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Unified Diff: chrome/browser/ui/window_snapshot/window_snapshot_win.cc

Issue 6386009: Remove app/win/win_util.h,cc etc. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Merge with NSApp changes in r73581 Created 9 years, 11 months ago
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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

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