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2d90dfa6d7
RecordedEvent::EventType::INVALID should never be seen in a recording and so can be used as a sentinel value that we can assert against. If it is seen, then the recording should fail gracefully. Differential Revision: https://phabricator.services.mozilla.com/D198649
90 lines
2.6 KiB
C++
90 lines
2.6 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/ProfilerMarkers.h"
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#include "mozilla/UniquePtr.h"
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#include "InlineTranslator.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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UniquePtr<gfxContext> context =
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mDeviceContext->CreateReferenceRenderingContext();
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mBaseDT = context->GetDrawTarget();
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}
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bool PrintTranslator::TranslateRecording(PRFileDescStream& aRecording) {
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AUTO_PROFILER_MARKER_TEXT("PrintTranslator", LAYOUT_Printing, {},
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"PrintTranslator::TranslateRecording"_ns);
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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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uint8_t eventType = RecordedEvent::EventType::INVALID;
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ReadElement(aRecording, eventType);
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while (aRecording.good()) {
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bool success = RecordedEvent::DoWithEventFromStream(
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aRecording, static_cast<RecordedEvent::EventType>(eventType),
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[&](RecordedEvent* recordedEvent) -> bool {
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// Make sure that the whole event was read from the stream.
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if (!aRecording.good()) {
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return false;
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}
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return recordedEvent->PlayEvent(this);
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});
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if (!success) {
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return false;
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}
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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> PrintTranslator::CreateDrawTarget(
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ReferencePtr aRefPtr, const gfx::IntSize& aSize,
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gfx::SurfaceFormat aFormat) {
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UniquePtr<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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} // namespace layout
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} // namespace mozilla
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