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https://github.com/mozilla/gecko-dev.git
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1fe62dee68
We create and destroy ScaledFonts for every piece of text we write. That causes a huge amount of duplicated data within the recording. This splits out the recording of the font data itself from the ScaledFont. The key generated to determine uniqueness could probably be fairly easily faked, but for our purposes that doesn't matter.
113 lines
3.5 KiB
C++
113 lines
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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