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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtOpenGL module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QTEXTUREGLYPHCACHE_GL_P_H
#define QTEXTUREGLYPHCACHE_GL_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of the QLibrary class. This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//
#include <private/qtextureglyphcache_p.h>
#include <private/qgl_p.h>
#include <qglshaderprogram.h>
QT_BEGIN_NAMESPACE
class QGL2PaintEngineExPrivate;
class Q_OPENGL_EXPORT QGLTextureGlyphCache : public QObject, public QImageTextureGlyphCache
{
Q_OBJECT
public:
QGLTextureGlyphCache(QGLContext *context, QFontEngineGlyphCache::Type type, const QTransform &matrix);
~QGLTextureGlyphCache();
virtual void createTextureData(int width, int height);
virtual void resizeTextureData(int width, int height);
virtual void fillTexture(const Coord &c, glyph_t glyph);
virtual int glyphPadding() const;
virtual int maxTextureWidth() const;
virtual int maxTextureHeight() const;
inline GLuint texture() const { return m_texture; }
inline int width() const { return m_width; }
inline int height() const { return m_height; }
inline void setPaintEnginePrivate(QGL2PaintEngineExPrivate *p) { pex = p; }
enum FilterMode {
Nearest,
Linear
};
FilterMode filterMode() const { return m_filterMode; }
void setFilterMode(FilterMode m) { m_filterMode = m; }
void setContext(QGLContext *context);
QGLContext *context() const { return ctx; }
public Q_SLOTS:
void contextDestroyed(const QGLContext *context) {
if (context == ctx) {
const QGLContext *nextCtx = qt_gl_transfer_context(ctx);
if (!nextCtx) {
// the context may not be current, so we cannot directly
// destroy the fbo and texture here, but since the context
// is about to be destroyed, the GL server will do the
// clean up for us anyway. We reset everything, so that the
// glyph cache object can be reused later by setting a new
// context on it.
m_fbo = 0;
m_texture = 0;
ctx = 0;
m_width = 0;
m_height = 0;
m_w = 0;
m_h = 0;
m_cx = 0;
m_cy = 0;
m_currentRowHeight = 0;
coords.clear();
} else {
// since the context holding the texture is shared, and
// about to be destroyed, we have to transfer ownership
// of the texture to one of the share contexts
ctx = const_cast<QGLContext *>(nextCtx);
}
}
}
void clear();
private:
QGLContext *ctx;
QGL2PaintEngineExPrivate *pex;
GLuint m_texture;
GLuint m_fbo;
int m_width;
int m_height;
QGLShaderProgram *m_program;
FilterMode m_filterMode;
};
QT_END_NAMESPACE
#endif
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