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122 lines
3.9 KiB
C++
122 lines
3.9 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 "ScaledFontWin.h"
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#include "UnscaledFontGDI.h"
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#include "AutoHelpersWin.h"
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#include "Logging.h"
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#include "nsString.h"
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#include "skia/include/ports/SkTypeface_win.h"
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#include "cairo-win32.h"
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#include "HelpersWinFonts.h"
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namespace mozilla {
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namespace gfx {
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ScaledFontWin::ScaledFontWin(const LOGFONT* aFont,
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const RefPtr<UnscaledFont>& aUnscaledFont,
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Float aSize)
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: ScaledFontBase(aUnscaledFont, aSize), mLogFont(*aFont) {}
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bool UnscaledFontGDI::GetFontFileData(FontFileDataOutput aDataCallback,
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void* aBaton) {
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AutoDC dc;
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AutoSelectFont font(dc.GetDC(), &mLogFont);
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// Check for a font collection first.
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uint32_t table = 0x66637474; // 'ttcf'
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uint32_t tableSize = ::GetFontData(dc.GetDC(), table, 0, nullptr, 0);
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if (tableSize == GDI_ERROR) {
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// Try as if just a single font.
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table = 0;
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tableSize = ::GetFontData(dc.GetDC(), table, 0, nullptr, 0);
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if (tableSize == GDI_ERROR) {
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return false;
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}
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}
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UniquePtr<uint8_t[]> fontData(new uint8_t[tableSize]);
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uint32_t sizeGot =
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::GetFontData(dc.GetDC(), table, 0, fontData.get(), tableSize);
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if (sizeGot != tableSize) {
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return false;
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}
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aDataCallback(fontData.get(), tableSize, 0, aBaton);
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return true;
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}
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bool ScaledFontWin::GetFontInstanceData(FontInstanceDataOutput aCb,
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void* aBaton) {
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aCb(reinterpret_cast<uint8_t*>(&mLogFont), sizeof(mLogFont), nullptr, 0,
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aBaton);
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return true;
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}
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bool UnscaledFontGDI::GetFontInstanceData(FontInstanceDataOutput aCb,
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void* aBaton) {
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aCb(reinterpret_cast<uint8_t*>(&mLogFont), sizeof(mLogFont), aBaton);
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return true;
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}
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bool UnscaledFontGDI::GetFontDescriptor(FontDescriptorOutput aCb,
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void* aBaton) {
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// Because all the callers of this function are preparing a recorded
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// event to be played back in another process, it's not helpful to ever
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// return a font descriptor, since it isn't meaningful in another
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// process. Those callers will always need to send full font data, and
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// returning false here will ensure that that happens.
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return false;
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}
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already_AddRefed<UnscaledFont> UnscaledFontGDI::CreateFromFontDescriptor(
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const uint8_t* aData, uint32_t aDataLength, uint32_t aIndex) {
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if (aDataLength < sizeof(LOGFONT)) {
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gfxWarning() << "GDI font descriptor is truncated.";
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return nullptr;
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}
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const LOGFONT* logFont = reinterpret_cast<const LOGFONT*>(aData);
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RefPtr<UnscaledFont> unscaledFont = new UnscaledFontGDI(*logFont);
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return unscaledFont.forget();
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}
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already_AddRefed<ScaledFont> UnscaledFontGDI::CreateScaledFont(
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Float aGlyphSize, const uint8_t* aInstanceData,
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uint32_t aInstanceDataLength, const FontVariation* aVariations,
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uint32_t aNumVariations) {
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if (aInstanceDataLength < sizeof(LOGFONT)) {
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gfxWarning() << "GDI unscaled font instance data is truncated.";
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return nullptr;
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}
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return MakeAndAddRef<ScaledFontWin>(
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reinterpret_cast<const LOGFONT*>(aInstanceData), this, aGlyphSize);
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}
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AntialiasMode ScaledFontWin::GetDefaultAAMode() {
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return GetSystemDefaultAAMode();
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}
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SkTypeface* ScaledFontWin::CreateSkTypeface() {
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return SkCreateTypefaceFromLOGFONT(mLogFont);
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}
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cairo_font_face_t* ScaledFontWin::CreateCairoFontFace(
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cairo_font_options_t* aFontOptions) {
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if (mLogFont.lfFaceName[0] == 0) {
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return nullptr;
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}
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return cairo_win32_font_face_create_for_logfontw(&mLogFont);
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}
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} // namespace gfx
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} // namespace mozilla
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