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Diffstat (limited to 'src/framebuffer.h')
| -rw-r--r-- | src/framebuffer.h | 154 |
1 files changed, 0 insertions, 154 deletions
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 - |