666 lines
21 KiB
C++
666 lines
21 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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#include <QOpenGLPixelTransferOptions>
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#include <QOpenGLFramebufferObject>
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#include <QGridLayout>
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#include <QMimeData>
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#include <QMessageBox>
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#include <QCoreApplication>
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#include <QPainter>
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#include <QFileInfo>
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struct RawImageType
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{
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QOpenGLTexture::PixelFormat pixelFormat;
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QOpenGLTexture::TextureFormat textureFormat;
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QOpenGLTexture::PixelType dataType;
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bool bw;
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};
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const RawImageType rawImageTypes[] = {
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{QOpenGLTexture::Red, QOpenGLTexture::R8_UNorm, QOpenGLTexture::UInt8, true},
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{QOpenGLTexture::Red, QOpenGLTexture::R16_UNorm, QOpenGLTexture::UInt16, true},
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{QOpenGLTexture::Red, QOpenGLTexture::R32F, QOpenGLTexture::Float32, true},
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{QOpenGLTexture::RGB, QOpenGLTexture::RGB8_UNorm, QOpenGLTexture::UInt8, false},
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{QOpenGLTexture::BGRA,QOpenGLTexture::RGB8_UNorm, QOpenGLTexture::UInt8, false},
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{QOpenGLTexture::RGB, QOpenGLTexture::RGB16_UNorm, QOpenGLTexture::UInt16, false},
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{QOpenGLTexture::RGB, QOpenGLTexture::RGB32F, QOpenGLTexture::Float32, false}
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};
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void setScrollRange(QScrollBar *scrollBar, int newRange)
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{
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int page = scrollBar->pageStep();
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int pos = scrollBar->value() + page/2;
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int range = scrollBar->maximum() + page;
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float relPos = (float)pos/(float)range;
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if(page >= newRange)
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scrollBar->hide();
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else
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scrollBar->show();
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scrollBar->setRange(0, newRange - page);
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scrollBar->setValue(relPos*newRange - page/2);
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}
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ImageWidget::ImageWidget(Database *database, QWidget *parent) : QOpenGLWidget(parent)
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, m_database(database)
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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_mid = 0.5;
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m_high = 1;
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m_dx = m_dy = 0;
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m_scale = 1.0f;
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m_blockRepaint = false;
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m_range = UINT16_MAX;
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m_imgWidth = m_imgHeight = -1;
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m_superpixel = m_invert = false;
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m_showThumbnails = false;
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m_selecting = false;
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m_thumbnailCount = 0;
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m_updateTimer = new QTimer(this);
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m_updateTimer->setInterval(500);
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m_updateTimer->setSingleShot(true);
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connect(m_updateTimer, SIGNAL(timeout()), this, SLOT(update()));
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setAcceptDrops(true);
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QTimer::singleShot(1000, [this](){
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if(!isValid())
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{
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QMessageBox::critical(this, tr("OpenGL error"), tr("Could not initialize OpenGL 3.3 context. Ensure that proper GPU driver is installed."));
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QCoreApplication::exit(-1);
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}
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});
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}
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ImageWidget::~ImageWidget()
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{
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makeCurrent();
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}
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void ImageWidget::setImage(const RawImage *image, int index)
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{
