diff options
author | Jorgen Lind <jorgen.lind@gmail.com> | 2014-02-02 22:29:38 +0100 |
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committer | The Qt Project <gerrit-noreply@qt-project.org> | 2014-02-10 12:49:06 +0100 |
commit | a80253ae4c2ea52a8ffb77e62648374b6fc650a8 (patch) | |
tree | 0632cbb75a05990ec72cd5622b4fbd845bd2fe68 /src/gui/opengl/qopengltextureblitter_p.h | |
parent | a093204f07f276bc8e7b4fedf4af0e1369f55734 (diff) |
QOpenGLTextureBlitter
private api, but useful for 2d gui code that suddenly finds itself
needing to get a set of textures onto some fbo
I didn't want to include ARB_copy_image since it looks like its from
texture/renderbuffer -> texture/renderbuffer while this class implies
texture -> write fbo. We could wrap ARB_copy_image in QOpenGLTexture or
some other class or we can add it later.
I have not added any QOpenGLTexture functions since this class opperates
on the GLuint identifier. We can add overloads later.
Change-Id: I3e565b33466c1c183a249a33c3e82c6786debd55
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>
Diffstat (limited to 'src/gui/opengl/qopengltextureblitter_p.h')
-rw-r--r-- | src/gui/opengl/qopengltextureblitter_p.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/gui/opengl/qopengltextureblitter_p.h b/src/gui/opengl/qopengltextureblitter_p.h new file mode 100644 index 0000000000..5164d8630e --- /dev/null +++ b/src/gui/opengl/qopengltextureblitter_p.h @@ -0,0 +1,86 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtGui 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QOPENGLTEXTUREBLITTER_P_H +#define QOPENGLTEXTUREBLITTER_P_H + +#include <QtGui/qopengl.h> +#include <QtGui/QMatrix3x3> + +QT_BEGIN_NAMESPACE + +class QOpenGLTextureBlitterPrivate; + + +class Q_GUI_EXPORT QOpenGLTextureBlitter +{ +public: + QOpenGLTextureBlitter(); + ~QOpenGLTextureBlitter(); + + enum Origin { + OriginBottomLeft, + OriginTopLeft + }; + + bool create(); + void destroy(); + + void bind(); + void release(); + + void setSwizzleRB(bool swizzle); + + 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, Origin origin); + 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_P_H |