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1 | /**************************************************************************** |
---|---|
2 | ** |
3 | ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). |
4 | ** Contact: http://www.qt-project.org/legal |
5 | ** |
6 | ** This file is part of the QtOpenGL module of the Qt Toolkit. |
7 | ** |
8 | ** $QT_BEGIN_LICENSE:LGPL$ |
9 | ** Commercial License Usage |
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11 | ** accordance with the commercial license agreement provided with the |
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14 | ** conditions see http://qt.digia.com/licensing. For further information |
15 | ** use the contact form at http://qt.digia.com/contact-us. |
16 | ** |
17 | ** GNU Lesser General Public License Usage |
18 | ** Alternatively, this file may be used under the terms of the GNU Lesser |
19 | ** General Public License version 2.1 as published by the Free Software |
20 | ** Foundation and appearing in the file LICENSE.LGPL included in the |
21 | ** packaging of this file. Please review the following information to |
22 | ** ensure the GNU Lesser General Public License version 2.1 requirements |
23 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
24 | ** |
25 | ** In addition, as a special exception, Digia gives you certain additional |
26 | ** rights. These rights are described in the Digia Qt LGPL Exception |
27 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
28 | ** |
29 | ** GNU General Public License Usage |
30 | ** Alternatively, this file may be used under the terms of the GNU |
31 | ** General Public License version 3.0 as published by the Free Software |
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33 | ** packaging of this file. Please review the following information to |
34 | ** ensure the GNU General Public License version 3.0 requirements will be |
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36 | ** |
37 | ** |
38 | ** $QT_END_LICENSE$ |
39 | ** |
40 | ****************************************************************************/ |
41 | |
42 | #include <qdebug.h> |
43 | #include "qglpixelbuffer.h" |
44 | #include "qglpixelbuffer_p.h" |
45 | #include "qgl_egl_p.h" |
46 | |
47 | #include <qimage.h> |
48 | #include <private/qgl_p.h> |
49 | |
50 | QT_BEGIN_NAMESPACE |
51 | |
52 | #ifdef EGL_BIND_TO_TEXTURE_RGBA |
53 | #define QGL_RENDER_TEXTURE 1 |
54 | #else |
55 | #define QGL_RENDER_TEXTURE 0 |
56 | #endif |
57 | |
58 | bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget) |
59 | { |
60 | // Create the EGL context. |
61 | ctx = new QEglContext(); |
62 | ctx->setApi(QEgl::OpenGL); |
63 | |
64 | // Find the shared context. |
65 | QEglContext *shareContext = 0; |
66 | if (shareWidget && shareWidget->d_func()->glcx) |
67 | shareContext = shareWidget->d_func()->glcx->d_func()->eglContext; |
68 | |
69 | // Choose an appropriate configuration. We use the best format |
70 | // we can find, even if it is greater than the requested format. |
71 | // We try for a pbuffer that is capable of texture rendering if possible. |
72 | textureFormat = EGL_NONE; |
73 | if (shareContext) { |
74 | // Use the same configuration as the widget we are sharing with. |
75 | ctx->setConfig(shareContext->config()); |
76 | #if QGL_RENDER_TEXTURE |
77 | if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGBA) == EGL_TRUE) |
78 | textureFormat = EGL_TEXTURE_RGBA; |
79 | else if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGB) == EGL_TRUE) |
80 | textureFormat = EGL_TEXTURE_RGB; |
81 | #endif |
82 | } else { |
83 | QEglProperties configProps; |
84 | qt_eglproperties_set_glformat(configProps, f); |
85 | configProps.setDeviceType(QInternal::Pbuffer); |
86 | configProps.setRenderableType(ctx->api()); |
87 | bool ok = false; |
88 | #if QGL_RENDER_TEXTURE |
89 | textureFormat = EGL_TEXTURE_RGBA; |
90 | configProps.setValue(EGL_BIND_TO_TEXTURE_RGBA, EGL_TRUE); |
91 | ok = ctx->chooseConfig(configProps, QEgl::BestPixelFormat); |
92 | if (!ok) { |
93 | // Try again with RGB texture rendering. |
94 | textureFormat = EGL_TEXTURE_RGB; |
95 | configProps.removeValue(EGL_BIND_TO_TEXTURE_RGBA); |
96 | configProps.setValue(EGL_BIND_TO_TEXTURE_RGB, EGL_TRUE); |
97 | ok = ctx->chooseConfig(configProps, QEgl::BestPixelFormat); |
98 | if (!ok) { |
99 | // One last try for a pbuffer with no texture rendering. |
