131 lines
4.1 KiB
C++
131 lines
4.1 KiB
C++
#include "imagescrollareagl.h"
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#include <QOpenGLFunctions>
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#include <QDebug>
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#include <QKeyEvent>
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#include <QOpenGLDebugLogger>
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ImageScrollAreaGL::ImageScrollAreaGL(QWidget *parent) : QOpenGLWidget(parent)
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{
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setFocusPolicy(Qt::ClickFocus);
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m_range = UINT16_MAX;
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m_low = 0;
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m_high = 1;
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}
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ImageScrollAreaGL::~ImageScrollAreaGL()
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{
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makeCurrent();
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}
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void ImageScrollAreaGL::setImage(RawImageAbs *image)
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{
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m_image->destroy();
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m_image->setFormat(QOpenGLTexture::R16_UNorm);
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m_image->setSize(image->width(), image->height());
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m_image->setMinMagFilters(QOpenGLTexture::LinearMipMapLinear, QOpenGLTexture::Linear);
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m_image->allocateStorage();
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if(RawImage<uint8_t> *i8 = dynamic_cast<RawImage<uint8_t>*>(image))
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{
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m_image->setData(QOpenGLTexture::Red, QOpenGLTexture::UInt8, i8->data());
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m_range = UINT8_MAX;
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}
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else if(RawImage<uint16_t> *i16 = dynamic_cast<RawImage<uint16_t>*>(image))
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{
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m_image->setData(QOpenGLTexture::Red, QOpenGLTexture::UInt16, i16->data());
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m_range = UINT16_MAX;
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}
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else if(RawImage<uint32_t> *i32 = dynamic_cast<RawImage<uint32_t>*>(image))
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{
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m_image->setData(QOpenGLTexture::Red, QOpenGLTexture::UInt32, i32->data());
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m_range = UINT32_MAX;
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}
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m_image->generateMipMaps();
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repaint();
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}
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void ImageScrollAreaGL::setLow(int low)
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{
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m_low = low/m_range;
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repaint();
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}
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void ImageScrollAreaGL::setHigh(int high)
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{
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m_high = high/m_range;
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repaint();
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}
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void ImageScrollAreaGL::paintGL()
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{
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float s = 1.0f/(m_high-m_low);
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m_program->bind();
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m_program->setUniformValue("scale", s, -m_low*s);
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m_image->bind(0);
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f->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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}
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void ImageScrollAreaGL::resizeGL(int w, int h)
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{
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m_width = w;
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m_height = h;
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f->glViewport(0, 0, w, h);
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}
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void ImageScrollAreaGL::initializeGL()
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{
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f = context()->functions();
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f->glClearColor(0.5f, 0.5f, 0.5f, 1.0f);
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m_vao = std::unique_ptr<QOpenGLVertexArrayObject>(new QOpenGLVertexArrayObject);
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m_vao->create();
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m_vao->bind();
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QOpenGLDebugLogger *logger = new QOpenGLDebugLogger(this);
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logger->initialize();
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logger->startLogging();
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connect(logger, &QOpenGLDebugLogger::messageLogged, [](const QOpenGLDebugMessage &message)
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{
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qDebug() << message;
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});
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qDebug() << (char*)f->glGetString(GL_VENDOR);
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qDebug() << (char*)f->glGetString(GL_RENDERER);
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qDebug() << (char*)f->glGetString(GL_VERSION);
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qDebug() << context()->format();
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// each vertex is x,y 2D position and s,t texture coordinates
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float vertexs[] = {-1.0f, -1.0f, 0.0f, 1.0f,
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1.0f, -1.0f, 1.0f, 1.0f,
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-1.0f, 1.0f, 0.0f, 0.0f,
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1.0f, 1.0f, 1.0f, 0.0f,};
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m_buffer = std::unique_ptr<QOpenGLBuffer>(new QOpenGLBuffer(QOpenGLBuffer::VertexBuffer));
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m_buffer->setUsagePattern(QOpenGLBuffer::StaticDraw);
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m_buffer->create();
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m_buffer->bind();
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m_buffer->allocate(vertexs, sizeof(vertexs));
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f->glVertexAttribPointer(0, 2, GL_FLOAT, false, sizeof(float)*4, 0);
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m_program = std::unique_ptr<QOpenGLShaderProgram>(new QOpenGLShaderProgram);
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m_program->addShaderFromSourceFile(QOpenGLShader::Vertex, ":/shaders/image.vert");
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m_program->addShaderFromSourceFile(QOpenGLShader::Fragment, ":/shaders/image.frag");
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if(!m_program->link())
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{
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qDebug() << "Link failed" << m_program->log();
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}
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m_program->bind();
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m_program->enableAttributeArray("qt_Vertex");
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m_program->setAttributeBuffer("qt_Vertex", GL_FLOAT, 0, 2, sizeof(float)*4);
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m_program->enableAttributeArray("qt_MultiTexCoord0");
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m_program->setAttributeBuffer("qt_MultiTexCoord0", GL_FLOAT, sizeof(float)*2, 2, sizeof(float)*4);
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m_program->setUniformValue("qt_Texture0", (GLuint)0);
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m_program->setUniformValue("scale", 1.0f, 0.0f);
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m_image = std::unique_ptr<QOpenGLTexture>(new QOpenGLTexture(QImage("/home/nou/Obrázky/1p6yap.jpg")));
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m_image->bind(0);
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m_image->setMinificationFilter(QOpenGLTexture::LinearMipMapLinear);
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m_image->setMagnificationFilter(QOpenGLTexture::Linear);
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}
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