| /* |
| * Copyright (C) 2012 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 com.android.gallery3d.ui; |
| |
| import javax.microedition.khronos.opengles.GL11; |
| import javax.microedition.khronos.opengles.GL11Ext; |
| |
| // ExtTexture is a texture whose content comes from a external texture. |
| // Before drawing, setSize() should be called. |
| public class ExtTexture extends BasicTexture { |
| |
| private static int[] sTextureId = new int[1]; |
| private static float[] sCropRect = new float[4]; |
| private int mTarget; |
| |
| public ExtTexture(int target) { |
| GLId.glGenTextures(1, sTextureId, 0); |
| mId = sTextureId[0]; |
| mTarget = target; |
| } |
| |
| private void uploadToCanvas(GLCanvas canvas) { |
| GL11 gl = canvas.getGLInstance(); |
| |
| int width = getWidth(); |
| int height = getHeight(); |
| // Define a vertically flipped crop rectangle for OES_draw_texture. |
| // The four values in sCropRect are: left, bottom, width, and |
| // height. Negative value of width or height means flip. |
| sCropRect[0] = 0; |
| sCropRect[1] = height; |
| sCropRect[2] = width; |
| sCropRect[3] = -height; |
| |
| // Set texture parameters. |
| gl.glBindTexture(mTarget, mId); |
| gl.glTexParameterfv(mTarget, |
| GL11Ext.GL_TEXTURE_CROP_RECT_OES, sCropRect, 0); |
| gl.glTexParameteri(mTarget, |
| GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP_TO_EDGE); |
| gl.glTexParameteri(mTarget, |
| GL11.GL_TEXTURE_WRAP_T, GL11.GL_CLAMP_TO_EDGE); |
| gl.glTexParameterf(mTarget, |
| GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR); |
| gl.glTexParameterf(mTarget, |
| GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR); |
| |
| setAssociatedCanvas(canvas); |
| mState = STATE_LOADED; |
| } |
| |
| @Override |
| protected boolean onBind(GLCanvas canvas) { |
| if (!isLoaded()) { |
| uploadToCanvas(canvas); |
| } |
| |
| return true; |
| } |
| |
| @Override |
| public int getTarget() { |
| return mTarget; |
| } |
| |
| public boolean isOpaque() { |
| return true; |
| } |
| |
| @Override |
| public void yield() { |
| // we cannot free the texture because we have no backup. |
| } |
| } |