forked from mia/Aegisub
b8f20dfe49
Freetype expects its IO to perform like mmap (i.e. seeking to be free), but the non-unix implementation uses fseek and fread. This implementation simply reads the entire file into a buffer, as fonts generally aren't very big. Cuts the time to recreate the fontconfig cache on my machine by about 60%.
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
// Copyright (c) 2014, Thomas Goyne <plorkyeran@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
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// Aegisub Project http://www.aegisub.org/
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// The non-unix version of ftsystem.c uses stdio functions, but freetype uses
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// streams as if they had mmap's performance characteristics (as it uses mmap
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// on unix), which results in mind-blowingly poor performance (35%+ of the
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// fontconfig caching runtime is spent on fseek).
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#include <ft2build.h>
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#include FT_INTERNAL_DEBUG_H
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#include FT_INTERNAL_STREAM_H
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#include FT_SYSTEM_H
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#include FT_ERRORS_H
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#include <codecvt>
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#include <fstream>
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extern "C" FT_Error FT_Stream_Open(FT_Stream stream, const char *filepathname) {
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if (!stream)
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return FT_THROW(Invalid_Stream_Handle);
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stream->descriptor.pointer = nullptr;
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stream->pathname.pointer = const_cast<char *>(filepathname);
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stream->base = nullptr;
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stream->pos = 0;
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stream->read = nullptr;
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stream->close = nullptr;
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std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> converter;
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std::ifstream file(converter.from_bytes(filepathname), std::ios::binary);
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if (!file.good())
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return FT_THROW(Cannot_Open_Resource);
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file.seekg(0, std::ios::end);
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stream->size = (unsigned long)file.tellg();
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if (!stream->size)
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return FT_THROW(Cannot_Open_Stream);
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file.seekg(0, std::ios::beg);
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stream->base = (unsigned char *)malloc(stream->size);
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file.read((char *)stream->base, stream->size);
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stream->close = [](FT_Stream stream) {
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free(stream->base);
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stream->size = 0;
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stream->base = nullptr;
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};
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return FT_Err_Ok;
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}
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extern "C" FT_Memory FT_New_Memory() {
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return new FT_MemoryRec_{
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nullptr,
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[](FT_Memory, long size) { return malloc(size); },
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[](FT_Memory, void *ptr) { free(ptr); },
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[](FT_Memory, long, long size, void *ptr) { return realloc(ptr, size); }};
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}
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extern "C" void FT_Done_Memory(FT_Memory memory) {
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delete memory;
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}
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