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Diffstat (limited to 'examples/gui/openglwindow/main.cpp')
| -rw-r--r-- | examples/gui/openglwindow/main.cpp | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/examples/gui/openglwindow/main.cpp b/examples/gui/openglwindow/main.cpp deleted file mode 100644 index 03a6ece06f..0000000000 --- a/examples/gui/openglwindow/main.cpp +++ /dev/null @@ -1,177 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the documentation 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 "openglwindow.h" - -#include <QGuiApplication> -#include <QMatrix4x4> -#include <QOpenGLShaderProgram> -#include <QScreen> -#include <QtMath> - - -//! [1] -class TriangleWindow : public OpenGLWindow -{ -public: - using OpenGLWindow::OpenGLWindow; - - void initialize() override; - void render() override; - -private: - GLint m_posAttr = 0; - GLint m_colAttr = 0; - GLint m_matrixUniform = 0; - - QOpenGLShaderProgram *m_program = nullptr; - int m_frame = 0; -}; -//! [1] - -//! [2] -int main(int argc, char **argv) -{ - QGuiApplication app(argc, argv); - - QSurfaceFormat format; - format.setSamples(16); - - TriangleWindow window; - window.setFormat(format); - window.resize(640, 480); - window.show(); - - window.setAnimating(true); - - return app.exec(); -} -//! [2] - - -//! [3] -static const char *vertexShaderSource = - "attribute highp vec4 posAttr;\n" - "attribute lowp vec4 colAttr;\n" - "varying lowp vec4 col;\n" - "uniform highp mat4 matrix;\n" - "void main() {\n" - " col = colAttr;\n" - " gl_Position = matrix * posAttr;\n" - "}\n"; - -static const char *fragmentShaderSource = - "varying lowp vec4 col;\n" - "void main() {\n" - " gl_FragColor = col;\n" - "}\n"; -//! [3] - -//! [4] -void TriangleWindow::initialize() -{ - m_program = new QOpenGLShaderProgram(this); - m_program->addShaderFromSourceCode(QOpenGLShader::Vertex, vertexShaderSource); - m_program->addShaderFromSourceCode(QOpenGLShader::Fragment, fragmentShaderSource); - m_program->link(); - m_posAttr = m_program->attributeLocation("posAttr"); - Q_ASSERT(m_posAttr != -1); - m_colAttr = m_program->attributeLocation("colAttr"); - Q_ASSERT(m_colAttr != -1); - m_matrixUniform = m_program->uniformLocation("matrix"); - Q_ASSERT(m_matrixUniform != -1); -} -//! [4] - -//! [5] -void TriangleWindow::render() -{ - const qreal retinaScale = devicePixelRatio(); - glViewport(0, 0, width() * retinaScale, height() * retinaScale); - - glClear(GL_COLOR_BUFFER_BIT); - - m_program->bind(); - - QMatrix4x4 matrix; - matrix.perspective(60.0f, 4.0f / 3.0f, 0.1f, 100.0f); - matrix.translate(0, 0, -2); - matrix.rotate(100.0f * m_frame / screen()->refreshRate(), 0, 1, 0); - - m_program->setUniformValue(m_matrixUniform, matrix); - - static const GLfloat vertices[] = { - 0.0f, 0.707f, - -0.5f, -0.5f, - 0.5f, -0.5f - }; - - static const GLfloat colors[] = { - 1.0f, 0.0f, 0.0f, - 0.0f, 1.0f, 0.0f, - 0.0f, 0.0f, 1.0f - }; - - glVertexAttribPointer(m_posAttr, 2, GL_FLOAT, GL_FALSE, 0, vertices); - glVertexAttribPointer(m_colAttr, 3, GL_FLOAT, GL_FALSE, 0, colors); - - glEnableVertexAttribArray(m_posAttr); - glEnableVertexAttribArray(m_colAttr); - - glDrawArrays(GL_TRIANGLES, 0, 3); - - glDisableVertexAttribArray(m_colAttr); - glDisableVertexAttribArray(m_posAttr); - - m_program->release(); - - ++m_frame; -} -//! [5] |