[2] | 1 | /****************************************************************************
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| 2 | **
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[651] | 3 | ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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[561] | 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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[2] | 6 | **
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| 7 | ** This file is part of the QtOpenGL module of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in
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| 14 | ** a written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Lesser General Public License Usage
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 18 | ** General Public License version 2.1 as published by the Free Software
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| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 20 | ** packaging of this file. Please review the following information to
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| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 23 | **
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[561] | 24 | ** In addition, as a special exception, Nokia gives you certain additional
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| 25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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[2] | 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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[561] | 36 | ** If you have questions regarding the use of this file, please contact
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| 37 | ** Nokia at [email protected].
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[2] | 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | #include "qglpixelbuffer.h"
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| 43 | #include "qglpixelbuffer_p.h"
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| 44 |
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| 45 | #ifndef QT_MAC_USE_COCOA
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| 46 | #include <AGL/agl.h>
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| 47 | #endif
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| 48 |
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| 49 | #include <qimage.h>
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| 50 | #include <private/qgl_p.h>
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| 51 | #include <qdebug.h>
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| 52 |
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| 53 | QT_BEGIN_NAMESPACE
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| 54 |
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| 55 | #ifndef GL_TEXTURE_RECTANGLE_EXT
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| 56 | #define GL_TEXTURE_RECTANGLE_EXT 0x84F5
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| 57 | #endif
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| 58 |
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| 59 | static int nearest_gl_texture_size(int v)
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| 60 | {
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| 61 | int n = 0, last = 0;
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| 62 | for (int s = 0; s < 32; ++s) {
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| 63 | if (((v>>s) & 1) == 1) {
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| 64 | ++n;
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| 65 | last = s;
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| 66 | }
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| 67 | }
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| 68 | if (n > 1)
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| 69 | return 1 << (last+1);
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| 70 | return 1 << last;
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| 71 | }
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| 72 |
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| 73 | bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
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| 74 | {
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| 75 | #ifdef QT_MAC_USE_COCOA
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| 76 | Q_Q(QGLPixelBuffer);
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| 77 | // create a dummy context
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| 78 | QGLContext context(f, q);
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| 79 | context.create(shareWidget ? shareWidget->context() : 0);
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| 80 |
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| 81 | if (context.isSharing())
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| 82 | share_ctx = shareWidget->context()->d_func()->cx;
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| 83 |
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| 84 | // steal the NSOpenGLContext and update the format
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| 85 | ctx = context.d_func()->cx;
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| 86 | context.d_func()->cx = 0;
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| 87 | // d->cx will be set to ctx later in
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| 88 | // QGLPixelBufferPrivate::common_init, so we need to retain it:
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| 89 | [static_cast<NSOpenGLContext *>(ctx) retain];
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| 90 |
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| 91 | format = context.format();
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| 92 |
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| 93 | GLenum target = GL_TEXTURE_2D;
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| 94 |
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[651] | 95 | if ((QGLExtensions::glExtensions() & QGLExtensions::TextureRectangle)
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[2] | 96 | && (size.width() != nearest_gl_texture_size(size.width())
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| 97 | || size.height() != nearest_gl_texture_size(size.height())))
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| 98 | {
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| 99 | target = GL_TEXTURE_RECTANGLE_EXT;
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| 100 | }
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| 101 |
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| 102 | pbuf = [[NSOpenGLPixelBuffer alloc] initWithTextureTarget:target
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| 103 | textureInternalFormat:GL_RGBA
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| 104 | textureMaxMipMapLevel:0
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| 105 | pixelsWide:size.width()
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| 106 | pixelsHigh:size.height()];
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| 107 | if (!pbuf) {
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| 108 | qWarning("QGLPixelBuffer: Cannot create a pbuffer");
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| 109 | return false;
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| 110 | }
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| 111 |
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| 112 | [static_cast<NSOpenGLContext *>(ctx) setPixelBuffer:static_cast<NSOpenGLPixelBuffer *>(pbuf)
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| 113 | cubeMapFace:0
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| 114 | mipMapLevel:0
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| 115 | currentVirtualScreen:0];
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| 116 | return true;
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| 117 | #else
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| 118 | GLint attribs[40], i=0;
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| 119 | attribs[i++] = AGL_RGBA;
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| 120 | attribs[i++] = AGL_BUFFER_SIZE;
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| 121 | attribs[i++] = 32;
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| 122 | attribs[i++] = AGL_LEVEL;
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| 123 | attribs[i++] = f.plane();
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| 124 | if (f.redBufferSize() != -1) {
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| 125 | attribs[i++] = AGL_RED_SIZE;
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| 126 | attribs[i++] = f.redBufferSize();
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