Add BlendComposite.java

The class is adapted from a demo tool for Blending Modes written by
Romain Guy (romainguy@android.com). The tool is available at
http://www.curious-creature.org/2006/09/20/new-blendings-modes-for-java2d/

Change-Id: I8f7c7ca08d3078106056764a4e2f1ce95d990137

1 files changed, 772 insertions, 0 deletions

diff --git a/tools/layoutlib/bridge/src/android/graphics/BlendComposite.java b/tools/layoutlib/bridge/src/android/graphics/BlendComposite.java
new file mode 100644
index 0000000..a864f84
--- /dev/null
+++ b/tools/layoutlib/bridge/src/android/graphics/BlendComposite.java
@@ -0,0 +1,772 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.graphics;
+
+import java.awt.Composite;
+import java.awt.CompositeContext;
+import java.awt.RenderingHints;
+import java.awt.image.ColorModel;
+import java.awt.image.DataBuffer;
+import java.awt.image.Raster;
+import java.awt.image.WritableRaster;
+
+/*
+ * (non-Javadoc)
+ * The class is adapted from a demo tool for Blending Modes written by
+ * Romain Guy (romainguy@android.com). The tool is available at
+ * http://www.curious-creature.org/2006/09/20/new-blendings-modes-for-java2d/
+ */
+public final class BlendComposite implements Composite {
+    public enum BlendingMode {
+        NORMAL,
+        AVERAGE,
+        MULTIPLY,
+        SCREEN,
+        DARKEN,
+        LIGHTEN,
+        OVERLAY,
+        HARD_LIGHT,
+        SOFT_LIGHT,
+        DIFFERENCE,
+        NEGATION,
+        EXCLUSION,
+        COLOR_DODGE,
+        INVERSE_COLOR_DODGE,
+        SOFT_DODGE,
+        COLOR_BURN,
+        INVERSE_COLOR_BURN,
+        SOFT_BURN,
+        REFLECT,
+        GLOW,
+        FREEZE,
+        HEAT,
+        ADD,
+        SUBTRACT,
+        STAMP,
+        RED,
+        GREEN,
+        BLUE,
+        HUE,
+        SATURATION,
+        COLOR,
+        LUMINOSITY
+    }
+
+    public static final BlendComposite Normal = new BlendComposite(BlendingMode.NORMAL);
+    public static final BlendComposite Average = new BlendComposite(BlendingMode.AVERAGE);
+    public static final BlendComposite Multiply = new BlendComposite(BlendingMode.MULTIPLY);
+    public static final BlendComposite Screen = new BlendComposite(BlendingMode.SCREEN);
+    public static final BlendComposite Darken = new BlendComposite(BlendingMode.DARKEN);
+    public static final BlendComposite Lighten = new BlendComposite(BlendingMode.LIGHTEN);
+    public static final BlendComposite Overlay = new BlendComposite(BlendingMode.OVERLAY);
+    public static final BlendComposite HardLight = new BlendComposite(BlendingMode.HARD_LIGHT);
+    public static final BlendComposite SoftLight = new BlendComposite(BlendingMode.SOFT_LIGHT);
+    public static final BlendComposite Difference = new BlendComposite(BlendingMode.DIFFERENCE);
+    public static final BlendComposite Negation = new BlendComposite(BlendingMode.NEGATION);
+    public static final BlendComposite Exclusion = new BlendComposite(BlendingMode.EXCLUSION);
+    public static final BlendComposite ColorDodge = new BlendComposite(BlendingMode.COLOR_DODGE);
+    public static final BlendComposite InverseColorDodge = new BlendComposite(BlendingMode.INVERSE_COLOR_DODGE);
+    public static final BlendComposite SoftDodge = new BlendComposite(BlendingMode.SOFT_DODGE);
+    public static final BlendComposite ColorBurn = new BlendComposite(BlendingMode.COLOR_BURN);
+    public static final BlendComposite InverseColorBurn = new BlendComposite(BlendingMode.INVERSE_COLOR_BURN);
+    public static final BlendComposite SoftBurn = new BlendComposite(BlendingMode.SOFT_BURN);
+    public static final BlendComposite Reflect = new BlendComposite(BlendingMode.REFLECT);
+    public static final BlendComposite Glow = new BlendComposite(BlendingMode.GLOW);
+    public static final BlendComposite Freeze = new BlendComposite(BlendingMode.FREEZE);
+    public static final BlendComposite Heat = new BlendComposite(BlendingMode.HEAT);
+    public static final BlendComposite Add = new BlendComposite(BlendingMode.ADD);
+    public static final BlendComposite Subtract = new BlendComposite(BlendingMode.SUBTRACT);
+    public static final BlendComposite Stamp = new BlendComposite(BlendingMode.STAMP);
+    public static final BlendComposite Red = new BlendComposite(BlendingMode.RED);
+    public static final BlendComposite Green = new BlendComposite(BlendingMode.GREEN);
+    public static final BlendComposite Blue = new BlendComposite(BlendingMode.BLUE);
+    public static final BlendComposite Hue = new BlendComposite(BlendingMode.HUE);
