1282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski/* 2282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Copyright (C) 2010 The Android Open Source Project 3282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 4282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Licensed under the Apache License, Version 2.0 (the "License"); 5282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * you may not use this file except in compliance with the License. 6282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * You may obtain a copy of the License at 7282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 8282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * http://www.apache.org/licenses/LICENSE-2.0 9282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 10282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Unless required by applicable law or agreed to in writing, software 11282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * distributed under the License is distributed on an "AS IS" BASIS, 12282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * See the License for the specific language governing permissions and 14282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * limitations under the License. 15282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski */ 16282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 17282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinskipackage android.graphics; 18282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 19282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinskiimport com.android.ide.common.rendering.api.LayoutLog; 20282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinskiimport com.android.layoutlib.bridge.Bridge; 21282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinskiimport com.android.layoutlib.bridge.impl.DelegateManager; 22282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinskiimport com.android.tools.layoutlib.annotations.LayoutlibDelegate; 23282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 24282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinskiimport android.graphics.Shader.TileMode; 25282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 26e5be1d7a397db08a4dd75c66bdbbc6e2b61baaa8Diego Perezimport java.awt.image.ColorModel; 27e5be1d7a397db08a4dd75c66bdbbc6e2b61baaa8Diego Perez 28282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski/** 29282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Delegate implementing the native methods of android.graphics.RadialGradient 30282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 31282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Through the layoutlib_create tool, the original native methods of RadialGradient have been 32282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * replaced by calls to methods of the same name in this delegate class. 33282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 34282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * This class behaves like the original native implementation, but in Java, keeping previously 35282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * native data into its own objects and mapping them to int that are sent back and forth between 36282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * it and the original RadialGradient class. 37282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 38282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Because this extends {@link Shader_Delegate}, there's no need to use a {@link DelegateManager}, 39282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * as all the Shader classes will be added to the manager owned by {@link Shader_Delegate}. 40282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 41282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @see Shader_Delegate 42282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 43282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski */ 44282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinskipublic class RadialGradient_Delegate extends Gradient_Delegate { 45282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 46282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // ---- delegate data ---- 47282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private java.awt.Paint mJavaPaint; 48282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 49282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // ---- Public Helper methods ---- 50282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 51282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 52282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public java.awt.Paint getJavaPaint() { 53282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return mJavaPaint; 54282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 55282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 56282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // ---- native methods ---- 57282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 58282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @LayoutlibDelegate 5988a8364c386c694f7ad56662ef89713dbf7c9d63Narayan Kamath /*package*/ static long nativeCreate1(float x, float y, float radius, 60282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int colors[], float positions[], int tileMode) { 61282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski RadialGradient_Delegate newDelegate = new RadialGradient_Delegate(x, y, radius, 62282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski colors, positions, Shader_Delegate.getTileMode(tileMode)); 63282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return sManager.addNewDelegate(newDelegate); 64282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 65282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 66282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @LayoutlibDelegate 6788a8364c386c694f7ad56662ef89713dbf7c9d63Narayan Kamath /*package*/ static long nativeCreate2(float x, float y, float radius, 68282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int color0, int color1, int tileMode) { 69282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return nativeCreate1(x, y, radius, new int[] { color0, color1 }, null /*positions*/, 70282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski tileMode); 71282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 72282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 73282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // ---- Private delegate/helper methods ---- 74282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 75282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski /** 76282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Create a shader that draws a radial gradient given the center and radius. 77282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 78282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param x The x-coordinate of the center of the radius 79282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param y The y-coordinate of the center of the radius 80282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param radius Must be positive. The radius of the circle for this 81282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * gradient 82282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param colors The colors to be distributed between the center and edge of 83282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * the circle 84282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param positions May be NULL. The relative position of each corresponding 85282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * color in the colors array. If this is NULL, the the colors are 86282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * distributed evenly between the center and edge of the circle. 