1 /* 2 * Copyright (C) 2011 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 androidx.media.filterpacks.transform; 18 19 import androidx.media.filterfw.Frame; 20 import androidx.media.filterfw.FrameImage2D; 21 import androidx.media.filterfw.FrameType; 22 import androidx.media.filterfw.TextureSource; 23 24 import java.util.Arrays; 25 26 /** Internal class that contains utility functions used by the transform filters. **/ 27 class TransformUtils { 28 29 public static int powOf2(int x) { 30 --x; 31 // Fill with 1s 32 x |= x >> 1; 33 x |= x >> 2; 34 x |= x >> 4; 35 x |= x >> 8; 36 x |= x >> 16; 37 // Next int is now pow-of-2 38 return x + 1; 39 } 40 41 public static FrameImage2D makeMipMappedFrame(FrameImage2D current, int[] dimensions) { 42 // Note: Future versions of GLES will support NPOT mipmapping. When these become more 43 // widely used, we can add a check here to disable frame expansion on such devices. 44 int[] pow2Dims = new int[] { powOf2(dimensions[0]), powOf2(dimensions[1]) }; 45 if (current == null) { 46 FrameType imageType = FrameType.image2D(FrameType.ELEMENT_RGBA8888, 47 FrameType.READ_GPU | FrameType.WRITE_GPU); 48 current = Frame.create(imageType, pow2Dims).asFrameImage2D(); 49 } else if (!Arrays.equals(dimensions, current.getDimensions())) { 50 current.resize(pow2Dims); 51 } 52 return current; 53 } 54 55 public static FrameImage2D makeTempFrame(FrameImage2D current, int[] dimensions) { 56 if (current == null) { 57 FrameType imageType = FrameType.image2D(FrameType.ELEMENT_RGBA8888, 58 FrameType.READ_GPU | FrameType.WRITE_GPU); 59 current = Frame.create(imageType, dimensions).asFrameImage2D(); 60 } else if (!Arrays.equals(dimensions, current.getDimensions())) { 61 current.resize(dimensions); 62 } 63 return current; 64 } 65 66 public static void generateMipMaps(FrameImage2D frame) { 67 TextureSource texture = frame.lockTextureSource(); 68 texture.generateMipmaps(); 69 frame.unlock(); 70 } 71 72 public static void setTextureParameter(FrameImage2D frame, int param, int value) { 73 TextureSource texture = frame.lockTextureSource(); 74 texture.setParameter(param, value); 75 frame.unlock(); 76 } 77 78 } 79
