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authorIan Romanick <ian.d.romanick@intel.com>2008-12-19 13:03:51 -0800
committerIan Romanick <ian.d.romanick@intel.com>2008-12-19 13:06:53 -0800
commitf83f5ec8f5f1159cfd0ec2596ceab725c073266e (patch)
tree770f0fe2fcaa75d2920519ff1ed3ba5c87809fb1 /src/gallium/include
parenta330933bb75c38148668637cd22b90d75d39506f (diff)
Add do_row_3d for mipmapping 3D textures
Previously 3D textures were mipmapped using multiple passed through the 2D mipmap generation code. This had 3 disadvantages. First, the extra passes were slow. Second, this required the allocation of a temporary buffer to hold intermediate data. Third, and most important, the extra passes caused loss of additional bits due to integer division / bit-shifting. With this change, our mipmapgen conformance test passes for non-compressed texture formats.
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