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
|
/**
* Copyright 2014 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``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 JogAmp Community 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.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.opengl.util.stereo;
import com.jogamp.nativewindow.util.DimensionImmutable;
import com.jogamp.nativewindow.util.RectangleImmutable;
import com.jogamp.opengl.GL;
import com.jogamp.opengl.math.FovHVHalves;
/**
* Stereoscopic device rendering interface.
* <p>
* The following pseudo-code describes how to implement a renderer
* using a {@link StereoDeviceRenderer}.
* See {@link StereoClientRenderer} which implements the following:
* <ul>
* <li>device.{@link #beginFrame(GL)}</li>
* <li>For both eyes:<ul>
* <li>device.{@link #updateEyePose(int)}</li>
* <li>if device.{@link #ppAvailable()}: Set the render target, e.g. FBO</li>
* <li>Set the viewport using {@link Eye#getViewport()}</li>
* <li>{@link StereoGLEventListener#reshapeForEye(com.jogamp.opengl.GLAutoDrawable, int, int, int, int, EyeParameter, EyePose) upstream.reshapeEye(..)}</li>
* <li>{@link StereoGLEventListener#display(com.jogamp.opengl.GLAutoDrawable, int) upstream.display(..)}.</li>
* </ul></li>
* <li>Reset the viewport</li>
* <li>If device.{@link #ppAvailable()}:<ul>
* <li>device.{@link #ppBegin(GL)}</li>
* <li>Use render target, e.g. FBO's texture</li>
* <li>device.{@link #ppBothEyes(GL)} or device.{@link #ppOneEye(GL, int)} for both eyes</li>
* <li>device.{@link #ppEnd(GL)}</li>
* </ul></li>
* <li>device.{@link #endFrame(GL)}</li>
* </ul>
* </p>
* <a name="asymFOVRendering"><h5>Correct {@link FovHVHalves Asymmetric FOV} Rendering</h5></a>
* <p>
* The {@link StereoClientRenderer} shall render both images for each eye correctly <i>Off-axis</i>
* utilizing an asymmetric camera frustum, i.e. by using {@link StereoDevice StereoDevice}'s {@link StereoDevice#getDefaultFOV() default} {@link FovHVHalves}.<br>
*
* Some references:
* <ul>
* <li><a href="https://en.wikipedia.org/wiki/Binocular_vision">Wiki: Binocular Vision</a></li>
* <li><a href="http://paulbourke.net/stereographics/stereorender/">Paul Burke: Stereo Graphics - Stereo Renderer</a></li>
* <li><a href="https://en.wikipedia.org/wiki/Distortion_%28optics%29">Wiki: Distortion (Optics)</a></li>
* </ul>
* </p>
*/
public interface StereoDeviceRenderer {
/**
* Distortion Bit: Barrel distortion compensating lens pincushion distortion
*/
public static final int DISTORTION_BARREL = 1 << 0;
/**
* Distortion Bit: Chromatic distortion compensating lens chromatic aberration.
*/
public static final int DISTORTION_CHROMATIC = 1 << 1;
/**
* Distortion Bit: Vignette distortion compensating lens chromatic aberration.
*/
public static final int DISTORTION_VIGNETTE = 1 << 2;
/**
* Distortion Bit: Timewarp distortion technique to predict
* {@link EyePose} movement to reduce latency.
* <p>
* FIXME: Explanation needs refinement!
* </p>
*/
public static final int DISTORTION_TIMEWARP = 1 << 3;
/** Returns the {@link StereoDevice} of this {@link StereoDeviceRenderer} instance. */
public StereoDevice getDevice();
/**
* Interface describing one eye of the stereoscopic device,
* see {@link StereoDeviceRenderer#getEye(int)}.
*/
public static interface Eye {
/**
* Returns the viewport for this eye.
*/
public RectangleImmutable getViewport();
/**
* Returns the {@link EyeParameter} of this eye.
*/
public EyeParameter getEyeParameter();
/**
* Returns the last {@link EyePose} of this eye.
