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JavaTextRenderer.javaAPI DocAndroid 1.5 API10740Wed May 06 22:41:54 BST 2009org.apache.harmony.awt.gl.render

JavaTextRenderer

public class JavaTextRenderer extends org.apache.harmony.awt.gl.TextRenderer
author
Ilya S. Okomin
version
$Revision$

Fields Summary
public static final JavaTextRenderer
inst
Constructors Summary
Methods Summary
public voiddrawClipGlyphVector(java.awt.image.WritableRaster raster, java.lang.Object color, java.awt.font.GlyphVector glyphVector, int x, int y, int cMinX, int cMinY, int cMaxX, int cMaxY)
Draws string on specified raster at desired position.

param
raster specified WritableRaster to draw at
param
color color of the text
param
glyphVector GlyphVector object to draw
param
x start X position to draw
param
y start Y position to draw
param
cMinX minimum x of the raster area to draw
param
cMinY minimum y of the raster area to draw
param
cMaxX maximum x of the raster area to draw
param
cMaxY maximum y of the raster area to draw

        // TODO: implement complex clipping

        int xSrcSurf, ySrcSurf; // Start point in String rectangle
        int xDstSurf, yDstSurf; // Start point in Surface rectangle
        int clWidth, clHeight;

        for (int i = 0; i < glyphVector.getNumGlyphs(); i++) {
            Glyph gl = ((CommonGlyphVector) glyphVector).vector[i];

            if (gl.getPointWidth() == 0) {
                continue;
            }

            byte[] data = gl.getBitmap();
            if (data != null) {
                Point2D pos = glyphVector.getGlyphPosition(i);

                xSrcSurf = 0;//gl.bmp_left;
                ySrcSurf = 0;//gl.bmp_rows - gl.bmp_top;

                xDstSurf = x + (int)pos.getX() + (int) gl.getGlyphPointMetrics().getLSB();// + gl.bmp_left;
                yDstSurf = y - gl.bmp_top/*getPointHeight()*/  + (int) pos.getY();// - (gl.bmp_rows-gl.bmp_top);

                int textWidth = gl.bmp_width;
                int textHeight = gl.getPointHeight();

                // if Regions don't intersect
                if ((xDstSurf > cMaxX) || (yDstSurf > cMaxY) || (xDstSurf + textWidth < cMinX)
                        || (yDstSurf + textHeight < cMinY)) {
                    // Nothing to do
                } else {
                    if (xDstSurf >= cMinX) {
                        clWidth = Math.min(textWidth, cMaxX - xDstSurf);
                    } else {
                        xSrcSurf += cMinX - xDstSurf;
                        clWidth = Math.min(cMaxX - cMinX, textWidth - (cMinX - xDstSurf));
                        xDstSurf = cMinX;
                    }
                    if (yDstSurf >= cMinY) {
                        clHeight = Math.min(textHeight, cMaxY - yDstSurf);
                    } else {
                        ySrcSurf += cMinY - yDstSurf;
                        clHeight = Math.min(cMaxY - cMinY, textHeight - (cMinY - yDstSurf));
                        yDstSurf = cMinY;
                    }
                    //     Drawing on the Raster
                    for (int h=0; h<clHeight; h++){
                        for (int w=0; w < clWidth ; w++) {
                            byte currByte = data[(ySrcSurf + h)*gl.bmp_pitch + (xSrcSurf+w)/8];
                            boolean emptyByte = ((currByte & (1 << (7 - ((xSrcSurf+w) % 8)))) != 0);
                            if (emptyByte) {
                                raster.setDataElements(xDstSurf+w, yDstSurf+h, color);
                            } else {
                                // Nothing to do
                            }
                        }
                    }
                }
            }
        }
public voiddrawClipString(java.awt.image.WritableRaster raster, java.lang.Object color, java.lang.String str, org.apache.harmony.awt.gl.font.FontPeerImpl font, int x, int y, int cMinX, int cMinY, int cMaxX, int cMaxY)
Draws string on specified raster at desired position.

param
raster specified WritableRaster to draw at
param
color color of the text
param
str text to draw
param
font font peer to use for drawing text
param
x start X position to draw
param
y start Y position to draw
param
cMinX minimum x of the raster area to draw
param
cMinY minimum y of the raster area to draw
param
cMaxX maximum x of the raster area to draw
param
cMaxY maximum y of the raster area to draw

