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-rw-r--r--examples/opengl/threadedqopenglwidget/glwidget.cpp255
1 files changed, 3 insertions, 252 deletions
diff --git a/examples/opengl/threadedqopenglwidget/glwidget.cpp b/examples/opengl/threadedqopenglwidget/glwidget.cpp
index 2101575fd4a..8ffbddd2e35 100644
--- a/examples/opengl/threadedqopenglwidget/glwidget.cpp
+++ b/examples/opengl/threadedqopenglwidget/glwidget.cpp
@@ -1,6 +1,6 @@
/****************************************************************************
**
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2022 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
@@ -49,6 +49,8 @@
****************************************************************************/
#include "glwidget.h"
+#include "renderer.h"
+
#include <qmath.h>
#include <QGuiApplication>
@@ -114,254 +116,3 @@ void GLWidget::grabContext()
m_renderer->grabCond()->wakeAll();
m_renderer->unlockRenderer();
}
-
-Renderer::Renderer(GLWidget *w) : m_glwidget(w) {}
-
-void Renderer::paintQtLogo()
-{
- vbo.bind();
- program.setAttributeBuffer(vertexAttr, GL_FLOAT, 0, 3);
- program.setAttributeBuffer(normalAttr, GL_FLOAT, vertices.count() * 3 * sizeof(GLfloat), 3);
- vbo.release();
-
- program.enableAttributeArray(vertexAttr);
- program.enableAttributeArray(normalAttr);
-
- glDrawArrays(GL_TRIANGLES, 0, vertices.size());
-
- program.disableAttributeArray(normalAttr);
- program.disableAttributeArray(vertexAttr);
-}
-
-// Some OpenGL implementations have serious issues with compiling and linking
-// shaders on multiple threads concurrently. Avoid this.
-Q_GLOBAL_STATIC(QMutex, initMutex)
-
-void Renderer::render()
-{
- if (m_exiting)
- return;
-
- QOpenGLContext *ctx = m_glwidget->context();
- if (!ctx) // QOpenGLWidget not yet initialized
- return;
-
- // Grab the context.
- m_grabMutex.lock();
- emit contextWanted();
- m_grabCond.wait(&m_grabMutex);
- QMutexLocker lock(&m_renderMutex);
- m_grabMutex.unlock();
-
- if (m_exiting)
- return;
-
- Q_ASSERT(ctx->thread() == QThread::currentThread());
-
- // Make the context (and an offscreen surface) current for this thread. The
- // QOpenGLWidget's fbo is bound in the context.
- m_glwidget->makeCurrent();
-
- if (!m_inited) {
- m_inited = true;
- initializeOpenGLFunctions();
-
- QMutexLocker initLock(initMutex());
- QOpenGLShader *vshader = new QOpenGLShader(QOpenGLShader::Vertex, this);
- const char *vsrc =
- "attribute highp vec4 vertex;\n"
- "attribute mediump vec3 normal;\n"
- "uniform mediump mat4 matrix;\n"
- "varying mediump vec4 color;\n"
- "void main(void)\n"
- "{\n"
- " vec3 toLight = normalize(vec3(0.0, 0.3, 1.0));\n"
- " float angle = max(dot(normal, toLight), 0.0);\n"
- " vec3 col = vec3(0.40, 1.0, 0.0);\n"
- " color = vec4(col * 0.2 + col * 0.8 * angle, 1.0);\n"
- " color = clamp(color, 0.0, 1.0);\n"
- " gl_Position = matrix * vertex;\n"
- "}\n";
- vshader->compileSourceCode(vsrc);
-
- QOpenGLShader *fshader = new QOpenGLShader(QOpenGLShader::Fragment, this);
- const char *fsrc =
- "varying mediump vec4 color;\n"
- "void main(void)\n"
- "{\n"
- " gl_FragColor = color;\n"
- "}\n";
- fshader->compileSourceCode(fsrc);
-
- program.addShader(vshader);
- program.addShader(fshader);
- program.link();
-
- vertexAttr = program.attributeLocation("vertex");
- normalAttr = program.attributeLocation("normal");
- matrixUniform = program.uniformLocation("matrix");
-
- m_fAngle = 0;
- m_fScale = 1;
- createGeometry();
-
- vbo.create();
- vbo.bind();
- const int verticesSize = vertices.count() * 3 * sizeof(GLfloat);
- vbo.allocate(verticesSize * 2);
- vbo.write(0, vertices.constData(), verticesSize);
- vbo.write(verticesSize, normals.constData(), verticesSize);
-
- m_elapsed.start();
- }
-
- //qDebug("%p elapsed %lld", QThread::currentThread(), m_elapsed.restart());
-
- glClearColor(0.1f, 0.2f, 0.2f, 1.0f);
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glFrontFace(GL_CW);
- glCullFace(GL_FRONT);
- glEnable(GL_CULL_FACE);
- glEnable(GL_DEPTH_TEST);
-
- QMatrix4x4 modelview;
- modelview.rotate(m_fAngle, 0.0f, 1.0f, 0.0f);
- modelview.rotate(m_fAngle, 1.0f, 0.0f, 0.0f);
- modelview.rotate(m_fAngle, 0.0f, 0.0f, 1.0f);
- modelview.scale(m_fScale);
- modelview.translate(0.0f, -0.2f, 0.0f);
-
- program.bind();
- program.setUniformValue(matrixUniform, modelview);
- paintQtLogo();
- program.release();
-
- glDisable(GL_DEPTH_TEST);
- glDisable(GL_CULL_FACE);
-
- m_fAngle += 1.0f;
-
- // Make no context current on this thread and move the QOpenGLWidget's
- // context back to the gui thread.
