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r300g: fix texturing with non-3D textures and wrap R mode set to sample border

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If the wrap R (3rd) mode is set to CLAMP or CLAMP_TO_BORDER and the texture
isn't 3D, r300 always samples the border color regardless of texture
coordinates.

I HATE THIS HARDWARE.

NOTE: This is a candidate for the 7.10 branch.
This commit is contained in:
Marek Olšák 2011-06-09 04:09:40 +02:00
parent 466ce95ddf
commit da8b4c0798
1 changed files with 6 additions and 0 deletions
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6
src/gallium/drivers/r300/r300_state_derived.c
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@ -854,6 +854,12 @@ static void r300_merge_textures_and_samplers(struct r300_context* r300)
texstate->filter0 |= R300_TX_WRAP_T(R300_TX_CLAMP_TO_EDGE);
}
/* The hardware doesn't like CLAMP and CLAMP_TO_BORDER
* for the 3rd coordinate if the texture isn't 3D. */
if (tex->b.b.b.target != PIPE_TEXTURE_3D) {
texstate->filter0 &= ~R300_TX_WRAP_R_MASK;
}
if (tex->tex.is_npot) {
/* NPOT textures don't support mip filter, unfortunately.
* This prevents incorrect rendering. */