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 * When doing GL render to texture, we have to be sure that finalize_texture()
48 * didn't yank out the pipe_resource that we earlier created a surface for.
49 * Check for that here and create a new surface if needed.
50 */
51static void
52update_renderbuffer_surface(struct st_context *st,
53                            struct st_renderbuffer *strb)
54{
55   struct pipe_context *pipe = st->pipe;
56   struct pipe_resource *resource = strb->rtt ? strb->rtt->pt : strb->texture;
57   int rtt_width = strb->Base.Width;
58   int rtt_height = strb->Base.Height;
59   enum pipe_format format = st->ctx->Color.sRGBEnabled ? resource->format : util_format_linear(resource->format);
60
61   if (!strb->surface ||
62       strb->surface->format != format ||
63       strb->surface->texture != resource ||
64       strb->surface->width != rtt_width ||
65       strb->surface->height != rtt_height) {
66      GLuint level;
67      /* find matching mipmap level size */
68      for (level = 0; level <= resource->last_level; level++) {
69         if (u_minify(resource->width0, level) == rtt_width &&
70             u_minify(resource->height0, level) == rtt_height) {
71            struct pipe_surface surf_tmpl;
72            memset(&surf_tmpl, 0, sizeof(surf_tmpl));
73            surf_tmpl.format = format;
74            surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
75            surf_tmpl.u.tex.level = level;
76            surf_tmpl.u.tex.first_layer = strb->rtt_face + strb->rtt_slice;
77            surf_tmpl.u.tex.last_layer = strb->rtt_face + strb->rtt_slice;
78
79            pipe_surface_reference(&strb->surface, NULL);
80
81            strb->surface = pipe->create_surface(pipe,
82                                                 resource,
83                                                 &surf_tmpl);
84#if 0
85            printf("-- alloc new surface %d x %d into tex %p\n",
86                   strb->surface->width, strb->surface->height,
87                   texture);
88#endif
89            break;
90         }
91      }
92   }
93}
94
95
96/**
97 * Update framebuffer state (color, depth, stencil, etc. buffers)
98 */
99static void
100update_framebuffer_state( struct st_context *st )
101{
102   struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer;
103   struct gl_framebuffer *fb = st->ctx->DrawBuffer;
104   struct st_renderbuffer *strb;
105   GLuint i;
106
107   st_flush_bitmap_cache(st);
108
109   st->state.fb_orientation = st_fb_orientation(fb);
110   framebuffer->width = fb->Width;
111   framebuffer->height = fb->Height;
112
113   /*printf("------ fb size %d x %d\n", fb->Width, fb->Height);*/
114
115   /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
116    * to determine which surfaces to draw to
117    */
118   framebuffer->nr_cbufs = 0;
119   for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
120      strb = st_renderbuffer(fb->_ColorDrawBuffers[i]);
121
122      if (strb) {
123         /*printf("--------- framebuffer surface rtt %p\n", strb->rtt);*/
124         if (strb->rtt ||
125             (strb->texture && util_format_is_srgb(strb->texture->format))) {
126            /* rendering to a GL texture, may have to update surface */
127            update_renderbuffer_surface(st, strb);
128         }
129
130         if (strb->surface) {
131            pipe_surface_reference(&framebuffer->cbufs[framebuffer->nr_cbufs],
132                                   strb->surface);
133            framebuffer->nr_cbufs++;
134         }
135         strb->defined = GL_TRUE; /* we'll be drawing something */
136      }
137   }
138   for (i = framebuffer->nr_cbufs; i < PIPE_MAX_COLOR_BUFS; i++) {
139      pipe_surface_reference(&framebuffer->cbufs[i], NULL);
140   }
141
142   /*
143    * Depth/Stencil renderbuffer/surface.
144    */
145   strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
146   if (strb) {
147      if (strb->rtt) {
148         /* rendering to a GL texture, may have to update surface */
149         update_renderbuffer_surface(st, strb);
150      }
151      pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
152   }
153   else {
154      strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
155      if (strb) {
156         assert(strb->surface);
157         pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
158      }
159      else
160         pipe_surface_reference(&framebuffer->zsbuf, NULL);
161   }
162
163#ifdef DEBUG
164   /* Make sure the resource binding flags were set properly */
165   for (i = 0; i < framebuffer->nr_cbufs; i++) {
166      assert(framebuffer->cbufs[i]->texture->bind & PIPE_BIND_RENDER_TARGET);
167   }
168   if (framebuffer->zsbuf) {
169      assert(framebuffer->zsbuf->texture->bind & PIPE_BIND_DEPTH_STENCIL);
170   }
171#endif
172
173   cso_set_framebuffer(st->cso_context, framebuffer);
174}
175
176
177const struct st_tracked_state st_update_framebuffer = {
178   "st_update_framebuffer",				/* name */
179   {							/* dirty */
180      _NEW_BUFFERS,					/* mesa */
181      ST_NEW_FRAMEBUFFER,				/* st */
182   },
183   update_framebuffer_state				/* update */
184};
185
186