void load_texture(C3D_Tex *tex, const u8 *img, const u32 img_size) {
unsigned int width, height;
u8* image;
lodepng_decode32(&image, &width, &height, img, img_size);
u8 *gpusrc = (u8 *) linearAlloc(width * height * 4);
// lodepng outputs big endian rgba so we need to convert
convert_endianess(gpusrc, image, width * height);
// ensure data is in physical ram
GSPGPU_FlushDataCache(gpusrc, width * height * 4);
// Load the texture and bind it to the first texture unit
C3D_TexInit(tex, width, height, GPU_RGBA8);
// Convert image to 3DS tiled texture format
C3D_SyncDisplayTransfer((u32*)gpusrc, GX_BUFFER_DIM(width, height), (u32*) tex->data, GX_BUFFER_DIM(width, height), TEXTURE_TRANSFER_FLAGS);
C3D_TexSetFilter(tex, GPU_LINEAR, GPU_NEAREST);
free(image);
linearFree(gpusrc);
}
void Sprite::render() {
if (dirtyPixels) {
dirtyPixels = false;
GSPGPU_FlushDataCache(pixels, w * h * format.bytesPerPixel);
C3D_SyncDisplayTransfer((u32*)pixels, GX_BUFFER_DIM(w, h), (u32*)texture.data, GX_BUFFER_DIM(w, h), TEXTURE_TRANSFER_FLAGS);
// gspWaitForPPF();
}
C3D_TexBind(0, &texture);
C3D_BufInfo *bufInfo = C3D_GetBufInfo();
BufInfo_Init(bufInfo);
BufInfo_Add(bufInfo, vertices, sizeof(vertex), 2, 0x10);
C3D_DrawArrays(GPU_TRIANGLE_STRIP, 0, 4);
}
