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authormarha <marha@users.sourceforge.net>2010-12-28 16:10:20 +0000
committermarha <marha@users.sourceforge.net>2010-12-28 16:10:20 +0000
commit807c6931fe683fd844ceec1b023232181e6aae03 (patch)
tree1a131ed95fe2200d0ad33da8f7755a7ed2364adc /mesalib/src/mesa/state_tracker/st_cb_flush.c
parent973099dda7e49e5abe29819a7124b3b1e7bd8b92 (diff)
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xserver and mesa git update 28-12-2010
Diffstat (limited to 'mesalib/src/mesa/state_tracker/st_cb_flush.c')
-rw-r--r--mesalib/src/mesa/state_tracker/st_cb_flush.c164
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
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+/**************************************************************************
+ *
+ * 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
+}