| /* |
| * Copyright (C) 2019 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.systemui.glwallpaper; |
| |
| import static android.opengl.GLES20.GL_FLOAT; |
| import static android.opengl.GLES20.GL_LINEAR; |
| import static android.opengl.GLES20.GL_TEXTURE0; |
| import static android.opengl.GLES20.GL_TEXTURE_2D; |
| import static android.opengl.GLES20.GL_TEXTURE_MAG_FILTER; |
| import static android.opengl.GLES20.GL_TEXTURE_MIN_FILTER; |
| import static android.opengl.GLES20.GL_TRIANGLES; |
| import static android.opengl.GLES20.glActiveTexture; |
| import static android.opengl.GLES20.glBindTexture; |
| import static android.opengl.GLES20.glDrawArrays; |
| import static android.opengl.GLES20.glEnableVertexAttribArray; |
| import static android.opengl.GLES20.glGenTextures; |
| import static android.opengl.GLES20.glTexParameteri; |
| import static android.opengl.GLES20.glUniform1i; |
| import static android.opengl.GLES20.glVertexAttribPointer; |
| |
| import android.graphics.Bitmap; |
| import android.opengl.GLUtils; |
| import android.util.Log; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.nio.FloatBuffer; |
| |
| /** |
| * This class takes charge of the geometry data like vertices and texture coordinates. |
| * It delivers these data to opengl runtime and triggers draw calls if necessary. |
| */ |
| class ImageGLWallpaper { |
| private static final String TAG = ImageGLWallpaper.class.getSimpleName(); |
| |
| private static final String A_POSITION = "aPosition"; |
| private static final String A_TEXTURE_COORDINATES = "aTextureCoordinates"; |
| private static final String U_TEXTURE = "uTexture"; |
| private static final int POSITION_COMPONENT_COUNT = 2; |
| private static final int TEXTURE_COMPONENT_COUNT = 2; |
| private static final int BYTES_PER_FLOAT = 4; |
| |
| // Vertices to define the square with 2 triangles. |
| private static final float[] VERTICES = { |
| -1.0f, -1.0f, |
| +1.0f, -1.0f, |
| +1.0f, +1.0f, |
| +1.0f, +1.0f, |
| -1.0f, +1.0f, |
| -1.0f, -1.0f |
| }; |
| |
| // Texture coordinates that maps to vertices. |
| private static final float[] TEXTURES = { |
| 0f, 1f, |
| 1f, 1f, |
| 1f, 0f, |
| 1f, 0f, |
| 0f, 0f, |
| 0f, 1f |
| }; |
| |
| private final FloatBuffer mVertexBuffer; |
| private final FloatBuffer mTextureBuffer; |
| private final ImageGLProgram mProgram; |
| |
| private int mAttrPosition; |
| private int mAttrTextureCoordinates; |
| private int mUniTexture; |
| private int mTextureId; |
| |
| ImageGLWallpaper(ImageGLProgram program) { |
| mProgram = program; |
| |
| // Create an float array in opengles runtime (native) and put vertex data. |
| mVertexBuffer = ByteBuffer.allocateDirect(VERTICES.length * BYTES_PER_FLOAT) |
| .order(ByteOrder.nativeOrder()) |
| .asFloatBuffer(); |
| mVertexBuffer.put(VERTICES); |
| mVertexBuffer.position(0); |
| |
| // Create an float array in opengles runtime (native) and put texture data. |
| mTextureBuffer = ByteBuffer.allocateDirect(TEXTURES.length * BYTES_PER_FLOAT) |
| .order(ByteOrder.nativeOrder()) |
| .asFloatBuffer(); |
| mTextureBuffer.put(TEXTURES); |
| mTextureBuffer.position(0); |
| } |
| |
| void setup(Bitmap bitmap) { |
| setupAttributes(); |
| setupUniforms(); |
| setupTexture(bitmap); |
| } |
| |
| private void setupAttributes() { |
| mAttrPosition = mProgram.getAttributeHandle(A_POSITION); |
| mVertexBuffer.position(0); |
| glVertexAttribPointer(mAttrPosition, POSITION_COMPONENT_COUNT, GL_FLOAT, |
| false, 0, mVertexBuffer); |
| glEnableVertexAttribArray(mAttrPosition); |
| |
| mAttrTextureCoordinates = mProgram.getAttributeHandle(A_TEXTURE_COORDINATES); |
| mTextureBuffer.position(0); |
| glVertexAttribPointer(mAttrTextureCoordinates, TEXTURE_COMPONENT_COUNT, GL_FLOAT, |
| false, 0, mTextureBuffer); |
| glEnableVertexAttribArray(mAttrTextureCoordinates); |
| } |
| |
| private void setupUniforms() { |
| mUniTexture = mProgram.getUniformHandle(U_TEXTURE); |
| } |
| |
| void draw() { |
| glDrawArrays(GL_TRIANGLES, 0, VERTICES.length / 2); |
| } |
| |
| private void setupTexture(Bitmap bitmap) { |
| final int[] tids = new int[1]; |
| |
| if (bitmap == null || bitmap.isRecycled()) { |
| Log.w(TAG, "setupTexture: invalid bitmap"); |
| return; |
| } |
| |
| // Generate one texture object and store the id in tids[0]. |
| glGenTextures(1, tids, 0); |
| if (tids[0] == 0) { |
| Log.w(TAG, "setupTexture: glGenTextures() failed"); |
| return; |
| } |
| |
| try { |
| // Bind a named texture to a target. |
| glBindTexture(GL_TEXTURE_2D, tids[0]); |
| // Load the bitmap data and copy it over into the texture object |
| // that is currently bound. |
| GLUtils.texImage2D(GL_TEXTURE_2D, 0, bitmap, 0); |
| // Use bilinear texture filtering when minification. |
| glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
| // Use bilinear texture filtering when magnification. |
| glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| mTextureId = tids[0]; |
| } catch (IllegalArgumentException e) { |
| Log.w(TAG, "Failed uploading texture: " + e.getLocalizedMessage()); |
| } |
| } |
| |
| void useTexture() { |
| // Set the active texture unit to texture unit 0. |
| glActiveTexture(GL_TEXTURE0); |
| // Bind the texture to this unit. |
| glBindTexture(GL_TEXTURE_2D, mTextureId); |
| // Let the texture sampler in fragment shader to read form this texture unit. |
| glUniform1i(mUniTexture, 0); |
| } |
| |
| /** |
| * Called to dump current state. |
| * @param prefix prefix. |
| * @param fd fd. |
| * @param out out. |
| * @param args args. |
| */ |
| public void dump(String prefix, FileDescriptor fd, PrintWriter out, String[] args) { |
| } |
| } |