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nv20: Fix GL_CLAMP

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v2: Force T and R wrap modes to GL_CLAMP_TO_EDGE for 1D textures.
This fixes a regression in tex1d-2dborder.  The test uses a 1D texture
but it provides S and T texture coordinates.  Since the T wrap mode
would (correctly) be set to GL_CLAMP, the texture would gradually
blend (incorrectly) with the border color.

I also tried setting NV20_3D_TEX_FORMAT_DIMS_1D instead of
NV20_3D_TEX_FORMAT_DIMS_2D for 1D textures, but that did not help.

It is possible that the same problem exists for 2D textures with the
R-wrap mode, but I don't think there are any piglit tests for that.

No test changes on NV20 (10de:0201).

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
(cherry picked from commit 953a3cf0fd)
This commit is contained in:
Ian Romanick 2017-05-25 23:12:52 -07:00 • committed by Juan A. Suarez Romero
parent 6b0ded06b1
commit 6587cbfca2
2 changed files with 32 additions and 3 deletions
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19
src/mesa/drivers/dri/nouveau/nouveau_gldefs.h
View file

@ -238,6 +238,25 @@ nvgl_wrap_mode(unsigned wrap)
}
}
static inline unsigned
nvgl_wrap_mode_nv20(unsigned wrap)
{
switch (wrap) {
case GL_REPEAT:
return 0x1;
case GL_MIRRORED_REPEAT:
return 0x2;
case GL_CLAMP:
return 0x5;
case GL_CLAMP_TO_EDGE:
return 0x3;
case GL_CLAMP_TO_BORDER:
return 0x4;
default:
unreachable("Bad GL texture wrap mode");
}
}
static inline unsigned
nvgl_filter_mode(unsigned filter)
{

16
src/mesa/drivers/dri/nouveau/nv20_state_tex.c
View file

@ -193,9 +193,19 @@ nv20_emit_tex_obj(struct gl_context *ctx, int emit)
| NV20_3D_TEX_FORMAT_NO_BORDER
| 1 << 16;
tx_wrap = nvgl_wrap_mode(sa->WrapR) << 16
| nvgl_wrap_mode(sa->WrapT) << 8
| nvgl_wrap_mode(sa->WrapS) << 0;
switch (t->Target) {
case GL_TEXTURE_1D:
tx_wrap = NV20_3D_TEX_WRAP_R_CLAMP_TO_EDGE
| NV20_3D_TEX_WRAP_T_CLAMP_TO_EDGE
| nvgl_wrap_mode_nv20(sa->WrapS) << 0;
break;
default:
tx_wrap = nvgl_wrap_mode_nv20(sa->WrapR) << 16
| nvgl_wrap_mode_nv20(sa->WrapT) << 8
| nvgl_wrap_mode_nv20(sa->WrapS) << 0;
break;
}
tx_filter = nvgl_filter_mode(sa->MagFilter) << 24
| nvgl_filter_mode(sa->MinFilter) << 16