1 /**************************************************************************
3 * Copyright 2007 VMware, Inc.
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 VMWARE 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 **************************************************************************/
30 * Keith Whitwell <keithw@vmware.com>
34 #include "main/glheader.h"
35 #include "main/macros.h"
36 #include "main/context.h"
37 #include "st_context.h"
38 #include "st_cb_bitmap.h"
39 #include "st_cb_flush.h"
40 #include "st_cb_clear.h"
41 #include "st_cb_fbo.h"
42 #include "st_manager.h"
43 #include "pipe/p_context.h"
44 #include "pipe/p_defines.h"
45 #include "pipe/p_screen.h"
46 #include "util/u_gen_mipmap.h"
49 /** Check if we have a front color buffer and if it's been drawn to. */
50 static inline GLboolean
51 is_front_buffer_dirty(struct st_context
*st
)
53 struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
54 struct st_renderbuffer
*strb
55 = st_renderbuffer(fb
->Attachment
[BUFFER_FRONT_LEFT
].Renderbuffer
);
56 return strb
&& strb
->defined
;
61 * Tell the screen to display the front color buffer on-screen.
64 display_front_buffer(struct st_context
*st
)
66 struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
67 struct st_renderbuffer
*strb
68 = st_renderbuffer(fb
->Attachment
[BUFFER_FRONT_LEFT
].Renderbuffer
);
71 /* Hook for copying "fake" frontbuffer if necessary:
73 st_manager_flush_frontbuffer(st
);
78 void st_flush(struct st_context
*st
,
79 struct pipe_fence_handle
**fence
,
82 FLUSH_VERTICES(st
->ctx
, 0);
83 FLUSH_CURRENT(st
->ctx
, 0);
85 st_flush_bitmap_cache(st
);
87 st
->pipe
->flush(st
->pipe
, fence
, flags
);
92 * Flush, and wait for completion.
94 void st_finish( struct st_context
*st
)
96 struct pipe_fence_handle
*fence
= NULL
;
98 st_flush(st
, &fence
, 0);
101 st
->pipe
->screen
->fence_finish(st
->pipe
->screen
, fence
,
102 PIPE_TIMEOUT_INFINITE
);
103 st
->pipe
->screen
->fence_reference(st
->pipe
->screen
, &fence
, NULL
);
110 * Called via ctx->Driver.Flush()
112 static void st_glFlush(struct gl_context
*ctx
)
114 struct st_context
*st
= st_context(ctx
);
116 /* Don't call st_finish() here. It is not the state tracker's
117 * responsibilty to inject sleeps in the hope of avoiding buffer
118 * synchronization issues. Calling finish() here will just hide
119 * problems that need to be fixed elsewhere.
121 st_flush(st
, NULL
, 0);
123 if (is_front_buffer_dirty(st
)) {
124 display_front_buffer(st
);
130 * Called via ctx->Driver.Finish()
132 static void st_glFinish(struct gl_context
*ctx
)
134 struct st_context
*st
= st_context(ctx
);
138 if (is_front_buffer_dirty(st
)) {
139 display_front_buffer(st
);
145 * Query information about GPU resets observed by this context
147 * Called via \c dd_function_table::GetGraphicsResetStatus.
150 st_get_graphics_reset_status(struct gl_context
*ctx
)
152 struct st_context
*st
= st_context(ctx
);
153 enum pipe_reset_status status
;
155 status
= st
->pipe
->get_device_reset_status(st
->pipe
);
160 case PIPE_GUILTY_CONTEXT_RESET
:
161 return GL_GUILTY_CONTEXT_RESET_ARB
;
162 case PIPE_INNOCENT_CONTEXT_RESET
:
163 return GL_INNOCENT_CONTEXT_RESET_ARB
;
164 case PIPE_UNKNOWN_CONTEXT_RESET
:
165 return GL_UNKNOWN_CONTEXT_RESET_ARB
;
173 void st_init_flush_functions(struct pipe_screen
*screen
,
174 struct dd_function_table
*functions
)
176 functions
->Flush
= st_glFlush
;
177 functions
->Finish
= st_glFinish
;
179 if (screen
->get_param(screen
, PIPE_CAP_DEVICE_RESET_STATUS_QUERY
))
180 functions
->GetGraphicsResetStatus
= st_get_graphics_reset_status
;
182 /* Windows opengl32.dll calls glFinish prior to every swapbuffers.
183 * This is unnecessary and degrades performance. Luckily we have some
184 * scope to work around this, as the externally-visible behaviour of
185 * Finish() is identical to Flush() in all cases - no differences in
186 * rendering or ReadPixels are visible if we opt not to wait here.
188 * Only set this up on Windows to avoid surprise elsewhere.
190 #ifdef PIPE_OS_WINDOWS
191 functions
->Finish
= st_glFlush
;