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 Lesinski/** 25282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Delegate implementing the native methods of android.graphics.SweepGradient 26282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 27282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Through the layoutlib_create tool, the original native methods of SweepGradient have been 28282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * replaced by calls to methods of the same name in this delegate class. 29282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 30282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * This class behaves like the original native implementation, but in Java, keeping previously 31282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * native data into its own objects and mapping them to int that are sent back and forth between 32282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * it and the original SweepGradient class. 33282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 34282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Because this extends {@link Shader_Delegate}, there's no need to use a {@link DelegateManager}, 35282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * as all the Shader classes will be added to the manager owned by {@link Shader_Delegate}. 36282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 37282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @see Shader_Delegate 38282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 39282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski */ 40282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinskipublic class SweepGradient_Delegate extends Gradient_Delegate { 41282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 42282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // ---- delegate data ---- 43282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private java.awt.Paint mJavaPaint; 44282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 45282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // ---- Public Helper methods ---- 46282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 47282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 48282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public java.awt.Paint getJavaPaint() { 49282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return mJavaPaint; 50282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 51282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 52282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // ---- native methods ---- 53282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 54282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @LayoutlibDelegate 5588a8364c386c694f7ad56662ef89713dbf7c9d63Narayan Kamath /*package*/ static long nativeCreate1(float x, float y, int colors[], float positions[]) { 56282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski SweepGradient_Delegate newDelegate = new SweepGradient_Delegate(x, y, colors, positions); 57282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return sManager.addNewDelegate(newDelegate); 58282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 59282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 60282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @LayoutlibDelegate 6188a8364c386c694f7ad56662ef89713dbf7c9d63Narayan Kamath /*package*/ static long nativeCreate2(float x, float y, int color0, int color1) { 62282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return nativeCreate1(x, y, new int[] { color0, color1 }, null /*positions*/); 63282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 64282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 65282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // ---- Private delegate/helper methods ---- 66282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 67282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski /** 68282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * A subclass of Shader that draws a sweep gradient around a center point. 69282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 70282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param cx The x-coordinate of the center 71282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param cy The y-coordinate of the center 72282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param colors The colors to be distributed between around the center. 73282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * There must be at least 2 colors in the array. 74282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * @param positions May be NULL. The relative position of 75282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * each corresponding color in the colors array, beginning 76282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * with 0 and ending with 1.0. If the values are not 77282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * monotonic, the drawing may produce unexpected results. 78282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * If positions is NULL, then the colors are automatically 79282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * spaced evenly. 80282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski */ 81282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private SweepGradient_Delegate(float cx, float cy, 82282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int colors[], float positions[]) { 83282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski super(colors, positions); 84282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mJavaPaint = new SweepGradientPaint(cx, cy, mColors, mPositions); 85282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 86282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 87282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private class SweepGradientPaint extends GradientPaint { 88282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 89282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final float mCx; 90282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final float mCy; 91282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 92282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public SweepGradientPaint(float cx, float cy, int[] colors, 93282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float[] positions) { 94282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski super(colors, positions, null /*tileMode*/); 95282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mCx = cx; 96282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mCy = cy; 97282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 98282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 99282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 100282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public java.awt.PaintContext createContext( 101282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.image.ColorModel colorModel, 102282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.Rectangle deviceBounds, 103282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.Rectangle2D userBounds, 104282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform xform, 105282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.RenderingHints hints) { 106282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski precomputeGradientColors(); 107282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 108282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform canvasMatrix; 109282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski try { 110282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski canvasMatrix = xform.createInverse(); 111282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } catch (java.awt.geom.NoninvertibleTransformException e) { 112282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski Bridge.getLog().fidelityWarning(LayoutLog.TAG_MATRIX_INVERSE, 113282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski "Unable to inverse matrix