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_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
  47 static INLINE GLboolean
  48 is_front_buffer_dirty(struct st_context *st)
  49 {
  50    return st->frontbuffer_status == FRONT_STATUS_DIRTY;
  51 }
  52
  53
  54 /**
  55  * Tell the winsys to display the front color buffer on-screen.
  56  */
  57 static void
  58 display_front_buffer(struct st_context *st)
  59 {
  60    GLframebuffer *fb = st->ctx->DrawBuffer;
  61    struct st_renderbuffer *strb
  62       = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
  63    struct pipe_surface *front_surf = strb->surface;
  64
  65    /* Hook for copying "fake" frontbuffer if necessary:
  66     */
  67    st->pipe->winsys->flush_frontbuffer( st->pipe->winsys, front_surf,
  68                                         st->pipe->priv );
  69
  70    /*
  71    st->frontbuffer_status = FRONT_STATUS_UNDEFINED;
  72    */
  73 }
  74
  75
  76 void st_flush( struct st_context *st, uint pipeFlushFlags,
  77                struct pipe_fence_handle **fence )
  78 {
  79    FLUSH_VERTICES(st->ctx, 0);
  80
  81    st_flush_bitmap_cache(st);
  82
  83    st->pipe->flush( st->pipe, pipeFlushFlags, fence );
  84 }
  85
  86
  87 /**
  88  * Flush, and wait for completion.
  89  */
  90 void st_finish( struct st_context *st )
  91 {
  92    struct pipe_fence_handle *fence = NULL;
  93
  94    st_flush(st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence);
  95
  96    st->pipe->winsys->fence_finish(st->pipe->winsys, fence, 0);
  97    st->pipe->winsys->fence_reference(st->pipe->winsys, &fence, NULL);
  98 }
  99
 100
 101
 102 /**
 103  * Called via ctx->Driver.Flush()
 104  */
 105 static void st_glFlush(GLcontext *ctx)
 106 {
 107    struct st_context *st = ctx->st;
 108
 109    if (is_front_buffer_dirty(st)) {
 110       st_finish(st);
 111       display_front_buffer(st);
 112    }
 113    else {
 114       st_flush(st, PIPE_FLUSH_RENDER_CACHE, NULL);
 115    }
 116 }
 117
 118
 119 /**
 120  * Called via ctx->Driver.Finish()
 121  */
 122 static void st_glFinish(GLcontext *ctx)
 123 {
 124    struct st_context *st = ctx->st;
 125
 126    st_finish(st);
 127
 128    if (is_front_buffer_dirty(st)) {
 129       display_front_buffer(st);
 130    }
 131 }
 132
 133
 134 void st_init_flush_functions(struct dd_function_table *functions)
 135 {
 136    functions->Flush = st_glFlush;
 137    functions->Finish = st_glFinish;
 138 }