- m_glwidget->doneCurrent();
- ctx->moveToThread(qGuiApp->thread());
-
- // Schedule composition. Note that this will use QueuedConnection, meaning
- // that update() will be invoked on the gui thread.
- QMetaObject::invokeMethod(m_glwidget, "update");
-}
-
-void Renderer::createGeometry()
-{
- vertices.clear();
- normals.clear();
-
- qreal x1 = +0.06f;
- qreal y1 = -0.14f;
- qreal x2 = +0.14f;
- qreal y2 = -0.06f;
- qreal x3 = +0.08f;
- qreal y3 = +0.00f;
- qreal x4 = +0.30f;
- qreal y4 = +0.22f;
-
- quad(x1, y1, x2, y2, y2, x2, y1, x1);
- quad(x3, y3, x4, y4, y4, x4, y3, x3);
-
- extrude(x1, y1, x2, y2);
- extrude(x2, y2, y2, x2);
- extrude(y2, x2, y1, x1);
- extrude(y1, x1, x1, y1);
- extrude(x3, y3, x4, y4);
- extrude(x4, y4, y4, x4);
- extrude(y4, x4, y3, x3);
-
- const int NumSectors = 100;
- const qreal sectorAngle = 2 * qreal(M_PI) / NumSectors;
-
- for (int i = 0; i < NumSectors; ++i) {
- qreal angle = i * sectorAngle;
- qreal x5 = 0.30 * sin(angle);
- qreal y5 = 0.30 * cos(angle);
- qreal x6 = 0.20 * sin(angle);
- qreal y6 = 0.20 * cos(angle);
-
- angle += sectorAngle;
- qreal x7 = 0.20 * sin(angle);
- qreal y7 = 0.20 * cos(angle);
- qreal x8 = 0.30 * sin(angle);
- qreal y8 = 0.30 * cos(angle);
-
- quad(x5, y5, x6, y6, x7, y7, x8, y8);
-
- extrude(x6, y6, x7, y7);
- extrude(x8, y8, x5, y5);
- }
-
- for (int i = 0;i < vertices.size();i++)
- vertices[i] *= 2.0f;
-}
-
-void Renderer::quad(qreal x1, qreal y1, qreal x2, qreal y2, qreal x3, qreal y3, qreal x4, qreal y4)
-{
- vertices << QVector3D(x1, y1, -0.05f);
- vertices << QVector3D(x2, y2, -0.05f);
- vertices << QVector3D(x4, y4, -0.05f);
-
- vertices << QVector3D(x3, y3, -0.05f);
- vertices << QVector3D(x4, y4, -0.05f);
- vertices << QVector3D(x2, y2, -0.05f);
-
- QVector3D n = QVector3D::normal
- (QVector3D(x2 - x1, y2 - y1, 0.0f), QVector3D(x4 - x1, y4 - y1, 0.0f));
-
- normals << n;
- normals << n;
- normals << n;
-
- normals << n;
- normals << n;
- normals << n;
-
- vertices << QVector3D(x4, y4, 0.05f);
- vertices << QVector3D(x2, y2, 0.05f);
- vertices << QVector3D(x1, y1, 0.05f);
-
- vertices << QVector3D(x2, y2, 0.05f);
- vertices << QVector3D(x4, y4, 0.05f);
- vertices << QVector3D(x3, y3, 0.05f);
-
- n = QVector3D::normal
- (QVector3D(x2 - x4, y2 - y4, 0.0f), QVector3D(x1 - x4, y1 - y4, 0.0f));
-
- normals << n;
- normals << n;
- normals << n;
-
- normals << n;
- normals << n;
- normals << n;
-}
-
-void Renderer::extrude(qreal x1, qreal y1, qreal x2, qreal y2)
-{
- vertices << QVector3D(x1, y1, +0.05f);
- vertices << QVector3D(x2, y2, +0.05f);
- vertices << QVector3D(x1, y1, -0.05f);
-
- vertices << QVector3D(x2, y2, -0.05f);
- vertices << QVector3D(x1, y1, -0.05f);
- vertices << QVector3D(x2, y2, +0.05f);
-
- QVector3D n = QVector3D::normal
- (QVector3D(x2 - x1, y2 - y1, 0.0f), QVector3D(0.0f, 0.0f, -0.1f));
-
- normals << n;
- normals << n;
- normals << n;
-
- normals << n;
- normals << n;
- normals << n;
-}
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