radeon/r200/r300/r600: add check_blit vtbl function

Check if the native blit formats are supported, if not,
attempt to use an alternate format.

Skip 3, >4 bpp as per comments from mcencora on irc.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>

3 files changed, 36 insertions, 2 deletions

diff --git a/src/mesa/drivers/dri/r600/r600_blit.c b/src/mesa/drivers/dri/r600/r600_blit.c
index 8eafd42e8f..9d17463cae 100644
--- a/src/mesa/drivers/dri/r600/r600_blit.c
+++ b/src/mesa/drivers/dri/r600/r600_blit.c
@@ -33,7 +33,7 @@
 #include "r600_cmdbuf.h"
 
 /* common formats supported as both textures and render targets */
-static unsigned is_blit_supported(gl_format mesa_format)
+unsigned r600_check_blit(gl_format mesa_format)
 {
     switch (mesa_format) {
     case MESA_FORMAT_RGBA8888:
@@ -1582,7 +1582,7 @@ unsigned r600_blit(GLcontext *ctx,
     context_t *context = R700_CONTEXT(ctx);
     int id = 0;
 
-    if (!is_blit_supported(dst_mesaformat))
+    if (!r600_check_blit(dst_mesaformat))
         return GL_FALSE;
 
     if (src_bo == dst_bo) {
diff --git a/src/mesa/drivers/dri/r600/r600_blit.h b/src/mesa/drivers/dri/r600/r600_blit.h
index f280e23489..d56b21ba9b 100644
--- a/src/mesa/drivers/dri/r600/r600_blit.h
+++ b/src/mesa/drivers/dri/r600/r600_blit.h
@@ -1,3 +1,35 @@
+/*
+ * Copyright (C) 2009 Advanced Micro Devices, Inc.
+ *
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef R600_BLIT_H
+#define R600_BLIT_H
+
+unsigned r600_check_blit(gl_format mesa_format);
+
 unsigned r600_blit(GLcontext *ctx,
                    struct radeon_bo *src_bo,
                    intptr_t src_offset,
@@ -19,3 +51,4 @@ unsigned r600_blit(GLcontext *ctx,
                    unsigned h,
                    unsigned flip_y);
 
+#endif // R600_BLIT_H
diff --git a/src/mesa/drivers/dri/r600/r600_context.c b/src/mesa/drivers/dri/r600/r600_context.c
index 1a4b014d9f..3d6802e735 100644
--- a/src/mesa/drivers/dri/r600/r600_context.c
+++ b/src/mesa/drivers/dri/r600/r600_context.c
@@ -236,6 +236,7 @@ static void r600_init_vtbl(radeonContextPtr radeon)
 	radeon->vtbl.pre_emit_atoms = r600_vtbl_pre_emit_atoms;
 	radeon->vtbl.fallback = r600_fallback;
 	radeon->vtbl.emit_query_finish = r600_emit_query_finish;
+	radeon->vtbl.check_blit = r600_check_blit;
 	radeon->vtbl.blit = r600_blit;
 }