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if(image == nullptr)return;
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m_imgWidth = image->width();
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m_imgHeight = image->height();
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m_currentImg = index;
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const RawImageType &rawImageType = rawImageTypes[image->type()];
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m_image->destroy();
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m_image->setFormat(rawImageType.textureFormat);
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m_image->setSize(image->width(), image->height());
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m_image->setMipLevels([&](){ int c = 0; int s = std::min(m_imgWidth, m_imgHeight); while(s>>=1)c++; return c; }());
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m_image->allocateStorage();
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m_image->setMinMagFilters(QOpenGLTexture::LinearMipMapLinear, QOpenGLTexture::Linear);
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m_image->setWrapMode(QOpenGLTexture::ClampToEdge);
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m_image->setBorderColor(0, 0, 0, 0);
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m_image->setData(0, rawImageType.pixelFormat, rawImageType.dataType, image->data(), m_transferOptions.get());
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m_image->setLevelOfDetailRange(m_superpixel ? 1 : 0, m_image->mipMaxLevel());
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m_image->generateMipMaps();
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m_bwImg = rawImageType.bw;
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update();
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}
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void ImageWidget::setScale(float scale)
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{
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m_scale = scale;
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update();
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}
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void ImageWidget::blockRepaint(bool block)
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{
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m_blockRepaint = block;
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if(!block)update();
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}
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void ImageWidget::allocateThumbnails(const QStringList &paths)
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{
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int count = paths.size();
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m_thumbnailCount = count;
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m_thumnails.clear();
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QStringList marked = m_database->getMarkedFiles();
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for(auto &path : paths)
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{
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QString name = QFileInfo(path).fileName();
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m_thumnails.push_back({name, path, QSize(0, 0), marked.contains(path), false});
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}
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m_thumbnailTexture->destroy();
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m_thumbnailTexture->create();
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m_thumbnailTexture->setFormat(QOpenGLTexture::RGB16_UNorm);
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m_thumbnailTexture->setSize(THUMB_SIZE, THUMB_SIZE);
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m_thumbnailTexture->setLayers(paths.size());
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m_thumbnailTexture->allocateStorage();
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m_bufferSizes->bind();
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float *tmp = new float[count*3];
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memset(tmp, 0, count * sizeof(float)*3);
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m_bufferSizes->allocate(tmp, count * sizeof(float)*3);
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delete [] tmp;
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}
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void ImageWidget::setMTFParams(float low, float mid, float high)
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{
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m_low = low;
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m_mid = mid;
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m_high = high;
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update();
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}
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void ImageWidget::setOffset(int dx, int dy)
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{
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m_dx = dx;
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m_dy = dy;
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update();
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}
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void ImageWidget::superPixel(bool enable)
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{
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m_superpixel = enable;
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m_image->setLevelOfDetailRange(enable ? 1 : 0, m_image->mipMaxLevel());
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update();
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}
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void ImageWidget::invert(bool enable)
