Attachment 128 Details for Bug 356 – Cleanest bug fix (force the use of VBO on OpenGL 1.4 if GL_ARB_vertex_buffer_object is available)

Cleanest bug fix (force the use of VBO on OpenGL 1.4 if GL_ARB_vertex_buffer_object is available)

TextRenderer.java (text/plain), 77.27 KB, created by Sven Gothel on 2008-06-02 12:59:00 CEST

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Creator: Sven Gothel

Created: 2008-06-02 12:59:00 CEST

Size: 77.27 KB

patch

obsolete

>/*
> * Copyright (c) 2006 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 com.sun.opengl.util.j2d;
>
>import com.sun.opengl.impl.*;
>import com.sun.opengl.impl.packrect.*;
>import com.sun.opengl.util.*;
>import com.sun.opengl.util.texture.*;
>
>import java.awt.AlphaComposite;
>import java.awt.Color;
>import java.awt.Composite;
>
>// For debugging purposes
>import java.awt.EventQueue;
>import java.awt.Font;
>import java.awt.Frame;
>import java.awt.Graphics2D;
>import java.awt.Image;
>import java.awt.Point;
>import java.awt.RenderingHints;
>import java.awt.event.*;
>import java.awt.font.*;
>import java.awt.geom.*;
>
>import java.nio.*;
>
>import java.text.*;
>
>import java.util.*;
>
>import javax.media.opengl.*;
>import javax.media.opengl.glu.*;
>
>
>/** Renders bitmapped Java 2D text into an OpenGL window with high
> performance, full Unicode support, and a simple API. Performs
> appropriate caching of text rendering results in an OpenGL texture
> internally to avoid repeated font rasterization. The caching is
> completely automatic, does not require any user intervention, and
> has no visible controls in the public API. 
>
> Using the {@link TextRenderer TextRenderer} is simple. Add a
> "<code>TextRenderer renderer;</code>" field to your {@link
> javax.media.opengl.GLEventListener GLEventListener}. In your {@link
> javax.media.opengl.GLEventListener#init init} method, add:
>
> <PRE>
> renderer = new TextRenderer(new Font("SansSerif", Font.BOLD, 36));
> </PRE>
>
> In the {@link javax.media.opengl.GLEventListener#display display} method of your
> {@link javax.media.opengl.GLEventListener GLEventListener}, add:
> <PRE>
> renderer.beginRendering(drawable.getWidth(), drawable.getHeight());
> // optionally set the color
> renderer.setColor(1.0f, 0.2f, 0.2f, 0.8f);
> renderer.draw("Text to draw", xPosition, yPosition);
> // ... more draw commands, color changes, etc.
> renderer.endRendering();
> </PRE>
>
> Unless you are sharing textures and display lists between OpenGL
> contexts, you do not need to call the {@link #dispose dispose}
> method of the TextRenderer; the OpenGL resources it uses
> internally will be cleaned up automatically when the OpenGL
> context is destroyed. 
>
> Note that the TextRenderer may cause the vertex and texture
> coordinate array buffer bindings to change, or to be unbound. This
> is important to note if you are using Vertex Buffer Objects (VBOs)
> in your application. 
>
> Internally, the renderer uses a rectangle packing algorithm to
> pack both glyphs and full Strings' rendering results (which are
> variable size) onto a larger OpenGL texture. The internal backing
> store is maintained using a {@link
> com.sun.opengl.util.j2d.TextureRenderer TextureRenderer}. A least
> recently used (LRU) algorithm is used to discard previously
> rendered strings; the specific algorithm is undefined, but is
> currently implemented by flushing unused Strings' rendering
> results every few hundred rendering cycles, where a rendering
> cycle is defined as a pair of calls to {@link #beginRendering
> beginRendering} / {@link #endRendering endRendering}.
>
> @author John Burkey
> @author Kenneth Russell
>*/
>public class TextRenderer {
> private static final boolean DEBUG = Debug.debug("TextRenderer");
>
> // These are occasionally useful for more in-depth debugging
> private static final boolean DISABLE_GLYPH_CACHE = false;
> private static final boolean DRAW_BBOXES = false;
>
> static final int kSize = 256;
>
> // Every certain number of render cycles, flush the strings which
> // haven't been used recently
> private static final int CYCLES_PER_FLUSH = 100;
>
> // The amount of vertical dead space on the backing store before we
> // force a compaction
> private static final float MAX_VERTICAL_FRAGMENTATION = 0.7f;
> static final int kQuadsPerBuffer = 100;
> static final int kCoordsPerVertVerts = 3;
> static final int kCoordsPerVertTex = 2;
> static final int kVertsPerQuad = 4;
> static final int kTotalBufferSizeVerts = kQuadsPerBuffer * kVertsPerQuad;
> static final int kTotalBufferSizeCoordsVerts = kQuadsPerBuffer * kVertsPerQuad * kCoordsPerVertVerts;
> static final int kTotalBufferSizeCoordsTex = kQuadsPerBuffer * kVertsPerQuad * kCoordsPerVertTex;
> static final int kTotalBufferSizeBytesVerts = kTotalBufferSizeCoordsVerts * 4;
> static final int kTotalBufferSizeBytesTex = kTotalBufferSizeCoordsTex * 4;
> static final int kSizeInBytes_OneVertices_VertexData = kCoordsPerVertVerts * 4;
> static final int kSizeInBytes_OneVertices_TexData = kCoordsPerVertTex * 4;
> private Font font;
> private boolean antialiased;
> private boolean useFractionalMetrics;
>
> // Whether we're attempting to use automatic mipmap generation support
> private boolean mipmap;
> private RectanglePacker packer;
> private boolean haveMaxSize;
> private RenderDelegate renderDelegate;
> private TextureRenderer cachedBackingStore;
> private Graphics2D cachedGraphics;
> private FontRenderContext cachedFontRenderContext;
> private Map /*<String,Rect>*/ stringLocations = new HashMap /*<String,Rect>*/();
> private GlyphProducer mGlyphProducer;
>
> private int numRenderCycles;
>
> // Need to keep track of whether we're in a beginRendering() /
> // endRendering() cycle so we can re-enter the exact same state if
> // we have to reallocate the backing store
> private boolean inBeginEndPair;
> private boolean isOrthoMode;
> private int beginRenderingWidth;
> private int beginRenderingHeight;
> private boolean beginRenderingDepthTestDisabled;
>
> // For resetting the color after disposal of the old backing store
> private boolean haveCachedColor;
> private float cachedR;
> private float cachedG;
> private float cachedB;
> private float cachedA;
> private Color cachedColor;
> private boolean needToResetColor;
>
> // For debugging only
> private Frame dbgFrame;
>
> // Debugging purposes only
> private boolean debugged;
> Pipelined_QuadRenderer mPipelinedQuadRenderer;
> 
> //emzic: added boolean flag
> private boolean useVertexArrays = true;
> 
> //emzic: added boolean flag
> private boolean isExtensionAvailable_VBO;
> private boolean checkFor_isExtensionAvailable_VBO;
>
> // Whether GL_LINEAR filtering is enabled for the backing store
> private boolean smoothing = true;
>
> /** Creates a new TextRenderer with the given font, using no
> antialiasing or fractional metrics, and the default
> RenderDelegate. Equivalent to <code>TextRenderer(font, false,
> false)</code>.
>
> @param font the font to render with
> */
> public TextRenderer(Font font) {
> this(font, false, false, null, false);
> }
>
> /** Creates a new TextRenderer with the given font, using no
> antialiasing or fractional metrics, and the default
> RenderDelegate. If <CODE>mipmap</CODE> is true, attempts to use
> OpenGL's automatic mipmap generation for better smoothing when
> rendering the TextureRenderer's contents at a distance.
> Equivalent to <code>TextRenderer(font, false, false)</code>.
>
> @param font the font to render with
> @param mipmap whether to attempt use of automatic mipmap generation
> */
> public TextRenderer(Font font, boolean mipmap) {
> this(font, false, false, null, mipmap);
> }
>
> /** Creates a new TextRenderer with the given Font, specified font
> properties, and default RenderDelegate. The
> <code>antialiased</code> and <code>useFractionalMetrics</code>
> flags provide control over the same properties at the Java 2D
> level. No mipmap support is requested. Equivalent to
> <code>TextRenderer(font, antialiased, useFractionalMetrics,
> null)</code>.
