Ahan Wu | 67e7f10 | 2019-01-14 20:38:14 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 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.systemui.glwallpaper; |
| 18 | |
| 19 | import static android.opengl.GLES20.GL_FLOAT; |
| 20 | import static android.opengl.GLES20.GL_LINEAR; |
| 21 | import static android.opengl.GLES20.GL_TEXTURE0; |
| 22 | import static android.opengl.GLES20.GL_TEXTURE_2D; |
| 23 | import static android.opengl.GLES20.GL_TEXTURE_MAG_FILTER; |
| 24 | import static android.opengl.GLES20.GL_TEXTURE_MIN_FILTER; |
| 25 | import static android.opengl.GLES20.GL_TRIANGLES; |
| 26 | import static android.opengl.GLES20.glActiveTexture; |
| 27 | import static android.opengl.GLES20.glBindTexture; |
| 28 | import static android.opengl.GLES20.glDrawArrays; |
| 29 | import static android.opengl.GLES20.glEnableVertexAttribArray; |
| 30 | import static android.opengl.GLES20.glGenTextures; |
| 31 | import static android.opengl.GLES20.glTexParameteri; |
| 32 | import static android.opengl.GLES20.glUniform1i; |
| 33 | import static android.opengl.GLES20.glVertexAttribPointer; |
| 34 | |
| 35 | import android.graphics.Bitmap; |
| 36 | import android.opengl.GLUtils; |
Ahan Wu | 67e7f10 | 2019-01-14 20:38:14 +0800 | [diff] [blame] | 37 | import android.util.Log; |
| 38 | |
Ahan Wu | e16e1fa | 2019-05-29 18:39:33 +0800 | [diff] [blame] | 39 | import java.io.FileDescriptor; |
| 40 | import java.io.PrintWriter; |
Ahan Wu | 67e7f10 | 2019-01-14 20:38:14 +0800 | [diff] [blame] | 41 | import java.nio.ByteBuffer; |
| 42 | import java.nio.ByteOrder; |
| 43 | import java.nio.FloatBuffer; |
| 44 | |
| 45 | /** |
| 46 | * This class takes charge of the geometry data like vertices and texture coordinates. |
| 47 | * It delivers these data to opengl runtime and triggers draw calls if necessary. |
| 48 | */ |
| 49 | class ImageGLWallpaper { |
| 50 | private static final String TAG = ImageGLWallpaper.class.getSimpleName(); |
| 51 | |
Ahan Wu | 4a29779 | 2020-04-16 03:00:14 +0800 | [diff] [blame] | 52 | private static final String A_POSITION = "aPosition"; |
| 53 | private static final String A_TEXTURE_COORDINATES = "aTextureCoordinates"; |
| 54 | private static final String U_TEXTURE = "uTexture"; |
Ahan Wu | 67e7f10 | 2019-01-14 20:38:14 +0800 | [diff] [blame] | 55 | private static final int POSITION_COMPONENT_COUNT = 2; |
| 56 | private static final int TEXTURE_COMPONENT_COUNT = 2; |
| 57 | private static final int BYTES_PER_FLOAT = 4; |
| 58 | |
| 59 | // Vertices to define the square with 2 triangles. |
| 60 | private static final float[] VERTICES = { |
| 61 | -1.0f, -1.0f, |
| 62 | +1.0f, -1.0f, |
| 63 | +1.0f, +1.0f, |
| 64 | +1.0f, +1.0f, |
| 65 | -1.0f, +1.0f, |
| 66 | -1.0f, -1.0f |
| 67 | }; |
| 68 | |
| 69 | // Texture coordinates that maps to vertices. |
| 70 | private static final float[] TEXTURES = { |
| 71 | 0f, 1f, |
| 72 | 1f, 1f, |
| 73 | 1f, 0f, |
| 74 | 1f, 0f, |
| 75 | 0f, 0f, |
| 76 | 0f, 1f |
| 77 | }; |
| 78 | |
| 79 | private final FloatBuffer mVertexBuffer; |
| 80 | private final FloatBuffer mTextureBuffer; |
| 81 | private final ImageGLProgram mProgram; |
| 82 | |
| 83 | private int mAttrPosition; |
| 84 | private int mAttrTextureCoordinates; |
Ahan Wu | 67e7f10 | 2019-01-14 20:38:14 +0800 | [diff] [blame] | 85 | private int mUniTexture; |
| 86 | private int mTextureId; |
| 87 | |
| 88 | ImageGLWallpaper(ImageGLProgram program) { |
| 89 | mProgram = program; |
| 90 | |
| 91 | // Create an float array in opengles runtime (native) and put vertex data. |
| 92 | mVertexBuffer = ByteBuffer.allocateDirect(VERTICES.length * BYTES_PER_FLOAT) |
| 93 | .order(ByteOrder.nativeOrder()) |
| 94 | .asFloatBuffer(); |
| 95 | mVertexBuffer.put(VERTICES); |
| 96 | mVertexBuffer.position(0); |
| 97 | |
| 98 | // Create an float array in opengles runtime (native) and put texture data. |
