st/mesa: fix trimming of GL_QUAD_STRIP
We sometimes convert GL_QUAD_STRIP prims into GL_TRIANGLE_STRIP, but that changes the results of the u_trim_pipe_prim() call. We need to pass the original primitive type to the trim function. Note that OpenGL's GL_x prim type values match Gallium's PIPE_PRIM_x values. Fixes a failure in the new piglit degenerate-prims test. Note: This is a candidate for the stable branches. Reviewed-by: José Fonseca <jfonseca@vmware.com>
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@ -283,7 +283,7 @@ st_draw_vbo(struct gl_context *ctx,
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/* don't trim, restarts might be inside index list */
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cso_draw_vbo(st->cso_context, &info);
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}
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else if (u_trim_pipe_prim(info.mode, &info.count))
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else if (u_trim_pipe_prim(prims[i].mode, &info.count))
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cso_draw_vbo(st->cso_context, &info);
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}
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