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游戏图标支持彩色掩码图标 #956

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merged 2 commits into from
Jun 23, 2024
Merged

游戏图标支持彩色掩码图标 #956

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79432b5
feat: 游戏图标支持彩色掩码图标
Blinue Jun 23, 2024
03120e0
chore: 调整格式
Blinue Jun 23, 2024
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23 changes: 19 additions & 4 deletions src/Magpie.App/IconHelper.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -35,8 +35,7 @@ static bool CopyPixelsOfHBmp(HBITMAP hBmp, LONG width, LONG height, void* data)
}

static SoftwareBitmap HIcon2SoftwareBitmap(HICON hIcon) {
// 单色图标: 不处理
// 彩色掩码图标: 忽略掩码
// 支持彩色光标和彩色掩码图标，不支持单色图标

ICONINFO iconInfo{};
if (!GetIconInfo(hIcon, &iconInfo)) {
Expand All @@ -58,7 +57,7 @@ static SoftwareBitmap HIcon2SoftwareBitmap(HICON hIcon) {
{
BitmapBuffer buffer = bitmap.LockBuffer(BitmapBufferAccessMode::Write);
uint8_t* pixels = buffer.CreateReference().data();

if (!CopyPixelsOfHBmp(iconInfo.hbmColor, bmp.bmWidth, bmp.bmHeight, pixels)) {
return nullptr;
}
Expand All @@ -84,8 +83,24 @@ static SoftwareBitmap HIcon2SoftwareBitmap(HICON hIcon) {
pixels[i + 1] = (uint8_t)std::lroundf(pixels[i + 1] * alpha);
pixels[i + 2] = (uint8_t)std::lroundf(pixels[i + 2] * alpha);
}
} else {
} else if (iconInfo.hbmMask) {
// 彩色掩码图标
std::unique_ptr<uint8_t[]> maskData = std::make_unique<uint8_t[]>(pixelsSize);
if (!CopyPixelsOfHBmp(iconInfo.hbmMask, bmp.bmWidth, bmp.bmHeight, maskData.get())) {
return nullptr;
}

for (uint32_t i = 0; i < pixelsSize; i += 4) {
// hbmMask 表示是否应用掩码
// 如果需要应用掩码而掩码不为零，那么这个图标无法转换为彩色图标，这种情况下直接忽略掩码
if (maskData[i] != 0 && pixels[i] == 0 && pixels[i + 1] == 0 && pixels[i + 2] == 0) {
// 掩码全为 0 表示透明像素
std::memset(pixels + i, 0, 4);
} else {
pixels[i + 3] = 255;
}
}
} else {
for (uint32_t i = 3; i < pixelsSize; i += 4) {
pixels[i] = 255;
}
Expand Down