Method CopyToBlock

source/common/textures/formats/multipatchtexture.cpp:155–196

//==========================================================================

void FMultiPatchTexture::CopyToBlock(uint8_t *dest, int dwidth, int dheight, FImageSource *source, int xpos, int ypos, int rotate, const uint8_t *translation, int style)
{
	auto cimage = source->GetCachedPalettedPixels(style);	// should use composition cache
	auto &image = cimage.Pixels;
	const uint8_t *pixels = image.Data();
	int srcwidth = source->GetWidth();
	int srcheight = source->GetHeight();
	int step_x = source->GetHeight();
	int step_y = 1;
	FClipRect cr = { 0, 0, dwidth, dheight };
	if (style) translation = nullptr;	// do not apply translations to alpha textures.

	if (ClipCopyPixelRect(&cr, xpos, ypos, pixels, srcwidth, srcheight, step_x, step_y, rotate))
	{
		dest += ypos + dheight * xpos;
		if (translation == NULL)
		{
			for (int x = 0; x < srcwidth; x++)
			{
				int pos = x * dheight;
				for (int y = 0; y < srcheight; y++, pos++)
				{
					// the optimizer is doing a good enough job here so there's no need to optimize this by hand
					uint8_t v = pixels[y * step_y + x * step_x];
					if (v != 0) dest[pos] = v;
				}
			}
		}
		else
		{
			for (int x = 0; x < srcwidth; x++)
			{
				int pos = x * dheight;
				for (int y = 0; y < srcheight; y++, pos++)
				{
					uint8_t v = pixels[y * step_y + x * step_x];
					if (v != 0) dest[pos] = translation[v];
				}
			}
		}
	}
}

//==========================================================================
//