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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef GFX_FONTMISSINGGLYPHS_H
#define GFX_FONTMISSINGGLYPHS_H
#include "mozilla/Attributes.h"
#include "mozilla/gfx/MatrixFwd.h"
#include "mozilla/gfx/Rect.h"
namespace mozilla {
namespace gfx {
class DrawTarget;
class Pattern;
} // namespace gfx
} // namespace mozilla
/**
* This class should not be instantiated. It's just a container
* for some helper functions.
*/
class gfxFontMissingGlyphs final {
typedef mozilla::gfx::DrawTarget DrawTarget;
typedef mozilla::gfx::Float Float;
typedef mozilla::gfx::Matrix Matrix;
typedef mozilla::gfx::Pattern Pattern;
typedef mozilla::gfx::Rect Rect;
gfxFontMissingGlyphs() = delete; // prevent instantiation
public:
/**
* Draw hexboxes for a missing glyph.
* @param aChar the UTF16 codepoint for the character
* @param aRect the glyph-box for the glyph that is missing
* @param aDrawTarget the DrawTarget to draw to
* @param aPattern the pattern currently being used to paint
* @param aAppUnitsPerDevPixel the appUnits to devPixel ratio we're using,
* (so we can scale glyphs to a sensible size)
* @param aMat optional local-space orientation matrix
*/
static void DrawMissingGlyph(uint32_t aChar, const Rect& aRect,
DrawTarget& aDrawTarget, const Pattern& aPattern,
uint32_t aAppUnitsPerDevPixel,
const Matrix* aMat = nullptr);
/**
* @return the desired minimum width for a glyph-box that will allow
* the hexboxes to be drawn reasonably.
*/
static Float GetDesiredMinWidth(uint32_t aChar, uint32_t aAppUnitsPerDevUnit);
static void Purge();
static void Shutdown();
};
#endif
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