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-rw-r--r--src/mesa/drivers/dri/intel/intel_tex_copy.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/intel/intel_tex_copy.c b/src/mesa/drivers/dri/intel/intel_tex_copy.c
index 549a4acc7d9..ddc2c337c8a 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_copy.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_copy.c
@@ -74,6 +74,14 @@ get_teximage_source(struct intel_context *intel, GLenum internalFormat)
return NULL;
case GL_RGBA:
case GL_RGBA8:
+ irb = intel_renderbuffer(intel->ctx.ReadBuffer->_ColorReadBuffer);
+ /* We're required to set alpha to 1.0 in this case, but we can't
+ * do that with the blitter, so fall back. We could use the 3D
+ * engine or do two passes with the blitter, but it doesn't seem
+ * worth it for this case. */
+ if (irb->Base._BaseFormat == GL_RGB)
+ return NULL;
+ return irb->region;
case GL_RGB:
case GL_RGB8:
return intel_readbuf_region(intel);