Java Bindings for OpenGL

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Java Binding for the OpenGL API is a JSR API specification (JSR 231) for the Java Platform, Standard Edition which allows to use OpenGL on the Java (software platform).^[1] There is also Java Binding for the OpenGL ES API (JSR 239) for the Java Platform, Micro Edition.

Core OpenGL API and GLU library calls are available from Java through a thin wrapper looking very much as the original OpenGL C API, Except GLU NURBS routines which are not exposed through the public API.

All platform specific libraries (available from the CGL API for Mac OS X, GLX for X Window System, and WGL for Microsoft Windows) are also abstracted out to create a platform independent way of selecting Framebuffer attributes and performing platform specific Framebuffer operations.

Platform-specific extensions are not included in the public API. Each implementation can choose to export some of these APIs via the GL.getPlatformGLExtensions() Archived 2011-02-17 at the Wayback Machine and GL.getExtension(String) Archived 2011-02-17 at the Wayback Machine method calls which return Objects whose data types are specific to the given implementation.

This example shows how to draw a polygon (without initialization or repaint code).^[2] Here is the reference C implementation:

 int DrawGLScene(GLvoid) {     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);     glLoadIdentity();     glTranslatef(-1.5f, 0.0f, -6.0f); // Move Left 1.5 Units     glBegin(GL_TRIANGLES); //Drawing Using Triangles     glVertex3f( 0.0f, 1.0f, 0.0f); // Top     glVertex3f(-1.0f,-1.0f, 0.0f); // Bottom Left     glVertex3f( 1.0f,-1.0f, 0.0f); // Bottom Right     glEnd();	     glTranslatef(3.0f, 0.0f, 0.0f);     glBegin(GL_QUADS); // Draw A Quad     glVertex3f(-1.0f, 1.0f, 0.0f); // Top Left     glVertex3f( 1.0f, 1.0f, 0.0f); // Top Right     glVertex3f( 1.0f,-1.0f, 0.0f); // Bottom Right     glVertex3f(-1.0f,-1.0f, 0.0f); // Bottom Left     glEnd();     glFlush();     return TRUE;  } 

Which translates to the following Java implementation:

 public void display(GLAutoDrawable glDrawable) {    final GL gl = glDrawable.getGL();    gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);    gl.glLoadIdentity();    gl.glTranslatef(-1.5f, 0.0f, -6.0f); // Move Left 1.5 Units    gl.glBegin(GL.GL_TRIANGLES); // Drawing Using Triangles    gl.glVertex3f( 0.0f, 1.0f, 0.0f); // Top    gl.glVertex3f(-1.0f,-1.0f, 0.0f); // Bottom Left    gl.glVertex3f( 1.0f,-1.0f, 0.0f); // Bottom Right    gl.glEnd();    gl.glTranslatef(3.0f, 0.0f, 0.0f);    gl.glBegin(GL.GL_QUADS); // Draw A Quad    gl.glVertex3f(-1.0f, 1.0f, 0.0f); // Top Left    gl.glVertex3f( 1.0f, 1.0f, 0.0f); // Top Right    gl.glVertex3f( 1.0f,-1.0f, 0.0f); // Bottom Right    gl.glVertex3f(-1.0f,-1.0f, 0.0f); // Bottom Left    gl.glEnd();    gl.glFlush();  } 

• Java OpenGL : The reference implementation, available on Microsoft Windows, Linux, Mac OS X, and Solaris platforms.^[3]

• OpenGL
• Java Community Process

• JSR web page for Java Binding for the OpenGL API
• JSR web page for Java Binding for the OpenGL ES API
• JOGL home page
• JSR 231 Specification (draft)