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Preserve transparency when copying a DIB to/from the clipboard.

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In order to get the alpha channel when encoding BMP images from a
surface, we need to supply bmp=32 in the encoder options.
This commit is contained in:
wolfbeast 2019-02-14 22:42:55 +01:00 • committed by Roy Tam
commit 5f10407c8c
1 changed files with 2 additions and 2 deletions
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4
widget/windows/nsDataObj.cpp
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@ -921,7 +921,7 @@ nsDataObj::GetDib(const nsACString& inFlavor,
if ( image ) {
nsCOMPtr<imgITools> imgTools = do_CreateInstance("@mozilla.org/image/tools;1");
nsAutoString options;
nsAutoString options(NS_LITERAL_STRING("bpp=32;"));
if (aFormat.cfFormat == CF_DIBV5) {
options.AppendLiteral("version=5");
} else {
@ -1581,7 +1581,7 @@ HRESULT nsDataObj::DropImage(FORMATETC& aFE, STGMEDIUM& aSTG)
nsCOMPtr<imgITools> imgTools = do_CreateInstance("@mozilla.org/image/tools;1");
nsCOMPtr<nsIInputStream> inputStream;
rv = imgTools->EncodeImage(image, NS_LITERAL_CSTRING(IMAGE_BMP),
NS_LITERAL_STRING("version=3"),
NS_LITERAL_STRING("bpp=32;version=3"),
getter_AddRefs(inputStream));
if (NS_FAILED(rv) || !inputStream) {
return E_FAIL;