Created attachment 121015 [details] the correct behavior should be red background of the whole graph view I'm using cairo-gl libarary to render graph with custom animation on android TextureView. 1). I want to render a graph with transparent(i means the whole textureView should be transparent, the view under textureView should be seen), is there any good solutions? 2). I find a work round, use "cairo_surface_map_to_image" before i render graph to capture the backgound image and use "cairo_surface_unmap_image" to show the background before i start animation for every frame drawing.But, unfortunately, this doesn't work for OS after 5.x, i will get a whole black background image, is there anything wrong for "cairo_surface_map_to_image" and "cairo_surface_unmap_image" in latest OS version? Add attachment pic with the black background. the correct behavior should be red background of the whole graph view.
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