blob: f844882b9ee106292e1b00ed939678274d3ddafd [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/backend/win_helper.h"
#include "printing/print_settings.h"
namespace printing {
namespace {
bool HasEscapeSupport(HDC hdc, DWORD escape) {
const char* ptr = reinterpret_cast<const char*>(&escape);
return ExtEscape(hdc, QUERYESCSUPPORT, sizeof(escape), ptr, 0, nullptr) > 0;
}
bool IsTechnology(HDC hdc, const char* technology) {
if (::GetDeviceCaps(hdc, TECHNOLOGY) != DT_RASPRINTER)
return false;
if (!HasEscapeSupport(hdc, GETTECHNOLOGY))
return false;
char buf[256];
memset(buf, 0, sizeof(buf));
if (ExtEscape(hdc, GETTECHNOLOGY, 0, nullptr, sizeof(buf) - 1, buf) <= 0)
return false;
return strcmp(buf, technology) == 0;
}
void SetPrinterToGdiMode(HDC hdc) {
// Try to set to GDI centric mode
DWORD mode = PSIDENT_GDICENTRIC;
const char* ptr = reinterpret_cast<const char*>(&mode);
ExtEscape(hdc, POSTSCRIPT_IDENTIFY, sizeof(DWORD), ptr, 0, nullptr);
}
int GetPrinterPostScriptLevel(HDC hdc) {
constexpr int param = FEATURESETTING_PSLEVEL;
const char* param_char_ptr = reinterpret_cast<const char*>(&param);
int param_out = 0;
char* param_out_char_ptr = reinterpret_cast<char*>(&param_out);
if (ExtEscape(hdc, GET_PS_FEATURESETTING, sizeof(param), param_char_ptr,
sizeof(param_out), param_out_char_ptr) > 0) {
return param_out;
}
return 0;
}
bool IsPrinterPostScript(HDC hdc, int* level) {
static constexpr char kPostScriptDriver[] = "PostScript";
// If printer does not support POSTSCRIPT_IDENTIFY, it cannot be set to GDI
// mode to check the language level supported. See if it looks like a
// postscript printer and supports the postscript functions that are
// supported in compatability mode. If so set to level 2 postscript.
if (!HasEscapeSupport(hdc, POSTSCRIPT_IDENTIFY)) {
if (!IsTechnology(hdc, kPostScriptDriver))
return false;
if (!HasEscapeSupport(hdc, POSTSCRIPT_PASSTHROUGH) ||
!HasEscapeSupport(hdc, POSTSCRIPT_DATA)) {
return false;
}
*level = 2;
return true;
}
// Printer supports POSTSCRIPT_IDENTIFY so we can assume it has a postscript
// driver. Set the printer to GDI mode in order to query the postscript
// level. Use GDI mode instead of PostScript mode so that if level detection
// fails or returns language level < 2 we can fall back to normal printing.
// Note: This escape must be called before other escapes.
SetPrinterToGdiMode(hdc);
if (!HasEscapeSupport(hdc, GET_PS_FEATURESETTING)) {
// Can't query the level, use level 2 to be safe
*level = 2;
return true;
}
// Get the language level. If invalid or < 2, return false to set printer to
// normal printing mode.
*level = GetPrinterPostScriptLevel(hdc);
return *level == 2 || *level == 3;
}
bool IsPrinterXPS(HDC hdc) {
static constexpr char kXPSDriver[] =
"http://schemas.microsoft.com/xps/2005/06";
return IsTechnology(hdc, kXPSDriver);
}
bool IsPrinterTextOnly(HDC hdc) {
return ::GetDeviceCaps(hdc, TECHNOLOGY) == DT_CHARSTREAM;
}
} // 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_x = GetDeviceCaps(hdc, LOGPIXELSX);
int dpi_y = GetDeviceCaps(hdc, LOGPIXELSY);
print_settings->set_dpi_xy(dpi_x, dpi_y);
const int kAlphaCaps = SB_CONST_ALPHA | SB_PIXEL_ALPHA;
print_settings->set_supports_alpha_blend(
(GetDeviceCaps(hdc, SHADEBLENDCAPS) & kAlphaCaps) == kAlphaCaps);
DCHECK_EQ(GetDeviceCaps(hdc, SCALINGFACTORX), 0);
DCHECK_EQ(GetDeviceCaps(hdc, SCALINGFACTORY), 0);
// Initialize |page_setup_device_units_|.
// Blink doesn't support different dpi settings in X and Y axis. However,
// some printers use them. So, to avoid a bad page calculation, scale page
// size components based on the dpi in the appropriate dimension.
int dpi = print_settings->dpi();
gfx::Size physical_size_device_units(
GetDeviceCaps(hdc, PHYSICALWIDTH) * dpi / dpi_x,
GetDeviceCaps(hdc, PHYSICALHEIGHT) * dpi / dpi_y);
gfx::Rect printable_area_device_units(
GetDeviceCaps(hdc, PHYSICALOFFSETX) * dpi / dpi_x,
GetDeviceCaps(hdc, PHYSICALOFFSETY) * dpi / dpi_y,
GetDeviceCaps(hdc, HORZRES) * dpi / dpi_x,
GetDeviceCaps(hdc, VERTRES) * dpi / dpi_y);
// 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_color(IsDevModeWithColor(&dev_mode) ? COLOR : GRAY);
// Check for postscript first so that we can change the mode with the
// first command.
int level;
if (IsPrinterPostScript(hdc, &level)) {
if (level == 2) {
print_settings->set_printer_type(
PrintSettings::PrinterType::TYPE_POSTSCRIPT_LEVEL2);
return;
}
DCHECK_EQ(3, level);
print_settings->set_printer_type(
PrintSettings::PrinterType::TYPE_POSTSCRIPT_LEVEL3);
return;
}
// Detects the generic / text only driver.
if (IsPrinterTextOnly(hdc)) {
print_settings->set_printer_type(PrintSettings::PrinterType::TYPE_TEXTONLY);
return;
}
if (IsPrinterXPS(hdc)) {
print_settings->set_printer_type(PrintSettings::PrinterType::TYPE_XPS);
return;
}
print_settings->set_printer_type(PrintSettings::PrinterType::TYPE_NONE);
}
} // namespace printing