Copied JOGL_2_SANDBOX r350 on to trunk; JOGL_2_SANDBOX branch is now closed

git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/../svn-server-sync/jogl-demos/trunk@352 3298f667-5e0e-4b4a-8ed4-a3559d26a5f4

1 files changed, 228 insertions, 0 deletions

diff --git a/src/demos/util/FPSCounter.java b/src/demos/util/FPSCounter.java
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+/*
+ * Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ * - Redistribution of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 
+ * - Redistribution in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * 
+ * Neither the name of Sun Microsystems, Inc. or the names of
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * This software is provided "AS IS," without a warranty of any kind. ALL
+ * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
+ * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
+ * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
+ * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
+ * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
+ * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
+ * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
+ * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
+ * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
+ * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ * 
+ * You acknowledge that this software is not designed or intended for use
+ * in the design, construction, operation or maintenance of any nuclear
+ * facility.
+ * 
+ * Sun gratefully acknowledges that this software was originally authored
+ * and developed by Kenneth Bradley Russell and Christopher John Kline.
+ */
+
+package demos.util;
+
+import com.sun.opengl.util.awt.TextRenderer;
+import com.sun.opengl.util.texture.Texture;
+import java.awt.Font;
+import java.awt.geom.Rectangle2D;
+import java.text.DecimalFormat;
+import javax.media.opengl.GLDrawable;
+import javax.media.opengl.GLException;
+
+
+
+/** A simple class which uses the TextRenderer to provide an FPS
+    counter overlaid on top of the scene. */
+
+public class FPSCounter {
+  // Placement constants
+  public static final int UPPER_LEFT  = 1;
+  public static final int UPPER_RIGHT = 2;
+  public static final int LOWER_LEFT  = 3;
+  public static final int LOWER_RIGHT = 4;
+
+  private int textLocation = LOWER_RIGHT;
+  private GLDrawable drawable;
+  private TextRenderer renderer;
+  private DecimalFormat format = new DecimalFormat("####.00");
+  private int frameCount;
+  private long startTime;
+  private String fpsText;
+  private int fpsMagnitude;
+  private int fpsWidth;
+  private int fpsHeight;
+  private int fpsOffset;
+  
+  /** Creates a new FPSCounter with the given font size. An OpenGL
+      context must be current at the time the constructor is called.
+
+      @param drawable the drawable to render the text to
+      @param textSize the point size of the font to use
+      @throws GLException if an OpenGL context is not current when the constructor is called
+  */
+  public FPSCounter(GLDrawable drawable, int textSize) throws GLException {
+    this(drawable, new Font("SansSerif", Font.BOLD, textSize));
+  }
+
+  /** Creates a new FPSCounter with the given font. An OpenGL context
+      must be current at the time the constructor is called.
+
+      @param drawable the drawable to render the text to
+      @param font the font to use
+      @throws GLException if an OpenGL context is not current when the constructor is called
+  */
+  public FPSCounter(GLDrawable drawable, Font font) throws GLException {
+    this(drawable, font, true, true);
+  }
+
+  /** Creates a new FPSCounter with the given font and rendering
+      attributes. An OpenGL context must be current at the time the
+      constructor is called.
+
+      @param drawable the drawable to render the text to
+      @param font the font to use
+      @param antialiased whether to use antialiased fonts
+      @param useFractionalMetrics whether to use fractional font
+      @throws GLException if an OpenGL context is not current when the constructor is called
