toaruos/lib/graphics.h
2018-03-01 23:15:37 +09:00

88 lines
3.3 KiB
C

/* vim: tabstop=4 shiftwidth=4 noexpandtab
*/
#pragma once
#include <stdint.h>
#include <stddef.h>
#define GFX_W(ctx) ((ctx)->width) /* Display width */
#define GFX_H(ctx) ((ctx)->height) /* Display height */
#define GFX_B(ctx) ((ctx)->depth / 8) /* Display byte depth */
#define _RED(color) ((color & 0x00FF0000) / 0x10000)
#define _GRE(color) ((color & 0x0000FF00) / 0x100)
#define _BLU(color) ((color & 0x000000FF) / 0x1)
#define _ALP(color) ((color & 0xFF000000) / 0x1000000)
/*
* Macros make verything easier.
*/
#define GFX(ctx,x,y) *((uint32_t *)&((ctx)->backbuffer)[(GFX_W(ctx) * (y) + (x)) * GFX_B(ctx)])
#define GFXR(ctx,x,y) *((uint32_t *)&((ctx)->buffer)[(GFX_W(ctx) * (y) + (x)) * GFX_B(ctx)])
#define SPRITE(sprite,x,y) sprite->bitmap[sprite->width * (y) + (x)]
#define SMASKS(sprite,x,y) sprite->masks[sprite->width * (y) + (x)]
typedef struct sprite {
uint16_t width;
uint16_t height;
uint32_t * bitmap;
uint32_t * masks;
uint32_t blank;
uint8_t alpha;
} sprite_t;
typedef struct context {
uint16_t width;
uint16_t height;
uint16_t depth;
uint32_t size;
char * buffer;
char * backbuffer;
void * clips;
} gfx_context_t;
extern gfx_context_t * init_graphics_fullscreen();
extern gfx_context_t * init_graphics_fullscreen_double_buffer();
extern void reinit_graphics_fullscreen(gfx_context_t * ctx);
#define ALPHA_OPAQUE 0
#define ALPHA_MASK 1
#define ALPHA_EMBEDDED 2
#define ALPHA_INDEXED 3
extern uint32_t rgb(uint8_t r, uint8_t g, uint8_t b);
extern uint32_t rgba(uint8_t r, uint8_t g, uint8_t b, uint8_t a);
extern uint32_t alpha_blend(uint32_t bottom, uint32_t top, uint32_t mask);
extern uint32_t alpha_blend_rgba(uint32_t bottom, uint32_t top);
extern uint32_t framebuffer_stride(void);
extern void flip(gfx_context_t * ctx);
void clear_buffer(gfx_context_t * ctx);
extern gfx_context_t * init_graphics_sprite(sprite_t * sprite);
extern sprite_t * create_sprite(size_t width, size_t height, int alpha);
extern void blur_context(gfx_context_t * _dst, gfx_context_t * _src, double amount);
extern void blur_context_no_vignette(gfx_context_t * _dst, gfx_context_t * _src, double amount);
extern void blur_context_box(gfx_context_t * _src, int radius);
extern void sprite_free(sprite_t * sprite);
extern void load_sprite(sprite_t * sprite, char * filename);
//extern int load_sprite_png(sprite_t * sprite, char * file);
extern void draw_sprite(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y);
extern void draw_line(gfx_context_t * ctx, int32_t x0, int32_t x1, int32_t y0, int32_t y1, uint32_t color);
extern void draw_line_thick(gfx_context_t * ctx, int32_t x0, int32_t x1, int32_t y0, int32_t y1, uint32_t color, char thickness);
extern void draw_fill(gfx_context_t * ctx, uint32_t color);
extern void draw_sprite_scaled(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y, uint16_t width, uint16_t height);
extern void draw_sprite_scaled_alpha(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y, uint16_t width, uint16_t height, float alpha);
extern void draw_sprite_alpha(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y, float alpha);
//extern void context_to_png(FILE * file, gfx_context_t * ctx);
extern uint32_t premultiply(uint32_t color);
extern void gfx_add_clip(gfx_context_t * ctx, int32_t x, int32_t y, int32_t w, int32_t h);
extern void gfx_clear_clip(gfx_context_t * ctx);