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fix measure text actualBoundingBoxLeft sign #66

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lhapaipai wants to merge 1 commit into from
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fix measure text actualBoundingBoxLeft sign #66

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6 changes: 3 additions & 3 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -69,8 +69,8 @@ export default class TinySDF {
const glyphLeft = Math.floor(actualBoundingBoxLeft);

// If the glyph overflows the canvas size, it will be clipped at the bottom/right
const glyphWidth = Math.max(0, Math.min(this.size - this.buffer, Math.ceil(actualBoundingBoxRight) - glyphLeft));
const glyphHeight = Math.max(0, Math.min(this.size - this.buffer, glyphTop + Math.ceil(actualBoundingBoxDescent)));
const glyphWidth = Math.max(0, Math.min(this.size - this.buffer * 2, Math.ceil(actualBoundingBoxRight) + glyphLeft));
const glyphHeight = Math.max(0, Math.min(this.size - this.buffer * 2, glyphTop + Math.ceil(actualBoundingBoxDescent)));

const width = glyphWidth + 2 * this.buffer;
const height = glyphHeight + 2 * this.buffer;
Expand All @@ -83,7 +83,7 @@ export default class TinySDF {
const {ctx, buffer, gridInner, gridOuter} = this;
if (this.lang) ctx.lang = this.lang;
ctx.clearRect(buffer, buffer, glyphWidth, glyphHeight);
ctx.fillText(char, buffer - glyphLeft, buffer + glyphTop);
ctx.fillText(char, buffer + glyphLeft, buffer + glyphTop);
const imgData = ctx.getImageData(buffer, buffer, glyphWidth, glyphHeight);

// default: outside the glyph (INF distance) for outer, inside (0 distance) for inner
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