>
> @param font the font to render with
> @param antialiased whether to use antialiased fonts
> @param useFractionalMetrics whether to use fractional font
> metrics at the Java 2D level
> */
> public TextRenderer(Font font, boolean antialiased,
> boolean useFractionalMetrics) {
> this(font, antialiased, useFractionalMetrics, null, false);
> }
>
> /** Creates a new TextRenderer with the given Font, specified font
> properties, and given RenderDelegate. The
> <code>antialiased</code> and <code>useFractionalMetrics</code>
> flags provide control over the same properties at the Java 2D
> level. The <code>renderDelegate</code> provides more control
> over the text rendered. No mipmap support is requested.
>
> @param font the font to render with
> @param antialiased whether to use antialiased fonts
> @param useFractionalMetrics whether to use fractional font
> metrics at the Java 2D level
> @param renderDelegate the render delegate to use to draw the
> text's bitmap, or null to use the default one
> */
> public TextRenderer(Font font, boolean antialiased,
> boolean useFractionalMetrics, RenderDelegate renderDelegate) {
> this(font, antialiased, useFractionalMetrics, renderDelegate, false);
> }
>
> /** Creates a new TextRenderer with the given Font, specified font
> properties, and given RenderDelegate. The
> <code>antialiased</code> and <code>useFractionalMetrics</code>
> flags provide control over the same properties at the Java 2D
> level. The <code>renderDelegate</code> provides more control
> over the text rendered. If <CODE>mipmap</CODE> is true, attempts
> to use OpenGL's automatic mipmap generation for better smoothing
> when rendering the TextureRenderer's contents at a distance.
>
> @param font the font to render with
> @param antialiased whether to use antialiased fonts
> @param useFractionalMetrics whether to use fractional font
> metrics at the Java 2D level
> @param renderDelegate the render delegate to use to draw the
> text's bitmap, or null to use the default one
> @param mipmap whether to attempt use of automatic mipmap generation
> */
> public TextRenderer(Font font, boolean antialiased,
> boolean useFractionalMetrics, RenderDelegate renderDelegate,
> boolean mipmap) {
> this.font = font;
> this.antialiased = antialiased;
> this.useFractionalMetrics = useFractionalMetrics;
> this.mipmap = mipmap;
>
> // FIXME: consider adjusting the size based on font size
> // (it will already automatically resize if necessary)
> packer = new RectanglePacker(new Manager(), kSize, kSize);
>
> if (renderDelegate == null) {
> renderDelegate = new DefaultRenderDelegate();
> }
>
> this.renderDelegate = renderDelegate;
>
> mGlyphProducer = new GlyphProducer(font.getNumGlyphs());
> }
>
> /** Returns the bounding rectangle of the given String, assuming it
> was rendered at the origin. See {@link #getBounds(CharSequence)
> getBounds(CharSequence)}. */
> public Rectangle2D getBounds(String str) {
> return getBounds((CharSequence) str);
> }
>
> /** Returns the bounding rectangle of the given CharSequence,
> assuming it was rendered at the origin. The coordinate system of
> the returned rectangle is Java 2D's, with increasing Y
> coordinates in the downward direction. The relative coordinate
> (0, 0) in the returned rectangle corresponds to the baseline of
> the leftmost character of the rendered string, in similar
> fashion to the results returned by, for example, {@link
> java.awt.font.GlyphVector#getVisualBounds}. Most applications
> will use only the width and height of the returned Rectangle for
> the purposes of centering or justifying the String. It is not
> specified which Java 2D bounds ({@link
> java.awt.font.GlyphVector#getVisualBounds getVisualBounds},
> {@link java.awt.font.GlyphVector#getPixelBounds getPixelBounds},
> etc.) the returned bounds correspond to, although every effort
> is made to ensure an accurate bound. */
> public Rectangle2D getBounds(CharSequence str) {
> // FIXME: this should be more optimized and use the glyph cache
> Rect r = null;
>
> if ((r = (Rect) stringLocations.get(str)) != null) {
> TextData data = (TextData) r.getUserData();
>
> // Reconstitute the Java 2D results based on the cached values
> return new Rectangle2D.Double(-data.origin().x, -data.origin().y,
> r.w(), r.h());
> }
>
> // Must return a Rectangle compatible with the layout algorithm --
> // must be idempotent
> return normalize(renderDelegate.getBounds(str, font,
> getFontRenderContext()));
> }
>
> /** Returns the Font this renderer is using. */
> public Font getFont() {
> return font;
> }
>
> /** Returns a FontRenderContext which can be used for external
> text-related size computations. This object should be considered
> transient and may become invalidated between {@link
> #beginRendering beginRendering} / {@link #endRendering
> endRendering} pairs. */
> public FontRenderContext getFontRenderContext() {
> if (cachedFontRenderContext == null) {
> cachedFontRenderContext = getGraphics2D().getFontRenderContext();
> }
>
> return cachedFontRenderContext;
> }
>
> /** Begins rendering with this {@link TextRenderer TextRenderer}
> into the current OpenGL drawable, pushing the projection and
> modelview matrices and some state bits and setting up a
> two-dimensional orthographic projection with (0, 0) as the
> lower-left coordinate and (width, height) as the upper-right
> coordinate. Binds and enables the internal OpenGL texture
> object, sets the texture environment mode to GL_MODULATE, and
> changes the current color to the last color set with this
> TextRenderer via {@link #setColor setColor}. This method
> disables the depth test and is equivalent to
> beginRendering(width, height, true).
>
> @param width the width of the current on-screen OpenGL drawable
> @param height the height of the current on-screen OpenGL drawable
> @throws javax.media.opengl.GLException If an OpenGL context is not current when this method is called
> */
> public void beginRendering(int width, int height) throws GLException {
> beginRendering(width, height, true);
> }
>
> /** Begins rendering with this {@link TextRenderer TextRenderer}
> into the current OpenGL drawable, pushing the projection and
> modelview matrices and some state bits and setting up a
> two-dimensional orthographic projection with (0, 0) as the
> lower-left coordinate and (width, height) as the upper-right
> coordinate. Binds and enables the internal OpenGL texture
> object, sets the texture environment mode to GL_MODULATE, and
> changes the current color to the last color set with this
> TextRenderer via {@link #setColor setColor}. Disables the depth
> test if the disableDepthTest argument is true.
>
> @param width the width of the current on-screen OpenGL drawable
> @param height the height of the current on-screen OpenGL drawable
> @param disableDepthTest whether to disable the depth test
> @throws GLException If an OpenGL context is not current when this method is called
> */
> public void beginRendering(int width, int height, boolean disableDepthTest)
> throws GLException {
> beginRendering(true, width, height, disableDepthTest);
> }
>
> /** Begins rendering of 2D text in 3D with this {@link TextRenderer
> TextRenderer} into the current OpenGL drawable. Assumes the end
> user is responsible for setting up the modelview and projection
> matrices, and will render text using the {@link #draw3D draw3D}
> method. This method pushes some OpenGL state bits, binds and
> enables the internal OpenGL texture object, sets the texture
> environment mode to GL_MODULATE, and changes the current color
> to the last color set with this TextRenderer via {@link
> #setColor setColor}.
>
> @throws GLException If an OpenGL context is not current when this method is called
> */
> public void begin3DRendering() throws GLException {
> beginRendering(false, 0, 0, false);
> }
>
> /** Changes the current color of this TextRenderer to the supplied
> one. The default color is opaque white.
>
> @param color the new color to use for rendering text
> @throws GLException If an OpenGL context is not current when this method is called
> */
> public void setColor(Color color) throws GLException {
> boolean noNeedForFlush = (haveCachedColor && (cachedColor != null) &&
> color.equals(cachedColor));
>
> if (!noNeedForFlush) {
> flushGlyphPipeline();
> }
>
> getBackingStore().setColor(color);
> haveCachedColor = true;
> cachedColor = color;
> }
>
> /** 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
> com.sun.opengl.util.texture.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 a 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 {
> boolean noNeedForFlush = (haveCachedColor && (cachedColor == null) &&
> (r == cachedR) && (g == cachedG) && (b == cachedB) &&
> (a == cachedA));
>
> if (!noNeedForFlush) {
> flushGlyphPipeline();
> }
>
> getBackingStore().setColor(r, g, b, a);
> haveCachedColor = true;
> cachedR = r;
> cachedG = g;
> cachedB = b;
> cachedA = a;
> cachedColor = null;
> }
>
> /** Draws the supplied CharSequence at the desired location using
> the renderer's current color. The baseline of the leftmost
> character is at position (x, y) specified in OpenGL coordinates,
> where the origin is at the lower-left of the drawable and the Y
> coordinate increases in the upward direction.
