1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file implements the OpenGL versions of the render surface resources,
// as well as the related GAPIGL function implementations.
#include "command_buffer/service/cross/gl/gapi_gl.h"
#include "command_buffer/service/cross/gl/render_surface_gl.h"
namespace o3d {
namespace command_buffer {
RenderSurfaceGL::RenderSurfaceGL(int width,
int height,
int mip_level,
int side,
TextureGL *texture)
: width_(width), height_(height), mip_level_(mip_level), texture_(texture) {
}
RenderSurfaceGL* RenderSurfaceGL::Create(int width,
int height,
int mip_level,
int side,
TextureGL *texture) {
DCHECK_GT(width, 0);
DCHECK_GT(height, 0);
DCHECK_GE(mip_level, 0);
DCHECK(texture);
RenderSurfaceGL* render_surface =
new RenderSurfaceGL(width, height, mip_level, side, texture);
return render_surface;
}
RenderDepthStencilSurfaceGL::RenderDepthStencilSurfaceGL(
int width,
int height)
: width_(width), height_(height) {
DCHECK_GT(width, 0);
DCHECK_GT(height, 0);
// If packed depth stencil is supported, create only one buffer for both
// depth and stencil.
if (GLEW_EXT_packed_depth_stencil) {
glGenRenderbuffersEXT(1, render_buffers_);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, render_buffers_[0]);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT,
GL_DEPTH24_STENCIL8_EXT,
width,
height);
CHECK_GL_ERROR();
render_buffers_[1] = render_buffers_[0];
} else {
glGenRenderbuffersEXT(2, render_buffers_);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, render_buffers_[0]);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT,
GL_DEPTH_COMPONENT24,
width,
height);
CHECK_GL_ERROR();
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, render_buffers_[1]);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT,
GL_STENCIL_INDEX8_EXT,
width,
height);
CHECK_GL_ERROR();
}
}
RenderDepthStencilSurfaceGL* RenderDepthStencilSurfaceGL::Create(
int width,
int height) {
DCHECK_GT(width, 0);
DCHECK_GT(height, 0);
return new RenderDepthStencilSurfaceGL(height, width);
}
// Copies the data from a texture resource.
BufferSyncInterface::ParseError GAPIGL::CreateRenderSurface(
ResourceId id,
unsigned int width,
unsigned int height,
unsigned int mip_level,
unsigned int side,
ResourceId texture_id) {
if (id == current_surface_id_) {
// This will delete the current surface which would be bad.
return BufferSyncInterface::kParseInvalidArguments;
}
TextureGL *texture = textures_.Get(texture_id);
if (!texture->render_surfaces_enabled()) {
return BufferSyncInterface::kParseInvalidArguments;
} else {
RenderSurfaceGL* render_surface = RenderSurfaceGL::Create(width,
height,
mip_level,
side,
texture);
if (render_surface == NULL) {
return BufferSyncInterface::kParseInvalidArguments;
}
render_surfaces_.Assign(id, render_surface);
}
return BufferSyncInterface::kParseNoError;
}
BufferSyncInterface::ParseError GAPIGL::DestroyRenderSurface(ResourceId id) {
if (id == current_surface_id_) {
return BufferSyncInterface::kParseInvalidArguments;
}
return render_surfaces_.Destroy(id) ?
BufferSyncInterface::kParseNoError :
BufferSyncInterface::kParseInvalidArguments;
}
BufferSyncInterface::ParseError GAPIGL::CreateDepthSurface(
ResourceId id,
unsigned int width,
unsigned int height) {
if (id == current_depth_surface_id_) {
// This will delete the current surface which would be bad.
return BufferSyncInterface::kParseInvalidArguments;
}
RenderDepthStencilSurfaceGL* depth_surface =
RenderDepthStencilSurfaceGL::Create(width, height);
if (depth_surface == NULL) {
return BufferSyncInterface::kParseInvalidArguments;
}
depth_surfaces_.Assign(id, depth_surface);
return BufferSyncInterface::kParseNoError;
}
BufferSyncInterface::ParseError GAPIGL::DestroyDepthSurface(ResourceId id) {
if (id == current_depth_surface_id_) {
return BufferSyncInterface::kParseInvalidArguments;
}
return depth_surfaces_.Destroy(id) ?
BufferSyncInterface::kParseNoError :
BufferSyncInterface::kParseInvalidArguments;
}
void ResetBoundAttachments() {
#ifdef _DEBUG
GLint bound_framebuffer;
::glGetIntegerv(GL_FRAMEBUFFER_BINDING_EXT, &bound_framebuffer);
DCHECK(bound_framebuffer != 0);
#endif
// Reset the bound attachments to the current framebuffer object.
::glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
GL_RENDERBUFFER_EXT,
0);
::glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT,
0);
::glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT,
0);
CHECK_GL_ERROR();
}
bool BindDepthStencilBuffer(const RenderDepthStencilSurfaceGL* gl_surface) {
// Bind both the depth and stencil attachments.
::glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT,
gl_surface->depth_buffer());
::glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT,
gl_surface->stencil_buffer());
// Check for errors.
GLenum framebuffer_status = ::glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (GL_FRAMEBUFFER_COMPLETE_EXT != framebuffer_status) {
return false;
}
CHECK_GL_ERROR();
return true;
}
BufferSyncInterface::ParseError GAPIGL::SetRenderSurface(
ResourceId render_surface_id,
ResourceId depth_stencil_id) {
if (render_surfaces_.Get(render_surface_id) == NULL &&
depth_surfaces_.Get(depth_stencil_id) == NULL) {
return BufferSyncInterface::kParseInvalidArguments;
}
::glBindFramebufferEXT(GL_FRAMEBUFFER, render_surface_framebuffer_);
ResetBoundAttachments();
RenderSurfaceGL* render_surface = render_surfaces_.Get(render_surface_id);
RenderDepthStencilSurfaceGL* depth_surface =
depth_surfaces_.Get(render_surface_id);
if (!render_surface->texture()->
InstallFrameBufferObjects(render_surface) ||
!BindDepthStencilBuffer(depth_surface)) {
return BufferSyncInterface::kParseInvalidArguments;
}
// RenderSurface rendering is performed with an inverted Y, so the front
// face winding must be changed to clock-wise. See comments for
// UpdateHelperConstant.
glFrontFace(GL_CW);
current_surface_id_ = render_surface_id;
current_depth_surface_id_ = depth_stencil_id;
return BufferSyncInterface::kParseNoError;
}
void GAPIGL::SetBackSurfaces() {
// Bind the default context, and restore the default front-face winding.
::glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
glFrontFace(GL_CCW);
}
} // namespace command_buffer
} // namespace o3d
|