chromium/third_party/skia/src/core/SkTextBlobPriv.h

/*
 * Copyright 2018 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkTextBlobPriv_DEFINED
#define SkTextBlobPriv_DEFINED

#include "include/core/SkColorFilter.h"
#include "include/core/SkFont.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkMaskFilter.h"
#include "include/core/SkPathEffect.h"
#include "include/core/SkShader.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTypeface.h"
#include "src/base/SkSafeMath.h"
#include "src/core/SkPaintPriv.h"

class SkReadBuffer;
class SkWriteBuffer;

class SkTextBlobPriv { … };

//
// Textblob data is laid out into externally-managed storage as follows:
//
//    -----------------------------------------------------------------------------
//   | SkTextBlob | RunRecord | Glyphs[] | Pos[] | RunRecord | Glyphs[] | Pos[] | ...
//    -----------------------------------------------------------------------------
//
//  Each run record describes a text blob run, and can be used to determine the (implicit)
//  location of the following record.
//
// Extended Textblob runs have more data after the Pos[] array:
//
//    -------------------------------------------------------------------------
//    ... | RunRecord | Glyphs[] | Pos[] | TextSize | Clusters[] | Text[] | ...
//    -------------------------------------------------------------------------
//
// To determine the length of the extended run data, the TextSize must be read.
//
// Extended Textblob runs may be mixed with non-extended runs.

SkDEBUGCODE(…)

class SkTextBlob::RunRecord { … };

/**
 *  Iterate through all of the text runs of the text blob.  For example:
 *    for (SkTextBlobRunIterator it(blob); !it.done(); it.next()) {
 *         .....
 *    }
 */
class SK_SPI SkTextBlobRunIterator { … };

#endif // SkTextBlobPriv_DEFINED