1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 #include "ScaledFontBase.h"
8
9 #include "PathSkia.h"
10 #include "skia/include/core/SkFont.h"
11
12 #ifdef USE_CAIRO
13 # include "PathCairo.h"
14 # include "DrawTargetCairo.h"
15 # include "HelpersCairo.h"
16 #endif
17
18 #include <vector>
19 #include <cmath>
20
21 namespace mozilla {
22 namespace gfx {
23
24 Atomic<uint32_t> UnscaledFont::sDeletionCounter(0);
25
~UnscaledFont()26 UnscaledFont::~UnscaledFont() { sDeletionCounter++; }
27
28 Atomic<uint32_t> ScaledFont::sDeletionCounter(0);
29
~ScaledFont()30 ScaledFont::~ScaledFont() { sDeletionCounter++; }
31
~ScaledFontBase()32 ScaledFontBase::~ScaledFontBase() {
33 SkSafeUnref<SkTypeface>(mTypeface);
34 cairo_scaled_font_destroy(mScaledFont);
35 }
36
ScaledFontBase(const RefPtr<UnscaledFont> & aUnscaledFont,Float aSize)37 ScaledFontBase::ScaledFontBase(const RefPtr<UnscaledFont>& aUnscaledFont,
38 Float aSize)
39 : ScaledFont(aUnscaledFont),
40 mTypeface(nullptr),
41 mScaledFont(nullptr),
42 mSize(aSize) {}
43
GetSkTypeface()44 SkTypeface* ScaledFontBase::GetSkTypeface() {
45 if (!mTypeface) {
46 SkTypeface* typeface = CreateSkTypeface();
47 if (!mTypeface.compareExchange(nullptr, typeface)) {
48 SkSafeUnref(typeface);
49 }
50 }
51 return mTypeface;
52 }
53
GetCairoScaledFont()54 cairo_scaled_font_t* ScaledFontBase::GetCairoScaledFont() {
55 if (mScaledFont) {
56 return mScaledFont;
57 }
58
59 cairo_font_options_t* fontOptions = cairo_font_options_create();
60 cairo_font_face_t* fontFace = CreateCairoFontFace(fontOptions);
61 if (!fontFace) {
62 cairo_font_options_destroy(fontOptions);
63 return nullptr;
64 }
65
66 cairo_matrix_t sizeMatrix;
67 cairo_matrix_t identityMatrix;
68
69 cairo_matrix_init_scale(&sizeMatrix, mSize, mSize);
70 cairo_matrix_init_identity(&identityMatrix);
71
72 cairo_scaled_font_t* scaledFont = cairo_scaled_font_create(
73 fontFace, &sizeMatrix, &identityMatrix, fontOptions);
74
75 cairo_font_options_destroy(fontOptions);
76 cairo_font_face_destroy(fontFace);
77
78 if (cairo_scaled_font_status(scaledFont) != CAIRO_STATUS_SUCCESS) {
79 cairo_scaled_font_destroy(scaledFont);
80 return nullptr;
81 }
82
83 PrepareCairoScaledFont(scaledFont);
84 mScaledFont = scaledFont;
85 return mScaledFont;
86 }
87
GetSkiaPathForGlyphs(const GlyphBuffer & aBuffer)88 SkPath ScaledFontBase::GetSkiaPathForGlyphs(const GlyphBuffer& aBuffer) {
89 SkTypeface* typeFace = GetSkTypeface();
90 MOZ_ASSERT(typeFace);
91
92 SkFont font(sk_ref_sp(typeFace), SkFloatToScalar(mSize));
93
94 std::vector<uint16_t> indices;
95 indices.resize(aBuffer.mNumGlyphs);
96 for (unsigned int i = 0; i < aBuffer.mNumGlyphs; i++) {
97 indices[i] = aBuffer.mGlyphs[i].mIndex;
98 }
99
100 struct Context {
101 const Glyph* mGlyph;
102 SkPath mPath;
103 } ctx = {aBuffer.mGlyphs};
104
105 font.getPaths(
106 indices.data(), indices.size(),
107 [](const SkPath* glyphPath, const SkMatrix& scaleMatrix, void* ctxPtr) {
108 Context& ctx = *reinterpret_cast<Context*>(ctxPtr);
109 if (glyphPath) {
110 SkMatrix transMatrix(scaleMatrix);
111 transMatrix.postTranslate(SkFloatToScalar(ctx.mGlyph->mPosition.x),
112 SkFloatToScalar(ctx.mGlyph->mPosition.y));
113 ctx.mPath.addPath(*glyphPath, transMatrix);
114 }
115 ++ctx.mGlyph;
116 },
117 &ctx);
118
119 return ctx.mPath;
120 }
121
GetPathForGlyphs(const GlyphBuffer & aBuffer,const DrawTarget * aTarget)122 already_AddRefed<Path> ScaledFontBase::GetPathForGlyphs(
123 const GlyphBuffer& aBuffer, const DrawTarget* aTarget) {
124 if (aTarget->GetBackendType() == BackendType::SKIA) {
125 SkPath path = GetSkiaPathForGlyphs(aBuffer);
126 return MakeAndAddRef<PathSkia>(path, FillRule::FILL_WINDING);
127 }
128 #ifdef USE_CAIRO
129 if (aTarget->GetBackendType() == BackendType::CAIRO) {
130 MOZ_ASSERT(mScaledFont);
131
132 DrawTarget* dt = const_cast<DrawTarget*>(aTarget);
133 cairo_t* ctx = static_cast<cairo_t*>(
134 dt->GetNativeSurface(NativeSurfaceType::CAIRO_CONTEXT));
135
136 bool isNewContext = !ctx;
137 if (!ctx) {
138 ctx = cairo_create(DrawTargetCairo::GetDummySurface());
139 cairo_matrix_t mat;
140 GfxMatrixToCairoMatrix(aTarget->GetTransform(), mat);
141 cairo_set_matrix(ctx, &mat);
142 }
143
144 cairo_set_scaled_font(ctx, mScaledFont);
145
146 // Convert our GlyphBuffer into an array of Cairo glyphs.
