add bitmap p3 test

Author: dongsen

app/src/main/java/com/test/devilsen/test/bitmap/P3ColorTestActivity.java

@@ -2,19 +2,27 @@
 
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.ColorSpace;
+import android.graphics.ImageDecoder;
+import android.graphics.Paint;
+import android.os.Build;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
 import android.widget.ImageView;
 
 import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
 import androidx.appcompat.app.AppCompatActivity;
 
 import com.test.devilsen.test.R;
 import com.test.devilsen.test.util.BitmapUtil;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
 
 
 public class P3ColorTestActivity extends AppCompatActivity {
@@ -34,19 +42,73 @@ protected void onCreate(@Nullable Bundle savedInstanceState) {
 
         try {
             InputStream open = getResources().getAssets().open("image/Webkit-logo-P3.png");
-            mBitmap = BitmapFactory.decodeStream(open);
+            BitmapFactory.Options options = new BitmapFactory.Options();
+            options.inPreferredConfig = Bitmap.Config.ARGB_8888;
+            mBitmap = BitmapFactory.decodeStream(open, null, options);
+//            String path = "/storage/emulated/0/DCIM/P3/Webkit-logo-P3.png";
+//            mBitmap = BitmapFactory.decodeFile(path, options);
+            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+                ColorSpace colorSpace = mBitmap.getColorSpace();
+                Log.d(TAG, "bitmap color space = " + colorSpace.getName());
+
+                Bitmap.Config config = mBitmap.getConfig();
+                Log.d(TAG, "bitmap config = " + config.toString());
+            }
             beforeIV.setImageBitmap(mBitmap);
         } catch (IOException e) {
             e.printStackTrace();
         }
     }
 
     public void change(View view) {
-        String path = getExternalCacheDir().getAbsolutePath() + "/Webkit-logo-P3-transfer.png";
-        boolean saveImage = BitmapUtil.saveImage(mBitmap, path);
-        Log.d(TAG, "saved = " + saveImage + " path = " + path);
+        int imageSize = mBitmap.getRowBytes() * mBitmap.getHeight();
+        ByteBuffer buffer = ByteBuffer.allocateDirect(imageSize);
+        mBitmap.copyPixelsToBuffer(buffer);
+        buffer.position(0);
+
+        // 0. save directly
+//        String path = saveBitmap(mBitmap);
+//        Bitmap bitmap = BitmapFactory.decodeFile(path);
+//        afterIV.setImageBitmap(bitmap);
+
+        int width = mBitmap.getWidth();
+        int height = mBitmap.getHeight();
+        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+
+        // 1. canvas draw
+//        Canvas canvas = new Canvas(bitmap);
+//        Paint paint = new Paint();
+//        canvas.drawBitmap(mBitmap, 0, 0, paint);
+
+        // 2. use pixels
+        int[] pixels = new int[mBitmap.getWidth() * mBitmap.getHeight()];
+        mBitmap.getPixels(pixels, 0, width, 0, 0, width, height);
+        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
+
+        // 3. use ImageDecoder.Source (need api 28 android 9.0)
+//        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.P) {
+//            ImageDecoder.Source source = ImageDecoder.createSource(getAssets(), "image/Webkit-logo-P3.png");
+//            try {
+//                //使用OnHeaderDecodedListener监听解码信息
+//                bitmap = ImageDecoder.decodeBitmap(source, (decoder, info, source1) ->
+//                        decoder.setTargetColorSpace(ColorSpace.get(ColorSpace.Named.SRGB)));
+//            } catch (IOException e) {
+//                e.printStackTrace();
+//            }
+//        }
+
+        // 4. use buffer(not working for P3)
+//        bitmap.copyPixelsFromBuffer(buffer);
 
-        Bitmap bitmap = BitmapFactory.decodeFile(path);
         afterIV.setImageBitmap(bitmap);
+
+        saveBitmap(bitmap);
+    }
+
+    private String saveBitmap(Bitmap bitmap) {
+        String path = getExternalCacheDir().getAbsolutePath() + "/Webkit-logo-P3-transfer.png";
+        boolean saveImage = BitmapUtil.saveImage(bitmap, path);
+        Log.d(TAG, "saved = " + saveImage + " path = " + path);
+        return path;
     }
 }