一、目标：
目标一：传入参数
--notice-number=899
图形展示如下：
阅读此篇博客前，请确保你已经可以完整的编译出自己的chromium了。
入门插眼：https://blog.csdn.net/w1101662433/article/details/137949705
官方编译文档：https://github.com/chromium/chromium/blob/main/docs/windows_build_instructions.md
二、为什么要给任务栏加提示图标：
1.编译群里的部分小伙伴比较好奇怎么实现。。。2.指纹浏览器多开后，数量太多，需要使用不同的图标来区分不同的浏览器进程。3.类似重要信息，可以用来作为重要信息的提示，比较醒目。
三、修改chromium源码：
打开：
/chrome/browser/win/app_icon.cc
1.加入头部引用：
#include <iostream>
#include <Shobjidl.h>
#include <windows.h>
#include <shellapi.h>
#include "base/command_line.h"
#include "ui/aura/window_tree_host.h"
2. 新增插入3个函数：
新增函数1：生成带数字的ico图片：
HICON CreateNumberIcon(int number, int width) {
if (number > 999) number = 999;
// 创建32位ARGB位图
HDC hdcScreen = GetDC(nullptr);
HDC hdcMem = CreateCompatibleDC(hdcScreen);
BITMAPINFO bmi = { sizeof(BITMAPINFOHEADER) };
bmi.bmiHeader.biWidth = width;
bmi.bmiHeader.biHeight = -width; // 自上而下
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 32; // 关键：32位带Alpha通道
bmi.bmiHeader.biCompression = BI_RGB;
void* pBits = nullptr;
HBITMAP hBitmap = CreateDIBSection(hdcMem, &bmi, DIB_RGB_COLORS, &pBits, nullptr, 0);
HBITMAP hOldBitmap = static_cast<HBITMAP>(SelectObject(hdcMem, hBitmap));
// ==== 关键修改1：初始化透明背景 ====
memset(pBits, 0, width * width * 4); // 所有像素设为RGBA(0,0,0,0)
// 绘制红色圆形（保留透明区域）
HBRUSH hBrush = CreateSolidBrush(RGB(200, 60, 10)); //红色背景
//HBRUSH hBrush = CreateSolidBrush(RGB(255, 69, 0));
HBRUSH hOldBrush = static_cast<HBRUSH>(SelectObject(hdcMem, hBrush));
Ellipse(hdcMem, 0, 0, width, width);
SelectObject(hdcMem, hOldBrush);
DeleteObject(hBrush);
// 设置文字属性
int fontSize = (number > 99) ? width/1.8 : width/1.3;
LOGFONT lf = { fontSize, 0, 0, 0, FW_BOLD, FALSE, FALSE, FALSE, DEFAULT_CHARSET };
wcscpy_s(lf.lfFaceName, L"Arial");
HFONT hFont = CreateFontIndirect(&lf);
HFONT hOldFont = static_cast<HFONT>(SelectObject(hdcMem, hFont));
SetTextColor(hdcMem, RGB(254, 254, 251)); // 文字颜色
SetBkMode(hdcMem, TRANSPARENT); // 文字背景透明
// 绘制居中文字
std::wstring text = std::to_wstring(number);
RECT rect = { 0, 0, width, width };
DrawText(hdcMem, text.c_str(), -1, &rect, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
// ==== 关键修改2：设置Alpha通道 ====
DWORD* pixels = static_cast<DWORD*>(pBits);
const int totalPixels = width * width;
for (int i = 0; i < totalPixels; ++i) {
if (pixels[i] & 0x00FFFFFF) { // RGB通道非黑色
pixels[i] |= 0xFF000000; // 设置Alpha=255
}
}
// 清理资源
SelectObject(hdcMem, hOldFont);
DeleteObject(hFont);
SelectObject(hdcMem, hOldBitmap);
DeleteDC(hdcMem);
ReleaseDC(nullptr, hdcScreen);
// 创建图标
ICONINFO iconInfo = { TRUE, 0, 0, hBitmap, hBitmap };
HICON hIcon = CreateIconIndirect(&iconInfo);
DeleteObject(hBitmap);
return hIcon;
}
这个函数可以生成一个红底白字，透明背景的ico图片。
新增函数2：将ico覆盖到另一个ico上：
