101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
#include "OpenGlViewer.h"
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#include "defines.h"
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#include "Vertex.h"
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#include <iostream>
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static const Vertex sg_vertexes[] = {
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Vertex(QVector3D(0.00f, 0.75f, 1.0f), QVector3D(1.0f, 0.0f, 0.0f)),
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Vertex(QVector3D(0.75f, -0.75f, 1.0f), QVector3D(0.0f, 1.0f, 0.0f)),
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Vertex(QVector3D(-0.75f, -0.75f, 1.0f), QVector3D(0.0f, 0.0f, 1.0f))
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};
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OpenGlViewer::OpenGlViewer(QWidget *parent)
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: QOpenGLWidget(parent)
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{
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QSurfaceFormat format;
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format.setRenderableType(QSurfaceFormat::OpenGL);
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format.setProfile(QSurfaceFormat::CompatibilityProfile);
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format.setVersion(DEFAULT_MAJOR_VERSION, DEFAULT_MINOR_VERSION);
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setFormat(format);
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}
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OpenGlViewer::~OpenGlViewer()
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{
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mVertexArray.destroy();
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mVertexBuffer.destroy();
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delete mProgram;
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}
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void OpenGlViewer::printContextInformation()
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{
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QString glType;
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QString glVersion;
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QString glProfile;
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glType = (context()->isOpenGLES()) ? "OpenGL ES" : "OpenGL";
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glVersion = reinterpret_cast<const char*>(glGetString(GL_VERSION));
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#define CASE(c) case QSurfaceFormat::c: glProfile = #c; break
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switch (format().profile())
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{
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CASE(NoProfile);
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CASE(CoreProfile);
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CASE(CompatibilityProfile);
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}
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#undef CASE
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std::cout << glType.toStdString() << " - " << glVersion.toStdString() << " (" << glProfile.toStdString() << ")";
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}
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void OpenGlViewer::initializeGL()
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{
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initializeOpenGLFunctions();
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printContextInformation();
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//glEnable(GL_DEPTH_TEST);
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glClearColor(DEAFAULT_BACKGROUND);
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mProgram = new QOpenGLShaderProgram();
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mProgram->addShaderFromSourceFile(QOpenGLShader::Vertex, ":/shaders/simple.vert");
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mProgram->addShaderFromSourceFile(QOpenGLShader::Fragment, ":/shaders/simple.frag");
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mProgram->link();
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mProgram->bind();
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mVertexBuffer.create();
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mVertexBuffer.bind();
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mVertexBuffer.setUsagePattern(QOpenGLBuffer::StaticDraw);
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mVertexBuffer.allocate(sg_vertexes, sizeof(sg_vertexes));
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mVertexArray.create();
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mVertexArray.bind();
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mProgram->enableAttributeArray(0);
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mProgram->enableAttributeArray(1);
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mProgram->setAttributeBuffer(0, GL_FLOAT, Vertex::positionOffset(), Vertex::PositionTupleSize, Vertex::stride());
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mProgram->setAttributeBuffer(1, GL_FLOAT, Vertex::colorOffset(), Vertex::ColorTupleSize, Vertex::stride());
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mVertexArray.release();
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mVertexBuffer.release();
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mProgram->release();
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}
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void OpenGlViewer::resizeGL(int w, int h)
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{
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//TODO: change perspective
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}
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void OpenGlViewer::paintGL()
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{
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//TODO: paint here
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glClear(GL_COLOR_BUFFER_BIT);
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mProgram->bind();
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mVertexArray.bind();
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glDrawArrays(GL_TRIANGLES, 0, sizeof(sg_vertexes) / sizeof(sg_vertexes[0]));
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mVertexArray.release();
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mProgram->release();
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}
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