src/gpu/text/GrTextUtils.h

/*
 * 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 GrTextUtils_DEFINED
#define GrTextUtils_DEFINED

#include "GrColor.h"
#include "SkScalar.h"

class GrAtlasTextBlob;
class GrBatchFontCache;
class GrBatchTextStrike;
class GrClip;
class GrContext;
class GrDrawContext;
class GrFontScaler;
class SkGlyph;
class SkMatrix;
struct SkIRect;
class SkPaint;
struct SkPoint;
class SkGlyphCache;
class SkSurfaceProps;

/*
 * A class to house a bunch of common text utilities.  This class should *ONLY* have static
 * functions.  It is not a namespace only because we wish to friend SkPaint
 *
 */
class GrTextUtils {
public:
    // Functions for appending BMP text to GrAtlasTextBlob
    static void DrawBmpText(GrAtlasTextBlob*, int runIndex,
                            GrBatchFontCache*, const SkSurfaceProps&,
                            const SkPaint&,
                            GrColor, const SkMatrix& viewMatrix,
                            const char text[], size_t byteLength,
                            SkScalar x, SkScalar y);

    static void DrawBmpPosText(GrAtlasTextBlob*, int runIndex,
                               GrBatchFontCache*, const SkSurfaceProps&, const SkPaint&,
                               GrColor, const SkMatrix& viewMatrix,
                               const char text[], size_t byteLength,
                               const SkScalar pos[], int scalarsPerPosition,
                               const SkPoint& offset);

    // Functions for drawing text as paths
    static void DrawTextAsPath(GrContext*, GrDrawContext*, const GrClip& clip,
                               const SkPaint& origPaint, const SkMatrix& viewMatrix,
                               const char text[], size_t byteLength, SkScalar x, SkScalar y,
                               const SkIRect& clipBounds);

    static void DrawPosTextAsPath(GrContext* context,
                                  GrDrawContext* dc,
                                  const SkSurfaceProps& props,
                                  const GrClip& clip,
                                  const SkPaint& origPaint, const SkMatrix& viewMatrix,
                                  const char text[], size_t byteLength,
                                  const SkScalar pos[], int scalarsPerPosition,
                                  const SkPoint& offset, const SkIRect& clipBounds);
private:
    static void BmpAppendGlyph(GrAtlasTextBlob*, int runIndex, GrBatchFontCache*,
                               GrBatchTextStrike**, const SkGlyph&, int left, int top,
                               GrColor color, GrFontScaler*);
};

#endif