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radeon: r300 fix span reading for macro tiled buffers.

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this uses the correct formula for macro tiled buffers for readback
This commit is contained in:
Dave Airlie
2009-07-15 12:03:34 +10:00
parent 9b17f041d1
commit 94d2a809f9
1 changed files with 7 additions and 6 deletions
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src/mesa/drivers/dri/radeon/radeon_span.c
+7 -6
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@@ -74,12 +74,13 @@ static GLubyte *radeon_ptr32(const struct radeon_renderbuffer * rrb,
offset += ((x & 31) >> 2) << 5;
offset += (x & 3) << 2;
} else {
nmacroblkpl = rrb->pitch >> 6;
offset += ((y >> 3) * nmacroblkpl) << 11;
offset += (y & 7) << 8;
offset += (x >> 6) << 11;
offset += ((x & 63) >> 3) << 5;
offset += (x & 7) << 2;
offset = ((y >> 3) * (rrb->pitch >> 8) + (x >> 6)) << 11;
offset += (((y >> 2) ^ (x >> 6)) & 0x1) << 10;
offset += (((y >> 3) ^ (x >> 5)) & 0x1) << 9;
offset += (((y >> 1) ^ (x >> 5)) & 0x1) << 8;
offset += (((y >> 2) ^ (x >> 4)) & 0x1) << 7;
offset += (y & 1) << 6;
offset += (x & 15) << 2;
}
} else {
nmicroblkpl = ((rrb->pitch + 31) & ~31) >> 5;