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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/*
* 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 "GrTextContext.h"
#include "GrAtlasTextBlob.h"
#include "GrGeometryProcessor.h"
#include "SkTextBlob.h"
#ifdef GR_TEST_UTILS
#include "GrBatchTest.h"
#endif
class GrDrawBatch;
class GrDrawContext;
class GrDrawTarget;
class GrPipelineBuilder;
class GrTextBlobCache;
class SkGlyph;
/*
* This class implements GrTextContext using standard bitmap fonts, and can also process textblobs.
* TODO replace GrBitmapTextContext
*/
class GrAtlasTextContext : public GrTextContext {
public:
static GrAtlasTextContext* Create(GrContext*, const SkSurfaceProps&);
private:
GrAtlasTextContext(GrContext*, const SkSurfaceProps&);
~GrAtlasTextContext() override {}
bool canDraw(const GrRenderTarget*, const GrClip&, const GrPaint&,
const SkPaint&, const SkMatrix& viewMatrix) override;
void onDrawText(GrDrawContext*, GrRenderTarget*, const GrClip&, const GrPaint&, const SkPaint&,
const SkMatrix& viewMatrix, const char text[], size_t byteLength,
SkScalar x, SkScalar y, const SkIRect& regionClipBounds) override;
void onDrawPosText(GrDrawContext*, GrRenderTarget*, const GrClip&, const GrPaint&,
const SkPaint&, const SkMatrix& viewMatrix,
const char text[], size_t byteLength,
const SkScalar pos[], int scalarsPerPosition,
const SkPoint& offset, const SkIRect& regionClipBounds) override;
void drawTextBlob(GrDrawContext*, GrRenderTarget*, const GrClip&, const SkPaint&,
const SkMatrix& viewMatrix, const SkTextBlob*, SkScalar x, SkScalar y,
SkDrawFilter*, const SkIRect& clipBounds) override;
typedef GrAtlasTextBlob::Run Run;
typedef Run::SubRunInfo PerSubRunInfo;
inline bool canDrawAsDistanceFields(const SkPaint&, const SkMatrix& viewMatrix);
GrAtlasTextBlob* setupDFBlob(int glyphCount, const SkPaint& origPaint,
const SkMatrix& viewMatrix, SkGlyphCache** cache,
SkPaint* dfPaint, SkScalar* textRatio);
void bmpAppendGlyph(GrAtlasTextBlob*, int runIndex, const SkGlyph&, int left, int top,
GrColor color, GrFontScaler*, const SkIRect& clipRect);
bool dfAppendGlyph(GrAtlasTextBlob*, int runIndex, const SkGlyph&, SkScalar sx, SkScalar sy,
GrColor color, GrFontScaler*, const SkIRect& clipRect, SkScalar textRatio,
const SkMatrix& viewMatrix);
inline void appendGlyphPath(GrAtlasTextBlob*, GrGlyph*, GrFontScaler*, const SkGlyph&,
SkScalar x, SkScalar y, SkScalar scale = 1.0f,
bool applyVM = false);
inline void appendGlyphCommon(GrAtlasTextBlob*, Run*, Run::SubRunInfo*,
const SkRect& positions, GrColor color,
size_t vertexStride, bool useVertexColor,
GrGlyph*);
inline void flushRunAsPaths(GrDrawContext*, GrRenderTarget*,
const SkTextBlob::RunIterator&, const GrClip& clip,
const SkPaint&, SkDrawFilter*,
const SkMatrix& viewMatrix, const SkIRect& clipBounds, SkScalar x,
SkScalar y);
inline GrDrawBatch* createBatch(GrAtlasTextBlob*, const PerSubRunInfo&,
int glyphCount, int run, int subRun,
GrColor, SkScalar transX, SkScalar transY,
const SkPaint&);
inline void flushRun(GrDrawContext*, GrPipelineBuilder*, GrAtlasTextBlob*, int run, GrColor,
SkScalar transX, SkScalar transY, const SkPaint&);
inline void flushBigGlyphs(GrAtlasTextBlob* cacheBlob, GrDrawContext*, GrRenderTarget*,
const GrClip& clip, const SkPaint& skPaint,
SkScalar transX, SkScalar transY, const SkIRect& clipBounds);
// We have to flush SkTextBlobs differently from drawText / drawPosText
void flush(const SkTextBlob*, GrAtlasTextBlob*, GrDrawContext*, GrRenderTarget*,
const SkPaint&, const GrPaint&, SkDrawFilter*, const GrClip&,
const SkMatrix& viewMatrix, const SkIRect& clipBounds, SkScalar x, SkScalar y,
SkScalar transX, SkScalar transY);
void flush(GrAtlasTextBlob*, GrDrawContext*, GrRenderTarget*, const SkPaint&,
const GrPaint&, const GrClip&, const SkIRect& clipBounds);
