extern void blitScaleToScreen(Image* source, int dx, int dy, float sW, float sH);


void blitScaleToScreen(Image* source, int dx, int dy, float sW, float sH)
{
    if (!initialized) return;

    sceKernelDcacheWritebackInvalidateAll();
    guStart();
    sceGuTexImage(0, source->textureWidth, source->textureHeight, source->textureWidth, (void*) source->data);
    float u = 1.0f / ((float)source->textureWidth);
    float v = 1.0f / ((float)source->textureHeight);
    sceGuTexScale(u, v);

    int j = 0;
    while (j < source->imageWidth) {
        Vertex* vertices = (Vertex*) sceGuGetMemory(2 * sizeof(Vertex));
        int sliceWidth = 64;
        if (j + sliceWidth > source->imageWidth) sliceWidth = source->imageWidth - j;
        vertices[0].u = j;
        vertices[0].v = 0;
        vertices[0].x = dx + j*sW;
        vertices[0].y = dy;
        vertices[0].z = 0;
        vertices[1].u = j + sliceWidth;
        vertices[1].v = source->imageWidth;
        vertices[1].x = dx + j*sW + sliceWidth*sW;
        vertices[1].y = dy + source->imageHeight*sH;
        vertices[1].z = 0;
        sceGuDrawArray(GU_SPRITES, GU_TEXTURE_16BIT | GU_VERTEX_16BIT | GU_TRANSFORM_2D, 2, 0, vertices);
        j += sliceWidth;
    }

    sceGuFinish();
    sceGuSync(0, 0);
}