63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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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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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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RefPtr<NativeFontResourceGDI> fontResouce =
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new NativeFontResourceGDI(fontResourceHandle, 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, Float aGlyphSize,
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const uint8_t* aInstanceData, uint32_t aInstanceDataLength)
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{
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if (aInstanceDataLength < sizeof(LOGFONT)) {
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gfxWarning() << "GDI scaled font instance data is truncated.";
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return nullptr;
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}
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const LOGFONT* logFont = reinterpret_cast<const LOGFONT*>(aInstanceData);
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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 GDI 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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