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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\FontParser; |
| 6 | |
| 7 | /** |
| 8 | * Parsed MathVariants sub-table from an OpenType MATH table. |
| 9 | * |
| 10 | * Spec: https://learn.microsoft.com/en-us/typography/opentype/spec/math#mathvariants-table |
| 11 | * |
| 12 | * Holds the data the painter uses to render stretchy delimiters |
| 13 | * (parentheses, brackets, integral signs, radical signs, arrows) at |
| 14 | * arbitrary heights / widths: |
| 15 | * |
| 16 | * - A list of pre-drawn glyph variants at fixed sizes, sorted from |
| 17 | * smallest to largest. The painter picks the smallest variant |
| 18 | * whose advance exceeds the target. |
| 19 | * |
| 20 | * - An optional glyph "assembly" that describes how to build a |
| 21 | * delimiter at any size by stacking three or four glyph parts |
| 22 | * (top + middle(s) + bottom for vertical; left + middle(s) + |
| 23 | * right for horizontal). |
| 24 | * |
| 25 | * Vertical stretchy glyphs (parens, brackets) and horizontal |
| 26 | * stretchy glyphs (arrows, over/underbraces) are tracked in separate |
| 27 | * maps keyed by the base glyph ID. |
| 28 | */ |
| 29 | final readonly class MathVariants |
| 30 | { |
| 31 | /** |
| 32 | * @param int $minConnectorOverlap Minimum overlap (in design |
| 33 | * units) required between adjacent parts in a glyph |
| 34 | * assembly. |
| 35 | * @param array<int, MathGlyphConstruction> $verticalConstructions |
| 36 | * Base-glyph-ID → vertical construction. Used for tall |
| 37 | * delimiters / radicals. |
| 38 | * @param array<int, MathGlyphConstruction> $horizontalConstructions |
| 39 | * Base-glyph-ID → horizontal construction. Used for wide |
| 40 | * arrows / over/under-braces. |
| 41 | */ |
| 42 | public function __construct( |
| 43 | public int $minConnectorOverlap, |
| 44 | public array $verticalConstructions, |
| 45 | public array $horizontalConstructions, |
| 46 | ) {} |
| 47 | } |