1 /**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
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 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.
25 *
26 **************************************************************************/
27
28 /*
29 * Authors:
30 * Keith Whitwell <keithw@vmware.com>
31 * Brian Paul
32 */
33
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"
47
48
49 /** Check if we have a front color buffer and if it's been drawn to. */
50 static inline GLboolean
is_front_buffer_dirty(struct st_context * st)51 is_front_buffer_dirty(struct st_context *st)
52 {
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;
57 }
58
59
60 /**
61 * Tell the screen to display the front color buffer on-screen.
62 */
63 static void
display_front_buffer(struct st_context * st)64 display_front_buffer(struct st_context *st)
65 {
66 struct gl_framebuffer *fb = st->ctx->DrawBuffer;
67 struct st_renderbuffer *strb
68 = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
69
70 if (strb) {
71 /* Hook for copying "fake" frontbuffer if necessary:
72 */
73 st_manager_flush_frontbuffer(st);
74 }
75 }
76
77
st_flush(struct st_context * st,struct pipe_fence_handle ** fence,unsigned flags)78 void st_flush(struct st_context *st,
79 struct pipe_fence_handle **fence,
80 unsigned flags)
81 {
82 FLUSH_VERTICES(st->ctx, 0);
83 FLUSH_CURRENT(st->ctx, 0);
84
85 st_flush_bitmap_cache(st);
86
87 st->pipe->flush(st->pipe, fence, flags);
88 }
89
90
91 /**
92 * Flush, and wait for completion.
93 */
st_finish(struct st_context * st)94 void st_finish( struct st_context *st )
95 {
96 struct pipe_fence_handle *fence = NULL;
97
98 st_flush(st, &fence, 0);
99
100 if(fence) {
101 st->pipe->screen->fence_finish(st->pipe->screen, NULL, fence,
102 PIPE_TIMEOUT_INFINITE);
103 st->pipe->screen->fence_reference(st->pipe->screen, &fence, NULL);
104 }
105 }
106
107
108
109 /**
110 * Called via ctx->Driver.Flush()
111 */
st_glFlush(struct gl_context * ctx)112 static void st_glFlush(struct gl_context *ctx)
113 {
114 struct st_context *st = st_context(ctx);
115
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.
120 */
121 st_flush(st, NULL, 0);
122
123 if (is_front_buffer_dirty(st)) {
124 display_front_buffer(st);
125 }
126 }
127
128
129 /**
130 * Called via ctx->Driver.Finish()
131 */
st_glFinish(struct gl_context * ctx)132 static void st_glFinish(struct gl_context *ctx)
133 {
134 struct st_context *st = st_context(ctx);
135
136 st_finish(st);
137
138 if (is_front_buffer_dirty(st)) {
139 display_front_buffer(st);
140 }
141 }
142
143
144 static GLenum
gl_reset_status_from_pipe_reset_status(enum pipe_reset_status status)145 gl_reset_status_from_pipe_reset_status(enum pipe_reset_status status)
146 {
147 switch (status) {
148 case PIPE_NO_RESET:
149 return GL_NO_ERROR;
150 case PIPE_GUILTY_CONTEXT_RESET:
151 return GL_GUILTY_CONTEXT_RESET_ARB;
152 case PIPE_INNOCENT_CONTEXT_RESET:
153 return GL_INNOCENT_CONTEXT_RESET_ARB;
154 case PIPE_UNKNOWN_CONTEXT_RESET:
155 return GL_UNKNOWN_CONTEXT_RESET_ARB;
156 default:
157 assert(0);
158 return GL_NO_ERROR;
159 }
160 }
161
162
163 /**
164 * Query information about GPU resets observed by this context
165 *
166 * Called via \c dd_function_table::GetGraphicsResetStatus.
167 */
168 static GLenum
st_get_graphics_reset_status(struct gl_context * ctx)169 st_get_graphics_reset_status(struct gl_context *ctx)
170 {
171 struct st_context *st = st_context(ctx);
172 enum pipe_reset_status status;
173
174 if (st->reset_status != PIPE_NO_RESET) {
175 status = st->reset_status;
176 st->reset_status = PIPE_NO_RESET;
177 } else {
178 status = st->pipe->get_device_reset_status(st->pipe);
179 }
180
181 return gl_reset_status_from_pipe_reset_status(status);
182 }
183
184
185 static void
st_device_reset_callback(void * data,enum pipe_reset_status status)186 st_device_reset_callback(void *data, enum pipe_reset_status status)
187 {
188 struct st_context *st = data;
189
190 assert(status != PIPE_NO_RESET);
191
192 st->reset_status = status;
193 _mesa_set_context_lost_dispatch(st->ctx);
194 }
195
196
197 void
st_install_device_reset_callback(struct st_context * st)198 st_install_device_reset_callback(struct st_context *st)
199 {
200 if (st->pipe->set_device_reset_callback) {
201 struct pipe_device_reset_callback cb;
202 cb.reset = st_device_reset_callback;
203 cb.data = st;
204 st->pipe->set_device_reset_callback(st->pipe, &cb);
205 }
206 }
207
208
st_init_flush_functions(struct pipe_screen * screen,struct dd_function_table * functions)209 void st_init_flush_functions(struct pipe_screen *screen,
210 struct dd_function_table *functions)
211 {
212 functions->Flush = st_glFlush;
213 functions->Finish = st_glFinish;
214
215 if (screen->get_param(screen, PIPE_CAP_DEVICE_RESET_STATUS_QUERY))
216 functions->GetGraphicsResetStatus = st_get_graphics_reset_status;
217
218 /* Windows opengl32.dll calls glFinish prior to every swapbuffers.
219 * This is unnecessary and degrades performance. Luckily we have some
220 * scope to work around this, as the externally-visible behaviour of
221 * Finish() is identical to Flush() in all cases - no differences in
222 * rendering or ReadPixels are visible if we opt not to wait here.
223 *
224 * Only set this up on Windows to avoid surprise elsewhere.
225 */
226 #ifdef PIPE_OS_WINDOWS
227 functions->Finish = st_glFlush;
228 #endif
229 }
230