1 /* 2 * Copyright (C) 2015 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.camera.util; 18 19 import android.graphics.Canvas; 20 import android.graphics.Paint; 21 import android.graphics.Rect; 22 import android.graphics.RectF; 23 24 /** 25 * Drawing utilities for rendering debug artifacts. 26 */ 27 public class DebugBoundsRenderer { 28 /** 29 * Draw a bounding box with indicators in the corners and crosshairs in 30 * the provided canvas object. 31 */ 32 public static void drawBounds(Canvas canvas, Paint paint, float size, Rect rect) { 33 drawBounds(canvas, paint, size, rect.left, rect.top, rect.right, rect.bottom); 34 } 35 36 /** 37 * Draw a bounding box with indicators in the corners and crosshairs in 38 * the provided canvas object. 39 */ 40 public static void drawBounds(Canvas canvas, Paint paint, float size, RectF rect) { 41 drawBounds(canvas, paint, size, rect.left, rect.top, rect.right, rect.bottom); 42 } 43 44 /** 45 * Draw a bounding box with indicators in the corners and crosshairs in 46 * the provided canvas object. 47 */ 48 public static void drawBounds(Canvas canvas, Paint paint, float size, float x1, float y1, 49 float x2, float y2) { 50 // Top left 51 // horizontal 52 canvas.drawLine(x1, y1, x1 + size, y1, paint); 53 // vertical 54 canvas.drawLine(x1, y1, x1, y1 + size, paint); 55 56 // top right 57 // horizontal 58 canvas.drawLine(x2 - size, y1, x2, y1, paint); 59 // vertical 60 canvas.drawLine(x2, y1, x2, y1 + size, paint); 61 62 // bottom right 63 // horizontal 64 canvas.drawLine(x2 - size, y2, x2, y2, paint); 65 // vertical 66 canvas.drawLine(x2, y2- size, x2, y2, paint); 67 68 // bottom left 69 // horizontal 70 canvas.drawLine(x1, y2, x1 + size, y2, paint); 71 // vertical 72 canvas.drawLine(x1, y2 - size, x1, y2, paint); 73 74 // crosshairs in the center 75 float cX = (x1 + x2) / 2; 76 float cY = (y1 + y2) / 2; 77 float halfSize = size / 2; 78 canvas.drawLine(cX - halfSize, cY, cX + halfSize, cY, paint); 79 canvas.drawLine(cX, cY - halfSize, cX, cY + halfSize, paint); 80 } 81 } 82
