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diff --git a/src/opengl/qgraphicsshadereffect.cpp b/src/opengl/qgraphicsshadereffect.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the QtOpenGL 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 The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "qgraphicsshadereffect_p.h"
-
-#include "qglshaderprogram.h"
-#include "gl2paintengineex/qglcustomshaderstage_p.h"
-#define QGL_HAVE_CUSTOM_SHADERS 1
-#include <QtGui/qpainter.h>
-#include <QtWidgets/qgraphicsitem.h>
-#include <private/qgraphicseffect_p.h>
-
-QT_BEGIN_NAMESPACE
-
-/*#
- \class QGraphicsShaderEffect
- \inmodule QtOpenGL
- \brief The QGraphicsShaderEffect class is the base class for creating
- custom GLSL shader effects in a QGraphicsScene.
- \since 4.6
- \ingroup multimedia
- \ingroup graphicsview-api
-
- The specific effect is defined by a fragment of GLSL source code
- supplied to setPixelShaderFragment(). This source code must define a
- function with the signature
- \c{lowp vec4 customShader(lowp sampler2D imageTexture, highp vec2 textureCoords)}
- that returns the source pixel value
- to use in the paint engine's shader program. The shader fragment
- is linked with the regular shader code used by the GL2 paint engine
- to construct a complete QGLShaderProgram.
-
- The following example shader converts the incoming pixmap to
- grayscale and then applies a colorize operation using the
- \c effectColor value:
-
- \snippet code/src_opengl_qgraphicsshadereffect.cpp 0
-
- To use this shader code, it is necessary to define a subclass
- of QGraphicsShaderEffect as follows:
-
- \snippet code/src_opengl_qgraphicsshadereffect.cpp 1
-
- The setUniforms() function is called when the effect is about
- to be used for drawing to give the subclass the opportunity to
- set effect-specific uniform variables.
-
- QGraphicsShaderEffect is only supported when the GL2 paint engine
- is in use. When any other paint engine is in use (GL1, raster, etc),
- the drawItem() method will draw its item argument directly with
- no effect applied.
-
- \sa QGraphicsEffect
-*/
-
-static const char qglslDefaultImageFragmentShader[] = "\
- lowp vec4 customShader(lowp sampler2D imageTexture, highp vec2 textureCoords) { \
- return texture2D(imageTexture, textureCoords); \
- }\n";
-
-#ifdef QGL_HAVE_CUSTOM_SHADERS
-
-class QGLCustomShaderEffectStage : public QGLCustomShaderStage
-{
-public:
- QGLCustomShaderEffectStage
- (QGraphicsShaderEffect *e, const QByteArray& source)
- : QGLCustomShaderStage(),
- effect(e)
- {
- setSource(source);
- }
-
- void setUniforms(QGLShaderProgram *program) override;
-
- QGraphicsShaderEffect *effect;
-};
-
-void QGLCustomShaderEffectStage::setUniforms(QGLShaderProgram *program)
-{
- effect->setUniforms(program);
-}
-
-#endif
-
-class QGraphicsShaderEffectPrivate : public QGraphicsEffectPrivate
-{
- Q_DECLARE_PUBLIC(QGraphicsShaderEffect)
-public:
- QGraphicsShaderEffectPrivate()
- : pixelShaderFragment(qglslDefaultImageFragmentShader)
-#ifdef QGL_HAVE_CUSTOM_SHADERS
- , customShaderStage(0)
-#endif
- {
- }
-
- QByteArray pixelShaderFragment;
-#ifdef QGL_HAVE_CUSTOM_SHADERS
- QGLCustomShaderEffectStage *customShaderStage;
-#endif
-};
-
-/*#
- Constructs a shader effect and attaches it to \a parent.
-*/
-QGraphicsShaderEffect::QGraphicsShaderEffect(QObject *parent)
- : QGraphicsEffect(*new QGraphicsShaderEffectPrivate(), parent)
-{
-}
-
-/*#
- Destroys this shader effect.