        // TODO: implement complex clipping

        int xSrcSurf, ySrcSurf; // Start point in String rectangle
        int xDstSurf, yDstSurf; // Start point in Surface rectangle
        int clWidth, clHeight;

        char[] chars = str.toCharArray();

        int xBaseLine = x;
        int yBaseLine = y;

        for (char element : chars) {
            Glyph gl = font.getGlyph(element);
            GlyphMetrics pointMetrics = gl.getGlyphPointMetrics();
            if (gl.getWidth() == 0) {
                xBaseLine += pointMetrics.getAdvanceX();
                continue;
            }

            byte[] data = gl.getBitmap();
            if (data == null) {
                xBaseLine += pointMetrics.getAdvanceX();
            } else {

                xSrcSurf = 0;
                ySrcSurf = 0;

                xDstSurf = Math.round(xBaseLine + gl.getGlyphPointMetrics().getLSB());
                yDstSurf = yBaseLine - gl.bmp_top;

                int textWidth = gl.bmp_width;
                int textHeight = gl.getPointHeight();

                // if Regions don't intersect
                if ((xDstSurf > cMaxX) || (yDstSurf > cMaxY) || (xDstSurf + textWidth < cMinX)
                        || (yDstSurf + textHeight < cMinY)) {
                    // Nothing to do
                } else {
                    if (xDstSurf >= cMinX) {
                        clWidth = Math.min(textWidth, cMaxX - xDstSurf);
                    } else {
                        xSrcSurf += cMinX - xDstSurf;
                        clWidth = Math.min(cMaxX - cMinX, textWidth - (cMinX - xDstSurf));
                        xDstSurf = cMinX;
                    }
                    if (yDstSurf >= cMinY) {
                        clHeight = Math.min(textHeight, cMaxY - yDstSurf);
                    } else {
                        ySrcSurf += cMinY - yDstSurf;
                        clHeight = Math.min(cMaxY - cMinY, textHeight - (cMinY - yDstSurf));
                        yDstSurf = cMinY;
                    }

                    // Drawing on the Raster
                    for (int h=0; h<clHeight; h++){
                        for (int w=0; w < clWidth ; w++) {
                            byte currByte = data[(ySrcSurf + h)*gl.bmp_pitch + (xSrcSurf+w)/8];
                            boolean emptyByte = ((currByte & (1 << (7 - ((xSrcSurf+w) % 8)))) != 0);
                            if (emptyByte) {
                                raster.setDataElements(xDstSurf+w, yDstSurf+h, color);
                            } else {
                                // Nothing to do
                            }
                        }
                    }
                }
                xBaseLine += pointMetrics.getAdvanceX();
            }
        }
public voiddrawGlyphVector(java.awt.Graphics2D g, java.awt.font.GlyphVector glyphVector, float x, float y)


    
         
                

        AffineTransform at = g.getTransform();
        Rectangle c = g.getClipBounds();
        if (at != null){
            int atType = at.getType();
            if (atType == AffineTransform.TYPE_TRANSLATION) {
                c.translate((int)Math.round(at.getTranslateX()), (int)Math.round(at.getTranslateY()));
            }
        }

        WritableRaster wr = ((BufferedImageGraphics2D)g).getWritableRaster();
        ColorModel cm = ((BufferedImageGraphics2D)g).getColorModel();

        Rectangle rBounds = wr.getBounds();

        Object color = cm.getDataElements(g.getColor().getRGB(), null);

        drawClipGlyphVector(wr, color, glyphVector, (int)Math.round(x + at.getTranslateX()), (int)Math.round(y + at.getTranslateY()),
        Math.max(c.x,rBounds.x),
        Math.max(c.y,rBounds.y),
        Math.min((int)Math.round(c.getMaxX()), (int)Math.round(rBounds.getMaxX())),
        Math.min((int)Math.round(c.getMaxY()), (int)Math.round(rBounds.getMaxY())));
public voiddrawString(java.awt.Graphics2D g, java.lang.String str, float x, float y)

        AffineTransform at = g.getTransform();
        Rectangle c = g.getClipBounds();
        if (at != null){
            int atType = at.getType();
            if (atType == AffineTransform.TYPE_TRANSLATION) {
                c.translate((int)Math.round(at.getTranslateX()), (int)Math.round(at.getTranslateY()));
            }
        }
        WritableRaster wr = ((BufferedImageGraphics2D)g).getWritableRaster();
        ColorModel cm = ((BufferedImageGraphics2D)g).getColorModel();
        Rectangle rBounds = wr.getBounds();

        Object color = cm.getDataElements(g.getColor().getRGB(), null);

        drawClipString(wr, color, str, (FontPeerImpl) (g.getFont().getPeer()),
                (int)Math.round(x + at.getTranslateX()), (int)Math.round(y + at.getTranslateY()),
                Math.max(c.x,rBounds.x),
                Math.max(c.y,rBounds.y),
                Math.min((int)Math.round(c.getMaxX()), (int)Math.round(rBounds.getMaxX())),
                Math.min((int)Math.round(c.getMaxY()), (int)Math.round(rBounds.getMaxY())));