| Index: chrome/browser/ui/window_snapshot/window_snapshot_win.cc
|
| diff --git a/chrome/browser/ui/window_snapshot/window_snapshot_win.cc b/chrome/browser/ui/window_snapshot/window_snapshot_win.cc
|
| new file mode 100755
|
| index 0000000000000000000000000000000000000000..66e0071bb4bec7ebaf26a3cd5bd861d14959c184
|
| --- /dev/null
|
| +++ b/chrome/browser/ui/window_snapshot/window_snapshot_win.cc
|
| @@ -0,0 +1,72 @@
|
| +// 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 "chrome/browser/ui/window_snapshot/window_snapshot.h"
|
| +
|
| +#include "base/win/scoped_gdi_object.h"
|
| +#include "base/win/scoped_hdc.h"
|
| +#include "gfx/codec/png_codec.h"
|
| +#include "gfx/gdi_util.h"
|
| +#include "gfx/rect.h"
|
| +
|
| +namespace browser {
|
| +
|
| +gfx::Rect GrabWindowSnapshot(gfx::NativeWindow window_handle,
|
| + std::vector<unsigned char>* png_representation) {
|
| + // Create a memory DC that's compatible with the window.
|
| + HDC window_hdc = GetWindowDC(window_handle);
|
| + base::win::ScopedHDC mem_hdc(CreateCompatibleDC(window_hdc));
|
| +
|
| + // Create a DIB that's the same size as the window.
|
| + RECT content_rect = {0, 0, 0, 0};
|
| + ::GetWindowRect(window_handle, &content_rect);
|
| + content_rect.right++; // Match what PrintWindow wants.
|
| + int width = content_rect.right - content_rect.left;
|
| + int height = content_rect.bottom - content_rect.top;
|
| + BITMAPINFOHEADER hdr;
|
| + gfx::CreateBitmapHeader(width, height, &hdr);
|
| + unsigned char *bit_ptr = NULL;
|
| + base::win::ScopedBitmap bitmap(
|
| + CreateDIBSection(mem_hdc,
|
| + reinterpret_cast<BITMAPINFO*>(&hdr),
|
| + DIB_RGB_COLORS,
|
| + reinterpret_cast<void **>(&bit_ptr),
|
| + NULL, 0));
|
| +
|
| + SelectObject(mem_hdc, bitmap);
|
| + // Clear the bitmap to white (so that rounded corners on windows
|
| + // show up on a white background, and strangely-shaped windows
|
| + // look reasonable). Not capturing an alpha mask saves a
|
| + // bit of space.
|
| + PatBlt(mem_hdc, 0, 0, width, height, WHITENESS);
|
| + // Grab a copy of the window
|
| + // First, see if PrintWindow is defined (it's not in Windows 2000).
|
| + typedef BOOL (WINAPI *PrintWindowPointer)(HWND, HDC, UINT);
|
| + PrintWindowPointer print_window =
|
| + reinterpret_cast<PrintWindowPointer>(
|
| + GetProcAddress(GetModuleHandle(L"User32.dll"), "PrintWindow"));
|
| +
|
| + // If PrintWindow is defined, use it. It will work on partially
|
| + // obscured windows, and works better for out of process sub-windows.
|
| + // Otherwise grab the bits we can get with BitBlt; it's better
|
| + // than nothing and will work fine in the average case (window is
|
| + // completely on screen).
|
| + if (print_window)
|
| + (*print_window)(window_handle, mem_hdc, 0);
|
| + else
|
| + BitBlt(mem_hdc, 0, 0, width, height, window_hdc, 0, 0, SRCCOPY);
|
| +
|
| + // We now have a copy of the window contents in a DIB, so
|
| + // encode it into a useful format for posting to the bug report
|
| + // server.
|
| + gfx::PNGCodec::Encode(bit_ptr, gfx::PNGCodec::FORMAT_BGRA,
|
| + width, height, width * 4, true,
|
| + png_representation);
|
| +
|
| + ReleaseDC(window_handle, window_hdc);
|
| +
|
| + return gfx::Rect(width, height);
|
| +}
|
| +
|
| +} // namespace browser
|
|
|