From be30766f5675cd1b6528a1a0b839c69aa894419d Mon Sep 17 00:00:00 2001
From: Chris Forbes <chrisf@ijw.co.nz>
Date: Mon, 2 Jun 2014 15:50:09 +1200
Subject: mesa: Compute proper strides for compressed texture pixel storage.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
---
 src/mesa/main/texstore.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

(limited to 'src/mesa/main/texstore.c')

diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c
index b5b725405e5..cb81f3fde8d 100644
--- a/src/mesa/main/texstore.c
+++ b/src/mesa/main/texstore.c
@@ -4212,6 +4212,41 @@ _mesa_compute_compressed_pixelstore(GLuint dims, struct gl_texture_image *texIma
    store->TotalRowsPerSlice = store->CopyRowsPerSlice =
          (height + bh - 1) / bh;
    store->CopySlices = depth;
+
+   if (packing->CompressedBlockWidth &&
+       packing->CompressedBlockSize) {
+
+      bw = packing->CompressedBlockWidth;
+
+      if (packing->RowLength) {
+         store->TotalBytesPerRow = packing->CompressedBlockSize *
+            (packing->RowLength + bw - 1) / bw;
+      }
+
+      store->SkipBytes += packing->SkipPixels * packing->CompressedBlockSize / bw;
+   }
+
+   if (dims > 1 && packing->CompressedBlockHeight &&
+       packing->CompressedBlockSize) {
+
+      bh = packing->CompressedBlockHeight;
+
+      store->SkipBytes += packing->SkipRows * store->TotalBytesPerRow / bh;
+      store->CopyRowsPerSlice = (height + bh - 1) / bh;  /* rows in blocks */
+
+      if (packing->ImageHeight) {
+         store->TotalRowsPerSlice = (packing->ImageHeight + bh - 1) / bh;
+      }
+   }
+
+   if (dims > 2 && packing->CompressedBlockDepth &&
+       packing->CompressedBlockSize) {
+
+      int bd = packing->CompressedBlockDepth;
+
+      store->SkipBytes += packing->SkipImages * store->TotalBytesPerRow *
+            store->TotalRowsPerSlice / bd;
+   }
 }
 
 
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