| /* |
| * 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.example.android.mediafx; |
| |
| import android.opengl.GLES20; |
| |
| public class GLToolbox { |
| |
| public static int loadShader(int shaderType, String source) { |
| int shader = GLES20.glCreateShader(shaderType); |
| if (shader != 0) { |
| GLES20.glShaderSource(shader, source); |
| GLES20.glCompileShader(shader); |
| int[] compiled = new int[1]; |
| GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0); |
| if (compiled[0] == 0) { |
| String info = GLES20.glGetShaderInfoLog(shader); |
| GLES20.glDeleteShader(shader); |
| shader = 0; |
| throw new RuntimeException("Could not compile shader " + |
| shaderType + ":" + info); |
| } |
| } |
| return shader; |
| } |
| |
| public static int createProgram(String vertexSource, |
| String fragmentSource) { |
| int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource); |
| if (vertexShader == 0) { |
| return 0; |
| } |
| int pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource); |
| if (pixelShader == 0) { |
| return 0; |
| } |
| |
| int program = GLES20.glCreateProgram(); |
| if (program != 0) { |
| GLES20.glAttachShader(program, vertexShader); |
| checkGlError("glAttachShader"); |
| GLES20.glAttachShader(program, pixelShader); |
| checkGlError("glAttachShader"); |
| GLES20.glLinkProgram(program); |
| int[] linkStatus = new int[1]; |
| GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, linkStatus, |
| 0); |
| if (linkStatus[0] != GLES20.GL_TRUE) { |
| String info = GLES20.glGetProgramInfoLog(program); |
| GLES20.glDeleteProgram(program); |
| program = 0; |
| throw new RuntimeException("Could not link program: " + info); |
| } |
| } |
| return program; |
| } |
| |
| public static void checkGlError(String op) { |
| int error; |
| while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) { |
| throw new RuntimeException(op + ": glError " + error); |
| } |
| } |
| |
| public static void initTexParams() { |
| GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, |
| GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR); |
| GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, |
| GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR); |
| GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, |
| GLES20.GL_CLAMP_TO_EDGE); |
| GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, |
| GLES20.GL_CLAMP_TO_EDGE); |
| } |
| |
| } |