1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrTextContext_DEFINED
#define GrTextContext_DEFINED
#include "GrGlyph.h"
#include "GrPaint.h"
#include "SkDeviceProperties.h"
#include "SkPostConfig.h"
class GrContext;
class GrDrawTarget;
class GrFontScaler;
/*
* This class wraps the state for a single text render
*/
class GrTextContext {
public:
virtual ~GrTextContext();
bool drawText(GrRenderTarget* rt, const GrPaint&, const SkPaint&, const SkMatrix& viewMatrix,
const char text[], size_t byteLength, SkScalar x, SkScalar y);
bool drawPosText(GrRenderTarget* rt, const GrPaint&, const SkPaint&, const SkMatrix& viewMatrix,
const char text[], size_t byteLength,
const SkScalar pos[], int scalarsPerPosition,
const SkPoint& offset);
protected:
GrTextContext* fFallbackTextContext;
GrContext* fContext;
SkDeviceProperties fDeviceProperties;
SkAutoTUnref<GrRenderTarget> fRenderTarget;
GrDrawTarget* fDrawTarget;
SkIRect fClipRect;
GrPaint fPaint;
SkPaint fSkPaint;
GrTextContext(GrContext*, const SkDeviceProperties&);
virtual bool canDraw(const SkPaint& paint, const SkMatrix& viewMatrix) = 0;
virtual void onDrawText(GrRenderTarget*, const GrPaint&, const SkPaint&,
const SkMatrix& viewMatrix, const char text[], size_t byteLength,
SkScalar x, SkScalar y) = 0;
virtual void onDrawPosText(GrRenderTarget*, const GrPaint&, const SkPaint&,
const SkMatrix& viewMatrix,
const char text[], size_t byteLength,
const SkScalar pos[], int scalarsPerPosition,
const SkPoint& offset) = 0;
void init(GrRenderTarget*, const GrPaint&, const SkPaint&);
void finish() { fDrawTarget = NULL; }
static GrFontScaler* GetGrFontScaler(SkGlyphCache* cache);
// sets extent in stopVector and returns glyph count
static int MeasureText(SkGlyphCache* cache, SkDrawCacheProc glyphCacheProc,
const char text[], size_t byteLength, SkVector* stopVector);
};
#endif
|
