Example usage for org.lwjgl.opengl GL getFunctionProvider

Introduction

In this page you can find the example usage for org.lwjgl.opengl GL getFunctionProvider.

Prototype

@Nullable
public static FunctionProvider getFunctionProvider() 

Source Link

Document

Returns the FunctionProvider for the OpenGL native library.

Usage

From source file:org.lwjgl.system.jglfw.PlatformLinux.java

License:Open Source License

private static boolean initContextAPI() {
    GL.getFunctionProvider(); // touch to load libGL

    // Check if GLX is supported on this display
    if (glXQueryExtension(x11.display, glx.errorBase, glx.eventBase) == 0) {
        inputError(GLFW_API_UNAVAILABLE, "GLX: GLX support not found");
        return false;
    }//  ww  w.  j a va2s . c  om

    if (glXQueryVersion(x11.display, glx.versionMajor, glx.versionMinor) == 0) {
        inputError(GLFW_API_UNAVAILABLE, "GLX: Failed to query GLX version");
        return false;
    }

    // LWJGL note: We need to call GLX functions before context creation. We retrieve the function pointers here and call the JNI methods manually.
    // (GLX function pointers do not change across contexts, that's why we can do this).
    FunctionProvider functionProvider = GL.getFunctionProvider();

    // LWJGL TODO: We basically require GLX 1.3 with these. Relax?
    glx.QueryExtensionsString = functionProvider.getFunctionAddress("glXQueryExtensionsString");
    glx.ChooseFBConfig = functionProvider.getFunctionAddress("glXChooseFBConfig");
    glx.GetVisualFromFBConfig = functionProvider.getFunctionAddress("glXGetVisualFromFBConfig");
    glx.CreateNewContext = functionProvider.getFunctionAddress("glXCreateNewContext");

    String extensionsString = memDecodeASCII(
            memByteBufferNT1(nglXQueryExtensionsString(x11.display, x11.screen, glx.QueryExtensionsString)));
    Set<String> extensions = new HashSet<String>(32);
    StringTokenizer tokenizer = new StringTokenizer(extensionsString);
    while (tokenizer.hasMoreTokens())
        extensions.add(tokenizer.nextToken());

    if (extensions.contains("GLX_EXT_swap_control")) {
        glx.SwapIntervalEXT = functionProvider.getFunctionAddress("glXSwapIntervalEXT");

        if (glx.SwapIntervalEXT != NULL)
            glx.EXT_swap_control = true;
    }

    if (extensions.contains("GLX_SGI_swap_control")) {
        glx.SwapIntervalSGI = functionProvider.getFunctionAddress("glXSwapIntervalSGI");

        if (glx.SwapIntervalSGI != NULL)
            glx.SGI_swap_control = true;
    }

    if (extensions.contains("GLX_MESA_swap_control")) {
        glx.SwapIntervalMESA = functionProvider.getFunctionAddress("glXSwapIntervalMESA");

        if (glx.SwapIntervalMESA != NULL)
            glx.MESA_swap_control = true;
    }

    if (extensions.contains("GLX_SGIX_fbconfig")) {
        glx.GetFBConfigAttribSGIX = functionProvider.getFunctionAddress("glXGetFBConfigAttribSGIX");
        glx.ChooseFBConfigSGIX = functionProvider.getFunctionAddress("glXChooseFBConfigSGIX");
        glx.CreateContextWithConfigSGIX = functionProvider.getFunctionAddress("glXCreateContextWithConfigSGIX");
        glx.GetVisualFromFBConfigSGIX = functionProvider.getFunctionAddress("glXGetVisualFromFBConfigSGIX");

        if (glx.GetFBConfigAttribSGIX != NULL && glx.ChooseFBConfigSGIX != NULL
                && glx.CreateContextWithConfigSGIX != NULL && glx.GetVisualFromFBConfigSGIX != NULL) {
            glx.SGIX_fbconfig = true;
        }
    }

    if (extensions.contains("GLX_ARB_multisample"))
        glx.ARB_multisample = true;

    if (extensions.contains("GLX_ARB_framebuffer_sRGB"))
        glx.ARB_framebuffer_sRGB = true;

    if (extensions.contains("GLX_ARB_create_context")) {
        glx.CreateContextAttribsARB = functionProvider.getFunctionAddress("glXCreateContextAttribsARB");

        if (glx.CreateContextAttribsARB != NULL)
            glx.ARB_create_context = true;
    }

    if (extensions.contains("GLX_ARB_create_context_robustness"))
        glx.ARB_create_context_robustness = true;

    if (extensions.contains("GLX_ARB_create_context_profile"))
        glx.ARB_create_context_profile = true;

    if (extensions.contains("GLX_EXT_create_context_es2_profile"))
        glx.EXT_create_context_es2_profile = true;

    return true;
}

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