+  */
+  public FPSCounter(GLDrawable drawable,
+                    Font font,
+                    boolean antialiased,
+                    boolean useFractionalMetrics) throws GLException {
+    this.drawable = drawable;
+    renderer = new TextRenderer(font, antialiased, useFractionalMetrics);
+  }
+
+  /** Gets the relative location where the text of this FPSCounter
+      will be drawn: one of UPPER_LEFT, UPPER_RIGHT, LOWER_LEFT, or
+      LOWER_RIGHT. Defaults to LOWER_RIGHT. */
+  public int getTextLocation() {
+    return textLocation;
+  }
+
+  /** Sets the relative location where the text of this FPSCounter
+      will be drawn: one of UPPER_LEFT, UPPER_RIGHT, LOWER_LEFT, or
+      LOWER_RIGHT. Defaults to LOWER_RIGHT. */
+  public void setTextLocation(int textLocation) {
+    if (textLocation < UPPER_LEFT || textLocation > LOWER_RIGHT) {
+      throw new IllegalArgumentException("textLocation");
+    }
+    this.textLocation = textLocation;
+  }
+
+  /** Changes the current color of this TextRenderer to the supplied
+      one, where each component ranges from 0.0f - 1.0f. The alpha
+      component, if used, does not need to be premultiplied into the
+      color channels as described in the documentation for {@link
+      Texture Texture}, although premultiplied colors are used
+      internally. The default color is opaque white.
+
+      @param r the red component of the new color
+      @param g the green component of the new color
+      @param b the blue component of the new color
+      @param alpha the alpha component of the new color, 0.0f =
+        completely transparent, 1.0f = completely opaque
+      @throws GLException If an OpenGL context is not current when this method is called
+  */
+  public void setColor(float r, float g, float b, float a) throws GLException {
+    renderer.setColor(r, g, b, a);
+  }
+
+  /** Updates the FPSCounter's internal timer and counter and draws
+      the computed FPS. It is assumed this method will be called only
+      once per frame.
+  */
+  public void draw() {
+    if (startTime == 0) {
+      startTime = System.currentTimeMillis();
+    }
+
+    if (++frameCount >= 100) {
+      long endTime = System.currentTimeMillis();
+      float fps = 100.0f / (float) (endTime - startTime) * 1000;
+      recomputeFPSSize(fps);
+      frameCount = 0;
+      startTime = System.currentTimeMillis();
+
+      fpsText = "FPS: " + format.format(fps);
+    }
+
+    if (fpsText != null) {
+      renderer.beginRendering(drawable.getWidth(), drawable.getHeight());
+      // Figure out the location at which to draw the text
+      int x = 0;
+      int y = 0;
+      switch (textLocation) {
+        case UPPER_LEFT:
+          x = fpsOffset;
+          y = drawable.getHeight() - fpsHeight - fpsOffset;
+          break;
+
+        case UPPER_RIGHT:
+          x = drawable.getWidth() - fpsWidth - fpsOffset;
+          y = drawable.getHeight() - fpsHeight - fpsOffset;
+          break;
+
+        case LOWER_LEFT:
+          x = fpsOffset;
+          y = fpsOffset;
+          break;
+
+        case LOWER_RIGHT:
+          x = drawable.getWidth() - fpsWidth - fpsOffset;
+          y = fpsOffset;
+          break;
+      }
+
+      renderer.draw(fpsText, x, y);
+      renderer.endRendering();
+    }
+  }
+
+  private void recomputeFPSSize(float fps) {
+    String fpsText;
+    int fpsMagnitude;
+    if (fps >= 10000) {
+      fpsText = "10000.00";
+      fpsMagnitude = 5;
+    } else if (fps >= 1000) {
+      fpsText = "1000.00";
+      fpsMagnitude = 4;
+    } else if (fps >= 100) {
+      fpsText = "100.00";
+      fpsMagnitude = 3;
+    } else if (fps >= 10) {
+      fpsText = "10.00";
+      fpsMagnitude = 2;
+    } else {
+      fpsText = "9.00";
+      fpsMagnitude = 1;
+    }
+
+    if (fpsMagnitude > this.fpsMagnitude) {
+      Rectangle2D bounds = renderer.getBounds("FPS: " + fpsText);
+      fpsWidth = (int) bounds.getWidth();
+      fpsHeight = (int) bounds.getHeight();
+      fpsOffset = (int) (fpsHeight * 0.5f);
+      this.fpsMagnitude = fpsMagnitude;
+    }
+  }
+}