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 "draw/draw_context.h"
  35 #include "lp_flush.h"
  36 #include "lp_context.h"
  37 #include "lp_setup.h"
  38
  39
  40 void
  41 llvmpipe_flush( struct pipe_context *pipe,
  42                 unsigned flags,
  43                 struct pipe_fence_handle **fence )
  44 {
  45    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  46
  47    draw_flush(llvmpipe->draw);
  48
  49    if (fence) {
  50       if ((flags & (PIPE_FLUSH_SWAPBUFFERS |
  51                     PIPE_FLUSH_RENDER_CACHE))) {
  52          /* if we're going to flush the setup/rasterization modules, emit
  53           * a fence.
  54           * XXX this (and the code below) may need fine tuning...
  55           */
  56          *fence = lp_setup_fence( llvmpipe->setup );
  57       }
  58       else {
  59          *fence = NULL;
  60       }
  61    }
  62
  63    /* XXX the lp_setup_flush(flags) param is not a bool, and it's ignored
  64     * at this time!
  65     */
  66    if (flags & PIPE_FLUSH_SWAPBUFFERS) {
  67       lp_setup_flush( llvmpipe->setup, FALSE );
  68    }
  69    else if (flags & PIPE_FLUSH_RENDER_CACHE) {
  70       lp_setup_flush( llvmpipe->setup, TRUE );
  71    }
  72
  73    /* Enable to dump BMPs of the color/depth buffers each frame */
  74 #if 0
  75    if (flags & PIPE_FLUSH_FRAME) {
  76       static unsigned frame_no = 1;
  77       char filename[256];
  78       unsigned i;
  79
  80       for (i = 0; i < llvmpipe->framebuffer.nr_cbufs; i++) {
  81          util_snprintf(filename, sizeof(filename), "cbuf%u_%u", i, frame_no);
  82          debug_dump_surface_bmp(&llvmpipe->pipe, filename, llvmpipe->framebuffer.cbufs[0]);
  83       }
  84
  85       if (0) {
  86          util_snprintf(filename, sizeof(filename), "zsbuf_%u", frame_no);
  87          debug_dump_surface_bmp(&llvmpipe->pipe, filename, llvmpipe->framebuffer.zsbuf);
  88       }
  89
  90       ++frame_no;
  91    }
  92 #endif
  93 }
  94
  95
  96 /**
  97  * Flush context if necessary.
  98  *
  99  * TODO: move this logic to an auxiliary library?
 100  *
 101  * FIXME: We must implement DISCARD/DONTBLOCK/UNSYNCHRONIZED/etc for
 102  * textures to avoid blocking.
 103  */
 104 boolean
 105 llvmpipe_flush_texture(struct pipe_context *pipe,
 106                        struct pipe_texture *texture,
 107                        unsigned face,
 108                        unsigned level,
 109                        unsigned flush_flags,
 110                        boolean read_only,
 111                        boolean cpu_access,
 112                        boolean do_not_flush)
 113 {
 114    struct pipe_fence_handle *last_fence = NULL;
 115    unsigned referenced;
 116
 117    referenced = pipe->is_texture_referenced(pipe, texture, face, level);
 118
 119    if ((referenced & PIPE_REFERENCED_FOR_WRITE) ||
 120        ((referenced & PIPE_REFERENCED_FOR_READ) && !read_only)) {
 121
 122       if (do_not_flush)
 123          return FALSE;
 124
 125       /*
 126        * TODO: The semantics of these flush flags are too obtuse. They should
 127        * disappear and the pipe driver should just ensure that all visible
 128        * side-effects happen when they need to happen.
 129        */
 130       if (referenced & PIPE_REFERENCED_FOR_WRITE)
 131          flush_flags |= PIPE_FLUSH_RENDER_CACHE;
 132
 133       if (referenced & PIPE_REFERENCED_FOR_READ)
 134          flush_flags |= PIPE_FLUSH_TEXTURE_CACHE;
 135
 136       if (cpu_access) {
 137          /*
 138           * Flush and wait.
 139           */
 140
 141          struct pipe_fence_handle *fence = NULL;
 142
 143          pipe->flush(pipe, flush_flags, &fence);
 144
 145          if (last_fence) {
 146             pipe->screen->fence_finish(pipe->screen, fence, 0);
 147             pipe->screen->fence_reference(pipe->screen, &fence, NULL);
 148          }
 149       } else {
 150          /*
 151           * Just flush.
 152           */
 153
 154          pipe->flush(pipe, flush_flags, NULL);
 155       }
 156    }
 157
 158    return TRUE;
 159 }