in SweepGradient", e, null /*data*/); 114282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski canvasMatrix = new java.awt.geom.AffineTransform(); 115282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 116282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 117282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform localMatrix = getLocalMatrix(); 118282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski try { 119282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski localMatrix = localMatrix.createInverse(); 120282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } catch (java.awt.geom.NoninvertibleTransformException e) { 121282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski Bridge.getLog().fidelityWarning(LayoutLog.TAG_MATRIX_INVERSE, 122282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski "Unable to inverse matrix in SweepGradient", e, null /*data*/); 123282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski localMatrix = new java.awt.geom.AffineTransform(); 124282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 125282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 126282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return new SweepGradientPaintContext(canvasMatrix, localMatrix, colorModel); 127282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 128282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 129282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private class SweepGradientPaintContext implements java.awt.PaintContext { 130282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 131282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final java.awt.geom.AffineTransform mCanvasMatrix; 132282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final java.awt.geom.AffineTransform mLocalMatrix; 133282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski private final java.awt.image.ColorModel mColorModel; 134282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 135282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public SweepGradientPaintContext( 136282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform canvasMatrix, 137282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.geom.AffineTransform localMatrix, 138282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski java.awt.image.ColorModel colorModel) { 139282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mCanvasMatrix = canvasMatrix; 140282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mLocalMatrix = localMatrix; 141282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mColorModel = colorModel; 142282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 143282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 144282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 145282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public void dispose() { 146282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 147282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 148282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 149282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public java.awt.image.ColorModel getColorModel() { 150282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return mColorModel; 151282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 152282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 153282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski @Override 154282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski public java.awt.image.Raster getRaster(int x, int y, int w, int h) { 155158ac454073a460375123d7d05152a7c6490efb6Diego Perez java.awt.image.BufferedImage image = new java.awt.image.BufferedImage( 156158ac454073a460375123d7d05152a7c6490efb6Diego Perez mColorModel, mColorModel.createCompatibleWritableRaster(w, h), 157158ac454073a460375123d7d05152a7c6490efb6Diego Perez mColorModel.isAlphaPremultiplied(), null); 158282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 159282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int[] data = new int[w*h]; 160282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 161282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // compute angle from each point to the center, and figure out the distance from 162282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // it. 163282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int index = 0; 164282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float[] pt1 = new float[2]; 165282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float[] pt2 = new float[2]; 166282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski for (int iy = 0 ; iy < h ; iy++) { 167282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski for (int ix = 0 ; ix < w ; ix++) { 168282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // handle the canvas transform 169282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski pt1[0] = x + ix; 170282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski pt1[1] = y + iy; 171282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mCanvasMatrix.transform(pt1, 0, pt2, 0, 1); 172282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 173282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // handle the local matrix 174282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski pt1[0] = pt2[0] - mCx; 175282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski pt1[1] = pt2[1] - mCy; 176282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski mLocalMatrix.transform(pt1, 0, pt2, 0, 1); 177282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 178282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float dx = pt2[0]; 179282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float dy = pt2[1]; 180282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 181282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski float angle; 182282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski if (dx == 0) { 183282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski angle = (float) (dy < 0 ? 3 * Math.PI / 2 : Math.PI / 2); 184282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } else if (dy == 0) { 185282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski angle = (float) (dx < 0 ? Math.PI : 0); 186282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } else { 187282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski angle = (float) Math.atan(dy / dx); 188282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski if (dx > 0) { 189282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski if (dy < 0) { 190282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski angle += Math.PI * 2; 191282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 192282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } else { 193282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski angle += Math.PI; 194282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 195282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 196282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 197282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski // convert to 0-1. value and get color 198282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski data[index++] = getGradientColor((float) (angle / (2 * Math.PI))); 199282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 200282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 201282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 202282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski image.setRGB(0 /*startX*/, 0 /*startY*/, w, h, data, 0 /*offset*/, w /*scansize*/); 203282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 204282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski return image.getRaster(); 205282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 206282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 207282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 208282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 209282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski} 210