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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 /src/framebuffer.c
parentupdate dist (diff)
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misc + change license + remove info manual1.3.2
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to 'src/framebuffer.c')
-rw-r--r--src/framebuffer.c215
1 files changed, 0 insertions, 215 deletions
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;
-}
-