include/QtOpenGL/qopengltextureblitter.h

0001 // Copyright (C) 2016 The Qt Company Ltd.
0002 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
0003
0004 #ifndef QOPENGLTEXTUREBLITTER_H
0005 #define QOPENGLTEXTUREBLITTER_H
0006
0007 #include <QtOpenGL/qtopenglglobal.h>
0008
0009 #include <QtGui/qopengl.h>
0010 #include <QtGui/QMatrix3x3>
0011 #include <QtGui/QMatrix4x4>
0012
0013 QT_BEGIN_NAMESPACE
0014
0015 class QOpenGLTextureBlitterPrivate;
0016
0017 class Q_OPENGL_EXPORT QOpenGLTextureBlitter
0018 {
0019 public:
0020     QOpenGLTextureBlitter();
0021     ~QOpenGLTextureBlitter();
0022
0023     enum Origin {
0024         OriginBottomLeft,
0025         OriginTopLeft
0026     };
0027
0028     bool create();
0029     bool isCreated() const;
0030     void destroy();
0031
0032     bool supportsExternalOESTarget() const;
0033     bool supportsRectangleTarget() const;
0034
0035     void bind(GLenum target = GL_TEXTURE_2D);
0036     void release();
0037
0038     void setRedBlueSwizzle(bool swizzle);
0039     void setOpacity(float opacity);
0040
0041     void blit(GLuint texture, const QMatrix4x4 &targetTransform, Origin sourceOrigin);
0042     void blit(GLuint texture, const QMatrix4x4 &targetTransform, const QMatrix3x3 &sourceTransform);
0043
0044     static QMatrix4x4 targetTransform(const QRectF &target, const QRect &viewport);
0045     static QMatrix3x3 sourceTransform(const QRectF &subTexture, const QSize &textureSize, Origin origin);
0046
0047 private:
0048     Q_DISABLE_COPY(QOpenGLTextureBlitter)
0049     Q_DECLARE_PRIVATE(QOpenGLTextureBlitter)
0050     QScopedPointer<QOpenGLTextureBlitterPrivate> d_ptr;
0051 };
0052
0053 QT_END_NAMESPACE
0054
0055 #endif //QOPENGLTEXTUREBLITTER_H