intel: Add support for ARB_sampler_objects.

This extension support consists of replacing
"gl_texture_obj->Sampler." with "_mesa_get_samplerobj(ctx, unit)->".
One instance of referencing the texture's base sampler remains in the
initial miptree allocation, where I'm not sure we have a clear
association with any texture unit.

Tested with piglit ARB_sampler_objects/sampler-objects.

Reviewed-by: Brian Paul <brianp@vmware.com>

1 files changed, 14 insertions, 12 deletions

diff --git a/src/mesa/drivers/dri/i915/i830_texstate.c b/src/mesa/drivers/dri/i915/i830_texstate.c
index 7554bd5..3298dbb 100644
--- a/src/mesa/drivers/dri/i915/i830_texstate.c
+++ b/src/mesa/drivers/dri/i915/i830_texstate.c
@@ -29,6 +29,7 @@
 #include "main/enums.h"
 #include "main/colormac.h"
 #include "main/macros.h"
+#include "main/samplerobj.h"
 
 #include "intel_mipmap_tree.h"
 #include "intel_tex.h"
@@ -120,6 +121,7 @@ i830_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
    struct gl_texture_object *tObj = tUnit->_Current;
    struct intel_texture_object *intelObj = intel_texture_object(tObj);
    struct gl_texture_image *firstImage;
+   struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
    GLuint *state = i830->state.Tex[unit], format, pitch;
    GLint lodbias;
    GLubyte border[4];
@@ -193,7 +195,7 @@ i830_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
       float maxlod;
       uint32_t minlod_fixed, maxlod_fixed;
 
-      switch (tObj->Sampler.MinFilter) {
+      switch (sampler->MinFilter) {
       case GL_NEAREST:
          minFilt = FILTER_NEAREST;
          mipFilt = MIPFILTER_NONE;
@@ -222,12 +224,12 @@ i830_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
          return GL_FALSE;
       }
 
-      if (tObj->Sampler.MaxAnisotropy > 1.0) {
+      if (sampler->MaxAnisotropy > 1.0) {
          minFilt = FILTER_ANISOTROPIC;
          magFilt = FILTER_ANISOTROPIC;
       }
       else {
-         switch (tObj->Sampler.MagFilter) {
+         switch (sampler->MagFilter) {
          case GL_NEAREST:
             magFilt = FILTER_NEAREST;
             break;
@@ -239,7 +241,7 @@ i830_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
          }
       }
 
-      lodbias = (int) ((tUnit->LodBias + tObj->Sampler.LodBias) * 16.0);
+      lodbias = (int) ((tUnit->LodBias + sampler->LodBias) * 16.0);
       if (lodbias < -64)
           lodbias = -64;
       if (lodbias > 63)
@@ -259,8 +261,8 @@ i830_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
        * addressable (smallest resolution) LOD.  Use it to cover both
        * MAX_LEVEL and MAX_LOD.
        */
-      minlod_fixed = U_FIXED(CLAMP(tObj->Sampler.MinLod, 0.0, 11), 4);
-      maxlod = MIN2(tObj->Sampler.MaxLod, tObj->_MaxLevel - tObj->BaseLevel);
+      minlod_fixed = U_FIXED(CLAMP(sampler->MinLod, 0.0, 11), 4);
+      maxlod = MIN2(sampler->MaxLod, tObj->_MaxLevel - tObj->BaseLevel);
       if (intel->intelScreen->deviceID == PCI_CHIP_I855_GM ||
 	  intel->intelScreen->deviceID == PCI_CHIP_I865_G) {
 	 maxlod_fixed = U_FIXED(CLAMP(maxlod, 0.0, 11.75), 2);
@@ -279,8 +281,8 @@ i830_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
    }
 
    {
-      GLenum ws = tObj->Sampler.WrapS;
-      GLenum wt = tObj->Sampler.WrapT;
+      GLenum ws = sampler->WrapS;
+      GLenum wt = sampler->WrapT;
 
 
       /* 3D textures not available on i830
@@ -300,10 +302,10 @@ i830_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
    }
 
    /* convert border color from float to ubyte */
-   CLAMPED_FLOAT_TO_UBYTE(border[0], tObj->Sampler.BorderColor.f[0]);
-   CLAMPED_FLOAT_TO_UBYTE(border[1], tObj->Sampler.BorderColor.f[1]);
-   CLAMPED_FLOAT_TO_UBYTE(border[2], tObj->Sampler.BorderColor.f[2]);
-   CLAMPED_FLOAT_TO_UBYTE(border[3], tObj->Sampler.BorderColor.f[3]);
+   CLAMPED_FLOAT_TO_UBYTE(border[0], sampler->BorderColor.f[0]);
+   CLAMPED_FLOAT_TO_UBYTE(border[1], sampler->BorderColor.f[1]);
+   CLAMPED_FLOAT_TO_UBYTE(border[2], sampler->BorderColor.f[2]);
+   CLAMPED_FLOAT_TO_UBYTE(border[3], sampler->BorderColor.f[3]);
 
    state[I830_TEXREG_TM0S4] = PACK_COLOR_8888(border[3],
 					      border[0],