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authorXiang, Haihao <haihao.xiang@intel.com>2010-12-10 09:31:19 +0800
committerXiang, Haihao <haihao.xiang@intel.com>2010-12-10 13:25:17 +0800
commitd1196bbc191c4f1b355d432dcb2eeff9790fda34 (patch)
tree58b160fbc6f4db5b2ebda9fd272c74bccc7f1b9e /src/mesa/drivers/common
parent3a3b1bd722786ab0b1386a3a505cadfa89798232 (diff)
meta: allow nested meta operations
_mesa_meta_CopyPixels results in nested meta operations on Sandybridge. Previoulsy the second meta operation overrides all states saved by the first meta function.
Diffstat (limited to 'src/mesa/drivers/common')
-rw-r--r--src/mesa/drivers/common/meta.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index 95accc1813..cbc0512b58 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -266,13 +266,14 @@ struct gen_mipmap_state
GLuint FBO;
};
-
+#define MAX_META_OPS_DEPTH 2
/**
* All per-context meta state.
*/
struct gl_meta_state
{
- struct save_state Save; /**< state saved during meta-ops */
+ struct save_state Save[MAX_META_OPS_DEPTH]; /**< state saved during meta-ops */
+ int current_save_state;
struct temp_texture TempTex;
@@ -324,8 +325,13 @@ _mesa_meta_free(struct gl_context *ctx)
static void
_mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
{
- struct save_state *save = &ctx->Meta->Save;
+ struct save_state *save;
+
+ /* hope MAX_META_OPS_DEPTH is large enough */
+ assert(current_save_state < MAX_META_OPS_DEPTH);
+ save = &ctx->Meta->Save[ctx->Meta->current_save_state++];
+ memset(save, 0, sizeof(*save));
save->SavedState = state;
if (state & META_ALPHA_TEST) {
@@ -575,7 +581,7 @@ _mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
static void
_mesa_meta_end(struct gl_context *ctx)
{
- struct save_state *save = &ctx->Meta->Save;
+ struct save_state *save = &ctx->Meta->Save[--ctx->Meta->current_save_state];
const GLbitfield state = save->SavedState;
if (state & META_ALPHA_TEST) {