import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;
import com.sun.opengl.util.texture.*;
public class JoglSample30
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;
    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);
        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff,
                    1f);
                try
                {
                Texture texture = TextureIO.newTexture(
                    new File("sf.jpg"), true);
                texture.enable();
                texture.bind();
                }
                catch(IOException ioex){}
            }
            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLUT glut = new GLUT();
                gl.glViewport(0, 0, width, height);
                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 40.0f);
                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(0.0f, 0.0f, -10.0f);
                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glEnable(GL.GL_CULL_FACE);
                gl.glClear(GL.GL_COLOR_BUFFER_BIT |GL.GL_DEPTH_BUFFER_BIT );
                gl.glPushMatrix();
                // Y軸回転
                gl.glRotatef(20.0f, 0.0f, 1.0f, 0.0f);
                // テクスチャが張られたポリゴンを描画
                gl.glBegin(GL.GL_POLYGON);
                gl.glTexCoord2f(0.0f, 1.0f);
                gl.glVertex3f(-1.5f, -1.5f,  0.0f);
                gl.glTexCoord2f(1.0f, 1.0f);
                gl.glVertex3f(1.5f, -1.5f,  0.0f);
                gl.glTexCoord2f(1.0f, 0.0f);
                gl.glVertex3f(1.5f,  1.5f,  0.0f);
                gl.glTexCoord2f(0.0f, 0.0f);
                gl.glVertex3f(-1.5f,  1.5f,  0.0f);
                gl.glEnd();
                gl.glPopMatrix();
            }
            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}
            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}
          }
        );
        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1188a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}
出力画像(sample1138a.png)
 
 
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