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Commit 34b4af27 authored by stepan's avatar stepan
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SVG: remove usage of non-scaling-stroke not supported in all application

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com.oracle.truffle.r.library/src/com/oracle/truffle/r/library/fastrGrid/device/SVGDevice.java
+ 31
− 21
View file @ 34b4af27
......@@ -41,6 +41,8 @@ import com.oracle.truffle.r.runtime.Utils;
public class SVGDevice implements GridDevice, FileGridDevice {
private static final DecimalFormat DECIMAL_FORMAT = new DecimalFormat("0.000");
private static final double COORD_FACTOR = INCH_TO_POINTS_FACTOR;
private final StringBuilder data = new StringBuilder(1024);
private String filename;
private final double width;
......@@ -65,12 +67,11 @@ public class SVGDevice implements GridDevice, FileGridDevice {
// saving it anywhere.
data.setLength(0);
cachedCtx = null;
append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
append("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">");
// we could use real inches, but that makes the output different to GnuR and other formats
// (jpg, ...), which use conversion 70px ~ 1in
append("<svg xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' version='1.1' width='%.3fpx' height='%.3fpx' viewBox='0 0 %.3f %.3f'>", width * 70d, height * 70d,
width,
height);
append("<svg xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' version='1.1' viewBox='0 0 %.3f %.3f'>",
width * COORD_FACTOR,
height * COORD_FACTOR);
}
@Override
......@@ -88,9 +89,9 @@ public class SVGDevice implements GridDevice, FileGridDevice {
@Override
public void drawRect(DrawingContext ctx, double leftX, double bottomY, double newWidth, double newHeight, double rotationAnticlockWise) {
appendStyle(ctx);
append("<rect vector-effect='non-scaling-stroke' x='%.3f' y='%.3f' width='%.3f' height='%.3f'", leftX, transY(bottomY + newHeight), newWidth, newHeight);
append("<rect x='%.3f' y='%.3f' width='%.3f' height='%.3f'", leftX * COORD_FACTOR, transY(bottomY + newHeight) * COORD_FACTOR, newWidth * COORD_FACTOR, newHeight * COORD_FACTOR);
if (rotationAnticlockWise != 0) {
append("transform='rotate(%.3f %.3f,%.3f)'", toDegrees(rotationAnticlockWise), (leftX + newWidth / 2.), transY(bottomY + newHeight / 2.));
append("transform='rotate(%.3f %.3f,%.3f)'", toDegrees(rotationAnticlockWise), (leftX + newWidth / 2.) * COORD_FACTOR, transY(bottomY + newHeight / 2.) * COORD_FACTOR);
}
data.append("/>"); // end of 'rect' tag
}
......@@ -108,24 +109,25 @@ public class SVGDevice implements GridDevice, FileGridDevice {
@Override
public void drawCircle(DrawingContext ctx, double centerX, double centerY, double radius) {
appendStyle(ctx);
append("<circle vector-effect='non-scaling-stroke' cx='%.3f' cy='%.3f' r='%.3f'/>", centerX, transY(centerY), radius);
append("<circle cx='%.3f' cy='%.3f' r='%.3f'/>", centerX * COORD_FACTOR, transY(centerY) * COORD_FACTOR, radius * COORD_FACTOR);
}
@Override
public void drawRaster(double leftX, double bottomY, double width, double height, int[] pixels, int pixelsColumnsCount, ImageInterpolation interpolation) {
byte[] bitmap = Bitmap.create(pixels, pixelsColumnsCount);
String base64 = Base64.getEncoder().encodeToString(bitmap);
append("<image x='%.3f' y='%.3f' width='%.3f' height='%.3f' preserveAspectRatio='none' xlink:href='data:image/bmp;base64,%s'/>", leftX, transY(bottomY + height), width, height, base64);
append("<image x='%.3f' y='%.3f' width='%.3f' height='%.3f' preserveAspectRatio='none' xlink:href='data:image/bmp;base64,%s'/>", leftX * COORD_FACTOR, transY(bottomY + height) * COORD_FACTOR,
width * COORD_FACTOR, height * COORD_FACTOR, base64);
}
@Override
public void drawString(DrawingContext ctx, double leftX, double bottomY, double rotationAnticlockWise, String text) {
appendStyle(ctx);