87282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param tile The Shader tiling mode 88282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski */ 89282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private RadialGradient_Delegate(float x, float y, float radius, int colors[], float positions[], 90282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski TileMode tile) { 91282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski super(colors, positions); 92282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mJavaPaint = new RadialGradientPaint(x, y, radius, mColors, mPositions, tile); 93282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 94282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 95282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private class RadialGradientPaint extends GradientPaint { 96282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 97282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final float mX; 98282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final float mY; 99282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final float mRadius; 100282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 101282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public RadialGradientPaint(float x, float y, float radius, 102282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int[] colors, float[] positions, TileMode mode) { 103282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski super(colors, positions, mode); 104282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mX = x; 105282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mY = y; 106282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mRadius = radius; 107282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 108282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 109282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 110282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public java.awt.PaintContext createContext( 111282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.image.ColorModel colorModel, 112282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.Rectangle deviceBounds, 113282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.Rectangle2D userBounds, 114282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform xform, 115282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.RenderingHints hints) { 116282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski precomputeGradientColors(); 117282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 118282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform canvasMatrix; 119282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski try { 120282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski canvasMatrix = xform.createInverse(); 121282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } catch (java.awt.geom.NoninvertibleTransformException e) { 122282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski Bridge.getLog().fidelityWarning(LayoutLog.TAG_MATRIX_INVERSE, 123282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski "Unable to inverse matrix in RadialGradient", e, null /*data*/); 124282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski canvasMatrix = new java.awt.geom.AffineTransform(); 125282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 126282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 127282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform localMatrix = getLocalMatrix(); 128282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski try { 129282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski localMatrix = localMatrix.createInverse(); 130282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } catch (java.awt.geom.NoninvertibleTransformException e) { 131282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski Bridge.getLog().fidelityWarning(LayoutLog.TAG_MATRIX_INVERSE, 132282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski "Unable to inverse matrix in RadialGradient", e, null /*data*/); 133282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski localMatrix = new java.awt.geom.AffineTransform(); 134282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 135282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 136282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return new RadialGradientPaintContext(canvasMatrix, localMatrix, colorModel); 137282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 138282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 139282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private class RadialGradientPaintContext implements java.awt.PaintContext { 140282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 141282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final java.awt.geom.AffineTransform mCanvasMatrix; 142282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final java.awt.geom.AffineTransform mLocalMatrix; 143282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final java.awt.image.ColorModel mColorModel; 144282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 145282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public RadialGradientPaintContext( 146282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform canvasMatrix, 147282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform localMatrix, 148282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.image.ColorModel colorModel) { 149282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mCanvasMatrix = canvasMatrix; 150282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mLocalMatrix = localMatrix; 151e5be1d7a397db08a4dd75c66bdbbc6e2b61baaa8Diego Perez mColorModel = colorModel.hasAlpha() ? colorModel : ColorModel.getRGBdefault(); 152282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 153282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 154282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 155282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public void dispose() { 156282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 157282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 158282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 159282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public java.awt.image.ColorModel getColorModel() { 160282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return mColorModel; 161282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 162282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 163282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 164282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public java.awt.image.Raster getRaster(int x, int y, int w, int h) { 1652d3449f982f9f4b9f4370142bb846d2dbab5a38eDiego Perez java.awt.image.BufferedImage image = new java.awt.image.BufferedImage( 1662d3449f982f9f4b9f4370142bb846d2dbab5a38eDiego Perez mColorModel, mColorModel.createCompatibleWritableRaster(w, h), 1672d3449f982f9f4b9f4370142bb846d2dbab5a38eDiego Perez mColorModel.isAlphaPremultiplied(), null); 168282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 169282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int[] data = new int[w*h]; 170282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 171282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // compute distance from each point to the center, and figure out the distance from 172282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // it. 173282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int index = 0; 174282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float[] pt1 = new float[2]; 175282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float[] pt2 = new float[2]; 176282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski for (int iy = 0 ; iy < h ; iy++) { 177282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski for (int ix = 0 ; ix < w ; ix++) { 178282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // handle the canvas transform 179282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski pt1[0] = x + ix; 180282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski pt1[1] = y + iy; 181282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mCanvasMatrix.transform(pt1, 0, pt2, 0, 1); 182282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 183282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // handle the local matrix 184282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski pt1[0] = pt2[0] - mX; 185282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski pt1[1] = pt2[1] - mY; 186282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mLocalMatrix.transform(pt1, 0, pt2, 0, 1); 187282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 188282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float _x = pt2[0]; 189282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float _y = pt2[1]; 19033253a4baa6279f81a73425b49dfb6abe5f5416eNeil Fuller float distance = (float) Math.hypot(_x, _y); 191282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 192282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski data[index++] = getGradientColor(distance / mRadius); 193282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 194282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 195282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 196282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski image.setRGB(0 /*startX*/, 0 /*startY*/, w, h, data, 0 /*offset*/, w /*scansize*/); 197282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 198282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return image.getRaster(); 199282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 200282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 201282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 202282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 203282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 204282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski} 205