635 lines
22 KiB
C++
635 lines
22 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 5 End-User License
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Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
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27th April 2017).
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End User License Agreement: www.juce.com/juce-5-licence
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Privacy Policy: www.juce.com/juce-5-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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/* This is some quick-and-dirty code to extract the typeface name from a lump of TTF file data.
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It's needed because although win32 will happily load a TTF file from in-memory data, it won't
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tell you the name of the damned font that it just loaded.. and in order to actually use the font,
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you need to know its name!! Anyway, this awful hack seems to work for most fonts.
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*/
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namespace TTFNameExtractor
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{
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struct OffsetTable
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{
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uint32 version;
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uint16 numTables, searchRange, entrySelector, rangeShift;
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};
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struct TableDirectory
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{
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char tag[4];
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uint32 checkSum, offset, length;
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};
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struct NamingTable
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{
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uint16 formatSelector;
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uint16 numberOfNameRecords;
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uint16 offsetStartOfStringStorage;
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};
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struct NameRecord
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{
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uint16 platformID, encodingID, languageID;
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uint16 nameID, stringLength, offsetFromStorageArea;
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};
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static String parseNameRecord (MemoryInputStream& input, const NameRecord& nameRecord,
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const int64 directoryOffset, const int64 offsetOfStringStorage)
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{
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String result;
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auto oldPos = input.getPosition();
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input.setPosition (directoryOffset + offsetOfStringStorage + ByteOrder::swapIfLittleEndian (nameRecord.offsetFromStorageArea));
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auto stringLength = (int) ByteOrder::swapIfLittleEndian (nameRecord.stringLength);
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auto platformID = ByteOrder::swapIfLittleEndian (nameRecord.platformID);
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if (platformID == 0 || platformID == 3)
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{
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auto numChars = stringLength / 2 + 1;
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HeapBlock<uint16> buffer;
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buffer.calloc (numChars + 1);
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input.read (buffer, stringLength);
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for (int i = 0; i < numChars; ++i)
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buffer[i] = ByteOrder::swapIfLittleEndian (buffer[i]);
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static_assert (sizeof (CharPointer_UTF16::CharType) == sizeof (uint16), "Sanity check UTF-16 type");
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result = CharPointer_UTF16 ((CharPointer_UTF16::CharType*) buffer.getData());
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}
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else
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{
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HeapBlock<char> buffer;
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buffer.calloc (stringLength + 1);
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input.read (buffer, stringLength);
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result = CharPointer_UTF8 (buffer.getData());
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}
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input.setPosition (oldPos);
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return result;
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}
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static String parseNameTable (MemoryInputStream& input, int64 directoryOffset)
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{
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input.setPosition (directoryOffset);
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NamingTable namingTable = { 0 };
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input.read (&namingTable, sizeof (namingTable));
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for (int i = 0; i < (int) ByteOrder::swapIfLittleEndian (namingTable.numberOfNameRecords); ++i)
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{
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NameRecord nameRecord = { 0 };
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input.read (&nameRecord, sizeof (nameRecord));
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if (ByteOrder::swapIfLittleEndian (nameRecord.nameID) == 4)
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{
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const String result (parseNameRecord (input, nameRecord, directoryOffset,
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ByteOrder::swapIfLittleEndian (namingTable.offsetStartOfStringStorage)));
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if (result.isNotEmpty())
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return result;
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}
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}
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return {};
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}
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static String getTypefaceNameFromFile (MemoryInputStream& input)
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{
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OffsetTable offsetTable = { 0 };
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input.read (&offsetTable, sizeof (offsetTable));
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for (int i = 0; i < (int) ByteOrder::swapIfLittleEndian (offsetTable.numTables); ++i)
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{
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TableDirectory tableDirectory;
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zerostruct (tableDirectory);
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input.read (&tableDirectory, sizeof (tableDirectory));
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if (String (tableDirectory.tag, sizeof (tableDirectory.tag)).equalsIgnoreCase ("name"))
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return parseNameTable (input, ByteOrder::swapIfLittleEndian (tableDirectory.offset));
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}