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{
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m_invert = enable;
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update();
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}
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QImage ImageWidget::renderToImage()
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{
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if(m_imgWidth < 0)return QImage();
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makeCurrent();
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QOpenGLFramebufferObject fbo(m_imgWidth, m_imgHeight);
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fbo.bind();
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f->glViewport(0, 0, m_imgWidth, m_imgHeight);
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m_program->bind();
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m_program->setUniformValue("viewport", (float)m_imgWidth, (float)m_imgHeight);
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m_program->setUniformValue("offset", 0.0f, 0.0f);
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m_program->setUniformValue("zoom", 1.0f);
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m_image->bind(0);
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f->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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fbo.bindDefault();
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return fbo.toImage(true);
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}
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void ImageWidget::thumbnailLoaded(const Image *image)
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{
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const RawImage *raw = image->thumbnail();
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m_thumbnailTexture->setData(0, image->number(), QOpenGLTexture::RGB, QOpenGLTexture::UInt16, raw->data(), m_transferOptions.get());
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float a = raw->thumbAspect();
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int sizes[3] = { std::max(1, a > 1.0f ? THUMB_SIZE : (int)(THUMB_SIZE * a)), std::max(1, a < 1.0f ? THUMB_SIZE : (int)(THUMB_SIZE / a)), image->number() };
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m_bufferSizes->bind();
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m_bufferSizes->write(image->number() * sizeof(sizes), sizes, sizeof(sizes));
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m_thumnails[image->number()].size = QSize(sizes[0], sizes[1]);
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if(!m_updateTimer->isActive())m_updateTimer->start();
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}
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void ImageWidget::showThumbnail(bool enable)
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{
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m_showThumbnails = enable;
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update();
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}
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void ImageWidget::paintGL()
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{
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if(m_blockRepaint)return;
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float dx = m_dx;
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float dy = m_dy;
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if(width() > m_image->width()*m_scale)
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dx = -width()*0.5f + m_image->width()*m_scale*0.5f;
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if(height() > m_image->height()*m_scale)
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dy = -height()*0.5f + m_image->height()*m_scale*0.5f;
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QBrush highlight = style()->standardPalette().highlight();
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if(m_showThumbnails)
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{
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m_vaoThumb->bind();
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m_thumbnailTexture->bind(1);
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m_thumbnailProgram->bind();
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f->glUniform3i(m_thumbnailProgram->uniformLocation("viewport_row"), width(), height(), width()/THUMB_SIZE_BORDER);
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m_thumbnailProgram->setUniformValue("mtf_param", m_low, m_mid, m_high);
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m_thumbnailProgram->setUniformValue("invert", m_invert);
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m_thumbnailProgram->setUniformValue("offset", 0, m_dy);
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f3->glVertexAttribDivisor(m_thumbnailProgram->attributeLocation("imageSize_num"), 1);
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QMatrix4x4 mvp;
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mvp.ortho(rect());
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m_thumbnailProgram->setUniformValue("mvp", mvp);
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if(f3)f3->glDrawArraysInstanced(GL_TRIANGLE_STRIP, 0, 4, m_thumbnailCount);
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QPainter painter(this);
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const int w = width()/THUMB_SIZE_BORDER;
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const int off = (THUMB_SIZE_BORDER - THUMB_SIZE) / 2;
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for(int i=0; i < m_thumbnailCount; i++)
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{
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float x = (i % w) * THUMB_SIZE_BORDER;
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float y = i / w * THUMB_SIZE_BORDER_Y + THUMB_SIZE - m_dy + off;
