| // Copyright 2018 Google LLC. |
| // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. |
| #ifndef SkPDFGlyphUse_DEFINED |
| #define SkPDFGlyphUse_DEFINED |
| |
| #include "include/core/SkTypes.h" |
| #include "src/utils/SkBitSet.h" |
| |
| class SkPDFGlyphUse { |
| public: |
| SkPDFGlyphUse() : fBitSet(0) {} |
| SkPDFGlyphUse(SkGlyphID firstNonZero, SkGlyphID lastGlyph) |
| : fBitSet(lastGlyph - firstNonZero + 2) |
| , fFirstNonZero(firstNonZero) |
| , fLastGlyph(lastGlyph) { SkASSERT(firstNonZero >= 1); } |
| ~SkPDFGlyphUse() = default; |
| SkPDFGlyphUse(SkPDFGlyphUse&&) = default; |
| SkPDFGlyphUse& operator=(SkPDFGlyphUse&&) = default; |
| |
| SkGlyphID firstNonZero() const { return fFirstNonZero; } |
| SkGlyphID lastGlyph() const { return fLastGlyph; } |
| void set(SkGlyphID gid) { fBitSet.set(this->toCode(gid)); } |
| bool has(SkGlyphID gid) const { return fBitSet.test(this->toCode(gid)); } |
| |
| template<typename FN> |
| void getSetValues(FN f) const { |
| if (fFirstNonZero == 1) { |
| return fBitSet.forEachSetIndex(std::move(f)); |
| } |
| uint16_t offset = fFirstNonZero - 1; |
| fBitSet.forEachSetIndex([&f, offset](unsigned v) { f(v == 0 ? v : v + offset); }); |
| } |
| |
| private: |
| SkBitSet fBitSet; |
| SkGlyphID fFirstNonZero = 0; |
| SkGlyphID fLastGlyph = 0; |
| |
| uint16_t toCode(SkGlyphID gid) const { |
| if (gid == 0 || fFirstNonZero == 1) { |
| return gid; |
| } |
| SkASSERT(gid >= fFirstNonZero && gid <= fLastGlyph); |
| return gid - fFirstNonZero + 1; |
| } |
| SkPDFGlyphUse(const SkPDFGlyphUse&) = delete; |
| SkPDFGlyphUse& operator=(const SkPDFGlyphUse&) = delete; |
| }; |
| #endif // SkPDFGlyphUse_DEFINED |