diff options
Diffstat (limited to 'examples/quick/scenegraph/graph/noisynode.cpp')
-rw-r--r-- | examples/quick/scenegraph/graph/noisynode.cpp | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/examples/quick/scenegraph/graph/noisynode.cpp b/examples/quick/scenegraph/graph/noisynode.cpp new file mode 100644 index 0000000000..1fc87a2b97 --- /dev/null +++ b/examples/quick/scenegraph/graph/noisynode.cpp @@ -0,0 +1,142 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names +** of its contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "noisynode.h" + +#include <QtCore/QResource> + +#include <QtQuick/QSGSimpleMaterialShader> +#include <QtQuick/QSGTexture> +#include <QtQuick/QQuickWindow> + +#define NOISE_SIZE 64 + +struct NoisyMaterial +{ + ~NoisyMaterial() { + delete texture; + } + + QColor color; + QSGTexture *texture; +}; + +class NoisyShader : public QSGSimpleMaterialShader<NoisyMaterial> +{ + QSG_DECLARE_SIMPLE_SHADER(NoisyShader, NoisyMaterial) + +public: + const char *vertexShader() const { + QResource r(":/scenegraph/graph/shaders/noisy.vsh"); + Q_ASSERT(r.isValid()); + return (const char *) r.data(); + } + + const char *fragmentShader() const { + QResource r(":/scenegraph/graph/shaders/noisy.fsh"); + Q_ASSERT(r.isValid()); + return (const char *) r.data(); + } + + QList<QByteArray> attributes() const { return QList<QByteArray>() << "aVertex" << "aTexCoord"; } + + void updateState(const NoisyMaterial *m, const NoisyMaterial *) { + + // Set the color + program()->setUniformValue(id_color, m->color); + + // Bind the texture and set program to use texture unit 0 (the default) + m->texture->bind(); + + // Then set the texture size so we can adjust the texture coordinates accordingly in the + // vertex shader.. + QSize s = m->texture->textureSize(); + program()->setUniformValue(id_textureSize, QSizeF(1.0 / s.width(), 1.0 / s.height())); + } + + void resolveUniforms() { + id_texture = program()->uniformLocation("texture"); + id_textureSize = program()->uniformLocation("textureSize"); + id_color = program()->uniformLocation("color"); + + // We will only use texture unit 0, so set it only once. + program()->setUniformValue(id_texture, 0); + } + +private: + int id_color; + int id_texture; + int id_textureSize; +}; + +NoisyNode::NoisyNode(QQuickWindow *window) +{ + // Make some noise... + QImage image(NOISE_SIZE, NOISE_SIZE, QImage::Format_RGB32); + uint *data = (uint *) image.bits(); + for (int i=0; i<NOISE_SIZE * NOISE_SIZE; ++i) { + uint g = rand() & 0xff; + data[i] = 0xff000000 | (g << 16) | (g << 8) | g; + } + + QSGTexture *t = window->createTextureFromImage(image); + t->setFiltering(QSGTexture::Nearest); + t->setHorizontalWrapMode(QSGTexture::Repeat); + t->setVerticalWrapMode(QSGTexture::Repeat); + + QSGSimpleMaterial<NoisyMaterial> *m = NoisyShader::createMaterial(); + m->state()->texture = t; + m->state()->color = QColor::fromRgbF(0.95, 0.95, 0.97); + m->setFlag(QSGMaterial::Blending); + + setMaterial(m); + setFlag(OwnsMaterial, true); + + QSGGeometry *g = new QSGGeometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), 4); + QSGGeometry::updateTexturedRectGeometry(g, QRect(), QRect()); + setGeometry(g); + setFlag(OwnsGeometry, true); +} + +void NoisyNode::setRect(const QRectF &bounds) +{ + QSGGeometry::updateTexturedRectGeometry(geometry(), bounds, QRectF(0, 0, 1, 1)); + markDirty(QSGNode::DirtyGeometry); +} |