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    struct pipe_surface *front_surf = strb->surface;
  67
  68    /* Hook for copying "fake" frontbuffer if necessary:
  69     */
  70    st->pipe->screen->flush_frontbuffer( st->pipe->screen, front_surf,
  71                                         st->pipe->priv );
  72
  73    /*
  74    st->frontbuffer_status = FRONT_STATUS_UNDEFINED;
  75    */
  76 }
  77
  78
  79 void st_flush( struct st_context *st, uint pipeFlushFlags,
  80                struct pipe_fence_handle **fence )
  81 {
  82    FLUSH_VERTICES(st->ctx, 0);
  83
  84    /* Release any vertex buffers that might potentially be accessed in
  85     * successive frames:
  86     */
  87    st_flush_bitmap(st);
  88    st_flush_clear(st);
  89    util_blit_flush(st->blit);
  90    util_gen_mipmap_flush(st->gen_mipmap);
  91
  92    st->pipe->flush( st->pipe, pipeFlushFlags, fence );
  93 }
  94
  95
  96 /**
  97  * Flush, and wait for completion.
  98  */
  99 void st_finish( struct st_context *st )
 100 {
 101    struct pipe_fence_handle *fence = NULL;
 102
 103    st_flush(st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence);
 104
 105    if(fence) {
 106       st->pipe->screen->fence_finish(st->pipe->screen, fence, 0);
 107       st->pipe->screen->fence_reference(st->pipe->screen, &fence, NULL);
 108    }
 109 }
 110
 111
 112
 113 /**
 114  * Called via ctx->Driver.Flush()
 115  */
 116 static void st_glFlush(GLcontext *ctx)
 117 {
 118    struct st_context *st = ctx->st;
 119
 120    if (is_front_buffer_dirty(st)) {
 121       st_finish(st);
 122       display_front_buffer(st);
 123    }
 124    else {
 125       st_flush(st, PIPE_FLUSH_RENDER_CACHE, NULL);
 126    }
 127 }
 128
 129
 130 /**
 131  * Called via ctx->Driver.Finish()
 132  */
 133 static void st_glFinish(GLcontext *ctx)
 134 {
 135    struct st_context *st = ctx->st;
 136
 137    st_finish(st);
 138
 139    if (is_front_buffer_dirty(st)) {
 140       display_front_buffer(st);
 141    }
 142 }
 143
 144
 145 void st_init_flush_functions(struct dd_function_table *functions)
 146 {
 147    functions->Flush = st_glFlush;
 148    functions->Finish = st_glFinish;
 149 }