opengl Create and compile a shader. - Android android.opengl

Android examples for android.opengl:OpenGL Shader

  1. HOME
  2. Android
  3. android.opengl
  4. OpenGL Shader

Description

opengl Create and compile a shader.

Demo Code

/*/*  w  w  w .java  2  s.com*/
 * Copyright 2014 Google Inc. All Rights Reserved.

 * 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.java2s;

import android.opengl.GLES20;
import android.util.Log;

public class Main {
    private static final String TAG = "ShaderHelper";

    /**
     * Create and compile a shader.
     *
     * @param shaderType   The shader type.
     * @param shaderCode The shader source code.
     * @return An OpenGL handle to the shader.
     */
    public static int compileShader(int shaderType, String shaderCode) {
        int shaderHandle = GLES20.glCreateShader(shaderType);

        if (shaderHandle != 0) {
            // Pass in the shader source.
            GLES20.glShaderSource(shaderHandle, shaderCode);

            // Compile the shader.
            GLES20.glCompileShader(shaderHandle);

            // Get the compilation status.
            final int[] compileStatus = new int[1];
            GLES20.glGetShaderiv(shaderHandle, GLES20.GL_COMPILE_STATUS,
                    compileStatus, 0);

            // If the compilation failed, delete the shader.
            if (compileStatus[0] == 0) {
                Log.e(TAG,
                        "Error compiling shader: "
                                + GLES20.glGetShaderInfoLog(shaderHandle));
                GLES20.glDeleteShader(shaderHandle);
                shaderHandle = 0;
            }
        }

        if (shaderHandle == 0) {
            throw new RuntimeException("Error creating shader.");
        }

        return shaderHandle;
    }
}

Related Tutorials