Examples of javax.media.opengl.GL

javax.media.opengl.GL
The basic interface to OpenGL, providing access to core functionality up through the OpenGL 2.0 specification as well as all vendor extensions.

While the APIs for vendor extensions are unconditionally exposed, the underlying functions may not be present. The method {@link #isFunctionAvailable} should be used to query theavailability of any non-core function before it is used for the first time; for example, gl.isFunctionAvailable("glProgramStringARB"). On certain platforms (Windows in particular), the most "core" functionality is only OpenGL 1.1, so in theory any routines first exposed in OpenGL 1.2, 1.3, and 1.4, 1.5, or 2.0 as well as vendor extensions should all be queried. Calling an unavailable function will cause a {@link GLException} to be raised.
{@link #isExtensionAvailable} may also be used to determine whethera specific extension is available before calling the routines or using the functionality it exposes: for example, gl.isExtensionAvailable("GL_ARB_vertex_program");. However, in this case it is up to the end user to know which routines or functionality are associated with which OpenGL extensions. It may also be used to test for the availability of a particular version of OpenGL: for example, gl.isExtensionAvailable("GL_VERSION_1_5");.
Exceptions to the window system extension naming rules:
- The memory allocators for the NVidia vertex_array_range (VAR) extension, in particular wglAllocateMemoryNV / glXAllocateMemoryNV and associated routines. {@link #glAllocateMemoryNV} has been provided for window system-independentaccess to VAR. {@link #isFunctionAvailable} will translate an argumentof "glAllocateMemoryNV" or "glFreeMemoryNV" into the appropriate window system-specific name.
- WGL_ARB_pbuffer, WGL_ARB_pixel_format, and other platform-specific pbuffer functionality; the availability of pbuffers can be queried on Windows, X11 and Mac OS X platforms by querying {@link #isExtensionAvailable} with an argument of"GL_ARB_pbuffer" or "GL_ARB_pixel_format".

    // native method for setting light enables
    @Override
    void setLightEnables(Context ctx, long enableMask, int maxLights) {
        if (VERBOSE) System.err.println("JoglPipeline.setLightEnables()");


        GL gl = context(ctx).getGL();


        for (int i = 0; i < maxLights; i++) {
            if ((enableMask & (1 << i)) != 0) {
                gl.glEnable(GL2.GL_LIGHT0 + i);
            } else {
                gl.glDisable(GL2.GL_LIGHT0 + i);
            }
        }
    }

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    // native method for disabling fog
    @Override
    void disableFog(Context ctx) {
        if (VERBOSE) System.err.println("JoglPipeline.disableFog()");


        GL gl = context(ctx).getGL();
        gl.glDisable(GL2.GL_FOG);
    }

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    // native method for disabling modelClip
    @Override
    void disableModelClip(Context ctx) {
        if (VERBOSE) System.err.println("JoglPipeline.disableModelClip()");


        GL gl = context(ctx).getGL();


        gl.glDisable(GL2.GL_CLIP_PLANE0);
        gl.glDisable(GL2.GL_CLIP_PLANE1);
        gl.glDisable(GL2.GL_CLIP_PLANE2);
        gl.glDisable(GL2.GL_CLIP_PLANE3);
        gl.glDisable(GL2.GL_CLIP_PLANE4);
        gl.glDisable(GL2.GL_CLIP_PLANE5);
    }

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    // native method for setting default TexCoordGeneration
    @Override
    void resetTexCoordGeneration(Context ctx) {
        if (VERBOSE) System.err.println("JoglPipeline.resetTexCoordGeneration()");


        GL gl = context(ctx).getGL();
        gl.glDisable(GL2.GL_TEXTURE_GEN_S);
        gl.glDisable(GL2.GL_TEXTURE_GEN_T);
        gl.glDisable(GL2.GL_TEXTURE_GEN_R);
        gl.glDisable(GL2.GL_TEXTURE_GEN_Q);
    }

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    // native method for setting default LineAttributes
    @Override
    void resetLineAttributes(Context ctx) {
        if (VERBOSE) System.err.println("JoglPipeline.resetLineAttributes()");


        GL gl = context(ctx).getGL();
        gl.glLineWidth(1.0f);
        gl.glDisable(GL2.GL_LINE_STIPPLE);


        // XXXX: Polygon Mode check, blend enable
        gl.glDisable(GL.GL_LINE_SMOOTH);
    }

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    void resetTransparency(Context ctx, int geometryType,
            int polygonMode, boolean lineAA,
            boolean pointAA) {
        if (VERBOSE) System.err.println("JoglPipeline.resetTransparency()");


        GL gl = context(ctx).getGL();


        if (((((geometryType & RenderMolecule.LINE) != 0) ||
                (polygonMode == PolygonAttributes.POLYGON_LINE))
                && lineAA) ||
                ((((geometryType & RenderMolecule.POINT) != 0) ||
                (polygonMode == PolygonAttributes.POLYGON_POINT))
                && pointAA)) {
            gl.glEnable(GL.GL_BLEND);
            gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
        } else {
            gl.glDisable(GL.GL_BLEND);
        }
        gl.glDisable(GL2.GL_POLYGON_STIPPLE);
    }

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     */
    @Override
    void syncRender(Context ctx, boolean wait) {
        if (VERBOSE) System.err.println("JoglPipeline.syncRender()");


        GL gl = context(ctx).getGL();


        if (wait)
            gl.glFinish();
        else
            gl.glFlush();
    }

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    // The native method for setting the Viewport.
    @Override
    void setViewport(Context ctx, int x, int y, int width, int height) {
        if (VERBOSE) System.err.println("JoglPipeline.setViewport()");
        GL gl = context(ctx).getGL();
        gl.glViewport(x, y, width, height);
    }

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    @Override
    void freeTexture(Context ctx, int id) {
        if (VERBOSE) System.err.println("JoglPipeline.freeTexture()");


        GL gl = context(ctx).getGL();


        if (id > 0) {
            int[] tmp = new int[1];
            tmp[0] = id;
            gl.glDeleteTextures(1, tmp, 0);
        } else {
            System.err.println("tried to delete tex with texid <= 0");
        }
    }

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  @Override
  int generateTexID(Context ctx) {
    if (VERBOSE) System.err.println("JoglPipeline.generateTexID()");


    GL gl = context(ctx).getGL();
    int[] tmp = new int[] { -1 };
    gl.glGenTextures(1, tmp, 0);


    if (tmp[0] < 1)
      return -1;


    return tmp[0];

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