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
|
/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrTextUtils.h"
#include "GrContext.h"
#include "SkDrawFilter.h"
#include "SkDrawProcs.h"
#include "SkGlyphCache.h"
#include "SkGr.h"
#include "SkPaint.h"
#include "SkTextBlobRunIterator.h"
#include "SkTextMapStateProc.h"
#include "SkTextToPathIter.h"
void GrTextUtils::Paint::initFilteredColor() {
// This mirrors the logic in skpaint_to_grpaint_impl for handling paint colors
if (fDstColorSpaceInfo->colorSpace()) {
GrColor4f filteredColor =
SkColorToUnpremulGrColor4f(fPaint->getColor(), *fDstColorSpaceInfo);
if (fPaint->getColorFilter()) {
filteredColor = GrColor4f::FromSkColor4f(
fPaint->getColorFilter()->filterColor4f(filteredColor.toSkColor4f()));
}
fFilteredPremulColor = filteredColor.premul().toGrColor();
} else {
SkColor filteredSkColor = fPaint->getColor();
if (fPaint->getColorFilter()) {
filteredSkColor = fPaint->getColorFilter()->filterColor(filteredSkColor);
}
fFilteredPremulColor = SkColorToPremulGrColor(filteredSkColor);
}
}
bool GrTextUtils::RunPaint::modifyForRun(const SkTextBlobRunIterator& run) {
if (!fModifiedPaint.isValid()) {
fModifiedPaint.init(fOriginalPaint->skPaint());
fPaint = fModifiedPaint.get();
} else if (fFilter) {
// We have to reset before applying the run because the filter could have arbitrary
// changed the paint.
*fModifiedPaint.get() = fOriginalPaint->skPaint();
}
run.applyFontToPaint(fModifiedPaint.get());
if (fFilter) {
if (!fFilter->filter(fModifiedPaint.get(), SkDrawFilter::kText_Type)) {
// A false return from filter() means we should abort the current draw.
return false;
}
// The draw filter could have changed either the paint color or color filter.
this->initFilteredColor();
}
fModifiedPaint.get()->setFlags(FilterTextFlags(fProps, *fModifiedPaint.get()));
return true;
}
uint32_t GrTextUtils::FilterTextFlags(const SkSurfaceProps& surfaceProps, const SkPaint& paint) {
uint32_t flags = paint.getFlags();
if (!paint.isLCDRenderText() || !paint.isAntiAlias()) {
return flags;
}
if (kUnknown_SkPixelGeometry == surfaceProps.pixelGeometry() || ShouldDisableLCD(paint)) {
flags &= ~SkPaint::kLCDRenderText_Flag;
flags |= SkPaint::kGenA8FromLCD_Flag;
}
return flags;
}
bool GrTextUtils::ShouldDisableLCD(const SkPaint& paint) {
return paint.getMaskFilter() || paint.getRasterizer() || paint.getPathEffect() ||
paint.isFakeBoldText() || paint.getStyle() != SkPaint::kFill_Style;
}
void GrTextUtils::DrawBigText(GrContext* context, GrTextUtils::Target* target,
const GrClip& clip, const SkPaint& paint,
const SkMatrix& viewMatrix, const char text[], size_t byteLength,
SkScalar x, SkScalar y, const SkIRect& clipBounds) {
if (!paint.countText(text, byteLength)) {
return;
}
SkTextToPathIter iter(text, byteLength, paint, true);
SkMatrix matrix;
matrix.setScale(iter.getPathScale(), iter.getPathScale());
matrix.postTranslate(x, y);
const SkPath* iterPath;
SkScalar xpos, prevXPos = 0;
while (iter.next(&iterPath, &xpos)) {
matrix.postTranslate(xpos - prevXPos, 0);
if (iterPath) {
const SkPaint& pnt = iter.getPaint();
target->drawPath(clip, *iterPath, pnt, viewMatrix, &matrix, clipBounds);
}
prevXPos = xpos;
}
}
void GrTextUtils::DrawBigPosText(GrContext* context, GrTextUtils::Target* target,
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) {
if (!origPaint.countText(text, byteLength)) {
return;
}
// setup our std paint, in hopes of getting hits in the cache
SkPaint paint(origPaint);
SkScalar matrixScale = paint.setupForAsPaths();
SkMatrix matrix;
matrix.setScale(matrixScale, matrixScale);
// Temporarily jam in kFill, so we only ever ask for the raw outline from the cache.
paint.setStyle(SkPaint::kFill_Style);
paint.setPathEffect(nullptr);
SkPaint::GlyphCacheProc glyphCacheProc = SkPaint::GetGlyphCacheProc(paint.getTextEncoding(),
paint.isDevKernText(),
true);
SkAutoGlyphCache autoCache(paint, &props, nullptr);
SkGlyphCache* cache = autoCache.getCache();
const char* stop = text + byteLength;
SkTextAlignProc alignProc(paint.getTextAlign());
SkTextMapStateProc tmsProc(SkMatrix::I(), offset, scalarsPerPosition);
// Now restore the original settings, so we "draw" with whatever style/stroking.
paint.setStyle(origPaint.getStyle());
paint.setPathEffect(origPaint.refPathEffect());
while (text < stop) {
const SkGlyph& glyph = glyphCacheProc(cache, &text);
if (glyph.fWidth) {
const SkPath* path = cache->findPath(glyph);
if (path) {
SkPoint tmsLoc;
tmsProc(pos, &tmsLoc);
SkPoint loc;
alignProc(tmsLoc, glyph, &loc);
matrix[SkMatrix::kMTransX] = loc.fX;
matrix[SkMatrix::kMTransY] = loc.fY;
target->drawPath(clip, *path, paint, viewMatrix, &matrix, clipBounds);
}
}
pos += scalarsPerPosition;
}
}
|
