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ab74fee5e1
I don't see how this could have ever worked right. The screen-space interpolation code uses the vertex->data[pos_attr] position which contain window coords. But window coords are only computed for the unclipped vertices; the clipped vertices have undefined window coords (see draw_cliptest_tmp.h). Use the vertex clip coords instead which are always defined. Fixes http://bugs.freedesktop.org/show_bug.cgi?id=55476 (piglit fbo-blit-stretch failure on softpipe) Note: This is a candidate for the 9.0 branch. Reviewed-by: José Fonseca <jfonseca@vmware.com> |
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