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gallium: introduce GLSL based interpolation rules. (v2)

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This introduces an unspecified interpolation paramter that is only allowed for
color semantics, so a specified GLSL interpolation will override the ShadeModel
specified interpolation, but not vice-versa.

This fixes a lot of the interpolation tests in piglit.

v2: rename from unspecified to color

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2012-01-09 15:57:02 +00:00
parent 5a7c343352
commit 67e3cbf163
7 changed files with 19 additions and 6 deletions
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src/mesa/state_tracker/st_program.c
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@@ -441,7 +441,7 @@ st_translate_interp(enum glsl_interp_qualifier glsl_qual, bool is_color)
switch (glsl_qual) {
case INTERP_QUALIFIER_NONE:
if (is_color)
return TGSI_INTERPOLATE_LINEAR;
return TGSI_INTERPOLATE_COLOR;
return TGSI_INTERPOLATE_PERSPECTIVE;
case INTERP_QUALIFIER_SMOOTH:
return TGSI_INTERPOLATE_PERSPECTIVE;