gfx.h

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#pragma once
 
#include <stdint.h>

 
#define GFX_W 176  
#define GFX_H 176  
 
typedef uint16_t gfx_color_t;   

static inline gfx_color_t gfx_rgb(uint8_t r, uint8_t g, uint8_t b)
{
    return (gfx_color_t)(((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3));
}
 
#define GFX_BLACK ((gfx_color_t)0x0000)  
#define GFX_WHITE ((gfx_color_t)0xFFFF)  
 
/* Built-in 5x7 font, drawn in a 6x8 cell (1px gap). Multiply by scale for size. */
#define GFX_CHAR_W 6  
#define GFX_CHAR_H 8  

void gfx_clear(gfx_color_t color);

void gfx_pixel(int x, int y, gfx_color_t color);

void gfx_fill_rect(int x, int y, int w, int h, gfx_color_t color);

void gfx_draw_rect(int x, int y, int w, int h, gfx_color_t color);

void gfx_draw_text(int x, int y, const char *s, gfx_color_t color, int scale);

void gfx_blit_1bpp(int x, int y, int w, int h, const uint8_t *bitmap, gfx_color_t color);

void gfx_flush(void);

const gfx_color_t *gfx_buffer(void);