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1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
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2 * This Source Code Form is subject to the terms of the Mozilla Public |
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this |
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
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5 |
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6 #ifndef GFX_FONTMISSINGGLYPHS_H |
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7 #define GFX_FONTMISSINGGLYPHS_H |
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8 |
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9 #include "gfxTypes.h" |
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10 #include "gfxRect.h" |
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11 |
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12 class gfxContext; |
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13 |
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14 /** |
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15 * This class should not be instantiated. It's just a container |
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16 * for some helper functions. |
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17 */ |
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18 class gfxFontMissingGlyphs { |
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19 public: |
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20 /** |
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21 * Draw hexboxes for a missing glyph. |
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22 * @param aContext the context to draw to |
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23 * @param aRect the glyph-box for the glyph that is missing |
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24 * @param aChar the UTF16 codepoint for the character |
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25 * @param aAppUnitsPerDevPixel the appUnits to devPixel ratio we're using, |
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26 * (so we can scale glyphs to a sensible size) |
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27 */ |
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28 static void DrawMissingGlyph(gfxContext *aContext, |
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29 const gfxRect& aRect, |
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30 uint32_t aChar, |
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31 uint32_t aAppUnitsPerDevPixel); |
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32 /** |
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33 * @return the desired minimum width for a glyph-box that will allow |
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34 * the hexboxes to be drawn reasonably. |
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35 */ |
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36 static gfxFloat GetDesiredMinWidth(uint32_t aChar, |
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37 uint32_t aAppUnitsPerDevUnit); |
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38 }; |
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39 |
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40 #endif |