src/gallium/drivers/llvmpipe/lp_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 "util/u_string.h"
  35 #include "draw/draw_context.h"
  36 #include "lp_flush.h"
  37 #include "lp_context.h"
  38 #include "lp_setup.h"
  39
  40
  41 /**
  42  * \param flags  bitmask of PIPE_FLUSH_x flags
  43  * \param fence  if non-null, returns pointer to a fench which can be waited on
  44  */
  45 void
  46 llvmpipe_flush( struct pipe_context *pipe,
  47                 unsigned flags,
  48                 struct pipe_fence_handle **fence )
  49 {
  50    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  51
  52    draw_flush(llvmpipe->draw);
  53
  54    if (fence) {
  55       if ((flags & (PIPE_FLUSH_SWAPBUFFERS |
  56                     PIPE_FLUSH_RENDER_CACHE))) {
  57          /* if we're going to flush the setup/rasterization modules, emit
  58           * a fence.
  59           * XXX this (and the code below) may need fine tuning...
  60           */
  61          *fence = lp_setup_fence( llvmpipe->setup );
  62       }
  63       else {
  64          *fence = NULL;
  65       }
  66    }
  67
  68    /* ask the setup module to flush */
  69    if (flags & (PIPE_FLUSH_SWAPBUFFERS | PIPE_FLUSH_RENDER_CACHE |
  70                 PIPE_FLUSH_TEXTURE_CACHE)) {
  71       lp_setup_flush(llvmpipe->setup, flags);
  72    }
  73
  74    /* Enable to dump BMPs of the color/depth buffers each frame */
  75    if (0) {
  76       if (flags & PIPE_FLUSH_FRAME) {
  77          static unsigned frame_no = 1;
  78          char filename[256];
  79          unsigned i;
  80
  81          for (i = 0; i < llvmpipe->framebuffer.nr_cbufs; i++) {
  82             util_snprintf(filename, sizeof(filename), "cbuf%u_%u", i, frame_no);
  83             debug_dump_surface_bmp(&llvmpipe->pipe, filename, llvmpipe->framebuffer.cbufs[0]);
  84          }
  85
  86          if (0) {
  87             util_snprintf(filename, sizeof(filename), "zsbuf_%u", frame_no);
  88             debug_dump_surface_bmp(&llvmpipe->pipe, filename, llvmpipe->framebuffer.zsbuf);
  89          }
  90
  91          ++frame_no;
  92       }
  93    }
  94 }
  95
  96
  97 /**
  98  * Flush context if necessary.
  99  *
 100  * Returns FALSE if it would have block, but do_not_block was set, TRUE
 101  * otherwise.
 102  *
 103  * TODO: move this logic to an auxiliary library?
 104  */
 105 boolean
 106 llvmpipe_flush_resource(struct pipe_context *pipe,
 107                         struct pipe_resource *resource,
 108                         unsigned face,
 109                         unsigned level,
 110                         unsigned flush_flags,
 111                         boolean read_only,
 112                         boolean cpu_access,
 113                         boolean do_not_block)
 114 {
 115    unsigned referenced;
 116
 117    referenced = pipe->is_resource_referenced(pipe, resource, face, level);
 118
 119    if ((referenced & PIPE_REFERENCED_FOR_WRITE) ||
 120        ((referenced & PIPE_REFERENCED_FOR_READ) && !read_only)) {
 121
 122       if (resource->target != PIPE_BUFFER) {
 123          /*
 124           * TODO: The semantics of these flush flags are too obtuse. They should
 125           * disappear and the pipe driver should just ensure that all visible
 126           * side-effects happen when they need to happen.
 127           */
 128          if (referenced & PIPE_REFERENCED_FOR_WRITE)
 129             flush_flags |= PIPE_FLUSH_RENDER_CACHE;
 130
 131          if (referenced & PIPE_REFERENCED_FOR_READ)
 132             flush_flags |= PIPE_FLUSH_TEXTURE_CACHE;
 133       }
 134
 135       if (cpu_access) {
 136          /*
 137           * Flush and wait.
 138           */
 139
 140          struct pipe_fence_handle *fence = NULL;
 141
 142          if (do_not_block)
 143             return FALSE;
 144
 145          pipe->flush(pipe, flush_flags, &fence);
 146
 147          if (fence) {
 148             pipe->screen->fence_finish(pipe->screen, fence, 0);
 149             pipe->screen->fence_reference(pipe->screen, &fence, NULL);
 150          }
 151       } else {
 152          /*
 153           * Just flush.
 154           */
 155
 156          pipe->flush(pipe, flush_flags, NULL);
 157       }
 158    }
 159
 160    return TRUE;
 161 }