1 /*
2 * Copyright 2017 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 "SkAtlasTextTarget.h"
9 #include "GrClip.h"
10 #include "GrContextPriv.h"
11 #include "GrDrawingManager.h"
12 #include "SkAtlasTextContext.h"
13 #include "SkAtlasTextFont.h"
14 #include "SkAtlasTextRenderer.h"
15 #include "SkGr.h"
16 #include "SkInternalAtlasTextContext.h"
17 #include "ops/GrAtlasTextOp.h"
18 #include "text/GrAtlasTextContext.h"
19
20 static constexpr int kMaxBatchLookBack = 10;
21
SkAtlasTextTarget(sk_sp<SkAtlasTextContext> context,int width,int height,void * handle)22 SkAtlasTextTarget::SkAtlasTextTarget(sk_sp<SkAtlasTextContext> context, int width, int height,
23 void* handle)
24 : fHandle(handle)
25 , fContext(std::move(context))
26 , fWidth(width)
27 , fHeight(height)
28 , fMatrixStack(sizeof(SkMatrix), 4)
29 , fSaveCnt(0) {
30 fMatrixStack.push_back();
31 this->accessCTM()->reset();
32 }
33
~SkAtlasTextTarget()34 SkAtlasTextTarget::~SkAtlasTextTarget() { fContext->renderer()->targetDeleted(fHandle); }
35
save()36 int SkAtlasTextTarget::save() {
37 const auto& currCTM = this->ctm();
38 *static_cast<SkMatrix*>(fMatrixStack.push_back()) = currCTM;
39 return fSaveCnt++;
40 }
41
restore()42 void SkAtlasTextTarget::restore() {
43 if (fSaveCnt) {
44 fMatrixStack.pop_back();
45 fSaveCnt--;
46 }
47 }
48
restoreToCount(int count)49 void SkAtlasTextTarget::restoreToCount(int count) {
50 while (fSaveCnt > count) {
51 this->restore();
52 }
53 }
54
translate(SkScalar dx,SkScalar dy)55 void SkAtlasTextTarget::translate(SkScalar dx, SkScalar dy) {
56 this->accessCTM()->preTranslate(dx, dy);
57 }
58
scale(SkScalar sx,SkScalar sy)59 void SkAtlasTextTarget::scale(SkScalar sx, SkScalar sy) { this->accessCTM()->preScale(sx, sy); }
60
rotate(SkScalar degrees)61 void SkAtlasTextTarget::rotate(SkScalar degrees) { this->accessCTM()->preRotate(degrees); }
62
rotate(SkScalar degrees,SkScalar px,SkScalar py)63 void SkAtlasTextTarget::rotate(SkScalar degrees, SkScalar px, SkScalar py) {
64 this->accessCTM()->preRotate(degrees, px, py);
65 }
66
skew(SkScalar sx,SkScalar sy)67 void SkAtlasTextTarget::skew(SkScalar sx, SkScalar sy) { this->accessCTM()->preSkew(sx, sy); }
68
concat(const SkMatrix & matrix)69 void SkAtlasTextTarget::concat(const SkMatrix& matrix) { this->accessCTM()->preConcat(matrix); }
70
71 //////////////////////////////////////////////////////////////////////////////
72
73 static const GrColorSpaceInfo kColorSpaceInfo(nullptr, kRGBA_8888_GrPixelConfig);
74
75 //////////////////////////////////////////////////////////////////////////////
76
77 class SkInternalAtlasTextTarget : public GrTextUtils::Target, public SkAtlasTextTarget {
78 public:
SkInternalAtlasTextTarget(sk_sp<SkAtlasTextContext> context,int width,int height,void * handle)79 SkInternalAtlasTextTarget(sk_sp<SkAtlasTextContext> context, int width, int height,
80 void* handle)
81 : GrTextUtils::Target(width, height, kColorSpaceInfo)
82 , SkAtlasTextTarget(std::move(context), width, height, handle) {}
83
84 /** GrTextUtils::Target overrides */
85
86 void addDrawOp(const GrClip&, std::unique_ptr<GrAtlasTextOp> op) override;
87
drawPath(const GrClip &,const SkPath &,const SkPaint &,const SkMatrix & viewMatrix,const SkMatrix * pathMatrix,const SkIRect & clipBounds)88 void drawPath(const GrClip&, const SkPath&, const SkPaint&, const SkMatrix& viewMatrix,
89 const SkMatrix* pathMatrix, const SkIRect& clipBounds) override {
90 SkDebugf("Path glyph??");
91 }
92
makeGrPaint(GrMaskFormat,const SkPaint & skPaint,const SkMatrix &,GrPaint * grPaint)93 void makeGrPaint(GrMaskFormat, const SkPaint& skPaint, const SkMatrix&,
94 GrPaint* grPaint) override {
95 grPaint->setColor4f(SkColorToPremulGrColor4fLegacy(skPaint.getColor()));
96 }
97
98 /** SkAtlasTextTarget overrides */
99
100 void drawText(const SkGlyphID[], const SkPoint[], int glyphCnt, uint32_t color,
101 const SkAtlasTextFont&) override;
102 void flush() override;
103
104 private:
105 uint32_t fColor;
106 using SkAtlasTextTarget::fWidth;
107 using SkAtlasTextTarget::fHeight;
108 SkTArray<std::unique_ptr<GrAtlasTextOp>, true> fOps;
109 };
110
111 //////////////////////////////////////////////////////////////////////////////
112
Make(sk_sp<SkAtlasTextContext> context,int width,int height,void * handle)113 std::unique_ptr<SkAtlasTextTarget> SkAtlasTextTarget::Make(sk_sp<SkAtlasTextContext> context,
114 int width, int height, void* handle) {
115 return std::unique_ptr<SkAtlasTextTarget>(
116 new SkInternalAtlasTextTarget(std::move(context), width, height, handle));
117 }
118
119 //////////////////////////////////////////////////////////////////////////////
120
drawText(const SkGlyphID glyphs[],const SkPoint positions[],int glyphCnt,uint32_t color,const SkAtlasTextFont & font)121 void SkInternalAtlasTextTarget::drawText(const SkGlyphID glyphs[], const SkPoint positions[],
122 int glyphCnt, uint32_t color,
123 const SkAtlasTextFont& font) {
124 SkPaint paint;
125 paint.setAntiAlias(true);
126 paint.setTypeface(font.refTypeface());
127 paint.setTextSize(font.size());
128 paint.setStyle(SkPaint::kFill_Style);
129 paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
130
131 // The atlas text context does munging of the paint color. We store the client's color here
132 // and then overwrite the generated op's color when addDrawOp() is called.
