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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.
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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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src/core/type1_parser.js
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@ -232,7 +232,9 @@ var Type1CharString = (function Type1CharStringClosure() {
// seac is like type 2's special endchar but it doesn't use the
// first argument asb, so remove it.
if (seacAnalysisEnabled) {
const asb = this.stack[this.stack.length - 5];
this.seac = this.stack.splice(-4, 4);
this.seac[0] += this.lsb - asb;
error = this.executeCommand(0, COMMAND_MAP.endchar);
} else {
error = this.executeCommand(4, COMMAND_MAP.endchar);