Function FlattenTexture

Source/Graphics/PngUtil.cpp:195–223

Utility function to flatten a native texture into an array of NativePf8888 values. Should live elsewhere, but need to share WritePngRow.

// Utility function to flatten a native texture into an array of NativePf8888 values.
// Should live elsewhere, but need to share WritePngRow.
void FlattenTexture(const CNativeTexture * texture, void * dst, size_t len)
{
	const u8 *           p       = reinterpret_cast< const u8 * >( texture->GetData() );
	const NativePf8888 * pal8888 = reinterpret_cast< const NativePf8888 * >( texture->GetPalette() );

	u32 width  = texture->GetWidth();
	u32 height = texture->GetHeight();
	u32 pitch  = texture->GetStride();

#ifdef DAEDALUS_ENABLE_ASSERTS
	DAEDALUS_ASSERT(len == width * sizeof(NativePf8888) * height, "Unexpected number of bytes.");
#endif
	u8 * line = static_cast<u8 *>( dst );
	for ( u32 y = 0; y < height; y++ )
	{
		switch (texture->GetFormat())
		{
		case TexFmt_5650:		WritePngRow< NativePf5650 >( line, p, width );	break;
		case TexFmt_5551:		WritePngRow< NativePf5551 >( line, p, width );	break;
		case TexFmt_4444:		WritePngRow< NativePf4444 >( line, p, width );	break;
		case TexFmt_8888:		WritePngRow< NativePf8888 >( line, p, width );	break;
		case TexFmt_CI4_8888:	WritePngRowPal4( line, p, width, pal8888 );		break;
		case TexFmt_CI8_8888:	WritePngRowPal8( line, p, width, pal8888 );		break;
		}

		p    += pitch;
		line += width * sizeof(NativePf8888);
	}
}