| // 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 "printing/printed_document.h" |
| |
| #include "base/logging.h" |
| #include "base/string_util.h" |
| #include "gfx/font.h" |
| #include "printing/page_number.h" |
| #include "printing/page_overlays.h" |
| #include "printing/printed_pages_source.h" |
| #include "printing/printed_page.h" |
| #include "printing/units.h" |
| #include "skia/ext/platform_device.h" |
| |
| #if defined(OS_WIN) |
| namespace { |
| |
| void SimpleModifyWorldTransform(HDC context, |
| int offset_x, |
| int offset_y, |
| double shrink_factor) { |
| XFORM xform = { 0 }; |
| xform.eDx = static_cast<float>(offset_x); |
| xform.eDy = static_cast<float>(offset_y); |
| xform.eM11 = xform.eM22 = static_cast<float>(1. / shrink_factor); |
| BOOL res = ModifyWorldTransform(context, &xform, MWT_LEFTMULTIPLY); |
| DCHECK_NE(res, 0); |
| } |
| |
| void DrawRect(HDC context, gfx::Rect rect) { |
| Rectangle(context, rect.x(), rect.y(), rect.right(), rect.bottom()); |
| } |
| |
| } // namespace |
| #endif // OS_WIN |
| |
| namespace printing { |
| |
| void PrintedDocument::RenderPrintedPage( |
| const PrintedPage& page, gfx::NativeDrawingContext context) const { |
| #ifndef NDEBUG |
| { |
| // Make sure the page is from our list. |
| AutoLock lock(lock_); |
| DCHECK(&page == mutable_.pages_.find(page.page_number() - 1)->second.get()); |
| } |
| #endif |
| |
| const printing::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::PlatformDevice::InitializeDC(context); |
| { |
| // Save the state (again) to apply the necessary world transformation. |
| int saved_state = SaveDC(context); |
| DCHECK_NE(saved_state, 0); |
| |
| #if 0 |
| // Debug code to visually verify margins (leaks GDI handles). |
| XFORM debug_xform = { 0 }; |
| ModifyWorldTransform(context, &debug_xform, MWT_IDENTITY); |
| // Printable area: |
| SelectObject(context, CreatePen(PS_SOLID, 1, RGB(0, 0, 0))); |
| SelectObject(context, CreateSolidBrush(RGB(0x90, 0x90, 0x90))); |
| Rectangle(context, |
| 0, |
| 0, |
| page_setup.printable_area().width(), |
| page_setup.printable_area().height()); |
| // Overlay area: |
| gfx::Rect debug_overlay_area(page_setup.overlay_area()); |
| debug_overlay_area.Offset(-page_setup.printable_area().x(), |
| -page_setup.printable_area().y()); |
| SelectObject(context, CreateSolidBrush(RGB(0xb0, 0xb0, 0xb0))); |
| DrawRect(context, debug_overlay_area); |
| // Content area: |
| gfx::Rect debug_content_area(content_area()); |
| debug_content_area.Offset(-page_setup.printable_area().x(), |
| -page_setup.printable_area().y()); |
| SelectObject(context, CreateSolidBrush(RGB(0xd0, 0xd0, 0xd0))); |
| DrawRect(context, debug_content_area); |
| #endif |
| |
| // 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(), |
| mutable_.shrink_factor); |
| |
| if (!page.native_metafile()->SafePlayback(context)) { |
| NOTREACHED(); |
| } |
| |
| BOOL res = RestoreDC(context, saved_state); |
| DCHECK_NE(res, 0); |
| } |
| |
| // Print the header and footer. Offset by printable area offset (see comment |
| // above). |
| SimpleModifyWorldTransform( |
| context, |
| -page_setup.printable_area().x(), |
| -page_setup.printable_area().y(), |
| 1); |
| int base_font_size = gfx::Font().GetHeight(); |
| int new_font_size = ConvertUnit(10, |
| immutable_.settings_.desired_dpi, |
| immutable_.settings_.device_units_per_inch()); |
| DCHECK_GT(new_font_size, base_font_size); |
| gfx::Font font(gfx::Font().DeriveFont(new_font_size - base_font_size)); |
| HGDIOBJ old_font = SelectObject(context, font.GetNativeFont()); |
| DCHECK(old_font != NULL); |
| // We don't want a white square around the text ever if overflowing. |
| SetBkMode(context, TRANSPARENT); |
| PrintHeaderFooter(context, page, PageOverlays::LEFT, PageOverlays::TOP, |
| font); |
| PrintHeaderFooter(context, page, PageOverlays::CENTER, PageOverlays::TOP, |
| font); |
| PrintHeaderFooter(context, page, PageOverlays::RIGHT, PageOverlays::TOP, |
| font); |
| PrintHeaderFooter(context, page, PageOverlays::LEFT, PageOverlays::BOTTOM, |
| font); |
| PrintHeaderFooter(context, page, PageOverlays::CENTER, PageOverlays::BOTTOM, |
| font); |
| PrintHeaderFooter(context, page, PageOverlays::RIGHT, PageOverlays::BOTTOM, |
| font); |
| int res = RestoreDC(context, saved_state); |
| DCHECK_NE(res, 0); |
| } |
| |
| } // namespace printing |