diff options
Diffstat (limited to 'src/imports/threed/shaderprogram.cpp')
| -rw-r--r-- | src/imports/threed/shaderprogram.cpp | 979 |
1 files changed, 0 insertions, 979 deletions
diff --git a/src/imports/threed/shaderprogram.cpp b/src/imports/threed/shaderprogram.cpp deleted file mode 100644 index 7b775b5b..00000000 --- a/src/imports/threed/shaderprogram.cpp +++ /dev/null @@ -1,979 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation ([email protected]) -** -** This file is part of the QtQuick3D module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** 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. -** -** 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. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "shaderprogram.h" -#include "shaderprogram_p.h" -#include "qglabstracteffect.h" -#include <QtOpenGL/qglshaderprogram.h> -#include <QWeakPointer> - -#include <QDeclarativeEngine> -#include <QDeclarativeContext> -#include <QFile> - -#include "qglscenenode.h" -/*! - \qmlclass ShaderProgram ShaderProgram - \brief The ShaderProgram item is derivative class of the more general Effect class in QML/3d. - Whereas the Effect class provides support for standard effects under OpenGL, the ShaderProgramEffect supports effects based on custom shader programs for the GPU. - \since 4.8 - \ingroup qt3d::qml3d - \inherits Effect - - The ShaderProgram class provides Qml/3d users with the ability to use a QGLShaderProgram within the - logical context of the normal \l Effect class provided by Qml/3d. - - If the system does not support shaders, then ShaderProgram will - behave the same as \l Effect, with support for simple lit - materials only. - - \section1 Attributes - - ShaderProgram provides a standard set of 8 vertex attributes that - can be provided via the geometry \l Mesh: - - \table - \header \o Shader Variable \o Mesh Attribute \o Purpose - \row \o \c qt_Vertex \o QGL::Position - \o The primary position of the vertex. - \row \o \c qt_Normal \o QGL::Normal - \o The normal at each vertex, for lit material effects. - \row \o \c qt_Color \o QGL::Color - \o The color at each vertex, for per-vertex color effects. - \row \o \c qt_MultiTexCoord0 \o QGL::TextureCoord0 - \o The texture co-ordinate at each vertex for texture unit 0. - \row \o \c qt_MultiTexCoord1 \o QGL::TextureCoord1 - \o Secondary texture co-ordinate at each vertex. - \row \o \c qt_MultiTexCoord2 \o QGL::TextureCoord2 - \o Tertiary texture co-ordinate at each vertex. - \row \o \c qt_Custom0 \o QGL::CustomVertex0 - \o First custom vertex attribute that can be used for any - user-defined purpose. - \row \o \c qt_Custom1 \o QGL::CustomVertex1 - \o Second custom vertex attribute that can be used for any - user-defined purpose. - \endtable - - These attributes are used in the vertexShader, as in the following - example of a simple texture shader: - - \code - attribute highp vec4 qt_Vertex; - attribute highp vec4 qt_MultiTexCoord0; - uniform mediump mat4 qt_ModelViewProjectionMatrix; - varying highp vec4 texCoord; - - void main(void) - { - gl_Position = qt_ModelViewProjectionMatrix * qt_Vertex; - texCoord = qt_MultiTexCoord0; - } - \endcode - - \section1 Standard uniform variables - - ShaderProgram provides a standard set of uniform variables for - common values from the environment: - - \table - \header \o Shader Variable \o Purpose - \row \o \c qt_ModelViewProjectionMatrix - \o Combination of the modelview and projection matrices into a - single 4x4 matrix. - \row \o \c qt_ModelViewMatrix - \o Modelview matrix without the projection. This is typically - used for performing calculations in eye co-ordinates. - \row \o \c qt_ProjectionMatrix - \o Projection matrix without the modelview. - \row \o \c qt_NormalMatrix - \o Normal matrix, which is the transpose of the inverse of the - top-left 3x3 part of the modelview matrix. This is typically - used in lighting calcuations to transform \c qt_Normal. - \row \o \c qt_WorldMatrix - \o Modelview matrix without the eye position and orientation - component. See QGLPainter::worldMatrix() for further - information. - \row \o \c qt_Texture0 - \o Sampler holding the texture from the