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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QOPENGLTEXTUREBLITTER_H
+#define QOPENGLTEXTUREBLITTER_H
+
+#include <QtOpenGL/qtopenglglobal.h>
+
+#include <QtGui/qopengl.h>
+#include <QtGui/QMatrix3x3>
+#include <QtGui/QMatrix4x4>
+
+QT_BEGIN_NAMESPACE
+
+class QOpenGLTextureBlitterPrivate;
+
+class Q_OPENGL_EXPORT QOpenGLTextureBlitter
+{
+public:
+ QOpenGLTextureBlitter();
+ ~QOpenGLTextureBlitter();
+
+ enum Origin {
+ OriginBottomLeft,
+ OriginTopLeft
+ };
+
+ bool create();
+ bool isCreated() const;
+ void destroy();
+
+ bool supportsExternalOESTarget() const;
+
+ void bind(GLenum target = GL_TEXTURE_2D);
+ void release();
+
+ void setRedBlueSwizzle(bool swizzle);
+ void setOpacity(float opacity);
+
+ void blit(GLuint texture, const QMatrix4x4 &targetTransform, Origin sourceOrigin);
+ void blit(GLuint texture, const QMatrix4x4 &targetTransform, const QMatrix3x3 &sourceTransform);
+
+ static QMatrix4x4 targetTransform(const QRectF &target, const QRect &viewport);
+ static QMatrix3x3 sourceTransform(const QRectF &subTexture, const QSize &textureSize, Origin origin);
+
+private:
+ Q_DISABLE_COPY(QOpenGLTextureBlitter)
+ Q_DECLARE_PRIVATE(QOpenGLTextureBlitter)
+ QScopedPointer<QOpenGLTextureBlitterPrivate> d_ptr;
+};
+
+QT_END_NAMESPACE
+
+#endif //QOPENGLTEXTUREBLITTER_H