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-rw-r--r--gfx/thebes/gfxFontMissingGlyphs.h56
1 files changed, 56 insertions, 0 deletions
diff --git a/gfx/thebes/gfxFontMissingGlyphs.h b/gfx/thebes/gfxFontMissingGlyphs.h
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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 aMat optional local-space orientation matrix
+ */
+ static void DrawMissingGlyph(uint32_t aChar, const Rect& aRect,
+ DrawTarget& aDrawTarget, const Pattern& aPattern,
+ 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