diff options
| author | Chad Versace <[email protected]> | 2011-10-07 16:22:56 -0700 |
|---|---|---|
| committer | Chad Versace <[email protected]> | 2011-10-18 11:42:53 -0700 |
| commit | 4b6311978f6710cfb2e9d77a2ca7a30f709c1f37 (patch) | |
| tree | 49c399047383fe800f0ce05ea92af5f4bbb9ed6b /src/mesa | |
| parent | aa97ababfcd5ae4d4433bd5f672836f40f6595f2 (diff) | |
swrast: Fix fastpaths for glRead/WritePixels(GL_DEPTH_STENCIL)
In some cases, Intel hardware requires that depth and stencil buffers be
separate. To accommodate swrast, i965 resorts to hackery that causes
a segfault in the fastpaths of draw_depth_stencil_pixels() and
read_depth_stencil_pixels().
The hack is that i965 sets framebuffer->Attachment[BUFFER_DEPTH].Renderbuffer
and framebuffer->Attachment[BUFFER_STENCIL].Renderbuffer to a dummy
renderbuffer for which the GetRow accessors and friends are null. The real
buffers are located at framebuffer->_DepthBuffer and framebuffer->_Stencilbuffer.
To fix the segault, this patch skips the fastpath if
framebuffer->Attachment[BUFFER_DEPTH].Renderbuffer->GetRow is null.
Note: This is a candidate for the 7.11 branch.
Reviewed-by: Brian Paul <[email protected]>
Signed-off-by: Chad Versace <[email protected]>
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/swrast/s_drawpix.c | 2 | ||||
| -rw-r--r-- | src/mesa/swrast/s_readpix.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/src/mesa/swrast/s_drawpix.c b/src/mesa/swrast/s_drawpix.c index 6535a8f4350..20bf4d62635 100644 --- a/src/mesa/swrast/s_drawpix.c +++ b/src/mesa/swrast/s_drawpix.c @@ -593,6 +593,8 @@ draw_depth_stencil_pixels(struct gl_context *ctx, GLint x, GLint y, depthRb->Format == MESA_FORMAT_Z24_S8 && type == GL_UNSIGNED_INT_24_8 && depthRb == stencilRb && + depthRb->GetRow && /* May be null if depthRb is a wrapper around + * separate depth and stencil buffers. */ !scaleOrBias && !zoom && ctx->Depth.Mask && diff --git a/src/mesa/swrast/s_readpix.c b/src/mesa/swrast/s_readpix.c index d120468c021..0d2e63f72bc 100644 --- a/src/mesa/swrast/s_readpix.c +++ b/src/mesa/swrast/s_readpix.c @@ -394,6 +394,8 @@ read_depth_stencil_pixels(struct gl_context *ctx, depthRb->Format == MESA_FORMAT_Z24_S8 && type == GL_UNSIGNED_INT_24_8 && depthRb == stencilRb && + depthRb->GetRow && /* May be null if depthRb is a wrapper around + * separate depth and stencil buffers. */ !scaleOrBias && !stencilTransfer) { /* This is the ideal case. |