-*/
-QGraphicsShaderEffect::~QGraphicsShaderEffect()
-{
-#ifdef QGL_HAVE_CUSTOM_SHADERS
- Q_D(QGraphicsShaderEffect);
- delete d->customShaderStage;
-#endif
-}
-
-/*#
- Returns the source code for the pixel shader fragment for
- this shader effect. The default is a shader that copies
- its incoming pixmap directly to the output with no effect
- applied.
-
- \sa setPixelShaderFragment()
-*/
-QByteArray QGraphicsShaderEffect::pixelShaderFragment() const
-{
- Q_D(const QGraphicsShaderEffect);
- return d->pixelShaderFragment;
-}
-
-/*#
- Sets the source code for the pixel shader fragment for
- this shader effect to \a code.
-
- The \a code must define a GLSL function with the signature
- \c{lowp vec4 customShader(lowp sampler2D imageTexture, highp vec2 textureCoords)}
- that returns the source pixel value to use in the paint engine's
- shader program. The following is the default pixel shader fragment,
- which draws a pixmap with no effect applied:
-
- \snippet code/src_opengl_qgraphicsshadereffect.cpp 2
-
- \sa pixelShaderFragment(), setUniforms()
-*/
-void QGraphicsShaderEffect::setPixelShaderFragment(const QByteArray& code)
-{
- Q_D(QGraphicsShaderEffect);
- if (d->pixelShaderFragment != code) {
- d->pixelShaderFragment = code;
-#ifdef QGL_HAVE_CUSTOM_SHADERS
- delete d->customShaderStage;
- d->customShaderStage = 0;
-#endif
- }
-}
-
-/*#
- \reimp
-*/
-void QGraphicsShaderEffect::draw(QPainter *painter)
-{
- Q_D(QGraphicsShaderEffect);
-
-#ifdef QGL_HAVE_CUSTOM_SHADERS
- // Set the custom shader on the paint engine. The setOnPainter()
- // call may fail if the paint engine is not GL2. In that case,
- // we fall through to drawing the pixmap normally.
- if (!d->customShaderStage) {
- d->customShaderStage = new QGLCustomShaderEffectStage
- (this, d->pixelShaderFragment);
- }
- bool usingShader = d->customShaderStage->setOnPainter(painter);
-
- QPoint offset;
- if (sourceIsPixmap()) {
- // No point in drawing in device coordinates (pixmap will be scaled anyways).
- const QPixmap pixmap = sourcePixmap(Qt::LogicalCoordinates, &offset);
- painter->drawPixmap(offset, pixmap);
- } else {
- // Draw pixmap in device coordinates to avoid pixmap scaling.
- const QPixmap pixmap = sourcePixmap(Qt::DeviceCoordinates, &offset);
- QTransform restoreTransform = painter->worldTransform();
- painter->setWorldTransform(QTransform());
- painter->drawPixmap(offset, pixmap);
- painter->setWorldTransform(restoreTransform);
- }
-
- // Remove the custom shader to return to normal painting operations.
- if (usingShader)
- d->customShaderStage->removeFromPainter(painter);
-#else
- drawSource(painter);
-#endif
-}
-
-/*#
- Sets the custom uniform variables on this shader effect to
- be dirty. The setUniforms() function will be called the next
- time the shader program corresponding to this effect is used.
-
- This function is typically called by subclasses when an
- effect-specific parameter is changed by the application.
-
- \sa setUniforms()
-*/
-void QGraphicsShaderEffect::setUniformsDirty()
-{
-#ifdef QGL_HAVE_CUSTOM_SHADERS
- Q_D(QGraphicsShaderEffect);
- if (d->customShaderStage)
- d->customShaderStage->setUniformsDirty();
-#endif
-}
-
-/*#
- Sets custom uniform variables on the current GL context when
- \a program is about to be used by the paint engine.
-
- This function should be overridden if the shader set with
- setPixelShaderFragment() has additional parameters beyond
- those that the paint engine normally sets itself.
-
- \sa setUniformsDirty()
-*/
-void QGraphicsShaderEffect::setUniforms(QGLShaderProgram *program)
-{
- Q_UNUSED(program);
-}
-
-QT_END_NAMESPACE