i915: Accelerate depth textures with border color.

The fallback was introduced to fix bug #16697, but made the test it was
fixing run excessively long.

1 files changed, 15 insertions, 4 deletions

diff --git a/src/mesa/drivers/dri/i915/i915_texstate.c b/src/mesa/drivers/dri/i915/i915_texstate.c
index ae42b102db8..d1b0dcdf319 100644
--- a/src/mesa/drivers/dri/i915/i915_texstate.c
+++ b/src/mesa/drivers/dri/i915/i915_texstate.c
@@ -307,10 +307,21 @@ i915_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
    }
 
 
-   state[I915_TEXREG_SS4] = INTEL_PACKCOLOR8888(tObj->_BorderChan[0],
-                                                tObj->_BorderChan[1],
-                                                tObj->_BorderChan[2],
-                                                tObj->_BorderChan[3]);
+   if (firstImage->_BaseFormat == GL_DEPTH_COMPONENT) {
+      /* GL specs that border color for depth textures is taken from the
+       * R channel, while the hardware uses A.  Spam R into all the channels
+       * for safety.
+       */
+      state[I915_TEXREG_SS4] = INTEL_PACKCOLOR8888(tObj->_BorderChan[0],
+						   tObj->_BorderChan[0],
+						   tObj->_BorderChan[0],
+						   tObj->_BorderChan[0]);
+   } else {
+      state[I915_TEXREG_SS4] = INTEL_PACKCOLOR8888(tObj->_BorderChan[0],
+						   tObj->_BorderChan[1],
+						   tObj->_BorderChan[2],
+						   tObj->_BorderChan[3]);
+   }
 
 
    I915_ACTIVESTATE(i915, I915_UPLOAD_TEX(unit), GL_TRUE);