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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/*
* 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 GrAtlasTextContext_DEFINED
#define GrAtlasTextContext_DEFINED
#include "GrAtlasTextBlob.h"
#include "GrDistanceFieldAdjustTable.h"
#include "GrGeometryProcessor.h"
#include "GrTextUtils.h"
#include "SkTextBlobRunIterator.h"
#if GR_TEST_UTILS
#include "GrDrawOpTest.h"
#endif
class GrDrawOp;
class GrTextBlobCache;
class SkGlyph;
/*
* Renders text using some kind of an atlas, ie BitmapText or DistanceField text
*/
class GrAtlasTextContext {
public:
static GrAtlasTextContext* Create();
bool canDraw(const SkPaint&, const SkMatrix& viewMatrix, const SkSurfaceProps&,
const GrShaderCaps&);
void drawText(GrContext*, GrTextUtils::Target*, const GrClip&, const SkPaint&,
const SkMatrix& viewMatrix, const SkSurfaceProps&, const char text[],
size_t byteLength, SkScalar x, SkScalar y, const SkIRect& regionClipBounds);
void drawPosText(GrContext*, GrTextUtils::Target*, const GrClip&, const SkPaint&,
const SkMatrix& viewMatrix, const SkSurfaceProps&, const char text[],
size_t byteLength, const SkScalar pos[], int scalarsPerPosition,
const SkPoint& offset, const SkIRect& regionClipBounds);
void drawTextBlob(GrContext*, GrTextUtils::Target*, const GrClip&, const SkPaint&,
const SkMatrix& viewMatrix, const SkSurfaceProps&, const SkTextBlob*,
SkScalar x, SkScalar y, SkDrawFilter*, const SkIRect& clipBounds);
private:
GrAtlasTextContext();
// sets up the descriptor on the blob and returns a detached cache. Client must attach
inline static SkColor ComputeCanonicalColor(const SkPaint&, bool lcd);
// Determines if we need to use fake gamma (and contrast boost):
inline static uint32_t ComputeScalerContextFlags(const GrColorSpaceInfo&);
static void RegenerateTextBlob(GrAtlasTextBlob* bmp,
GrAtlasGlyphCache*,
const GrShaderCaps&,
const GrTextUtils::Paint&,
uint32_t scalerContextFlags,
const SkMatrix& viewMatrix,
const SkSurfaceProps&,
const SkTextBlob* blob, SkScalar x, SkScalar y,
SkDrawFilter* drawFilter);
inline static bool HasLCD(const SkTextBlob*);
static inline sk_sp<GrAtlasTextBlob> MakeDrawTextBlob(GrTextBlobCache*, GrAtlasGlyphCache*,
const GrShaderCaps&,
const GrTextUtils::Paint&,
uint32_t scalerContextFlags,
const SkMatrix& viewMatrix,
const SkSurfaceProps&,
const char text[], size_t byteLength,
SkScalar x, SkScalar y);
static inline sk_sp<GrAtlasTextBlob> MakeDrawPosTextBlob(GrTextBlobCache*, GrAtlasGlyphCache*,
const GrShaderCaps&,
const GrTextUtils::Paint&,
uint32_t scalerContextFlags,
const SkMatrix& viewMatrix,
const SkSurfaceProps&,
const char text[], size_t byteLength,
const SkScalar pos[],
int scalarsPerPosition,
const SkPoint& offset);
// Functions for appending BMP text to GrAtlasTextBlob
static void DrawBmpText(GrAtlasTextBlob*, int runIndex, GrAtlasGlyphCache*,
const SkSurfaceProps&, const GrTextUtils::Paint& paint,
uint32_t scalerContextFlags, const SkMatrix& viewMatrix,
const char text[], size_t byteLength, SkScalar x, SkScalar y);
static void DrawBmpPosText(GrAtlasTextBlob*, int runIndex, GrAtlasGlyphCache*,
const SkSurfaceProps&, const GrTextUtils::Paint& paint,
uint32_t scalerContextFlags, const SkMatrix& viewMatrix,
const char text[], size_t byteLength, const SkScalar pos[],
int scalarsPerPosition, const SkPoint& offset);
// functions for appending distance field text
static bool CanDrawAsDistanceFields(const SkPaint& skPaint, const SkMatrix& viewMatrix,
const SkSurfaceProps& props, const GrShaderCaps& caps);
static void DrawDFText(GrAtlasTextBlob* blob, int runIndex, GrAtlasGlyphCache*,
const SkSurfaceProps&, const GrTextUtils::Paint& paint,
uint32_t scalerContextFlags, const SkMatrix& viewMatrix,
const char text[], size_t byteLength, SkScalar x, SkScalar y);
static void DrawDFPosText(GrAtlasTextBlob* blob, int runIndex, GrAtlasGlyphCache*,
const SkSurfaceProps&, const GrTextUtils::Paint& paint,
uint32_t scalerContextFlags, const SkMatrix& viewMatrix,
const char text[], size_t byteLength, const SkScalar pos[],
int scalarsPerPosition, const SkPoint& offset);
static void InitDistanceFieldPaint(GrAtlasTextBlob* blob,
SkPaint* skPaint,
SkScalar* textRatio,
const SkMatrix& viewMatrix);
static void BmpAppendGlyph(GrAtlasTextBlob*, int runIndex, GrAtlasGlyphCache*,
GrAtlasTextStrike**, const SkGlyph&, int left, int top,
GrColor color, SkGlyphCache*);
static bool DfAppendGlyph(GrAtlasTextBlob*, int runIndex, GrAtlasGlyphCache*,
GrAtlasTextStrike**, const SkGlyph&, SkScalar sx, SkScalar sy,
GrColor color, SkGlyphCache* cache, SkScalar textRatio,
const SkMatrix& viewMatrix);
const GrDistanceFieldAdjustTable* dfAdjustTable() const { return fDistanceAdjustTable.get(); }
sk_sp<const GrDistanceFieldAdjustTable> fDistanceAdjustTable;
#if GR_TEST_UTILS
static const uint32_t kTextBlobOpScalerContextFlags =
SkPaint::kFakeGammaAndBoostContrast_ScalerContextFlags;
GR_DRAW_OP_TEST_FRIEND(GrAtlasTextOp);
#endif
};
#endif
|
