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, j;
  52
  53    memset(framebuffer, 0, sizeof(*framebuffer));
  54
  55    framebuffer->width = fb->Width;
  56    framebuffer->height = fb->Height;
  57
  58    /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
  59     * to determine which surfaces to draw to
  60     */
  61    framebuffer->num_cbufs = 0;
  62    for (j = 0; j < MAX_DRAW_BUFFERS; j++) {
  63       for (i = 0; i < fb->_NumColorDrawBuffers[j]; i++) {
  64          strb = st_renderbuffer(fb->_ColorDrawBuffers[j][i]);
  65          assert(strb->surface);
  66          framebuffer->cbufs[framebuffer->num_cbufs] = strb->surface;
  67          framebuffer->num_cbufs++;
  68       }
  69    }
  70
  71    strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
  72    if (strb) {
  73       strb = st_renderbuffer(strb->Base.Wrapped);
  74       assert(strb->surface);
  75       framebuffer->zsbuf = strb->surface;
  76    }
  77    else {
  78       strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
  79       if (strb) {
  80          strb = st_renderbuffer(strb->Base.Wrapped);
  81          assert(strb->surface);
  82          framebuffer->zsbuf = strb->surface;
  83       }
  84    }
  85
  86    cso_set_framebuffer(st->cso_context, framebuffer);
  87
  88    if (fb->_ColorDrawBufferMask[0] & BUFFER_BIT_FRONT_LEFT) {
  89       if (st->frontbuffer_status == FRONT_STATUS_COPY_OF_BACK) {
  90          /* XXX copy back buf to front? */
  91       }
  92       /* we're assuming we'll really draw to the front buffer */
  93       st->frontbuffer_status = FRONT_STATUS_DIRTY;
  94    }
  95 }
  96
  97
  98 const struct st_tracked_state st_update_framebuffer = {
  99    .name = "st_update_framebuffer",
 100    .dirty = {
 101       .mesa = _NEW_BUFFERS,
 102       .st  = 0,
 103    },
 104    .update = update_framebuffer_state
 105 };
 106