radeon-common: Fix crash in glGetTexImage

Since texture images are now stored in miptrees, we cannot usually
access them directly via the Data pointer.

So we wrap Mesa's implementation by map/unmap calls.

This crash was triggered by Sauerbraten, Piglit now contains a
regression test.

Signed-off-by: Nicolai Haehnle <nhaehnle@gmail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/radeon/radeon_tex.c b/src/mesa/drivers/dri/radeon/radeon_tex.c
index e1b988bf4d..4d98b72612 100644
--- a/src/mesa/drivers/dri/radeon/radeon_tex.c
+++ b/src/mesa/drivers/dri/radeon/radeon_tex.c
@@ -456,6 +456,8 @@ void radeonInitTextureFuncs( struct dd_function_table *functions )
    functions->TexImage2D		= radeonTexImage2D;
    functions->TexSubImage1D		= radeonTexSubImage1D;
    functions->TexSubImage2D		= radeonTexSubImage2D;
+   functions->GetTexImage               = radeonGetTexImage;
+   functions->GetCompressedTexImage     = radeonGetCompressedTexImage;
 
    functions->NewTextureObject		= radeonNewTextureObject;
    //   functions->BindTexture		= radeonBindTexture;