diff options
Diffstat (limited to 'examples/opengl/qopenglwindow/background_renderer.cpp')
| -rw-r--r-- | examples/opengl/qopenglwindow/background_renderer.cpp | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/examples/opengl/qopenglwindow/background_renderer.cpp b/examples/opengl/qopenglwindow/background_renderer.cpp deleted file mode 100644 index acbbe74841..0000000000 --- a/examples/opengl/qopenglwindow/background_renderer.cpp +++ /dev/null @@ -1,214 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 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 "background_renderer.h" - -#include <qmath.h> -#include <QFileInfo> -#include <QTime> - -#include <QOpenGLShaderProgram> -#include <QOpenGLContext> -#include <QOpenGLFunctions> - -#include <math.h> - -static const char vertex_shader[] = - "attribute highp vec3 vertexCoord;" - "void main() {" - " gl_Position = vec4(vertexCoord,1.0);" - "}"; - -static const char fragment_shader[] = - "void main() {" - " gl_FragColor = vec4(0.0,1.0,0.0,1.0);" - "}"; - -static const float vertices[] = { -1, -1, 0, - -1, 1, 0, - 1, -1, 0, - 1, 1, 0 }; - -FragmentToy::FragmentToy(const QString &fragmentSource, QObject *parent) - : QObject(parent) - , m_recompile_shaders(true) -{ - if (QFile::exists(fragmentSource)) { - QFileInfo info(fragmentSource); - m_fragment_file_last_modified = info.lastModified(); - m_fragment_file = fragmentSource; -#if QT_CONFIG(filesystemwatcher) - m_watcher.addPath(info.canonicalPath()); - QObject::connect(&m_watcher, &QFileSystemWatcher::directoryChanged, this, &FragmentToy::fileChanged); -#endif - } -} - -FragmentToy::~FragmentToy() - = default; - -void FragmentToy::draw(const QSize &windowSize) -{ - if (!m_program) - initializeOpenGLFunctions(); - - glDisable(GL_STENCIL_TEST); - glDisable(GL_DEPTH_TEST); - - glClearColor(0, 0, 0, 1); - glClear(GL_COLOR_BUFFER_BIT); - if (!m_vao.isCreated()) - m_vao.create(); - - QOpenGLVertexArrayObject::Binder binder(&m_vao); - - if (!m_vertex_buffer.isCreated()) { - m_vertex_buffer.create(); - m_vertex_buffer.bind(); - m_vertex_buffer.allocate(vertices, sizeof(vertices)); - m_vertex_buffer.release(); - } - - if (!m_program) { - m_program.reset(new QOpenGLShaderProgram); - m_program->create(); - m_vertex_shader.reset(new QOpenGLShader(QOpenGLShader::Vertex)); - if (!m_vertex_shader->compileSourceCode(vertex_shader)) { - qWarning() << "Failed to compile the vertex shader:" << m_vertex_shader->log(); - } - if (!m_program->addShader(m_vertex_shader.get())) { - qWarning() << "Failed to add vertex shader to program:" << m_program->log(); - } - } - - if (!m_fragment_shader && m_recompile_shaders) { - QByteArray data; - if (m_fragment_file.size()) { - QFile file(m_fragment_file); - if (file.open(QIODevice::ReadOnly)) { - data = file.readAll(); - } else { - qWarning() << "Failed to load input file, falling back to default"; - data = QByteArray::fromRawData(fragment_shader, sizeof(fragment_shader)); - } - } else { - QFile qrcFile(":/background.frag"); - if (qrcFile.open(QIODevice::ReadOnly)) - data = qrcFile.readAll(); - else - data = QByteArray::fromRawData(fragment_shader, sizeof(fragment_shader)); - } - if (data.size()) { - m_fragment_shader.reset(new QOpenGLShader(QOpenGLShader::Fragment)); - if (!m_fragment_shader->compileSourceCode(data)) { - qWarning() << "Failed to compile fragment shader:" << m_fragment_shader->log(); - m_fragment_shader.reset(nullptr); - } - } else { - qWarning() << "Unknown error, no fragment shader"; - } - - if (m_fragment_shader) { - if (!m_program->addShader(m_fragment_shader.get())) { - qWarning() << "Failed to add fragment shader to program:" << m_program->log(); - } - } - } - - if (m_recompile_shaders) { - m_recompile_shaders = false; - - if (m_program->link()) { - m_vertex_coord_pos = m_program->attributeLocation("vertexCoord"); - } else { - qWarning() << "Failed to link shader program" << m_program->log(); - } - - } - - if (!m_program->isLinked()) - return; - - m_program->bind(); - - m_vertex_buffer.bind(); - m_program->setAttributeBuffer("vertexCoord", GL_FLOAT, 0, 3, 0); - m_program->enableAttributeArray("vertexCoord"); - m_vertex_buffer.release(); - - m_program->setUniformValue("currentTime", (uint) QDateTime::currentMSecsSinceEpoch()); - m_program->setUniformValue("windowSize", windowSize); - - QOpenGLContext::currentContext()->functions()->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); - - m_program->release(); -} - -void FragmentToy::fileChanged(const QString &path) -{ - Q_UNUSED(path); - if (QFile::exists(m_fragment_file)) { - QFileInfo fragment_source(m_fragment_file); - if (fragment_source.lastModified() > m_fragment_file_last_modified) { - m_fragment_file_last_modified = fragment_source.lastModified(); - m_recompile_shaders = true; - if (m_program) { - m_program->removeShader(m_fragment_shader.get()); - m_fragment_shader.reset(nullptr); - } - } - } else { - m_recompile_shaders = true; - if (m_program) { - m_program->removeShader(m_fragment_shader.get()); - m_fragment_shader.reset(nullptr); - } - } -} |