*/
public EyePose getLastEyePose();
}
/**
* Returns the {@link Eye} instance for the denoted <code>eyeNum</code>.
*/
public Eye getEye(final int eyeNum);
/**
* Updates the {@link Eye#getLastEyePose()}
* for the denoted <code>eyeNum</code>.
*/
public EyePose updateEyePose(final int eyeNum);
/**
* Returns used distortion compensation bits, e.g. {@link #DISTORTION_BARREL},
* in case the stereoscopic display requires such, i.e. in case lenses are utilized.
* <p>
* Distortion requires {@link #ppAvailable() post-processing}.
* </p>
*/
public int getDistortionBits();
/**
* Method returns <code>true</code> if using <i>side-by-side</i> (SBS)
* stereoscopic images, otherwise <code>false</code>.
* <p>
* SBS requires that both eye's images are presented
* <i>side-by-side</i> in the final framebuffer.
* </p>
* <p>
* Either the renderer presents the images <i>side-by-side</i> according to the {@link Eye#getViewport() eye's viewport},
* or {@link #ppAvailable() post-processing} is utilized to merge {@link #getTextureCount() textures}
* to a <i>side-by-side</i> configuration.
* </p>
*/
public boolean usesSideBySideStereo();
/**
* Returns the unified surface size of one eye's a single image in pixel units.
*/
public DimensionImmutable getSingleSurfaceSize();
/**
* Returns the total surface size required for the complete images in pixel units.
* <p>
* If {@link #usesSideBySideStereo()} the total size spans over both {@link #getSingleSurfaceSize()}, side-by-side.
* </p>
* <p>
* Otherwise the size is equal to {@link #getSingleSurfaceSize()}.
* </p>
*/
public DimensionImmutable getTotalSurfaceSize();
/**
* Returns the used texture-image count for post-processing, see {@link #ppAvailable()}.
* <p>
* In case the renderer does not support multiple textures for post-processing,
* or no post-processing at all, method returns zero despite the request
* from {@link StereoDevice#createRenderer(int, int, float[], com.jogamp.opengl.math.FovHVHalves[], float)}.
* </p>
*/
public int getTextureCount();
/** Returns the desired texture-image unit for post-processing, see {@link #ppAvailable()}. */
public int getTextureUnit();
/** Initialize OpenGL related resources */
public void init(final GL gl);
/** Release all OpenGL related resources */
public void dispose(final GL gl);
/** Notifying that a new frame is about to start. */
public void beginFrame(final GL gl);
/** Notifying that the frame has been rendered completely. */
public void endFrame(final GL gl);
/**
* Returns <code>true</code> if stereoscopic post-processing is required and available,
* otherwise <code>false</code>.
* <p>
* Stereoscopic post-processing is available if:
* <ul>
* <li>one of the <i>distortion</i> bits are set, see {@link #getDistortionBits()}</li>
* </ul>
* </p>
* <p>
* If stereoscopic post-processing is used
* the following post-processing methods must be called to before {@link #endFrame()}:
* <ul>
* <li>{@link #ppBegin(GL)}</li>
* <li>{@link #ppOneEye(GL, int)} for both eyes</li>
* <li>{@link #ppEnd(GL)}</li>
* </ul>
* </p>
*/
public boolean ppAvailable();
/**
* Begin stereoscopic post-processing, see {@link #ppAvailable()}.
* <p>
* {@link #updateEyePose(int)} for both eyes must be called upfront
* when rendering upstream {@link StereoGLEventListener}.
* </p>
*
* @param gl
*/
public void ppBegin(final GL gl);
/**
* Performs stereoscopic post-processing for one eye, see {@link #ppAvailable()}.
* @param gl
* @param eyeNum
*/
public void ppOneEye(final GL gl, final int eyeNum);
/**
* End stereoscopic post-processing, see {@link #ppAvailable()}.
* @param gl
*/
public void ppEnd(final GL gl);
}
|
