Example usage for com.badlogic.gdx.graphics GL20 glAttachShader

Introduction

In this page you can find the example usage for com.badlogic.gdx.graphics GL20 glAttachShader.

Prototype

public void glAttachShader(int program, int shader);

Source Link

Usage

From source file:net.mgsx.game.examples.gpu.utils.ShaderProgramEx.java

License:Apache License

private int linkProgram(int program) {
    GL20 gl = Gdx.gl20;
    if (program == -1)
        return -1;

    gl.glAttachShader(program, vertexShaderHandle);
    gl.glAttachShader(program, fragmentShaderHandle);
    if (geometryShaderHandle >= 0)
        gl.glAttachShader(program, geometryShaderHandle);
    if (tcsHandle >= 0)
        gl.glAttachShader(program, tcsHandle);
    if (tesHandle >= 0)
        gl.glAttachShader(program, tesHandle);

    gl.glLinkProgram(program);//from   www . ja  v  a2 s .c  o  m

    ByteBuffer tmp = ByteBuffer.allocateDirect(4);
    tmp.order(ByteOrder.nativeOrder());
    IntBuffer intbuf = tmp.asIntBuffer();

    gl.glGetProgramiv(program, GL20.GL_LINK_STATUS, intbuf);
    int linked = intbuf.get(0);
    if (linked == 0) {
        // Gdx.gl20.glGetProgramiv(program, GL20.GL_INFO_LOG_LENGTH, intbuf);
        // int infoLogLength = intbuf.get(0);
        // if (infoLogLength > 1) {
        log = Gdx.gl20.glGetProgramInfoLog(program);
        // }
        return -1;
    }

    return program;
}

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