xserver and mesa git update 28-12-2010

1 files changed, 164 insertions, 0 deletions

diff --git a/mesalib/src/mesa/state_tracker/st_cb_flush.c b/mesalib/src/mesa/state_tracker/st_cb_flush.c
new file mode 100644
index 000000000..31189f360
--- /dev/null
+++ b/mesalib/src/mesa/state_tracker/st_cb_flush.c
@@ -0,0 +1,164 @@
+/**************************************************************************

+ * 

+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.

+ * 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, sub license, 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 NON-INFRINGEMENT.

+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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.

+ * 

+ **************************************************************************/

+

+ /*

+  * Authors:

+  *   Keith Whitwell <keith@tungstengraphics.com>

+  *   Brian Paul

+  */

+

+#include "main/glheader.h"

+#include "main/macros.h"

+#include "main/context.h"

+#include "st_context.h"

+#include "st_cb_bitmap.h"

+#include "st_cb_flush.h"

+#include "st_cb_clear.h"

+#include "st_cb_fbo.h"

+#include "st_manager.h"

+#include "pipe/p_context.h"

+#include "pipe/p_defines.h"

+#include "pipe/p_screen.h"

+#include "util/u_gen_mipmap.h"

+#include "util/u_blit.h"

+

+

+/** Check if we have a front color buffer and if it's been drawn to. */

+static INLINE GLboolean

+is_front_buffer_dirty(struct st_context *st)

+{

+   struct gl_framebuffer *fb = st->ctx->DrawBuffer;

+   struct st_renderbuffer *strb

+      = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);

+   return strb && strb->defined;

+}

+

+

+/**

+ * Tell the screen to display the front color buffer on-screen.

+ */

+static void

+display_front_buffer(struct st_context *st)

+{

+   struct gl_framebuffer *fb = st->ctx->DrawBuffer;

+   struct st_renderbuffer *strb

+      = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);

+

+   if (strb) {

+      /* Hook for copying "fake" frontbuffer if necessary:

+       */

+      st_manager_flush_frontbuffer(st);

+   }

+}

+

+

+void st_flush( struct st_context *st, uint pipeFlushFlags,

+               struct pipe_fence_handle **fence )

+{

+   FLUSH_CURRENT(st->ctx, 0);

+

+   /* Release any vertex buffers that might potentially be accessed in

+    * successive frames:

+    */

+   st_flush_bitmap(st);

+   st_flush_clear(st);

+   util_blit_flush(st->blit);

+   util_gen_mipmap_flush(st->gen_mipmap);

+

+   st->pipe->flush( st->pipe, pipeFlushFlags, fence );

+}

+

+

+/**

+ * Flush, and wait for completion.

+ */

+void st_finish( struct st_context *st )

+{

+   struct pipe_fence_handle *fence = NULL;

+

+   st_flush(st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence);

+

+   if(fence) {

+      st->pipe->screen->fence_finish(st->pipe->screen, fence, 0);

+      st->pipe->screen->fence_reference(st->pipe->screen, &fence, NULL);

+   }

+}

+

+

+

+/**

+ * Called via ctx->Driver.Flush()

+ */

+static void st_glFlush(struct gl_context *ctx)

+{

+   struct st_context *st = st_context(ctx);

+

+   /* Don't call st_finish() here.  It is not the state tracker's

+    * responsibilty to inject sleeps in the hope of avoiding buffer

+    * synchronization issues.  Calling finish() here will just hide

+    * problems that need to be fixed elsewhere.

+    */

+   st_flush(st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);

+

+   if (is_front_buffer_dirty(st)) {

+      display_front_buffer(st);

+   }

+}

+

+

+/**

+ * Called via ctx->Driver.Finish()

+ */

+static void st_glFinish(struct gl_context *ctx)

+{

+   struct st_context *st = st_context(ctx);

+

+   st_finish(st);

+

+   if (is_front_buffer_dirty(st)) {

+      display_front_buffer(st);

+   }

+}

+

+

+void st_init_flush_functions(struct dd_function_table *functions)

+{

+   functions->Flush = st_glFlush;

+   functions->Finish = st_glFinish;

+

+   /* Windows opengl32.dll calls glFinish prior to every swapbuffers.

+    * This is unnecessary and degrades performance.  Luckily we have some

+    * scope to work around this, as the externally-visible behaviour of

+    * Finish() is identical to Flush() in all cases - no differences in

+    * rendering or ReadPixels are visible if we opt not to wait here.

+    *

+    * Only set this up on windows to avoid suprise elsewhere.

+    */

+#ifdef PIPE_OS_WINDOWS

+   functions->Finish = st_glFlush;

+#endif

+}