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      1 /*
      2  * Copyright 2011 Google Inc. All Rights Reserved.
      3  *
      4  * Licensed under the Apache License, Version 2.0  = the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "sfntly/table/bitmap/composite_bitmap_glyph.h"
     18 
     19 namespace sfntly {
     20 /******************************************************************************
     21  * CompositeBitmapGlyph class
     22  ******************************************************************************/
     23 CompositeBitmapGlyph::CompositeBitmapGlyph(ReadableFontData* data,
     24                                            int32_t format)
     25     : BitmapGlyph(data, format) {
     26   Initialize(format);
     27 }
     28 
     29 CompositeBitmapGlyph::~CompositeBitmapGlyph() {
     30 }
     31 
     32 int32_t CompositeBitmapGlyph::NumComponents() {
     33   return data_->ReadUShort(num_components_offset_);
     34 }
     35 
     36 CompositeBitmapGlyph::Component CompositeBitmapGlyph::GetComponent(
     37     int32_t component_num) const {
     38   int32_t component_offset = component_array_offset_ +
     39                              component_num * Offset::kEbdtComponentLength;
     40   return CompositeBitmapGlyph::Component(
     41       data_->ReadUShort(component_offset + Offset::kEbdtComponent_glyphCode),
     42       data_->ReadChar(component_offset + Offset::kEbdtComponent_xOffset),
     43       data_->ReadChar(component_offset + Offset::kEbdtComponent_yOffset));
     44 }
     45 
     46 void CompositeBitmapGlyph::Initialize(int32_t format) {
     47   if (format == 8) {
     48     num_components_offset_ = Offset::kGlyphFormat8_numComponents;
     49     component_array_offset_ = Offset::kGlyphFormat8_componentArray;
     50   } else if (format == 9) {
     51     num_components_offset_ = Offset::kGlyphFormat9_numComponents;
     52     component_array_offset_ = Offset::kGlyphFormat9_componentArray;
     53   } else {
     54 #if !defined (SFNTLY_NO_EXCEPTION)
     55     throw IllegalStateException("Attempt to create a Composite Bitmap Glyph "
     56                                 "with a non-composite format.");
     57 #endif
     58   }
     59 }
     60 
     61 /******************************************************************************
     62  * CompositeBitmapGlyph::Component class
     63  ******************************************************************************/
     64 CompositeBitmapGlyph::Component::Component(const Component& rhs)
     65     : glyph_code_(rhs.glyph_code_),
     66       x_offset_(rhs.x_offset_),
     67       y_offset_(rhs.y_offset_) {
     68 }
     69 
     70 bool CompositeBitmapGlyph::Component::operator==(
     71     const CompositeBitmapGlyph::Component& rhs) {
     72   return glyph_code_ == rhs.glyph_code_;
     73 }
     74 
     75 CompositeBitmapGlyph::Component& CompositeBitmapGlyph::Component::operator=(
     76     const CompositeBitmapGlyph::Component& rhs) {
     77   glyph_code_ = rhs.glyph_code_;
     78   x_offset_ = rhs.x_offset_;
     79   y_offset_ = rhs.y_offset_;
     80   return *this;
     81 }
     82 
     83 CompositeBitmapGlyph::Component::Component(int32_t glyph_code,
     84                                            int32_t x_offset,
     85                                            int32_t y_offset)
     86     : glyph_code_(glyph_code), x_offset_(x_offset), y_offset_(y_offset) {
     87 }
     88 
     89 /******************************************************************************
     90  * CompositeBitmapGlyph::Builder class
     91  ******************************************************************************/
     92 CompositeBitmapGlyph::Builder::Builder(ReadableFontData* data, int32_t format)
     93     : BitmapGlyph::Builder(data, format) {
     94 }
     95 
     96 CompositeBitmapGlyph::Builder::Builder(WritableFontData* data, int32_t format)
     97     : BitmapGlyph::Builder(data, format) {
     98 }
     99 
    100 CompositeBitmapGlyph::Builder::~Builder() {
    101 }
    102 
    103 CALLER_ATTACH FontDataTable*
    104 CompositeBitmapGlyph::Builder::SubBuildTable(ReadableFontData* data) {
    105   Ptr<CompositeBitmapGlyph> glyph = new CompositeBitmapGlyph(data, format());
    106   return glyph.Detach();
    107 }
    108 
    109 }  // namespace sfntly
    110