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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtOpenGL module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QGLFRAMEBUFFEROBJECT_P_H
#define QGLFRAMEBUFFEROBJECT_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 <qglframebufferobject.h>
#include <private/qglpaintdevice_p.h>
#include <private/qgl_p.h>
#include <private/qopenglextensions_p.h>
QT_BEGIN_NAMESPACE
class QGLFramebufferObjectFormatPrivate
{
public:
QGLFramebufferObjectFormatPrivate()
: ref(1),
samples(0),
attachment(QGLFramebufferObject::NoAttachment),
target(GL_TEXTURE_2D),
mipmap(false)
{
#ifndef QT_OPENGL_ES_2
QOpenGLContext *ctx = QOpenGLContext::currentContext();
const bool isES = ctx ? ctx->isOpenGLES() : QOpenGLContext::openGLModuleType() != QOpenGLContext::LibGL;
internal_format = isES ? GL_RGBA : GL_RGBA8;
#else
internal_format = GL_RGBA;
#endif
}
QGLFramebufferObjectFormatPrivate
(const QGLFramebufferObjectFormatPrivate *other)
: ref(1),
samples(other->samples),
attachment(other->attachment),
target(other->target),
internal_format(other->internal_format),
mipmap(other->mipmap)
{
}
bool equals(const QGLFramebufferObjectFormatPrivate *other)
{
return samples == other->samples &&
attachment == other->attachment &&
target == other->target &&
internal_format == other->internal_format &&
mipmap == other->mipmap;
}
QAtomicInt ref;
int samples;
QGLFramebufferObject::Attachment attachment;
GLenum target;
GLenum internal_format;
uint mipmap : 1;
};
class QGLFBOGLPaintDevice : public QGLPaintDevice
{
public:
virtual QPaintEngine* paintEngine() const Q_DECL_OVERRIDE {return fbo->paintEngine();}
virtual QSize size() const Q_DECL_OVERRIDE {return fbo->size();}
virtual QGLContext* context() const Q_DECL_OVERRIDE;
virtual QGLFormat format() const Q_DECL_OVERRIDE {return fboFormat;}
virtual bool alphaRequested() const Q_DECL_OVERRIDE { return reqAlpha; }
void setFBO(QGLFramebufferObject* f,
QGLFramebufferObject::Attachment attachment);
private:
QGLFramebufferObject* fbo;
QGLFormat fboFormat;
bool reqAlpha;
};
class QGLFramebufferObjectPrivate
{
public:
QGLFramebufferObjectPrivate() : fbo_guard(0), texture_guard(0), depth_buffer_guard(0)
, stencil_buffer_guard(0), color_buffer_guard(0)
, valid(false), engine(0) {}
~QGLFramebufferObjectPrivate() {}
void init(QGLFramebufferObject *q, const QSize& sz,
QGLFramebufferObject::Attachment attachment,
GLenum internal_format, GLenum texture_target,
GLint samples = 0, bool mipmap = false);
bool checkFramebufferStatus() const;
QGLSharedResourceGuardBase *fbo_guard;
QGLSharedResourceGuardBase *texture_guard;
QGLSharedResourceGuardBase *depth_buffer_guard;
QGLSharedResourceGuardBase *stencil_buffer_guard;
QGLSharedResourceGuardBase *color_buffer_guard;
GLenum target;
QSize size;
QGLFramebufferObjectFormat format;
uint valid : 1;
QGLFramebufferObject::Attachment fbo_attachment;
mutable QPaintEngine *engine;
QGLFBOGLPaintDevice glDevice;
QOpenGLExtensions funcs;
inline GLuint fbo() const { return fbo_guard ? fbo_guard->id() : 0; }
};
QT_END_NAMESPACE
#endif // QGLFRAMEBUFFEROBJECT_P_H
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