Back svg icons by cached renderer image.

core/src/main/java/com/github/weisj/darklaf/graphics/ImageUtil.java

@@ -29,6 +29,7 @@ import java.awt.image.BufferedImage;
 
 import javax.swing.*;
 
+import com.github.weisj.darklaf.icons.ImageSource;
 import com.github.weisj.darklaf.util.Scale;
 
 /**
@@ -45,8 +46,8 @@ public final class ImageUtil {
         int w = icon.getIconWidth();
         int h = icon.getIconHeight();
         GraphicsConfiguration gc = c.getGraphicsConfiguration();
-        double sx = gc != null ? Scale.getScaleX(gc) : Scale.SCALE_X;
-        double sy = gc != null ? Scale.getScaleY(gc) : Scale.SCALE_Y;
+        double sx = Scale.getScaleX(gc);
+        double sy = Scale.getScaleY(gc);
         double scaleX = sx * (((double) FRAME_ICON_SIZE) / w);
         double scaleY = sy * (((double) FRAME_ICON_SIZE) / h);
         return createScaledImage(icon, scaleX, scaleY);
@@ -56,13 +57,17 @@ public final class ImageUtil {
         if (icon == null) return null;
         int w = (int) (scalex * icon.getIconWidth());
         int h = (int) (scaley * icon.getIconHeight());
-        BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
+        if (icon instanceof ImageSource) {
+            return ((ImageSource) icon).createImage(w, h);
+        } else {
+            BufferedImage image = createCompatibleTranslucentImage(w, h);
             Graphics2D g = (Graphics2D) image.getGraphics();
             g.scale(scalex, scaley);
             icon.paintIcon(null, g, 0, 0);
             g.dispose();
             return image;
         }
+    }
 
     public static Image createDragImage(final Component c, final int lw, final Color borderColor) {
         return createDragImage(c, new Rectangle(0, 0, c.getWidth(), c.getHeight()), lw, borderColor);
@@ -130,10 +135,9 @@ public final class ImageUtil {
         BufferedImage image;
         boolean scale = scalex != 1.0 || scaley != 1.0;
         if (scale) {
-            image = new BufferedImage((int) (scalex * bounds.width), (int) (scaley * bounds.height),
-                                      BufferedImage.TYPE_INT_RGB);
+            image = createCompatibleImage((int) (scalex * bounds.width), (int) (scaley * bounds.height));
         } else {
-            image = new BufferedImage(bounds.width, bounds.height, BufferedImage.TYPE_INT_RGB);
+            image = createCompatibleImage(bounds.width, bounds.height);
         }
         final Graphics2D g2d = (Graphics2D) image.getGraphics();
         if (scale) {
@@ -150,6 +154,13 @@ public final class ImageUtil {
         return image;
     }
 
+    public static BufferedImage createCompatibleImage(final int width,
+                                                      final int height) {
+        return isHeadless() ? new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB)
+                : getGraphicsConfiguration().createCompatibleImage(width, height,
+                                                                   Transparency.OPAQUE);
+    }
+
     public static BufferedImage createCompatibleTranslucentImage(final int width,
                                                                  final int height) {
         return isHeadless() ? new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB)

core/src/main/java/com/github/weisj/darklaf/ui/list/DarkListCellRendererDelegate.java

@@ -28,8 +28,6 @@ import java.awt.*;
 
 import javax.swing.*;
 
-import org.jdesktop.swingx.renderer.DefaultListRenderer;
-
 import com.github.weisj.darklaf.delegate.ListCellRendererDelegate;
 import com.github.weisj.darklaf.ui.cell.CellUtil;
 import com.github.weisj.darklaf.util.PropertyUtil;
@@ -43,7 +41,7 @@ public class DarkListCellRendererDelegate extends ListCellRendererDelegate<Objec
     @Override
     public void setDelegate(final ListCellRenderer<Object> delegate) {
         if (delegate == null) {
-            super.setDelegate(new DefaultListRenderer());
+            super.setDelegate(new DefaultListCellRenderer());
         } else {
             super.setDelegate(delegate);
         }

property-loader/src/main/java/com/github/weisj/darklaf/icons/DarkSVGIcon.java

@@ -30,9 +30,8 @@ import java.net.URI;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Logger;
 
-import javax.swing.*;
-
 import com.github.weisj.darklaf.util.LogUtil;
+import com.github.weisj.darklaf.util.Scale;
 import com.kitfox.svg.app.beans.SVGIcon;
 
 /**
@@ -41,13 +40,16 @@ import com.kitfox.svg.app.beans.SVGIcon;
  * @author Jannis Weis
  * @since  2019
  */
-public class DarkSVGIcon implements DerivableIcon<DarkSVGIcon>, RotateIcon, Serializable {
+public class DarkSVGIcon implements DerivableIcon<DarkSVGIcon>, RotateIcon, Serializable, ImageSource {
 
     private static final Logger LOGGER = LogUtil.getLogger(DarkSVGIcon.class);
     private final Dimension size;
     private final SVGIcon icon;
-    private final URI uri;
+    protected final URI uri;
     private final AtomicBoolean loaded;
+    private double scaleX;
+    private double scaleY;
+    private Image image;
 
     /**
      * Method to fetch the SVG icon from a url.
@@ -83,16 +85,38 @@ public class DarkSVGIcon implements DerivableIcon<DarkSVGIcon>, RotateIcon, Seri
 
     @Override
     public void paintIcon(final Component c, final Graphics g, final int x, final int y) {
-        ensureLoaded();
         paintIcon(c, g, x, y, 0);
     }
 
