content: /*
   * Copyright (C) 2011 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 android.filterfw.format;
  
  import android.annotation.UnsupportedAppUsage;
  import android.filterfw.core.FrameFormat;
  import android.filterfw.core.MutableFrameFormat;
  import android.graphics.Bitmap;
  
  /**
   * @hide
   */
  public class ImageFormat {
  
      public static final String COLORSPACE_KEY = "colorspace";
  
      public static final int COLORSPACE_GRAY  = 1;
      public static final int COLORSPACE_RGB   = 2;
      public static final int COLORSPACE_RGBA  = 3;
      public static final int COLORSPACE_YUV   = 4;
  
      public static MutableFrameFormat create(int width,
                                              int height,
                                              int colorspace,
                                              int bytesPerSample,
                                              int target) {
          MutableFrameFormat result = new MutableFrameFormat(FrameFormat.TYPE_BYTE, target);
          result.setDimensions(width, height);
          result.setBytesPerSample(bytesPerSample);
          result.setMetaValue(COLORSPACE_KEY, colorspace);
          if (target == FrameFormat.TARGET_SIMPLE) {
              result.setObjectClass(Bitmap.class);
          }
          return result;
      }
  
      @UnsupportedAppUsage
      public static MutableFrameFormat create(int width,
                                              int height,
                                              int colorspace,
                                              int target) {
          return create(width,
                        height,
                        colorspace,
                        bytesPerSampleForColorspace(colorspace),
                        target);
      }
  
      @UnsupportedAppUsage
      public static MutableFrameFormat create(int colorspace, int target) {
          return create(FrameFormat.SIZE_UNSPECIFIED,
                        FrameFormat.SIZE_UNSPECIFIED,
                        colorspace,
                        bytesPerSampleForColorspace(colorspace),
                        target);
      }
  
      @UnsupportedAppUsage
      public static MutableFrameFormat create(int colorspace) {
          return create(FrameFormat.SIZE_UNSPECIFIED,
                        FrameFormat.SIZE_UNSPECIFIED,
                        colorspace,
                        bytesPerSampleForColorspace(colorspace),
                        FrameFormat.TARGET_UNSPECIFIED);
      }
  
      public static int bytesPerSampleForColorspace(int colorspace) {
          switch (colorspace) {
              case COLORSPACE_GRAY:
                  return 1;
              case COLORSPACE_RGB:
                  return 3;
              case COLORSPACE_RGBA:
                  return 4;
              case COLORSPACE_YUV:
                  return 3;
              default:
                  throw new RuntimeException("Unknown colorspace id " + colorspace + "!");
          }
      }
  }
  