Function initGL

cpp/4_CUDA_Libraries/oceanFFT/oceanFFT.cpp:699–742

/////////////////////////////////////////////////////////////////////////// Initialize GL ///////////////////////////////////////////////////////////////////////////

//! Initialize GL
////////////////////////////////////////////////////////////////////////////////
bool initGL(int *argc, char **argv)
{
    // Create GL context
    glutInit(argc, argv);
    glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
    glutInitWindowSize(windowW, windowH);
    glutCreateWindow("CUDA FFT Ocean Simulation");

    vertShaderPath = sdkFindFilePath("ocean.vert", argv[0]);
    fragShaderPath = sdkFindFilePath("ocean.frag", argv[0]);

    if (vertShaderPath == NULL || fragShaderPath == NULL) {
        fprintf(stderr, "Error unable to find GLSL vertex and fragment shaders!\n");
        exit(EXIT_FAILURE);
    }

    // initialize necessary OpenGL extensions

    if (!isGLVersionSupported(2, 0)) {
        fprintf(stderr, "ERROR: Support for necessary OpenGL extensions missing.");
        fflush(stderr);
        return false;
    }

    if (!areGLExtensionsSupported("GL_ARB_vertex_buffer_object GL_ARB_pixel_buffer_object")) {
        fprintf(stderr, "Error: failed to get minimal extensions for demo\n");
        fprintf(stderr, "This sample requires:\n");
        fprintf(stderr, "  OpenGL version 1.5\n");
        fprintf(stderr, "  GL_ARB_vertex_buffer_object\n");
        fprintf(stderr, "  GL_ARB_pixel_buffer_object\n");
        cleanup();
        exit(EXIT_FAILURE);
    }

    // default initialization
    glClearColor(0.0, 0.0, 0.0, 1.0);
    glEnable(GL_DEPTH_TEST);

    // load shader
    shaderProg = loadGLSLProgram(vertShaderPath, fragShaderPath);

    SDK_CHECK_ERROR_GL();
    return true;
}

////////////////////////////////////////////////////////////////////////////////
//! Create VBO