pxl8/src/pxl8_blit.c

#include "pxl8_blit.h"

void pxl8_blit_hicolor(u16* fb, u32 fb_width, const u16* sprite, u32 atlas_width,
                       i32 x, i32 y, u32 w, u32 h) {
    u16* dest_base = fb + y * fb_width + x;
    const u16* src_base = sprite;

    for (u32 row = 0; row < h; row++) {
        u16* dest_row = dest_base + row * fb_width;
        const u16* src_row = src_base + row * atlas_width;

        for (u32 col = 0; col < w; col++) {
            if (src_row[col] != 0) {
                dest_row[col] = src_row[col];
            }
        }
    }
}

void pxl8_blit_indexed(u8* fb, u32 fb_width, const u8* sprite, u32 atlas_width,
                       i32 x, i32 y, u32 w, u32 h) {
    u8* dest_base = fb + y * fb_width + x;
    const u8* src_base = sprite;

    for (u32 row = 0; row < h; row++) {
        u8* dest_row = dest_base + row * fb_width;
        const u8* src_row = src_base + row * atlas_width;

        for (u32 col = 0; col < w; col++) {
            if (src_row[col] != 0) {
                dest_row[col] = src_row[col];
            }
        }
    }
}