Method CopyTextureIntoAtlas

trinity/Tr2TextureAtlas.cpp:1036–1077

}

bool Tr2TextureAtlas::CopyTextureIntoAtlas( Tr2AtlasTexture* tex )
{
	CCP_STATS_ZONE( __FUNCTION__ );

	USE_MAIN_THREAD_RENDER_CONTEXT();

	if( !m_texture.IsValid() || !tex || !tex->GetTexture() )
	{
		// assuming that RTs don't use this, seems nonsensical
		CCP_LOGERR( "CopyTextureIntoAtlas failed, target or source textures invalid" );
		return false;
	}

	const auto& r = tex->m_atlasArea->rect;

	if( !m_margin )
	{
		Tr2TextureSubresource dest( 0, 0 );
		dest.m_box.left = r.left;
		dest.m_box.top = r.top;
		return SUCCEEDED( m_texture.CopySubresourceRegion( dest, *tex->GetTexture(), Tr2TextureSubresource( 0, 0 ), renderContext ) );
	}

	if( m_hasMipMaps )
	{
		m_dirtyMipRegions.push_back( r );
	}

	const void* srcData = nullptr;
	unsigned srcPitch = 0;
	CR_RETURN_VAL( tex->GetTexture()->MapForReading( Tr2TextureSubresource( 0 ), srcData, srcPitch, renderContext ), false );
	ON_BLOCK_EXIT( [&] { tex->GetTexture()->UnmapForReading( renderContext ); } );

	std::vector<unsigned char> pixels;
	unsigned pitch = 0;
	Tr2ImageIOHelpers::AddMargin( m_texture.GetFormat(), (const unsigned char*)srcData, tex->GetWidth(), tex->GetHeight(), m_margin, pixels, pitch );

	// Area may be larger than texture due to alignment
	uint32_t right = r.left + tex->GetWidth() + 2 * m_margin;
	uint32_t bottom = r.top + tex->GetHeight() + 2 * m_margin;
	return SUCCEEDED( m_texture.UpdateSubresource( Tr2TextureSubresource( 0 ).SetRect( r.left, r.top, right, bottom ), &pixels[0], pitch, 0, renderContext ) );
}

ALResult Tr2TextureAtlas::CreateTexture( unsigned int width, unsigned int height, AtlasTextureType type, Tr2AtlasTexture** result )
{