graphics.c File Reference

2D Graphics More...

#include <stdint.h>
#include <malloc.h>
#include <string.h>
#include "display.h"
#include "graphics.h"
#include "font.h"

Defines
#define	__set_pixel(buffer, x, y, color)   (buffer)[(x) + ((y) * __width)] = color
	Macro to set a pixel to a certain color in a buffer.
#define	__get_pixel(buffer, x, y)   (buffer)[(x) + ((y) * __width)]
	Macro to get a pixel color from a buffer.
#define	__get_buffer(x)   __safe_buffer[(x)-1]
	Get the correct video buffer given a display context.
Functions
uint32_t	graphics_make_color (int r, int g, int b, int a)
	Return a 32-bit representation of an RGBA color.
uint32_t	graphics_convert_color (color_t color)
	Convert a color structure to a 32-bit representation of an RGBA color.
void	graphics_set_color (uint32_t forecolor, uint32_t backcolor)
	Set the current forecolor and backcolor for text operations.
void	graphics_draw_pixel (display_context_t disp, int x, int y, uint32_t color)
	Draw a pixel to a given display context.
void	graphics_draw_pixel_trans (display_context_t disp, int x, int y, uint32_t color)
	Draw a pixel to a given display context with alpha support.
void	graphics_draw_line (display_context_t disp, int x0, int y0, int x1, int y1, uint32_t color)
	Draw a line to a given display context.
void	graphics_draw_line_trans (display_context_t disp, int x0, int y0, int x1, int y1, uint32_t color)
	Draw a line to a given display context with alpha support.
void	graphics_draw_box (display_context_t disp, int x, int y, int width, int height, uint32_t color)
	Draw a filled rectangle to a display context.
void	graphics_draw_box_trans (display_context_t disp, int x, int y, int width, int height, uint32_t color)
	Draw a filled rectangle to a display context.
void	graphics_fill_screen (display_context_t disp, uint32_t c)
	Fill the entire screen with a particular color.
void	graphics_draw_character (display_context_t disp, int x, int y, char ch)
	Draw a character to the screen using the built-in font.
void	graphics_draw_text (display_context_t disp, int x, int y, const char *const msg)
	Draw a null terminated string to a display context.
void	graphics_draw_sprite (display_context_t disp, int x, int y, sprite_t *sprite)
	Draw a sprite to a display context.
void	graphics_draw_sprite_stride (display_context_t disp, int x, int y, sprite_t *sprite, int offset)
	Draw a sprite from a spritemap to a display context.
void	graphics_draw_sprite_trans (display_context_t disp, int x, int y, sprite_t *sprite)
	Draw a sprite to a display context with alpha transparency.
void	graphics_draw_sprite_trans_stride (display_context_t disp, int x, int y, sprite_t *sprite, int offset)
	Draw a sprite from a spritemap to a display context.
Variables
uint32_t	__bitdepth
	Currently active bit depth.
uint32_t	__width
	Currently active video width (calculated).
uint32_t	__height
	Currently active video height (calculated).
void *	__safe_buffer []
	Pointer to uncached 16-bit aligned version of buffers.

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Detailed Description

2D Graphics