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 */
51 static void
update_renderbuffer_surface(struct st_context * st,struct st_renderbuffer * strb)52 update_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 */
99 static void
update_framebuffer_state(struct st_context * st)100 update_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
177 const 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