src/gallium/drivers/softpipe/sp_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 /* Author:
  29  *    Keith Whitwell <keith@tungstengraphics.com>
  30  */
  31
  32
  33 #include "pipe/p_defines.h"
  34 #include "pipe/p_screen.h"
  35 #include "draw/draw_context.h"
  36 #include "sp_flush.h"
  37 #include "sp_context.h"
  38 #include "sp_state.h"
  39 #include "sp_tile_cache.h"
  40 #include "sp_tex_tile_cache.h"
  41 #include "util/u_memory.h"
  42
  43
  44 void
  45 softpipe_flush( struct pipe_context *pipe,
  46                 unsigned flags,
  47                 struct pipe_fence_handle **fence )
  48 {
  49    struct softpipe_context *softpipe = softpipe_context(pipe);
  50    uint i;
  51
  52    draw_flush(softpipe->draw);
  53
  54    if (flags & SP_FLUSH_TEXTURE_CACHE) {
  55       unsigned sh;
  56
  57       for (sh = 0; sh < Elements(softpipe->tex_cache); sh++) {
  58          for (i = 0; i < softpipe->num_sampler_views[sh]; i++) {
  59             sp_flush_tex_tile_cache(softpipe->tex_cache[sh][i]);
  60          }
  61       }
  62    }
  63
  64    /* If this is a swapbuffers, just flush color buffers.
  65     *
  66     * The zbuffer changes are not discarded, but held in the cache
  67     * in the hope that a later clear will wipe them out.
  68     */
  69    for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++)
  70       if (softpipe->cbuf_cache[i])
  71          sp_flush_tile_cache(softpipe->cbuf_cache[i]);
  72
  73    if (softpipe->zsbuf_cache)
  74       sp_flush_tile_cache(softpipe->zsbuf_cache);
  75
  76    softpipe->dirty_render_cache = FALSE;
  77
  78    /* Enable to dump BMPs of the color/depth buffers each frame */
  79 #if 0
  80    if(flags & PIPE_FLUSH_FRAME) {
  81       static unsigned frame_no = 1;
  82       static char filename[256];
  83       util_snprintf(filename, sizeof(filename), "cbuf_%u.bmp", frame_no);
  84       debug_dump_surface_bmp(softpipe, filename, softpipe->framebuffer.cbufs[0]);
  85       util_snprintf(filename, sizeof(filename), "zsbuf_%u.bmp", frame_no);
  86       debug_dump_surface_bmp(softpipe, filename, softpipe->framebuffer.zsbuf);
  87       ++frame_no;
  88    }
  89 #endif
  90
  91    if (fence)
  92       *fence = (void*)(intptr_t)1;
  93 }
  94
  95 void
  96 softpipe_flush_wrapped(struct pipe_context *pipe,
  97                        struct pipe_fence_handle **fence,
  98                        enum pipe_flush_flags flags)
  99 {
 100    softpipe_flush(pipe, SP_FLUSH_TEXTURE_CACHE, fence);
 101 }
 102
 103
 104 /**
 105  * Flush context if necessary.
 106  *
 107  * Returns FALSE if it would have block, but do_not_block was set, TRUE
 108  * otherwise.
 109  *
 110  * TODO: move this logic to an auxiliary library?
 111  */
 112 boolean
 113 softpipe_flush_resource(struct pipe_context *pipe,
 114                         struct pipe_resource *texture,
 115                         unsigned level,
 116                         int layer,
 117                         unsigned flush_flags,
 118                         boolean read_only,
 119                         boolean cpu_access,
 120                         boolean do_not_block)
 121 {
 122    unsigned referenced;
 123
 124    referenced = softpipe_is_resource_referenced(pipe, texture, level, layer);
 125
 126    if ((referenced & SP_REFERENCED_FOR_WRITE) ||
 127        ((referenced & SP_REFERENCED_FOR_READ) && !read_only)) {
 128
 129       /*
 130        * TODO: The semantics of these flush flags are too obtuse. They should
 131        * disappear and the pipe driver should just ensure that all visible
 132        * side-effects happen when they need to happen.
 133        */
 134       if (referenced & SP_REFERENCED_FOR_READ)
 135          flush_flags |= SP_FLUSH_TEXTURE_CACHE;
 136
 137       if (cpu_access) {
 138          /*
 139           * Flush and wait.
 140           */
 141
 142          struct pipe_fence_handle *fence = NULL;
 143
 144          if (do_not_block)
 145             return FALSE;
 146
 147          softpipe_flush(pipe, flush_flags, &fence);
 148
 149          if (fence) {
 150             /*
 151              * This is for illustrative purposes only, as softpipe does not
 152              * have fences.
 153              */
 154             pipe->screen->fence_finish(pipe->screen, fence,
 155                                        PIPE_TIMEOUT_INFINITE);
 156             pipe->screen->fence_reference(pipe->screen, &fence, NULL);
 157          }
 158       } else {
 159          /*
 160           * Just flush.
 161           */
 162
 163          softpipe_flush(pipe, flush_flags, NULL);
 164       }
 165    }
 166
 167    return TRUE;
 168 }