>
> @param str the string to draw
> @param x the x coordinate at which to draw
> @param y the y coordinate at which to draw
> @throws GLException If an OpenGL context is not current when this method is called
> */
> public void draw(CharSequence str, int x, int y) throws GLException {
> draw3D(str, x, y, 0, 1);
> }
>
> /** Draws the supplied String at the desired location using the
> renderer's current color. See {@link #draw(CharSequence, int,
> int) draw(CharSequence, int, int)}. */
> public void draw(String str, int x, int y) throws GLException {
> draw3D(str, x, y, 0, 1);
> }
>
> /** Draws the supplied CharSequence at the desired 3D location using
> the renderer's current color. The baseline of the leftmost
> character is placed at position (x, y, z) in the current
> coordinate system.
>
> @param str the string to draw
> @param x the x coordinate at which to draw
> @param y the y coordinate at which to draw
> @param z the z coordinate at which to draw
> @param scaleFactor a uniform scale factor applied to the width and height of the drawn rectangle
> @throws GLException If an OpenGL context is not current when this method is called
> */
> public void draw3D(CharSequence str, float x, float y, float z,
> float scaleFactor) {
> internal_draw3D(str, x, y, z, scaleFactor);
> }
>
> /** Draws the supplied String at the desired 3D location using the
> renderer's current color. See {@link #draw3D(CharSequence,
> float, float, float, float) draw3D(CharSequence, float, float,
> float, float)}. */
> public void draw3D(String str, float x, float y, float z, float scaleFactor) {
> internal_draw3D(str, x, y, z, scaleFactor);
> }
>
> /** Returns the pixel width of the given character. */
> public float getCharWidth(char inChar) {
> return mGlyphProducer.getGlyphPixelWidth(inChar);
> }
>
> /** Causes the TextRenderer to flush any internal caches it may be
> maintaining and draw its rendering results to the screen. This
> should be called after each call to draw() if you are setting
> OpenGL state such as the modelview matrix between calls to
> draw(). */
> public void flush() {
> flushGlyphPipeline();
> }
>
> /** Ends a render cycle with this {@link TextRenderer TextRenderer}.
> Restores the projection and modelview matrices as well as
> several OpenGL state bits. Should be paired with {@link
> #beginRendering beginRendering}.
>
> @throws GLException If an OpenGL context is not current when this method is called
> */
> public void endRendering() throws GLException {
> endRendering(true);
> }
>
> /** Ends a 3D render cycle with this {@link TextRenderer TextRenderer}.
> Restores several OpenGL state bits. Should be paired with {@link
> #begin3DRendering begin3DRendering}.
>
> @throws GLException If an OpenGL context is not current when this method is called
> */
> public void end3DRendering() throws GLException {
> endRendering(false);
> }
>
> /** Disposes of all resources this TextRenderer is using. It is not
> valid to use the TextRenderer after this method is called.
>
> @throws GLException If an OpenGL context is not current when this method is called
> */
> public void dispose() throws GLException {
> packer.dispose();
> packer = null;
> cachedBackingStore = null;
> cachedGraphics = null;
> cachedFontRenderContext = null;
>
> if (dbgFrame != null) {
> dbgFrame.dispose();
> }
> }
>
> //----------------------------------------------------------------------
> // Internals only below this point
> //
>
> private static Rectangle2D preNormalize(Rectangle2D src) {
> // Need to round to integer coordinates
> // Also give ourselves a little slop around the reported
> // bounds of glyphs because it looks like neither the visual
> // nor the pixel bounds works perfectly well
> int minX = (int) Math.floor(src.getMinX()) - 1;
> int minY = (int) Math.floor(src.getMinY()) - 1;
> int maxX = (int) Math.ceil(src.getMaxX()) + 1;
> int maxY = (int) Math.ceil(src.getMaxY()) + 1;
> return new Rectangle2D.Double(minX, minY, maxX - minX, maxY - minY);
> }
>
>
> private Rectangle2D normalize(Rectangle2D src) {
> // Give ourselves a boundary around each entity on the backing
> // store in order to prevent bleeding of nearby Strings due to
> // the fact that we use linear filtering
>
> // NOTE that this boundary is quite heuristic and is related
> // to how far away in 3D we may view the text --
> // heuristically, 1.5% of the font's height
> int boundary = (int) Math.max(1, 0.015 * font.getSize());
>
> return new Rectangle2D.Double((int) Math.floor(src.getMinX() - boundary),
> (int) Math.floor(src.getMinY() - boundary),
> (int) Math.ceil(src.getWidth() + 2 * boundary),
> (int) Math.ceil(src.getHeight()) + 2 * boundary);
> }
>
> private TextureRenderer getBackingStore() {
> TextureRenderer renderer = (TextureRenderer) packer.getBackingStore();
>
> if (renderer != cachedBackingStore) {
> // Backing store changed since last time; discard any cached Graphics2D
> if (cachedGraphics != null) {
> cachedGraphics.dispose();
> cachedGraphics = null;
> cachedFontRenderContext = null;
> }
>
> cachedBackingStore = renderer;
> }
>
> return cachedBackingStore;
> }
>
> private Graphics2D getGraphics2D() {
> TextureRenderer renderer = getBackingStore();
>
> if (cachedGraphics == null) {
> cachedGraphics = renderer.createGraphics();
>
> // Set up composite, font and rendering hints
> cachedGraphics.setComposite(AlphaComposite.Src);
> cachedGraphics.setColor(Color.WHITE);
> cachedGraphics.setFont(font);
> cachedGraphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
> (antialiased ? RenderingHints.VALUE_TEXT_ANTIALIAS_ON
> : RenderingHints.VALUE_TEXT_ANTIALIAS_OFF));
> cachedGraphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
> (useFractionalMetrics
> ? RenderingHints.VALUE_FRACTIONALMETRICS_ON
> : RenderingHints.VALUE_FRACTIONALMETRICS_OFF));
> }
>
> return cachedGraphics;
> }
>
> private void beginRendering(boolean ortho, int width, int height,
> boolean disableDepthTestForOrtho) {
> if (DEBUG && !debugged) {
> debug();
> }
>
> inBeginEndPair = true;
> isOrthoMode = ortho;
> beginRenderingWidth = width;
> beginRenderingHeight = height;
> beginRenderingDepthTestDisabled = disableDepthTestForOrtho;
>
> if (ortho) {
> getBackingStore().beginOrthoRendering(width, height,
> disableDepthTestForOrtho);
> } else {
> getBackingStore().begin3DRendering();
> }
>
> GL gl = GLU.getCurrentGL();
>
> // Push client attrib bits used by the pipelined quad renderer
> gl.glPushClientAttrib((int) GL.GL_ALL_CLIENT_ATTRIB_BITS);
>
> if (!haveMaxSize) {
> // Query OpenGL for the maximum texture size and set it in the
> // RectanglePacker to keep it from expanding too large
> int[] sz = new int[1];
> gl.glGetIntegerv(GL.GL_MAX_TEXTURE_SIZE, sz, 0);
> packer.setMaxSize(sz[0], sz[0]);
> haveMaxSize = true;
> }
>
> if (needToResetColor && haveCachedColor) {
> if (cachedColor == null) {
> getBackingStore().setColor(cachedR, cachedG, cachedB, cachedA);
> } else {
> getBackingStore().setColor(cachedColor);
> }
>
> needToResetColor = false;
> }
>
> // Disable future attempts to use mipmapping if TextureRenderer
> // doesn't support it
> if (mipmap && !getBackingStore().isUsingAutoMipmapGeneration()) {
> if (DEBUG) {
> System.err.println("Disabled mipmapping in TextRenderer");
> }
>
> mipmap = false;
> }
> }
>
> /**
> * emzic: here the call to glBindBuffer crashes on certain graphicscard/driver combinations
> * this is why the ugly try-catch block has been added, which falls back to the old textrenderer
> * 
> * @param ortho
> * @throws GLException
> */
> private void endRendering(boolean ortho) throws GLException {
> flushGlyphPipeline();
>
> inBeginEndPair = false;
>
> GL gl = GLU.getCurrentGL();
>
> // Pop client attrib bits used by the pipelined quad renderer
> gl.glPopClientAttrib();
>
> // The OpenGL spec is unclear about whether this changes the
> // buffer bindings, so preemptively zero out the GL_ARRAY_BUFFER
> // binding
> if (isVBOAvailable(gl)) {
> try {
> gl.glBindBuffer(GL.GL_ARRAY_BUFFER, 0);
> } catch (Exception e) {
> isExtensionAvailable_VBO = false;
> }
> }
>
> if (ortho) {
> getBackingStore().endOrthoRendering();
> } else {
> getBackingStore().end3DRendering();
> }
>
> if (++numRenderCycles >= CYCLES_PER_FLUSH) {