+    public static final BlendComposite Saturation = new BlendComposite(BlendingMode.SATURATION);
+    public static final BlendComposite Color = new BlendComposite(BlendingMode.COLOR);
+    public static final BlendComposite Luminosity = new BlendComposite(BlendingMode.LUMINOSITY);
+
+    private float alpha;
+    private BlendingMode mode;
+
+    private BlendComposite(BlendingMode mode) {
+        this(mode, 1.0f);
+    }
+
+    private BlendComposite(BlendingMode mode, float alpha) {
+        this.mode = mode;
+        setAlpha(alpha);
+    }
+
+    public static BlendComposite getInstance(BlendingMode mode) {
+        return new BlendComposite(mode);
+    }
+
+    public static BlendComposite getInstance(BlendingMode mode, float alpha) {
+        return new BlendComposite(mode, alpha);
+    }
+
+    public BlendComposite derive(BlendingMode mode) {
+        return this.mode == mode ? this : new BlendComposite(mode, getAlpha());
+    }
+
+    public BlendComposite derive(float alpha) {
+        return this.alpha == alpha ? this : new BlendComposite(getMode(), alpha);
+    }
+
+    public float getAlpha() {
+        return alpha;
+    }
+
+    public BlendingMode getMode() {
+        return mode;
+    }
+
+    private void setAlpha(float alpha) {
+        if (alpha < 0.0f || alpha > 1.0f) {
+            throw new IllegalArgumentException(
+                    "alpha must be comprised between 0.0f and 1.0f");
+        }
+
+        this.alpha = alpha;
+    }
+
+    @Override
+    public int hashCode() {
+        return Float.floatToIntBits(alpha) * 31 + mode.ordinal();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (!(obj instanceof BlendComposite)) {
+            return false;
+        }
+
+        BlendComposite bc = (BlendComposite) obj;
+
+        if (mode != bc.mode) {
+            return false;
+        }
+
+        return alpha == bc.alpha;
+    }
+
+    public CompositeContext createContext(ColorModel srcColorModel,
+                                          ColorModel dstColorModel,
+                                          RenderingHints hints) {
+        return new BlendingContext(this);
+    }
+
+    private static final class BlendingContext implements CompositeContext {
+        private final Blender blender;
+        private final BlendComposite composite;
+
+        private BlendingContext(BlendComposite composite) {
+            this.composite = composite;
+            this.blender = Blender.getBlenderFor(composite);
+        }
+
+        public void dispose() {
+        }
+
+        public void compose(Raster src, Raster dstIn, WritableRaster dstOut) {
+            if (src.getSampleModel().getDataType() != DataBuffer.TYPE_INT ||
+                dstIn.getSampleModel().getDataType() != DataBuffer.TYPE_INT ||
+                dstOut.getSampleModel().getDataType() != DataBuffer.TYPE_INT) {
+                throw new IllegalStateException(
+                        "Source and destination must store pixels as INT.");
+            }
+
+            int width = Math.min(src.getWidth(), dstIn.getWidth());
+            int height = Math.min(src.getHeight(), dstIn.getHeight());
+
+            float alpha = composite.getAlpha();
+
+            int[] srcPixel = new int[4];
+            int[] dstPixel = new int[4];
+            int[] srcPixels = new int[width];
+            int[] dstPixels = new int[width];
+
+            for (int y = 0; y < height; y++) {
+                src.getDataElements(0, y, width, 1, srcPixels);
+                dstIn.getDataElements(0, y, width, 1, dstPixels);
+                for (int x = 0; x < width; x++) {
+                    // pixels are stored as INT_ARGB
+                    // our arrays are [R, G, B, A]
+                    int pixel = srcPixels[x];
+                    srcPixel[0] = (pixel >> 16) & 0xFF;
+                    srcPixel[1] = (pixel >>  8) & 0xFF;
+                    srcPixel[2] = (pixel      ) & 0xFF;
+                    srcPixel[3] = (pixel >> 24) & 0xFF;
+
+                    pixel = dstPixels[x];
+                    dstPixel[0] = (pixel >> 16) & 0xFF;
+                    dstPixel[1] = (pixel >>  8) & 0xFF;
+                    dstPixel[2] = (pixel      ) & 0xFF;
+                    dstPixel[3] = (pixel >> 24) & 0xFF;
+
+                    int[] result = blender.blend(srcPixel, dstPixel);
+
+                    // mixes the result with the opacity
+                    dstPixels[x] = ((int) (dstPixel[3] + (result[3] - dstPixel[3]) * alpha) & 0xFF) << 24 |
