111 lines
4.7 KiB
C
111 lines
4.7 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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*/
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#pragma once
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#include <stdint.h>
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#include <stddef.h>
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#define GFX_W(ctx) ((ctx)->width) /* Display width */
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#define GFX_H(ctx) ((ctx)->height) /* Display height */
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#define GFX_B(ctx) ((ctx)->depth / 8) /* Display byte depth */
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#define _RED(color) ((color & 0x00FF0000) / 0x10000)
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#define _GRE(color) ((color & 0x0000FF00) / 0x100)
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#define _BLU(color) ((color & 0x000000FF) / 0x1)
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#define _ALP(color) ((color & 0xFF000000) / 0x1000000)
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/*
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* Macros make verything easier.
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*/
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#define GFX(ctx,x,y) *((uint32_t *)&((ctx)->backbuffer)[(GFX_W(ctx) * (y) + (x)) * GFX_B(ctx)])
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#define GFXR(ctx,x,y) *((uint32_t *)&((ctx)->buffer)[(GFX_W(ctx) * (y) + (x)) * GFX_B(ctx)])
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#define SPRITE(sprite,x,y) sprite->bitmap[sprite->width * (y) + (x)]
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#define SMASKS(sprite,x,y) sprite->masks[sprite->width * (y) + (x)]
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typedef struct sprite {
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uint16_t width;
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uint16_t height;
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uint32_t * bitmap;
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uint32_t * masks;
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uint32_t blank;
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uint8_t alpha;
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} sprite_t;
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typedef struct context {
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uint16_t width;
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uint16_t height;
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uint16_t depth;
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uint32_t size;
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char * buffer;
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char * backbuffer;
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char * clips;
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int32_t clips_size;
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} gfx_context_t;
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extern gfx_context_t * init_graphics_fullscreen();
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extern gfx_context_t * init_graphics_fullscreen_double_buffer();
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extern void reinit_graphics_fullscreen(gfx_context_t * ctx);
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#define ALPHA_OPAQUE 0
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#define ALPHA_MASK 1
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#define ALPHA_EMBEDDED 2
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#define ALPHA_INDEXED 3
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#define ALPHA_FORCE_SLOW_EMBEDDED 4
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extern uint32_t rgb(uint8_t r, uint8_t g, uint8_t b);
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extern uint32_t rgba(uint8_t r, uint8_t g, uint8_t b, uint8_t a);
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extern uint32_t alpha_blend(uint32_t bottom, uint32_t top, uint32_t mask);
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extern uint32_t alpha_blend_rgba(uint32_t bottom, uint32_t top);
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extern uint32_t framebuffer_stride(void);
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extern void flip(gfx_context_t * ctx);
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void clear_buffer(gfx_context_t * ctx);
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extern gfx_context_t * init_graphics_sprite(sprite_t * sprite);
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extern sprite_t * create_sprite(size_t width, size_t height, int alpha);
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extern void blur_context(gfx_context_t * _dst, gfx_context_t * _src, double amount);
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extern void blur_context_no_vignette(gfx_context_t * _dst, gfx_context_t * _src, double amount);
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extern void blur_context_box(gfx_context_t * _src, int radius);
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extern void sprite_free(sprite_t * sprite);
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extern void load_sprite(sprite_t * sprite, char * filename);
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//extern int load_sprite_png(sprite_t * sprite, char * file);
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extern void draw_sprite(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y);
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extern void draw_line(gfx_context_t * ctx, int32_t x0, int32_t x1, int32_t y0, int32_t y1, uint32_t color);
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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);
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extern void draw_fill(gfx_context_t * ctx, uint32_t color);
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extern void draw_sprite_scaled(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y, uint16_t width, uint16_t height);
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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);
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extern void draw_sprite_alpha(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y, float alpha);
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extern void draw_sprite_alpha_paint(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y, float alpha, uint32_t c);
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//extern void context_to_png(FILE * file, gfx_context_t * ctx);
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extern uint32_t premultiply(uint32_t color);
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extern void gfx_add_clip(gfx_context_t * ctx, int32_t x, int32_t y, int32_t w, int32_t h);
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extern void gfx_clear_clip(gfx_context_t * ctx);
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extern uint32_t getBilinearFilteredPixelColor(sprite_t * tex, double u, double v);
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extern uint32_t interp_colors(uint32_t bottom, uint32_t top, uint8_t interp);
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extern void draw_rounded_rectangle(gfx_context_t * ctx, int32_t x, int32_t y, uint16_t width, uint16_t height, int radius, uint32_t color);
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extern void draw_rectangle(gfx_context_t * ctx, int32_t x, int32_t y, uint16_t width, uint16_t height, uint32_t color);
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struct gfx_point {
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float x;
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float y;
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};
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extern float gfx_point_distance(struct gfx_point * a, struct gfx_point * b);
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extern float gfx_point_distance_squared(struct gfx_point * a, struct gfx_point * b);
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extern float gfx_point_dot(struct gfx_point * a, struct gfx_point * b);
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extern struct gfx_point gfx_point_sub(struct gfx_point * a, struct gfx_point * b);
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extern struct gfx_point gfx_point_add(struct gfx_point * a, struct gfx_point * b);
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extern float gfx_line_distance(struct gfx_point * p, struct gfx_point * v, struct gfx_point * w);
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extern void draw_line_aa(gfx_context_t * ctx, int x_1, int x_2, int y_1, int y_2, uint32_t color, float thickness);
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extern void draw_sprite_rotate(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y, float rotation, float alpha);
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