1 /**************************************************************************
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
29 #include "main/imports.h"
30 #include "main/buffers.h"
31 #include "main/context.h"
32 #include "main/framebuffer.h"
33 #include "main/matrix.h"
34 #include "main/renderbuffer.h"
35 #include "main/scissor.h"
36 #include "st_public.h"
37 #include "st_context.h"
38 #include "st_cb_fbo.h"
39 #include "pipe/p_defines.h"
40 #include "pipe/p_context.h"
41 #include "pipe/p_inlines.h"
44 struct st_framebuffer
*
45 st_create_framebuffer( const __GLcontextModes
*visual
,
46 enum pipe_format colorFormat
,
47 enum pipe_format depthFormat
,
48 enum pipe_format stencilFormat
,
49 uint width
, uint height
,
52 struct st_framebuffer
*stfb
= CALLOC_STRUCT(st_framebuffer
);
54 int samples
= st_get_msaa();
56 if (visual
->sampleBuffers
)
57 samples
= visual
->samples
;
59 _mesa_initialize_framebuffer(&stfb
->Base
, visual
);
62 /* fake frontbuffer */
63 /* XXX allocation should only happen in the unusual case
64 it's actually needed */
65 struct gl_renderbuffer
*rb
66 = st_new_renderbuffer_fb(colorFormat
, samples
);
67 _mesa_add_renderbuffer(&stfb
->Base
, BUFFER_FRONT_LEFT
, rb
);
70 if (visual
->doubleBufferMode
) {
71 struct gl_renderbuffer
*rb
72 = st_new_renderbuffer_fb(colorFormat
, samples
);
73 _mesa_add_renderbuffer(&stfb
->Base
, BUFFER_BACK_LEFT
, rb
);
76 if (depthFormat
== stencilFormat
&& depthFormat
!= PIPE_FORMAT_NONE
) {
77 /* combined depth/stencil buffer */
78 struct gl_renderbuffer
*depthStencilRb
79 = st_new_renderbuffer_fb(depthFormat
, samples
);
80 /* note: bind RB to two attachment points */
81 _mesa_add_renderbuffer(&stfb
->Base
, BUFFER_DEPTH
, depthStencilRb
);
82 _mesa_add_renderbuffer(&stfb
->Base
, BUFFER_STENCIL
, depthStencilRb
);
85 /* separate depth and/or stencil */
87 if (visual
->depthBits
== 32) {
88 /* 32-bit depth buffer */
89 struct gl_renderbuffer
*depthRb
90 = st_new_renderbuffer_fb(depthFormat
, samples
);
91 _mesa_add_renderbuffer(&stfb
->Base
, BUFFER_DEPTH
, depthRb
);
93 else if (visual
->depthBits
== 24) {
94 /* 24-bit depth buffer, ignore stencil bits */
95 struct gl_renderbuffer
*depthRb
96 = st_new_renderbuffer_fb(depthFormat
, samples
);
97 _mesa_add_renderbuffer(&stfb
->Base
, BUFFER_DEPTH
, depthRb
);
99 else if (visual
->depthBits
> 0) {
100 /* 16-bit depth buffer */
101 struct gl_renderbuffer
*depthRb
102 = st_new_renderbuffer_fb(depthFormat
, samples
);
103 _mesa_add_renderbuffer(&stfb
->Base
, BUFFER_DEPTH
, depthRb
);
106 if (visual
->stencilBits
> 0) {
108 struct gl_renderbuffer
*stencilRb
109 = st_new_renderbuffer_fb(stencilFormat
, samples
);
110 _mesa_add_renderbuffer(&stfb
->Base
, BUFFER_STENCIL
, stencilRb
);
114 if (visual
->accumRedBits
> 0) {
115 /* 16-bit/channel accum */
116 struct gl_renderbuffer
*accumRb
117 = st_new_renderbuffer_fb(DEFAULT_ACCUM_PIPE_FORMAT
, 0); /* XXX accum isn't multisampled right? */
118 _mesa_add_renderbuffer(&stfb
->Base
, BUFFER_ACCUM
, accumRb
);
121 stfb
->Base
.Initialized
= GL_TRUE
;
122 stfb
->InitWidth
= width
;
123 stfb
->InitHeight
= height
;
124 stfb
->Private
= private;
130 void st_resize_framebuffer( struct st_framebuffer
*stfb
,
131 uint width
, uint height
)
133 if (stfb
->Base
.Width
!= width
|| stfb
->Base
.Height
!= height
) {
134 GET_CURRENT_CONTEXT(ctx
);
136 if (stfb
->InitWidth
== 0 && stfb
->InitHeight
== 0) {
137 /* didn't have a valid size until now */
138 stfb
->InitWidth
= width
;
139 stfb
->InitHeight
= height
;
140 if (ctx
->Viewport
.Width
<= 1) {
141 /* set context's initial viewport/scissor size */
142 _mesa_set_viewport(ctx
, 0, 0, width
, height
);
143 _mesa_set_scissor(ctx
, 0, 0, width
, height
);
147 _mesa_resize_framebuffer(ctx
, &stfb
->Base
, width
, height
);
149 assert(stfb
->Base
.Width
== width
);
150 assert(stfb
->Base
.Height
== height
);
156 void st_unreference_framebuffer( struct st_framebuffer
**stfb
)
158 _mesa_unreference_framebuffer((struct gl_framebuffer
**) stfb
);
164 * Set/replace a framebuffer surface.
