Alexei Podtelezhnikov pushed to branch master at FreeType / FreeType
Commits:
-
dd78d4a7
by Alexei Podtelezhnikov at 2023-03-16T03:28:59+00:00
2 changed files:
Changes:
| ... | ... | @@ -68,6 +68,18 @@ FT_BEGIN_HEADER |
| 68 | 68 | FT_EXPORT( void )
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| 69 | 69 | FT_GlyphSlot_Embolden( FT_GlyphSlot slot );
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| 70 | 70 | |
| 71 | + /* Precisely adjust the glyph weight either horizontally or vertically. */
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| 72 | + /* The `xdelta` and `ydelta` values are fractions of the face Em size */
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| 73 | + /* (in fixed-point format). Considering that a regular face would have */
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| 74 | + /* stem widths on the order of 0.1 Em, a delta of 0.05 (0x0CCC) should */
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| 75 | + /* be very noticeable. To increase or decrease the weight, use positive */
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| 76 | + /* or negative values, respectively. */
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| 77 | + FT_EXPORT( void )
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| 78 | + FT_GlyphSlot_AdjustWeight( FT_GlyphSlot slot,
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| 79 | + FT_Fixed xdelta,
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| 80 | + FT_Fixed ydelta );
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| 81 | + |
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| 82 | + |
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| 71 | 83 | /* Slant an outline glyph to the right by about 12 degrees. */
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| 72 | 84 | FT_EXPORT( void )
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| 73 | 85 | FT_GlyphSlot_Oblique( FT_GlyphSlot slot );
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| ... | ... | @@ -97,9 +97,18 @@ |
| 97 | 97 | |
| 98 | 98 | FT_EXPORT_DEF( void )
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| 99 | 99 | FT_GlyphSlot_Embolden( FT_GlyphSlot slot )
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| 100 | + {
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| 101 | + FT_GlyphSlot_AdjustWeight( slot, 0x0AAA, 0x0AAA );
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| 102 | + }
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| 103 | + |
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| 104 | + |
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| 105 | + FT_EXPORT_DEF( void )
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| 106 | + FT_GlyphSlot_AdjustWeight( FT_GlyphSlot slot,
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| 107 | + FT_Fixed xdelta,
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| 108 | + FT_Fixed ydelta )
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| 100 | 109 | {
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| 101 | 110 | FT_Library library;
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| 102 | - FT_Face face;
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| 111 | + FT_Size size;
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| 103 | 112 | FT_Error error;
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| 104 | 113 | FT_Pos xstr, ystr;
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| 105 | 114 | |
| ... | ... | @@ -108,16 +117,15 @@ |
| 108 | 117 | return;
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| 109 | 118 | |
| 110 | 119 | library = slot->library;
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| 111 | - face = slot->face;
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| 120 | + size = slot->face->size;
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| 112 | 121 | |
| 113 | 122 | if ( slot->format != FT_GLYPH_FORMAT_OUTLINE &&
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| 114 | 123 | slot->format != FT_GLYPH_FORMAT_BITMAP )
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| 115 | 124 | return;
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| 116 | 125 | |
| 117 | - /* some reasonable strength */
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| 118 | - xstr = FT_MulFix( face->units_per_EM,
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| 119 | - face->size->metrics.y_scale ) / 24;
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| 120 | - ystr = xstr;
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| 126 | + /* express deltas in pixels in 26.6 format */
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| 127 | + xstr = (FT_Pos)size->metrics.x_ppem * xdelta / 1024;
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| 128 | + ystr = (FT_Pos)size->metrics.y_ppem * ydelta / 1024;
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| 121 | 129 | |
| 122 | 130 | if ( slot->format == FT_GLYPH_FORMAT_OUTLINE )
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| 123 | 131 | FT_Outline_EmboldenXY( &slot->outline, xstr, ystr );
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