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_bitmap.h"
  37 #include "st_cb_fbo.h"
  38 #include "st_texture.h"
  39 #include "pipe/p_context.h"
  40 #include "cso_cache/cso_context.h"
  41 #include "util/u_math.h"
  42 #include "util/u_inlines.h"
  43 #include "util/u_format.h"
  44
  45
  46 /**
  47  * Update framebuffer state (color, depth, stencil, etc. buffers)
  48  */
  49 static void
  50 update_framebuffer_state( struct st_context *st )
  51 {
  52    struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer;
  53    struct gl_framebuffer *fb = st->ctx->DrawBuffer;
  54    struct st_renderbuffer *strb;
  55    GLuint i;
  56
  57    st_flush_bitmap_cache(st);
  58
  59    st->state.fb_orientation = st_fb_orientation(fb);
  60    framebuffer->width = fb->Width;
  61    framebuffer->height = fb->Height;
  62
  63    /*printf("------ fb size %d x %d\n", fb->Width, fb->Height);*/
  64
  65    /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
  66     * to determine which surfaces to draw to
  67     */
  68    framebuffer->nr_cbufs = 0;
  69    for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
  70       strb = st_renderbuffer(fb->_ColorDrawBuffers[i]);
  71
  72       if (strb) {
  73          /*printf("--------- framebuffer surface rtt %p\n", strb->rtt);*/
  74          if (strb->is_rtt ||
  75              (strb->texture && util_format_is_srgb(strb->texture->format))) {
  76             /* rendering to a GL texture, may have to update surface */
  77             st_update_renderbuffer_surface(st, strb);
  78          }
  79
  80          if (strb->surface) {
  81             pipe_surface_reference(&framebuffer->cbufs[framebuffer->nr_cbufs],
  82                                    strb->surface);
  83             framebuffer->nr_cbufs++;
  84          }
  85          strb->defined = GL_TRUE; /* we'll be drawing something */
  86       }
  87    }
  88    for (i = framebuffer->nr_cbufs; i < PIPE_MAX_COLOR_BUFS; i++) {
  89       pipe_surface_reference(&framebuffer->cbufs[i], NULL);
  90    }
  91
  92    /*
  93     * Depth/Stencil renderbuffer/surface.
  94     */
  95    strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
  96    if (strb) {
  97       if (strb->is_rtt) {
  98          /* rendering to a GL texture, may have to update surface */
  99          st_update_renderbuffer_surface(st, strb);
 100       }
 101       pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
 102    }
 103    else {
 104       strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
 105       if (strb) {
 106          assert(strb->surface);
 107          pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
 108       }
 109       else
 110          pipe_surface_reference(&framebuffer->zsbuf, NULL);
 111    }
 112
 113 #ifdef DEBUG
 114    /* Make sure the resource binding flags were set properly */
 115    for (i = 0; i < framebuffer->nr_cbufs; i++) {
 116       assert(framebuffer->cbufs[i]->texture->bind & PIPE_BIND_RENDER_TARGET);
 117    }
 118    if (framebuffer->zsbuf) {
 119       assert(framebuffer->zsbuf->texture->bind & PIPE_BIND_DEPTH_STENCIL);
 120    }
 121 #endif
 122
 123    cso_set_framebuffer(st->cso_context, framebuffer);
 124 }
 125
 126
 127 const struct st_tracked_state st_update_framebuffer = {
 128    "st_update_framebuffer",                             /* name */
 129    {                                                    /* dirty */
 130       _NEW_BUFFERS,                                     /* mesa */
 131       ST_NEW_FRAMEBUFFER,                               /* st */
 132    },
 133    update_framebuffer_state                             /* update */
 134 };
 135