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QRectF rect(x, y, THUMB_SIZE_BORDER, 32);
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painter.drawText(rect, Qt::AlignCenter | Qt::TextWrapAnywhere, QString(m_thumnails[i].name));
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if(m_thumnails[i].selected)
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{
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painter.save();
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QRectF thumbRect;
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painter.setPen(Qt::red);
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thumbRect.setSize(m_thumnails[i].size);
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thumbRect.moveCenter(QPointF(x + THUMB_SIZE_BORDER / 2, y - THUMB_SIZE / 2));
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painter.drawRect(thumbRect);
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painter.restore();
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}
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if(m_currentImg == i)
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{
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painter.save();
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painter.setPen(QPen(highlight, 2.0));
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painter.drawRect((i % w) * THUMB_SIZE_BORDER + off, i / w * THUMB_SIZE_BORDER_Y - m_dy + off, THUMB_SIZE, THUMB_SIZE);
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painter.restore();
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}
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}
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}
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else
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{
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m_vao->bind();
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m_image->bind(0);
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m_program->bind();
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m_program->setUniformValue("viewport", (float)width(), (float)height());
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m_program->setUniformValue("offset", dx, dy);
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m_program->setUniformValue("mtf_param", m_low, m_mid, m_high);
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m_program->setUniformValue("zoom", 1.0f/m_scale);
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m_program->setUniformValue("bw", m_bwImg);
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m_program->setUniformValue("invert", m_invert);
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f->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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}
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}
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void ImageWidget::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 ImageWidget::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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f3 = context()->versionFunctions<QOpenGLFunctions_3_3_Core>();
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if(f3 == nullptr)
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QMessageBox::critical(this, tr("OpenGL error"), tr("Could not initialize OpenGL 3.3 context. Ensure that proper GPU driver is installed."));
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m_vao = std::unique_ptr<QOpenGLVertexArrayObject>(new QOpenGLVertexArrayObject);
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m_vaoThumb = std::unique_ptr<QOpenGLVertexArrayObject>(new QOpenGLVertexArrayObject);
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m_vao->create();
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m_vaoThumb->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(f3)f3->glBindFragDataLocation(m_program->programId(), 0, "color");
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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_vaoThumb->bind();
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m_thumbnailProgram = std::unique_ptr<QOpenGLShaderProgram>(new QOpenGLShaderProgram);
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m_thumbnailProgram->addShaderFromSourceFile(QOpenGLShader::Vertex, ":/shaders/thumb.vert");
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m_thumbnailProgram->addShaderFromSourceFile(QOpenGLShader::Fragment, ":/shaders/thumb.frag");
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if(f3)f3->glBindFragDataLocation(m_program->programId(), 0, "color");
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m_thumbnailProgram->bind();
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m_thumbnailProgram->enableAttributeArray("qt_Vertex");
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m_thumbnailProgram->setAttributeBuffer("qt_Vertex", GL_FLOAT, 0, 2, sizeof(float)*4);
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m_thumbnailProgram->enableAttributeArray("qt_MultiTexCoord0");
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m_thumbnailProgram->setAttributeBuffer("qt_MultiTexCoord0", GL_FLOAT, sizeof(float)*2, 2, sizeof(float)*4);
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if(!m_thumbnailProgram->link())
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{
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qDebug() << "Link failed" << m_thumbnailProgram->log();
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}
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m_thumbnailProgram->setUniformValue("qt_Texture0", (GLuint)1);
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m_bufferSizes = std::unique_ptr<QOpenGLBuffer>(new QOpenGLBuffer(QOpenGLBuffer::VertexBuffer));
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m_bufferSizes->setUsagePattern(QOpenGLBuffer::StaticDraw);
