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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkAtlasTextTarget_DEFINED
#define SkAtlasTextTarget_DEFINED
#include <memory>
#include "SkRefCnt.h"
#include "SkScalar.h"
class SkAtlasTextContext;
class SkAtlasTextFont;
struct SkPoint;
/** Represents a client-created renderable surface and is used to draw text into the surface. */
class SK_API SkAtlasTextTarget {
public:
virtual ~SkAtlasTextTarget();
/**
* Creates a text drawing target. ‘handle’ is used to identify this rendering surface when
* draws are flushed to the SkAtlasTextContext's SkAtlasTextRenderer.
*/
static std::unique_ptr<SkAtlasTextTarget> Make(sk_sp<SkAtlasTextContext>, int width, int height,
void* handle);
/**
* Enqueues a text draw in the target. The caller provides an array of glyphs and their
* positions. The meaning of 'color' here is interpreted by the client's SkAtlasTextRenderer
* when it actually renders the text.
*/
virtual void drawText(const SkGlyphID[], const SkPoint[], int glyphCnt, uint32_t color,
const SkAtlasTextFont&) = 0;
/** Issues all queued text draws to SkAtlasTextRenderer. */
virtual void flush() = 0;
int width() const { return fWidth; }
int height() const { return fHeight; }
void* handle() const { return fHandle; }
SkAtlasTextContext* context() const { return fContext.get(); }
protected:
SkAtlasTextTarget(sk_sp<SkAtlasTextContext>, int width, int height, void* handle);
void* const fHandle;
const sk_sp<SkAtlasTextContext> fContext;
const int fWidth;
const int fHeight;
private:
SkAtlasTextTarget() = delete;
SkAtlasTextTarget(const SkAtlasTextContext&) = delete;
SkAtlasTextTarget& operator=(const SkAtlasTextContext&) = delete;
};
#endif
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