Add q_color_modulate for modulating the color of QIcons

scwx-qt/scwx-qt.cmake

@@ -357,6 +357,7 @@ set(HDR_UTIL source/scwx/qt/util/color.hpp
              source/scwx/qt/util/network.hpp
              source/scwx/qt/util/streams.hpp
              source/scwx/qt/util/texture_atlas.hpp
+             source/scwx/qt/util/q_color_modulate.hpp
              source/scwx/qt/util/q_file_buffer.hpp
              source/scwx/qt/util/q_file_input_stream.hpp
              source/scwx/qt/util/time.hpp
@@ -369,6 +370,7 @@ set(SRC_UTIL source/scwx/qt/util/color.cpp
              source/scwx/qt/util/maplibre.cpp
              source/scwx/qt/util/network.cpp
              source/scwx/qt/util/texture_atlas.cpp
+             source/scwx/qt/util/q_color_modulate.cpp
              source/scwx/qt/util/q_file_buffer.cpp
              source/scwx/qt/util/q_file_input_stream.cpp
              source/scwx/qt/util/time.cpp

scwx-qt/source/scwx/qt/util/q_color_modulate.cpp

@@ -0,0 +1,56 @@
+#include <scwx/qt/util/q_color_modulate.hpp>
+
+#include <QColor>
+#include <QImage>
+#include <QIcon>
+#include <QPixmap>
+#include <QSize>
+
+namespace scwx
+{
+namespace qt
+{
+namespace util
+{
+
+void modulateColors_(QImage& image, const QColor& color)
+{
+   for (int y = 0; y < image.height(); ++y)
+   {
+      QRgb* line = reinterpret_cast<QRgb*>(image.scanLine(y));
+      for (int x = 0; x < image.width(); ++x)
+      {
+         QRgb& rgb   = line[x];
+         int   red   = qRed(rgb) * color.redF();
+         int   green = qGreen(rgb) * color.greenF();
+         int   blue  = qBlue(rgb) * color.blueF();
+         int   alpha = qAlpha(rgb) * color.alphaF();
+
+         rgb = qRgba(red, green, blue, alpha);
+      }
+   }
+}
+
+QImage modulateColors(const QImage& image, const QColor& color)
+{
+   QImage copy = image.copy();
+   modulateColors_(copy, color);
+   return copy;
+}
+
+QPixmap modulateColors(const QPixmap& pixmap, const QColor& color)
+{
+   QImage image = pixmap.toImage();
+   modulateColors_(image, color);
+   return QPixmap::fromImage(image);
+}
+
+QIcon modulateColors(const QIcon& icon, const QSize& size, const QColor& color)
+{
+   QPixmap pixmap = modulateColors(icon.pixmap(size), color);
+   return QIcon(pixmap);
+}
+
+} // namespace util
+} // namespace qt
+} // namespace scwx

scwx-qt/source/scwx/qt/util/q_color_modulate.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <QColor>
+#include <QImage>
+#include <QIcon>
+#include <QPixmap>
+#include <QSize>
+
+namespace scwx
+{
+namespace qt
+{
+namespace util
+{
+
+QImage  modulateColors(const QImage& image, const QColor& color);
+QPixmap modulateColors(const QPixmap& pixmap, const QColor& color);
+QIcon modulateColors(const QIcon& icon, const QSize& size, const QColor& color);
+
+} // namespace util
+} // namespace qt
+} // namespace scwx