| // 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/image.h" |
| |
| #include "base/win/scoped_gdi_object.h" |
| #include "base/win/scoped_hdc.h" |
| #include "base/win/scoped_select_object.h" |
| #include "printing/metafile.h" |
| #include "skia/ext/platform_device.h" |
| #include "ui/gfx/gdi_util.h" // EMF support |
| #include "ui/gfx/rect.h" |
| |
| |
| namespace { |
| |
| // A simple class which temporarily overrides system settings. |
| // The bitmap image rendered via the PlayEnhMetaFile() function depends on |
| // some system settings. |
| // As a workaround for such dependency, this class saves the system settings |
| // and changes them. This class also restore the saved settings in its |
| // destructor. |
| class DisableFontSmoothing { |
| public: |
| explicit DisableFontSmoothing() : enable_again_(false) { |
| BOOL enabled; |
| if (SystemParametersInfo(SPI_GETFONTSMOOTHING, 0, &enabled, 0) && |
| enabled) { |
| if (SystemParametersInfo(SPI_SETFONTSMOOTHING, FALSE, NULL, 0)) |
| enable_again_ = true; |
| } |
| } |
| |
| ~DisableFontSmoothing() { |
| if (enable_again_) { |
| BOOL result = SystemParametersInfo(SPI_SETFONTSMOOTHING, TRUE, NULL, 0); |
| DCHECK(result); |
| } |
| } |
| |
| private: |
| bool enable_again_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DisableFontSmoothing); |
| }; |
| |
| } // namespace |
| |
| namespace printing { |
| |
| bool Image::LoadMetafile(const Metafile& metafile) { |
| gfx::Rect rect(metafile.GetPageBounds(1)); |
| DisableFontSmoothing disable_in_this_scope; |
| |
| // Create a temporary HDC and bitmap to retrieve the rendered data. |
| base::win::ScopedCreateDC hdc(::CreateCompatibleDC(NULL)); |
| BITMAPV4HEADER hdr; |
| DCHECK_EQ(rect.x(), 0); |
| DCHECK_EQ(rect.y(), 0); |
| DCHECK_GE(rect.width(), 0); // Metafile could be empty. |
| DCHECK_GE(rect.height(), 0); |
| |
| if (rect.width() < 1 || rect.height() < 1) |
| return false; |
| |
| size_ = rect.size(); |
| gfx::CreateBitmapV4Header(rect.width(), rect.height(), &hdr); |
| unsigned char* bits = NULL; |
| base::win::ScopedBitmap bitmap( |
| ::CreateDIBSection(hdc.Get(), reinterpret_cast<BITMAPINFO*>(&hdr), 0, |
| reinterpret_cast<void**>(&bits), NULL, 0)); |
| DCHECK(bitmap); |
| base::win::ScopedSelectObject select_object(hdc.Get(), bitmap); |
| |
| skia::InitializeDC(hdc.Get()); |
| |
| bool success = metafile.Playback(hdc.Get(), NULL); |
| |
| row_length_ = size_.width() * sizeof(uint32); |
| size_t bytes = row_length_ * size_.height(); |
| DCHECK(bytes); |
| |
| data_.assign(bits, bits + bytes); |
| |
| return success; |
| } |
| |
| } // namespace printing |