src/opengl/qpixmapdata_gl_p.h
changeset 0 1918ee327afb
child 3 41300fa6a67c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/opengl/qpixmapdata_gl_p.h	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,172 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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 QPIXMAPDATA_GL_P_H
+#define QPIXMAPDATA_GL_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qgl_p.h"
+#include "qgl.h"
+
+#include "private/qpixmapdata_p.h"
+#include "private/qglpaintdevice_p.h"
+
+QT_BEGIN_NAMESPACE
+
+class QPaintEngine;
+class QGLFramebufferObject;
+class QGLFramebufferObjectFormat;
+class QGLPixmapData;
+
+class QGLFramebufferObjectPool
+{
+public:
+    QGLFramebufferObject *acquire(const QSize &size, const QGLFramebufferObjectFormat &format);
+    void release(QGLFramebufferObject *fbo);
+
+private:
+    QList<QGLFramebufferObject *> m_fbos;
+};
+
+QGLFramebufferObjectPool* qgl_fbo_pool();
+
+
+class QGLPixmapGLPaintDevice : public QGLPaintDevice
+{
+public:
+    QPaintEngine* paintEngine() const;
+
+    void beginPaint();
+    void endPaint();
+    QGLContext* context() const;
+    QSize size() const;
+
+    void setPixmapData(QGLPixmapData*);
+private:
+    QGLPixmapData *data;
+};
+
+
+class QGLPixmapData : public QPixmapData
+{
+public:
+    QGLPixmapData(PixelType type);
+    ~QGLPixmapData();
+
+    QPixmapData *createCompatiblePixmapData() const;
+
+    // Re-implemented from QPixmapData:
+    void resize(int width, int height);
+    void fromImage(const QImage &image, Qt::ImageConversionFlags flags);
+    void copy(const QPixmapData *data, const QRect &rect);
+    bool scroll(int dx, int dy, const QRect &rect);
+    void fill(const QColor &color);
+    bool hasAlphaChannel() const;
+    QImage toImage() const;
+    QPaintEngine *paintEngine() const;
+    int metric(QPaintDevice::PaintDeviceMetric metric) const;
+
+    // For accessing as a target:
+    QGLPaintDevice *glDevice() const;
+
+    // For accessing as a source:
+    bool isValidContext(const QGLContext *ctx) const;
+    GLuint bind(bool copyBack = true) const;
+    QGLTexture *texture() const;
+
+private:
+    bool isValid() const;
+
+    void ensureCreated() const;
+
+    bool isUninitialized() const { return m_dirty && m_source.isNull(); }
+
+    bool needsFill() const { return m_hasFillColor; }
+    QColor fillColor() const { return m_fillColor; }
+
+
+
+    QGLPixmapData(const QGLPixmapData &other);
+    QGLPixmapData &operator=(const QGLPixmapData &other);
+
+    void copyBackFromRenderFbo(bool keepCurrentFboBound) const;
+    QSize size() const { return QSize(w, h); }
+
+    static bool useFramebufferObjects();
+
+    QImage fillImage(const QColor &color) const;
+
+    mutable QGLFramebufferObject *m_renderFbo;
+    mutable QPaintEngine *m_engine;
+    mutable QGLContext *m_ctx;
+    mutable QImage m_source;
+    mutable QGLTexture m_texture;
+
+    // the texture is not in sync with the source image
+    mutable bool m_dirty;
+
+    // fill has been called and no painting has been done, so the pixmap is
+    // represented by a single fill color
+    mutable QColor m_fillColor;
+    mutable bool m_hasFillColor;
+
+    mutable bool m_hasAlpha;
+
+    mutable QGLPixmapGLPaintDevice m_glDevice;
+
+    friend class QGLPixmapGLPaintDevice;
+};
+
+QT_END_NAMESPACE
+
+#endif // QPIXMAPDATA_GL_P_H
+
+