+                                   ((int) (dstPixel[0] + (result[0] - dstPixel[0]) * alpha) & 0xFF) << 16 |
+                                   ((int) (dstPixel[1] + (result[1] - dstPixel[1]) * alpha) & 0xFF) <<  8 |
+                                    (int) (dstPixel[2] + (result[2] - dstPixel[2]) * alpha) & 0xFF;
+                }
+                dstOut.setDataElements(0, y, width, 1, dstPixels);
+            }
+        }
+    }
+
+    private static abstract class Blender {
+        public abstract int[] blend(int[] src, int[] dst);
+
+        private static void RGBtoHSL(int r, int g, int b, float[] hsl) {
+            float var_R = (r / 255f);
+            float var_G = (g / 255f);
+            float var_B = (b / 255f);
+
+            float var_Min;
+            float var_Max;
+            float del_Max;
+
+            if (var_R > var_G) {
+                var_Min = var_G;
+                var_Max = var_R;
+            } else {
+                var_Min = var_R;
+                var_Max = var_G;
+            }
+            if (var_B > var_Max) {
+                var_Max = var_B;
+            }
+            if (var_B < var_Min) {
+                var_Min = var_B;
+            }
+
+            del_Max = var_Max - var_Min;
+
+            float H, S, L;
+            L = (var_Max + var_Min) / 2f;
+
+            if (del_Max - 0.01f <= 0.0f) {
+                H = 0;
+                S = 0;
+            } else {
+                if (L < 0.5f) {
+                    S = del_Max / (var_Max + var_Min);
+                } else {
+                    S = del_Max / (2 - var_Max - var_Min);
+                }
+
+                float del_R = (((var_Max - var_R) / 6f) + (del_Max / 2f)) / del_Max;
+                float del_G = (((var_Max - var_G) / 6f) + (del_Max / 2f)) / del_Max;
+                float del_B = (((var_Max - var_B) / 6f) + (del_Max / 2f)) / del_Max;
+
+                if (var_R == var_Max) {
+                    H = del_B - del_G;
+                } else if (var_G == var_Max) {
+                    H = (1 / 3f) + del_R - del_B;
+                } else {
+                    H = (2 / 3f) + del_G - del_R;
+                }
+                if (H < 0) {
+                    H += 1;
+                }
+                if (H > 1) {
+                    H -= 1;
+                }
+            }
+
+            hsl[0] = H;
+            hsl[1] = S;
+            hsl[2] = L;
+        }
+
+        private static void HSLtoRGB(float h, float s, float l, int[] rgb) {
+            int R, G, B;
+
+            if (s - 0.01f <= 0.0f) {
+                R = (int) (l * 255.0f);
+                G = (int) (l * 255.0f);
+                B = (int) (l * 255.0f);
+            } else {
+                float var_1, var_2;
+                if (l < 0.5f) {
+                    var_2 = l * (1 + s);
+                } else {
+                    var_2 = (l + s) - (s * l);
+                }
+                var_1 = 2 * l - var_2;
+
+                R = (int) (255.0f * hue2RGB(var_1, var_2, h + (1.0f / 3.0f)));
+                G = (int) (255.0f * hue2RGB(var_1, var_2, h));
+                B = (int) (255.0f * hue2RGB(var_1, var_2, h - (1.0f / 3.0f)));
+            }
+
+            rgb[0] = R;
+            rgb[1] = G;
+            rgb[2] = B;
+        }
+
+        private static float hue2RGB(float v1, float v2, float vH) {
+            if (vH < 0.0f) {
+                vH += 1.0f;
+            }
+            if (vH > 1.0f) {
+                vH -= 1.0f;
+            }
+            if ((6.0f * vH) < 1.0f) {
+                return (v1 + (v2 - v1) * 6.0f * vH);
+            }
+            if ((2.0f * vH) < 1.0f) {
+                return (v2);
+            }
+            if ((3.0f * vH) < 2.0f) {
+                return (v1 + (v2 - v1) * ((2.0f / 3.0f) - vH) * 6.0f);
+            }
+            return (v1);
+        }
+
+        public static Blender getBlenderFor(BlendComposite composite) {
+            switch (composite.getMode()) {
+                case NORMAL:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return src;
+                        }
+                    };
+                case ADD:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                Math.min(255, src[0] + dst[0]),
+                                Math.min(255, src[1] + dst[1]),
+                                Math.min(255, src[2] + dst[2]),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case AVERAGE:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                (src[0] + dst[0]) >> 1,
