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- /*
- * Copyright 2017 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/core/SkStream.h"
- #include "src/core/SkFontDescriptor.h"
- #include "src/core/SkMakeUnique.h"
- #include "src/ports/SkFontMgr_custom.h"
- struct SkEmbeddedResource { const uint8_t* data; size_t size; };
- struct SkEmbeddedResourceHeader { const SkEmbeddedResource* entries; int count; };
- class EmbeddedSystemFontLoader : public SkFontMgr_Custom::SystemFontLoader {
- public:
- EmbeddedSystemFontLoader(const SkEmbeddedResourceHeader* header) : fHeader(header) { }
- void loadSystemFonts(const SkTypeface_FreeType::Scanner& scanner,
- SkFontMgr_Custom::Families* families) const override
- {
- for (int i = 0; i < fHeader->count; ++i) {
- const SkEmbeddedResource& fontEntry = fHeader->entries[i];
- load_embedded_font(scanner, fontEntry.data, fontEntry.size, i, families);
- }
- if (families->empty()) {
- SkFontStyleSet_Custom* family = new SkFontStyleSet_Custom(SkString());
- families->push_back().reset(family);
- family->appendTypeface(sk_make_sp<SkTypeface_Empty>());
- }
- }
- private:
- static SkFontStyleSet_Custom* find_family(SkFontMgr_Custom::Families& families,
- const char familyName[])
- {
- for (int i = 0; i < families.count(); ++i) {
- if (families[i]->getFamilyName().equals(familyName)) {
- return families[i].get();
- }
- }
- return nullptr;
- }
- static void load_embedded_font(const SkTypeface_FreeType::Scanner& scanner,
- const uint8_t* data, size_t size, int index,
- SkFontMgr_Custom::Families* families)
- {
- auto stream = skstd::make_unique<SkMemoryStream>(data, size, false);
- int numFaces;
- if (!scanner.recognizedFont(stream.get(), &numFaces)) {
- SkDebugf("---- failed to open <%d> as a font\n", index);
- return;
- }
- for (int faceIndex = 0; faceIndex < numFaces; ++faceIndex) {
- bool isFixedPitch;
- SkString realname;
- SkFontStyle style = SkFontStyle(); // avoid uninitialized warning
- if (!scanner.scanFont(stream.get(), faceIndex,
- &realname, &style, &isFixedPitch, nullptr))
- {
- SkDebugf("---- failed to open <%d> <%d> as a font\n", index, faceIndex);
- return;
- }
- SkFontStyleSet_Custom* addTo = find_family(*families, realname.c_str());
- if (nullptr == addTo) {
- addTo = new SkFontStyleSet_Custom(realname);
- families->push_back().reset(addTo);
- }
- auto data = skstd::make_unique<SkFontData>(std::move(stream), faceIndex, nullptr, 0);
- addTo->appendTypeface(sk_make_sp<SkTypeface_Stream>(std::move(data),
- style, isFixedPitch,
- true, realname));
- }
- }
- const SkEmbeddedResourceHeader* fHeader;
- };
- sk_sp<SkFontMgr> SkFontMgr_New_Custom_Embedded(const SkEmbeddedResourceHeader* header) {
- return sk_make_sp<SkFontMgr_Custom>(EmbeddedSystemFontLoader(header));
- }
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