| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.android.apis.graphics; |
| |
| import android.content.Context; |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapShader; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.Matrix; |
| import android.graphics.Paint; |
| import android.graphics.PorterDuff; |
| import android.graphics.PorterDuffXfermode; |
| import android.graphics.RectF; |
| import android.graphics.Shader; |
| import android.graphics.Xfermode; |
| import android.os.Bundle; |
| import android.view.View; |
| |
| public class Xfermodes extends GraphicsActivity { |
| |
| // create a bitmap with a circle, used for the "dst" image |
| static Bitmap makeDst(int w, int h) { |
| Bitmap bm = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); |
| Canvas c = new Canvas(bm); |
| Paint p = new Paint(Paint.ANTI_ALIAS_FLAG); |
| |
| p.setColor(0xFFFFCC44); |
| c.drawOval(new RectF(0, 0, w*3/4, h*3/4), p); |
| return bm; |
| } |
| |
| // create a bitmap with a rect, used for the "src" image |
| static Bitmap makeSrc(int w, int h) { |
| Bitmap bm = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); |
| Canvas c = new Canvas(bm); |
| Paint p = new Paint(Paint.ANTI_ALIAS_FLAG); |
| |
| p.setColor(0xFF66AAFF); |
| c.drawRect(w/3, h/3, w*19/20, h*19/20, p); |
| return bm; |
| } |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setContentView(new SampleView(this)); |
| } |
| |
| private static class SampleView extends View { |
| private static final int W = 64; |
| private static final int H = 64; |
| private static final int ROW_MAX = 4; // number of samples per row |
| |
| private Bitmap mSrcB; |
| private Bitmap mDstB; |
| private Shader mBG; // background checker-board pattern |
| |
| private static final Xfermode[] sModes = { |
| new PorterDuffXfermode(PorterDuff.Mode.CLEAR), |
| new PorterDuffXfermode(PorterDuff.Mode.SRC), |
| new PorterDuffXfermode(PorterDuff.Mode.DST), |
| new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER), |
| new PorterDuffXfermode(PorterDuff.Mode.DST_OVER), |
| new PorterDuffXfermode(PorterDuff.Mode.SRC_IN), |
| new PorterDuffXfermode(PorterDuff.Mode.DST_IN), |
| new PorterDuffXfermode(PorterDuff.Mode.SRC_OUT), |
| new PorterDuffXfermode(PorterDuff.Mode.DST_OUT), |
| new PorterDuffXfermode(PorterDuff.Mode.SRC_ATOP), |
| new PorterDuffXfermode(PorterDuff.Mode.DST_ATOP), |
| new PorterDuffXfermode(PorterDuff.Mode.XOR), |
| new PorterDuffXfermode(PorterDuff.Mode.DARKEN), |
| new PorterDuffXfermode(PorterDuff.Mode.LIGHTEN), |
| new PorterDuffXfermode(PorterDuff.Mode.MULTIPLY), |
| new PorterDuffXfermode(PorterDuff.Mode.SCREEN) |
| }; |
| |
| private static final String[] sLabels = { |
| "Clear", "Src", "Dst", "SrcOver", |
| "DstOver", "SrcIn", "DstIn", "SrcOut", |
| "DstOut", "SrcATop", "DstATop", "Xor", |
| "Darken", "Lighten", "Multiply", "Screen" |
| }; |
| |
| public SampleView(Context context) { |
| super(context); |
| |
| mSrcB = makeSrc(W, H); |
| mDstB = makeDst(W, H); |
| |
| // make a ckeckerboard pattern |
| Bitmap bm = Bitmap.createBitmap(new int[] { 0xFFFFFFFF, 0xFFCCCCCC, |
| 0xFFCCCCCC, 0xFFFFFFFF }, 2, 2, |
| Bitmap.Config.RGB_565); |
| mBG = new BitmapShader(bm, |
| Shader.TileMode.REPEAT, |
| Shader.TileMode.REPEAT); |
| Matrix m = new Matrix(); |
| m.setScale(6, 6); |
| mBG.setLocalMatrix(m); |
| } |
| |
| @Override protected void onDraw(Canvas canvas) { |
| canvas.drawColor(Color.WHITE); |
| |
| Paint labelP = new Paint(Paint.ANTI_ALIAS_FLAG); |
| labelP.setTextAlign(Paint.Align.CENTER); |
| |
| Paint paint = new Paint(); |
| paint.setFilterBitmap(false); |
| |
| canvas.translate(15, 35); |
| |
| int x = 0; |
| int y = 0; |
| for (int i = 0; i < sModes.length; i++) { |
| // draw the border |
| paint.setStyle(Paint.Style.STROKE); |
| paint.setShader(null); |
| canvas.drawRect(x - 0.5f, y - 0.5f, |
| x + W + 0.5f, y + H + 0.5f, paint); |
| |
| // draw the checker-board pattern |
| paint.setStyle(Paint.Style.FILL); |
| paint.setShader(mBG); |
| canvas.drawRect(x, y, x + W, y + H, paint); |
| |
| // draw the src/dst example into our offscreen bitmap |
| int sc = canvas.saveLayer(x, y, x + W, y + H, null); |
| canvas.translate(x, y); |
| canvas.drawBitmap(mDstB, 0, 0, paint); |
| paint.setXfermode(sModes[i]); |
| canvas.drawBitmap(mSrcB, 0, 0, paint); |
| paint.setXfermode(null); |
| canvas.restoreToCount(sc); |
| |
| // draw the label |
| canvas.drawText(sLabels[i], |
| x + W/2, y - labelP.getTextSize()/2, labelP); |
| |
| x += W + 10; |
| |
| // wrap around when we've drawn enough for one row |
| if ((i % ROW_MAX) == ROW_MAX - 1) { |
| x = 0; |
| y += H + 30; |
| } |
| } |
| } |
| } |
| } |
| |