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return {};
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}
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}
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namespace FontEnumerators
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{
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static int CALLBACK fontEnum2 (ENUMLOGFONTEXW* lpelfe, NEWTEXTMETRICEXW*, int type, LPARAM lParam)
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{
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if (lpelfe != nullptr && (type & RASTER_FONTTYPE) == 0)
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{
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const String fontName (lpelfe->elfLogFont.lfFaceName);
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((StringArray*) lParam)->addIfNotAlreadyThere (fontName.removeCharacters ("@"));
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}
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return 1;
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}
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static int CALLBACK fontEnum1 (ENUMLOGFONTEXW* lpelfe, NEWTEXTMETRICEXW*, int type, LPARAM lParam)
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{
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if (lpelfe != nullptr && (type & RASTER_FONTTYPE) == 0)
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{
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LOGFONTW lf = { 0 };
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lf.lfWeight = FW_DONTCARE;
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lf.lfOutPrecision = OUT_OUTLINE_PRECIS;
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lf.lfQuality = DEFAULT_QUALITY;
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lf.lfCharSet = DEFAULT_CHARSET;
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lf.lfClipPrecision = CLIP_DEFAULT_PRECIS;
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lf.lfPitchAndFamily = FF_DONTCARE;
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const String fontName (lpelfe->elfLogFont.lfFaceName);
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fontName.copyToUTF16 (lf.lfFaceName, sizeof (lf.lfFaceName));
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auto dc = CreateCompatibleDC (0);
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EnumFontFamiliesEx (dc, &lf, (FONTENUMPROCW) &fontEnum2, lParam, 0);
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DeleteDC (dc);
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}
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return 1;
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}
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}
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StringArray Font::findAllTypefaceNames()
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{
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StringArray results;
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#if JUCE_USE_DIRECTWRITE
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SharedResourcePointer<Direct2DFactories> factories;
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if (factories->systemFonts != nullptr)
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{
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ComSmartPtr<IDWriteFontFamily> fontFamily;
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uint32 fontFamilyCount = 0;
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fontFamilyCount = factories->systemFonts->GetFontFamilyCount();
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for (uint32 i = 0; i < fontFamilyCount; ++i)
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{
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auto hr = factories->systemFonts->GetFontFamily (i, fontFamily.resetAndGetPointerAddress());
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if (SUCCEEDED (hr))
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results.addIfNotAlreadyThere (getFontFamilyName (fontFamily));
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}
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}
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else
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#endif
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{
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auto dc = CreateCompatibleDC (0);
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{
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LOGFONTW lf = { 0 };
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lf.lfWeight = FW_DONTCARE;
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lf.lfOutPrecision = OUT_OUTLINE_PRECIS;
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lf.lfQuality = DEFAULT_QUALITY;
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lf.lfCharSet = DEFAULT_CHARSET;
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lf.lfClipPrecision = CLIP_DEFAULT_PRECIS;
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lf.lfPitchAndFamily = FF_DONTCARE;
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EnumFontFamiliesEx (dc, &lf,
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(FONTENUMPROCW) &FontEnumerators::fontEnum1,
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(LPARAM) &results, 0);
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}
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DeleteDC (dc);
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}
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results.sort (true);
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return results;
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}
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StringArray Font::findAllTypefaceStyles (const String& family)
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{
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if (FontStyleHelpers::isPlaceholderFamilyName (family))
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return findAllTypefaceStyles (FontStyleHelpers::getConcreteFamilyNameFromPlaceholder (family));
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StringArray results;
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#if JUCE_USE_DIRECTWRITE
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SharedResourcePointer<Direct2DFactories> factories;
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if (factories->systemFonts != nullptr)
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{
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BOOL fontFound = false;
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uint32 fontIndex = 0;
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auto hr = factories->systemFonts->FindFamilyName (family.toWideCharPointer(), &fontIndex, &fontFound);
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if (! fontFound)
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fontIndex = 0;
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// Get the font family using the search results
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// Fonts like: Times New Roman, Times New Roman Bold, Times New Roman Italic are all in the same font family
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ComSmartPtr<IDWriteFontFamily> fontFamily;
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hr = factories->systemFonts->GetFontFamily (fontIndex, fontFamily.resetAndGetPointerAddress());
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// Get the font faces
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ComSmartPtr<IDWriteFont> dwFont;
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uint32 fontFacesCount = 0;
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fontFacesCount = fontFamily->GetFontCount();
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for (uint32 i = 0; i < fontFacesCount; ++i)
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{
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hr = fontFamily->GetFont (i, dwFont.resetAndGetPointerAddress());
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// Ignore any algorithmically generated bold and oblique styles..
