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
  42
  43 void
  44 softpipe_flush( struct pipe_context *pipe,
  45                 unsigned flags,
  46                 struct pipe_fence_handle **fence )
  47 {
  48    struct softpipe_context *softpipe = softpipe_context(pipe);
  49    uint i;
  50
  51    draw_flush(softpipe->draw);
  52
  53    if (flags & PIPE_FLUSH_TEXTURE_CACHE) {
  54       for (i = 0; i < softpipe->num_sampler_views; i++) {
  55          sp_flush_tex_tile_cache(softpipe->tex_cache[i]);
  56       }
  57       for (i = 0; i < softpipe->num_vertex_sampler_views; i++) {
  58          sp_flush_tex_tile_cache(softpipe->vertex_tex_cache[i]);
  59       }
  60       for (i = 0; i < softpipe->num_geometry_sampler_views; i++) {
  61          sp_flush_tex_tile_cache(softpipe->geometry_tex_cache[i]);
  62       }
  63    }
  64
  65    if (flags & PIPE_FLUSH_SWAPBUFFERS) {
  66       /* If this is a swapbuffers, just flush color buffers.
  67        *
  68        * The zbuffer changes are not discarded, but held in the cache
  69        * in the hope that a later clear will wipe them out.
  70        */
  71       for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++)
  72          if (softpipe->cbuf_cache[i])
  73             sp_flush_tile_cache(softpipe->cbuf_cache[i]);
  74
  75       /* Need this call for hardware buffers before swapbuffers.
  76        *
  77        * there should probably be another/different flush-type function
  78        * that's called before swapbuffers because we don't always want
  79        * to unmap surfaces when flushing.
  80        */
  81       softpipe_unmap_transfers(softpipe);
  82    }
  83    else if (flags & PIPE_FLUSH_RENDER_CACHE) {
  84       for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++)
  85          if (softpipe->cbuf_cache[i])
  86             sp_flush_tile_cache(softpipe->cbuf_cache[i]);
  87
  88       if (softpipe->zsbuf_cache)
  89          sp_flush_tile_cache(softpipe->zsbuf_cache);
  90
  91       softpipe->dirty_render_cache = FALSE;
  92    }
  93
  94    /* Enable to dump BMPs of the color/depth buffers each frame */
  95 #if 0
  96    if(flags & PIPE_FLUSH_FRAME) {
  97       static unsigned frame_no = 1;
  98       static char filename[256];
  99       util_snprintf(filename, sizeof(filename), "cbuf_%u.bmp", frame_no);
 100       debug_dump_surface_bmp(softpipe, filename, softpipe->framebuffer.cbufs[0]);
 101       util_snprintf(filename, sizeof(filename), "zsbuf_%u.bmp", frame_no);
 102       debug_dump_surface_bmp(softpipe, filename, softpipe->framebuffer.zsbuf);
 103       ++frame_no;
 104    }
 105 #endif
 106
 107    if (fence)
 108       *fence = NULL;
 109 }
 110
 111
 112 /**
 113  * Flush context if necessary.
 114  *
 115  * Returns FALSE if it would have block, but do_not_block was set, TRUE
 116  * otherwise.
 117  *
 118  * TODO: move this logic to an auxiliary library?
 119  */
 120 boolean
 121 softpipe_flush_resource(struct pipe_context *pipe,
 122                         struct pipe_resource *texture,
 123                         unsigned face,
 124                         unsigned level,
 125                         unsigned flush_flags,
 126                         boolean read_only,
 127                         boolean cpu_access,
 128                         boolean do_not_block)
 129 {
 130    unsigned referenced;
 131
 132    referenced = pipe->is_resource_referenced(pipe, texture, face, level);
 133
 134    if ((referenced & PIPE_REFERENCED_FOR_WRITE) ||
 135        ((referenced & PIPE_REFERENCED_FOR_READ) && !read_only)) {
 136
 137       /*
 138        * TODO: The semantics of these flush flags are too obtuse. They should
 139        * disappear and the pipe driver should just ensure that all visible
 140        * side-effects happen when they need to happen.
 141        */
 142       if (referenced & PIPE_REFERENCED_FOR_WRITE)
 143          flush_flags |= PIPE_FLUSH_RENDER_CACHE;
 144
 145       if (referenced & PIPE_REFERENCED_FOR_READ)
 146          flush_flags |= PIPE_FLUSH_TEXTURE_CACHE;
 147
 148       if (cpu_access) {
 149          /*
 150           * Flush and wait.
 151           */
 152
 153          struct pipe_fence_handle *fence = NULL;
 154
 155          if (do_not_block)
 156             return FALSE;
 157
 158          pipe->flush(pipe, flush_flags, &fence);
 159
 160          if (fence) {
 161             /*
 162              * This is for illustrative purposes only, as softpipe does not
 163              * have fences.
 164              */
 165             pipe->screen->fence_finish(pipe->screen, fence, 0);
 166             pipe->screen->fence_reference(pipe->screen, &fence, NULL);
 167          }
 168       } else {
 169          /*
 170           * Just flush.
 171           */
 172
 173          pipe->flush(pipe, flush_flags, NULL);
 174       }
 175    }
 176
 177    return TRUE;
 178 }