| /**************************************************************************** |
| ** |
| ** Copyright (C) 2017 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the examples of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:BSD$ |
| ** 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. |
| ** |
| ** BSD License Usage |
| ** Alternatively, 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 The Qt Company Ltd 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/QRandomGenerator> |
| #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: |
| NoisyShader() { |
| setShaderSourceFile(QOpenGLShader::Vertex, ":/scenegraph/graph/shaders/noisy.vsh"); |
| setShaderSourceFile(QOpenGLShader::Fragment, ":/scenegraph/graph/shaders/noisy.fsh"); |
| } |
| |
| QList<QByteArray> attributes() const override { return QList<QByteArray>() << "aVertex" << "aTexCoord"; } |
| |
| void updateState(const NoisyMaterial *m, const NoisyMaterial *) override { |
| |
| // 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() override { |
| 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 = -1; |
| int id_texture = -1; |
| int id_textureSize = -1; |
| }; |
| |
| 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 = QRandomGenerator::global()->bounded(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); |
| } |