/
printing_handler_win.cc
176 lines (153 loc) · 6.53 KB
/
printing_handler_win.cc
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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/utility/printing_handler_win.h"
#include "base/files/file_util.h"
#include "base/lazy_instance.h"
#include "base/path_service.h"
#include "base/scoped_native_library.h"
#include "chrome/common/chrome_utility_printing_messages.h"
#include "chrome/common/print_messages.h"
#include "content/public/utility/utility_thread.h"
#include "pdf/pdf.h"
#include "printing/emf_win.h"
#include "printing/page_range.h"
#include "printing/pdf_render_settings.h"
#include "ui/gfx/gdi_util.h"
namespace printing {
namespace {
bool Send(IPC::Message* message) {
return content::UtilityThread::Get()->Send(message);
}
void ReleaseProcessIfNeeded() {
content::UtilityThread::Get()->ReleaseProcess();
}
void PreCacheFontCharacters(const LOGFONT* logfont,
const wchar_t* text,
size_t text_length) {
#if 0
Send(new ChromeUtilityHostMsg_PreCacheFontCharacters(
*logfont, base::string16(text, text_length)));
#endif
}
} // namespace
PrintingHandlerWin::PrintingHandlerWin() {
chrome_pdf::SetPDFEnsureTypefaceCharactersAccessible(PreCacheFontCharacters);
}
PrintingHandlerWin::~PrintingHandlerWin() {}
bool PrintingHandlerWin::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(PrintingHandlerWin, message)
IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles,
OnRenderPDFPagesToMetafile)
IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles_GetPage,
OnRenderPDFPagesToMetafileGetPage)
IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles_Stop,
OnRenderPDFPagesToMetafileStop)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void PrintingHandlerWin::OnRenderPDFPagesToMetafile(
IPC::PlatformFileForTransit pdf_transit,
const PdfRenderSettings& settings) {
pdf_rendering_settings_ = settings;
chrome_pdf::SetPDFUseGDIPrinting(pdf_rendering_settings_.mode ==
PdfRenderSettings::Mode::GDI_TEXT);
int postscript_level;
switch (pdf_rendering_settings_.mode) {
case PdfRenderSettings::Mode::POSTSCRIPT_LEVEL2:
postscript_level = chrome_pdf::PrintingMode::kPostScript2;
break;
case PdfRenderSettings::Mode::POSTSCRIPT_LEVEL3:
postscript_level = chrome_pdf::PrintingMode::kPostScript3;
break;
default:
postscript_level =
chrome_pdf::PrintingMode::kEmf; // Not using postscript.
}
chrome_pdf::SetPDFUsePrintMode(postscript_level);
base::File pdf_file = IPC::PlatformFileForTransitToFile(pdf_transit);
int page_count = LoadPDF(std::move(pdf_file));
Send(
new ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageCount(page_count));
}
void PrintingHandlerWin::OnRenderPDFPagesToMetafileGetPage(
int page_number,
IPC::PlatformFileForTransit output_file) {
base::File emf_file = IPC::PlatformFileForTransitToFile(output_file);
float scale_factor = 1.0f;
bool postscript = pdf_rendering_settings_.mode ==
PdfRenderSettings::Mode::POSTSCRIPT_LEVEL2 ||
pdf_rendering_settings_.mode ==
PdfRenderSettings::Mode::POSTSCRIPT_LEVEL3;
bool success = RenderPdfPageToMetafile(page_number, std::move(emf_file),
&scale_factor, postscript);
Send(new ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageDone(
success, scale_factor));
}
void PrintingHandlerWin::OnRenderPDFPagesToMetafileStop() {
ReleaseProcessIfNeeded();
}
int PrintingHandlerWin::LoadPDF(base::File pdf_file) {
int64_t length64 = pdf_file.GetLength();
if (length64 <= 0 || length64 > std::numeric_limits<int>::max())
return 0;
int length = static_cast<int>(length64);
pdf_data_.resize(length);
if (length != pdf_file.Read(0, pdf_data_.data(), pdf_data_.size()))
return 0;
int total_page_count = 0;
if (!chrome_pdf::GetPDFDocInfo(&pdf_data_.front(), pdf_data_.size(),
&total_page_count, nullptr)) {
return 0;
}
return total_page_count;
}
bool PrintingHandlerWin::RenderPdfPageToMetafile(int page_number,
base::File output_file,
float* scale_factor,
bool postscript) {
Emf metafile;
metafile.Init();
// We need to scale down DC to fit an entire page into DC available area.
// Current metafile is based on screen DC and have current screen size.
// Writing outside of those boundaries will result in the cut-off output.
// On metafiles (this is the case here), scaling down will still record
// original coordinates and we'll be able to print in full resolution.
// Before playback we'll need to counter the scaling up that will happen
// in the service (print_system_win.cc).
//
// The postscript driver does not use the metafile size since it outputs
// postscript rather than a metafile. Instead it uses the printable area
// sent to RenderPDFPageToDC to determine the area to render. Therefore,
// don't scale the DC to match the metafile, and send the printer physical
// offsets to the driver.
if (!postscript) {
*scale_factor = gfx::CalculatePageScale(
metafile.context(), pdf_rendering_settings_.area.right(),
pdf_rendering_settings_.area.bottom());
gfx::ScaleDC(metafile.context(), *scale_factor);
}
// The underlying metafile is of type Emf and ignores the arguments passed
// to StartPage.
metafile.StartPage(gfx::Size(), gfx::Rect(), 1);
int offset_x = postscript ? pdf_rendering_settings_.offsets.x() : 0;
int offset_y = postscript ? pdf_rendering_settings_.offsets.y() : 0;
if (!chrome_pdf::RenderPDFPageToDC(
&pdf_data_.front(), pdf_data_.size(), page_number, metafile.context(),
pdf_rendering_settings_.dpi.width(),
pdf_rendering_settings_.dpi.height(),
pdf_rendering_settings_.area.x() - offset_x,
pdf_rendering_settings_.area.y() - offset_y,
pdf_rendering_settings_.area.width(),
pdf_rendering_settings_.area.height(), true, false, true, true,
pdf_rendering_settings_.use_color,
pdf_rendering_settings_.autorotate)) {
return false;
}
metafile.FinishPage();
metafile.FinishDocument();
return metafile.SaveTo(&output_file);
}
} // namespace printing