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/*
* Copyright 2011 Google Inc. All Rights Reserved.
*
* 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.
*/
#include "gtest/gtest.h"
#include "sfntly/font.h"
#include "sfntly/port/file_input_stream.h"
#include "sfntly/port/memory_input_stream.h"
#include "sfntly/port/memory_output_stream.h"
#include "sfntly/table/bitmap/ebdt_table.h"
#include "sfntly/table/bitmap/eblc_table.h"
#include "sfntly/table/bitmap/index_sub_table_format3.h"
#include "sfntly/table/bitmap/index_sub_table_format4.h"
#include "test/test_data.h"
#include "test/test_font_utils.h"
namespace sfntly {
const int32_t NUM_STRIKES = 4;
const int32_t STRIKE1_ARRAY_OFFSET = 0xc8;
const int32_t STRIKE1_INDEX_TABLE_SIZE = 0x4f4;
const int32_t STRIKE1_NUM_INDEX_TABLES = 1;
const int32_t STRIKE1_COLOR_REF = 0;
const int32_t STRIKE1_START_GLYPH_INDEX = 0;
const int32_t STRIKE1_END_GLYPH_INDEX = 623;
const int32_t STRIKE1_PPEM_X = 10;
const int32_t STRIKE1_PPEM_Y = 10;
const int32_t STRIKE1_BIT_DEPTH = 1;
const int32_t STRIKE1_FLAGS = 0x01;
const int32_t STRIKE4_SUB1_INDEX_FORMAT = 3;
const int32_t STRIKE4_SUB1_IMAGE_FORMAT = 1;
const int32_t STRIKE4_SUB1_IMAGE_DATA_OFFSET = 0x00005893;
const int32_t STRIKE4_SUB1_GLYPH_OFFSET[] = {
0x00005893, 0x00005898, 0x0000589d, 0x000058a2, 0x000058a7,
0x000058b2, 0x000058c2, 0x000058d0, 0x000058de, 0x000058e6 };
const int32_t NUM_STRIKE4_SUB1_GLYPH_OFFSET = 10;
const int32_t STRIKE4_SUB1_GLYPH2_LENGTH = 0x58a2 - 0x589d;
bool CommonReadingTest(Font* raw_font) {
FontPtr font = raw_font;
EblcTablePtr bitmap_loca = down_cast<EblcTable*>(font->GetTable(Tag::EBLC));
EbdtTablePtr bitmap_table = down_cast<EbdtTable*>(font->GetTable(Tag::EBDT));
EXPECT_FALSE(bitmap_loca == NULL);
EXPECT_FALSE(bitmap_table == NULL);
EXPECT_EQ(bitmap_loca->NumSizes(), NUM_STRIKES);
// Strike 1
BitmapSizeTablePtr strike1 = bitmap_loca->GetBitmapSizeTable(0);
EXPECT_FALSE(strike1 == NULL);
EXPECT_EQ(strike1->IndexSubTableArrayOffset(), STRIKE1_ARRAY_OFFSET);
EXPECT_EQ(strike1->NumberOfIndexSubTables(), STRIKE1_NUM_INDEX_TABLES);
EXPECT_EQ(strike1->ColorRef(), STRIKE1_COLOR_REF);
EXPECT_EQ(strike1->StartGlyphIndex(), STRIKE1_START_GLYPH_INDEX);
EXPECT_EQ(strike1->EndGlyphIndex(), STRIKE1_END_GLYPH_INDEX);
EXPECT_EQ(strike1->PpemX(), STRIKE1_PPEM_X);
EXPECT_EQ(strike1->PpemY(), STRIKE1_PPEM_Y);
EXPECT_EQ(strike1->BitDepth(), STRIKE1_BIT_DEPTH);
EXPECT_EQ(strike1->FlagsAsInt(), STRIKE1_FLAGS);
// Strike 4
// In this test font, all strikes and all subtables have same glyphs.