// A helper for drawing BitmapText in a run of distance fields
inline void fallbackDrawPosText(GrAtlasTextBlob*, int runIndex,
GrRenderTarget*, const GrClip&, GrColor color,
const SkPaint&, const SkMatrix& viewMatrix,
const SkTDArray<char>& fallbackTxt,
const SkTDArray<SkScalar>& fallbackPos,
int scalarsPerPosition,
const SkPoint& offset,
const SkIRect& clipRect);
void internalDrawBMPText(GrAtlasTextBlob*, int runIndex, SkGlyphCache*, const SkPaint&,
GrColor color, const SkMatrix& viewMatrix,
const char text[], size_t byteLength,
SkScalar x, SkScalar y, const SkIRect& clipRect);
void internalDrawBMPPosText(GrAtlasTextBlob*, int runIndex, SkGlyphCache*, const SkPaint&,
GrColor color, const SkMatrix& viewMatrix,
const char text[], size_t byteLength,
const SkScalar pos[], int scalarsPerPosition,
const SkPoint& offset, const SkIRect& clipRect);
void internalDrawDFText(GrAtlasTextBlob*, int runIndex, SkGlyphCache*, const SkPaint&,
GrColor color, const SkMatrix& viewMatrix,
const char text[], size_t byteLength,
SkScalar x, SkScalar y, const SkIRect& clipRect,
SkScalar textRatio,
SkTDArray<char>* fallbackTxt,
SkTDArray<SkScalar>* fallbackPos,
SkPoint* offset, const SkPaint& origPaint);
void internalDrawDFPosText(GrAtlasTextBlob*, int runIndex, SkGlyphCache*, const SkPaint&,
GrColor color, const SkMatrix& viewMatrix,
const char text[], size_t byteLength,
const SkScalar pos[], int scalarsPerPosition,
const SkPoint& offset, const SkIRect& clipRect,
SkScalar textRatio,
SkTDArray<char>* fallbackTxt,
SkTDArray<SkScalar>* fallbackPos);
// sets up the descriptor on the blob and returns a detached cache. Client must attach
inline static GrColor ComputeCanonicalColor(const SkPaint&, bool lcd);
inline SkGlyphCache* setupCache(Run*, const SkPaint&, const SkMatrix* viewMatrix, bool noGamma);
static inline bool MustRegenerateBlob(SkScalar* outTransX, SkScalar* outTransY,
const GrAtlasTextBlob&, const SkPaint&, GrColor,
const SkMaskFilter::BlurRec&,
const SkMatrix& viewMatrix, SkScalar x, SkScalar y);
void regenerateTextBlob(GrAtlasTextBlob* bmp, const SkPaint& skPaint, GrColor,
const SkMatrix& viewMatrix,
const SkTextBlob* blob, SkScalar x, SkScalar y,
SkDrawFilter* drawFilter, const SkIRect& clipRect, GrRenderTarget*,
const GrClip&);
inline static bool HasLCD(const SkTextBlob*);
inline void initDistanceFieldPaint(GrAtlasTextBlob*, SkPaint*, SkScalar* textRatio,
const SkMatrix&);
// Test methods
// TODO this is really ugly. It'd be much nicer if positioning could be moved to batch
inline GrAtlasTextBlob* createDrawTextBlob(GrRenderTarget*, const GrClip&, const GrPaint&,
const SkPaint&, const SkMatrix& viewMatrix,
const char text[], size_t byteLength,
SkScalar x, SkScalar y,
const SkIRect& regionClipBounds);
inline GrAtlasTextBlob* createDrawPosTextBlob(GrRenderTarget*, const GrClip&, const GrPaint&,
const SkPaint&, const SkMatrix& viewMatrix,
const char text[], size_t byteLength,
const SkScalar pos[], int scalarsPerPosition,
const SkPoint& offset,
const SkIRect& regionClipBounds);
// Distance field text needs this table to compute a value for use in the fragment shader.
// Because the GrAtlasTextContext can go out of scope before the final flush, this needs to be
// refcnted and malloced
struct DistanceAdjustTable : public SkNVRefCnt<DistanceAdjustTable> {
DistanceAdjustTable() { this->buildDistanceAdjustTable(); }
~DistanceAdjustTable() { delete[] fTable; }
const SkScalar& operator[] (int i) const {
return fTable[i];
}
private:
void buildDistanceAdjustTable();
SkScalar* fTable;
};
GrBatchTextStrike* fCurrStrike;
GrTextBlobCache* fCache;
SkAutoTUnref<const DistanceAdjustTable> fDistanceAdjustTable;
friend class GrTextBlobCache;
friend class TextBatch;
#ifdef GR_TEST_UTILS
DRAW_BATCH_TEST_FRIEND(TextBlobBatch);
#endif
typedef GrTextContext INHERITED;
};
#endif
|
