[DEV] add capabilities on font

src/org/atriasoft/esvg/EsvgFont.java

@@ -256,6 +256,35 @@ public class EsvgFont {
 		return (float) realSize / (float) this.unitsPerEm;
 	}
 	
+	public Vector2i calculateTextSize(final int fontSize, final String data) {
+		boolean withKerning = true;
+		int widthOut = calculateWidth(data, fontSize, withKerning);
+		
+		int realSize = calculateFontRealHeight(fontSize);
+		float scale = (float) realSize / (float) this.unitsPerEm;
+		
+		Weight weight = new Weight(new Vector2i(widthOut, realSize));
+		
+		int offsetWriting = 0;
+		int lastValue = 0;
+		for (char uVal : data.toCharArray()) {
+			Glyph glyph = getGlyph(uVal);
+			if (glyph == null) {
+				lastValue = uVal;
+				continue;
+			}
+			if (withKerning) {
+				offsetWriting -= glyph.getKerning(lastValue) * scale;
+				lastValue = uVal;
+			}
+			
+			float advenceXLocal = glyph.getHorizAdvX() * scale;
+			// No generation of output ...
+			offsetWriting += advenceXLocal;
+		}
+		return new Vector2i(offsetWriting, realSize);
+	}
+	
 	public int calculateWidth(final int uVal, final int fontSize) {
 		Glyph glyph = getGlyph(uVal);
 		if (glyph == null) {

src/org/atriasoft/esvg/GraphicContext.java

@@ -1,9 +1,11 @@
 package org.atriasoft.esvg;
 
-import org.atriasoft.egami.ImageByteRGBA;
+import org.atriasoft.egami.ImageByte;
+import org.atriasoft.egami.ToolImage;
 import org.atriasoft.esvg.internal.Log;
 import org.atriasoft.esvg.render.PathModel;
 import org.atriasoft.etk.Color;
+import org.atriasoft.etk.Configs;
 import org.atriasoft.etk.math.Vector2f;
 import org.atriasoft.etk.math.Vector2i;
 
@@ -13,7 +15,7 @@ import org.atriasoft.etk.math.Vector2i;
  *
  */
 public class GraphicContext {
-	private EsvgDocument document;
+	private EsvgDocument document = new EsvgDocument();
 	PaintState paintState;
 	private PathModel path = null;
 	private Vector2i size = Vector2i.VALUE_32;
@@ -22,6 +24,10 @@ public class GraphicContext {
 		clear();
 	}
 	
+	public Vector2i calculateTextSize(final String data) {
+		return FontCache.getFont(Configs.getConfigFonts().getName(), false, false).calculateTextSize(Configs.getConfigFonts().getSize(), data);
+	}
+	
 	public void circle(final Vector2f position, final float radius) {
 		this.document.addElement(new Circle(position, radius, this.paintState.clone()));
 	}
@@ -85,6 +91,14 @@ public class GraphicContext {
 		return this.paintState.getStrokeWidth();
 	}
 	
+	public int getTextHeight() {
+		return getTextHeight(Configs.getConfigFonts().getSize());
+	}
+	
+	public int getTextHeight(final float height) {
+		return FontCache.getFont(Configs.getConfigFonts().getName(), false, false).calculateFontRealHeight((int) height);
+	}
+	
 	public void line(final Vector2f origin, final Vector2f destination) {
 		this.document.addElement(new Line(origin, destination, this.paintState.clone()));
 	}
@@ -181,12 +195,8 @@ public class GraphicContext {
 		this.document.addElement(new Rectangle(position, width, this.paintState.clone()));
 	}
 	
-	public ImageByteRGBA render() {
+	public ImageByte render() {
-		return null;
+		return ToolImage.convertImageByte(this.document.renderImageFloatRGBA(null));
-	}
-	
-	public String renderSvg() {
-		return null;
 	}
 	
 	/**
@@ -249,7 +259,10 @@ public class GraphicContext {
 	
 	public void text(final Vector2f position, final float height, final String data) {
 		this.document.addElement(new Text(position, height, data, this.paintState.clone()));
+	}
 	
+	public void text(final Vector2f position, final String data) {
+		this.document.addElement(new Text(position, Configs.getConfigFonts().getSize(), data, this.paintState.clone()));
 	}
 	
