gecko/mobile/android/base/toolbar/CanvasDelegate.java
Lucas Rocha f60d2fd5dd Bug 937641 - Move toolbar-related classes to the toolbar package (r=sriram)
--HG--
rename : mobile/android/base/AutocompleteHandler.java => mobile/android/base/toolbar/AutocompleteHandler.java
rename : mobile/android/base/BackButton.java => mobile/android/base/toolbar/BackButton.java
rename : mobile/android/base/BrowserToolbar.java => mobile/android/base/toolbar/BrowserToolbar.java
rename : mobile/android/base/BrowserToolbarBackground.java => mobile/android/base/toolbar/BrowserToolbarBackground.java
rename : mobile/android/base/CanvasDelegate.java => mobile/android/base/toolbar/CanvasDelegate.java
rename : mobile/android/base/ForwardButton.java => mobile/android/base/toolbar/ForwardButton.java
rename : mobile/android/base/PageActionLayout.java => mobile/android/base/toolbar/PageActionLayout.java
rename : mobile/android/base/ShapedButton.java => mobile/android/base/toolbar/ShapedButton.java
rename : mobile/android/base/TabCounter.java => mobile/android/base/toolbar/TabCounter.java
2013-11-19 15:46:48 +00:00

77 lines
2.7 KiB
Java

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.toolbar;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Shader;
import android.os.Build;
public class CanvasDelegate {
Paint mPaint;
PorterDuffXfermode mMode;
DrawManager mDrawManager;
// DrawManager would do a default draw of the background.
public static interface DrawManager {
public void defaultDraw(Canvas cavas);
}
public CanvasDelegate(DrawManager drawManager, Mode mode) {
mDrawManager = drawManager;
// DST_IN masks, DST_OUT clips.
mMode = new PorterDuffXfermode(mode);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setColor(0xFFFF0000);
mPaint.setStrokeWidth(0.0f);
}
public void draw(Canvas canvas, Path path, int width, int height) {
// Save the canvas. All PorterDuff operations should be done in a offscreen bitmap.
int count = canvas.saveLayer(0, 0, width, height, null,
Canvas.MATRIX_SAVE_FLAG |
Canvas.CLIP_SAVE_FLAG |
Canvas.HAS_ALPHA_LAYER_SAVE_FLAG |
Canvas.FULL_COLOR_LAYER_SAVE_FLAG |
Canvas.CLIP_TO_LAYER_SAVE_FLAG);
// Do a default draw.
mDrawManager.defaultDraw(canvas);
if (path != null && !path.isEmpty()) {
// ICS added double-buffering, which made it easier for drawing the Path directly over the DST.
// In pre-ICS, drawPath() doesn't seem to use ARGB_8888 mode for performance, hence transparency is not preserved.
if (Build.VERSION.SDK_INT >= 14) {
mPaint.setXfermode(mMode);
canvas.drawPath(path, mPaint);
} else {
// Allocate a bitmap and draw the masking/clipping path.
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
(new Canvas(bitmap)).drawPath(path, mPaint);
mPaint.setXfermode(mMode);
canvas.drawBitmap(bitmap, 0, 0, mPaint);
bitmap.recycle();
mPaint.setXfermode(null);
}
}
// Restore the canvas.
canvas.restoreToCount(count);
}
public void setShader(Shader shader) {
mPaint.setShader(shader);
}
}