st_atom_framebuffer.c revision 9baa45f78b8ca7d66280e36009b6a685055d7cd6 
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 */
49static void
50update_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 = fb->_NumColorDrawBuffers;
69
70   for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
71      pipe_surface_reference(&framebuffer->cbufs[i], NULL);
72
73      strb = st_renderbuffer(fb->_ColorDrawBuffers[i]);
74
75      if (strb) {
76         if (strb->is_rtt ||
77             (strb->texture && util_format_is_srgb(strb->texture->format))) {
78            /* rendering to a GL texture, may have to update surface */
79            st_update_renderbuffer_surface(st, strb);
80         }
81
82         if (strb->surface) {
83            pipe_surface_reference(&framebuffer->cbufs[i], strb->surface);
84         }
85         strb->defined = GL_TRUE; /* we'll be drawing something */
86      }
87   }
88
89   for (i = framebuffer->nr_cbufs; i < PIPE_MAX_COLOR_BUFS; i++) {
90      pipe_surface_reference(&framebuffer->cbufs[i], NULL);
91   }
92
93   /*
94    * Depth/Stencil renderbuffer/surface.
95    */
96   strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
97   if (strb) {
98      if (strb->is_rtt) {
99         /* rendering to a GL texture, may have to update surface */
100         st_update_renderbuffer_surface(st, strb);
101      }
102      pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
103   }
104   else {
105      strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
106      if (strb) {
107         assert(strb->surface);
108         pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
109      }
110      else
111         pipe_surface_reference(&framebuffer->zsbuf, NULL);
112   }
113
114#ifdef DEBUG
115   /* Make sure the resource binding flags were set properly */
116   for (i = 0; i < framebuffer->nr_cbufs; i++) {
117      assert(!framebuffer->cbufs[i] ||
118             framebuffer->cbufs[i]->texture->bind & PIPE_BIND_RENDER_TARGET);
119   }
120   if (framebuffer->zsbuf) {
121      assert(framebuffer->zsbuf->texture->bind & PIPE_BIND_DEPTH_STENCIL);
122   }
123#endif
124
125   cso_set_framebuffer(st->cso_context, framebuffer);
126}
127
128
129const struct st_tracked_state st_update_framebuffer = {
130   "st_update_framebuffer",				/* name */
131   {							/* dirty */
132      _NEW_BUFFERS,					/* mesa */
133      ST_NEW_FRAMEBUFFER,				/* st */
134   },
135   update_framebuffer_state				/* update */
136};
137
138