Set bold and italic flag translated font

Author: edoardocavazza

src/core/evaluator.js

@@ -4599,6 +4599,10 @@ class PartialEvaluator {
     if (typeof italicAngle !== "number") {
       italicAngle = 0;
     }
+    let fontWeight = descriptor.get("FontWeight");
+    if (typeof fontWeight !== "number") {
+      fontWeight = 400;
+    }
 
     const properties = {
       type,
@@ -4623,6 +4627,7 @@ class PartialEvaluator {
       capHeight,
       flags,
       italicAngle,
+      fontWeight,
       isType3Font,
       cssFontInfo,
       scaleFactors: glyphScaleFactors,

src/core/fonts.js

@@ -1042,6 +1042,16 @@ class Font {
     this.fontMatrix = properties.fontMatrix;
     this.bbox = properties.bbox;
     this.defaultEncoding = properties.defaultEncoding;
+    if (typeof properties.fontWeight === "number") {
+      if (properties.fontWeight === 900) {
+        this.black = true;
+      } else if (properties.fontWeight >= 700) {
+        this.bold = true;
+      }
+    }
+    if (typeof properties.italicAngle === "number" && properties.italicAngle) {
+      this.italic = true;
+    }
 
     this.toUnicode = properties.toUnicode;
     this.toFontChar = [];