| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef MINIKIN_FONT_H |
| #define MINIKIN_FONT_H |
| |
| #include <string> |
| |
| #include <minikin/MinikinRefCounted.h> |
| #include <minikin/FontFamily.h> |
| |
| // An abstraction for platform fonts, allowing Minikin to be used with |
| // multiple actual implementations of fonts. |
| |
| namespace android { |
| |
| class MinikinFont; |
| |
| // Possibly move into own .h file? |
| // Note: if you add a field here, either add it to LayoutCacheKey or to skipCache() |
| struct MinikinPaint { |
| MinikinPaint() : font(0), size(0), scaleX(0), skewX(0), letterSpacing(0), paintFlags(0), |
| fakery(), fontFeatureSettings() { } |
| |
| bool skipCache() const { |
| return !fontFeatureSettings.empty(); |
| } |
| |
| MinikinFont *font; |
| float size; |
| float scaleX; |
| float skewX; |
| float letterSpacing; |
| uint32_t paintFlags; |
| FontFakery fakery; |
| std::string fontFeatureSettings; |
| }; |
| |
| // Only a few flags affect layout, but those that do should have values |
| // consistent with Android's paint flags. |
| enum MinikinPaintFlags { |
| LinearTextFlag = 0x40, |
| }; |
| |
| struct MinikinRect { |
| float mLeft, mTop, mRight, mBottom; |
| bool isEmpty() const { |
| return mLeft == mRight || mTop == mBottom; |
| } |
| void set(const MinikinRect& r) { |
| mLeft = r.mLeft; |
| mTop = r.mTop; |
| mRight = r.mRight; |
| mBottom = r.mBottom; |
| } |
| void offset(float dx, float dy) { |
| mLeft += dx; |
| mTop += dy; |
| mRight += dx; |
| mBottom += dy; |
| } |
| void setEmpty() { |
| mLeft = mTop = mRight = mBottom = 0; |
| } |
| void join(const MinikinRect& r); |
| }; |
| |
| class MinikinFontFreeType; |
| |
| class MinikinFont : public MinikinRefCounted { |
| public: |
| virtual bool GetGlyph(uint32_t codepoint, uint32_t *glyph) const = 0; |
| |
| virtual float GetHorizontalAdvance(uint32_t glyph_id, |
| const MinikinPaint &paint) const = 0; |
| |
| virtual void GetBounds(MinikinRect* bounds, uint32_t glyph_id, |
| const MinikinPaint &paint) const = 0; |
| |
| // If buf is NULL, just update size |
| virtual bool GetTable(uint32_t tag, uint8_t *buf, size_t *size) = 0; |
| |
| virtual int32_t GetUniqueId() const = 0; |
| |
| static uint32_t MakeTag(char c1, char c2, char c3, char c4) { |
| return ((uint32_t)c1 << 24) | ((uint32_t)c2 << 16) | |
| ((uint32_t)c3 << 8) | (uint32_t)c4; |
| } |
| }; |
| |
| } // namespace android |
| |
| #endif // MINIKIN_FONT_H |