blob: 486b3abb62438f11546eaa82a59abd3c2a041a51 [file] [log] [blame]
// Copyright (c) 2012 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 "printing/pdf_metafile_skia.h"
#include "base/containers/hash_tables.h"
#include "base/files/file_util.h"
#include "base/metrics/histogram.h"
#include "base/numerics/safe_conversions.h"
#include "base/posix/eintr_wrapper.h"
#include "skia/ext/refptr.h"
#include "skia/ext/vector_canvas.h"
#include "third_party/skia/include/core/SkData.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "third_party/skia/include/core/SkScalar.h"
#include "third_party/skia/include/core/SkStream.h"
#include "third_party/skia/include/core/SkTypeface.h"
#include "third_party/skia/include/pdf/SkPDFDevice.h"
#include "third_party/skia/include/pdf/SkPDFDocument.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/size.h"
#if defined(OS_MACOSX)
#include "printing/pdf_metafile_cg_mac.h"
#endif
#if defined(OS_POSIX)
#include "base/file_descriptor_posix.h"
#endif
namespace printing {
struct PdfMetafileSkiaData {
skia::RefPtr<SkPDFDevice> current_page_;
skia::RefPtr<SkCanvas> current_page_canvas_;
SkPDFDocument pdf_doc_;
SkDynamicMemoryWStream pdf_stream_;
#if defined(OS_MACOSX)
PdfMetafileCg pdf_cg_;
#endif
};
PdfMetafileSkia::~PdfMetafileSkia() {}
bool PdfMetafileSkia::Init() {
return true;
}
bool PdfMetafileSkia::InitFromData(const void* src_buffer,
uint32 src_buffer_size) {
return data_->pdf_stream_.write(src_buffer, src_buffer_size);
}
bool PdfMetafileSkia::StartPage(const gfx::Size& page_size,
const gfx::Rect& content_area,
const float& scale_factor) {
DCHECK(!data_->current_page_canvas_);
// Adjust for the margins and apply the scale factor.
SkMatrix transform;
transform.setTranslate(SkIntToScalar(content_area.x()),
SkIntToScalar(content_area.y()));
transform.preScale(SkFloatToScalar(scale_factor),
SkFloatToScalar(scale_factor));
SkISize pdf_page_size = SkISize::Make(page_size.width(), page_size.height());
SkISize pdf_content_size =
SkISize::Make(content_area.width(), content_area.height());
data_->current_page_ = skia::AdoptRef(
new SkPDFDevice(pdf_page_size, pdf_content_size, transform));
data_->current_page_canvas_ =
skia::AdoptRef(new SkCanvas(data_->current_page_.get()));
return true;
}
skia::VectorCanvas* PdfMetafileSkia::GetVectorCanvasForNewPage(
const gfx::Size& page_size,
const gfx::Rect& content_area,
const float& scale_factor) {
if (!StartPage(page_size, content_area, scale_factor))
return nullptr;
return data_->current_page_canvas_.get();
}
bool PdfMetafileSkia::FinishPage() {
DCHECK(data_->current_page_canvas_);
DCHECK(data_->current_page_);
data_->current_page_canvas_.clear(); // Unref SkCanvas.
data_->pdf_doc_.appendPage(data_->current_page_.get());
return true;
}
bool PdfMetafileSkia::FinishDocument() {
// Don't do anything if we've already set the data in InitFromData.
if (data_->pdf_stream_.getOffset())
return true;
if (data_->current_page_canvas_)
FinishPage();
data_->current_page_.clear();
int font_counts[SkAdvancedTypefaceMetrics::kOther_Font + 2];
data_->pdf_doc_.getCountOfFontTypes(font_counts);
for (int type = 0;
type <= SkAdvancedTypefaceMetrics::kOther_Font + 1;
type++) {
for (int count = 0; count < font_counts[type]; count++) {
UMA_HISTOGRAM_ENUMERATION(
"PrintPreview.FontType", type,
SkAdvancedTypefaceMetrics::kOther_Font + 2);
}
}
return data_->pdf_doc_.emitPDF(&data_->pdf_stream_);
}
uint32 PdfMetafileSkia::GetDataSize() const {
return base::checked_cast<uint32>(data_->pdf_stream_.getOffset());
}
bool PdfMetafileSkia::GetData(void* dst_buffer,
uint32 dst_buffer_size) const {
if (dst_buffer_size < GetDataSize())
return false;
SkAutoDataUnref data(data_->pdf_stream_.copyToData());
memcpy(dst_buffer, data->bytes(), dst_buffer_size);
return true;
}
gfx::Rect PdfMetafileSkia::GetPageBounds(unsigned int page_number) const {
// TODO(vandebo) add a method to get the page size for a given page to
// SkPDFDocument.
