-
-/**
- * intel_miptree_pitch_align:
- *
- * @intel: intel context pointer
- *
- * @mt: the miptree to compute pitch alignment for
- *
- * @pitch: the natural pitch value
- *
- * Given @pitch, compute a larger value which accounts for
- * any necessary alignment required by the device
- */
-int intel_miptree_pitch_align (struct intel_context *intel,
- struct intel_mipmap_tree *mt,
- uint32_t tiling,
- int pitch)
-{
-#ifdef I915
- GLcontext *ctx = &intel->ctx;
-#endif
-
- if (!mt->compressed) {
- int pitch_align;
-
- /* XXX: Align pitch to multiple of 64 bytes for now to allow
- * render-to-texture to work in all cases. This should probably be
- * replaced at some point by some scheme to only do this when really
- * necessary.
- */
- pitch_align = 64;
-
- if (tiling == I915_TILING_X)
- pitch_align = 512;
- else if (tiling == I915_TILING_Y)
- pitch_align = 128;
-
- pitch = ALIGN(pitch * mt->cpp, pitch_align);
-
-#ifdef I915
- /* XXX: At least the i915 seems very upset when the pitch is a multiple
- * of 1024 and sometimes 512 bytes - performance can drop by several
- * times. Go to the next multiple of the required alignment for now.
- */
- if (!(pitch & 511) &&
- (pitch + pitch_align) < (1 << ctx->Const.MaxTextureLevels))
- pitch += pitch_align;
-#endif
-
- pitch /= mt->cpp;
- }
- return pitch;
-}
-
-