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>

1 files changed, 69 insertions, 0 deletions

diff --git a/tests/manual/qopengltextureblitter/qopengltextureblitwindow.h b/tests/manual/qopengltextureblitter/qopengltextureblitwindow.h
new file mode 100644
index 0000000000..855e173b1a
--- /dev/null
+++ b/tests/manual/qopengltextureblitter/qopengltextureblitwindow.h
@@ -0,0 +1,69 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite 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 QOPENGLTEXTUREBLITWINDOW_H
+#define QOPENGLTEXTUREBLITWINDOW_H
+
+#include <QtGui/QWindow>
+#include <QtGui/QOpenGLContext>
+#include <QtGui/private/qopengltextureblitter_p.h>
+
+class QOpenGLTextureBlitWindow : public QWindow
+{
+    Q_OBJECT
+public:
+    QOpenGLTextureBlitWindow();
+
+    void render();
+protected:
+    void exposeEvent(QExposeEvent *event);
+    void resizeEvent(QResizeEvent *event);
+
+private:
+    qreal dWidth() const { return width() * devicePixelRatio(); }
+    qreal dHeight() const { return height() * devicePixelRatio(); }
+
+    QScopedPointer<QOpenGLContext> m_context;
+    QOpenGLTextureBlitter m_blitter;
+    QImage m_image;
+};
+
+#endif