src/mesa/state_tracker/st_cb_flush.c

   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_clear.h"
  41 #include "st_cb_fbo.h"
  42 #include "st_public.h"
  43 #include "pipe/p_context.h"
  44 #include "pipe/p_defines.h"
  45 #include "pipe/p_screen.h"
  46 #include "util/u_gen_mipmap.h"
  47 #include "util/u_blit.h"
  48
  49
  50 static INLINE GLboolean
  51 is_front_buffer_dirty(struct st_context *st)
  52 {
  53    return st->frontbuffer_status == FRONT_STATUS_DIRTY;
  54 }
  55
  56
  57 /**
  58  * Tell the screen to display the front color buffer on-screen.
  59  */
  60 static void
  61 display_front_buffer(struct st_context *st)
  62 {
  63    GLframebuffer *fb = st->ctx->DrawBuffer;
  64    struct st_renderbuffer *strb
  65       = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
  66
  67    if (strb) {
  68       struct pipe_surface *front_surf = strb->surface;
  69
  70       /* Hook for copying "fake" frontbuffer if necessary:
  71        */
  72       st->pipe->screen->flush_frontbuffer( st->pipe->screen, front_surf,
  73                                            st->pipe->priv );
  74
  75       /*
  76         st->frontbuffer_status = FRONT_STATUS_UNDEFINED;
  77       */
  78    }
  79 }
  80
  81
  82 void st_flush( struct st_context *st, uint pipeFlushFlags,
  83                struct pipe_fence_handle **fence )
  84 {
  85    FLUSH_CURRENT(st->ctx, 0);
  86
  87    /* Release any vertex buffers that might potentially be accessed in
  88     * successive frames:
  89     */
  90    st_flush_bitmap(st);
  91    st_flush_clear(st);
  92    util_blit_flush(st->blit);
  93    util_gen_mipmap_flush(st->gen_mipmap);
  94
  95    st->pipe->flush( st->pipe, pipeFlushFlags, fence );
  96 }
  97
  98
  99 /**
 100  * Flush, and wait for completion.
 101  */
 102 void st_finish( struct st_context *st )
 103 {
 104    struct pipe_fence_handle *fence = NULL;
 105
 106    st_flush(st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence);
 107
 108    if(fence) {
 109       st->pipe->screen->fence_finish(st->pipe->screen, fence, 0);
 110       st->pipe->screen->fence_reference(st->pipe->screen, &fence, NULL);
 111    }
 112 }
 113
 114
 115
 116 /**
 117  * Called via ctx->Driver.Flush()
 118  */
 119 static void st_glFlush(GLcontext *ctx)
 120 {
 121    struct st_context *st = ctx->st;
 122
 123    /* Don't call st_finish() here.  It is not the state tracker's
 124     * responsibilty to inject sleeps in the hope of avoiding buffer
 125     * synchronization issues.  Calling finish() here will just hide
 126     * problems that need to be fixed elsewhere.
 127     */
 128    st_flush(st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
 129
 130    if (is_front_buffer_dirty(st)) {
 131       display_front_buffer(st);
 132    }
 133 }
 134
 135
 136 /**
 137  * Called via ctx->Driver.Finish()
 138  */
 139 static void st_glFinish(GLcontext *ctx)
 140 {
 141    struct st_context *st = ctx->st;
 142
 143    st_finish(st);
 144
 145    if (is_front_buffer_dirty(st)) {
 146       display_front_buffer(st);
 147    }
 148 }
 149
 150
 151 void st_init_flush_functions(struct dd_function_table *functions)
 152 {
 153    functions->Flush = st_glFlush;
 154    functions->Finish = st_glFinish;
 155 }