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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.gallery3d.glrenderer;
     18 
     19 
     20 // Texture is a rectangular image which can be drawn on GLCanvas.
     21 // The isOpaque() function gives a hint about whether the texture is opaque,
     22 // so the drawing can be done faster.
     23 //
     24 // This is the current texture hierarchy:
     25 //
     26 // Texture
     27 // -- BasicTexture
     28 //    -- UploadedTexture
     29 //       -- BitmapTexture
     30 //       -- Tile
     31 //
     32 public interface Texture {
     33     public int getWidth();
     34     public int getHeight();
     35     public void draw(GLCanvas canvas, int x, int y);
     36     public void draw(GLCanvas canvas, int x, int y, int w, int h);
     37 }
     38