Release video control
- */
-void release_video(void)
-{
- size_t i;
-
- for (i = 0; i < crtc_count; i++)
- drm_crtc_close(crtcs + i);
- crtc_count = 0;
-
- for (i = 0; i < card_count; i++)
- drm_card_close(cards + i);
- card_count = 0;
-
- for (i = 0; i < framebuffer_count; i++)
- fb_close(framebuffers + i);
- framebuffer_count = 0;
-
- for (i = 0; i < 3; i++)
- {
- free(brightnesses[i]), brightnesses[i] = NULL;
- free(contrasts[i]), contrasts[i] = NULL;
- free(gammas[i]), gammas[i] = NULL;
- }
-
- free(crtcs), crtcs = NULL;
- free(cards), cards = NULL;
- free(framebuffers), framebuffers = NULL;
-}
-
diff --git a/src/state.h b/src/state.h
deleted file mode 100644
index da4a580..0000000
--- a/src/state.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/**
- * crt-calibrator – Calibration utility for CRT monitors
- * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#ifndef CRT_CALIBRATOR_STATE_H
-#define CRT_CALIBRATOR_STATE_H
-
-
-#include "framebuffer.h"
-#include "drmgamma.h"
-
-#include <stddef.h>
-
-
-/**
- * The framebuffers on the system
- */
-extern framebuffer_t* restrict framebuffers;
-
-/**
- * The number of elements in `framebuffers`
- */
-extern size_t framebuffer_count;
-
-/**
- * The graphics cards on the system
- */
-extern drm_card_t* restrict cards;
-
-/**
- * The number of elements in `cards`
- */
-extern size_t card_count;
-
-/**
- * The connected CRT controllers on the system
- */
-extern drm_crtc_t* restrict crtcs;
-
-/**
- * The software brightness setting on each connected CRT controller, on each channel
- */
-extern double* restrict brightnesses[3];
-
-/**
- * The software contrast setting on each connected CRT controller, on each channel
- */
-extern double* restrict contrasts[3];
-
-/**
- * The gamma correction on each connected CRT controller, on each channel
- */
-extern double* restrict gammas[3];
-
-/**
- * The number of elements in `crtcs`, `brightnesses[]`, `contrasts[]` and `gammas[]`
- */
-extern size_t crtc_count;
-
-
-
-/**
- * Acquire video control
- *
- * @return Zero on success, -1 on error
- */
-int acquire_video(void);
-
-/**
- * Release video control
- */
-void release_video(void);
-
-
-#endif
-
diff --git a/state.c b/state.c
new file mode 100644
index 0000000..4e7b00d
--- /dev/null
+++ b/state.c
@@ -0,0 +1,144 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * The framebuffers on the system
+ */
+framebuffer_t *restrict framebuffers = NULL;
+
+/**
+ * The number of elements in `framebuffers`
+ */
+size_t framebuffer_count = 0;
+
+/**
+ * The graphics cards on the system
+ */
+drm_card_t *restrict cards = NULL;
+
+/**
+ * The number of elements in `cards`
+ */
+size_t card_count = 0;
+
+/**
+ * The connected CRT controllers on the system
+ */
+drm_crtc_t *restrict crtcs = NULL;
+
+/**
+ * The software brightness setting on each connected CRT controller, on each channel
+ */
+double *restrict brightnesses[3];
+
+/**
+ * The software contrast setting on each connected CRT controller, on each channel
+ */
+double *restrict contrasts[3];
+
+/**
+ * The gamma correction on each connected CRT controller, on each channel
+ */
+double *restrict gammas[3];
+
+/**
+ * The number of elements in `crtcs`, `brightnesses[]`, `contrasts[]` and `gammas[]`
+ */
+size_t crtc_count = 0;
+
+
+
+/**
+ * Acquire video control
+ *
+ * @return Zero on success, -1 on error
+ */
+int
+acquire_video(void)
+{
+ size_t f, c, i, fn = fb_count(), cn = drm_card_count();
+ drm_crtc_t *restrict old_crtcs, crtc;
+ drm_card_t card;
+ framebuffer_t fb;
+
+ framebuffers = malloc(fn * sizeof(framebuffer_t));
+ if (!framebuffers)
+ return -1;
+
+ for (f = 0; f < fn; f++) {
+ if (fb_open(f, &fb) < 0)
+ return -1;
+ framebuffers[framebuffer_count++] = fb;
+ }
+
+ cards = malloc(cn * sizeof(drm_card_t));
+ if (!cards)
+ return -1;
+
+ for (c = 0; c < cn; c++) {
+ if (drm_card_open(c, &card) < 0)
+ return -1;
+ cards[card_count++] = card;
+
+ old_crtcs = crtcs;
+ crtcs = realloc(crtcs, (crtc_count + card.crtc_count) * sizeof(drm_crtc_t));
+ if (!crtcs) {
+ crtcs = old_crtcs;
+ return -1;
+ }
+
+ for (i = 0; i < card.crtc_count; i++) {
+ if (drm_crtc_open(i, cards + c, &crtc) < 0)
+ return -1;
+ if (crtc.connected)
+ crtcs[crtc_count++] = crtc;
+ else
+ drm_crtc_close(&crtc);
+ }
+ }
+
+ for (c = 0; c < 3; c++) {
+ brightnesses[c] = malloc(crtc_count * sizeof(double));
+ if (!brightnesses[c])
+ return -1;
+ contrasts[c] = malloc(crtc_count * sizeof(double));
+ if (!contrasts[c])
+ return -1;
+ gammas[c] = malloc(crtc_count * sizeof(double));
+ if (!gammas[c])
+ return -1;
+ }
+
+ return 0;
+}
+
+
+/**
+ * Release video control
+ */
+void
+release_video(void)
+{
+ size_t i;
+ while (crtc_count)
+ drm_crtc_close(&crtcs[--crtc_count]);
+ while (card_count)
+ drm_card_close(&cards[--card_count]);
+ while (framebuffer_count)
+ fb_close(&framebuffers[--framebuffer_count]);
+ for (i = 0; i < 3; i++) {
+ free(brightnesses[i]);
+ free(contrasts[i]);
+ free(gammas[i]);
+ brightnesses[i] = NULL;
+ contrasts[i] = NULL;
+ gammas[i] = NULL;
+ }
+ free(crtcs);
+ free(cards);
+ free(framebuffers);
+ crtcs = NULL;
+ cards = NULL;
+ framebuffers = NULL;
+}