src/mesa/state_tracker/st_atom_framebuffer.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  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   *   Brian Paul
  32   */
  33
  34 #include "st_context.h"
  35 #include "st_atom.h"
  36 #include "pipe/p_context.h"
  37
  38
  39 /**
  40  * Update framebuffer state (color, depth, stencil, etc. buffers)
  41  * XXX someday: separate draw/read buffers.
  42  */
  43 static void
  44 update_framebuffer_state( struct st_context *st )
  45 {
  46    struct pipe_framebuffer_state framebuffer;
  47    struct gl_renderbuffer *rb;
  48    GLuint i;
  49
  50    memset(&framebuffer, 0, sizeof(framebuffer));
  51
  52    /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
  53     * to determine which surfaces to draw to
  54     */
  55    framebuffer.num_cbufs = st->ctx->DrawBuffer->_NumColorDrawBuffers[0];
  56    for (i = 0; i < framebuffer.num_cbufs; i++) {
  57       rb = st->ctx->DrawBuffer->_ColorDrawBuffers[0][i];
  58       assert(rb->surface);
  59       framebuffer.cbufs[i] = rb->surface;
  60    }
  61
  62    rb = st->ctx->DrawBuffer->_DepthBuffer;
  63    if (rb) {
  64       assert(rb->surface);
  65       framebuffer.zbuf = rb->Wrapped->surface;
  66    }
  67
  68    rb = st->ctx->DrawBuffer->_StencilBuffer;
  69    if (rb) {
  70       assert(rb->surface);
  71       framebuffer.sbuf = rb->Wrapped->surface;
  72    }
  73
  74    if (memcmp(&framebuffer, &st->state.framebuffer, sizeof(framebuffer)) != 0) {
  75       st->state.framebuffer = framebuffer;
  76       st->pipe->set_framebuffer_state( st->pipe, &framebuffer );
  77    }
  78 }
  79
  80
  81 const struct st_tracked_state st_update_framebuffer = {
  82    .dirty = {
  83       .mesa = _NEW_BUFFERS,
  84       .st  = 0,
  85    },
  86    .update = update_framebuffer_state
  87 };
  88