src/mesa/state_tracker/st_cb_flush.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   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,
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  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 VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  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  /*
  29   * Authors:
  30   *   Keith Whitwell <keithw@vmware.com>
  31   *   Brian Paul
  32   */
  33
  34 #include "main/glheader.h"
  35 #include "main/macros.h"
  36 #include "main/context.h"
  37 #include "st_context.h"
  38 #include "st_cb_bitmap.h"
  39 #include "st_cb_flush.h"
  40 #include "st_cb_clear.h"
  41 #include "st_cb_fbo.h"
  42 #include "st_manager.h"
  43 #include "pipe/p_context.h"
  44 #include "pipe/p_defines.h"
  45 #include "pipe/p_screen.h"
  46 #include "util/u_gen_mipmap.h"
  47
  48
  49 void st_flush(struct st_context *st,
  50               struct pipe_fence_handle **fence,
  51               unsigned flags)
  52 {
  53    FLUSH_VERTICES(st->ctx, 0);
  54    FLUSH_CURRENT(st->ctx, 0);
  55
  56    st_flush_bitmap_cache(st);
  57
  58    st->pipe->flush(st->pipe, fence, flags);
  59 }
  60
  61
  62 /**
  63  * Flush, and wait for completion.
  64  */
  65 void st_finish( struct st_context *st )
  66 {
  67    struct pipe_fence_handle *fence = NULL;
  68
  69    st_flush(st, &fence, 0);
  70
  71    if(fence) {
  72       st->pipe->screen->fence_finish(st->pipe->screen, NULL, fence,
  73                                      PIPE_TIMEOUT_INFINITE);
  74       st->pipe->screen->fence_reference(st->pipe->screen, &fence, NULL);
  75    }
  76 }
  77
  78
  79
  80 /**
  81  * Called via ctx->Driver.Flush()
  82  */
  83 static void st_glFlush(struct gl_context *ctx)
  84 {
  85    struct st_context *st = st_context(ctx);
  86
  87    /* Don't call st_finish() here.  It is not the state tracker's
  88     * responsibilty to inject sleeps in the hope of avoiding buffer
  89     * synchronization issues.  Calling finish() here will just hide
  90     * problems that need to be fixed elsewhere.
  91     */
  92    st_flush(st, NULL, 0);
  93
  94    st_manager_flush_frontbuffer(st);
  95 }
  96
  97
  98 /**
  99  * Called via ctx->Driver.Finish()
 100  */
 101 static void st_glFinish(struct gl_context *ctx)
 102 {
 103    struct st_context *st = st_context(ctx);
 104
 105    st_finish(st);
 106
 107    st_manager_flush_frontbuffer(st);
 108 }
 109
 110
 111 static GLenum
 112 gl_reset_status_from_pipe_reset_status(enum pipe_reset_status status)
 113 {
 114    switch (status) {
 115    case PIPE_NO_RESET:
 116       return GL_NO_ERROR;
 117    case PIPE_GUILTY_CONTEXT_RESET:
 118       return GL_GUILTY_CONTEXT_RESET_ARB;
 119    case PIPE_INNOCENT_CONTEXT_RESET:
 120       return GL_INNOCENT_CONTEXT_RESET_ARB;
 121    case PIPE_UNKNOWN_CONTEXT_RESET:
 122       return GL_UNKNOWN_CONTEXT_RESET_ARB;
 123    default:
 124       assert(0);
 125       return GL_NO_ERROR;
 126    }
 127 }
 128
 129
 130 /**
 131  * Query information about GPU resets observed by this context
 132  *
 133  * Called via \c dd_function_table::GetGraphicsResetStatus.
 134  */
 135 static GLenum
 136 st_get_graphics_reset_status(struct gl_context *ctx)
 137 {
 138    struct st_context *st = st_context(ctx);
 139    enum pipe_reset_status status;
 140
 141    if (st->reset_status != PIPE_NO_RESET) {
 142       status = st->reset_status;
 143       st->reset_status = PIPE_NO_RESET;
 144    } else {
 145       status = st->pipe->get_device_reset_status(st->pipe);
 146    }
 147
 148    return gl_reset_status_from_pipe_reset_status(status);
 149 }
 150
 151
 152 static void
 153 st_device_reset_callback(void *data, enum pipe_reset_status status)
 154 {
 155    struct st_context *st = data;
 156
 157    assert(status != PIPE_NO_RESET);
 158
 159    st->reset_status = status;
 160    _mesa_set_context_lost_dispatch(st->ctx);
 161 }
 162
 163
 164 void
 165 st_install_device_reset_callback(struct st_context *st)
 166 {
 167    if (st->pipe->set_device_reset_callback) {
 168       struct pipe_device_reset_callback cb;
 169       cb.reset = st_device_reset_callback;
 170       cb.data = st;
 171       st->pipe->set_device_reset_callback(st->pipe, &cb);
 172    }
 173 }
 174
 175
 176 void st_init_flush_functions(struct pipe_screen *screen,
 177                              struct dd_function_table *functions)
 178 {
 179    functions->Flush = st_glFlush;
 180    functions->Finish = st_glFinish;
 181
 182    if (screen->get_param(screen, PIPE_CAP_DEVICE_RESET_STATUS_QUERY))
 183       functions->GetGraphicsResetStatus = st_get_graphics_reset_status;
 184
 185    /* Windows opengl32.dll calls glFinish prior to every swapbuffers.
 186     * This is unnecessary and degrades performance.  Luckily we have some
 187     * scope to work around this, as the externally-visible behaviour of
 188     * Finish() is identical to Flush() in all cases - no differences in
 189     * rendering or ReadPixels are visible if we opt not to wait here.
 190     *
 191     * Only set this up on Windows to avoid surprise elsewhere.
 192     */
 193 #ifdef PIPE_OS_WINDOWS
 194    functions->Finish = st_glFlush;
 195 #endif
 196 }