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0df89c14c4
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.
102 lines
2.7 KiB
C++
102 lines
2.7 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 "PrintTranslator.h"
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#include "gfxContext.h"
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#include "nsDeviceContext.h"
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#include "mozilla/gfx/RecordedEvent.h"
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#include "mozilla/gfx/RecordingTypes.h"
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#include "mozilla/UniquePtr.h"
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using namespace mozilla::gfx;
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namespace mozilla {
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namespace layout {
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PrintTranslator::PrintTranslator(nsDeviceContext* aDeviceContext)
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: mDeviceContext(aDeviceContext)
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{
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RefPtr<gfxContext> context = mDeviceContext->CreateRenderingContext();
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mBaseDT = context->GetDrawTarget();
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}
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bool
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PrintTranslator::TranslateRecording(std::istream& aRecording)
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{
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uint32_t magicInt;
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ReadElement(aRecording, magicInt);
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if (magicInt != mozilla::gfx::kMagicInt) {
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return false;
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}
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uint16_t majorRevision;
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ReadElement(aRecording, majorRevision);
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if (majorRevision != kMajorRevision) {
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return false;
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}
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uint16_t minorRevision;
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ReadElement(aRecording, minorRevision);
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if (minorRevision > kMinorRevision) {
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return false;
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}
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int32_t eventType;
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ReadElement(aRecording, eventType);
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while (aRecording.good()) {
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UniquePtr<RecordedEvent> recordedEvent(
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RecordedEvent::LoadEventFromStream(aRecording,
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static_cast<RecordedEvent::EventType>(eventType)));
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// Make sure that the whole event was read from the stream successfully.
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if (!aRecording.good() || !recordedEvent) {
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return false;
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}
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recordedEvent->PlayEvent(this);
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ReadElement(aRecording, eventType);
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}
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return true;
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}
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already_AddRefed<DrawTarget>
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PrintTranslator::CreateDrawTarget(ReferencePtr aRefPtr,
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const gfx::IntSize &aSize,
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gfx::SurfaceFormat aFormat)
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{
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RefPtr<gfxContext> context = mDeviceContext->CreateRenderingContext();
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if (!context) {
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NS_WARNING("Failed to create rendering context for print.");
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return nullptr;
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}
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RefPtr<DrawTarget> drawTarget = context->GetDrawTarget();
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AddDrawTarget(aRefPtr, drawTarget);
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return drawTarget.forget();
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}
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FontType
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PrintTranslator::GetDesiredFontType()
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{
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switch (mBaseDT->GetBackendType()) {
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case BackendType::DIRECT2D:
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return FontType::DWRITE;
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case BackendType::CAIRO:
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return FontType::CAIRO;
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case BackendType::SKIA:
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return FontType::SKIA;
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case BackendType::COREGRAPHICS:
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case BackendType::COREGRAPHICS_ACCELERATED:
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return FontType::COREGRAPHICS;
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default:
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return FontType::CAIRO;
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}
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}
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} // namespace layout
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} // namespace mozilla
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