1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.gallery3d.filtershow.crop; 18 19 import android.graphics.Canvas; 20 import android.graphics.Color; 21 import android.graphics.Matrix; 22 import android.graphics.Paint; 23 import android.graphics.Path; 24 import android.graphics.RectF; 25 import android.graphics.Region; 26 import android.graphics.drawable.Drawable; 27 28 public abstract class CropDrawingUtils { 29 30 public static void drawRuleOfThird(Canvas canvas, RectF bounds) { 31 Paint p = new Paint(); 32 p.setStyle(Paint.Style.STROKE); 33 p.setColor(Color.argb(128, 255, 255, 255)); 34 p.setStrokeWidth(2); 35 float stepX = bounds.width() / 3.0f; 36 float stepY = bounds.height() / 3.0f; 37 float x = bounds.left + stepX; 38 float y = bounds.top + stepY; 39 for (int i = 0; i < 2; i++) { 40 canvas.drawLine(x, bounds.top, x, bounds.bottom, p); 41 x += stepX; 42 } 43 for (int j = 0; j < 2; j++) { 44 canvas.drawLine(bounds.left, y, bounds.right, y, p); 45 y += stepY; 46 } 47 } 48 49 public static void drawCropRect(Canvas canvas, RectF bounds) { 50 Paint p = new Paint(); 51 p.setStyle(Paint.Style.STROKE); 52 p.setColor(Color.WHITE); 53 p.setStrokeWidth(3); 54 canvas.drawRect(bounds, p); 55 } 56 57 public static void drawShade(Canvas canvas, RectF bounds) { 58 int w = canvas.getWidth(); 59 int h = canvas.getHeight(); 60 Paint p = new Paint(); 61 p.setStyle(Paint.Style.FILL); 62 p.setColor(Color.BLACK & 0x88000000); 63 64 RectF r = new RectF(); 65 r.set(0,0,w,bounds.top); 66 canvas.drawRect(r, p); 67 r.set(0,bounds.top,bounds.left,h); 68 canvas.drawRect(r, p); 69 r.set(bounds.left,bounds.bottom,w,h); 70 canvas.drawRect(r, p); 71 r.set(bounds.right,bounds.top,w,bounds.bottom); 72 canvas.drawRect(r, p); 73 } 74 75 public static void drawIndicator(Canvas canvas, Drawable indicator, int indicatorSize, 76 float centerX, float centerY) { 77 int left = (int) centerX - indicatorSize / 2; 78 int top = (int) centerY - indicatorSize / 2; 79 indicator.setBounds(left, top, left + indicatorSize, top + indicatorSize); 80 indicator.draw(canvas); 81 } 82 83 public static void drawIndicators(Canvas canvas, Drawable cropIndicator, int indicatorSize, 84 RectF bounds, boolean fixedAspect, int selection) { 85 boolean notMoving = (selection == CropObject.MOVE_NONE); 86 if (fixedAspect) { 87 if ((selection == CropObject.TOP_LEFT) || notMoving) { 88 drawIndicator(canvas, cropIndicator, indicatorSize, bounds.left, bounds.top); 89 } 90 if ((selection == CropObject.TOP_RIGHT) || notMoving) { 91 drawIndicator(canvas, cropIndicator, indicatorSize, bounds.right, bounds.top); 92 } 93 if ((selection == CropObject.BOTTOM_LEFT) || notMoving) { 94 drawIndicator(canvas, cropIndicator, indicatorSize, bounds.left, bounds.bottom); 95 } 96 if ((selection == CropObject.BOTTOM_RIGHT) || notMoving) { 97 drawIndicator(canvas, cropIndicator, indicatorSize, bounds.right, bounds.bottom); 98 } 99 } else { 100 if (((selection & CropObject.MOVE_TOP) != 0) || notMoving) { 101 drawIndicator(canvas, cropIndicator, indicatorSize, bounds.centerX(), bounds.top); 102 } 103 if (((selection & CropObject.MOVE_BOTTOM) != 0) || notMoving) { 104 drawIndicator(canvas, cropIndicator, indicatorSize, bounds.centerX(), bounds.bottom); 