> numRenderCycles = 0;
>
> if (DEBUG) {
> System.err.println("Clearing unused entries in endRendering()");
> }
>
> clearUnusedEntries();
> }
> }
>
> private void clearUnusedEntries() {
> final java.util.List deadRects = new ArrayList /*<Rect>*/();
>
> // Iterate through the contents of the backing store, removing
> // text strings that haven't been used recently
> packer.visit(new RectVisitor() {
> public void visit(Rect rect) {
> TextData data = (TextData) rect.getUserData();
>
> if (data.used()) {
> data.clearUsed();
> } else {
> deadRects.add(rect);
> }
> }
> });
>
> for (Iterator iter = deadRects.iterator(); iter.hasNext();) {
> Rect r = (Rect) iter.next();
> packer.remove(r);
> stringLocations.remove(((TextData) r.getUserData()).string());
>
> int unicodeToClearFromCache = ((TextData) r.getUserData()).unicodeID;
>
> if (unicodeToClearFromCache > 0) {
> mGlyphProducer.clearCacheEntry(unicodeToClearFromCache);
> }
>
> // if (DEBUG) {
> // Graphics2D g = getGraphics2D();
> // g.setComposite(AlphaComposite.Clear);
> // g.fillRect(r.x(), r.y(), r.w(), r.h());
> // g.setComposite(AlphaComposite.Src);
> // }
> }
>
> // If we removed dead rectangles this cycle, try to do a compaction
> float frag = packer.verticalFragmentationRatio();
>
> if (!deadRects.isEmpty() && (frag > MAX_VERTICAL_FRAGMENTATION)) {
> if (DEBUG) {
> System.err.println(
> "Compacting TextRenderer backing store due to vertical fragmentation " +
> frag);
> }
>
> packer.compact();
> }
>
> if (DEBUG) {
> getBackingStore().markDirty(0, 0, getBackingStore().getWidth(),
> getBackingStore().getHeight());
> }
> }
>
> private void internal_draw3D(CharSequence str, float x, float y, float z,
> float scaleFactor) {
> List/*<Glyph>*/ glyphs = mGlyphProducer.getGlyphs(str);
> for (Iterator iter = glyphs.iterator(); iter.hasNext(); ) {
> Glyph glyph = (Glyph) iter.next();
> float advance = glyph.draw3D(x, y, z, scaleFactor);
> x += advance * scaleFactor;
> }
> }
>
> private void flushGlyphPipeline() {
> if (mPipelinedQuadRenderer != null) {
> mPipelinedQuadRenderer.draw();
> }
> }
>
> private void draw3D_ROBUST(CharSequence str, float x, float y, float z,
> float scaleFactor) {
> String curStr;
> if (str instanceof String) {
> curStr = (String) str;
> } else {
> curStr = str.toString();
> }
>
> // Look up the string on the backing store
> Rect rect = (Rect) stringLocations.get(curStr);
>
> if (rect == null) {
> // Rasterize this string and place it on the backing store
> Graphics2D g = getGraphics2D();
> Rectangle2D origBBox = preNormalize(renderDelegate.getBounds(curStr, font, getFontRenderContext()));
> Rectangle2D bbox = normalize(origBBox);
> Point origin = new Point((int) -bbox.getMinX(),
> (int) -bbox.getMinY());
> rect = new Rect(0, 0, (int) bbox.getWidth(),
> (int) bbox.getHeight(),
> new TextData(curStr, origin, origBBox, -1));
>
> packer.add(rect);
> stringLocations.put(curStr, rect);
>
> // Re-fetch the Graphics2D in case the addition of the rectangle
> // caused the old backing store to be thrown away
> g = getGraphics2D();
>
> // OK, should now have an (x, y) for this rectangle; rasterize
> // the String
> int strx = rect.x() + origin.x;
> int stry = rect.y() + origin.y;
>
> // Clear out the area we're going to draw into
> g.setComposite(AlphaComposite.Clear);
> g.fillRect(rect.x(), rect.y(), rect.w(), rect.h());
> g.setComposite(AlphaComposite.Src);
>
> // Draw the string
> renderDelegate.draw(g, curStr, strx, stry);
>
> if (DRAW_BBOXES) {
> TextData data = (TextData) rect.getUserData();
> // Draw a bounding box on the backing store
> g.drawRect(strx - data.origOriginX(),
> stry - data.origOriginY(),
> (int) data.origRect().getWidth(),
> (int) data.origRect().getHeight());
> g.drawRect(strx - data.origin().x,
> stry - data.origin().y,
> rect.w(),
> rect.h());
> }
>
> // Mark this region of the TextureRenderer as dirty
> getBackingStore().markDirty(rect.x(), rect.y(), rect.w(),
> rect.h());
> }
>
> // OK, now draw the portion of the backing store to the screen
> TextureRenderer renderer = getBackingStore();
>
> // NOTE that the rectangles managed by the packer have their
> // origin at the upper-left but the TextureRenderer's origin is
> // at its lower left!!!
> TextData data = (TextData) rect.getUserData();
> data.markUsed();
>
> Rectangle2D origRect = data.origRect();
> 
> // Align the leftmost point of the baseline to the (x, y, z) coordinate requested
> renderer.draw3DRect(x - (scaleFactor * data.origOriginX()),
> y - (scaleFactor * ((float) origRect.getHeight() - data.origOriginY())), z,
> rect.x() + (data.origin().x - data.origOriginX()),
> renderer.getHeight() - rect.y() - (int) origRect.getHeight() -
> (data.origin().y - data.origOriginY()),
> (int) origRect.getWidth(), (int) origRect.getHeight(), scaleFactor);
> }
>
> //----------------------------------------------------------------------
> // Debugging functionality
> //
> private void debug() {
> dbgFrame = new Frame("TextRenderer Debug Output");
>
> GLCanvas dbgCanvas = new GLCanvas(new GLCapabilities(), null,
> GLContext.getCurrent(), null);
> dbgCanvas.addGLEventListener(new DebugListener(dbgFrame));
> dbgFrame.add(dbgCanvas);
>
> final FPSAnimator anim = new FPSAnimator(dbgCanvas, 10);
> dbgFrame.addWindowListener(new WindowAdapter() {
> public void windowClosing(WindowEvent e) {
> // Run this on another thread than the AWT event queue to
> // make sure the call to Animator.stop() completes before
> // exiting
> new Thread(new Runnable() {
> public void run() {
> anim.stop();
> }
> }).start();
> }
> });
> dbgFrame.setSize(kSize, kSize);
> dbgFrame.setVisible(true);
> anim.start();
> debugged = true;
> }
>
> /** Class supporting more full control over the process of rendering
> the bitmapped text. Allows customization of whether the backing
> store text bitmap is full-color or intensity only, the size of
> each individual rendered text rectangle, and the contents of
> each individual rendered text string. The default implementation
> of this interface uses an intensity-only texture, a
> closely-cropped rectangle around the text, and renders text
> using the color white, which is modulated by the set color
> during the rendering process. */
> public static interface RenderDelegate {
> /** Indicates whether the backing store of this TextRenderer
> should be intensity-only (the default) or full-color. */
> public boolean intensityOnly();
>
> /** Computes the bounds of the given String relative to the
> origin. */
> public Rectangle2D getBounds(String str, Font font,
> FontRenderContext frc);
>
> /** Computes the bounds of the given character sequence relative
> to the origin. */
> public Rectangle2D getBounds(CharSequence str, Font font,
> FontRenderContext frc);
>
> /** Computes the bounds of the given GlyphVector, already
> assumed to have been created for a particular Font,
> relative to the origin. */
> public Rectangle2D getBounds(GlyphVector gv, FontRenderContext frc);
>
> /** Render the passed character sequence at the designated
> location using the supplied Graphics2D instance. The
> surrounding region will already have been cleared to the RGB
> color (0, 0, 0) with zero alpha. The initial drawing context
> of the passed Graphics2D will be set to use
> AlphaComposite.Src, the color white, the Font specified in the
> TextRenderer's constructor, and the rendering hints specified
> in the TextRenderer constructor. Changes made by the end user
> may be visible in successive calls to this method, but are not
> guaranteed to be preserved. Implementors of this method
> should reset the Graphics2D's state to that desired each time
> this method is called, in particular those states which are
> not the defaults. */
> public void draw(Graphics2D graphics, String str, int x, int y);
>
> /** Render the passed GlyphVector at the designated location using
> the supplied Graphics2D instance. The surrounding region will
> already have been cleared to the RGB color (0, 0, 0) with zero
> alpha. The initial drawing context of the passed Graphics2D
> will be set to use AlphaComposite.Src, the color white, the
> Font specified in the TextRenderer's constructor, and the
> rendering hints specified in the TextRenderer constructor.
