gecko-dev/gfx/2d/NativeFontResourceGDI.cpp

114 lines
3.6 KiB
C++

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