100 | configProps.removeValue(EGL_BIND_TO_TEXTURE_RGB); |
101 | textureFormat = EGL_NONE; |
102 | } |
103 | } |
104 | #endif |
105 | if (!ok) { |
106 | if (!ctx->chooseConfig(configProps, QEgl::BestPixelFormat)) { |
107 | delete ctx; |
108 | ctx = 0; |
109 | return false; |
110 | } |
111 | } |
112 | } |
113 | |
114 | // Retrieve the actual format properties. |
115 | qt_glformat_from_eglconfig(format, ctx->config()); |
116 | |
117 | // Create the attributes needed for the pbuffer. |
118 | QEglProperties attribs; |
119 | attribs.setValue(EGL_WIDTH, size.width()); |
120 | attribs.setValue(EGL_HEIGHT, size.height()); |
121 | #if QGL_RENDER_TEXTURE |
122 | if (textureFormat != EGL_NONE) { |
123 | attribs.setValue(EGL_TEXTURE_FORMAT, textureFormat); |
124 | attribs.setValue(EGL_TEXTURE_TARGET, EGL_TEXTURE_2D); |
125 | } |
126 | #endif |
127 | |
128 | // Create the pbuffer surface. |
129 | pbuf = eglCreatePbufferSurface(ctx->display(), ctx->config(), attribs.properties()); |
130 | #if QGL_RENDER_TEXTURE |
131 | if (pbuf == EGL_NO_SURFACE && textureFormat != EGL_NONE) { |
132 | // Try again with texture rendering disabled. |
133 | textureFormat = EGL_NONE; |
134 | attribs.removeValue(EGL_TEXTURE_FORMAT); |
135 | attribs.removeValue(EGL_TEXTURE_TARGET); |
136 | pbuf = eglCreatePbufferSurface(ctx->display(), ctx->config(), attribs.properties()); |
137 | } |
138 | #endif |
139 | if (pbuf == EGL_NO_SURFACE) { |
140 | qWarning() << "QGLPixelBufferPrivate::init(): Unable to create EGL pbuffer surface:"<< QEgl::errorString(); |
141 | return false; |
142 | } |
143 | |
144 | // Create a new context for the configuration. |
145 | if (!ctx->createContext(shareContext)) { |
146 | delete ctx; |
147 | ctx = 0; |
148 | return false; |
149 | } |
150 | |
151 | return true; |
152 | } |
153 | |
154 | bool QGLPixelBufferPrivate::cleanup() |
155 | { |
156 | // No need to destroy "pbuf" here - it is done in QGLContext::reset(). |
157 | return true; |
158 | } |
159 | |
160 | bool QGLPixelBuffer::bindToDynamicTexture(GLuint texture_id) |
161 | { |
162 | #if QGL_RENDER_TEXTURE |
163 | Q_D(QGLPixelBuffer); |
164 | if (d->invalid || d->textureFormat == EGL_NONE || !d->ctx) |
165 | return false; |
166 | glBindTexture(GL_TEXTURE_2D, texture_id); |
167 | return eglBindTexImage(d->ctx->display(), d->pbuf, EGL_BACK_BUFFER); |
168 | #else |
169 | Q_UNUSED(texture_id); |
170 | return false; |
171 | #endif |
172 | } |
173 | |
174 | void QGLPixelBuffer::releaseFromDynamicTexture() |
175 | { |
176 | #if QGL_RENDER_TEXTURE |
177 | Q_D(QGLPixelBuffer); |
178 | if (d->invalid || d->textureFormat == EGL_NONE || !d->ctx) |
179 | return; |
180 | eglReleaseTexImage(d->ctx->display(), d->pbuf, EGL_BACK_BUFFER); |
181 | #endif |
182 | } |
183 | |
184 | |
185 | GLuint QGLPixelBuffer::generateDynamicTexture() const |
186 | { |
187 | #if QGL_RENDER_TEXTURE |
188 | Q_D(const QGLPixelBuffer); |
189 | GLuint texture; |
190 | glGenTextures(1, &texture); |
191 | glBindTexture(GL_TEXTURE_2D, texture); |
192 | if (d->textureFormat == EGL_TEXTURE_RGB) |
193 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, d->req_size.width(), d->req_size.height(), 0, GL_RGB, GL_UNSIGNED_BYTE, 0); |
194 | else |
195 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, d->req_size.width(), d->req_size.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); |
196 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
197 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
198 | return texture; |
199 | #else |
200 | return 0; |
201 | #endif |
202 | } |
203 | |
204 | bool QGLPixelBuffer::hasOpenGLPbuffers() |
205 | { |
206 | // See if we have at least 1 configuration that matches the default format. |
207 | EGLDisplay dpy = QEgl::display(); |
208 | if (dpy == EGL_NO_DISPLAY) |
209 | return false; |
210 | QEglProperties configProps; |
211 | qt_eglproperties_set_glformat(configProps, QGLFormat::defaultFormat()); |
212 | configProps.setDeviceType(QInternal::Pbuffer); |
213 | configProps.setRenderableType(QEgl::OpenGL); |
214 | do { |
215 | EGLConfig cfg = 0; |
216 | EGLint matching = 0; |
217 | if (eglChooseConfig(dpy, configProps.properties(), |
218 | &cfg, 1, &matching) && matching > 0) |
219 | return true; |
220 | } while (configProps.reduceConfiguration()); |
221 | return false; |
222 | } |
223 | |
224 | QT_END_NAMESPACE |
225 |
Warning: That file was not part of the compilation database. It may have many parsing errors.