> Changes made by the end user may be visible in successive
> calls to this method, but are not guaranteed to be preserved.
> Implementors of this method should reset the Graphics2D's
> state to that desired each time this method is called, in
> particular those states which are not the defaults. */
> public void drawGlyphVector(Graphics2D graphics, GlyphVector str,
> int x, int y);
> }
>
> private static class CharSequenceIterator implements CharacterIterator {
> CharSequence mSequence;
> int mLength;
> int mCurrentIndex;
>
> CharSequenceIterator() {
> }
>
> CharSequenceIterator(CharSequence sequence) {
> initFromCharSequence(sequence);
> }
>
> public void initFromCharSequence(CharSequence sequence) {
> mSequence = sequence;
> mLength = mSequence.length();
> mCurrentIndex = 0;
> }
>
> public char last() {
> mCurrentIndex = Math.max(0, mLength - 1);
>
> return current();
> }
>
> public char current() {
> if ((mLength == 0) || (mCurrentIndex >= mLength)) {
> return CharacterIterator.DONE;
> }
>
> return mSequence.charAt(mCurrentIndex);
> }
>
> public char next() {
> mCurrentIndex++;
>
> return current();
> }
>
> public char previous() {
> mCurrentIndex = Math.max(mCurrentIndex - 1, 0);
>
> return current();
> }
>
> public char setIndex(int position) {
> mCurrentIndex = position;
>
> return current();
> }
>
> public int getBeginIndex() {
> return 0;
> }
>
> public int getEndIndex() {
> return mLength;
> }
>
> public int getIndex() {
> return mCurrentIndex;
> }
>
> public Object clone() {
> CharSequenceIterator iter = new CharSequenceIterator(mSequence);
> iter.mCurrentIndex = mCurrentIndex;
>
> return iter;
> }
>
> public char first() {
> if (mLength == 0) {
> return CharacterIterator.DONE;
> }
>
> mCurrentIndex = 0;
>
> return current();
> }
> }
>
> // Data associated with each rectangle of text
> static class TextData {
> // Back-pointer to String this TextData describes, if it
> // represents a String rather than a single glyph
> private String str;
>
> // If this TextData represents a single glyph, this is its
> // unicode ID
> int unicodeID;
>
> // The following must be defined and used VERY precisely. This is
> // the offset from the upper-left corner of this rectangle (Java
> // 2D coordinate system) at which the string must be rasterized in
> // order to fit within the rectangle -- the leftmost point of the
> // baseline.
> private Point origin;
>
> // This represents the pre-normalized rectangle, which fits
> // within the rectangle on the backing store. We keep a
> // one-pixel border around entries on the backing store to
> // prevent bleeding of adjacent letters when using GL_LINEAR
> // filtering for rendering. The origin of this rectangle is
> // equivalent to the origin above.
> private Rectangle2D origRect;
>
> private boolean used; // Whether this text was used recently
>
> TextData(String str, Point origin, Rectangle2D origRect, int unicodeID) {
> this.str = str;
> this.origin = origin;
> this.origRect = origRect;
> this.unicodeID = unicodeID;
> }
>
> String string() {
> return str;
> }
>
> Point origin() {
> return origin;
> }
>
> // The following three methods are used to locate the glyph
> // within the expanded rectangle coming from normalize()
> int origOriginX() {
> return (int) -origRect.getMinX();
> }
>
> int origOriginY() {
> return (int) -origRect.getMinY();
> }
>
> Rectangle2D origRect() {
> return origRect;
> }
>
> boolean used() {
> return used;
> }
>
> void markUsed() {
> used = true;
> }
>
> void clearUsed() {
> used = false;
> }
> }
>
> class Manager implements BackingStoreManager {
> private Graphics2D g;
>
> public Object allocateBackingStore(int w, int h) {
> // FIXME: should consider checking Font's attributes to see
> // whether we're likely to need to support a full RGBA backing
> // store (i.e., non-default Paint, foreground color, etc.), but
> // for now, let's just be more efficient
> TextureRenderer renderer;
>
> if (renderDelegate.intensityOnly()) {
> renderer = TextureRenderer.createAlphaOnlyRenderer(w, h, mipmap);
> } else {
> renderer = new TextureRenderer(w, h, true, mipmap);
> }
> renderer.setSmoothing(smoothing);
>
> if (DEBUG) {
> System.err.println(" TextRenderer allocating backing store " +
> w + " x " + h);
> }
>
> return renderer;
> }
>
> public void deleteBackingStore(Object backingStore) {
> ((TextureRenderer) backingStore).dispose();
> }
>
> public boolean preExpand(Rect cause, int attemptNumber) {
> // Only try this one time; clear out potentially obsolete entries
> // NOTE: this heuristic and the fact that it clears the used bit
> // of all entries seems to cause cycling of entries in some
> // situations, where the backing store becomes small compared to
> // the amount of text on the screen (see the TextFlow demo) and
> // the entries continually cycle in and out of the backing
> // store, decreasing performance. If we added a little age
> // information to the entries, and only cleared out entries
> // above a certain age, this behavior would be eliminated.
> // However, it seems the system usually stabilizes itself, so
> // for now we'll just keep things simple. Note that if we don't
> // clear the used bit here, the backing store tends to increase
> // very quickly to its maximum size, at least with the TextFlow
> // demo when the text is being continually re-laid out.
> if (attemptNumber == 0) {
> if (DEBUG) {
> System.err.println(
> "Clearing unused entries in preExpand(): attempt number " +
> attemptNumber);
> }
>
> if (inBeginEndPair) {
> // Draw any outstanding glyphs
> flush();
> }
>
> clearUnusedEntries();
>
> return true;
> }
>
> return false;
> }
>
> public void additionFailed(Rect cause, int attemptNumber) {
> // Heavy hammer -- might consider doing something different
> packer.clear();
> stringLocations.clear();
> mGlyphProducer.clearAllCacheEntries();
>
> if (DEBUG) {
> System.err.println(
> " *** Cleared all text because addition failed ***");
> }
> }
>
> public void beginMovement(Object oldBackingStore, Object newBackingStore) {
> // Exit the begin / end pair if necessary
> if (inBeginEndPair) {
> // Draw any outstanding glyphs
> flush();
>
> GL gl = GLU.getCurrentGL();
>
> // Pop client attrib bits used by the pipelined quad renderer
> gl.glPopClientAttrib();
>
> // The OpenGL spec is unclear about whether this changes the
> // buffer bindings, so preemptively zero out the GL_ARRAY_BUFFER
> // binding
> if (isVBOAvailable(gl)) {
> try {
> gl.glBindBuffer(GL.GL_ARRAY_BUFFER, 0);
> } catch (Exception e) {
> isExtensionAvailable_VBO = false;
> }
> }
>
> if (isOrthoMode) {
> ((TextureRenderer) oldBackingStore).endOrthoRendering();
> } else {
> ((TextureRenderer) oldBackingStore).end3DRendering();
> }
> }
>
> TextureRenderer newRenderer = (TextureRenderer) newBackingStore;
> g = newRenderer.createGraphics();
> }
>
> public void move(Object oldBackingStore, Rect oldLocation,
> Object newBackingStore, Rect newLocation) {
> TextureRenderer oldRenderer = (TextureRenderer) oldBackingStore;
> TextureRenderer newRenderer = (TextureRenderer) newBackingStore;
>
> if (oldRenderer == newRenderer) {
> // Movement on the same backing store -- easy case
> g.copyArea(oldLocation.x(), oldLocation.y(), oldLocation.w(),
> oldLocation.h(), newLocation.x() - oldLocation.x(),
> newLocation.y() - oldLocation.y());
> } else {
> // Need to draw from the old renderer's image into the new one
> Image img = oldRenderer.getImage();
> g.drawImage(img, newLocation.x(), newLocation.y(),
> newLocation.x() + newLocation.w(),
> newLocation.y() + newLocation.h(), oldLocation.x(),
> oldLocation.y(), oldLocation.x() + oldLocation.w(),
