radeon/exa: fallback for non-affine transforms

We need to implement a texture lookup with perspective
divide for non-affine transforms.  For now just fallback.
Should fix:
https://bugs.freedesktop.org/show_bug.cgi?id=31799
although it appears either EXA or the xserver gets this
wrong too.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/radeon_exa_render.c b/src/radeon_exa_render.c
index da724162..2e13b000 100644
--- a/src/radeon_exa_render.c
+++ b/src/radeon_exa_render.c
@@ -379,6 +379,9 @@ static Bool R100CheckCompositeTexture(PicturePtr pPict,
 	    RADEON_FALLBACK(("REPEAT_NONE unsupported for transformed xRGB source\n"));
     }
 
+    if (!radeon_transform_is_affine(pPict->transform))
+	RADEON_FALLBACK(("non-affine transforms not supported\n"));
+
     return TRUE;
 }
 
@@ -778,6 +781,9 @@ static Bool R200CheckCompositeTexture(PicturePtr pPict,
 	    RADEON_FALLBACK(("REPEAT_NONE unsupported for transformed xRGB source\n"));
     }
 
+    if (!radeon_transform_is_affine(pPict->transform))
+	RADEON_FALLBACK(("non-affine transforms not supported\n"));
+
     return TRUE;
 }
 
@@ -1162,6 +1168,9 @@ static Bool R300CheckCompositeTexture(PicturePtr pPict,
 	    RADEON_FALLBACK(("REPEAT_NONE unsupported for transformed xRGB source\n"));
     }
 
+    if (!radeon_transform_is_affine(pPict->transform))
+	RADEON_FALLBACK(("non-affine transforms not supported\n"));
+
     return TRUE;
 }