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if (dwFont->GetSimulations() == DWRITE_FONT_SIMULATIONS_NONE)
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results.addIfNotAlreadyThere (getFontFaceName (dwFont));
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}
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}
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else
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#endif
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{
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results.add ("Regular");
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results.add ("Italic");
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results.add ("Bold");
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results.add ("Bold Italic");
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}
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return results;
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}
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extern bool juce_isRunningInWine();
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struct DefaultFontNames
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{
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DefaultFontNames()
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{
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if (juce_isRunningInWine())
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{
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// If we're running in Wine, then use fonts that might be available on Linux..
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defaultSans = "Bitstream Vera Sans";
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defaultSerif = "Bitstream Vera Serif";
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defaultFixed = "Bitstream Vera Sans Mono";
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}
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else
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{
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defaultSans = "Verdana";
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defaultSerif = "Times New Roman";
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defaultFixed = "Lucida Console";
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defaultFallback = "Tahoma"; // (contains plenty of unicode characters)
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}
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}
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String defaultSans, defaultSerif, defaultFixed, defaultFallback;
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};
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Typeface::Ptr Font::getDefaultTypefaceForFont (const Font& font)
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{
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static DefaultFontNames defaultNames;
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Font newFont (font);
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auto& faceName = font.getTypefaceName();
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if (faceName == getDefaultSansSerifFontName()) newFont.setTypefaceName (defaultNames.defaultSans);
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else if (faceName == getDefaultSerifFontName()) newFont.setTypefaceName (defaultNames.defaultSerif);
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else if (faceName == getDefaultMonospacedFontName()) newFont.setTypefaceName (defaultNames.defaultFixed);
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if (font.getTypefaceStyle() == getDefaultStyle())
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newFont.setTypefaceStyle ("Regular");
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return Typeface::createSystemTypefaceFor (newFont);
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}
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//==============================================================================
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class WindowsTypeface : public Typeface
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{
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public:
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WindowsTypeface (const Font& font) : Typeface (font.getTypefaceName(),
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font.getTypefaceStyle())
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{
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loadFont();
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}
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WindowsTypeface (const void* data, size_t dataSize)
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: Typeface (String(), String())
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{
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DWORD numInstalled = 0;
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memoryFont = AddFontMemResourceEx (const_cast<void*> (data), (DWORD) dataSize,
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nullptr, &numInstalled);
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MemoryInputStream m (data, dataSize, false);
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name = TTFNameExtractor::getTypefaceNameFromFile (m);