Effect::texture property. - \row \o \c qt_Color - \o Set to the value of the Effect::color property. - \endtable - - The above variables are usually declared in the shaders as follows - (where \c highp may be replaced with \c mediump or \c lowp depending - upon the shader's precision requirements): - - \code - uniform highp mat4 qt_ModelViewProjectionMatrix; - uniform highp mat4 qt_ModelViewMatrix; - uniform highp mat3 qt_NormalMatrix; - uniform sampler2D qt_Texture0; - uniform highp vec4 qt_Color; - \endcode - - Other lighting and material values, such as the ambient, diffuse, - and specular colors, can be passed to the shader program using - custom uniform variables, or the standard variable names described - in the QGLShaderProgramEffect documentation. - - \section1 Custom uniform variables - - Many properties defined on the ShaderProgram are automatically exposed as - uniforms for the fragment and vertex shaders under the same name. - - QML and shader types do not match exactly, so the following table shows - how QML properties should be declared in qml compared to shader programs: - - \table - \header \o QML Property \o Shader Program Variable -\row \o \code property double myDouble : 1.0 \endcode \o uniform highp float myDouble; - \row \o \code property real myReal : 1.0 \endcode \o uniform mediump float myReal; - \row \o \code property bool myBoolean : true \endcode \o uniform bool myBoolean; - \row \o \code property int myInt : 1 \endcode \o uniform int myInt; - \row \o \code property variant myPoint : Qt.point(1, 1) \endcode \o uniform mediump vec2 myPoint; - \row \o \code property variant myPointF : Qt.point(1.0, 1.0) \endcode \o uniform mediump vec2 myPointF; - \row \o \code property variant mySize : Qt.size(1.0, 1.0) \endcode \o uniform mediump vec2 mySize; - \row \o \code property color myColor : "#80c342" \endcode \o uniform lowp vec4 myColor; - \row \o \code property variant myMatrix3x3 : - [1.0, 0.0, 0.0, - 0.0, 1.0, 0.0, - 0.0, 0.0, 1.0] \endcode \o uniform mat3 myMatrix3x3; - \row \o \code property variant myMatrix4x4 : - [1.0 , 0.0, 0.0, 0.0, - 0.0, 1.0, 0.0, 0.0, - 0.0, 0.0, 1.0, 0.0, - 0.0, 0.0, 0.0, 1.0 ]\endcode \o uniform mat4 myMatrix4x4; - \row \o \code property string imageExample : - "http://example.com/image.png" \endcode \o uniform sampler2D imageExample; - \endtable - - Note: The precision hints in this table are just examples. highp, - mediump, and lowp do not map directly onto floats, doubles, colors etc. - Choose the most appropriate variable type for your qml or javascript, and - the most appropriate precision for your shader program. - - Be aware that variant properties in general and matrices in particular - can have significant performance implications. Conversion from variants - can be slow, and matrices can consume multiple slots for uniforms, which - are usually limited by hardware. - - String properties are assumed to be urls to images for use in textures. - Where these images are remote, they are loaded in the background and bound - to the effect when they are ready. - \sa QGLGraphicsViewportItem -*/ - -class ShaderProgramEffect; -QT_BEGIN_NAMESPACE - -class ShaderProgramPrivate -{ -public: - ShaderProgramPrivate() - : regenerate(false) - , shadersSupported(true) // Assume supported until known otherwise. - , effect(0) - { - } - - QString vertexShader; - QString fragmentShader; - QUrl vertexShaderSource; - QUrl fragmentShaderSource; - bool regenerate; - bool shadersSupported; - ShaderProgramEffect *effect; -}; - - -/* - \internal - Construction for the ShaderProgramEffect class consists of setting the key parameter values of the - class to undefined. As such, a shader program effect with no further initialisation will do nothing at all - until further creation of shader programs for it has been carried out. -*/ -ShaderProgramEffect::ShaderProgramEffect(ShaderProgram* parent) -{ - this->parent = parent; - nextTextureUnit = 1; - propertyListener = new ShaderProgramPropertyListenerEx(parent, this); -} - -/* - \internal - Destruction entails deletion of the underlying \l QGLShaderProgram which forms the functional core of the - class. -*/ -ShaderProgramEffect::~ShaderProgramEffect() -{ - QList<QGLTexture2D*> textures = texture2Ds.values(); - QGLTexture2D* texture; - foreach (texture, textures) - delete texture; -} - -/* - \internal - The act of shader programe creation can be undertakn in the manner defined for the QGLShaderProgram class. - Failure to successfully carry out creation will result in a warning message. Success will auto-populate the - parameter fields of the ShaderProgramEffect with the necessary values based on the shader program. - - The vertex shader source is defined as a QString in the \a vertexShader parameter, while the fragment shader - is provided in the \a fragmentShader parameter. -*/ -bool ShaderProgramEffect::create - (const QString& vertexShader, const QString& fragmentShader) -{ - if (!QGLShaderProgram::hasOpenGLShaderPrograms()) - return false; - - setVertexShader(vertexShader.toLatin1()); - setFragmentShader(fragmentShader.toLatin1()); - - return true; -} - -/*! - \internal - Convenience function to setup the relationship between object properties - and shader uniforms for later use. - */ -void ShaderProgramEffect::afterLink() -{ - propertyIdsToUniformLocations.clear(); - uniformLocationsToTextureUnits.clear(); - nextTextureUnit = 1; - propertyListener->disconnect(); - if (parent.data() == 0) - { - return; - } - QObject::connect(propertyListener, SIGNAL(propertyChanged()), parent.data(), SIGNAL(effectChanged())); - - const QMetaObject* parentMetaObject = parent.data()->metaObject(); - int parentMethodCount = parentMetaObject->methodCount(); - - for (int i = parentMetaObject->propertyOffset(); - i < parentMetaObject->propertyCount(); i++) - { - QMetaProperty metaProperty = parentMetaObject->property(i); - QByteArray propertyName = metaProperty.name(); - int location = program()->uniformLocation(propertyName); - // -1 indicates that the program does not use the variable, - // so ignore those variables. - if (location != -1) - { - dirtyProperties.append(i); - propertyIdsToUniformLocations[i] = location; - if (metaProperty.hasNotifySignal()) - { - QMetaMethod notifySignal = metaProperty.notifySignal(); - - int signalIndex = notifySignal.methodIndex(); - - // Connect the myFooChanged() signal from the ShaderProgram - // to the corresponding imaginary slot on the listener - // Use the method count to make sure that we don't stomp on - // real methods and add the property index to tell the - // properties apart. - // Warning: Subclasses of ShaderProgramPropertyListener will - // generate spurious property updates and lots of warnings - // and might even crash - QMetaObject::connect(parent.data(), signalIndex, - propertyListener, parentMethodCount + i); - } else { - qWarning() << "Warning: No notification signal found for property: " << propertyName; - propertiesWithoutNotificationSignal.append(i); - } - } - } - - // Refresh everything - this->setPropertiesDirty(); -} - -/*! - \internal - Precondition: list is a list of floats - */ -static inline void setUniformFromFloatList(QGLShaderProgram *program, int uniformLocation, QList<QVariant> list) -{ - switch(list.length()) - { - case 1: - program->setUniformValue(uniformLocation, list.at(0).toFloat()); - break; - case 2: - program->setUniformValue(uniformLocation, - list.at(0).toFloat(), - list.at(1).toFloat()); - break; - case 3: - program->setUniformValue(uniformLocation, - list.at(0).toFloat(), - list.at(1).toFloat(), - list.at(2).toFloat()); - break; - case 4: - program->setUniformValue(uniformLocation, - list.at(0).toFloat(), - list.at(1).toFloat(), - list.at(2).toFloat(), - list.at(3).toFloat()); - break; - case 9: - { - QMatrix3x3 matrix; - for (int i = 0; i < 9; i++) - { - matrix(i / 3, i % 3) = list.at(i).toFloat(); - } - program->setUniformValue(uniformLocation, matrix); - } - break; - case 16: - { - QMatrix4x4 matrix; - for (int i = 0; i < 16; i++) - { - matrix( i / 4, i % 4) = list.at(i).toFloat(); - } - program->setUniformValue(uniformLocation, matrix); - } - break; - default: - // Very little information available to make this warning any more helpful - qWarning() << "Warning: unexpected list size: " << list.size() << ", only 1-4, 9 and 16 supported"; - } -} - -/*! - \internal - This performs all updates for the shader program given a QGLPainter \a painter, and the type of update - being carried out based on the \a updates field, which is an enumeration of the possible painter updates. -*/ -void ShaderProgramEffect::update - (QGLPainter *painter, QGLPainter::Updates updates) -{ - if (changedTextures.count() > 0) - { - foreach (int i, changedTextures) - { - if (!images.contains(i)) - { - changedTextures.remove(i); - continue; - } - - if (!images[i].isNull()) - { - setUniform(i, images[i], painter); - } else - { - qWarning() << "Warning: ShaderProgramEffect failed to apply texture for uniform" << i << (urls.contains(i) ? QLatin1String(" url: ") + urls[i] : QString()); - } - changedTextures.remove(i); - } - } - - // Update the standard uniform variables. - QGLShaderProgramEffect::update(painter, updates); - - // Assign custom properties if they exist - if (!parent.data() || !(propertyIdsToUniformLocations.count() > 0)) - return; - - // update dirty properties and remove them from the list - int propertyIndex; - QList<int> propertiesNotUpdated; - foreach (propertyIndex, dirtyProperties) - { - if (!setUniformForPropertyIndex(propertyIndex, painter)) - { - propertiesNotUpdated.append(propertyIndex); - }; - } - dirtyProperties.clear(); - dirtyProperties.append(propertiesNotUpdated); - - // always update the properties we can't track - foreach (propertyIndex, propertiesWithoutNotificationSignal) - { - setUniformForPropertyIndex(propertyIndex, painter); - } -} - -inline QGLTexture2D* ShaderProgramEffect::textureForUniformValue(int uniformLocation) -{ - QGLTexture2D* result = texture2Ds.value(uniformLocation); - if (result == 0) - { - result = new QGLTexture2D(); - texture2Ds[uniformLocation] = result; - } - return result; -} - -inline bool ShaderProgramEffect::setUniformForPropertyIndex(int propertyIndex, QGLPainter *painter) -{ - QGLShaderProgram *program = this->program(); - int uniformLocation = propertyIdsToUniformLocations[propertyIndex]; - - QVariant value = - parent.data()->metaObject()->property(propertyIndex).read(parent.data()); - - switch(value.type()) - { - case QVariant::Double: - // Convert double to float to pass to shader program - case QMetaType::Float: - program->setUniformValue(uniformLocation, value.toFloat()); - break; - case QVariant::Int: - program->setUniformValue(uniformLocation, value.toInt()); - break; - case QVariant::UInt: - program->setUniformValue(uniformLocation, value.toUInt()); - break; - case QVariant::Bool: - program->setUniformValue(uniformLocation, value.toBool()); - break; - case QVariant::Color: - program->setUniformValue(uniformLocation, value.value<QColor>()); - break; - case QVariant::List: - setUniformFromFloatList(program, uniformLocation, value.toList()); - break; - case QVariant::Point: - program->setUniformValue(uniformLocation, value.toPoint()); - break; - case QVariant::PointF: - program->setUniformValue(uniformLocation, value.toPointF()); - break; - case QVariant::Size: - program->setUniformValue(uniformLocation, value.toSize()); - break; - case QVariant::SizeF: - program->setUniformValue(uniformLocation, value.toSizeF()); - break; - case QVariant::Matrix4x4: - program->setUniformValue(uniformLocation, value.value<QMatrix4x4>()); - break; - case QVariant::Vector2D: - program->setUniformValue(uniformLocation, value.value<QVector2D>()); - break; - case QVariant::Vector3D: - program->setUniformValue(uniformLocation, value.value<QVector3D>()); - break; - case QVariant::Vector4D: - program->setUniformValue(uniformLocation, value.value<QVector4D>()); - break; - case QVariant::String: - { - // We assume strings are URLs to images for textures - QString urlString = value.toString(); - processTextureUrl(uniformLocation, urlString); - } - break; - case QVariant::Image: - { - QImage image(value.toString()); - setUniform(uniformLocation, image, painter); - } - break; - default: - qWarning() << "Unrecognized variant for property " << parent.data()->metaObject()->property(propertyIndex).name() << " of type " << value.typeName() << ", could not set corresponding shader variable"; - } - return true; -} - -/*! - \internal Helper