gfx/skia/skia/src/fonts/SkRandomScalerContext.h
author Wes Kocher <wkocher@mozilla.com>
Wed, 10 May 2017 10:01:18 -0700
changeset 407965 ce2218406119c36a551e3faea4e192186ee46cc5
parent 407937 af6f19870b2a00759ac1d83dedc3db57213abfee
child 408167 0ded74baeaf23d7985401fe9bbabdb3d9385ac22
permissions -rw-r--r--
Backed out 9 changesets (bug 1340627) for graphical glitches a=backout Backed out changeset 0b1371055c7f (bug 1340627) Backed out changeset f152be1fadb7 (bug 1340627) Backed out changeset c691e2ab6a0c (bug 1340627) Backed out changeset 3cb4bceb8d79 (bug 1340627) Backed out changeset 026aadd76d06 (bug 1340627) Backed out changeset fdbd5d281287 (bug 1340627) Backed out changeset 75fb0d9858a9 (bug 1340627) Backed out changeset 0d4ec7d38a00 (bug 1340627) Backed out changeset af6f19870b2a (bug 1340627) MozReview-Commit-ID: 9dHr7xMZezY

/*
 * Copyright 2015 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkRandomScalerContext_DEFINED
#define SkRandomScalerContext_DEFINED

#include "SkScalerContext.h"
#include "SkTypeface.h"

/*
 * This scaler context is for debug only purposes.  It will 'randomly' but deterministically return
 * LCD / A8 / BW / RBGA masks based off of the Glyph ID
 */

class SkRandomTypeface : public SkTypeface {
public:
    SkRandomTypeface(sk_sp<SkTypeface> proxy, const SkPaint&, bool fakeit);

    SkTypeface* proxy() const { return fProxy.get(); }
    const SkPaint& paint() const { return fPaint; }

protected:
    SkScalerContext* onCreateScalerContext(const SkScalerContextEffects&,
                                           const SkDescriptor*) const override;
    void onFilterRec(SkScalerContextRec*) const override;
    SkAdvancedTypefaceMetrics* onGetAdvancedTypefaceMetrics(
        PerGlyphInfo,
        const uint32_t* glyphIDs,
        uint32_t glyphIDsCount) const override;
    SkStreamAsset* onOpenStream(int* ttcIndex) const override;
    void onGetFontDescriptor(SkFontDescriptor*, bool* isLocal) const override;

    int onCharsToGlyphs(const void* chars, Encoding encoding,
                        uint16_t glyphs[], int glyphCount) const override;
    int onCountGlyphs() const override;
    int onGetUPEM() const override;

    void onGetFamilyName(SkString* familyName) const override;
    SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override;

    int onGetTableTags(SkFontTableTag tags[]) const override;
    size_t onGetTableData(SkFontTableTag, size_t offset,
                          size_t length, void* data) const override;

private:
    sk_sp<SkTypeface>   fProxy;
    SkPaint             fPaint;
    bool                fFakeIt;
};

#endif