-    private void ensureLoaded() {
+    protected boolean ensureLoaded() {
         if (!loaded.get()) {
             LOGGER.fine(() -> "Loading icon '" + uri.toASCIIString() + "'.");
             icon.setSvgURI(uri);
             loaded.set(true);
+            return true;
+        }
+        return false;
+    }
+
+    protected void updateCache(final boolean update, final Component c) {
+        GraphicsConfiguration gc = c != null ? c.getGraphicsConfiguration() : null;
+        double sx = Scale.getScaleX(gc);
+        double sy = Scale.getScaleY(gc);
+        if (!update && Scale.equalWithError(scaleX, sx) && Scale.equalWithError(scaleY, sy) && image != null) return;
+        scaleX = sx;
+        scaleY = sy;
+        image = createImage(Scale.scale(scaleX, scaleY, size));
+    }
+
+    @Override
+    public Image createImage(final Dimension size) {
+        ensureLoaded();
+        icon.setPreferredSize(size);
+        return icon.getImage();
     }
+
+    protected void ensureImageLoaded(final Component c) {
+        updateCache(ensureLoaded(), c);
     }
 
     protected SVGIcon createSVGIcon() {
@@ -102,14 +126,17 @@ public class DarkSVGIcon implements DerivableIcon<DarkSVGIcon>, RotateIcon, Seri
     @Override
     public void paintIcon(final Component c, final Graphics g, final int x, final int y,
                           final double rotation) {
-        ensureLoaded();
+        ensureImageLoaded(c);
         Graphics2D g2 = (Graphics2D) g;
         g2.translate(x, y);
+        double sx = size.width / (double) image.getWidth(null);
+        double sy = size.height / (double) image.getWidth(null);
+        g2.scale(sx, sy);
         if (rotation != 0) {
             g2.rotate(rotation, size.width / 2.0, size.height / 2.0);
         }
-        icon.setPreferredSize(size);
-        icon.paintIcon(c, g2, 0, 0);
+        g2.drawImage(image, 0, 0, null);
+        g2.scale(1 / sx, 1 / sy);
         g2.translate(-x, -y);
     }
 
@@ -124,7 +151,7 @@ public class DarkSVGIcon implements DerivableIcon<DarkSVGIcon>, RotateIcon, Seri
     }
 
     public SVGIcon getSVGIcon() {
-        ensureLoaded();
+        if (!loaded.get()) ensureLoaded();
         return icon;
     }
 }

property-loader/src/main/java/com/github/weisj/darklaf/icons/ImageSource.java

@@ -0,0 +1,36 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 Jannis Weis
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+package com.github.weisj.darklaf.icons;
+
+import java.awt.*;
+
+public interface ImageSource {
+
+    Image createImage(final Dimension size);
+
+    default Image createImage(final int width, final int height) {
+        return createImage(new Dimension(width, height));
+    }
+}

property-loader/src/main/java/com/github/weisj/darklaf/icons/ThemedSVGIcon.java

@@ -39,18 +39,21 @@ public class ThemedSVGIcon extends DarkSVGIcon {
         currentTheme = new Object();
     }
 
-    @Override
-    public void paintIcon(final Component c, final Graphics g, final int x, final int y, final double rotation) {
-        ensureTheme();
-        super.paintIcon(c, g, x, y, rotation);
+    protected boolean ensureLoaded() {
+        /*
+         * Use non-short-circuiting operand here to ensure the colors are actually patched.
+         */
+        return super.ensureLoaded() | ensureTheme();
     }
 
-    private void ensureTheme() {
+    protected boolean ensureTheme() {
         Object theme = IconLoader.getThemeStatus();
         if (currentTheme != theme) {
             patchColors();
             currentTheme = theme;
+            return true;
         }
+        return false;
     }
 
     protected void patchColors() {

utils/src/main/java/com/github/weisj/darklaf/util/Scale.java

@@ -31,6 +31,7 @@ public class Scale {
     public static final double SCALE;
     public static final double SCALE_X;
     public static final double SCALE_Y;
+    private static final double EPSILON = 0.0001;
 
     static {
         DisplayMode mode = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDisplayMode();
@@ -41,11 +42,13 @@ public class Scale {
     }
 
     public static double scaleWidth(final double value, final GraphicsConfiguration gc) {
+        if (gc == null) return scaleWidth(value);
         AffineTransform transform = gc.getDefaultTransform();
         return transform.getScaleX() * value;
     }
 
     public static double scaleHeight(final double value, final GraphicsConfiguration gc) {
+        if (gc == null) return scaleHeight(value);
         AffineTransform transform = gc.getDefaultTransform();
         return transform.getScaleY() * value;
     }
@@ -83,10 +86,28 @@ public class Scale {
     }
 
     public static double getScaleX(final GraphicsConfiguration gc) {
+        if (gc == null) return SCALE_X;
         return gc.getDefaultTransform().getScaleX();
     }
 
     public static double getScaleY(final GraphicsConfiguration gc) {
+        if (gc == null) return SCALE_Y;
         return gc.getDefaultTransform().getScaleY();
     }
+
+    public static Dimension scale(final GraphicsConfiguration gc, final Dimension size) {
+        return new Dimension((int) scaleWidth(size.width, gc), (int) scaleHeight(size.height, gc));
+    }
+
+    public static double scale(final double scale, final double value) {
+        return scale * value;
+    }
+
+    public static Dimension scale(final double scaleX, final double scaleY, final Dimension size) {
+        return new Dimension((int) scale(scaleX, size.width), (int) scale(scaleY, size.height));
+    }
+
+    public static boolean equalWithError(final double a, final double b) {
+        return Math.abs(a - b) < EPSILON;
+    }
 }