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 "draw/draw_context.h"
  35 #include "sp_flush.h"
  36 #include "sp_context.h"
  37 #include "sp_state.h"
  38 #include "sp_tile_cache.h"
  39 #include "sp_tex_tile_cache.h"
  40
  41
  42 void
  43 softpipe_flush( struct pipe_context *pipe,
  44                 unsigned flags,
  45                 struct pipe_fence_handle **fence )
  46 {
  47    struct softpipe_context *softpipe = softpipe_context(pipe);
  48    uint i;
  49
  50    draw_flush(softpipe->draw);
  51
  52    if (flags & PIPE_FLUSH_TEXTURE_CACHE) {
  53       for (i = 0; i < softpipe->num_sampler_views; i++) {
  54          sp_flush_tex_tile_cache(softpipe->tex_cache[i]);
  55       }
  56       for (i = 0; i < softpipe->num_vertex_sampler_views; i++) {
  57          sp_flush_tex_tile_cache(softpipe->vertex_tex_cache[i]);
  58       }
  59       for (i = 0; i < softpipe->num_geometry_sampler_views; i++) {
  60          sp_flush_tex_tile_cache(softpipe->geometry_tex_cache[i]);
  61       }
  62    }
  63
  64    if (flags & PIPE_FLUSH_SWAPBUFFERS) {
  65       /* If this is a swapbuffers, just flush color buffers.
  66        *
  67        * The zbuffer changes are not discarded, but held in the cache
  68        * in the hope that a later clear will wipe them out.
  69        */
  70       for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++)
  71          if (softpipe->cbuf_cache[i])
  72             sp_flush_tile_cache(softpipe->cbuf_cache[i]);
  73
  74       /* Need this call for hardware buffers before swapbuffers.
  75        *
  76        * there should probably be another/different flush-type function
  77        * that's called before swapbuffers because we don't always want
  78        * to unmap surfaces when flushing.
  79        */
  80       softpipe_unmap_transfers(softpipe);
  81    }
  82    else if (flags & PIPE_FLUSH_RENDER_CACHE) {
  83       for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++)
  84          if (softpipe->cbuf_cache[i])
  85             sp_flush_tile_cache(softpipe->cbuf_cache[i]);
  86
  87       if (softpipe->zsbuf_cache)
  88          sp_flush_tile_cache(softpipe->zsbuf_cache);
  89
  90       softpipe->dirty_render_cache = FALSE;
  91    }
  92
  93    /* Enable to dump BMPs of the color/depth buffers each frame */
  94 #if 0
  95    if(flags & PIPE_FLUSH_FRAME) {
  96       static unsigned frame_no = 1;
  97       static char filename[256];
  98       util_snprintf(filename, sizeof(filename), "cbuf_%u.bmp", frame_no);
  99       debug_dump_surface_bmp(softpipe, filename, softpipe->framebuffer.cbufs[0]);
 100       util_snprintf(filename, sizeof(filename), "zsbuf_%u.bmp", frame_no);
 101       debug_dump_surface_bmp(softpipe, filename, softpipe->framebuffer.zsbuf);
 102       ++frame_no;
 103    }
 104 #endif
 105
 106    if (fence)
 107       *fence = NULL;
 108 }
 109
 110
 111 /**
 112  * Flush context if necessary.
 113  *
 114  * Returns FALSE if it would have block, but do_not_block was set, TRUE
 115  * otherwise.
 116  *
 117  * TODO: move this logic to an auxiliary library?
 118  */
 119 boolean
 120 softpipe_flush_resource(struct pipe_context *pipe,
 121                         struct pipe_resource *texture,
 122                         unsigned face,
 123                         unsigned level,
 124                         unsigned flush_flags,
 125                         boolean read_only,
 126                         boolean cpu_access,
 127                         boolean do_not_block)
 128 {
 129    unsigned referenced;
 130
 131    referenced = pipe->is_resource_referenced(pipe, texture, face, level);
 132
 133    if ((referenced & PIPE_REFERENCED_FOR_WRITE) ||
 134        ((referenced & PIPE_REFERENCED_FOR_READ) && !read_only)) {
 135
 136       /*
 137        * TODO: The semantics of these flush flags are too obtuse. They should
 138        * disappear and the pipe driver should just ensure that all visible
 139        * side-effects happen when they need to happen.
 140        */
 141       if (referenced & PIPE_REFERENCED_FOR_WRITE)
 142          flush_flags |= PIPE_FLUSH_RENDER_CACHE;
 143
 144       if (referenced & PIPE_REFERENCED_FOR_READ)
 145          flush_flags |= PIPE_FLUSH_TEXTURE_CACHE;
 146
 147       if (cpu_access) {
 148          /*
 149           * Flush and wait.
 150           */
 151
 152          struct pipe_fence_handle *fence = NULL;
 153
 154          if (do_not_block)
 155             return FALSE;
 156
 157          pipe->flush(pipe, flush_flags, &fence);
 158
 159          if (fence) {
 160             /*
 161              * This is for illustrative purposes only, as softpipe does not
 162              * have fences.
 163              */
 164             pipe->screen->fence_finish(pipe->screen, fence, 0);
 165             pipe->screen->fence_reference(pipe->screen, &fence, NULL);
 166          }
 167       } else {
 168          /*
 169           * Just flush.
 170           */
 171
 172          pipe->flush(pipe, flush_flags, NULL);
 173       }
 174    }
 175
 176    return TRUE;
 177 }