| 99 | mTextureBuffer = ByteBuffer.allocateDirect(TEXTURES.length * BYTES_PER_FLOAT) |
| 100 | .order(ByteOrder.nativeOrder()) |
| 101 | .asFloatBuffer(); |
| 102 | mTextureBuffer.put(TEXTURES); |
| 103 | mTextureBuffer.position(0); |
| 104 | } |
| 105 | |
Ahan Wu | 48ebbd7 | 2019-03-12 20:59:13 +0800 | [diff] [blame] | 106 | void setup(Bitmap bitmap) { |
Ahan Wu | 67e7f10 | 2019-01-14 20:38:14 +0800 | [diff] [blame] | 107 | setupAttributes(); |
| 108 | setupUniforms(); |
Ahan Wu | 48ebbd7 | 2019-03-12 20:59:13 +0800 | [diff] [blame] | 109 | setupTexture(bitmap); |
Ahan Wu | 67e7f10 | 2019-01-14 20:38:14 +0800 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | private void setupAttributes() { |
| 113 | mAttrPosition = mProgram.getAttributeHandle(A_POSITION); |
| 114 | mVertexBuffer.position(0); |
| 115 | glVertexAttribPointer(mAttrPosition, POSITION_COMPONENT_COUNT, GL_FLOAT, |
| 116 | false, 0, mVertexBuffer); |
| 117 | glEnableVertexAttribArray(mAttrPosition); |
| 118 | |
| 119 | mAttrTextureCoordinates = mProgram.getAttributeHandle(A_TEXTURE_COORDINATES); |
| 120 | mTextureBuffer.position(0); |
| 121 | glVertexAttribPointer(mAttrTextureCoordinates, TEXTURE_COMPONENT_COUNT, GL_FLOAT, |
| 122 | false, 0, mTextureBuffer); |
| 123 | glEnableVertexAttribArray(mAttrTextureCoordinates); |
| 124 | } |
| 125 | |
| 126 | private void setupUniforms() { |
Ahan Wu | 67e7f10 | 2019-01-14 20:38:14 +0800 | [diff] [blame] | 127 | mUniTexture = mProgram.getUniformHandle(U_TEXTURE); |
| 128 | } |
| 129 | |
Ahan Wu | 67e7f10 | 2019-01-14 20:38:14 +0800 | [diff] [blame] | 130 | void draw() { |
| 131 | glDrawArrays(GL_TRIANGLES, 0, VERTICES.length / 2); |
| 132 | } |
| 133 | |
Ahan Wu | 48ebbd7 | 2019-03-12 20:59:13 +0800 | [diff] [blame] | 134 | private void setupTexture(Bitmap bitmap) { |
Ahan Wu | 67e7f10 | 2019-01-14 20:38:14 +0800 | [diff] [blame] | 135 | final int[] tids = new int[1]; |
| 136 | |
| 137 | if (bitmap == null) { |
| 138 | Log.w(TAG, "setupTexture: invalid bitmap"); |
| 139 | return; |
| 140 | } |
| 141 | |
| 142 | // Generate one texture object and store the id in tids[0]. |
| 143 | glGenTextures(1, tids, 0); |
| 144 | if (tids[0] == 0) { |
| 145 | Log.w(TAG, "setupTexture: glGenTextures() failed"); |
| 146 | return; |
| 147 | } |
| 148 | |
Ahan Wu | 48ebbd7 | 2019-03-12 20:59:13 +0800 | [diff] [blame] | 149 | // Bind a named texture to a target. |
Ahan Wu | 67e7f10 | 2019-01-14 20:38:14 +0800 | [diff] [blame] | 150 | glBindTexture(GL_TEXTURE_2D, tids[0]); |
| 151 | // Load the bitmap data and copy it over into the texture object that is currently bound. |
| 152 | GLUtils.texImage2D(GL_TEXTURE_2D, 0, bitmap, 0); |
| 153 | // Use bilinear texture filtering when minification. |
| 154 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
| 155 | // Use bilinear texture filtering when magnification. |
| 156 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| 157 | |
| 158 | mTextureId = tids[0]; |
| 159 | } |
| 160 | |
| 161 | void useTexture() { |
| 162 | // Set the active texture unit to texture unit 0. |
| 163 | glActiveTexture(GL_TEXTURE0); |
| 164 | // Bind the texture to this unit. |
| 165 | glBindTexture(GL_TEXTURE_2D, mTextureId); |
| 166 | // Let the texture sampler in fragment shader to read form this texture unit. |
| 167 | glUniform1i(mUniTexture, 0); |
| 168 | } |
| 169 | |
Ahan Wu | e16e1fa | 2019-05-29 18:39:33 +0800 | [diff] [blame] | 170 | /** |
Ahan Wu | e16e1fa | 2019-05-29 18:39:33 +0800 | [diff] [blame] | 171 | * Called to dump current state. |
| 172 | * @param prefix prefix. |
| 173 | * @param fd fd. |
| 174 | * @param out out. |
| 175 | * @param args args. |
| 176 | */ |
| 177 | public void dump(String prefix, FileDescriptor fd, PrintWriter out, String[] args) { |
Ahan Wu | e16e1fa | 2019-05-29 18:39:33 +0800 | [diff] [blame] | 178 | } |
Ahan Wu | 67e7f10 | 2019-01-14 20:38:14 +0800 | [diff] [blame] | 179 | } |