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 26282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski/** 27282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Delegate implementing the native methods of android.graphics.RadialGradient 28282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 29282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Through the layoutlib_create tool, the original native methods of RadialGradient have been 30282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * replaced by calls to methods of the same name in this delegate class. 31282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 32282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * This class behaves like the original native implementation, but in Java, keeping previously 33282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * native data into its own objects and mapping them to int that are sent back and forth between 34282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * it and the original RadialGradient class. 35282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 36282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Because this extends {@link Shader_Delegate}, there's no need to use a {@link DelegateManager}, 37282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * as all the Shader classes will be added to the manager owned by {@link Shader_Delegate}. 38282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 39282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @see Shader_Delegate 40282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 41282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski */ 42282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinskipublic class RadialGradient_Delegate extends Gradient_Delegate { 43282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 44282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // ---- delegate data ---- 45282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private java.awt.Paint mJavaPaint; 46282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 47282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // ---- Public Helper methods ---- 48282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 49282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 50282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public java.awt.Paint getJavaPaint() { 51282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return mJavaPaint; 52282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 53282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 54282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // ---- native methods ---- 55282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 56282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @LayoutlibDelegate 5788a8364c386c694f7ad56662ef89713dbf7c9d63Narayan Kamath /*package*/ static long nativeCreate1(float x, float y, float radius, 58282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int colors[], float positions[], int tileMode) { 59282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski RadialGradient_Delegate newDelegate = new RadialGradient_Delegate(x, y, radius, 60282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski colors, positions, Shader_Delegate.getTileMode(tileMode)); 61282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return sManager.addNewDelegate(newDelegate); 62282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 63282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 64282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @LayoutlibDelegate 6588a8364c386c694f7ad56662ef89713dbf7c9d63Narayan Kamath /*package*/ static long nativeCreate2(float x, float y, float radius, 66282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int color0, int color1, int tileMode) { 67282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return nativeCreate1(x, y, radius, new int[] { color0, color1 }, null /*positions*/, 68282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski tileMode); 69282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 70282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 71282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // ---- Private delegate/helper methods ---- 72282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 73282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski /** 74282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Create a shader that draws a radial gradient given the center and radius. 75282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 76282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param x The x-coordinate of the center of the radius 77282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param y The y-coordinate of the center of the radius 78282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param radius Must be positive. The radius of the circle for this 79282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * gradient 80282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param colors The colors to be distributed between the center and edge of 81282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * the circle 82282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param positions May be NULL. The relative position of each corresponding 83282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * color in the colors array. If this is NULL, the the colors are 84282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * distributed evenly between the center and edge of the circle. 85282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param tile The Shader tiling mode 86282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski */ 87282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private RadialGradient_Delegate(float x, float y, float radius, int colors[], float positions[], 88282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski TileMode tile) { 89282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski super(colors, positions); 90282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mJavaPaint = new RadialGradientPaint(x, y, radius, mColors, mPositions, tile); 91282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 92282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 93282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private class RadialGradientPaint extends GradientPaint { 94282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 95282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final float mX; 96282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final float mY; 97282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final float mRadius; 98282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 99282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public RadialGradientPaint(float x, float y, float radius, 100282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int[] colors, float[] positions, TileMode mode) { 101282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski super(colors, positions, mode); 102282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mX = x; 103282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mY = y; 104282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mRadius = radius; 105282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 106282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 107282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 108282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public java.awt.PaintContext createContext( 109282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.image.ColorModel colorModel, 110282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.Rectangle deviceBounds, 111282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.Rectangle2D userBounds, 112282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform xform, 113282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.RenderingHints hints) { 114282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski precomputeGradientColors(); 115282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 116282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform canvasMatrix; 117282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski try { 118282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski canvasMatrix = xform.createInverse(); 119282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } catch (java.awt.geom.NoninvertibleTransformException e) { 120282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski Bridge.getLog().fidelityWarning(LayoutLog.TAG_MATRIX_INVERSE, 121282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski "Unable to inverse matrix in RadialGradient", e, null /*data*/); 122282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski canvasMatrix = new java.awt.geom.AffineTransform(); 123282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 124282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 125282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform localMatrix = getLocalMatrix(); 126282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski try { 127282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski localMatrix = localMatrix.createInverse(); 128282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } catch (java.awt.geom.NoninvertibleTransformException e) { 129282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski Bridge.getLog().fidelityWarning(LayoutLog.TAG_MATRIX_INVERSE, 130282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski "Unable to inverse matrix in RadialGradient", e, null /*data*/); 131282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski localMatrix = new java.awt.geom.AffineTransform(); 132282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 133282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 134282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return new RadialGradientPaintContext(canvasMatrix, localMatrix, colorModel); 135282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 136282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 137282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private class RadialGradientPaintContext implements java.awt.PaintContext { 138282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 139282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final java.awt.geom.AffineTransform mCanvasMatrix; 140282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final java.awt.geom.AffineTransform mLocalMatrix; 141282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final java.awt.image.ColorModel mColorModel; 142282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 143282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public RadialGradientPaintContext( 144282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform canvasMatrix, 145282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform localMatrix, 146282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.image.ColorModel colorModel) { 147282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mCanvasMatrix = canvasMatrix; 148282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mLocalMatrix = localMatrix; 149282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mColorModel = colorModel; 150282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 151282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 152282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 153282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public void dispose() { 154282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 155282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 156282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 157282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public java.awt.image.ColorModel getColorModel() { 158282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return mColorModel; 159282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 160282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 161282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 162282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public java.awt.image.Raster getRaster(int x, int y, int w, int h) { 163282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.image.BufferedImage image = new java.awt.image.BufferedImage(w, h, 164282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.image.BufferedImage.TYPE_INT_ARGB); 165282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 166282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int[] data = new int[w*h]; 167282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 168282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // compute distance from each point to the center, and figure out the distance from 169282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // it. 170282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int index = 0; 171282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float[] pt1 = new float[2]; 172282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float[] pt2 = new float[2]; 173282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski for (int iy = 0 ; iy < h ; iy++) { 174282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski for (int ix = 0 ; ix < w ; ix++) { 175282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // handle the canvas transform 176282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski pt1[0] = x + ix; 177282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski pt1[1] = y + iy; 178282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mCanvasMatrix.transform(pt1, 0, pt2, 0, 1); 179282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 180282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // handle the local matrix 181282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski pt1[0] = pt2[0] - mX; 182282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski pt1[1] = pt2[1] - mY; 183282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mLocalMatrix.transform(pt1, 0, pt2, 0, 1); 184282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 185282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float _x = pt2[0]; 186282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float _y = pt2[1]; 187282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float distance = (float) Math.sqrt(_x * _x + _y * _y); 188282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 189282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski data[index++] = getGradientColor(distance / mRadius); 190282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 191282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 192282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 193282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski image.setRGB(0 /*startX*/, 0 /*startY*/, w, h, data, 0 /*offset*/, w /*scansize*/); 194282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 195282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return image.getRaster(); 196282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 197282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 198282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 199282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 200282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 201282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski} 202