37 lines
859 B
JavaScript
37 lines
859 B
JavaScript
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export function measureText(font, text) {
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let x = 0;
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for (let i = 0; i < text.length; i++) {
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if (font.chars[text[i]]) {
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const kerning =
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font.kernings[text[i]] && font.kernings[text[i]][text[i + 1]]
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? font.kernings[text[i]][text[i + 1]]
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: 0;
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x += (font.chars[text[i]].xadvance || 0) + kerning;
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}
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}
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return x;
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}
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export function measureTextHeight(font, text, maxWidth) {
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const words = text.split(' ');
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let line = '';
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let textTotalHeight = font.common.lineHeight;
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for (let n = 0; n < words.length; n++) {
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const testLine = line + words[n] + ' ';
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const testWidth = measureText(font, testLine);
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if (testWidth > maxWidth && n > 0) {
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textTotalHeight += font.common.lineHeight;
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line = words[n] + ' ';
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} else {
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line = testLine;
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}
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}
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return textTotalHeight;
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}
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