Fixed Issue 199: Incorporate tile rendering library

With the permission of the author, Brian Paul, the Mesa tile rendering
library has been incorporated under BSD-compatible licensing terms
thanks to porting work by user bleb from the javagaming.org forums.
Added demos.misc.TiledRendering demo creating a high-resolution
screenshot of the Gears demo.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/../svn-server-sync/jogl-demos/trunk@171 3298f667-5e0e-4b4a-8ed4-a3559d26a5f4

1 files changed, 146 insertions, 0 deletions

diff --git a/src/demos/misc/TiledRendering.java b/src/demos/misc/TiledRendering.java
new file mode 100755
index 0000000..f5b857e
--- /dev/null
+++ b/src/demos/misc/TiledRendering.java
@@ -0,0 +1,146 @@
+package demos.misc;
+
+import java.awt.image.*;
+import java.io.*;
+import java.nio.*;
+import javax.imageio.*;
+
+import javax.media.opengl.*;
+import com.sun.opengl.util.*;
+
+import demos.gears.Gears;
+
+/** Demonstrates the TileRenderer class by rendering a large version
+    of the Gears demo to the specified file. */
+
+public class TiledRendering {
+  public static void main(String[] args) throws IOException {
+    if (args.length != 1) {
+      System.out.println("Usage: java TiledRendering [output file name]");
+      System.out.println("Writes output (a large version of the Gears demo) to");
+      System.out.println("the specified file, using either ImageIO or the fast TGA writer");
+      System.out.println("depending on the file extension.");
+      System.exit(1);
+    }
+
+    String filename = args[0];
+    File file = new File(filename);
+
+    if (!GLDrawableFactory.getFactory().canCreateGLPbuffer()) {
+      System.out.println("Demo requires pbuffer support");
+      System.exit(1);
+    }
+
+    // Use a pbuffer for rendering
+    GLCapabilities caps = new GLCapabilities();
+    caps.setDoubleBuffered(false);
+    GLPbuffer pbuffer = GLDrawableFactory.getFactory().createGLPbuffer(caps, null,
+                                                                       256, 256,
+                                                                       null);
+    
+    // Fix the image size for now
+    int tileWidth = 256;
+    int tileHeight = 256;
+    int imageWidth = tileWidth * 16;
+    int imageHeight = tileHeight * 12;
+    
+    // Figure out the file format
+    TGAWriter tga = null;
+    BufferedImage img = null;
+    Buffer buf = null;
+    
+    if (filename.endsWith(".tga")) {
+      tga = new TGAWriter();
+      tga.open(file,
+               imageWidth,
+               imageHeight,
+               false);
+      buf = tga.getImageData();
+    } else {
+      img = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_3BYTE_BGR);
+      buf = ByteBuffer.wrap(((DataBufferByte) img.getRaster().getDataBuffer()).getData());
+    }
+
+    // Initialize the tile rendering library
+    TileRenderer renderer = new TileRenderer();
+    renderer.setTileSize(tileWidth, tileHeight, 0);
+    renderer.setImageSize(imageWidth, imageHeight);
+    renderer.setImageBuffer(GL.GL_BGR, GL.GL_UNSIGNED_BYTE, buf);
+    renderer.trPerspective(20.0f, (float) imageWidth / (float) imageHeight, 5.0f, 60.0f);
+
+    GLContext context = pbuffer.getContext();
+    if (context.makeCurrent() == GLContext.CONTEXT_NOT_CURRENT) {
+      System.out.println("Error making pbuffer's context current");
+      System.exit(1);
+    }
+    
+    GL gl = pbuffer.getGL();
+    gl.glMatrixMode(GL.GL_MODELVIEW);
+    gl.glLoadIdentity();
+    gl.glTranslatef(0.0f, 0.0f, -40.0f);
+    // Tile renderer will set up projection matrix    
+
+    do {
+      renderer.beginTile(gl);
+      drawGears(gl);
+    } while (renderer.endTile(gl));
+
+    context.release();
+
+    // Close things up and/or write image using ImageIO
+    if (tga != null) {
+      tga.close();
+    } else {
+      ImageUtil.flipImageVertically(img);
+      if (!ImageIO.write(img, FileUtil.getFileSuffix(file), file)) {
+        System.err.println("Error writing file using ImageIO (unsupported file format?)");
+      }
+    }
+  }
+
+  private static void drawGears(GL gl) {
+    float view_rotx = 20.0f, view_roty = 30.0f, view_rotz = 0.0f;
+    float angle = 0.0f;
+    float pos[] = { 5.0f, 5.0f, 10.0f, 0.0f };
+    float red[] = { 0.8f, 0.1f, 0.0f, 1.0f };
+    float green[] = { 0.0f, 0.8f, 0.2f, 1.0f };
+    float blue[] = { 0.2f, 0.2f, 1.0f, 1.0f };
+
+    gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
+
+    gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, pos, 0);
+    gl.glEnable(GL.GL_CULL_FACE);
+    gl.glEnable(GL.GL_LIGHTING);
+    gl.glEnable(GL.GL_LIGHT0);
+    gl.glEnable(GL.GL_DEPTH_TEST);
+    gl.glEnable(GL.GL_NORMALIZE);
+
+    gl.glPushMatrix();
+    gl.glRotatef(view_rotx, 1.0f, 0.0f, 0.0f);
+    gl.glRotatef(view_roty, 0.0f, 1.0f, 0.0f);
+    gl.glRotatef(view_rotz, 0.0f, 0.0f, 1.0f);
+            
+    gl.glPushMatrix();
+    gl.glTranslatef(-3.0f, -2.0f, 0.0f);
+    gl.glRotatef(angle, 0.0f, 0.0f, 1.0f);
+    gl.glMaterialfv(GL.GL_FRONT, GL.GL_AMBIENT_AND_DIFFUSE, red, 0);
+    Gears.gear(gl, 1.0f, 4.0f, 1.0f, 20, 0.7f);
+    gl.glPopMatrix();
+            
+    gl.glPushMatrix();
+    gl.glTranslatef(3.1f, -2.0f, 0.0f);
+    gl.glRotatef(-2.0f * angle - 9.0f, 0.0f, 0.0f, 1.0f);
+    gl.glMaterialfv(GL.GL_FRONT, GL.GL_AMBIENT_AND_DIFFUSE, green, 0);
+    Gears.gear(gl, 0.5f, 2.0f, 2.0f, 10, 0.7f);
+    gl.glPopMatrix();
+            
+    gl.glPushMatrix();
+    gl.glTranslatef(-3.1f, 4.2f, 0.0f);
+    gl.glRotatef(-2.0f * angle - 25.0f, 0.0f, 0.0f, 1.0f);
+    gl.glMaterialfv(GL.GL_FRONT, GL.GL_AMBIENT_AND_DIFFUSE, blue, 0);
+    Gears.gear(gl, 1.3f, 2.0f, 0.5f, 10, 0.7f);
+    gl.glPopMatrix();
+            
+    gl.glPopMatrix();
+  }
+}