1// Copyright (c) 2011 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "printing/printed_document.h" 6 7#include "base/logging.h" 8#include "printing/page_number.h" 9#include "printing/printed_pages_source.h" 10#include "printing/printed_page.h" 11#include "printing/units.h" 12#include "skia/ext/platform_device.h" 13 14namespace { 15 16void SimpleModifyWorldTransform(HDC context, 17 int offset_x, 18 int offset_y, 19 double shrink_factor) { 20 XFORM xform = { 0 }; 21 xform.eDx = static_cast<float>(offset_x); 22 xform.eDy = static_cast<float>(offset_y); 23 xform.eM11 = xform.eM22 = static_cast<float>(1. / shrink_factor); 24 BOOL res = ModifyWorldTransform(context, &xform, MWT_LEFTMULTIPLY); 25 DCHECK_NE(res, 0); 26} 27 28void DrawRect(HDC context, gfx::Rect rect) { 29 Rectangle(context, rect.x(), rect.y(), rect.right(), rect.bottom()); 30} 31 32} // namespace 33 34namespace printing { 35 36void PrintedDocument::RenderPrintedPage( 37 const PrintedPage& page, gfx::NativeDrawingContext context) const { 38#ifndef NDEBUG 39 { 40 // Make sure the page is from our list. 41 base::AutoLock lock(lock_); 42 DCHECK(&page == mutable_.pages_.find(page.page_number() - 1)->second.get()); 43 } 44#endif 45 46 DCHECK(context); 47 48 const PageSetup& page_setup(immutable_.settings_.page_setup_device_units()); 49 gfx::Rect content_area; 50 page.GetCenteredPageContentRect(page_setup.physical_size(), &content_area); 51 52 // Save the state to make sure the context this function call does not modify 53 // the device context. 54 int saved_state = SaveDC(context); 55 DCHECK_NE(saved_state, 0); 56 skia::InitializeDC(context); 57 { 58 // Save the state (again) to apply the necessary world transformation. 59 int saved_state = SaveDC(context); 60 DCHECK_NE(saved_state, 0); 61 62 // Setup the matrix to translate and scale to the right place. Take in 63 // account the actual shrinking factor. 64 // Note that the printing output is relative to printable area of the page. 65 // That is 0,0 is offset by PHYSICALOFFSETX/Y from the page. 66 SimpleModifyWorldTransform( 67 context, 68 content_area.x() - page_setup.printable_area().x(), 69 content_area.y() - page_setup.printable_area().y(), 70 page.shrink_factor()); 71 72 ::StartPage(context); 73 if (!page.metafile()->SafePlayback(context)) { 74 NOTREACHED(); 75 } 76 ::EndPage(context); 77 78 BOOL res = RestoreDC(context, saved_state); 79 DCHECK_NE(res, 0); 80 } 81 82 int res = RestoreDC(context, saved_state); 83 DCHECK_NE(res, 0); 84} 85 86} // namespace printing 87