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 "st_cb_fbo.h"
  37 #include "pipe/p_context.h"
  38 #include "cso_cache/cso_context.h"
  39
  40
  41 /**
  42  * Update framebuffer state (color, depth, stencil, etc. buffers)
  43  * XXX someday: separate draw/read buffers.
  44  */
  45 static void
  46 update_framebuffer_state( struct st_context *st )
  47 {
  48    struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer;
  49    struct gl_framebuffer *fb = st->ctx->DrawBuffer;
  50    struct st_renderbuffer *strb;
  51    GLuint i;
  52
  53    memset(framebuffer, 0, sizeof(*framebuffer));
  54
  55    /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
  56     * to determine which surfaces to draw to
  57     */
  58    framebuffer->num_cbufs = fb->_NumColorDrawBuffers[0];
  59    for (i = 0; i < framebuffer->num_cbufs; i++) {
  60       strb = st_renderbuffer(fb->_ColorDrawBuffers[0][i]);
  61       assert(strb->surface);
  62       framebuffer->cbufs[i] = strb->surface;
  63    }
  64
  65    strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
  66    if (strb) {
  67       strb = st_renderbuffer(strb->Base.Wrapped);
  68       assert(strb->surface);
  69       framebuffer->zsbuf = strb->surface;
  70    }
  71    else {
  72       strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
  73       if (strb) {
  74          strb = st_renderbuffer(strb->Base.Wrapped);
  75          assert(strb->surface);
  76          framebuffer->zsbuf = strb->surface;
  77       }
  78    }
  79
  80    cso_set_framebuffer(st->cso_context, framebuffer);
  81 }
  82
  83
  84 const struct st_tracked_state st_update_framebuffer = {
  85    .name = "st_update_framebuffer",
  86    .dirty = {
  87       .mesa = _NEW_BUFFERS,
  88       .st  = 0,
  89    },
  90    .update = update_framebuffer_state
  91 };
  92