165 * The user of the state tracker can use this instead of
166 * st_resize_framebuffer() to provide new surfaces when a window is resized.
169 st_set_framebuffer_surface(struct st_framebuffer
*stfb
,
170 uint surfIndex
, struct pipe_surface
*surf
)
172 static const GLuint invalid_size
= 9999999;
173 struct st_renderbuffer
*strb
;
174 GLuint width
, height
, i
;
176 assert(surfIndex
< BUFFER_COUNT
);
178 strb
= st_renderbuffer(stfb
->Base
.Attachment
[surfIndex
].Renderbuffer
);
181 /* replace the renderbuffer's surface/texture pointers */
182 pipe_surface_reference( &strb
->surface
, surf
);
183 pipe_texture_reference( &strb
->texture
, surf
->texture
);
185 /* update renderbuffer's width/height */
186 strb
->Base
.Width
= surf
->width
;
187 strb
->Base
.Height
= surf
->height
;
189 /* Try to update the framebuffer's width/height from the renderbuffer
190 * sizes. Before we start drawing, all the rbs _should_ be the same size.
192 width
= height
= invalid_size
;
193 for (i
= 0; i
< BUFFER_COUNT
; i
++) {
194 if (stfb
->Base
.Attachment
[i
].Renderbuffer
) {
195 if (width
== invalid_size
) {
196 width
= stfb
->Base
.Attachment
[i
].Renderbuffer
->Width
;
197 height
= stfb
->Base
.Attachment
[i
].Renderbuffer
->Height
;
199 else if (width
!= stfb
->Base
.Attachment
[i
].Renderbuffer
->Width
||
200 height
!= stfb
->Base
.Attachment
[i
].Renderbuffer
->Height
) {
201 /* inconsistant renderbuffer sizes, bail out */
207 if (width
!= invalid_size
) {
208 /* OK, the renderbuffers are of a consistant size, so update the
209 * parent framebuffer's size.
211 stfb
->Base
.Width
= width
;
212 stfb
->Base
.Height
= height
;
219 * Return the pipe_surface for the given renderbuffer.
221 struct pipe_surface
*
222 st_get_framebuffer_surface(struct st_framebuffer
*stfb
, uint surfIndex
)
224 struct st_renderbuffer
*strb
;
226 assert(surfIndex
<= ST_SURFACE_DEPTH
);
228 /* sanity checks, ST tokens should match Mesa tokens */
229 assert(ST_SURFACE_FRONT_LEFT
== BUFFER_FRONT_LEFT
);
230 assert(ST_SURFACE_BACK_RIGHT
== BUFFER_BACK_RIGHT
);
232 strb
= st_renderbuffer(stfb
->Base
.Attachment
[surfIndex
].Renderbuffer
);
234 return strb
->surface
;
238 struct pipe_texture
*
239 st_get_framebuffer_texture(struct st_framebuffer
*stfb
, uint surfIndex
)
241 struct st_renderbuffer
*strb
;
243 assert(surfIndex
<= ST_SURFACE_DEPTH
);
245 /* sanity checks, ST tokens should match Mesa tokens */
246 assert(ST_SURFACE_FRONT_LEFT
== BUFFER_FRONT_LEFT
);
247 assert(ST_SURFACE_BACK_RIGHT
== BUFFER_BACK_RIGHT
);
249 strb
= st_renderbuffer(stfb
->Base
.Attachment
[surfIndex
].Renderbuffer
);
251 return strb
->texture
;
256 * This function is to be called prior to SwapBuffers on the given
257 * framebuffer. It checks if the current context is bound to the framebuffer
258 * and flushes rendering if needed.
261 st_notify_swapbuffers(struct st_framebuffer
*stfb
)
263 GET_CURRENT_CONTEXT(ctx
);
265 if (ctx
&& ctx
->DrawBuffer
== &stfb
->Base
) {
267 PIPE_FLUSH_RENDER_CACHE
|
268 PIPE_FLUSH_SWAPBUFFERS
|
271 ctx
->st
->frontbuffer_status
= FRONT_STATUS_COPY_OF_BACK
;
277 * Quick hack - allows the winsys to inform the driver that surface
278 * states are now undefined after a glXSwapBuffers or similar.
281 st_notify_swapbuffers_complete(struct st_framebuffer
*stfb
)
283 GET_CURRENT_CONTEXT(ctx
);
285 if (ctx
&& ctx
->DrawBuffer
== &stfb
->Base
) {
286 struct st_renderbuffer
*strb
;
289 for (i
= 0; i
< BUFFER_COUNT
; i
++) {
290 if (stfb
->Base
.Attachment
[i
].Renderbuffer
) {
291 strb
= st_renderbuffer(stfb
->Base
.Attachment
[i
].Renderbuffer
);
292 strb
->surface
->status
= PIPE_SURFACE_STATUS_UNDEFINED
;
299 void *st_framebuffer_private( struct st_framebuffer
*stfb
)
301 return stfb
->Private
;