133 fColor = color;
134
135 SkSurfaceProps props(SkSurfaceProps::kUseDistanceFieldFonts_Flag, kUnknown_SkPixelGeometry);
136 auto* grContext = this->context()->internal().grContext();
137 auto bounds = SkIRect::MakeWH(fWidth, fHeight);
138 auto atlasTextContext = grContext->contextPriv().drawingManager()->getAtlasTextContext();
139 size_t byteLength = sizeof(SkGlyphID) * glyphCnt;
140 const SkScalar* pos = &positions->fX;
141 atlasTextContext->drawPosText(grContext, this, GrNoClip(), paint, this->ctm(), props,
142 (const char*)glyphs, byteLength, pos, 2, {0, 0}, bounds);
143 }
144
addDrawOp(const GrClip & clip,std::unique_ptr<GrAtlasTextOp> op)145 void SkInternalAtlasTextTarget::addDrawOp(const GrClip& clip, std::unique_ptr<GrAtlasTextOp> op) {
146 SkASSERT(clip.quickContains(SkRect::MakeIWH(fWidth, fHeight)));
147 // The SkAtlasTextRenderer currently only handles grayscale SDF glyphs.
148 if (op->maskType() != GrAtlasTextOp::kGrayscaleDistanceField_MaskType) {
149 return;
150 }
151 const GrCaps& caps = *this->context()->internal().grContext()->caps();
152 op->finalizeForTextTarget(fColor, caps);
153 int n = SkTMin(kMaxBatchLookBack, fOps.count());
154 for (int i = 0; i < n; ++i) {
155 GrAtlasTextOp* other = fOps.fromBack(i).get();
156 if (other->combineIfPossible(op.get(), caps)) {
157 return;
158 }
159 if (GrRectsOverlap(op->bounds(), other->bounds())) {
160 break;
161 }
162 }
163 op->visitProxies([](GrSurfaceProxy*) {});
164 fOps.emplace_back(std::move(op));
165 }
166
flush()167 void SkInternalAtlasTextTarget::flush() {
168 for (int i = 0; i < fOps.count(); ++i) {
169 fOps[i]->executeForTextTarget(this);
170 }
171 this->context()->internal().flush();
172 fOps.reset();
173 }
174
finalizeForTextTarget(uint32_t color,const GrCaps & caps)175 void GrAtlasTextOp::finalizeForTextTarget(uint32_t color, const GrCaps& caps) {
176 for (int i = 0; i < fGeoCount; ++i) {
177 fGeoData[i].fColor = color;
178 }
179 this->finalize(caps, nullptr /* applied clip */, GrPixelConfigIsClamped::kNo);
180 }
181
executeForTextTarget(SkAtlasTextTarget * target)182 void GrAtlasTextOp::executeForTextTarget(SkAtlasTextTarget* target) {
183 FlushInfo flushInfo;
184 SkAutoGlyphCache glyphCache;
185 auto& context = target->context()->internal();
186 auto* atlasGlyphCache = context.grContext()->contextPriv().getAtlasGlyphCache();
187 for (int i = 0; i < fGeoCount; ++i) {
188 GrAtlasTextBlob::VertexRegenerator regenerator(
189 fGeoData[i].fBlob, fGeoData[i].fRun, fGeoData[i].fSubRun, fGeoData[i].fViewMatrix,
190 fGeoData[i].fX, fGeoData[i].fY, fGeoData[i].fColor, &context, atlasGlyphCache,
191 &glyphCache);
192 GrAtlasTextBlob::VertexRegenerator::Result result;
193 do {
194 result = regenerator.regenerate();
195 context.recordDraw(result.fFirstVertex, result.fGlyphsRegenerated,
196 fGeoData[i].fViewMatrix, target->handle());
197 if (!result.fFinished) {
198 // Make space in the atlas so we can continue generating vertices.
199 context.flush();
200 }
201 } while (!result.fFinished);
202 }
203 }
204