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loadFont();
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}
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~WindowsTypeface()
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{
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SelectObject (dc, previousFontH); // Replacing the previous font before deleting the DC avoids a warning in BoundsChecker
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DeleteDC (dc);
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if (fontH != 0)
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DeleteObject (fontH);
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if (memoryFont != 0)
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RemoveFontMemResourceEx (memoryFont);
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}
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float getAscent() const { return ascent; }
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float getDescent() const { return 1.0f - ascent; }
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float getHeightToPointsFactor() const { return heightToPointsFactor; }
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float getStringWidth (const String& text)
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{
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auto utf16 = text.toUTF16();
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auto numChars = utf16.length();
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HeapBlock<uint16> results (numChars);
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float x = 0;
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if (GetGlyphIndices (dc, utf16, (int) numChars, reinterpret_cast<WORD*> (results.getData()),
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GGI_MARK_NONEXISTING_GLYPHS) != GDI_ERROR)
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{
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for (size_t i = 0; i < numChars; ++i)
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x += getKerning (dc, results[i], (i + 1) < numChars ? results[i + 1] : -1);
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}
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return x;
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}
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void getGlyphPositions (const String& text, Array<int>& resultGlyphs, Array<float>& xOffsets)
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{
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auto utf16 = text.toUTF16();
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auto numChars = utf16.length();
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HeapBlock<uint16> results (numChars);
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float x = 0;
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if (GetGlyphIndices (dc, utf16, (int) numChars, reinterpret_cast<WORD*> (results.getData()),
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GGI_MARK_NONEXISTING_GLYPHS) != GDI_ERROR)
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{
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resultGlyphs.ensureStorageAllocated ((int) numChars);
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xOffsets.ensureStorageAllocated ((int) numChars + 1);
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for (size_t i = 0; i < numChars; ++i)
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{
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resultGlyphs.add (results[i]);
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xOffsets.add (x);
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x += getKerning (dc, results[i], (i + 1) < numChars ? results[i + 1] : -1);
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}
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}
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xOffsets.add (x);
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}
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bool getOutlineForGlyph (int glyphNumber, Path& glyphPath)
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{
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if (glyphNumber < 0)
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glyphNumber = defaultGlyph;
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GLYPHMETRICS gm;
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// (although GetGlyphOutline returns a DWORD, it may be -1 on failure, so treat it as signed int..)
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auto bufSize = (int) GetGlyphOutline (dc, (UINT) glyphNumber, GGO_NATIVE | GGO_GLYPH_INDEX,
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&gm, 0, 0, &identityMatrix);
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if (bufSize > 0)
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{
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HeapBlock<char> data (bufSize);
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GetGlyphOutline (dc, (UINT) glyphNumber, GGO_NATIVE | GGO_GLYPH_INDEX, &gm,
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bufSize, data, &identityMatrix);
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auto pheader = reinterpret_cast<const TTPOLYGONHEADER*> (data.getData());
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auto scaleX = 1.0f / tm.tmHeight;
