diff options
Diffstat (limited to 'examples/opengl/contextinfo/renderwindow.cpp')
-rw-r--r-- | examples/opengl/contextinfo/renderwindow.cpp | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/examples/opengl/contextinfo/renderwindow.cpp b/examples/opengl/contextinfo/renderwindow.cpp deleted file mode 100644 index 64c0f47db9..0000000000 --- a/examples/opengl/contextinfo/renderwindow.cpp +++ /dev/null @@ -1,191 +0,0 @@ -// Copyright (C) 2016 The Qt Company Ltd. -// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause - -#include "renderwindow.h" -#include <QTimer> -#include <QMatrix4x4> -#include <QOpenGLContext> -#include <QtOpenGL/QOpenGLShaderProgram> -#include <QOpenGLFunctions> - -RenderWindow::RenderWindow(const QSurfaceFormat &format) - : m_context(nullptr), - m_initialized(false), - m_forceGLSL110(false), - m_angle(0.0f) -{ - setSurfaceType(QWindow::OpenGLSurface); - setFormat(format); - m_context = new QOpenGLContext(this); - m_context->setFormat(requestedFormat()); - if (!m_context->create()) { - delete m_context; - m_context = nullptr; - } -} - -void RenderWindow::exposeEvent(QExposeEvent *) -{ - if (isExposed()) - render(); -} - -// ES needs the precision qualifiers. -// On desktop GL QOpenGLShaderProgram inserts dummy defines for highp/mediump/lowp. -static const char *vertexShaderSource110 = - "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 *fragmentShaderSource110 = - "varying lowp vec4 col;\n" - "void main() {\n" - " gl_FragColor = col;\n" - "}\n"; - -static const char *vertexShaderSource = - "#version 150\n" - "in vec4 posAttr;\n" - "in vec4 colAttr;\n" - "out vec4 col;\n" - "uniform mat4 matrix;\n" - "void main() {\n" - " col = colAttr;\n" - " gl_Position = matrix * posAttr;\n" - "}\n"; - -static const char *fragmentShaderSource = - "#version 150\n" - "in vec4 col;\n" - "out vec4 fragColor;\n" - "void main() {\n" - " fragColor = col;\n" - "}\n"; - -static GLfloat vertices[] = { - 0.0f, 0.707f, - -0.5f, -0.5f, - 0.5f, -0.5f -}; - -static GLfloat colors[] = { - 1.0f, 0.0f, 0.0f, - 0.0f, 1.0f, 0.0f, - 0.0f, 0.0f, 1.0f -}; - -void RenderWindow::init() -{ - m_program = new QOpenGLShaderProgram(this); - - QSurfaceFormat format = m_context->format(); - bool useNewStyleShader = format.profile() == QSurfaceFormat::CoreProfile; - // Try to handle 3.0 & 3.1 that do not have the core/compatibility profile concept 3.2+ has. - // This may still fail since version 150 (3.2) is specified in the sources but it's worth a try. - if (format.renderableType() == QSurfaceFormat::OpenGL && format.majorVersion() == 3 && format.minorVersion() <= 1) - useNewStyleShader = !format.testOption(QSurfaceFormat::DeprecatedFunctions); - if (m_forceGLSL110) - useNewStyleShader = false; - - const char *vsrc = useNewStyleShader ? vertexShaderSource : vertexShaderSource110; - const char *fsrc = useNewStyleShader ? fragmentShaderSource : fragmentShaderSource110; - qDebug("Using version %s shader", useNewStyleShader ? "150" : "110"); - - if (!m_program->addShaderFromSourceCode(QOpenGLShader::Vertex, vsrc)) { - emit error(m_program->log()); - return; - } - if (!m_program->addShaderFromSourceCode(QOpenGLShader::Fragment, fsrc)) { - emit error(m_program->log()); - return; - } - if (!m_program->link()) { - emit error(m_program->log()); - return; - } - - m_posAttr = m_program->attributeLocation("posAttr"); - m_colAttr = m_program->attributeLocation("colAttr"); - m_matrixUniform = m_program->uniformLocation("matrix"); - - m_vbo.create(); - m_vbo.bind(); - m_vbo.allocate(vertices, sizeof(vertices) + sizeof(colors)); - m_vbo.write(sizeof(vertices), colors, sizeof(colors)); - m_vbo.release(); - - QOpenGLVertexArrayObject::Binder vaoBinder(&m_vao); - if (m_vao.isCreated()) // have VAO support, use it - setupVertexAttribs(); -} - -void RenderWindow::setupVertexAttribs() -{ - m_vbo.bind(); - m_program->setAttributeBuffer(m_posAttr, GL_FLOAT, 0, 2); - m_program->setAttributeBuffer(m_colAttr, GL_FLOAT, sizeof(vertices), 3); - m_program->enableAttributeArray(m_posAttr); - m_program->enableAttributeArray(m_colAttr); - m_vbo.release(); -} - -bool RenderWindow::event(QEvent *ev) -{ - if (ev->type() == QEvent::UpdateRequest) - render(); - return QWindow::event(ev); -} - -void RenderWindow::render() -{ - if (!m_context->makeCurrent(this)) { - emit error(tr("makeCurrent() failed")); - return; - } - - QOpenGLFunctions *f = m_context->functions(); - if (!m_initialized) { - m_initialized = true; - f->glEnable(GL_DEPTH_TEST); - f->glClearColor(0, 0, 0, 1); - init(); - emit ready(); - } - - if (!m_vbo.isCreated()) // init() failed, don't bother with trying to render - return; - - const qreal retinaScale = devicePixelRatio(); - f->glViewport(0, 0, width() * retinaScale, height() * retinaScale); - f->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - m_program->bind(); - QMatrix4x4 matrix; - matrix.perspective(60.0f, 4.0f / 3.0f, 0.1f, 100.0f); - matrix.translate(0.0f, 0.0f, -2.0f); - matrix.rotate(m_angle, 0.0f, 1.0f, 0.0f); - m_program->setUniformValue(m_matrixUniform, matrix); - - if (m_vao.isCreated()) - m_vao.bind(); - else // no VAO support, set the vertex attribute arrays now - setupVertexAttribs(); - - f->glDrawArrays(GL_TRIANGLES, 0, 3); - - m_vao.release(); - m_program->release(); - - // swapInterval is 1 by default which means that swapBuffers() will (hopefully) block - // and wait for vsync. - m_context->swapBuffers(this); - - m_angle += 1.0f; - - requestUpdate(); -} |