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/*
* 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
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