Add additional colormaps

imagescrollarea.cpp

@@ -58,6 +58,11 @@ void ImageScrollArea::setBayerMask(int mask)
     m_imageWidget->setBayerMask(mask);
 }
 
+void ImageScrollArea::setColormap(int colormap)
+{
+    m_imageWidget->setColormap(colormap);
+}
+
 void ImageScrollArea::updateScrollbars(int valueH, int stepH, int maxH, int valueV, int stepV, int maxV)
 {
     if(maxH > 0)

imagescrollarea.h

@@ -16,6 +16,7 @@ public:
     void allocateThumbnails(const QStringList &paths);
     void showThumbnail(bool enable);
     void setBayerMask(int mask);
+    void setColormap(int colormap);
 protected:
     void updateScrollbars(int valueH, int stepH, int maxH, int valueV, int stepV, int maxV);
 public slots:

imagewidget.cpp

@@ -258,6 +258,12 @@ void ImageWidgetGL::setBayerMask(int mask)
     update();
 }
 
+void ImageWidgetGL::setColormap(int colormap)
+{
+    m_colormapIdx = colormap;
+    update();
+}
+
 void ImageWidgetGL::setMTFParams(const MTFParam &params)
 {
     m_mtfParams = params;
@@ -600,6 +606,7 @@ void ImageWidgetGL::paintGL()
             m_program->setUniformValue("filtering", m_scale > 1.0f ? FILTERING : 1);
             m_program->setUniformValue("lut_table", 2);
             m_program->setUniformValue("srgb", m_srgb);
+            m_program->setUniformValue("colormapIdx", m_colormapIdx);
             f->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
             m_vao->release();
         }
@@ -702,6 +709,7 @@ void ImageWidgetGL::initializeGL()
     m_program->setAttributeBuffer("qt_MultiTexCoord0", GL_FLOAT, sizeof(float)*2, 2, sizeof(float)*4);
     m_program->setUniformValue("qt_Texture0", (GLuint)0);
     m_program->setUniformValue("lut_table", (GLuint)2);
+    m_program->setUniformValue("colormap", (GLuint)3);
     m_program->setUniformValue("scale", 1.0f, 0.0f);
 
     m_debayerProgram = std::unique_ptr<QOpenGLShaderProgram>(new QOpenGLShaderProgram);
@@ -764,6 +772,21 @@ void ImageWidgetGL::initializeGL()
     m_lut->allocateStorage();
     m_lut->bind(2);
 
+    QImage colormap(":/colormap.png");
+    colormap = colormap.convertToFormat(QImage::Format_RGBA8888);
+    qDebug() << colormap;
+    m_colormap = std::make_unique<QOpenGLTexture>(QOpenGLTexture::Target1DArray);
+    m_colormap->setSize(colormap.width());
+    m_colormap->setLayers(colormap.height());
+    m_colormap->setFormat(QOpenGLTexture::RGBA8_UNorm);
+    m_colormap->setMinMagFilters(QOpenGLTexture::Linear, QOpenGLTexture::Linear);
+    m_colormap->setWrapMode(QOpenGLTexture::ClampToEdge);
+    m_colormap->allocateStorage();
+    for(int i=0; i<colormap.height(); i++)
+        m_colormap->setData(0, i, QOpenGLTexture::RGBA, QOpenGLTexture::UInt8, colormap.scanLine(i));
+
+    m_colormap->bind(3);
+
     if(m_rawImage)
         setImage(m_rawImage, m_currentImg);
 }

imagewidget.h

@@ -26,6 +26,7 @@ public:
     virtual void bestFit() = 0;
 
     virtual void setBayerMask(int mask) = 0;
+    virtual void setColormap(int colormap) = 0;
     virtual void setOffset(float dx, float dy) = 0;
     virtual void allocateThumbnails(const QStringList &paths) = 0;
 
@@ -63,6 +64,7 @@ class ImageWidgetGL : public QOpenGLWidget, public ImageWidget
     std::unique_ptr<QOpenGLVertexArrayObject> m_vaoThumb;
     std::unique_ptr<QOpenGLTexture> m_thumbnailTexture;
     std::unique_ptr<QOpenGLTexture> m_lut;
+    std::unique_ptr<QOpenGLTexture> m_colormap;
     GLuint m_debayerTex = 0;
     std::shared_ptr<RawImage> m_rawImage;
     std::shared_ptr<WCSDataT> m_wcs;
@@ -87,6 +89,7 @@ class ImageWidgetGL : public QOpenGLWidget, public ImageWidget
     int m_maxTextureSize = 0;
     int m_maxArrayLayers = 0;
     int m_firstRed[2] = {0, 0};
+    int m_colormapIdx = 0;
     QVector<ImageThumb> m_thumnails;
     Database *m_database = nullptr;
     QPointF m_lastPos;
@@ -102,6 +105,7 @@ public:
     void allocateThumbnails(const QStringList &paths) override;
     QVector2D getImagePixelCoord(const QVector2D &pos);
     void setBayerMask(int mask) override;
+    void setColormap(int colormap) override;
     void setOffset(float dx, float dy) override;
     void setMTFParams(const MTFParam &params) override;
     void superPixel(bool enable) override;

mainwindow.cpp

@@ -207,6 +207,29 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
         settings.setValue("mainwindow/bayermask", data);
     });
 