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m_bufferSizes->create();
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m_bufferSizes->bind();
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m_bufferSizes->allocate(12);
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m_thumbnailProgram->enableAttributeArray("imageSize_num");
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m_thumbnailProgram->setAttributeBuffer("imageSize_num", GL_FLOAT, 0, 3);
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f3->glVertexAttribDivisor(m_thumbnailProgram->attributeLocation("imageSize_num"), 1);
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m_image = std::unique_ptr<QOpenGLTexture>(new QOpenGLTexture(QOpenGLTexture::Target2D));
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m_image->setFormat(QOpenGLTexture::RGB8U);
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m_image->allocateStorage();
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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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m_thumbnailTexture = std::unique_ptr<QOpenGLTexture>(new QOpenGLTexture(QOpenGLTexture::Target2DArray));
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m_thumbnailTexture->setFormat(QOpenGLTexture::RGB16_UNorm);
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m_thumbnailTexture->setSize(THUMB_SIZE, THUMB_SIZE);
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m_thumbnailTexture->setLayers(1);
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m_thumbnailTexture->allocateStorage();
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m_thumbnailTexture->bind(1);
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m_thumbnailTexture->setMinificationFilter(QOpenGLTexture::Linear);
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m_thumbnailTexture->setMinificationFilter(QOpenGLTexture::Linear);
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m_transferOptions = std::unique_ptr<QOpenGLPixelTransferOptions>(new QOpenGLPixelTransferOptions);
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m_transferOptions->setAlignment(1);
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}
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void ImageWidget::dragEnterEvent(QDragEnterEvent *event)
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{
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if(event->mimeData()->hasUrls() && event->proposedAction() & (Qt::CopyAction | Qt::MoveAction))
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event->acceptProposedAction();
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}
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void ImageWidget::dropEvent(QDropEvent *event)
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{
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if(event->mimeData()->hasUrls() && event->proposedAction() & (Qt::CopyAction | Qt::MoveAction))
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{
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for(const QUrl &url : event->mimeData()->urls())
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{
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if(url.isLocalFile())
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{
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emit fileDropped(url.toLocalFile());
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event->accept();
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return;
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}
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}
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}
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event->ignore();
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}
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void ImageWidget::mousePressEvent(QMouseEvent *event)
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{
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if(m_thumbnailCount && event->button() == Qt::LeftButton && event->modifiers() & (Qt::ShiftModifier | Qt::ControlModifier))
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m_selecting = true;
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if(m_selecting)
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{
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thumbSelect(event);
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}
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else
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event->ignore();
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}
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void ImageWidget::mouseMoveEvent(QMouseEvent *event)
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{
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if(m_selecting)
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{
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thumbSelect(event);
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}
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else
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event->ignore();
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}
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void ImageWidget::mouseReleaseEvent(QMouseEvent *event)
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{
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if(m_selecting)
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{
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m_selecting = false;
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event->accept();
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QStringList mark;
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QStringList unmark;
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for(auto &thumb : m_thumnails)
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{