 }

src/org/atriasoft/esvg/Text.java

@@ -131,6 +131,9 @@ public class Text extends Base {
 					DynamicColor colorStroke = null;
 					if (this.paint.strokeWidth > 0.0f) {
 						colorStroke = DynamicColor.createColor(this.paint.stroke, mtx);
+						if (colorStroke == null) {
+							Log.warning("Color stroke is null: ...");
+						} else {
 							// check if we need to display stroke:
 							SegmentList listSegmentStroke = new SegmentList();
 							listSegmentStroke.createSegmentListStroke(listPoints, this.paint.strokeWidth, this.paint.lineCap, this.paint.lineJoin, this.paint.miterLimit);
@@ -139,6 +142,7 @@ public class Text extends Base {
 							// now, traverse the scanlines and find the intersections on each scanline, use non-zero rule
 							tmpStroke.generate(myRenderer.getSize(), myRenderer.getNumberSubScanLine(), listSegmentStroke);
 						}
+					}
 					// add on images:
 					myRenderer.print(tmpFill, colorFill, tmpStroke, colorStroke, this.paint.opacity);
 				}

test/Unnamed document 2.svg

@@ -0,0 +1,127 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="300"
+   height="300"
+   viewBox="0 0 79.374998 79.375002"
+   version="1.1"
+   id="svg8"
+   inkscape:version="1.0.2 (e86c870879, 2021-01-15, custom)"
+   sodipodi:docname="Unnamed document 2.svg">
+  <defs
+     id="defs2" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.98994949"
+     inkscape:cx="443.11885"
+     inkscape:cy="483.15179"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     inkscape:document-rotation="0"
+     showgrid="false"
+     units="px"
+     inkscape:window-width="3838"
+     inkscape:window-height="2118"
+     inkscape:window-x="0"
+     inkscape:window-y="20"
+     inkscape:window-maximized="1" />
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:6.35px;line-height:1.25;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583"
+       x="52.662182"
+       y="11.725324"
+       id="text835"><tspan
+         sodipodi:role="line"
+         id="tspan833"
+         x="52.662182"
+         y="11.725324"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:6.35px;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.264583">H<tspan
+   style="fill:#d38b00;fill-opacity:1"
+   id="tspan1023">e</tspan>llo</tspan><tspan
+         sodipodi:role="line"
+         x="52.662182"
+         y="19.662823"
+         style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:6.35px;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.264583"
+         id="tspan847">sq<tspan
+   style="fill:#8c0000;fill-opacity:1"
+   id="tspan1029">m</tspan>l</tspan><tspan
+         sodipodi:role="line"
+         x="52.662182"
+         y="27.600323"
+         style="font-style:italic;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:6.35px;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.264583"
+         id="tspan849">k<tspan
+   style="fill:#000063;fill-opacity:1"
+   id="tspan1031">s</tspan>d</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-weight:normal;font-size:5.64444444px;line-height:1.25;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583;-inkscape-font-specification:'sans-serif, Normal';font-stretch:normal;font-variant:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;"
+       x="1.3595439"
+       y="44.163139"
+       id="text853"><tspan
+         sodipodi:role="line"
+         id="tspan851"
+         x="1.3595439"
+         y="44.163139"
+         style="stroke-width:0.264583;-inkscape-font-specification:'sans-serif, Normal';font-family:sans-serif;font-weight:normal;font-style:normal;font-stretch:normal;font-variant:normal;font-size:5.64444444px;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;">Hello</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-weight:normal;font-size:5.64444444px;line-height:1.25;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583;-inkscape-font-specification:'sans-serif, Normal';font-stretch:normal;font-variant:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;"
+       x="1.1807559"
+       y="55.513321"
+       id="text857"><tspan
+         sodipodi:role="line"
+         id="tspan855"
+         x="1.1807559"
+         y="55.513321"
+         style="stroke-width:0.264583;font-weight:bold;-inkscape-font-specification:'sans-serif, Normal';font-family:sans-serif;font-style:normal;font-stretch:normal;font-variant:normal;font-size:5.64444444px;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal">Hello Bold</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-weight:normal;font-size:5.64444444px;line-height:1.25;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583;-inkscape-font-specification:'sans-serif, Normal';font-stretch:normal;font-variant:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;"
+       x="1.196579"
+       y="65.77121"
+       id="text861"><tspan
+         sodipodi:role="line"
+         id="tspan859"
+         x="1.196579"
+         y="65.77121"
+         style="stroke-width:0.264583;font-style:italic;-inkscape-font-specification:'sans-serif, Normal';font-family:sans-serif;font-weight:normal;font-stretch:normal;font-variant:normal;font-size:5.64444444px;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal">Hello Italic</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-weight:normal;font-size:5.64444444px;line-height:1.25;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583;-inkscape-font-specification:'sans-serif, Normal';font-stretch:normal;font-variant:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;"
+       x="1.9766912"
+       y="76.594482"
+       id="text865"><tspan
+         sodipodi:role="line"
+         id="tspan863"
+         x="1.9766912"
+         y="76.594482"
+         style="stroke-width:0.264583;font-weight:bold;font-style:italic;-inkscape-font-specification:'sans-serif, Normal';font-family:sans-serif;font-stretch:normal;font-variant:normal;font-size:5.64444444px;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal">Hello Bold Italic</tspan></text>
+  </g>
+</svg>