| // 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/printed_document.h" |
| |
| #include "base/logging.h" |
| #include "printing/page_number.h" |
| #include "printing/printed_pages_source.h" |
| #include "printing/printed_page.h" |
| #include "printing/units.h" |
| #include "skia/ext/platform_device.h" |
| |
| namespace { |
| |
| void SimpleModifyWorldTransform(HDC context, |
| int offset_x, |
| int offset_y, |
| float shrink_factor) { |
| XFORM xform = { 0 }; |
| xform.eDx = static_cast<float>(offset_x); |
| xform.eDy = static_cast<float>(offset_y); |
| xform.eM11 = xform.eM22 = 1.f / shrink_factor; |
| BOOL res = ModifyWorldTransform(context, &xform, MWT_LEFTMULTIPLY); |
| DCHECK_NE(res, 0); |
| } |
| |
| } // namespace |
| |
| namespace printing { |
| |
| void PrintedDocument::RenderPrintedPage( |
| const PrintedPage& page, gfx::NativeDrawingContext context) const { |
| #ifndef NDEBUG |
| { |
| // Make sure the page is from our list. |
| base::AutoLock lock(lock_); |
| DCHECK(&page == mutable_.pages_.find(page.page_number() - 1)->second.get()); |
| } |
| #endif |
| |
| DCHECK(context); |
| |
| const PageSetup& page_setup(immutable_.settings_.page_setup_device_units()); |
| gfx::Rect content_area; |
| page.GetCenteredPageContentRect(page_setup.physical_size(), &content_area); |
| |
| // Save the state to make sure the context this function call does not modify |
| // the device context. |
| int saved_state = SaveDC(context); |
| DCHECK_NE(saved_state, 0); |
| skia::InitializeDC(context); |
| { |
| // Save the state (again) to apply the necessary world transformation. |
| int saved_state = SaveDC(context); |
| DCHECK_NE(saved_state, 0); |
| |
| // Setup the matrix to translate and scale to the right place. Take in |
| // account the actual shrinking factor. |
| // Note that the printing output is relative to printable area of the page. |
| // That is 0,0 is offset by PHYSICALOFFSETX/Y from the page. |
| SimpleModifyWorldTransform( |
| context, |
| content_area.x() - page_setup.printable_area().x(), |
| content_area.y() - page_setup.printable_area().y(), |
| page.shrink_factor()); |
| |
| ::StartPage(context); |
| if (!page.metafile()->SafePlayback(context)) { |
| NOTREACHED(); |
| } |
| ::EndPage(context); |
| |
| BOOL res = RestoreDC(context, saved_state); |
| DCHECK_NE(res, 0); |
| } |
| |
| int res = RestoreDC(context, saved_state); |
| DCHECK_NE(res, 0); |
| } |
| |
| } // namespace printing |