1 // Copyright 2016 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 "chrome/browser/media/webrtc/window_icon_util.h" 6 7 #include "ui/base/x/x11_util.h" 8 #include "ui/gfx/x/x11_atom_cache.h" 9 GetWindowIcon(content::DesktopMediaID id)10gfx::ImageSkia GetWindowIcon(content::DesktopMediaID id) { 11 DCHECK(id.type == content::DesktopMediaID::TYPE_WINDOW); 12 13 std::vector<uint32_t> data; 14 if (!ui::GetArrayProperty(static_cast<x11::Window>(id.id), 15 gfx::GetAtom("_NET_WM_ICON"), &data)) { 16 return gfx::ImageSkia(); 17 } 18 19 // The format of |data| is concatenation of sections like 20 // [width, height, pixel data of size width * height], and the total bytes 21 // number of |data| is |size|. And here we are picking the largest icon. 22 int width = 0; 23 int height = 0; 24 int start = 0; 25 size_t i = 0; 26 while (i + 1 < data.size()) { 27 if ((i == 0 || static_cast<int>(data[i] * data[i + 1]) > width * height) && 28 (i + 1 + data[i] * data[i + 1] < data.size())) { 29 width = static_cast<int>(data[i]); 30 height = static_cast<int>(data[i + 1]); 31 start = i + 2; 32 } 33 i = i + 2 + static_cast<int>(data[i] * data[i + 1]); 34 } 35 36 SkBitmap result; 37 SkImageInfo info = SkImageInfo::MakeN32(width, height, kUnpremul_SkAlphaType); 38 result.allocPixels(info); 39 40 uint32_t* pixels_data = reinterpret_cast<uint32_t*>(result.getPixels()); 41 42 for (long y = 0; y < height; ++y) { 43 for (long x = 0; x < width; ++x) { 44 pixels_data[result.rowBytesAsPixels() * y + x] = 45 static_cast<uint32_t>(data[start + width * y + x]); 46 } 47 } 48 49 return gfx::ImageSkia::CreateFrom1xBitmap(result); 50 } 51