//drawRectangleRepeated(int x, int y, float u, float v, float uMax, float vMax, int width, int height, int tileWidth, int tileHeight, int zLevel)
loadShaders();
glUseProgram(program);
glUniform1i(texLocation, 0);
glUniform2f(iconOffsetLocation, u, v);
glUniform2f(iconSizeLocation, uMax - u, vMax - v);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
drawRectangleStretched(x, y, 0, 0, width, height, 2F, 2F, zLevel);
glUseProgram(0);

private static int fragShader, texLocation, iconOffsetLocation, iconSizeLocation = 0;

private static int program = 0;

public static void loadShaders()
{
if (program == 0)
    try
    {
        program = glCreateProgram();
        fragShader = createShader(new ResourceLocation("malisiscore", "shaders/repeat_frag.glsl"), GL_FRAGMENT_SHADER);
        glAttachShader(program, fragShader);
        glLinkProgram(program);
        glValidateProgram(program);
        texLocation = glGetUniformLocation(program, "tex");
        iconOffsetLocation = glGetUniformLocation(program, "iconOffset");
        iconSizeLocation = glGetUniformLocation(program, "iconSize");
        IntBuffer iVal = BufferUtils.createIntBuffer(1);
        glGetProgram(program, GL_INFO_LOG_LENGTH, iVal);

        int length = iVal.get();
        if (length > 1)
        {
            System.err.println("true");
        }
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}

private static int createShader(ResourceLocation file, int shaderType) throws Exception
{
int shader = 0;
try
{
    shader = glCreateShader(shaderType);

    if (shader == 0)
        return 0;

    glShaderSource(shader, readFileAsString(getMC().getResourceManager().getResource(file).getInputStream()));
    glCompileShader(shader);

    return shader;
}
catch (Exception exc)
{
    glDeleteShader(shader);
    throw exc;
}
}