HICON CombineIconWithBadge(HICON hOriginalIcon, HICON num) {
// 获取原始图标尺寸
ICONINFO originalInfo = {0};
GetIconInfo(hOriginalIcon, &originalInfo);
BITMAP originalBmp = {0};
GetObject(originalInfo.hbmColor, sizeof(BITMAP), &originalBmp);
const int baseWidth = originalBmp.bmWidth;
const int baseHeight = originalBmp.bmHeight;
// 获取徽章图标尺寸
ICONINFO badgeInfo = {0};
GetIconInfo(num, &badgeInfo);
BITMAP badgeBmp = {0};
GetObject(badgeInfo.hbmColor, sizeof(BITMAP), &badgeBmp);
const int badgeWidth = badgeBmp.bmWidth;
const int badgeHeight = badgeBmp.bmHeight;
// 计算徽章位置（右上角）
//const int badgeX = std::max(0, baseWidth - badgeWidth);
//const int badgeY = 0;
const int badgeX = 16;
const int badgeY = 48;
// 创建32位ARGB兼容位图
HDC screenDC = GetDC(nullptr);
HDC memDC = CreateCompatibleDC(screenDC);
BITMAPINFO bmi = {0};
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biWidth = baseWidth;
bmi.bmiHeader.biHeight = -baseHeight; // 负值表示从上到下
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 32;
bmi.bmiHeader.biCompression = BI_RGB;
void* pixels = nullptr;
HBITMAP hCompositeBmp = CreateDIBSection(
memDC, &bmi, DIB_RGB_COLORS, &pixels, nullptr, 0);
HBITMAP hOldBmp = (HBITMAP)SelectObject(memDC, hCompositeBmp);
// 绘制原始图标（保留Alpha通道）
DrawIconEx(memDC, 0, 0, hOriginalIcon, baseWidth, baseHeight,
0, nullptr, DI_NORMAL);
// 绘制徽章图标（右上角，保留Alpha混合）
DrawIconEx(memDC, badgeX, badgeY, num, badgeWidth, badgeHeight,
0, nullptr, DI_NORMAL);
// 创建新图标
ICONINFO newIconInfo = {0};
newIconInfo.fIcon = TRUE;
newIconInfo.hbmColor = hCompositeBmp;
newIconInfo.hbmMask = CreateBitmap(baseWidth, baseHeight, 1, 1, nullptr);
HICON hCompositeIcon = CreateIconIndirect(&newIconInfo);
// 释放资源
SelectObject(memDC, hOldBmp);
DeleteObject(hCompositeBmp);
DeleteObject(newIconInfo.hbmMask);
DeleteDC(memDC);
ReleaseDC(nullptr, screenDC);
DeleteObject(originalInfo.hbmColor);
DeleteObject(originalInfo.hbmMask);
DeleteObject(badgeInfo.hbmColor);
DeleteObject(badgeInfo.hbmMask);
return hCompositeIcon;
}
新增函数3：调节ico尺寸大小：
HICON ResizeIconTo(HICON hOriginalIcon, int width) {
ICONINFO original_info = {0};
if (!GetIconInfo(hOriginalIcon, &original_info)) {
return nullptr;
}
// 获取原始尺寸
BITMAP color_bmp = {0};
GetObject(original_info.hbmColor, sizeof(BITMAP), &color_bmp);
// const int orig_width = color_bmp.bmWidth;
// const int orig_height = color_bmp.bmHeight;
HDC screen_dc = ::GetDC(nullptr);
HDC target_dc = ::CreateCompatibleDC(screen_dc);
BITMAPINFO bmi = {0};
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biWidth = width;
bmi.bmiHeader.biHeight = -width; // Top-down
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 32;
void* pixels;
HBITMAP target_bmp = CreateDIBSection(target_dc, &bmi, DIB_RGB_COLORS, &pixels, 0, 0);