+    QStringList colormaps = {"Autumn", "Bone", "Jet", "Winter", "Rainbow", "Ocean", "Summer", "Spring", "Cool", "HSV", "Pink", "Hot", "Parula", "Magma",
+    "Inferno", "Plasma", "Viridis", "Cividis", "Twilight", "Twilight shifted", "Turbo", "Deepgreen"};
+    QMenu *colormapMenu = viewMenu->addMenu(tr("Colormap"));
+    QActionGroup *colormapActionGroup = new QActionGroup(this);
+    int idx = 0;
+    QImage cmImg(":/colormap.png");
+    for(QString &colormap : colormaps)
+    {
+        QImage icon = cmImg.copy(0, idx, cmImg.width(), 1).scaled(32, 32);
+        QAction *action = colormapActionGroup->addAction(colormap);
+        action->setIcon(QPixmap::fromImage(icon));
+        action->setCheckable(true); action->setData(idx++);
+        colormapMenu->addAction(action);
+    }
+    viewMenu->addMenu(colormapMenu);
+    connect(colormapActionGroup, &QActionGroup::triggered, [this](QAction *action){
+        int data = action->data().toInt();
+        m_image->setColormap(data);
+        QSettings settings;
+        settings.setValue("mainwindow/colormap", data);
+    });
+
+
     QAction *thumbnailsAction = viewMenu->addAction(tr("Thumbnails"), Qt::Key_F2, [this](bool checked){
         if(SettingsDialog::loadThumbsizes())m_ringList->clearThumbnails();
         m_image->allocateThumbnails(m_ringList->imageNames());
@@ -291,6 +314,12 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
     case 3:
         bggrAction->setChecked(true); break;
     }
+    int colormap = settings.value("mainwindow/colormap", 4).toInt();
+    if(colormap >= 0 && colormap < colormapActionGroup->actions().size())
+        colormapActionGroup->actions().at(colormap)->setChecked(true);
+
+    m_image->setBayerMask(bayermask);
+    m_image->setColormap(colormap);
 
     QStringList standardLocations = QStandardPaths::standardLocations(QStandardPaths::PicturesLocation);
     if(standardLocations.size())

resources/resources.qrc

@@ -18,6 +18,7 @@
         <file>space.nouspiro.tenmon.png</file>
         <file>../translations/tenmon_pt_BR.qm</file>
         <file alias="help">../about/help_en</file>
+        <file>colormap.png</file>
     </qresource>
     <qresource prefix="/" lang="en">
         <file alias="help">../about/help_en</file>

shaders/image.frag

@@ -1,5 +1,6 @@
 uniform sampler2D qt_Texture0;
 uniform sampler3D lut_table;
+uniform sampler1DArray colormap;
 uniform vec3 mtf_param[3];
 uniform vec2 unit_scale;
 uniform bool bw;
@@ -7,6 +8,7 @@ uniform bool invert;
 uniform bool srgb;
 uniform bool false_color;
 uniform int filtering;
+uniform int colormapIdx;
 in vec2 qt_TexCoord0;
 layout(location = 0) out vec4 color;
 
@@ -26,17 +28,9 @@ vec4 MTF(vec4 x, vec4 low, vec4 mid, vec4 high)
 
 vec3 falsecolor(float color)
 {
-    const vec3 pallete[] = vec3[](
-            vec3(1.0, 0.0, 1.0), //magneta
-            vec3(0.0, 0.0, 1.0), //blue
-            vec3(0.0, 1.0, 1.0), //cyan
-            vec3(0.0, 1.0, 0.0), //green
-            vec3(1.0, 1.0, 0.0), //yellow
-            vec3(1.0, 0.0, 0.0), vec3(1.0, 0.0, 0.0));//red
-    color *= 5.0;
-    int i = int(color);
-    float f = fract(color);
-    return mix(pallete[i], pallete[i+1], f);// * (f * 0.5 + 0.5);
+    color *= 255.0 / 256.0;
+    color += 0.5 / 256.0;
+    return texture(colormap, vec2(color, colormapIdx)).rgb;
 }
 
 vec3 checker()