105 } 106 if (((selection & CropObject.MOVE_LEFT) != 0) || notMoving) { 107 drawIndicator(canvas, cropIndicator, indicatorSize, bounds.left, bounds.centerY()); 108 } 109 if (((selection & CropObject.MOVE_RIGHT) != 0) || notMoving) { 110 drawIndicator(canvas, cropIndicator, indicatorSize, bounds.right, bounds.centerY()); 111 } 112 } 113 } 114 115 public static void drawWallpaperSelectionFrame(Canvas canvas, RectF cropBounds, float spotX, 116 float spotY, Paint p, Paint shadowPaint) { 117 float sx = cropBounds.width() * spotX; 118 float sy = cropBounds.height() * spotY; 119 float cx = cropBounds.centerX(); 120 float cy = cropBounds.centerY(); 121 RectF r1 = new RectF(cx - sx / 2, cy - sy / 2, cx + sx / 2, cy + sy / 2); 122 float temp = sx; 123 sx = sy; 124 sy = temp; 125 RectF r2 = new RectF(cx - sx / 2, cy - sy / 2, cx + sx / 2, cy + sy / 2); 126 canvas.save(); 127 canvas.clipRect(cropBounds); 128 canvas.clipRect(r1, Region.Op.DIFFERENCE); 129 canvas.clipRect(r2, Region.Op.DIFFERENCE); 130 canvas.drawPaint(shadowPaint); 131 canvas.restore(); 132 Path path = new Path(); 133 path.moveTo(r1.left, r1.top); 134 path.lineTo(r1.right, r1.top); 135 path.moveTo(r1.left, r1.top); 136 path.lineTo(r1.left, r1.bottom); 137 path.moveTo(r1.left, r1.bottom); 138 path.lineTo(r1.right, r1.bottom); 139 path.moveTo(r1.right, r1.top); 140 path.lineTo(r1.right, r1.bottom); 141 path.moveTo(r2.left, r2.top); 142 path.lineTo(r2.right, r2.top); 143 path.moveTo(r2.right, r2.top); 144 path.lineTo(r2.right, r2.bottom); 145 path.moveTo(r2.left, r2.bottom); 146 path.lineTo(r2.right, r2.bottom); 147 path.moveTo(r2.left, r2.top); 148 path.lineTo(r2.left, r2.bottom); 149 canvas.drawPath(path, p); 150 } 151 152 public static void drawShadows(Canvas canvas, Paint p, RectF innerBounds, RectF outerBounds) { 153 canvas.drawRect(outerBounds.left, outerBounds.top, innerBounds.right, innerBounds.top, p); 154 canvas.drawRect(innerBounds.right, outerBounds.top, outerBounds.right, innerBounds.bottom, 155 p); 156 canvas.drawRect(innerBounds.left, innerBounds.bottom, outerBounds.right, 157 outerBounds.bottom, p); 158 canvas.drawRect(outerBounds.left, innerBounds.top, innerBounds.left, outerBounds.bottom, p); 159 } 160 161 public static Matrix getBitmapToDisplayMatrix(RectF imageBounds, RectF displayBounds) { 162 Matrix m = new Matrix(); 163 CropDrawingUtils.setBitmapToDisplayMatrix(m, imageBounds, displayBounds); 164 return m; 165 } 166 167 public static boolean setBitmapToDisplayMatrix(Matrix m, RectF imageBounds, 168 RectF displayBounds) { 169 m.reset(); 170 return m.setRectToRect(imageBounds, displayBounds, Matrix.ScaleToFit.CENTER); 171 } 172 173 public static boolean setImageToScreenMatrix(Matrix dst, RectF image, 174 RectF screen, int rotation) { 175 RectF rotatedImage = new RectF(); 176 dst.setRotate(rotation, image.centerX(), image.centerY()); 177 if (!dst.mapRect(rotatedImage, image)) { 178 return false; // fails for rotations that are not multiples of 90 179 // degrees 180 } 181 boolean rToR = dst.setRectToRect(rotatedImage, screen, Matrix.ScaleToFit.CENTER); 182 boolean rot = dst.preRotate(rotation, image.centerX(), image.centerY()); 183 return rToR && rot; 184 } 185 186 } 187