function for applying a \a pixmap to a texture for a shader program. This function should be called from within update() in order to have access to the right GL context through the \a painter. - */ -void ShaderProgramEffect::setUniform - (int uniformLocation, const QPixmap pixmap, QGLPainter* painter) -{ - // TODO: Perspective correction - QGLTexture2D* texture = textureForUniformValue(uniformLocation); - int unit = textureUnitForUniformValue(uniformLocation); - if (texture != 0) - { - texture->setPixmap(pixmap); - painter->glActiveTexture(GL_TEXTURE0 + unit); - texture->bind(); - program()->setUniformValue(uniformLocation, unit); - } -} - -/*! - \internal Helper function for applying an \a images to a texture for a shader program. This function should be called from within update() in order to have access to the right GL context through the \a painter. - */ -void ShaderProgramEffect::setUniform - (int uniformLocation, const QImage& image, QGLPainter* painter) -{ - // TODO: Perspective correction - QGLTexture2D* texture = textureForUniformValue(uniformLocation); - int unit = textureUnitForUniformValue(uniformLocation); - if (texture != 0) - { - texture->setImage(image); - painter->glActiveTexture(GL_TEXTURE0 + unit); - texture->bind(); - program()->setUniformValue(uniformLocation, unit); - } -} - -/*! - \internal Find the texture unit to associate with \a uniformLocation. -*/ -int ShaderProgramEffect::textureUnitForUniformValue(int uniformLocation) -{ - int unit = uniformLocationsToTextureUnits.value(uniformLocation, -1); - if (unit == -1) { - unit = nextTextureUnit++; - uniformLocationsToTextureUnits[uniformLocation] = unit; - } - return unit; -} - -/*! - \internal set all properties dirty so they are reuploaded - next update() - */ -void ShaderProgramEffect::setPropertiesDirty() -{ - dirtyProperties = this->propertyIdsToUniformLocations.keys(); -} - -/*! - \internal Set a specific property as dirty so that it is reuploaded - next update() - */ -void ShaderProgramEffect::setPropertyDirty(int property) -{ - if (dirtyProperties.indexOf(property) == -1) - { - dirtyProperties.append(property); - } -} - -/*! - \internal Update the image for the texture bound at \a uniform location with - the the image at \a urlString. If \a urlString is a remote resource, this - starts an asycnrounous loading process. - - Note: Consecutive calls with the same url for a given uniform are ignored. -*/ -void ShaderProgramEffect::processTextureUrl(int uniformLocation, QString urlString) -{ - QUrl url(http://code.qt.io/urlString); - if (urlString.isEmpty() && - urls.contains(uniformLocation) && - !urls[uniformLocation].isNull()) - { - if (images.contains(uniformLocation) && !images[uniformLocation].isNull()) - { - images[uniformLocation] = QImage(); - urls.remove(uniformLocation); - changedTextures.insert(uniformLocation); - return; - } - }; - - bool async = true; - // Try to make path absolute: - if (url.isRelative()) - { - async = false; - // Get the baseUrl from the declarative engine - QDeclarativeContext *context = - QDeclarativeEngine::contextForObject(parent.data()); - - if (context) - { - QUrl baseurl = context->baseUrl(); - QUrl absolute = baseurl.resolved(urlString); - - if (absolute.isValid()) - { - url = absolute; - urlString = absolute.toString(); - } else { - qWarning() << "Warning: failed to resolve relative path " << - urlString; - } - } - }; - - if (urlString != urls[uniformLocation]) - { - if (url.scheme() != QLatin1String("file")) - { - // TODO - support network URL's for loading - note that this feature is for - // the Qt3D 1.1 release and there is no point in implementing it until for example - // model loading and all other parts of Qt3D support it. Also when it is implemented - // it has to be done with a facility that does not depend on private headers in - // QtDeclarative which can change within minor dot-point releases. - qWarning("Network URL's not yet supported - %s", qPrintable(urlString)); - } - else - { - QString localFile = url.toLocalFile(); - if (localFile.endsWith(QLatin1String(".dds"))) - { - qWarning("Shader effects with compressed textures not supported: %s", - qPrintable(urlString)); - } - else - { - QImage im(localFile); - if (im.isNull()) - { - qWarning("Could not load image from local file path - %s", qPrintable(localFile)); - } - else - { - images[uniformLocation] = im; - changedTextures.insert(uniformLocation); - } - } - } - } -} - -/*! - \internal - Construction of the shader program and assignment of its \a parent object. -*/ -ShaderProgram::ShaderProgram(QObject *parent) - : QDeclarativeEffect(parent) -{ - d = new ShaderProgramPrivate(); -} - -/*! - \internal - Destruction of the ShaderProgram entails deletion of private data, and explicit deletion of the - underlying ShaderProgramEffect defined by the class. -*/ -ShaderProgram::~ShaderProgram() -{ - delete d->effect; - delete d; -} - -/*! - \qmlproperty string ShaderProgram::vertexShader - - This property defines the source for the vertex shader to be implemented by this - instance of the ShaderProgram. This property and the vertexShaderSource() - property both effect the same underlying object, so setting one will override - the other. - - \sa fragmentShader, vertexShaderSource -*/ -QString ShaderProgram::vertexShader() const -{ - return d->vertexShader; -} - -void ShaderProgram::setVertexShader(const QString& value) -{ - if (!d->vertexShaderSource.isEmpty() || value != d->vertexShader) - { - d->vertexShader = value; - d->regenerate = true; - d->vertexShaderSource = QUrl(); - emit shaderChanged(); - emit effectChanged(); - } -} - -/*! - \qmlproperty string ShaderProgram::fragmentShader - This property defines the source for the fragment shader (ie. pixel shader) to be - implemented by this instance of the ShaderProgram. This property and the - fragmentShaderSource() property both effect the same underlying object, so - setting one will override the other. - - \sa vertexShader, fragmentShaderSource -*/ -QString ShaderProgram::fragmentShader() const -{ - return d->fragmentShader; -} - -void ShaderProgram::setFragmentShader(const QString& value) -{ - if (!d->fragmentShaderSource.isEmpty() || value != d->fragmentShader) - { - d->fragmentShader = value; - d->regenerate = true; - d->fragmentShaderSource = QUrl(); - emit shaderChanged(); - emit effectChanged(); - } -} - -/*! - \qmlproperty QUrl ShaderProgram::vertexShaderSource - This property allows the source for the vertex shader to be set to the contents - of a file containing shader source code. This property and the vertexShader() - property both effect the same underlying object, so setting one will override - the other. - - Note that at present networked URLs are not supported, only local files. If a - URL has not been set for the vertex shader, for example because it was - specified via the vertexShader() in-line shader code property, then this property - will return a null (empty) QUrl. - - \sa vertexShader, fragmentShaderSource -*/ -QUrl ShaderProgram::vertexShaderSource() const -{ - return d->vertexShaderSource; -} - -void ShaderProgram::setVertexShaderSource(const QUrl &url) -{ - if (!url.isEmpty() && url.isValid() && url != d->vertexShaderSource) - { - if (url.scheme() == QLatin1String("file")) - { - QString fn = url.toLocalFile(); - QFile vs(fn); - if (vs.open(QIODevice::ReadOnly)) - { - d->vertexShader = vs.readAll(); - d->vertexShaderSource = url; - emit shaderChanged(); - emit effectChanged(); - d->regenerate = true; - } - else - { - qWarning() << "Unable to read" << url; - } - } - else - { - qWarning() << "vertexShaderSource property does not (yet) support non-file URLs"; - } - } -} - -/*! - \qmlproperty QUrl ShaderProgram::fragmentShaderSource - This property allows the source for the fragment shader to be set to the contents - of a file containing shader source code. This property and the vertexShader() - property both effect the same underlying object, so setting one will override - the other. - - Note that at present networked URLs are not supported, only local files. If a - URL has not been set for the fragment shader, for example because it was - specified via the fragmentShader() in-line shader code property, then this property - will return a null (empty) QUrl. - - \sa fragmentShader, vertexShaderSource -*/ -QUrl