+                                (src[1] + dst[1]) >> 1,
+                                (src[2] + dst[2]) >> 1,
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case BLUE:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                dst[0],
+                                src[1],
+                                dst[2],
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case COLOR:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            float[] srcHSL = new float[3];
+                            RGBtoHSL(src[0], src[1], src[2], srcHSL);
+                            float[] dstHSL = new float[3];
+                            RGBtoHSL(dst[0], dst[1], dst[2], dstHSL);
+
+                            int[] result = new int[4];
+                            HSLtoRGB(srcHSL[0], srcHSL[1], dstHSL[2], result);
+                            result[3] = Math.min(255, src[3] + dst[3]);
+
+                            return result;
+                        }
+                    };
+                case COLOR_BURN:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                src[0] == 0 ? 0 :
+                                    Math.max(0, 255 - (((255 - dst[0]) << 8) / src[0])),
+                                src[1] == 0 ? 0 :
+                                    Math.max(0, 255 - (((255 - dst[1]) << 8) / src[1])),
+                                src[2] == 0 ? 0 :
+                                    Math.max(0, 255 - (((255 - dst[2]) << 8) / src[2])),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case COLOR_DODGE:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                src[0] == 255 ? 255 :
+                                    Math.min((dst[0] << 8) / (255 - src[0]), 255),
+                                src[1] == 255 ? 255 :
+                                    Math.min((dst[1] << 8) / (255 - src[1]), 255),
+                                src[2] == 255 ? 255 :
+                                    Math.min((dst[2] << 8) / (255 - src[2]), 255),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case DARKEN:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                Math.min(src[0], dst[0]),
+                                Math.min(src[1], dst[1]),
+                                Math.min(src[2], dst[2]),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case DIFFERENCE:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                Math.abs(dst[0] - src[0]),
+                                Math.abs(dst[1] - src[1]),
+                                Math.abs(dst[2] - src[2]),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case EXCLUSION:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                dst[0] + src[0] - (dst[0] * src[0] >> 7),
+                                dst[1] + src[1] - (dst[1] * src[1] >> 7),
+                                dst[2] + src[2] - (dst[2] * src[2] >> 7),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case FREEZE:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                src[0] == 0 ? 0 : Math.max(0, 255 - (255 - dst[0]) * (255 - dst[0]) / src[0]),
+                                src[1] == 0 ? 0 : Math.max(0, 255 - (255 - dst[1]) * (255 - dst[1]) / src[1]),
+                                src[2] == 0 ? 0 : Math.max(0, 255 - (255 - dst[2]) * (255 - dst[2]) / src[2]),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case GLOW:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                dst[0] == 255 ? 255 : Math.min(255, src[0] * src[0] / (255 - dst[0])),
+                                dst[1] == 255 ? 255 : Math.min(255, src[1] * src[1] / (255 - dst[1])),
+                                dst[2] == 255 ? 255 : Math.min(255, src[2] * src[2] / (255 - dst[2])),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case GREEN:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                dst[0],
+                                dst[1],
+                                src[2],
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case HARD_LIGHT:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                src[0] < 128 ? dst[0] * src[0] >> 7 :
+                                    255 - ((255 - src[0]) * (255 - dst[0]) >> 7),
+                                src[1] < 128 ? dst[1] * src[1] >> 7 :
+                                    255 - ((255 - src[1]) * (255 - dst[1]) >> 7),
+                                src[2] < 128 ? dst[2] * src[2] >> 7 :
