зеркало из https://github.com/mozilla/gecko-dev.git
113 строки
3.5 KiB
C++
113 строки
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "NativeFontResourceGDI.h"
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#include "Logging.h"
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#include "mozilla/RefPtr.h"
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#include "ScaledFontWin.h"
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#include "SFNTData.h"
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namespace mozilla {
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namespace gfx {
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/* static */
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already_AddRefed<NativeFontResourceGDI>
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NativeFontResourceGDI::Create(uint8_t *aFontData, uint32_t aDataLength,
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bool aNeedsCairo)
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{
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UniquePtr<SFNTData> sfntData = SFNTData::Create(aFontData, aDataLength);
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if (!sfntData) {
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gfxWarning() << "Failed to create SFNTData for ScaledFontWin.";
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return nullptr;
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}
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Vector<mozilla::u16string> fontNames;
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if (!sfntData->GetU16FullNames(fontNames)) {
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gfxWarning() << "Failed to get font names from font.";
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return nullptr;
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}
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// lfFaceName has a maximum length including null.
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for (size_t i = 0; i < fontNames.length(); ++i) {
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if (fontNames[i].size() > LF_FACESIZE - 1) {
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fontNames[i].resize(LF_FACESIZE - 1);
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}
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// Add null to end for easy copying later.
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fontNames[i].append(1, '\0');
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}
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DWORD numberOfFontsAdded;
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HANDLE fontResourceHandle = ::AddFontMemResourceEx(aFontData, aDataLength,
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0, &numberOfFontsAdded);
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if (!fontResourceHandle) {
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gfxWarning() << "Failed to add memory font resource.";
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return nullptr;
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}
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if (numberOfFontsAdded != fontNames.length()) {
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gfxWarning() <<
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"Number of fonts added doesn't match number of names extracted.";
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}
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RefPtr<NativeFontResourceGDI> fontResouce =
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new NativeFontResourceGDI(fontResourceHandle, Move(fontNames), aNeedsCairo);
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return fontResouce.forget();
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}
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NativeFontResourceGDI::~NativeFontResourceGDI()
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{
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::RemoveFontMemResourceEx(mFontResourceHandle);
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}
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already_AddRefed<ScaledFont>
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NativeFontResourceGDI::CreateScaledFont(uint32_t aIndex, uint32_t aGlyphSize)
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{
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if (aIndex >= mFontNames.length()) {
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gfxWarning() << "Font index is too high for font resource.";
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return nullptr;
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}
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if (mFontNames[aIndex].empty()) {
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gfxWarning() << "Font name for index is empty.";
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return nullptr;
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}
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LOGFONT logFont;
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logFont.lfHeight = 0;
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logFont.lfWidth = 0;
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logFont.lfEscapement = 0;
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logFont.lfOrientation = 0;
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logFont.lfWeight = FW_DONTCARE;
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logFont.lfItalic = FALSE;
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logFont.lfUnderline = FALSE;
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logFont.lfStrikeOut = FALSE;
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logFont.lfCharSet = DEFAULT_CHARSET;
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logFont.lfOutPrecision = OUT_DEFAULT_PRECIS;
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logFont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
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logFont.lfQuality = DEFAULT_QUALITY;
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logFont.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;
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// Copy name to mLogFont (null already included in font name). We cast here
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// because for VS2015 char16_t != wchar_t, even though they are both 16 bit.
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mFontNames[aIndex].copy(reinterpret_cast<char16_t*>(logFont.lfFaceName),
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mFontNames[aIndex].length());
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// Constructor for ScaledFontWin dereferences and copies the LOGFONT, so we
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// are safe to pass this reference.
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RefPtr<ScaledFontBase> scaledFont = new ScaledFontWin(&logFont, aGlyphSize);
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if (mNeedsCairo && !scaledFont->PopulateCairoScaledFont()) {
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gfxWarning() << "Unable to create cairo scaled font DWrite font.";
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return nullptr;
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}
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return scaledFont.forget();
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}
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} // gfx
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} // mozilla
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