Print only the focused frame. This makes more sense than trying to print all...

chrome/renderer/mock_printer_driver_win.cc

-// Copyright (c) 2009 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/renderer/mock_printer_driver_win.h"
-
-#include "base/gfx/gdi_util.h"
-#include "base/logging.h"
-#include "printing/emf_win.h"
-#include "chrome/renderer/mock_printer.h"
-#include "skia/ext/platform_device.h"
-
-namespace {
-
-// A simple class which temporarily overrides system settings.
-// The bitmap image rendered via the PlayEnhMetaFile() function depends on
-// some system settings.
-// As a workaround for such dependency, this class saves the system settings
-// and changes them. This class also restore the saved settings in its
-// destructor.
-class SystemSettingsOverride {
- public:
-  SystemSettingsOverride() : font_smoothing_(0) {
-  }
-
-  ~SystemSettingsOverride() {
-    SystemParametersInfo(SPI_SETFONTSMOOTHING, font_smoothing_, NULL, 0);
-  }
-
-  BOOL Init(BOOL font_smoothing) {
-    if (!SystemParametersInfo(SPI_GETFONTSMOOTHING, 0, &font_smoothing_, 0))
-      return FALSE;
-    return SystemParametersInfo(SPI_SETFONTSMOOTHING, font_smoothing, NULL, 0);
-  }
-
- private:
-  BOOL font_smoothing_;
-};
-
-// A class which renders an EMF data and returns a raw bitmap data.
-// The bitmap data returned from Create() is deleted in the destructor of this
-// class. So, we need to create a copy of this bitmap data if it is used after
-// this object is deleted,
-class EmfRenderer {
- public:
-  EmfRenderer() : dc_(NULL), bitmap_(NULL) {
-  }
-
-  ~EmfRenderer() {
-    if (bitmap_) {
-      DeleteObject(bitmap_);
-      bitmap_ = NULL;
-    }
-    if (dc_) {
-      DeleteDC(dc_);
-      dc_ = NULL;
-    }
-  }
-
-  const void* Create(int width, int height, const printing::Emf* emf) {
-    CHECK(!dc_ && !bitmap_);
-
-    BITMAPV4HEADER header;
-    gfx::CreateBitmapV4Header(width, height, &header);
-
-    dc_ = CreateCompatibleDC(NULL);
-    if (!dc_)
-      return NULL;
-
-    void* bits;
-    bitmap_ = CreateDIBSection(dc_, reinterpret_cast<BITMAPINFO*>(&header), 0,
-                               &bits, NULL, 0);
-    if (!bitmap_ || !bits)
-      return NULL;
-
-    SelectObject(dc_, bitmap_);
-
-    skia::PlatformDevice::InitializeDC(dc_);
-    emf->Playback(dc_, NULL);
-
-    return reinterpret_cast<uint8*>(bits);
-  }
-
- private:
-  HDC dc_;
-  HBITMAP bitmap_;
-};
-
-}  // namespace
-
-MockPrinterDriverWin::MockPrinterDriverWin() {
-}
-
-MockPrinterDriverWin::~MockPrinterDriverWin() {
-}
-
-MockPrinterPage* MockPrinterDriverWin::LoadSource(const void* source_data,
-                                                  size_t source_size) {
-  // This code is mostly copied from the Image::LoadEMF() function in
-  // "src/chrome/browser/printing/printing_layout_uitest.cc".
-  printing::Emf emf;
-  emf.CreateFromData(source_data, source_size);
-  gfx::Rect rect(emf.GetBounds());
-
-  // Create a temporary DC and bitmap to retrieve the renderered data.
-  if (rect.width() <= 0 || rect.height() <= 0)
-    return NULL;
-
-  // Disable the font-smoothing feature of Windows.
-  SystemSettingsOverride system_settings;
-  system_settings.Init(FALSE);
-
-  // Render the EMF data and create a bitmap.
-  EmfRenderer renderer;
-  const void* bitmap_data = renderer.Create(rect.width(), rect.height(), &emf);
-  if (!bitmap_data)
-    return NULL;
-
-  // Create a new MockPrinterPage instance and return it.
-  size_t row_byte_width = rect.width() * 4;
-  size_t bitmap_size = row_byte_width * rect.height();
-  return new MockPrinterPage(rect.width(), rect.height(),
-                             source_data, source_size,
-                             bitmap_data, bitmap_size);
-}