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auto scaleY = -scaleX;
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while ((char*) pheader < data + bufSize)
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{
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glyphPath.startNewSubPath (scaleX * pheader->pfxStart.x.value,
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scaleY * pheader->pfxStart.y.value);
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auto curve = (const TTPOLYCURVE*) ((const char*) pheader + sizeof (TTPOLYGONHEADER));
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auto curveEnd = ((const char*) pheader) + pheader->cb;
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while ((const char*) curve < curveEnd)
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{
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if (curve->wType == TT_PRIM_LINE)
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{
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for (int i = 0; i < curve->cpfx; ++i)
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glyphPath.lineTo (scaleX * curve->apfx[i].x.value,
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scaleY * curve->apfx[i].y.value);
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}
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else if (curve->wType == TT_PRIM_QSPLINE)
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{
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for (int i = 0; i < curve->cpfx - 1; ++i)
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{
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auto x2 = scaleX * curve->apfx[i].x.value;
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auto y2 = scaleY * curve->apfx[i].y.value;
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auto x3 = scaleX * curve->apfx[i + 1].x.value;
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auto y3 = scaleY * curve->apfx[i + 1].y.value;
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if (i < curve->cpfx - 2)
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{
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x3 = 0.5f * (x2 + x3);
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y3 = 0.5f * (y2 + y3);
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}
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glyphPath.quadraticTo (x2, y2, x3, y3);
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}
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}
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curve = (const TTPOLYCURVE*) &(curve->apfx [curve->cpfx]);
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}
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pheader = (const TTPOLYGONHEADER*) curve;
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glyphPath.closeSubPath();
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}
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}
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return true;
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}
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private:
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static const MAT2 identityMatrix;
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HFONT fontH = {};
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HGDIOBJ previousFontH = {};
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HDC dc { CreateCompatibleDC (0) };
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TEXTMETRIC tm;
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HANDLE memoryFont = {};
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float ascent = 1.0f, heightToPointsFactor = 1.0f;
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int defaultGlyph = -1, heightInPoints = 0;
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std::unordered_map<uint64, float> kerningPairs;
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static uint64 kerningPairIndex (int glyph1, int glyph2)
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{
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return (((uint64) (uint32) glyph1) << 32) | (uint64) (uint32) glyph2;
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}
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void loadFont()
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{
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SetMapperFlags (dc, 0);
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SetMapMode (dc, MM_TEXT);
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LOGFONTW lf = { 0 };
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lf.lfCharSet = DEFAULT_CHARSET;
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lf.lfClipPrecision = CLIP_DEFAULT_PRECIS;
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lf.lfOutPrecision = OUT_OUTLINE_PRECIS;
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lf.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;
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lf.lfQuality = PROOF_QUALITY;
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lf.lfItalic = (BYTE) (style.contains ("Italic") ? TRUE : FALSE);
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lf.lfWeight = style.contains ("Bold") ? FW_BOLD : FW_NORMAL;
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lf.lfHeight = -256;
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name.copyToUTF16 (lf.lfFaceName, sizeof (lf.lfFaceName));
