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Accent positioning in Type1 seac glyphs

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In `display/canvas.js` the accent offsets must be multiplied by `fontSize` to make the offsets large enough. Another problem is in `core/type1_parser.js` when the Type1 command `seac` is handled. There is an error in the Adobe Type1 spec. See chapter 6 in Type1 Font Format Supplement, which provides an errata: The arguments of `seac` specify the offset of the left side bearing (LSB) points, not the offset of origins. This can be fixed in `core/type1_parser.js` by adding the difference of the LSB values.
This commit is contained in:
Jani Pehkonen 2020-08-23 20:48:10 +03:00
parent 7df8aa34a5
commit e7febbf0f7
2 changed files with 6 additions and 2 deletions
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6
src/display/canvas.js
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@ -1798,8 +1798,10 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
} else {
this.paintChar(character, scaledX, scaledY, patternTransform);
if (accent) {
scaledAccentX = scaledX + accent.offset.x / fontSizeScale;
scaledAccentY = scaledY - accent.offset.y / fontSizeScale;
scaledAccentX =
scaledX + (fontSize * accent.offset.x) / fontSizeScale;
scaledAccentY =
scaledY - (fontSize * accent.offset.y) / fontSizeScale;
this.paintChar(
accent.fontChar,
scaledAccentX,