> oldLocation.y() + oldLocation.h(), null);
> }
> }
>
> public void endMovement(Object oldBackingStore, Object newBackingStore) {
> g.dispose();
>
> // Sync the whole surface
> TextureRenderer newRenderer = (TextureRenderer) newBackingStore;
> newRenderer.markDirty(0, 0, newRenderer.getWidth(),
> newRenderer.getHeight());
>
> // Re-enter the begin / end pair if necessary
> if (inBeginEndPair) {
> if (isOrthoMode) {
> ((TextureRenderer) newBackingStore).beginOrthoRendering(beginRenderingWidth,
> beginRenderingHeight, beginRenderingDepthTestDisabled);
> } else {
> ((TextureRenderer) newBackingStore).begin3DRendering();
> }
>
> // Push client attrib bits used by the pipelined quad renderer
> GL gl = GLU.getCurrentGL();
> gl.glPushClientAttrib((int) GL.GL_ALL_CLIENT_ATTRIB_BITS);
>
> if (haveCachedColor) {
> if (cachedColor == null) {
> ((TextureRenderer) newBackingStore).setColor(cachedR,
> cachedG, cachedB, cachedA);
> } else {
> ((TextureRenderer) newBackingStore).setColor(cachedColor);
> }
> }
> } else {
> needToResetColor = true;
> }
> }
> }
>
> public static class DefaultRenderDelegate implements RenderDelegate {
> public boolean intensityOnly() {
> return true;
> }
>
> public Rectangle2D getBounds(CharSequence str, Font font,
> FontRenderContext frc) {
> return getBounds(font.createGlyphVector(frc,
> new CharSequenceIterator(str)),
> frc);
> }
>
> public Rectangle2D getBounds(String str, Font font,
> FontRenderContext frc) {
> return getBounds(font.createGlyphVector(frc, str), frc);
> }
>
> public Rectangle2D getBounds(GlyphVector gv, FontRenderContext frc) {
> return gv.getVisualBounds();
> }
>
> public void drawGlyphVector(Graphics2D graphics, GlyphVector str,
> int x, int y) {
> graphics.drawGlyphVector(str, x, y);
> }
>
> public void draw(Graphics2D graphics, String str, int x, int y) {
> graphics.drawString(str, x, y);
> }
> }
>
> //----------------------------------------------------------------------
> // Glyph-by-glyph rendering support
> //
>
> // A temporary to prevent excessive garbage creation
> private char[] singleUnicode = new char[1];
>
> /** A Glyph represents either a single unicode glyph or a
> substring of characters to be drawn. The reason for the dual
> behavior is so that we can take in a sequence of unicode
> characters and partition them into runs of individual glyphs,
> but if we encounter complex text and/or unicode sequences we
> don't understand, we can render them using the
> string-by-string method. 
>
> Glyphs need to be able to re-upload themselves to the backing
> store on demand as we go along in the render sequence.
> */
>
> class Glyph {
> // If this Glyph represents an individual unicode glyph, this
> // is its unicode ID. If it represents a String, this is -1.
> private int unicodeID;
> // If the above field isn't -1, then these fields are used.
> // The glyph code in the font
> private int glyphCode;
> // The GlyphProducer which created us
> private GlyphProducer producer;
> // The advance of this glyph
> private float advance;
> // The GlyphVector for this single character; this is passed
> // in during construction but cleared during the upload
> // process
> private GlyphVector singleUnicodeGlyphVector;
> // The rectangle of this glyph on the backing store, or null
> // if it has been cleared due to space pressure
> private Rect glyphRectForTextureMapping;
> // If this Glyph represents a String, this is the sequence of
> // characters
> private String str;
> // Whether we need a valid advance when rendering this string
> // (i.e., whether it has other single glyphs coming after it)
> private boolean needAdvance;
>
> // Creates a Glyph representing an individual Unicode character
> public Glyph(int unicodeID,
> int glyphCode,
> float advance,
> GlyphVector singleUnicodeGlyphVector,
> GlyphProducer producer) {
> this.unicodeID = unicodeID;
> this.glyphCode = glyphCode;
> this.advance = advance;
> this.singleUnicodeGlyphVector = singleUnicodeGlyphVector;
> this.producer = producer;
> }
>
> // Creates a Glyph representing a sequence of characters, with
> // an indication of whether additional single glyphs are being
> // rendered after it
> public Glyph(String str, boolean needAdvance) {
> this.str = str;
> this.needAdvance = needAdvance;
> }
>
> /** Returns this glyph's unicode ID */
> public int getUnicodeID() {
> return unicodeID;
> }
>
> /** Returns this glyph's (font-specific) glyph code */
> public int getGlyphCode() {
> return glyphCode;
> }
>
> /** Returns the advance for this glyph */
> public float getAdvance() {
> return advance;
> }
>
> /** Draws this glyph and returns the (x) advance for this glyph */
> public float draw3D(float inX, float inY, float z, float scaleFactor) {
> if (str != null) {
> draw3D_ROBUST(str, inX, inY, z, scaleFactor);
> if (!needAdvance) {
> return 0;
> }
> // Compute and return the advance for this string
> GlyphVector gv = font.createGlyphVector(getFontRenderContext(), str);
> float totalAdvance = 0;
> for (int i = 0; i < gv.getNumGlyphs(); i++) {
> totalAdvance += gv.getGlyphMetrics(i).getAdvance();
> }
> return totalAdvance;
> }
>
> // This is the code path taken for individual glyphs
> if (glyphRectForTextureMapping == null) {
> upload();
> }
>
> try {
> if (mPipelinedQuadRenderer == null) {
> mPipelinedQuadRenderer = new Pipelined_QuadRenderer();
> }
>
> TextureRenderer renderer = getBackingStore();
> // Handles case where NPOT texture is used for backing store
> TextureCoords wholeImageTexCoords = renderer.getTexture().getImageTexCoords();
> float xScale = wholeImageTexCoords.right();
> float yScale = wholeImageTexCoords.bottom();
>
> Rect rect = glyphRectForTextureMapping;
> TextData data = (TextData) rect.getUserData();
> data.markUsed();
>
> Rectangle2D origRect = data.origRect();
>
> float x = inX - (scaleFactor * data.origOriginX());
> float y = inY - (scaleFactor * ((float) origRect.getHeight() - data.origOriginY()));
>
> int texturex = rect.x() + (data.origin().x - data.origOriginX());
> int texturey = renderer.getHeight() - rect.y() - (int) origRect.getHeight() -
> (data.origin().y - data.origOriginY());
> int width = (int) origRect.getWidth();
> int height = (int) origRect.getHeight();
>
> float tx1 = xScale * (float) texturex / (float) renderer.getWidth();
> float ty1 = yScale * (1.0f -
> ((float) texturey / (float) renderer.getHeight()));
> float tx2 = xScale * (float) (texturex + width) / (float) renderer.getWidth();
> float ty2 = yScale * (1.0f -
> ((float) (texturey + height) / (float) renderer.getHeight()));
>
> mPipelinedQuadRenderer.glTexCoord2f(tx1, ty1);
> mPipelinedQuadRenderer.glVertex3f(x, y, z);
> mPipelinedQuadRenderer.glTexCoord2f(tx2, ty1);
> mPipelinedQuadRenderer.glVertex3f(x + (width * scaleFactor), y,
> z);
> mPipelinedQuadRenderer.glTexCoord2f(tx2, ty2);
> mPipelinedQuadRenderer.glVertex3f(x + (width * scaleFactor),
> y + (height * scaleFactor), z);
> mPipelinedQuadRenderer.glTexCoord2f(tx1, ty2);
> mPipelinedQuadRenderer.glVertex3f(x,
> y + (height * scaleFactor), z);
> } catch (Exception e) {
> e.printStackTrace();
> }
> return advance;
> }
>
> /** Notifies this glyph that it's been cleared out of the cache */
> public void clear() {
> glyphRectForTextureMapping = null;
> }
>
> private void upload() {
> GlyphVector gv = getGlyphVector();
> Rectangle2D origBBox = preNormalize(renderDelegate.getBounds(gv, getFontRenderContext()));
> Rectangle2D bbox = normalize(origBBox);
> Point origin = new Point((int) -bbox.getMinX(),
> (int) -bbox.getMinY());
> Rect rect = new Rect(0, 0, (int) bbox.getWidth(),
> (int) bbox.getHeight(),