+                                    255 - ((255 - src[2]) * (255 - dst[2]) >> 7),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case HEAT:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                dst[0] == 0 ? 0 : Math.max(0, 255 - (255 - src[0]) * (255 - src[0]) / dst[0]),
+                                dst[1] == 0 ? 0 : Math.max(0, 255 - (255 - src[1]) * (255 - src[1]) / dst[1]),
+                                dst[2] == 0 ? 0 : Math.max(0, 255 - (255 - src[2]) * (255 - src[2]) / dst[2]),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case HUE:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            float[] srcHSL = new float[3];
+                            RGBtoHSL(src[0], src[1], src[2], srcHSL);
+                            float[] dstHSL = new float[3];
+                            RGBtoHSL(dst[0], dst[1], dst[2], dstHSL);
+
+                            int[] result = new int[4];
+                            HSLtoRGB(srcHSL[0], dstHSL[1], dstHSL[2], result);
+                            result[3] = Math.min(255, src[3] + dst[3]);
+
+                            return result;
+                        }
+                    };
+                case INVERSE_COLOR_BURN:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                dst[0] == 0 ? 0 :
+                                    Math.max(0, 255 - (((255 - src[0]) << 8) / dst[0])),
+                                dst[1] == 0 ? 0 :
+                                    Math.max(0, 255 - (((255 - src[1]) << 8) / dst[1])),
+                                dst[2] == 0 ? 0 :
+                                    Math.max(0, 255 - (((255 - src[2]) << 8) / dst[2])),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case INVERSE_COLOR_DODGE:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                dst[0] == 255 ? 255 :
+                                    Math.min((src[0] << 8) / (255 - dst[0]), 255),
+                                dst[1] == 255 ? 255 :
+                                    Math.min((src[1] << 8) / (255 - dst[1]), 255),
+                                dst[2] == 255 ? 255 :
+                                    Math.min((src[2] << 8) / (255 - dst[2]), 255),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case LIGHTEN:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                Math.max(src[0], dst[0]),
+                                Math.max(src[1], dst[1]),
+                                Math.max(src[2], dst[2]),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case LUMINOSITY:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            float[] srcHSL = new float[3];
+                            RGBtoHSL(src[0], src[1], src[2], srcHSL);
+                            float[] dstHSL = new float[3];
+                            RGBtoHSL(dst[0], dst[1], dst[2], dstHSL);
+
+                            int[] result = new int[4];
+                            HSLtoRGB(dstHSL[0], dstHSL[1], srcHSL[2], result);
+                            result[3] = Math.min(255, src[3] + dst[3]);
+
+                            return result;
+                        }
+                    };
+                case MULTIPLY:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                (src[0] * dst[0]) >> 8,
+                                (src[1] * dst[1]) >> 8,
+                                (src[2] * dst[2]) >> 8,
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case NEGATION:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                255 - Math.abs(255 - dst[0] - src[0]),
+                                255 - Math.abs(255 - dst[1] - src[1]),
+                                255 - Math.abs(255 - dst[2] - src[2]),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case OVERLAY:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                dst[0] < 128 ? dst[0] * src[0] >> 7 :
+                                    255 - ((255 - dst[0]) * (255 - src[0]) >> 7),
+                                dst[1] < 128 ? dst[1] * src[1] >> 7 :
+                                    255 - ((255 - dst[1]) * (255 - src[1]) >> 7),
+                                dst[2] < 128 ? dst[2] * src[2] >> 7 :
+                                    255 - ((255 - dst[2]) * (255 - src[2]) >> 7),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case RED:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                src[0],
+                                dst[1],
+                                dst[2],
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case REFLECT:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                src[0] == 255 ? 255 : Math.min(255, dst[0] * dst[0] / (255 - src[0])),