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if(thumb.dirty)
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{
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if(thumb.selected)
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mark.append(thumb.path);
|
|
else
|
|
unmark.append(thumb.path);
|
|
|
|
thumb.dirty = false;
|
|
}
|
|
}
|
|
if(!mark.isEmpty())
|
|
m_database->mark(mark);
|
|
if(!unmark.isEmpty())
|
|
m_database->unmark(unmark);
|
|
}
|
|
else
|
|
event->ignore();
|
|
}
|
|
|
|
void ImageWidget::thumbSelect(QMouseEvent *event)
|
|
{
|
|
QPoint p = event->pos();
|
|
const int off = (THUMB_SIZE_BORDER - THUMB_SIZE) / 2;
|
|
p.ry() += m_dy;
|
|
const int w = width()/THUMB_SIZE_BORDER;
|
|
int x = p.x() / THUMB_SIZE_BORDER;
|
|
int y = p.y() / THUMB_SIZE_BORDER_Y;
|
|
int i = y * w + x;
|
|
event->accept();
|
|
QRect rect(x * THUMB_SIZE_BORDER + off, y * THUMB_SIZE_BORDER_Y + off, THUMB_SIZE, THUMB_SIZE);
|
|
if(x < w && i < m_thumbnailCount && rect.contains(p, true))
|
|
{
|
|
bool oldVal = m_thumnails[i].selected;
|
|
bool newVal = oldVal;
|
|
if(event->modifiers() == Qt::ShiftModifier)
|
|
newVal = true;
|
|
if(event->modifiers() == Qt::ControlModifier)
|
|
newVal = false;
|
|
|
|
if(newVal != oldVal)
|
|
{
|
|
m_thumnails[i].selected = newVal;
|
|
m_thumnails[i].dirty = true;
|
|
update();
|
|
}
|
|
}
|
|
}
|
|
|
|
ImageScrollAreaGL::ImageScrollAreaGL(Database *database, QWidget *parent) : QWidget(parent)
|
|
{
|
|
QGridLayout *layout = new QGridLayout(this);
|
|
setLayout(layout);
|
|
|
|
m_imageWidget = new ImageWidget(database, this);
|
|
|
|
m_verticalScrollBar = new QScrollBar(Qt::Vertical, this);
|
|
m_horizontalScrollBar = new QScrollBar(Qt::Horizontal, this);
|
|
m_scale = 1.0f;
|
|
m_bestFit = false;
|
|
m_thumbCount = 0;
|
|
|
|
layout->setSpacing(0);
|
|
layout->addWidget(m_imageWidget, 0, 0);
|
|
layout->addWidget(m_verticalScrollBar, 0, 1);
|
|
layout->addWidget(m_horizontalScrollBar, 1, 0);
|
|
|
|
connect(m_verticalScrollBar, SIGNAL(valueChanged(int)), this, SLOT(scrollEvent()));
|
|
connect(m_horizontalScrollBar, SIGNAL(valueChanged(int)), this, SLOT(scrollEvent()));
|
|
}
|
|
|
|
ImageScrollAreaGL::~ImageScrollAreaGL()
|
|
{
|
|
|
|
}
|
|
|
|
void ImageScrollAreaGL::setImage(RawImage *image, int index)
|
|
{
|
|
m_imageWidget->setImage(image, index);
|
|
m_imgWidth = image->width();
|
|
m_imgHeight = image->height();
|
|
if(m_bestFit)bestFit();
|
|
updateScrollbars();
|
|
}
|
|
|
|
ImageWidget *ImageScrollAreaGL::imageWidget()
|
|
{
|
|
return m_imageWidget;
|
|
}
|
|
|
|
void ImageScrollAreaGL::setThumbnails(int count)
|
|
{
|
|
m_thumbCount = count;
|
|
if(m_thumbCount)
|
|
{
|
|
m_verticalScrollBar->setRange(0, m_thumbCount / (m_imageWidget->width() / THUMB_SIZE_BORDER) * THUMB_SIZE_BORDER_Y);
|
|
m_verticalScrollBar->setPageStep(THUMB_SIZE_BORDER_Y);
|
|
}
|
|
else
|
|
{
|
|
m_verticalScrollBar->setPageStep(m_imageWidget->height());
|
|
m_horizontalScrollBar->setPageStep(m_imageWidget->width());
|
|
}
|
|
updateScrollbars();
|
|
}
|
|
|
|
void ImageScrollAreaGL::updateScrollbars(bool zoom)
|
|
{
|
|
if(m_thumbCount)
|
|
{
|
|
m_horizontalScrollBar->hide();
|
|
m_verticalScrollBar->show();
|
|
m_verticalScrollBar->setRange(0, m_thumbCount / (m_imageWidget->width() / THUMB_SIZE_BORDER) * THUMB_SIZE_BORDER_Y);
|
|
m_verticalScrollBar->setPageStep(THUMB_SIZE_BORDER_Y);
|
|
}
|
|
else
|
|
{
|
|
if(zoom)
|
|
{
|
|
setScrollRange(m_verticalScrollBar, m_imgHeight*m_scale);
|
|
setScrollRange(m_horizontalScrollBar, m_imgWidth*m_scale);
|
|
}
|
|
else
|
|
{
|
|
m_verticalScrollBar->setRange(0, m_imgHeight*m_scale - m_verticalScrollBar->pageStep());
|
|
m_horizontalScrollBar->setRange(0, m_imgWidth*m_scale - m_horizontalScrollBar->pageStep());
|
|
}
|
|
}
|
|
}
|
|
|
|
void ImageScrollAreaGL::resizeEvent(QResizeEvent *event)
|
|
{
|
|
QWidget::resizeEvent(event);
|
|
if(m_thumbCount)
|
|
{
|
|
m_verticalScrollBar->setRange(0, m_thumbCount / (m_imageWidget->width() / THUMB_SIZE_BORDER) * THUMB_SIZE_BORDER_Y);
|
|
m_verticalScrollBar->setPageStep(THUMB_SIZE_BORDER_Y);
|
|
}
|
|
else
|
|
{
|
|
m_verticalScrollBar->setPageStep(m_imageWidget->height());
|
|
m_horizontalScrollBar->setPageStep(m_imageWidget->width());
|
|
}
|
|
updateScrollbars();
|
|
}
|
|
|
|
void ImageScrollAreaGL::mouseMoveEvent(QMouseEvent *event)
|
|
{
|
|
QPoint delta = m_lastPos - event->pos();
|
|
if(m_thumbCount == 0)m_horizontalScrollBar->setValue(m_horizontalScrollBar->value() + delta.x());
|
|
m_verticalScrollBar->setValue(m_verticalScrollBar->value() + delta.y());
|
|
m_lastPos = event->pos();
|
|
}
|
|
|
|
void ImageScrollAreaGL::mousePressEvent(QMouseEvent *event)
|
|
{
|
|
m_lastPos = event->pos();
|
|
}
|
|
|
|
void ImageScrollAreaGL::wheelEvent(QWheelEvent *event)
|
|
{
|
|
if(m_thumbCount)
|
|
{
|
|
m_verticalScrollBar->setValue(m_verticalScrollBar->value() - event->angleDelta().y());
|
|
}
|
|
else
|
|
{
|
|
m_bestFit = false;
|
|
if(event->angleDelta().y() != 0)
|
|
zoom(event->angleDelta().y() / 1200.0f);
|
|
}
|
|
}
|
|
|
|
void ImageScrollAreaGL::zoom(float delta)
|
|
{
|
|
if((m_scale >= 8.0f && delta > 0) || (m_scale <= 0.1f && delta < 0))return;
|
|
|
|
m_scale += delta;
|
|
m_imageWidget->blockRepaint(true);
|
|
m_imageWidget->setScale(m_scale);
|
|
updateScrollbars(true);
|
|
m_imageWidget->blockRepaint(false);
|
|
}
|
|
|
|
void ImageScrollAreaGL::zoomIn()
|
|
{
|
|
zoom(0.1f);
|
|
m_bestFit = false;
|
|
}
|
|
|
|
void ImageScrollAreaGL::zoomOut()
|
|
{
|
|
zoom(-0.1f);
|
|
m_bestFit = false;
|
|
}
|
|
|
|
void ImageScrollAreaGL::bestFit()
|
|
{
|
|
m_bestFit = true;
|
|
m_scale = std::min((float)m_imageWidget->width()/m_imgWidth, (float)m_imageWidget->height()/m_imgHeight);
|
|
zoom(0.0f);
|
|
}
|
|
|
|
void ImageScrollAreaGL::oneToOne()
|
|
{
|
|
m_scale = 1.0f;
|
|
zoom(0.0f);
|
|
m_bestFit = false;
|
|
}
|
|
|
|
void ImageScrollAreaGL::scrollEvent()
|
|
{
|
|
m_imageWidget->setOffset(m_horizontalScrollBar->value(), m_verticalScrollBar->value());
|
|
}
|