1 /* 2 * Copyright (C) 2012 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 // ExtTexture is a texture whose content comes from a external texture. 20 // Before drawing, setSize() should be called. 21 public class ExtTexture extends BasicTexture { 22 23 private int mTarget; 24 ExtTexture(GLCanvas canvas, int target)25 public ExtTexture(GLCanvas canvas, int target) { 26 GLId glId = canvas.getGLId(); 27 mId = glId.generateTexture(); 28 mTarget = target; 29 } 30 uploadToCanvas(GLCanvas canvas)31 private void uploadToCanvas(GLCanvas canvas) { 32 canvas.setTextureParameters(this); 33 setAssociatedCanvas(canvas); 34 mState = STATE_LOADED; 35 } 36 37 @Override onBind(GLCanvas canvas)38 protected boolean onBind(GLCanvas canvas) { 39 if (!isLoaded()) { 40 uploadToCanvas(canvas); 41 } 42 43 return true; 44 } 45 46 @Override getTarget()47 public int getTarget() { 48 return mTarget; 49 } 50 51 @Override isOpaque()52 public boolean isOpaque() { 53 return true; 54 } 55 56 @Override yield()57 public void yield() { 58 // we cannot free the texture because we have no backup. 59 } 60 } 61