st_cb_flush.c revision 574f964667c5ec35f4832c839a9dcc24f92e2aab 
1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 /*
29  * Authors:
30  *   Keith Whitwell <keith@tungstengraphics.com>
31  *   Brian Paul
32  */
33
34#include "main/glheader.h"
35#include "main/macros.h"
36#include "main/context.h"
37#include "st_context.h"
38#include "st_cb_bitmap.h"
39#include "st_cb_flush.h"
40#include "st_cb_fbo.h"
41#include "st_public.h"
42#include "pipe/p_context.h"
43#include "pipe/p_defines.h"
44#include "pipe/p_winsys.h"
45
46
47static void
48flush_front_buffer(struct st_context *st, uint pipeFlushFlags,
49                   struct pipe_fence_handle **fence)
50{
51   GLframebuffer *fb = st->ctx->DrawBuffer;
52
53   if (!fb)
54      return;
55
56   /* XXX: temporary hack.  This flag should only be set if we do any
57    * rendering to the front buffer.
58    *
59    * Further more, the scissor rectangle could be tracked to
60    * construct a dirty region of the front buffer, to avoid
61    * situations where it must be copied repeatedly.
62    *
63    * In the extreme case, some kind of timer could be set up to allow
64    * coalescing of multiple flushes to the frontbuffer, which can be
65    * quite a performance drain if there are a sufficient number of
66    * them.
67    */
68   st->flags.frontbuffer_dirty
69      = (fb->_ColorDrawBufferMask[0] & BUFFER_BIT_FRONT_LEFT);
70
71   if (st->flags.frontbuffer_dirty) {
72      struct st_renderbuffer *strb
73         = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
74      struct pipe_surface *front_surf = strb->surface;
75
76      /* If we aren't rendering to the frontbuffer, this is a noop.
77       * This should be uncontroversial for glFlush, though people may
78       * feel more strongly about glFinish.
79       *
80       * Additionally, need to make sure that the frontbuffer_dirty
81       * flag really gets set on frontbuffer rendering.
82       */
83      st->pipe->flush( st->pipe, pipeFlushFlags, fence );
84
85      /* Hook for copying "fake" frontbuffer if necessary:
86       */
87      st->pipe->winsys->flush_frontbuffer( st->pipe->winsys, front_surf,
88                                           st->pipe->priv );
89      st->flags.frontbuffer_dirty = 0;
90   }
91}
92
93
94void st_flush( struct st_context *st, uint pipeFlushFlags,
95               struct pipe_fence_handle **fence )
96{
97   FLUSH_VERTICES(st->ctx, 0);
98
99   st_flush_bitmap_cache(st);
100
101   st->pipe->flush( st->pipe, pipeFlushFlags, fence );
102}
103
104
105/**
106 * Called via ctx->Driver.Flush()
107 */
108static void st_glFlush(GLcontext *ctx)
109{
110   st_flush_bitmap_cache(ctx->st);
111
112   FLUSH_VERTICES(ctx, 0);
113
114   flush_front_buffer(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
115}
116
117
118void st_finish( struct st_context *st )
119{
120   struct pipe_fence_handle *fence = NULL;
121
122   st_flush(st, PIPE_FLUSH_RENDER_CACHE, &fence);
123
124   st->pipe->winsys->fence_finish(st->pipe->winsys, fence, 0);
125   st->pipe->winsys->fence_reference(st->pipe->winsys, &fence, NULL);
126}
127
128
129/**
130 * Called via ctx->Driver.Finish()
131 */
132static void st_glFinish(GLcontext *ctx)
133{
134   st_finish( ctx->st );
135}
136
137
138void st_init_flush_functions(struct dd_function_table *functions)
139{
140   functions->Flush = st_glFlush;
141   functions->Finish = st_glFinish;
142}
143