blob: e72033d04ffa46511978e7a2f9a8f8b538dfa54a [file] [log] [blame]
// Copyright (c) 2011 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/print_settings_initializer_win.h"
#include <windows.h>
#include "printing/print_settings.h"
namespace printing {
namespace {
bool IsPrinterXPS(HDC hdc) {
int device_type = ::GetDeviceCaps(hdc, TECHNOLOGY);
if (device_type != DT_RASPRINTER)
return false;
const DWORD escape = GETTECHNOLOGY;
const char* escape_ptr = reinterpret_cast<const char*>(&escape);
int ret =
ExtEscape(hdc, QUERYESCSUPPORT, sizeof(escape), escape_ptr, 0, nullptr);
if (ret <= 0)
return false;
char buffer[256];
memset(buffer, 0, sizeof(buffer));
ret = ExtEscape(hdc, GETTECHNOLOGY, 0, nullptr, sizeof(buffer) - 1, buffer);
if (ret <= 0)
return false;
static const char kXPSDriver[] = "http://schemas.microsoft.com/xps/2005/06";
return strcmp(buffer, kXPSDriver) == 0;
}
} // namespace
// static
void PrintSettingsInitializerWin::InitPrintSettings(
HDC hdc,
const DEVMODE& dev_mode,
PrintSettings* print_settings) {
DCHECK(hdc);
DCHECK(print_settings);
print_settings->SetOrientation(dev_mode.dmOrientation == DMORIENT_LANDSCAPE);
int dpi = GetDeviceCaps(hdc, LOGPIXELSX);
print_settings->set_dpi(dpi);
const int kAlphaCaps = SB_CONST_ALPHA | SB_PIXEL_ALPHA;
print_settings->set_supports_alpha_blend(
(GetDeviceCaps(hdc, SHADEBLENDCAPS) & kAlphaCaps) == kAlphaCaps);
// No printer device is known to advertise different dpi in X and Y axis; even
// the fax device using the 200x100 dpi setting. It's ought to break so many
// applications that it's not even needed to care about. Blink doesn't support
// different dpi settings in X and Y axis.
DCHECK_EQ(dpi, GetDeviceCaps(hdc, LOGPIXELSY));
DCHECK_EQ(GetDeviceCaps(hdc, SCALINGFACTORX), 0);
DCHECK_EQ(GetDeviceCaps(hdc, SCALINGFACTORY), 0);
// Initialize |page_setup_device_units_|.
gfx::Size physical_size_device_units(GetDeviceCaps(hdc, PHYSICALWIDTH),
GetDeviceCaps(hdc, PHYSICALHEIGHT));
gfx::Rect printable_area_device_units(GetDeviceCaps(hdc, PHYSICALOFFSETX),
GetDeviceCaps(hdc, PHYSICALOFFSETY),
GetDeviceCaps(hdc, HORZRES),
GetDeviceCaps(hdc, VERTRES));
// Sanity check the printable_area: we've seen crashes caused by a printable
// area rect of 0, 0, 0, 0, so it seems some drivers don't set it.
if (printable_area_device_units.IsEmpty() ||
!gfx::Rect(physical_size_device_units).Contains(
printable_area_device_units)) {
printable_area_device_units = gfx::Rect(physical_size_device_units);
}
DCHECK_EQ(print_settings->device_units_per_inch(), dpi);
print_settings->SetPrinterPrintableArea(physical_size_device_units,
printable_area_device_units,
false);
print_settings->set_printer_is_xps(IsPrinterXPS(hdc));
}
} // namespace printing