Method CreateTexture

trinity/Tr2TextureAtlas.cpp:1079–1164

}

ALResult Tr2TextureAtlas::CreateTexture( unsigned int width, unsigned int height, AtlasTextureType type, Tr2AtlasTexture** result )
{
	Tr2AtlasTexturePtr tex;
	tex.CreateInstance();
	tex->m_textureAtlas = this;

	Tr2TextureAtlasArea* area = NULL;

	if( type == ATT_DEFAULT && !IsLargeTexture( width, height ) )
	{
		area = GetFreeArea( width + m_margin * 2, height + m_margin * 2 );

		if( !area && m_optimizationWarranted )
		{
			CollapseFreeAreas();
			area = GetFreeArea( width + m_margin * 2, height + m_margin * 2 );
		}
	}

	if( area )
	{
		area->type = Tr2TextureAtlasArea::IN_USE;
		area->tex = tex;
		tex->m_atlasArea = area;

		// Set up the texture window into the atlas
		tex->m_renderTarget = nullptr;
		tex->m_x = area->rect.left + m_margin;
		tex->m_y = area->rect.top + m_margin;
		tex->m_width = width;
		tex->m_height = height;
		tex->m_textureWidth = m_width;
		tex->m_textureHeight = m_height;

		RegisterInsider( tex );
		PaintEmptyArea( area );
	}
	else if( m_createOutsiders )
	{
		if( !Tr2Renderer::IsResourceCreationAllowed() )
		{
			*result = nullptr;
			return E_DEVICELOST;
		}

		USE_MAIN_THREAD_RENDER_CONTEXT();
		HRESULT hr = tex->m_texture.Create(
									   Tr2BitmapDimensions( width, height, 1, m_format ),
									   Tr2GpuUsage::SHADER_RESOURCE,
									   Tr2CpuUsage::READ | Tr2CpuUsage::WRITE,
									   renderContext )
						 .GetResult();
		if( FAILED( hr ) )
		{
			*result = nullptr;
			return hr;
		}