+                                src[1] == 255 ? 255 : Math.min(255, dst[1] * dst[1] / (255 - src[1])),
+                                src[2] == 255 ? 255 : Math.min(255, dst[2] * dst[2] / (255 - src[2])),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case SATURATION:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            float[] srcHSL = new float[3];
+                            RGBtoHSL(src[0], src[1], src[2], srcHSL);
+                            float[] dstHSL = new float[3];
+                            RGBtoHSL(dst[0], dst[1], dst[2], dstHSL);
+
+                            int[] result = new int[4];
+                            HSLtoRGB(dstHSL[0], srcHSL[1], dstHSL[2], result);
+                            result[3] = Math.min(255, src[3] + dst[3]);
+
+                            return result;
+                        }
+                    };
+                case SCREEN:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                255 - ((255 - src[0]) * (255 - dst[0]) >> 8),
+                                255 - ((255 - src[1]) * (255 - dst[1]) >> 8),
+                                255 - ((255 - src[2]) * (255 - dst[2]) >> 8),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case SOFT_BURN:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                dst[0] + src[0] < 256 ?
+	                                (dst[0] == 255 ? 255 :
+                                        Math.min(255, (src[0] << 7) / (255 - dst[0]))) :
+                                            Math.max(0, 255 - (((255 - dst[0]) << 7) / src[0])),
+                                dst[1] + src[1] < 256 ?
+	                                (dst[1] == 255 ? 255 :
+                                        Math.min(255, (src[1] << 7) / (255 - dst[1]))) :
+                                            Math.max(0, 255 - (((255 - dst[1]) << 7) / src[1])),
+                                dst[2] + src[2] < 256 ?
+	                                (dst[2] == 255 ? 255 :
+                                        Math.min(255, (src[2] << 7) / (255 - dst[2]))) :
+                                            Math.max(0, 255 - (((255 - dst[2]) << 7) / src[2])),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case SOFT_DODGE:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                dst[0] + src[0] < 256 ?
+                                    (src[0] == 255 ? 255 :
+                                        Math.min(255, (dst[0] << 7) / (255 - src[0]))) :
+                                            Math.max(0, 255 - (((255 - src[0]) << 7) / dst[0])),
+                                dst[1] + src[1] < 256 ?
+                                    (src[1] == 255 ? 255 :
+                                        Math.min(255, (dst[1] << 7) / (255 - src[1]))) :
+                                            Math.max(0, 255 - (((255 - src[1]) << 7) / dst[1])),
+                                dst[2] + src[2] < 256 ?
+                                    (src[2] == 255 ? 255 :
+                                        Math.min(255, (dst[2] << 7) / (255 - src[2]))) :
+                                            Math.max(0, 255 - (((255 - src[2]) << 7) / dst[2])),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case SOFT_LIGHT:
+                    break;
+                case STAMP:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                Math.max(0, Math.min(255, dst[0] + 2 * src[0] - 256)),
+                                Math.max(0, Math.min(255, dst[1] + 2 * src[1] - 256)),
+                                Math.max(0, Math.min(255, dst[2] + 2 * src[2] - 256)),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+                case SUBTRACT:
+                    return new Blender() {
+                        @Override
+                        public int[] blend(int[] src, int[] dst) {
+                            return new int[] {
+                                Math.max(0, src[0] + dst[0] - 256),
+                                Math.max(0, src[1] + dst[1] - 256),
+                                Math.max(0, src[2] + dst[2] - 256),
+                                Math.min(255, src[3] + dst[3])
+                            };
+                        }
+                    };
+            }
+            throw new IllegalArgumentException("Blender not implement for " +
+                                               composite.getMode().name());
+        }
+    }
+}