ShaderProgram::fragmentShaderSource() const -{ - return d->fragmentShaderSource; -} - -void ShaderProgram::setFragmentShaderSource(const QUrl &url) -{ - if (!url.isEmpty() && url.isValid() && url != d->fragmentShaderSource) - { - if (url.scheme() == QLatin1String("file")) - { - QString fn = url.toLocalFile(); - QFile fs(fn); - if (fs.open(QIODevice::ReadOnly)) - { - d->fragmentShader = fs.readAll(); - d->fragmentShaderSource = url; - emit shaderChanged(); - emit effectChanged(); - d->regenerate = true; - } - else - { - qWarning() << "Unable to read fragment shader" << url; - } - } - else - { - qWarning() << "fragmentShaderSource property does not (yet) support non-file URLs"; - } - } -} - -/*! - \internal - Enables the effect for a given \a painter. If the effect has not been created yet, this function will - attempt to do so. -*/ -void ShaderProgram::enableEffect(QGLPainter *painter) -{ - if (!d->shadersSupported && !d->regenerate) { - // Use a simple fallback effect. - QDeclarativeEffect::enableEffect(painter); - return; - } - if (!d->effect) { - // note that the ShaderProgramEffect can also be created when this - // effect is applied to a QGLSceneNode if that happens first - d->effect = new ShaderProgramEffect(this); - if (!d->effect->create(d->vertexShader, d->fragmentShader)) { - delete d->effect; - d->effect = 0; - QDeclarativeEffect::enableEffect(painter); - d->regenerate = false; - d->shadersSupported = false; - return; - } - d->shadersSupported = true; - } else if (d->regenerate) { - if (!d->effect->create(d->vertexShader, d->fragmentShader)) { - delete d->effect; - d->effect = 0; - QDeclarativeEffect::enableEffect(painter); - d->regenerate = false; - d->shadersSupported = false; - return; - } - d->shadersSupported = true; - } - d->regenerate = false; - painter->setUserEffect(d->effect); - painter->setColor(color()); - QGLTexture2D *tex = texture2D(); - painter->glActiveTexture(GL_TEXTURE0); - if (tex) - tex->bind(); - else - glBindTexture(GL_TEXTURE_2D, 0); -} - -/*! - \internal - Set a scenenode's material and effect properties to enact this effect. - - This can happen before glInitialize, so setup is delayed until the effect is - used or explicitly initialized. -*/ -void ShaderProgram::applyTo(QGLSceneNode *node) -{ - if (!d->effect) { - // This function is often called during setup, before glInitilization, - // so create the effect now, and then initializion it later. - d->effect = new ShaderProgramEffect(this); - d->regenerate = true; - } - node->setUserEffect(d->effect); -} - -/*! - \internal - Mark all properties as dirty to be re-uploaded in the next update -*/ -void ShaderProgram::markAllPropertiesDirty() -{ - d->effect->setPropertiesDirty(); -} - -/*! - \internal - Mark a \a property as dirty to be re-uploaded in the next update - */ -void ShaderProgram::markPropertyDirty(int property) -{ - d->effect->setPropertyDirty(property); -} - -/*! - \qmlsignal ShaderProgram::onFinishedLoading() - Emitted when the last remote resource request is resolved, and implies that - the effect is ready to be displayed. -*/ - -/*! - \internal - A subclass without the Q_OBJECT macro in order to use the qt_metacall trick to track property changes. - - It is also conveniently placed to connect appropriate properties to - Effect::effectChanged() to trigger timely updates. - */ -ShaderProgramPropertyListenerEx::ShaderProgramPropertyListenerEx(ShaderProgram *parent, ShaderProgramEffect* effect) - : ShaderProgramPropertyListener(parent), effect(effect) -{ - shaderProgramMethodCount = parent->metaObject()->methodCount(); -} - -/*! - \internal -*/ -ShaderProgramPropertyListenerEx::~ShaderProgramPropertyListenerEx() -{ -} - -/*! - \internal - Find calls to the "imaginary" slots, and mark the appropriate property - as dirty. -*/ -int ShaderProgramPropertyListenerEx::qt_metacall(QMetaObject::Call c, int id, void **a) -{ - if (c == QMetaObject::InvokeMetaMethod ) - { - if (id >= shaderProgramMethodCount) { - effect->setPropertyDirty(id - shaderProgramMethodCount); - emit propertyChanged(); - } - // Consume the metacall - return -1; - } - - return ShaderProgramPropertyListener::qt_metacall(c, id, a); -} - -QT_END_NAMESPACE |