73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
/*
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* Copyright 2021 Google LLC
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef sktext_gpu_Slug_DEFINED
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#define sktext_gpu_Slug_DEFINED
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/private/base/SkAPI.h"
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#include <cstddef>
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#include <cstdint>
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class SkCanvas;
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class SkData;
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class SkPaint;
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class SkReadBuffer;
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class SkStrikeClient;
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class SkTextBlob;
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class SkWriteBuffer;
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struct SkDeserialProcs;
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struct SkPoint;
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namespace sktext::gpu {
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// Slug encapsulates an SkTextBlob at a specific origin, using a specific paint. It can be
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// manipulated using matrix and clip changes to the canvas. If the canvas is transformed, then
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// the Slug will also transform with smaller glyphs using bi-linear interpolation to render. You
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// can think of a Slug as making a rubber stamp out of a SkTextBlob.
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class SK_API Slug : public SkRefCnt {
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public:
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// Return nullptr if the blob would not draw. This is not because of clipping, but because of
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// some paint optimization. The Slug is captured as if drawn using drawTextBlob.
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static sk_sp<Slug> ConvertBlob(
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SkCanvas* canvas, const SkTextBlob& blob, SkPoint origin, const SkPaint& paint);
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// Serialize the slug.
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sk_sp<SkData> serialize() const;
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size_t serialize(void* buffer, size_t size) const;
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// Set the client parameter to the appropriate SkStrikeClient when typeface ID translation
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// is needed.
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static sk_sp<Slug> Deserialize(const void* data,
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size_t size,
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const SkStrikeClient* client = nullptr);
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static sk_sp<Slug> MakeFromBuffer(SkReadBuffer& buffer);
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// Allows clients to deserialize SkPictures that contain slug data
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static void AddDeserialProcs(SkDeserialProcs* procs, const SkStrikeClient* client = nullptr);
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// Draw the Slug obeying the canvas's mapping and clipping.
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void draw(SkCanvas* canvas, const SkPaint& paint) const;
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virtual SkRect sourceBounds() const = 0;
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virtual SkRect sourceBoundsWithOrigin () const = 0;
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virtual void doFlatten(SkWriteBuffer&) const = 0;
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uint32_t uniqueID() const { return fUniqueID; }
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private:
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static uint32_t NextUniqueID();
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const uint32_t fUniqueID{NextUniqueID()};
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};
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} // namespace sktext::gpu
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#endif // sktext_gpu_Slug_DEFINED
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