69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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*/
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#ifndef LIB_GRAPHICS_H
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#define LIB_GRAPHICS_H
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#include <syscall.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define GFX_W graphics_width /* Display width */
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#define GFX_H graphics_height /* Display height */
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#define GFX_B (graphics_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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/*
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* Macros make verything easier.
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*/
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#define GFX(x,y) *((uint32_t *)&frame_mem[(GFX_W * (y) + (x)) * GFX_B])
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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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DECL_SYSCALL0(getgraphicsaddress);
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DECL_SYSCALL1(kbd_mode, int);
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DECL_SYSCALL0(kbd_get);
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DECL_SYSCALL1(setgraphicsoffset, int);
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DECL_SYSCALL0(getgraphicswidth);
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DECL_SYSCALL0(getgraphicsheight);
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DECL_SYSCALL0(getgraphicsdepth);
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uint16_t graphics_width;
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uint16_t graphics_height;
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uint16_t graphics_depth;
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/* Pointer to graphics memory */
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uint8_t * gfx_mem;
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uint8_t * frame_mem;
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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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void init_graphics();
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void init_graphics_double_buffer();
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uint32_t rgb(uint8_t r, uint8_t g, uint8_t b);
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uint32_t alpha_blend(uint32_t bottom, uint32_t top, uint32_t mask);
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void flip();
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void load_sprite(sprite_t * sprite, char * filename);
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void draw_sprite(sprite_t * sprite, uint16_t x, uint16_t y);
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void draw_line(uint16_t x0, uint16_t x1, uint16_t y0, uint16_t y1, uint32_t color);
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#endif
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