239 lines
8.1 KiB
C++
239 lines
8.1 KiB
C++
// 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/print_messages.h"
|
|
#include "content/public/utility/utility_thread.h"
|
|
#include "printing/emf_win.h"
|
|
#include "printing/page_range.h"
|
|
#include "printing/pdf_render_settings.h"
|
|
#include "ui/gfx/gdi_util.h"
|
|
|
|
namespace {
|
|
|
|
bool Send(IPC::Message* message) {
|
|
return content::UtilityThread::Get()->Send(message);
|
|
}
|
|
|
|
void ReleaseProcessIfNeeded() {
|
|
content::UtilityThread::Get()->ReleaseProcessIfNeeded();
|
|
}
|
|
|
|
class PdfFunctions {
|
|
public:
|
|
PdfFunctions() : get_pdf_doc_info_func_(NULL),
|
|
render_pdf_to_dc_func_(NULL) {}
|
|
|
|
bool Init() {
|
|
base::FilePath module_path;
|
|
if (!PathService::Get(base::DIR_MODULE, &module_path))
|
|
return false;
|
|
base::FilePath::StringType name(FILE_PATH_LITERAL("pdf.dll"));
|
|
pdf_lib_.Reset(base::LoadNativeLibrary(module_path.Append(name), NULL));
|
|
if (!pdf_lib_.is_valid()) {
|
|
LOG(WARNING) << "Couldn't load PDF plugin";
|
|
return false;
|
|
}
|
|
|
|
get_pdf_doc_info_func_ =
|
|
reinterpret_cast<GetPDFDocInfoProc>(
|
|
pdf_lib_.GetFunctionPointer("GetPDFDocInfo"));
|
|
LOG_IF(WARNING, !get_pdf_doc_info_func_) << "Missing GetPDFDocInfo";
|
|
|
|
render_pdf_to_dc_func_ =
|
|
reinterpret_cast<RenderPDFPageToDCProc>(
|
|
pdf_lib_.GetFunctionPointer("RenderPDFPageToDC"));
|
|
LOG_IF(WARNING, !render_pdf_to_dc_func_) << "Missing RenderPDFPageToDC";
|
|
|
|
if (!get_pdf_doc_info_func_ || !render_pdf_to_dc_func_) {
|
|
Reset();
|
|
}
|
|
|
|
return IsValid();
|
|
}
|
|
|
|
bool IsValid() const {
|
|
return pdf_lib_.is_valid();
|
|
}
|
|
|
|
void Reset() {
|
|
pdf_lib_.Reset(NULL);
|
|
}
|
|
|
|
bool GetPDFDocInfo(const void* pdf_buffer,
|
|
int buffer_size,
|
|
int* page_count,
|
|
double* max_page_width) {
|
|
if (!get_pdf_doc_info_func_)
|
|
return false;
|
|
return get_pdf_doc_info_func_(pdf_buffer, buffer_size, page_count,
|
|
max_page_width);
|
|
}
|
|
|
|
bool RenderPDFPageToDC(const void* pdf_buffer,
|
|
int buffer_size,
|
|
int page_number,
|
|
HDC dc,
|
|
int dpi,
|
|
int bounds_origin_x,
|
|
int bounds_origin_y,
|
|
int bounds_width,
|
|
int bounds_height,
|
|
bool fit_to_bounds,
|
|
bool stretch_to_bounds,
|
|
bool keep_aspect_ratio,
|
|
bool center_in_bounds,
|
|
bool autorotate) {
|
|
if (!render_pdf_to_dc_func_)
|
|
return false;
|
|
return render_pdf_to_dc_func_(pdf_buffer, buffer_size, page_number,
|
|
dc, dpi, bounds_origin_x,
|
|
bounds_origin_y, bounds_width, bounds_height,
|
|
fit_to_bounds, stretch_to_bounds,
|
|
keep_aspect_ratio, center_in_bounds,
|
|
autorotate);
|
|
}
|
|
|
|
private:
|
|
// Exported by PDF plugin.
|
|
typedef bool (*GetPDFDocInfoProc)(const void* pdf_buffer,
|
|
int buffer_size, int* page_count,
|
|
double* max_page_width);
|
|
typedef bool (*RenderPDFPageToDCProc)(
|
|
const void* pdf_buffer, int buffer_size, int page_number, HDC dc,
|
|
int dpi, int bounds_origin_x, int bounds_origin_y,
|
|
int bounds_width, int bounds_height, bool fit_to_bounds,
|
|
bool stretch_to_bounds, bool keep_aspect_ratio, bool center_in_bounds,
|
|
bool autorotate);
|
|
|
|
RenderPDFPageToDCProc render_pdf_to_dc_func_;
|
|
GetPDFDocInfoProc get_pdf_doc_info_func_;
|
|
|
|
base::ScopedNativeLibrary pdf_lib_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(PdfFunctions);
|
|
};
|
|
|
|
base::LazyInstance<PdfFunctions> g_pdf_lib = LAZY_INSTANCE_INITIALIZER;
|
|
|
|
} // namespace
|
|
|
|
PrintingHandlerWin::PrintingHandlerWin() {}
|
|
|
|
PrintingHandlerWin::~PrintingHandlerWin() {}
|
|
|
|
// static
|
|
void PrintingHandlerWin::PreSandboxStartup() {
|
|
g_pdf_lib.Get().Init();
|
|
}
|
|
|
|
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 printing::PdfRenderSettings& settings) {
|
|
pdf_rendering_settings_ = settings;
|
|
base::File pdf_file = IPC::PlatformFileForTransitToFile(pdf_transit);
|
|
int page_count = LoadPDF(pdf_file.Pass());
|
|
//int page_count = 1;
|
|
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 success =
|
|
RenderPdfPageToMetafile(page_number, emf_file.Pass(), &scale_factor);
|
|
Send(new ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageDone(
|
|
success, scale_factor));
|
|
}
|
|
|
|
void PrintingHandlerWin::OnRenderPDFPagesToMetafileStop() {
|
|
ReleaseProcessIfNeeded();
|
|
}
|
|
|
|
int PrintingHandlerWin::LoadPDF(base::File pdf_file) {
|
|
if (!g_pdf_lib.Get().IsValid())
|
|
return 0;
|
|
|
|
int64 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 (!g_pdf_lib.Get().GetPDFDocInfo(
|
|
&pdf_data_.front(), pdf_data_.size(), &total_page_count, NULL)) {
|
|
return 0;
|
|
}
|
|
return total_page_count;
|
|
}
|
|
|
|
bool PrintingHandlerWin::RenderPdfPageToMetafile(int page_number,
|
|
base::File output_file,
|
|
float* scale_factor) {
|
|
printing::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).
|
|
*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);
|
|
if (!g_pdf_lib.Get().RenderPDFPageToDC(
|
|
&pdf_data_.front(),
|
|
pdf_data_.size(),
|
|
page_number,
|
|
metafile.context(),
|
|
pdf_rendering_settings_.dpi(),
|
|
pdf_rendering_settings_.area().x(),
|
|
pdf_rendering_settings_.area().y(),
|
|
pdf_rendering_settings_.area().width(),
|
|
pdf_rendering_settings_.area().height(),
|
|
true,
|
|
false,
|
|
true,
|
|
true,
|
|
pdf_rendering_settings_.autorotate())) {
|
|
return false;
|
|
}
|
|
metafile.FinishPage();
|
|
metafile.FinishDocument();
|
|
return metafile.SaveTo(&output_file);
|
|
}
|