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auto standardSizedFont = CreateFontIndirect (&lf);
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if (standardSizedFont != 0)
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{
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if ((previousFontH = SelectObject (dc, standardSizedFont)) != 0)
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{
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fontH = standardSizedFont;
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OUTLINETEXTMETRIC otm;
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if (GetOutlineTextMetrics (dc, sizeof (otm), &otm) != 0)
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{
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heightInPoints = otm.otmEMSquare;
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lf.lfHeight = -(int) heightInPoints;
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fontH = CreateFontIndirect (&lf);
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SelectObject (dc, fontH);
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DeleteObject (standardSizedFont);
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}
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}
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}
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if (GetTextMetrics (dc, &tm))
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{
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auto dpi = (GetDeviceCaps (dc, LOGPIXELSX) + GetDeviceCaps (dc, LOGPIXELSY)) / 2.0f;
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heightToPointsFactor = (dpi / GetDeviceCaps (dc, LOGPIXELSY)) * heightInPoints / (float) tm.tmHeight;
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ascent = tm.tmAscent / (float) tm.tmHeight;
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|
std::unordered_map<int, int> glyphsForChars;
|
|
defaultGlyph = getGlyphForChar (dc, glyphsForChars, tm.tmDefaultChar);
|
|
createKerningPairs (dc, glyphsForChars, (float) tm.tmHeight);
|
|
}
|
|
}
|
|
|
|
void createKerningPairs (HDC hdc, std::unordered_map<int, int>& glyphsForChars, float height)
|
|
{
|
|
HeapBlock<KERNINGPAIR> rawKerning;
|
|
auto numKPs = GetKerningPairs (hdc, 0, 0);
|
|
rawKerning.calloc (numKPs);
|
|
GetKerningPairs (hdc, numKPs, rawKerning);
|
|
|
|
std::unordered_map<int, int> widthsForGlyphs;
|
|
|
|
for (DWORD i = 0; i < numKPs; ++i)
|
|
{
|
|
auto glyph1 = getGlyphForChar (hdc, glyphsForChars, rawKerning[i].wFirst);
|
|
auto glyph2 = getGlyphForChar (hdc, glyphsForChars, rawKerning[i].wSecond);
|
|
auto standardWidth = getGlyphWidth (hdc, widthsForGlyphs, glyph1);
|
|
|
|
kerningPairs[kerningPairIndex (glyph1, glyph2)] = (standardWidth + rawKerning[i].iKernAmount) / height;
|
|
kerningPairs[kerningPairIndex (glyph1, -1)] = standardWidth / height;
|
|
}
|
|
}
|
|
|
|
static int getGlyphForChar (HDC dc, std::unordered_map<int, int>& cache, juce_wchar character)
|
|
{
|
|
auto existing = cache.find ((int) character);
|
|
|
|
if (existing != cache.end())
|
|
return existing->second;
|
|
|
|
const WCHAR charToTest[] = { (WCHAR) character, 0 };
|
|
WORD index = 0;
|
|
|
|
if (GetGlyphIndices (dc, charToTest, 1, &index, GGI_MARK_NONEXISTING_GLYPHS) == GDI_ERROR
|
|
|| index == 0xffff)
|
|
return -1;
|
|
|
|
cache[(int) character] = index;
|
|
return index;
|
|
}
|
|
|
|
static int getGlyphWidth (HDC dc, std::unordered_map<int, int>& cache, int glyphNumber)
|
|
{
|
|
auto existing = cache.find (glyphNumber);
|
|
|
|
if (existing != cache.end())
|
|
return existing->second;
|
|
|
|
auto width = getGlyphWidth (dc, glyphNumber);
|
|
cache[glyphNumber] = width;
|
|
return width;
|
|
}
|
|
|
|
static int getGlyphWidth (HDC dc, int glyphNumber)
|
|
{
|
|
GLYPHMETRICS gm;
|
|
gm.gmCellIncX = 0;
|
|
GetGlyphOutline (dc, (UINT) glyphNumber, GGO_NATIVE | GGO_GLYPH_INDEX, &gm, 0, 0, &identityMatrix);
|
|
return gm.gmCellIncX;
|
|
}
|
|
|
|
float getKerning (HDC hdc, int glyph1, int glyph2)
|
|
{
|
|
auto pair = kerningPairs.find (kerningPairIndex (glyph1, glyph2));
|
|
|
|
if (pair != kerningPairs.end())
|
|
return pair->second;
|
|
|
|
auto single = kerningPairs.find (kerningPairIndex (glyph1, -1));
|
|
|
|
if (single != kerningPairs.end())
|
|
return single->second;
|
|
|
|
auto width = getGlyphWidth (hdc, glyph1) / (float) tm.tmHeight;
|
|
kerningPairs[kerningPairIndex (glyph1, -1)] = width;
|
|
return width;
|
|
}
|
|
|
|
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (WindowsTypeface)
|
|
};
|
|
|
|
const MAT2 WindowsTypeface::identityMatrix = { { 0, 1 }, { 0, 0 }, { 0, 0 }, { 0, 1 } };
|
|
|
|
Typeface::Ptr Typeface::createSystemTypefaceFor (const Font& font)
|
|
{
|
|
#if JUCE_USE_DIRECTWRITE
|
|
SharedResourcePointer<Direct2DFactories> factories;
|
|
|
|
if (factories->systemFonts != nullptr)
|
|
{
|
|
std::unique_ptr<WindowsDirectWriteTypeface> wtf (new WindowsDirectWriteTypeface (font, factories->systemFonts));
|
|
|
|
if (wtf->loadedOk())
|
|
return wtf.release();
|
|
}
|
|
#endif
|
|
|
|
return new WindowsTypeface (font);
|
|
}
|
|
|
|
Typeface::Ptr Typeface::createSystemTypefaceFor (const void* data, size_t dataSize)
|
|
{
|
|
return new WindowsTypeface (data, dataSize);
|
|
}
|
|
|
|
void Typeface::scanFolderForFonts (const File&)
|
|
{
|
|
jassertfalse; // not implemented on this platform
|
|
}
|
|
|
|
} // namespace juce
|