147 std::vector<cairo_glyph_t> glyphs(aBuffer.mNumGlyphs);
148 for (uint32_t i = 0; i < aBuffer.mNumGlyphs; ++i) {
149 glyphs[i].index = aBuffer.mGlyphs[i].mIndex;
150 glyphs[i].x = aBuffer.mGlyphs[i].mPosition.x;
151 glyphs[i].y = aBuffer.mGlyphs[i].mPosition.y;
152 }
153
154 cairo_new_path(ctx);
155
156 cairo_glyph_path(ctx, &glyphs[0], aBuffer.mNumGlyphs);
157
158 RefPtr<PathCairo> newPath = new PathCairo(ctx);
159 if (isNewContext) {
160 cairo_destroy(ctx);
161 }
162
163 return newPath.forget();
164 }
165 #endif
166 RefPtr<PathBuilder> builder = aTarget->CreatePathBuilder();
167 SkPath skPath = GetSkiaPathForGlyphs(aBuffer);
168 RefPtr<Path> path = MakeAndAddRef<PathSkia>(skPath, FillRule::FILL_WINDING);
169 path->StreamToSink(builder);
170 return builder->Finish();
171 }
172
CopyGlyphsToBuilder(const GlyphBuffer & aBuffer,PathBuilder * aBuilder,const Matrix * aTransformHint)173 void ScaledFontBase::CopyGlyphsToBuilder(const GlyphBuffer& aBuffer,
174 PathBuilder* aBuilder,
175 const Matrix* aTransformHint) {
176 BackendType backendType = aBuilder->GetBackendType();
177 if (backendType == BackendType::SKIA) {
178 PathBuilderSkia* builder = static_cast<PathBuilderSkia*>(aBuilder);
179 builder->AppendPath(GetSkiaPathForGlyphs(aBuffer));
180 return;
181 }
182 #ifdef USE_CAIRO
183 if (backendType == BackendType::CAIRO) {
184 MOZ_ASSERT(mScaledFont);
185
186 PathBuilderCairo* builder = static_cast<PathBuilderCairo*>(aBuilder);
187 cairo_t* ctx = cairo_create(DrawTargetCairo::GetDummySurface());
188
189 if (aTransformHint) {
190 cairo_matrix_t mat;
191 GfxMatrixToCairoMatrix(*aTransformHint, mat);
192 cairo_set_matrix(ctx, &mat);
193 }
194
195 // Convert our GlyphBuffer into an array of Cairo glyphs.
196 std::vector<cairo_glyph_t> glyphs(aBuffer.mNumGlyphs);
197 for (uint32_t i = 0; i < aBuffer.mNumGlyphs; ++i) {
198 glyphs[i].index = aBuffer.mGlyphs[i].mIndex;
199 glyphs[i].x = aBuffer.mGlyphs[i].mPosition.x;
200 glyphs[i].y = aBuffer.mGlyphs[i].mPosition.y;
201 }
202
203 cairo_set_scaled_font(ctx, mScaledFont);
204 cairo_glyph_path(ctx, &glyphs[0], aBuffer.mNumGlyphs);
205
206 RefPtr<PathCairo> cairoPath = new PathCairo(ctx);
207 cairo_destroy(ctx);
208
209 cairoPath->AppendPathToBuilder(builder);
210 return;
211 }
212 #endif
213 if (backendType == BackendType::RECORDING) {
214 SkPath skPath = GetSkiaPathForGlyphs(aBuffer);
215 RefPtr<Path> path = MakeAndAddRef<PathSkia>(skPath, FillRule::FILL_WINDING);
216 path->StreamToSink(aBuilder);
217 return;
218 }
219 MOZ_ASSERT(false, "Path not being copied");
220 }
221
222 } // namespace gfx
223 } // namespace mozilla
224