Example usage for org.lwjgl.opengl GL20 nglShaderSource

Introduction

In this page you can find the example usage for org.lwjgl.opengl GL20 nglShaderSource.

Prototype

public static void nglShaderSource(int shader, int count, long strings, long length) 

Source Link

Document

Unsafe version of: #glShaderSource ShaderSource

Usage

From source file:com.samrj.devil.gl.Shader.java

/**
 * Loads shader sources from the given input stream and then compiles this
 * shader. Buffers the source in native memory.
 * //from  w ww  .  j a v  a  2s . c o m
 * @param in The input stream to load sources from.
 * @return This shader.
 * @throws IOException If an I/O error occurs.
 */
public Shader source(InputStream in) throws IOException {
    if (state != State.NEW)
        throw new IllegalStateException("Shader must be new.");

    //Source to memory
    int sourceLength = in.available();
    Memory sourceBlock = new Memory(sourceLength);
    ByteBuffer sourceBuffer = sourceBlock.buffer;
    for (int i = 0; i < sourceLength; i++)
        sourceBuffer.put((byte) in.read());

    //Pointer to pointer to memory
    long pointer = MemStack.wrapl(sourceBlock.address);

    //Pointer to length of memory
    long length = MemStack.wrapi(sourceLength);

    //Load shader source
    GL20.nglShaderSource(id, 1, pointer, length);

    //Free allocated memory
    MemStack.pop(2);
    sourceBlock.free();

    //Compile
    GL20.glCompileShader(id);

    //Check for errors
    if (GL20.glGetShaderi(id, GL20.GL_COMPILE_STATUS) != GL11.GL_TRUE) {
        int logLength = GL20.glGetShaderi(id, GL20.GL_INFO_LOG_LENGTH);
        String log = GL20.glGetShaderInfoLog(id, logLength);
        throw new ShaderException(path != null ? path + " " + log : log);
    }

    state = State.COMPILED;
    return this;
}

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