gfx.c

#include "gfx.h"
#include <pspge.h>
#include <pspdisplay.h>
#include <psputils.h>

uint32_t* draw_buffer;
uint32_t* disp_buffer;

void GFX_init(){
    draw_buffer = sceGeEdramGetAddr();
    disp_buffer = (uint32_t*)sceGeEdramGetAddr() + (271 * 512 * sizeof(uint32_t));

    sceDisplaySetMode(0, 480, 272);
    sceDisplaySetFrameBuf(disp_buffer, 512, PSP_DISPLAY_PIXEL_FORMAT_8888, 1); 
}

void GFX_clear(uint32_t color){
    for(int i = 0; i < 512 * 272; i++){
        draw_buffer[i] = color;
    }
}

void GFX_swap_buffers(){
    uint32_t* temp = disp_buffer;
    disp_buffer = draw_buffer;
    draw_buffer = temp;

    sceKernelDcacheWritebackInvalidateAll();
    sceDisplaySetFrameBuf(disp_buffer, 512, PSP_DISPLAY_PIXEL_FORMAT_8888, PSP_DISPLAY_SETBUF_NEXTFRAME);
}

void GFX_draw_rect(unsigned int x, unsigned int y, unsigned int w, unsigned int h, uint32_t color){
    if (x > 480){
        x = 480;
    }
    if (y > 272){
        y = 272;
    }

    if (x + w > 480){
        w = 480 - x;
    }

    if (y + h > 272){
        h = 272 - y;
    }

    int off = x + (y * 512);
    for (int y1 = 0; y1 < h; y1++){
        for (int x1 = 0; x1 < w; x1++){
            draw_buffer[x1 + off + y1 * 512] = color;
        }
    }
}