mesa/st: gl_ClipDistance must be interpolated in 3d space.
That old bug was hidden but the clipper always interpolating in 3d space no matter what it should have been doing. Now that the interpolation has been fixed, the bug shows up. Fixes fdo 51364. Signed-off-by: Olivier Galibert <galibert@pobox.com> Signed-off-by: José Fonseca <jfonseca@vmware.com>
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@ -569,12 +569,12 @@ st_translate_fragment_program(struct st_context *st,
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case FRAG_ATTRIB_CLIP_DIST0:
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input_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
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input_semantic_index[slot] = 0;
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interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
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interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
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break;
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case FRAG_ATTRIB_CLIP_DIST1:
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input_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
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input_semantic_index[slot] = 1;
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interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
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interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
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break;
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/* In most cases, there is nothing special about these
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* inputs, so adopt a convention to use the generic
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