175 lines
6.1 KiB
Java
175 lines
6.1 KiB
Java
/*
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* Copyright (C) 2021 pedroSG94.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.pedro.encoder.utils.gl;
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import android.content.Context;
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import android.content.res.Resources;
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import android.graphics.Bitmap;
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import android.graphics.Matrix;
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import android.opengl.EGL14;
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import android.opengl.GLES11Ext;
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import android.opengl.GLES20;
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import android.os.Build;
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import android.util.Log;
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import androidx.annotation.RequiresApi;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.ByteBuffer;
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/**
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* Created by pedro on 9/09/17.
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*/
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@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
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public class GlUtil {
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private static final String TAG = "GlUtil";
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public static int loadShader(int shaderType, String source) {
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int shader = GLES20.glCreateShader(shaderType);
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checkGlError("glCreateShader type=" + shaderType);
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GLES20.glShaderSource(shader, source);
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GLES20.glCompileShader(shader);
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int[] compiled = new int[1];
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GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
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if (compiled[0] == 0) {
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Log.e(TAG, "Could not compile shader " + shaderType + ":");
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Log.e(TAG, " " + GLES20.glGetShaderInfoLog(shader));
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GLES20.glDeleteShader(shader);
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shader = 0;
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}
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return shader;
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}
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public static int createProgram(String vertexSource, String fragmentSource) {
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int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource);
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if (vertexShader == 0) {
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return 0;
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}
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int pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource);
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if (pixelShader == 0) {
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return 0;
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}
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int program = GLES20.glCreateProgram();
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checkGlError("glCreateProgram");
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if (program == 0) {
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Log.e(TAG, "Could not create program");
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}
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GLES20.glAttachShader(program, vertexShader);
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checkGlError("glAttachShader");
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GLES20.glAttachShader(program, pixelShader);
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checkGlError("glAttachShader");
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GLES20.glLinkProgram(program);
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int[] linkStatus = new int[1];
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GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, linkStatus, 0);
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if (linkStatus[0] != GLES20.GL_TRUE) {
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Log.e(TAG, "Could not link program: ");
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Log.e(TAG, GLES20.glGetProgramInfoLog(program));
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GLES20.glDeleteProgram(program);
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program = 0;
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}
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return program;
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}
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public static void createTextures(int quantity, int[] texturesId, int offset) {
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GLES20.glGenTextures(quantity, texturesId, offset);
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for (int i = offset; i < quantity; i++) {
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GLES20.glActiveTexture(GLES20.GL_TEXTURE0 + i);
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GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, texturesId[i]);
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GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
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GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
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GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S,
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GLES20.GL_CLAMP_TO_EDGE);
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GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T,
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GLES20.GL_CLAMP_TO_EDGE);
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}
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}
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public static void createExternalTextures(int quantity, int[] texturesId, int offset) {
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GLES20.glGenTextures(quantity, texturesId, offset);
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for (int i = offset; i < quantity; i++) {
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GLES20.glActiveTexture(GLES20.GL_TEXTURE0 + i);
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GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, texturesId[i]);
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GLES20.glTexParameterf(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MIN_FILTER,
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GLES20.GL_LINEAR);
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GLES20.glTexParameterf(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MAG_FILTER,
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GLES20.GL_LINEAR);
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GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_S,
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GLES20.GL_CLAMP_TO_EDGE);
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GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_T,
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GLES20.GL_CLAMP_TO_EDGE);
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}
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}
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public static String getStringFromRaw(Context context, int id) {
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String str;
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try {
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Resources r = context.getResources();
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InputStream is = r.openRawResource(id);
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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int i = is.read();
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while (i != -1) {
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baos.write(i);
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i = is.read();
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}
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str = baos.toString();
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is.close();
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} catch (IOException e) {
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str = "";
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}
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return str;
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}
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public static void checkGlError(String op) {
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int error = GLES20.glGetError();
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if (error != GLES20.GL_NO_ERROR) {
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throw new RuntimeException(op + ". GL error: " + error);
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}
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}
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public static void checkEglError(String msg) {
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int error = EGL14.eglGetError();
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if (error != EGL14.EGL_SUCCESS) {
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throw new RuntimeException(msg + ". EGL error: " + error);
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}
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}
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public static Bitmap getBitmap(int streamWidth, int streamHeight) {
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//Get opengl buffer
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ByteBuffer buffer = ByteBuffer.allocateDirect(streamWidth * streamHeight * 4);
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GLES20.glReadPixels(0, 0, streamWidth, streamHeight, GLES20.GL_RGBA,
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GLES20.GL_UNSIGNED_BYTE, buffer);
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//Create bitmap preview resolution
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Bitmap bitmap = Bitmap.createBitmap(streamWidth, streamHeight, Bitmap.Config.ARGB_8888);
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//Set buffer to bitmap
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bitmap.copyPixelsFromBuffer(buffer);
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//Scale to stream resolution
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//Flip vertical
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return flipVerticalBitmap(bitmap, streamWidth, streamHeight);
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}
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private static Bitmap flipVerticalBitmap(Bitmap bitmap, int width, int height) {
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float cx = width / 2f;
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float cy = height / 2f;
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Matrix matrix = new Matrix();
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matrix.postScale(1f, -1f, cx, cy);
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return Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);
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}
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}
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