BitmapSizeTablePtr strike4 = bitmap_loca->GetBitmapSizeTable(3);
EXPECT_FALSE(strike4 == NULL);
EXPECT_EQ(strike4->StartGlyphIndex(), STRIKE1_START_GLYPH_INDEX);
EXPECT_EQ(strike4->EndGlyphIndex(), STRIKE1_END_GLYPH_INDEX);
IndexSubTablePtr sub1 = strike4->GetIndexSubTable(0);
EXPECT_FALSE(sub1 == NULL);
EXPECT_EQ(sub1->image_format(), STRIKE4_SUB1_IMAGE_FORMAT);
EXPECT_EQ(sub1->first_glyph_index(), STRIKE1_START_GLYPH_INDEX);
EXPECT_EQ(sub1->last_glyph_index(), STRIKE1_END_GLYPH_INDEX);
EXPECT_EQ(sub1->image_data_offset(), STRIKE4_SUB1_IMAGE_DATA_OFFSET);
for (int32_t i = 0; i < NUM_STRIKE4_SUB1_GLYPH_OFFSET; ++i) {
EXPECT_EQ(sub1->GlyphOffset(i), STRIKE4_SUB1_GLYPH_OFFSET[i]);
}
return true;
}
bool TestReadingBitmapTable() {
FontFactoryPtr factory;
factory.Attach(FontFactory::GetInstance());
FontArray font_array;
LoadFont(SAMPLE_BITMAP_FONT, factory, &font_array);
FontPtr font = font_array[0];
EXPECT_TRUE(CommonReadingTest(font));
EblcTablePtr bitmap_loca = down_cast<EblcTable*>(font->GetTable(Tag::EBLC));
BitmapSizeTablePtr strike1 = bitmap_loca->GetBitmapSizeTable(0);
BitmapSizeTablePtr strike4 = bitmap_loca->GetBitmapSizeTable(3);
IndexSubTablePtr sub1 = strike4->GetIndexSubTable(0);
EXPECT_EQ(strike1->IndexTableSize(), STRIKE1_INDEX_TABLE_SIZE);
EXPECT_EQ(sub1->index_format(), STRIKE4_SUB1_INDEX_FORMAT);
// Strike 4 Index Sub Table 1 is a Format 3
IndexSubTableFormat3Ptr sub3 =
down_cast<IndexSubTableFormat3*>(strike4->GetIndexSubTable(0));
EXPECT_FALSE(sub3 == NULL);
BitmapGlyphInfoPtr info;
info.Attach(sub3->GlyphInfo(2));
EXPECT_EQ(info->glyph_id(), 2);
EXPECT_EQ(info->block_offset(), STRIKE4_SUB1_IMAGE_DATA_OFFSET);
EXPECT_EQ(info->start_offset(),
STRIKE4_SUB1_GLYPH_OFFSET[2] - STRIKE4_SUB1_GLYPH_OFFSET[0]);
EXPECT_EQ(info->format(), STRIKE4_SUB1_IMAGE_FORMAT);
EXPECT_EQ(info->length(), STRIKE4_SUB1_GLYPH2_LENGTH);
return true;
}
// Function in subset_impl.cc
extern
void SubsetEBLC(EblcTable::Builder* eblc, const BitmapLocaList& new_loca);
bool TestIndexFormatConversion() {
FontFactoryPtr factory;
factory.Attach(FontFactory::GetInstance());
FontBuilderArray builder_array;
BuilderForFontFile(SAMPLE_BITMAP_FONT, factory, &builder_array);
FontBuilderPtr font_builder;
font_builder = builder_array[0];
EblcTableBuilderPtr eblc_builder =
down_cast<EblcTable::Builder*>(font_builder->GetTableBuilder(Tag::EBLC));
BitmapLocaList new_loca;
eblc_builder->GenerateLocaList(&new_loca);
SubsetEBLC(eblc_builder, new_loca); // Format 3 -> 4
FontPtr new_font;
new_font.Attach(font_builder->Build());
// Serialize and reload the serialized font.
MemoryOutputStream os;
factory->SerializeFont(new_font, &os);
#if defined (SFNTLY_DEBUG_BITMAP)
SerializeToFile(&os, "anon-mod.ttf");
#endif
MemoryInputStream is;
is.Attach(os.Get(), os.Size());
FontArray font_array;
factory->LoadFonts(&is, &font_array);
new_font = font_array[0];
EXPECT_TRUE(CommonReadingTest(new_font));
// Strike 4 Index Sub Table 1 is a Format 4
EblcTablePtr bitmap_loca =
down_cast<EblcTable*>(new_font->GetTable(Tag::EBLC));
BitmapSizeTablePtr strike4 = bitmap_loca->GetBitmapSizeTable(3);
IndexSubTableFormat4Ptr sub4 =
down_cast<IndexSubTableFormat4*>(strike4->GetIndexSubTable(0));
EXPECT_FALSE(sub4 == NULL);
// And this subtable shall have exactly the same offset as original table
// since no subsetting happens.
FontArray original_font_array;
LoadFont(SAMPLE_BITMAP_FONT, factory, &original_font_array);
FontPtr font = original_font_array[0];
EXPECT_FALSE(font == NULL);
EblcTablePtr original_loca = down_cast<EblcTable*>(font->GetTable(Tag::EBLC));
EXPECT_FALSE(original_loca == NULL);
BitmapSizeTablePtr original_strike4 = bitmap_loca->GetBitmapSizeTable(3);
EXPECT_FALSE(original_strike4 == NULL);
IndexSubTableFormat3Ptr sub3 =
down_cast<IndexSubTableFormat3*>(strike4->GetIndexSubTable(0));
EXPECT_FALSE(sub3 == NULL);
EXPECT_EQ(strike4->StartGlyphIndex(), original_strike4->StartGlyphIndex());
EXPECT_EQ(strike4->EndGlyphIndex(), original_strike4->EndGlyphIndex());
for (int32_t i = strike4->StartGlyphIndex();
i <= strike4->EndGlyphIndex(); ++i) {
BitmapGlyphInfoPtr info, original_info;
info.Attach(sub4->GlyphInfo(i));
original_info.Attach(sub3->GlyphInfo(i));
EXPECT_EQ(info->format(), original_info->format());
EXPECT_EQ(info->glyph_id(), original_info->glyph_id());
EXPECT_EQ(info->length(), original_info->length());
EXPECT_EQ(info->offset(), original_info->offset());
}
return true;
}
} // namespace sfntly
TEST(BitmapTable, Reading) {
ASSERT_TRUE(sfntly::TestReadingBitmapTable());
}
TEST(BitmapTable, IndexFormatConversion) {
ASSERT_TRUE(sfntly::TestIndexFormatConversion());
}
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