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hakorune/examples/test_icon_extraction.rs

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// Windows Icon Extraction Test
// アイコンを実際に取得してICOファイルとして保存するテスト
#[cfg(windows)]
use windows::{
core::*,
Win32::{Graphics::Gdi::*, Storage::FileSystem::*, UI::Shell::*, UI::WindowsAndMessaging::*},
};
fn main() {
#[cfg(windows)]
unsafe {
println!("Windows Icon Extraction Test");
// C:ドライブのアイコンを取得
let drive_path = "C:\\";
let drive_path_wide: Vec<u16> = drive_path
.encode_utf16()
.chain(std::iter::once(0))
.collect();
let mut shfi = SHFILEINFOW::default();
let result = SHGetFileInfoW(
PCWSTR::from_raw(drive_path_wide.as_ptr()),
FILE_ATTRIBUTE_NORMAL,
Some(&mut shfi),
std::mem::size_of::<SHFILEINFOW>() as u32,
SHGFI_ICON | SHGFI_LARGEICON | SHGFI_USEFILEATTRIBUTES,
);
println!("SHGetFileInfoW result: {}", result);
if result != 0 && !shfi.hIcon.is_invalid() {
println!("Icon handle obtained!");
// アイコン情報を取得
let mut icon_info = ICONINFO::default();
if GetIconInfo(shfi.hIcon, &mut icon_info).is_ok() {
println!("GetIconInfo success!");
println!("fIcon: {}", icon_info.fIcon.as_bool());
// ビットマップ情報を取得
if !icon_info.hbmColor.is_invalid() {
println!("Color bitmap handle obtained!");
// ビットマップ情報を取得
let mut bitmap = BITMAP::default();
let size = GetObjectW(
icon_info.hbmColor.into(),
std::mem::size_of::<BITMAP>() as i32,
Some(&mut bitmap as *mut _ as *mut _),
);
if size > 0 {
println!("Bitmap info:");
println!(" Width: {}", bitmap.bmWidth);
println!(" Height: {}", bitmap.bmHeight);
println!(" Bits per pixel: {}", bitmap.bmBitsPixel);
println!(" Planes: {}", bitmap.bmPlanes);
// ピクセルデータを取得
let pixel_count = (bitmap.bmWidth * bitmap.bmHeight) as usize;
let bytes_per_pixel = (bitmap.bmBitsPixel / 8) as usize;
let mut pixels = vec![0u8; pixel_count * bytes_per_pixel];
let copied = GetBitmapBits(
icon_info.hbmColor,
pixels.len() as i32,
pixels.as_mut_ptr() as *mut _,
);
println!("Copied {} bytes of pixel data", copied);
// 簡易的にBMPファイルとして保存
if copied > 0 {
save_as_bmp(
"c_drive_icon.bmp",
&pixels,
bitmap.bmWidth,
bitmap.bmHeight,
bitmap.bmBitsPixel,
);
println!("Saved as c_drive_icon.bmp");
}
}
// ビットマップを削除
let _ = DeleteObject(icon_info.hbmColor.into());
}
if !icon_info.hbmMask.is_invalid() {
println!("Mask bitmap handle obtained!");
let _ = DeleteObject(icon_info.hbmMask.into());
}
}
// アイコンを破棄
let _ = DestroyIcon(shfi.hIcon);
} else {
println!("Failed to get icon");
}
}
#[cfg(not(windows))]
println!("This test only works on Windows");
}
#[cfg(windows)]
fn save_as_bmp(filename: &str, pixels: &[u8], width: i32, height: i32, bits_per_pixel: u16) {
use std::fs::File;
use std::io::Write;
// 簡易BMPヘッダー実際の実装はもっと複雑
let file_size = 54 + pixels.len() as u32;
let mut file = File::create(filename).unwrap();
// BMPファイルヘッダー
file.write_all(b"BM").unwrap(); // マジックナンバー
file.write_all(&file_size.to_le_bytes()).unwrap();
file.write_all(&0u32.to_le_bytes()).unwrap(); // 予約
file.write_all(&54u32.to_le_bytes()).unwrap(); // データオフセット
// BMPインフォヘッダー
file.write_all(&40u32.to_le_bytes()).unwrap(); // ヘッダーサイズ
file.write_all(&width.to_le_bytes()).unwrap();
file.write_all(&height.to_le_bytes()).unwrap();
file.write_all(&1u16.to_le_bytes()).unwrap(); // プレーン数
file.write_all(&bits_per_pixel.to_le_bytes()).unwrap();
file.write_all(&0u32.to_le_bytes()).unwrap(); // 圧縮なし
file.write_all(&(pixels.len() as u32).to_le_bytes())
.unwrap();
file.write_all(&0i32.to_le_bytes()).unwrap(); // X解像度
file.write_all(&0i32.to_le_bytes()).unwrap(); // Y解像度
file.write_all(&0u32.to_le_bytes()).unwrap(); // カラーテーブル数
file.write_all(&0u32.to_le_bytes()).unwrap(); // 重要な色数
// ピクセルデータ
file.write_all(pixels).unwrap();
println!("BMP file saved: {}", filename);
}