> new TextData(null, origin, origBBox, unicodeID));
> packer.add(rect);
> glyphRectForTextureMapping = rect;
> Graphics2D g = getGraphics2D();
> // OK, should now have an (x, y) for this rectangle; rasterize
> // the glyph
> int strx = rect.x() + origin.x;
> int stry = rect.y() + origin.y;
>
> // Clear out the area we're going to draw into
> g.setComposite(AlphaComposite.Clear);
> g.fillRect(rect.x(), rect.y(), rect.w(), rect.h());
> g.setComposite(AlphaComposite.Src);
>
> // Draw the string
> renderDelegate.drawGlyphVector(g, gv, strx, stry);
>
> if (DRAW_BBOXES) {
> TextData data = (TextData) rect.getUserData();
> // Draw a bounding box on the backing store
> g.drawRect(strx - data.origOriginX(),
> stry - data.origOriginY(),
> (int) data.origRect().getWidth(),
> (int) data.origRect().getHeight());
> g.drawRect(strx - data.origin().x,
> stry - data.origin().y,
> rect.w(),
> rect.h());
> }
>
> // Mark this region of the TextureRenderer as dirty
> getBackingStore().markDirty(rect.x(), rect.y(), rect.w(),
> rect.h());
> // Re-register ourselves with our producer
> producer.register(this);
> }
>
> private GlyphVector getGlyphVector() {
> GlyphVector gv = singleUnicodeGlyphVector;
> if (gv != null) {
> singleUnicodeGlyphVector = null; // Don't need this anymore
> return gv;
> }
> singleUnicode[0] = (char) unicodeID;
> return font.createGlyphVector(getFontRenderContext(), singleUnicode);
> }
> }
>
> class GlyphProducer {
> final int undefined = -2;
> FontRenderContext fontRenderContext;
> List/*<Glyph>*/ glyphsOutput = new ArrayList/*<Glyph>*/();
> // The mapping from unicode character to font-specific glyph ID
> int[] unicodes2Glyphs;
> // The mapping from glyph ID to Glyph
> Glyph[] glyphCache;
> // We re-use this for each incoming string
> CharSequenceIterator iter = new CharSequenceIterator();
>
> GlyphProducer(int fontLengthInGlyphs) {
> unicodes2Glyphs = new int[512];
> glyphCache = new Glyph[fontLengthInGlyphs];
> clearAllCacheEntries();
> }
>
> public List/*<Glyph>*/ getGlyphs(CharSequence inString) {
> glyphsOutput.clear();
> iter.initFromCharSequence(inString);
> GlyphVector fullRunGlyphVector = font.createGlyphVector(getFontRenderContext(),
> iter);
> boolean complex = (fullRunGlyphVector.getLayoutFlags() != 0);
> if (complex || DISABLE_GLYPH_CACHE) {
> // Punt to the robust version of the renderer
> glyphsOutput.add(new Glyph(inString.toString(), false));
> return glyphsOutput;
> }
>
> int lengthInGlyphs = fullRunGlyphVector.getNumGlyphs();
> int i = 0;
> while (i < lengthInGlyphs) {
> Glyph glyph = getGlyph(inString, fullRunGlyphVector, i);
> if (glyph != null) {
> glyphsOutput.add(glyph);
> i++;
> } else {
> // Assemble a run of characters that don't fit in
> // the cache
> StringBuffer buf = new StringBuffer();
> while (i < lengthInGlyphs &&
> getGlyph(inString, fullRunGlyphVector, i) == null) {
> buf.append(inString.charAt(i++));
> }
> glyphsOutput.add(new Glyph(buf.toString(),
> // Any more glyphs after this run?
> i < lengthInGlyphs));
> }
> }
> return glyphsOutput;
> }
>
> public void clearCacheEntry(int unicodeID) {
> int glyphID = unicodes2Glyphs[unicodeID];
> if (glyphID != undefined) {
> Glyph glyph = glyphCache[glyphID];
> if (glyph != null) {
> glyph.clear();
> }
> glyphCache[glyphID] = null;
> }
> unicodes2Glyphs[unicodeID] = undefined;
> }
>
> public void clearAllCacheEntries() {
> for (int i = 0; i < unicodes2Glyphs.length; i++) {
> clearCacheEntry(i);
> }
> }
>
> public void register(Glyph glyph) {
> unicodes2Glyphs[glyph.getUnicodeID()] = glyph.getGlyphCode();
> glyphCache[glyph.getGlyphCode()] = glyph;
> }
>
> public float getGlyphPixelWidth(char unicodeID) {
> Glyph glyph = getGlyph(unicodeID);
> if (glyph != null) {
> return glyph.getAdvance();
> }
>
> // Have to do this the hard / uncached way
> singleUnicode[0] = unicodeID;
> GlyphVector gv = font.createGlyphVector(fontRenderContext,
> singleUnicode);
> return gv.getGlyphMetrics(0).getAdvance();
> }
>
> // Returns a glyph object for this single glyph. Returns null
> // if the unicode or glyph ID would be out of bounds of the
> // glyph cache.
> private Glyph getGlyph(CharSequence inString,
> GlyphVector fullRunGlyphVector,
> int index) {
> char unicodeID = inString.charAt(index);
>
> if (unicodeID >= unicodes2Glyphs.length) {
> return null;
> }
>
> int glyphID = unicodes2Glyphs[unicodeID];
> if (glyphID != undefined) {
> return glyphCache[glyphID];
> }
>
> // Must fabricate the glyph
> singleUnicode[0] = unicodeID;
> GlyphVector gv = font.createGlyphVector(getFontRenderContext(), singleUnicode);
> return getGlyph(unicodeID, gv, fullRunGlyphVector.getGlyphMetrics(index));
> }
>
> // It's unclear whether this variant might produce less
> // optimal results than if we can see the entire GlyphVector
> // for the incoming string
> private Glyph getGlyph(int unicodeID) {
> if (unicodeID >= unicodes2Glyphs.length) {
> return null;
> }
>
> int glyphID = unicodes2Glyphs[unicodeID];
> if (glyphID != undefined) {
> return glyphCache[glyphID];
> }
> singleUnicode[0] = (char) unicodeID;
> GlyphVector gv = font.createGlyphVector(getFontRenderContext(), singleUnicode);
> return getGlyph(unicodeID, gv, gv.getGlyphMetrics(0));
> }
>
> private Glyph getGlyph(int unicodeID,
> GlyphVector singleUnicodeGlyphVector,
> GlyphMetrics metrics) {
> int glyphCode = singleUnicodeGlyphVector.getGlyphCode(0);
> // Have seen huge glyph codes (65536) coming out of some fonts in some Unicode situations
> if (glyphCode >= glyphCache.length) {
> return null;
> }
> Glyph glyph = new Glyph(unicodeID,
> glyphCode,
> metrics.getAdvance(),
> singleUnicodeGlyphVector,
> this);
> register(glyph);
> return glyph;
> }
> }
>
> class Pipelined_QuadRenderer {
> int mOutstandingGlyphsVerticesPipeline = 0;
> FloatBuffer mTexCoords;
> FloatBuffer mVertCoords;
> boolean usingVBOs;
> int mVBO_For_ResuableTileVertices;
> int mVBO_For_ResuableTileTexCoords;
>
> Pipelined_QuadRenderer() {
> GL gl = GLU.getCurrentGL();
> mVertCoords = BufferUtil.newFloatBuffer(kTotalBufferSizeCoordsVerts);
> mTexCoords = BufferUtil.newFloatBuffer(kTotalBufferSizeCoordsTex);
>
> usingVBOs = isVBOAvailable(gl);
>
> if (usingVBOs) {
> try {
> int[] vbos = new int[2];
> gl.glGenBuffers(2, IntBuffer.wrap(vbos));
>
> mVBO_For_ResuableTileVertices = vbos[0];
> mVBO_For_ResuableTileTexCoords = vbos[1];
>
> gl.glBindBuffer(GL.GL_ARRAY_BUFFER,
> mVBO_For_ResuableTileVertices);
> gl.glBufferData(GL.GL_ARRAY_BUFFER, kTotalBufferSizeBytesVerts,
> null, GL.GL_STREAM_DRAW); // stream draw because this is a single quad use pipeline
>
> gl.glBindBuffer(GL.GL_ARRAY_BUFFER,
> mVBO_For_ResuableTileTexCoords);
> gl.glBufferData(GL.GL_ARRAY_BUFFER, kTotalBufferSizeBytesTex,
> null, GL.GL_STREAM_DRAW); // stream draw because this is a single quad use pipeline
> } catch (Exception e) {
> isExtensionAvailable_VBO = false;
> usingVBOs = false;
> }
> }
> }
>
> public void glTexCoord2f(float v, float v1) {
> mTexCoords.put(v);
> mTexCoords.put(v1);
> }
>
> public void glVertex3f(float inX, float inY, float inZ) {
> mVertCoords.put(inX);
> mVertCoords.put(inY);
> mVertCoords.put(inZ);
>
> mOutstandingGlyphsVerticesPipeline++;
>
> if (mOutstandingGlyphsVerticesPipeline >= kTotalBufferSizeVerts) {
> this.draw();
> }
> }
>
> private void draw() {
> if (useVertexArrays) {
> drawVertexArrays();
> } else {
> drawIMMEDIATE();
> }
> }
>
> private void drawVertexArrays() {
> if (mOutstandingGlyphsVerticesPipeline > 0) {
> GL gl = GLU.getCurrentGL();
>
> TextureRenderer renderer = getBackingStore();
> Texture texture = renderer.getTexture(); // triggers texture uploads. Maybe this should be more obvious?
