| /* |
| * 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. |
| */ |
| |
| // Implementation of MinikinFont abstraction specialized for FreeType |
| |
| #include <stdint.h> |
| |
| #include <ft2build.h> |
| #include FT_FREETYPE_H |
| #include FT_TRUETYPE_TABLES_H |
| #include FT_ADVANCES_H |
| |
| #include <minikin/MinikinFontFreeType.h> |
| |
| namespace android { |
| |
| int32_t MinikinFontFreeType::sIdCounter = 0; |
| |
| MinikinFontFreeType::MinikinFontFreeType(FT_Face typeface) : |
| mTypeface(typeface) { |
| mUniqueId = sIdCounter++; |
| } |
| |
| MinikinFontFreeType::~MinikinFontFreeType() { |
| FT_Done_Face(mTypeface); |
| } |
| |
| bool MinikinFontFreeType::GetGlyph(uint32_t codepoint, uint32_t *glyph) const { |
| FT_UInt glyph_index = FT_Get_Char_Index(mTypeface, codepoint); |
| *glyph = glyph_index; |
| return !!glyph_index; |
| } |
| |
| float MinikinFontFreeType::GetHorizontalAdvance(uint32_t glyph_id, |
| const MinikinPaint &paint) const { |
| FT_Set_Pixel_Sizes(mTypeface, 0, paint.size); |
| FT_UInt32 flags = FT_LOAD_DEFAULT; // TODO: respect hinting settings |
| FT_Fixed advance; |
| FT_Get_Advance(mTypeface, glyph_id, flags, &advance); |
| return advance * (1.0 / 65536); |
| } |
| |
| void MinikinFontFreeType::GetBounds(MinikinRect* bounds, uint32_t glyph_id, |
| const MinikinPaint& paint) const { |
| // TODO: NYI |
| } |
| |
| bool MinikinFontFreeType::GetTable(uint32_t tag, uint8_t *buf, size_t *size) { |
| FT_ULong ftsize = *size; |
| FT_Error error = FT_Load_Sfnt_Table(mTypeface, tag, 0, buf, &ftsize); |
| if (error != 0) { |
| return false; |
| } |
| *size = ftsize; |
| return true; |
| } |
| |
| int32_t MinikinFontFreeType::GetUniqueId() const { |
| return mUniqueId; |
| } |
| |
| bool MinikinFontFreeType::Render(uint32_t glyph_id, |
| const MinikinPaint &paint, GlyphBitmap *result) { |
| FT_Error error; |
| FT_Int32 load_flags = FT_LOAD_DEFAULT; // TODO: respect hinting settings |
| error = FT_Load_Glyph(mTypeface, glyph_id, load_flags); |
| if (error != 0) { |
| return false; |
| } |
| error = FT_Render_Glyph(mTypeface->glyph, FT_RENDER_MODE_NORMAL); |
| if (error != 0) { |
| return false; |
| } |
| FT_Bitmap &bitmap = mTypeface->glyph->bitmap; |
| result->buffer = bitmap.buffer; |
| result->width = bitmap.width; |
| result->height = bitmap.rows; |
| result->left = mTypeface->glyph->bitmap_left; |
| result->top = mTypeface->glyph->bitmap_top; |
| return true; |
| } |
| |
| MinikinFontFreeType* MinikinFontFreeType::GetFreeType() { |
| return this; |
| } |
| |
| } // namespace android |