Hi all, I have observed few issues with the rendercheck utility (from X) with the "triangles" use case for operators src, clear, In , out. Using a simple usecase: (with "Src" render operator) ./rendercheck -f r8g8b8 (or a8r8g8b8) -t triangles -o Src --minimalrendering. I am not an expert here, but what I know is, that this test case basically composites 2 triangles (red in color) on a white background and then reads back the value for crosschecking. The test gets the desired red values inside the triangles but outside the triangles it gets black (should be white, as the background window is white). Debugging into the pixman library, I noticed the pixman_composite_trapezoids(). In that, the get_trap_extents() (newly added) is setting the box region (x1, x2, y1, y2) to the whole "dest" width & height, as opposed to setting only the region of interest (trapezoids). This is mainly because of the zero_src_has_no_effect[] array, making the function to set these values. This causes the the background to go black with a red block (trapezoids) on top. (as observed on display) Is this a bug with the way rendercheck (or X) is using the new pixman or the bug is in pixman itself? This issue was not observed with the previous versions. I am not at all sure here. Help appreciated! Thanks.