Release v0.6.20: edit history images and share smooth wheel handling

src/screenshot_notifications.cpp

@@ -112,6 +112,19 @@ std::wstring escapeXml(const std::wstring &s)
     return result;
 }
 }
+std::wstring cacheScreenshotForEditor(const Clip &clip)
+{
+    // Normalize PNG/DIBV5 and other supported clipboard images at full resolution.
+    auto pixels=decodeImage(clip);
+    if(pixels.bgra.empty() || pixels.bgra.size()>128*1024*1024-sizeof(BITMAPINFOHEADER))
+        throw std::runtime_error("Image is too large for the screenshot editor");
+    auto dib=imageDib(pixels);
+    auto directory=cacheDirectory(); cleanCache(directory);
+    GUID guid{}; check(CoCreateGuid(&guid)); wchar_t value[40]{}; StringFromGUID2(guid,value,40);
+    std::wstring id(value+1,36);
+    atomicWrite(directory/(id+L".capture"),protect(dib.data));
+    return id;
+}
 Clip loadNotifiedScreenshot(const std::wstring &id)
 {
     if(!validScreenshotToken(id)) throw std::runtime_error("Invalid screenshot notification");