append("<text x='%.3f' y='%.3f' textLength='%.3f' lengthAdjust='spacingAndGlyphs' ", leftX, transY(bottomY), getStringWidth(ctx, text));
closeStyle();
append("<text x='%.3f' y='%.3f' textLength='%.3fpx' lengthAdjust='spacingAndGlyphs' ", leftX * COORD_FACTOR, transY(bottomY) * COORD_FACTOR, getStringWidth(ctx, text) * COORD_FACTOR);
// SVG interprets the "fill" as the color of the text
data.append("style='").append(getStyleColor("fill", ctx.getColor())).append(";stroke:transparent'");
data.append("style='").append(getStyleColor("fill", ctx.getColor())).append('\'');
if (rotationAnticlockWise != 0) {
append(" transform='rotate(%.3f %.3f,%.3f)'", toDegrees(rotationAnticlockWise), leftX, transY(bottomY));
append(" transform='rotate(%.3f %.3f,%.3f)'", toDegrees(rotationAnticlockWise), leftX * COORD_FACTOR, transY(bottomY) * COORD_FACTOR);
}
data.append(">").append(text).append("</text>");
}
......@@ -147,9 +149,9 @@ public class SVGDevice implements GridDevice, FileGridDevice {
// supports this by means of "textLength" attribute, which allows us to force text to have
// specified width. So we approximate the width of given text in the calculation below and
// then force the text to actually have such width if it ever gets displayed by #drawString.
double factor = 0.5; // empirically chosen
double factor = 0.6; // empirically chosen
if (ctx.getFontStyle() == GridFontStyle.BOLD || ctx.getFontStyle() == GridFontStyle.BOLDITALIC) {
factor = 0.62;
factor = 0.675;
}
double letterWidth = (ctx.getFontSize() / INCH_TO_POINTS_FACTOR);
double result = text.length() * factor * letterWidth;
......@@ -157,7 +159,7 @@ public class SVGDevice implements GridDevice, FileGridDevice {
char c = text.charAt(i);
if (c == 'w' || c == 'm') {
result += letterWidth * 0.2;
} else if (c == 'z') {
} else if (c == 'z' || c == 'v') {
result += letterWidth * 0.1;
}
}
......@@ -168,16 +170,16 @@ public class SVGDevice implements GridDevice, FileGridDevice {
public double getStringHeight(DrawingContext ctx, String text) {
// we need height without ascent/descent of letters that are not in the string, this is
// empirically tested calculation
return 0.8 * (ctx.getFontSize() / INCH_TO_POINTS_FACTOR);
return 0.7 * (ctx.getFontSize() / INCH_TO_POINTS_FACTOR);
}
private void drawPoly(DrawingContext ctx, double[] x, double[] y, int startIndex, int length, String attributes) {
appendStyle(ctx);
data.append("<polyline vector-effect='non-scaling-stroke' points='");
data.append("<polyline points='");
for (int i = 0; i < length; i++) {
data.append(DECIMAL_FORMAT.format(x[i + startIndex]));
data.append(DECIMAL_FORMAT.format(x[i + startIndex] * COORD_FACTOR));
data.append(',');
data.append(DECIMAL_FORMAT.format(transY(y[i + startIndex])));
data.append(DECIMAL_FORMAT.format(transY(y[i + startIndex]) * COORD_FACTOR));
data.append(' ');
}
data.append("' ").append(attributes).append(" />");
......@@ -203,6 +205,14 @@ public class SVGDevice implements GridDevice, FileGridDevice {
append("</svg>");
}
// closes opened <g> tag if necessary
private void closeStyle() {
if (cachedCtx != null) {
cachedCtx = null;
append("</g>");
}
}
private void appendStyle(DrawingContext ctx) {
if (cachedCtx == null || !DrawingContext.areSame(cachedCtx, ctx)) {
if (cachedCtx != null) {
......@@ -238,7 +248,7 @@ public class SVGDevice implements GridDevice, FileGridDevice {
if (ctx.getLineJoin() == GridLineJoin.MITRE) {
data.append(";stroke-miterlimit:").append(ctx.getLineMitre());
}
data.append(";font-size:").append(ctx.getFontSize() / INCH_TO_POINTS_FACTOR).append("px");
data.append(";font-size:").append(ctx.getFontSize()).append("px");
if (!ctx.getFontFamily().isEmpty()) {
// Font-family strings 'mono', 'sans', and 'serif' are OK for us
data.append(";font-family:").append(ctx.getFontFamily());
......
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