st/nine: Implement TEXCOORD special behaviours

Graphics / Mesa 3D Graphics Library / Mesa - Axel Davy [ens.fr] - 22 January 2015 16:16 UTC

texcoord for ps < 1_4 should clamp between 0 and 1 the values.

texcrd (texcoord ps 1_4) does not clamp and can be used with two modifiers _dw and _dz that means the channels are divided by w or z. Implement those in shared code, since the same modifiers can be used for texld ps 1_4.

v2: replace DIV by RCP + MUL
v3: Remove an useless MOV

5399119 st/nine: Implement TEXCOORD special behaviours
src/gallium/state_trackers/nine/nine_shader.c | 31 +++++++++++++++++++++----
1 file changed, 26 insertions(+), 5 deletions(-)

Upstream: cgit.freedesktop.org

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