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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /gfx/thebes/gfxGraphiteShaper.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/thebes/gfxGraphiteShaper.h')
-rw-r--r--gfx/thebes/gfxGraphiteShaper.h75
1 files changed, 75 insertions, 0 deletions
diff --git a/gfx/thebes/gfxGraphiteShaper.h b/gfx/thebes/gfxGraphiteShaper.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_GRAPHITESHAPER_H
+#define GFX_GRAPHITESHAPER_H
+
+#include "gfxFont.h"
+
+#include "mozilla/gfx/2D.h"
+#include "nsTHashSet.h"
+
+#include "ThebesRLBoxTypes.h"
+
+struct gr_face;
+struct gr_font;
+struct gr_segment;
+
+class gfxGraphiteShaper : public gfxFontShaper {
+ public:
+ explicit gfxGraphiteShaper(gfxFont* aFont);
+ virtual ~gfxGraphiteShaper();
+
+ bool ShapeText(DrawTarget* aDrawTarget, const char16_t* aText,
+ uint32_t aOffset, uint32_t aLength, Script aScript,
+ nsAtom* aLanguage, bool aVertical, RoundingFlags aRounding,
+ gfxShapedText* aShapedText) override;
+
+ static void Shutdown();
+
+ protected:
+ nsresult SetGlyphsFromSegment(gfxShapedText* aShapedText, uint32_t aOffset,
+ uint32_t aLength, const char16_t* aText,
+ tainted_opaque_gr<char16_t*> t_aText,
+ tainted_opaque_gr<gr_segment*> aSegment,
+ RoundingFlags aRounding);
+
+ // Graphite is run in a rlbox sandbox. Callback GrGetAdvance must be
+ // explicitly permitted. Since the sandbox is owned in gfxFontEntry class,
+ // gfxFontEntry needs access to the protected callback.
+ friend class gfxFontEntryCallbacks;
+ static tainted_opaque_gr<float> GrGetAdvance(
+ rlbox_sandbox_gr& sandbox, tainted_opaque_gr<const void*> appFontHandle,
+ tainted_opaque_gr<uint16_t> glyphid);
+
+ tainted_opaque_gr<gr_face*>
+ mGrFace; // owned by the font entry; shaper must call
+ // gfxFontEntry::ReleaseGrFace when finished with it
+ tainted_opaque_gr<gr_font*> mGrFont; // owned by the shaper itself
+
+ // All libGraphite functionality is sandboxed. This is the sandbox instance.
+ rlbox_sandbox_gr* mSandbox;
+
+ // Holds the handle to the permitted callback into Firefox for the sandboxed
+ // libGraphite
+ sandbox_callback_gr<float (*)(const void*, uint16_t)>* mCallback;
+
+ struct CallbackData {
+ // mFont is a pointer to the font that owns this shaper, so it will
+ // remain valid throughout our lifetime
+ gfxFont* MOZ_NON_OWNING_REF mFont;
+ };
+
+ CallbackData mCallbackData;
+ static thread_local CallbackData* tl_GrGetAdvanceData;
+
+ bool mFallbackToSmallCaps; // special fallback for the petite-caps case
+
+ // Convert HTML 'lang' (BCP47) to Graphite language code
+ static uint32_t GetGraphiteTagForLang(const nsCString& aLang);
+ static nsTHashSet<uint32_t>* sLanguageTags;
+};
+
+#endif /* GFX_GRAPHITESHAPER_H */