lib/gamnit/android19.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 # Variation using features from Android API 19
  16 #
  17 # Add support for `TextureAsset::premultiply_alpha = false` on Android.
  18 module android19 is
  19         android_api_min 19
  20         android_api_target 22
  21 end
  22
  23 import android
  24 intrude import display_android
  25 intrude import gamnit_android
  26 intrude import android::load_image
  27
  28 in "Java" `{
  29         import android.graphics.Bitmap;
  30         import android.graphics.BitmapFactory;
  31 `}
  32
  33 redef class TextureAsset
  34
  35         redef fun load_bitmap(asset_manager, path)
  36         do
  37                 var stream = asset_manager.native_assets_manager.open(path.to_java_string)
  38                 return new NativeBitmap.from_stream_ex(stream, premultiply_alpha)
  39         end
  40 end
  41
  42 redef class NativeCByteArray
  43
  44         # The data was not premultiplied, don't unmultiply it
  45         redef fun unmultiply(w, h) do end
  46 end
  47
  48 redef class NativeBitmap
  49
  50         # Load from `input_stream` with optional `premultiply_alpha`
  51         new from_stream_ex(input_stream: NativeInputStream, premultiply_alpha: Bool) in "Java" `{
  52                 BitmapFactory.Options opts = new BitmapFactory.Options();
  53                 opts.inPremultiplied = premultiply_alpha; // API 19
  54                 return BitmapFactory.decodeStream(input_stream, null, opts);
  55         `}
  56 end