auto import from //depot/cupcake/@135843

1 files changed, 130 insertions, 0 deletions

diff --git a/samples/ApiDemos/src/com/example/android/apis/graphics/CreateBitmap.java b/samples/ApiDemos/src/com/example/android/apis/graphics/CreateBitmap.java
new file mode 100644
index 000000000..e3e5d9ae3
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+++ b/samples/ApiDemos/src/com/example/android/apis/graphics/CreateBitmap.java
@@ -0,0 +1,130 @@
+/*
+ * 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 com.example.android.apis.R;
+
+import android.app.Activity;
+import android.content.Context;
+import android.graphics.*;
+import android.os.Bundle;
+import android.view.KeyEvent;
+import android.view.*;
+
+import java.io.ByteArrayOutputStream;
+
+public class CreateBitmap extends GraphicsActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(new SampleView(this));
+    }
+    
+    private static final int WIDTH = 50;
+    private static final int HEIGHT = 50;
+    private static final int STRIDE = 64;   // must be >= WIDTH
+    
+    private static int[] createColors() {
+        int[] colors = new int[STRIDE * HEIGHT];
+        for (int y = 0; y < HEIGHT; y++) {
+            for (int x = 0; x < WIDTH; x++) {
+                int r = x * 255 / (WIDTH - 1);
+                int g = y * 255 / (HEIGHT - 1);
+                int b = 255 - Math.min(r, g);
+                int a = Math.max(r, g);
+                colors[y * STRIDE + x] = (a << 24) | (r << 16) | (g << 8) | b;
+            }
+        }
+        return colors;
+    }
+        
+    private static class SampleView extends View {
+        private Bitmap[] mBitmaps;
+        private Bitmap[] mJPEG;
+        private Bitmap[] mPNG;
+        private int[]    mColors;
+        private Paint    mPaint;
+        
+        private static Bitmap codec(Bitmap src, Bitmap.CompressFormat format,
+                                    int quality) {
+            ByteArrayOutputStream os = new ByteArrayOutputStream();
+            src.compress(format, quality, os);            
+
+            byte[] array = os.toByteArray();
+            return BitmapFactory.decodeByteArray(array, 0, array.length);
+        }
+
+        public SampleView(Context context) {
+            super(context);
+            setFocusable(true);
+            
+            mColors = createColors();
+            int[] colors = mColors;
+
+            mBitmaps = new Bitmap[6];
+            // these three are initialized with colors[]
+            mBitmaps[0] = Bitmap.createBitmap(colors, 0, STRIDE, WIDTH, HEIGHT,
+                                              Bitmap.Config.ARGB_8888);
+            mBitmaps[1] = Bitmap.createBitmap(colors, 0, STRIDE, WIDTH, HEIGHT,
+                                              Bitmap.Config.RGB_565);
+            mBitmaps[2] = Bitmap.createBitmap(colors, 0, STRIDE, WIDTH, HEIGHT,
+                                              Bitmap.Config.ARGB_4444);
+            
+            // these three will have their colors set later
+            mBitmaps[3] = Bitmap.createBitmap(WIDTH, HEIGHT,
+                                              Bitmap.Config.ARGB_8888);
+            mBitmaps[4] = Bitmap.createBitmap(WIDTH, HEIGHT,
+                                              Bitmap.Config.RGB_565);
+            mBitmaps[5] = Bitmap.createBitmap(WIDTH, HEIGHT,
+                                              Bitmap.Config.ARGB_4444);
+            for (int i = 3; i <= 5; i++) {
+                mBitmaps[i].setPixels(colors, 0, STRIDE, 0, 0, WIDTH, HEIGHT);
+            }
+            
+            mPaint = new Paint();
+            mPaint.setDither(true);
+            
+            // now encode/decode using JPEG and PNG
+            mJPEG = new Bitmap[mBitmaps.length];
+            mPNG = new Bitmap[mBitmaps.length];
+            for (int i = 0; i < mBitmaps.length; i++) {
+                mJPEG[i] = codec(mBitmaps[i], Bitmap.CompressFormat.JPEG, 80);
+                mPNG[i] = codec(mBitmaps[i], Bitmap.CompressFormat.PNG, 0);
+            }
+        }
+        
+        @Override protected void onDraw(Canvas canvas) {
+            canvas.drawColor(Color.WHITE);
+
+            for (int i = 0; i < mBitmaps.length; i++) {
+                canvas.drawBitmap(mBitmaps[i], 0, 0, null);
+                canvas.drawBitmap(mJPEG[i], 80, 0, null);
+                canvas.drawBitmap(mPNG[i], 160, 0, null);
+                canvas.translate(0, mBitmaps[i].getHeight());
+            }
+            
+            // draw the color array directly, w/o craeting a bitmap object
+            canvas.drawBitmap(mColors, 0, STRIDE, 0, 0, WIDTH, HEIGHT,
+                              true, null);
+            canvas.translate(0, HEIGHT);
+            canvas.drawBitmap(mColors, 0, STRIDE, 0, 0, WIDTH, HEIGHT,
+                              false, mPaint);
+        }
+    }
+}
+