>
> mVertCoords.rewind();
> mTexCoords.rewind();
>
> gl.glEnableClientState(GL.GL_VERTEX_ARRAY);
>
> if (usingVBOs) {
> gl.glBindBuffer(GL.GL_ARRAY_BUFFER,
> mVBO_For_ResuableTileVertices);
> gl.glBufferSubData(GL.GL_ARRAY_BUFFER, 0,
> mOutstandingGlyphsVerticesPipeline * kSizeInBytes_OneVertices_VertexData,
> mVertCoords); // upload only the new stuff
> gl.glVertexPointer(3, GL.GL_FLOAT, 0, 0);
> } else {
> gl.glVertexPointer(3, GL.GL_FLOAT, 0, mVertCoords);
> }
>
> gl.glEnableClientState(GL.GL_TEXTURE_COORD_ARRAY);
>
> if (usingVBOs) {
> gl.glBindBuffer(GL.GL_ARRAY_BUFFER,
> mVBO_For_ResuableTileTexCoords);
> gl.glBufferSubData(GL.GL_ARRAY_BUFFER, 0,
> mOutstandingGlyphsVerticesPipeline * kSizeInBytes_OneVertices_TexData,
> mTexCoords); // upload only the new stuff
> gl.glTexCoordPointer(2, GL.GL_FLOAT, 0, 0);
> } else {
> gl.glTexCoordPointer(2, GL.GL_FLOAT, 0, mTexCoords);
> }
>
> gl.glDrawArrays(GL.GL_QUADS, 0,
> mOutstandingGlyphsVerticesPipeline);
>
> mVertCoords.rewind();
> mTexCoords.rewind();
> mOutstandingGlyphsVerticesPipeline = 0;
> }
> }
>
> private void drawIMMEDIATE() {
> if (mOutstandingGlyphsVerticesPipeline > 0) {
> TextureRenderer renderer = getBackingStore();
> Texture texture = renderer.getTexture(); // triggers texture uploads. Maybe this should be more obvious?
>
> GL gl = GLU.getCurrentGL();
> gl.glBegin(GL.GL_QUADS);
>
> try {
> int numberOfQuads = mOutstandingGlyphsVerticesPipeline / 4;
> mVertCoords.rewind();
> mTexCoords.rewind();
>
> for (int i = 0; i < numberOfQuads; i++) {
> gl.glTexCoord2f(mTexCoords.get(), mTexCoords.get());
> gl.glVertex3f(mVertCoords.get(), mVertCoords.get(),
> mVertCoords.get());
>
> gl.glTexCoord2f(mTexCoords.get(), mTexCoords.get());
> gl.glVertex3f(mVertCoords.get(), mVertCoords.get(),
> mVertCoords.get());
>
> gl.glTexCoord2f(mTexCoords.get(), mTexCoords.get());
> gl.glVertex3f(mVertCoords.get(), mVertCoords.get(),
> mVertCoords.get());
>
> gl.glTexCoord2f(mTexCoords.get(), mTexCoords.get());
> gl.glVertex3f(mVertCoords.get(), mVertCoords.get(),
> mVertCoords.get());
> }
> } catch (Exception e) {
> e.printStackTrace();
> } finally {
> gl.glEnd();
> mVertCoords.rewind();
> mTexCoords.rewind();
> mOutstandingGlyphsVerticesPipeline = 0;
> }
> }
> }
> }
>
> class DebugListener implements GLEventListener {
> private GLU glu = new GLU();
> private Frame frame;
>
> DebugListener(Frame frame) {
> this.frame = frame;
> }
>
> public void display(GLAutoDrawable drawable) {
> GL gl = drawable.getGL();
> gl.glClear(GL.GL_DEPTH_BUFFER_BIT | GL.GL_COLOR_BUFFER_BIT);
>
> if (packer == null) {
> return;
> }
>
> TextureRenderer rend = getBackingStore();
> final int w = rend.getWidth();
> final int h = rend.getHeight();
> rend.beginOrthoRendering(w, h);
> rend.drawOrthoRect(0, 0);
> rend.endOrthoRendering();
>
> if ((frame.getWidth() != w) || (frame.getHeight() != h)) {
> EventQueue.invokeLater(new Runnable() {
> public void run() {
> frame.setSize(w, h);
> }
> });
> }
> }
>
> // Unused methods
> public void init(GLAutoDrawable drawable) {
> }
>
> public void reshape(GLAutoDrawable drawable, int x, int y, int width,
> int height) {
> }
>
> public void displayChanged(GLAutoDrawable drawable,
> boolean modeChanged, boolean deviceChanged) {
> }
> }
>
> /**
> * Sets whether vertex arrays are being used internally for
> * rendering, or whether text is rendered using the OpenGL
> * immediate mode commands. This is provided as a concession for
> * certain graphics cards which have poor vertex array
> * performance. Defaults to true.
> */
> public void setUseVertexArrays(boolean useVertexArrays) {
> this.useVertexArrays = useVertexArrays;
> }
>
> /**
> * Indicates whether vertex arrays are being used internally for
> * rendering, or whether text is rendered using the OpenGL
> * immediate mode commands. Defaults to true.
> */
> public boolean getUseVertexArrays() {
> return useVertexArrays;
> }
>
> /**
> * Sets whether smoothing (i.e., GL_LINEAR filtering) is enabled
> * in the backing TextureRenderer of this TextRenderer. A few
> * graphics cards do not behave well when this is enabled,
> * resulting in fuzzy text. Defaults to true.
> */
> public void setSmoothing(boolean smoothing) {
> this.smoothing = smoothing;
> getBackingStore().setSmoothing(smoothing);
> }
>
> /**
> * Indicates whether smoothing is enabled in the backing
> * TextureRenderer of this TextRenderer. A few graphics cards do
> * not behave well when this is enabled, resulting in fuzzy text.
> * Defaults to true.
> */
> public boolean getSmoothing() {
> return smoothing;
> }
>
> private boolean isVBOAvailable(GL gl) {
> if (!checkFor_isExtensionAvailable_VBO) {
> isExtensionAvailable_VBO = gl.isExtensionAvailable("GL_VERSION_1_5");
>	 /**
>	 * GL_ARB_vertex_buffer_object is available in OpenGL 1.4. Mixing 
>	 * vertex arrays and VBO can cause some problems when calling 
>	 * glVertexPointer from the TextRenderer whereas glBindBufferARB
>	 * was called before in order to bind a VBO because no VBO 
>	 * must be already bound when calling glVertexPointer with a NIO 
>	 * buffer as last argument.
>	 * We cannot ask the programmers to explicitly unbind their VBOs
>	 * to avoid this problem because it has an important cost 
>	 * especially for static VBOs.
>	 */
>	 if (!isExtensionAvailable_VBO) {
>	 if (gl.isExtensionAvailable("GL_VERSION_1_4")) {
>		 if (gl.isExtensionAvailable("GL_ARB_vertex_buffer_object") 
>		 && gl.isFunctionAvailable("glBindBufferARB")
>			&& gl.isFunctionAvailable("glBufferDataARB")
>			&& gl.isFunctionAvailable("glGenBuffersARB")) {
>			isExtensionAvailable_VBO = true;
>	 }
>		}
>	 }
> checkFor_isExtensionAvailable_VBO = true;
> }
> return isExtensionAvailable_VBO;
> }
>}

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