NOTIMPLEMENTED();
return gfx::Rect();
}
unsigned int PdfMetafileSkia::GetPageCount() const {
// TODO(vandebo) add a method to get the number of pages to SkPDFDocument.
NOTIMPLEMENTED();
return 0;
}
gfx::NativeDrawingContext PdfMetafileSkia::context() const {
NOTREACHED();
return NULL;
}
#if defined(OS_WIN)
bool PdfMetafileSkia::Playback(gfx::NativeDrawingContext hdc,
const RECT* rect) const {
NOTREACHED();
return false;
}
bool PdfMetafileSkia::SafePlayback(gfx::NativeDrawingContext hdc) const {
NOTREACHED();
return false;
}
#elif defined(OS_MACOSX)
/* TODO(caryclark): The set up of PluginInstance::PrintPDFOutput may result in
rasterized output. Even if that flow uses PdfMetafileCg::RenderPage,
the drawing of the PDF into the canvas may result in a rasterized output.
PDFMetafileSkia::RenderPage should be not implemented as shown and instead
should do something like the following CL in PluginInstance::PrintPDFOutput:
http://codereview.chromium.org/7200040/diff/1/webkit/plugins/ppapi/ppapi_plugin_instance.cc
*/
bool PdfMetafileSkia::RenderPage(unsigned int page_number,
CGContextRef context,
const CGRect rect,
const MacRenderPageParams& params) const {
DCHECK_GT(data_->pdf_stream_.getOffset(), 0U);
if (data_->pdf_cg_.GetDataSize() == 0) {
SkAutoDataUnref data(data_->pdf_stream_.copyToData());
data_->pdf_cg_.InitFromData(data->bytes(), data->size());
}
return data_->pdf_cg_.RenderPage(page_number, context, rect, params);
}
#endif
bool PdfMetafileSkia::SaveTo(base::File* file) const {
if (GetDataSize() == 0U)
return false;
SkAutoDataUnref data(data_->pdf_stream_.copyToData());
// TODO(halcanary): rewrite this function without extra data copy
// using SkStreamAsset.
const char* ptr = reinterpret_cast<const char*>(data->data());
int size = base::checked_cast<int>(data->size());
return file->WriteAtCurrentPos(ptr, size) == size;
}
#if defined(OS_CHROMEOS) || defined(OS_ANDROID)
bool PdfMetafileSkia::SaveToFD(const base::FileDescriptor& fd) const {
DCHECK_GT(data_->pdf_stream_.getOffset(), 0U);
if (fd.fd < 0) {
DLOG(ERROR) << "Invalid file descriptor!";
return false;
}
base::File file(fd.fd);
bool result = SaveTo(&file);
DLOG_IF(ERROR, !result) << "Failed to save file with fd " << fd.fd;
if (!fd.auto_close)
file.TakePlatformFile();
return result;
}
#endif
PdfMetafileSkia::PdfMetafileSkia() : data_(new PdfMetafileSkiaData) {
}
scoped_ptr<PdfMetafileSkia> PdfMetafileSkia::GetMetafileForCurrentPage() {
scoped_ptr<PdfMetafileSkia> metafile;
SkPDFDocument pdf_doc(SkPDFDocument::kDraftMode_Flags);
if (!pdf_doc.appendPage(data_->current_page_.get()))
return metafile.Pass();
SkDynamicMemoryWStream pdf_stream;
if (!pdf_doc.emitPDF(&pdf_stream))
return metafile.Pass();
SkAutoDataUnref data_copy(pdf_stream.copyToData());
if (data_copy->size() == 0)
return scoped_ptr<PdfMetafileSkia>();
metafile.reset(new PdfMetafileSkia);
if (!metafile->InitFromData(data_copy->bytes(),
base::checked_cast<uint32>(data_copy->size()))) {
metafile.reset();
}
return metafile.Pass();
}
} // namespace printing