The Tor Browser / file comparison
comparison: mobile/android/base/toolbar/CanvasDelegate.java
mobile/android/base/toolbar/CanvasDelegate.java
- branch
- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
equal
deleted
inserted
replaced
| -1:000000000000 | 0:7b20059c402e |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 3 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 package org.mozilla.gecko.toolbar; | |
| 6 | |
| 7 import android.graphics.Bitmap; | |
| 8 import android.graphics.Canvas; | |
| 9 import android.graphics.Paint; | |
| 10 import android.graphics.Path; | |
| 11 import android.graphics.PorterDuff.Mode; | |
| 12 import android.graphics.PorterDuffXfermode; | |
| 13 import android.graphics.Shader; | |
| 14 import android.os.Build; | |
| 15 | |
| 16 class CanvasDelegate { | |
| 17 Paint mPaint; | |
| 18 PorterDuffXfermode mMode; | |
| 19 DrawManager mDrawManager; | |
| 20 | |
| 21 // DrawManager would do a default draw of the background. | |
| 22 static interface DrawManager { | |
| 23 public void defaultDraw(Canvas cavas); | |
| 24 } | |
| 25 | |
| 26 CanvasDelegate(DrawManager drawManager, Mode mode) { | |
| 27 mDrawManager = drawManager; | |
| 28 | |
| 29 // DST_IN masks, DST_OUT clips. | |
| 30 mMode = new PorterDuffXfermode(mode); | |
| 31 | |
| 32 mPaint = new Paint(); | |
| 33 mPaint.setAntiAlias(true); | |
| 34 mPaint.setColor(0xFFFF0000); | |
| 35 mPaint.setStrokeWidth(0.0f); | |
| 36 } | |
| 37 | |
| 38 void draw(Canvas canvas, Path path, int width, int height) { | |
| 39 // Save the canvas. All PorterDuff operations should be done in a offscreen bitmap. | |
| 40 int count = canvas.saveLayer(0, 0, width, height, null, | |
| 41 Canvas.MATRIX_SAVE_FLAG | | |
| 42 Canvas.CLIP_SAVE_FLAG | | |
| 43 Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | | |
| 44 Canvas.FULL_COLOR_LAYER_SAVE_FLAG | | |
| 45 Canvas.CLIP_TO_LAYER_SAVE_FLAG); | |
| 46 | |
| 47 // Do a default draw. | |
| 48 mDrawManager.defaultDraw(canvas); | |
| 49 | |
| 50 if (path != null && !path.isEmpty()) { | |
| 51 // ICS added double-buffering, which made it easier for drawing the Path directly over the DST. | |
| 52 // In pre-ICS, drawPath() doesn't seem to use ARGB_8888 mode for performance, hence transparency is not preserved. | |
| 53 if (Build.VERSION.SDK_INT >= 14) { | |
| 54 mPaint.setXfermode(mMode); | |
| 55 canvas.drawPath(path, mPaint); | |
| 56 } else { | |
| 57 // Allocate a bitmap and draw the masking/clipping path. | |
| 58 Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); | |
| 59 (new Canvas(bitmap)).drawPath(path, mPaint); | |
| 60 | |
| 61 mPaint.setXfermode(mMode); | |
| 62 canvas.drawBitmap(bitmap, 0, 0, mPaint); | |
| 63 bitmap.recycle(); | |
| 64 | |
| 65 mPaint.setXfermode(null); | |
| 66 } | |
| 67 } | |
| 68 | |
| 69 // Restore the canvas. | |
| 70 canvas.restoreToCount(count); | |
| 71 } | |
| 72 | |
| 73 void setShader(Shader shader) { | |
| 74 mPaint.setShader(shader); | |
| 75 } | |
| 76 } |