//HBITMAP target_bmp = ::CreateCompatibleBitmap(screen_dc, width, width);
HBITMAP old_bmp = (HBITMAP)::SelectObject(target_dc, target_bmp);
// 透明背景填充（可选）
RECT rect = {0, 0, width, width};
::FillRect(target_dc, &rect, (HBRUSH)GetStockObject(WHITE_BRUSH));
// 高质量缩放绘制
::DrawIconEx(
target_dc, 0, 0, hOriginalIcon,
width, width, 0, nullptr, DI_NORMAL);
// 创建掩码（单色位图）
HBITMAP mask_bmp = ::CreateBitmap(width, width, 1, 1, nullptr);
ICONINFO new_info = {0};
new_info.fIcon = TRUE; // 图标（非光标）
new_info.hbmColor = target_bmp; // 颜色位图
new_info.hbmMask = mask_bmp; // 掩码位图
HICON new_icon = ::CreateIconIndirect(&new_info);
// 清理资源
::SelectObject(target_dc, old_bmp);
::DeleteObject(target_bmp);
::DeleteObject(mask_bmp);
::DeleteDC(target_dc);
::ReleaseDC(nullptr, screen_dc);
::DeleteObject(original_info.hbmColor);
::DeleteObject(original_info.hbmMask);
return new_icon;
}
3.找到函数：
HICON GetAppIcon() {
// TODO(mgiuca): Use GetAppIconImageFamily/CreateExact instead of LoadIcon, to
// get correct scaling. (See http://crbug.com/551256)
const int icon_id = GetAppIconResourceId();
// HICON returned from LoadIcon do not leak and do not have to be destroyed.
return LoadIcon(GetModuleHandle(chrome::kBrowserResourcesDll),
MAKEINTRESOURCE(icon_id));
这个函数就是载入任务栏图标icon的函数，感兴趣的小伙伴可以在这里修改，替换ico图片。
4.替换为：
HICON GetAppIcon() {
// TODO(mgiuca): Use GetAppIconImageFamily/CreateExact instead of LoadIcon, to
// get correct scaling. (See http://crbug.com/551256)
const int icon_id = GetAppIconResourceId();
// HICON returned from LoadIcon do not leak and do not have to be destroyed.
// 开始追加 ============================
base::CommandLine* base_command_line = base::CommandLine::ForCurrentProcess();
//std::string type = base_command_line->GetSwitchValueASCII("type");
//std::cerr << "=========== type ===========: "<<type << std::endl;
if (base_command_line->HasSwitch("notice-number")) {
int notice_number = 0;
std::istringstream(base_command_line->GetSwitchValueASCII("notice-number")) >> notice_number;
std::cerr << "=========== set icon ===========: " << std::endl;
HICON resp = LoadIcon(GetModuleHandle(chrome::kBrowserResourcesDll), MAKEINTRESOURCE(icon_id));
HICON num = CreateNumberIcon(notice_number, 64);
resp = ResizeIconTo(resp, 96);
resp = CombineIconWithBadge(resp, num);
return resp;
}
// 结束追加 ============================
return LoadIcon(GetModuleHandle(chrome::kBrowserResourcesDll),
MAKEINTRESOURCE(icon_id));
}
5.编译
ninja -C out/Default chrome
四、感想
之前记录了一种方法：任务栏图标右上角加提示徽章，是通过找到当前窗口句柄来做的，感兴趣的可以传送：https://blog.csdn.net/w1101662433/article/details/142182520发现越来越多的小伙伴的新博客，分享自己的创意，chromium编译圈子感觉越来越活跃了啊。
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