Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(3)

Side by Side Diff: src/gpu/GrTextContext.cpp

Issue 1521453002: Move all text stuff to its own folder (Closed) Base URL: https://skia.googlesource.com/skia.git@cleanuptext11textutils2
Patch Set: Created 5 years ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
« no previous file with comments | « src/gpu/GrTextContext.h ('k') | src/gpu/GrTextUtils.h » ('j') | no next file with comments »
Toggle Intra-line Diffs ('i') | Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
OLDNEW
(Empty)
1 /*
2 * Copyright 2010 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "GrTextContext.h"
9 #include "GrContext.h"
10 #include "GrFontScaler.h"
11 #include "GrTextUtils.h"
12
13 #include "SkDrawFilter.h"
14 #include "SkGlyphCache.h"
15 #include "SkGrPriv.h"
16 #include "SkTextBlobRunIterator.h"
17
18 GrTextContext::GrTextContext(GrContext* context, const SkSurfaceProps& surfacePr ops)
19 : fFallbackTextContext(nullptr)
20 , fContext(context)
21 , fSurfaceProps(surfaceProps) {
22 }
23
24 GrTextContext::~GrTextContext() {
25 delete fFallbackTextContext;
26 }
27
28 void GrTextContext::drawText(GrDrawContext* dc,
29 const GrClip& clip, const GrPaint& paint,
30 const SkPaint& skPaint, const SkMatrix& viewMatrix,
31 const char text[], size_t byteLength,
32 SkScalar x, SkScalar y, const SkIRect& clipBounds) {
33 if (fContext->abandoned()) {
34 return;
35 }
36
37 GrTextContext* textContext = this;
38 do {
39 if (textContext->canDraw(skPaint, viewMatrix)) {
40 textContext->onDrawText(dc, clip, paint, skPaint, viewMatrix,
41 text, byteLength, x, y, clipBounds);
42 return;
43 }
44 textContext = textContext->fFallbackTextContext;
45 } while (textContext);
46
47 // fall back to drawing as a path
48 GrTextUtils::DrawTextAsPath(fContext, dc, clip, skPaint, viewMatrix, text, b yteLength, x, y,
49 clipBounds);
50 }
51
52 void GrTextContext::drawPosText(GrDrawContext* dc,
53 const GrClip& clip, const GrPaint& paint,
54 const SkPaint& skPaint, const SkMatrix& viewMatr ix,
55 const char text[], size_t byteLength,
56 const SkScalar pos[], int scalarsPerPosition,
57 const SkPoint& offset, const SkIRect& clipBounds ) {
58 if (fContext->abandoned()) {
59 return;
60 }
61
62 GrTextContext* textContext = this;
63 do {
64 if (textContext->canDraw(skPaint, viewMatrix)) {
65 textContext->onDrawPosText(dc, clip, paint, skPaint, viewMatrix,
66 text, byteLength, pos,
67 scalarsPerPosition, offset, clipBounds);
68 return;
69 }
70 textContext = textContext->fFallbackTextContext;
71 } while (textContext);
72
73 // fall back to drawing as a path
74 GrTextUtils::DrawPosTextAsPath(fContext, dc, fSurfaceProps, clip, skPaint, v iewMatrix, text,
75 byteLength, pos, scalarsPerPosition, offset, clipBounds);
76 }
77
78 bool GrTextContext::ShouldDisableLCD(const SkPaint& paint) {
79 if (!SkXfermode::AsMode(paint.getXfermode(), nullptr) ||
80 paint.getMaskFilter() ||
81 paint.getRasterizer() ||
82 paint.getPathEffect() ||
83 paint.isFakeBoldText() ||
84 paint.getStyle() != SkPaint::kFill_Style)
85 {
86 return true;
87 }
88 return false;
89 }
90
91 uint32_t GrTextContext::FilterTextFlags(const SkSurfaceProps& surfaceProps, cons t SkPaint& paint) {
92 uint32_t flags = paint.getFlags();
93
94 if (!paint.isLCDRenderText() || !paint.isAntiAlias()) {
95 return flags;
96 }
97
98 if (kUnknown_SkPixelGeometry == surfaceProps.pixelGeometry() || ShouldDisabl eLCD(paint)) {
99 flags &= ~SkPaint::kLCDRenderText_Flag;
100 flags |= SkPaint::kGenA8FromLCD_Flag;
101 }
102
103 return flags;
104 }
105
106 void GrTextContext::drawTextBlob(GrDrawContext* dc,
107 const GrClip& clip, const SkPaint& skPaint,
108 const SkMatrix& viewMatrix, const SkTextBlob* b lob,
109 SkScalar x, SkScalar y,
110 SkDrawFilter* drawFilter, const SkIRect& clipBo unds) {
111 SkPaint runPaint = skPaint;
112
113 SkTextBlobRunIterator it(blob);
114 for (;!it.done(); it.next()) {
115 size_t textLen = it.glyphCount() * sizeof(uint16_t);
116 const SkPoint& offset = it.offset();
117 // applyFontToPaint() always overwrites the exact same attributes,
118 // so it is safe to not re-seed the paint for this reason.
119 it.applyFontToPaint(&runPaint);
120
121 if (drawFilter && !drawFilter->filter(&runPaint, SkDrawFilter::kText_Typ e)) {
122 // A false return from filter() means we should abort the current dr aw.
123 runPaint = skPaint;
124 continue;
125 }
126
127 runPaint.setFlags(FilterTextFlags(fSurfaceProps, runPaint));
128
129 GrPaint grPaint;
130 if (!SkPaintToGrPaint(fContext, runPaint, viewMatrix, &grPaint)) {
131 return;
132 }
133
134 switch (it.positioning()) {
135 case SkTextBlob::kDefault_Positioning:
136 this->drawText(dc, clip, grPaint, runPaint, viewMatrix, (const char *)it.glyphs(),
137 textLen, x + offset.x(), y + offset.y(), clipBounds);
138 break;
139 case SkTextBlob::kHorizontal_Positioning:
140 this->drawPosText(dc, clip, grPaint, runPaint, viewMatrix, (const ch ar*)it.glyphs(),
141 textLen, it.pos(), 1, SkPoint::Make(x, y + offset. y()), clipBounds);
142 break;
143 case SkTextBlob::kFull_Positioning:
144 this->drawPosText(dc, clip, grPaint, runPaint, viewMatrix, (const ch ar*)it.glyphs(),
145 textLen, it.pos(), 2, SkPoint::Make(x, y), clipBou nds);
146 break;
147 default:
148 SkFAIL("unhandled positioning mode");
149 }
150
151 if (drawFilter) {
152 // A draw filter may change the paint arbitrarily, so we must re-see d in this case.
153 runPaint = skPaint;
154 }
155 }
156 }
157
158 static void GlyphCacheAuxProc(void* data) {
159 GrFontScaler* scaler = (GrFontScaler*)data;
160 SkSafeUnref(scaler);
161 }
162
163 GrFontScaler* GrTextContext::GetGrFontScaler(SkGlyphCache* cache) {
164 void* auxData;
165 GrFontScaler* scaler = nullptr;
166
167 if (cache->getAuxProcData(GlyphCacheAuxProc, &auxData)) {
168 scaler = (GrFontScaler*)auxData;
169 }
170 if (nullptr == scaler) {
171 scaler = new GrFontScaler(cache);
172 cache->setAuxProc(GlyphCacheAuxProc, scaler);
173 }
174
175 return scaler;
176 }
OLDNEW
« no previous file with comments | « src/gpu/GrTextContext.h ('k') | src/gpu/GrTextUtils.h » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698