Received: (at 77104) by debbugs.gnu.org; 19 Mar 2025 20:45:49 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Mar 19 16:45:49 2025 Received: from localhost ([127.0.0.1]:53360 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1tv0IP-00030W-GK for submit <at> debbugs.gnu.org; Wed, 19 Mar 2025 16:45:49 -0400 Received: from dane.soverin.net ([185.233.34.37]:48619) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from <alan@HIDDEN>) id 1tv0IL-00030A-Rd for 77104 <at> debbugs.gnu.org; Wed, 19 Mar 2025 16:45:47 -0400 Received: from smtp.soverin.net (unknown [10.10.4.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by dane.soverin.net (Postfix) with ESMTPS id 4ZJ11v5xn7z17qM; Wed, 19 Mar 2025 20:45:39 +0000 (UTC) Received: from smtp.soverin.net (smtp.soverin.net [10.10.4.99]) by soverin.net (Postfix) with ESMTPSA id 4ZJ11v2Nhqz9f; Wed, 19 Mar 2025 20:45:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=idiocy.org; s=soverin; t=1742417139; bh=nqF7Cl6Ld1lgNNNSof7SHGvOUQGwO6qrPciY9q7tqvk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=kkNYnMSSZ/1PtRmnMJa+7m5N/CO4aJe8buI1u9rP0261pgI47ZOODIzjHDIs4Pd9Y IRSwvIEf+VPWnCNXi8UdpngqINOp5NJjjjLlvGTZqjkydYzHdTZmElneeEE++atVOz RjBtxakTdzfBuhj0zmyILd54radC3wwNp+3Lc6CNwm+BuqAEN+rwZY6uiJ33gOwXC9 0yU8/s9i/HecwrdV2sC33kR981zq1U5y1mtiUYs9PUdmK6hbBLm2v/b4zBvmOJ6yFH EmrQyfRVx8/NL6c1bb0VR15I+BX5VJSpYPqlwz6vtJ57j4LahQPmWJcXQCDMHZx4nK vle1vXejJ1mQw== X-CM-Analysis: v=2.4 cv=I7afRMgg c=1 sm=1 tr=0 ts=67db2cf3 a=JQ/4M/eHZ1xGgmq+/0o6yg==:117 a=JQ/4M/eHZ1xGgmq+/0o6yg==:17 a=kj9zAlcOel0A:10 a=hIj89exaAAAA:8 a=ScbQDqAzqbG1if46IykA:9 a=CjuIK1q_8ugA:10 a=lS9wXHQM5UdnNJ4u63Ry:22 X-CM-Envelope: MS4xfKtqpnTCs7P7CJOGXOsFIUcUNusdioQGdQLlsmPupXg5+dSS9ZCZnKubCCrf98Pc0XWqD2oGkUd8ubXjM1SNU9Kt34+zkOdsOuGaIc3gcVpDzZqaJLZy xGqAMffu2rQLgICMijkqcQoFaWPj3rPr85H7XT6PCVodvVitKg7QkWqTtnTbwRrBAZC/NoqFlaVDXilryRqDw5GDj6EFXHDEOxHosyJWewODiafKS0t+SRM3 geazq3d0dT7sF7nctI1oj2f0vh410Nd5vZwDIlAODk6UaubvztsvEC4sJxmL4gR2 Date: Wed, 19 Mar 2025 20:45:37 +0000 From: Alan Third <alan@HIDDEN> To: Ihor Radchenko <yantar92@HIDDEN> Subject: Re: bug#77104: 31.0.50; Transparent png image background is ignored in frames with alpha-background Message-ID: <Z9ss8cHNirozObRl@HIDDEN> Mail-Followup-To: Alan Third <alan@HIDDEN>, Ihor Radchenko <yantar92@HIDDEN>, Po Lu <luangruo@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>, 77104 <at> debbugs.gnu.org, dybfysiat@HIDDEN References: <87h63q9pxw.fsf@localhost> <86v7s5p68r.fsf@HIDDEN> <87v7s5w4ow.fsf@HIDDEN> <Z9rvkAsVOTM8w0OL@HIDDEN> <87msdh3qn6.fsf@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87msdh3qn6.fsf@localhost> X-Spampanel-Class: ham X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 77104 Cc: Po Lu <luangruo@HIDDEN>, dybfysiat@HIDDEN, Eli Zaretskii <eliz@HIDDEN>, 77104 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) On Wed, Mar 19, 2025 at 04:57:01PM +0000, Ihor Radchenko wrote: > Alan Third <alan@HIDDEN> writes: > > > I think the problem is that Emacs has never handled image > > transparency, so it sets the transparent pixels of the image to the > > frame's background colour. There's quite a bit of fiddling to manage > > this with changing backgrounds and so on. > > > > I'm not sure what would be required for drawing transparent images to > > the glass. On NS I think it would be near trivial as the toolkit will > > handle it for us, but I don't know about others. For example I have a > > memory of being told that some terms don't clear under images so > > drawing a transparent image might show the previous pixels. > > Then, how does :mask 'heuristic works? It somehow manages to set certain > pixels to be truly transparent. If so, why is it a problem setting > pixels that have transparent color in the image truly transparent in > exactly the same way? As I recall on X it uses a mask, so there's a second image that has the transparent pixels marked (so probably a one bit bitmap) and the image drawing function only draws the corresponding non-transparent pixels from the main image. Other terms may work differently. I don't think NS has native support for masking bitmaps, for example. I can't remember how we work around that. -- Alan Third
bug-gnu-emacs@HIDDEN:bug#77104; Package emacs.
Full text available.Received: (at 77104) by debbugs.gnu.org; 19 Mar 2025 17:03:05 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Mar 19 13:03:05 2025 Received: from localhost ([127.0.0.1]:52882 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1tuwoq-0005ic-Bh for submit <at> debbugs.gnu.org; Wed, 19 Mar 2025 13:03:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52596) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1tuwol-0005gt-PQ for 77104 <at> debbugs.gnu.org; Wed, 19 Mar 2025 13:03:00 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1tuwof-0007Xq-1e; Wed, 19 Mar 2025 13:02:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=xgO1V3morKVGK/aSjSSewoXMZAy9zlhP7c3GGg1ZEFs=; b=VEHT5jKni7d8 9qYHIo4Gh1siZ9GD3Kpg39g7W4Z4cnIYBr/Lj6zANCr7wg0HKRO4rClfMopJRwUEUc1zJQRXNIK1B +QySb3UVA4rMqsCAsJiSFRS8rwvNjEEvjKH6EFD4KWsbNkGTWjlw4eYSjrktaBqRyC2nMwP1p+qmq zAccgFYbfCZWt0gJTStLF5U1FolQXTS1IgWOxgtMfmfDNjcN2JNCH4daSK66enj/Wgqg0lRsNzy0x Yv1MFW0frqeQ5v+uN52s/6OpGITzZAlo+RpoK2NwJcDOVm5fy98wOWtx5u13vAz2n+H/2MX46zObi iAODtUvSdTrQEj2+crSQ3A==; Date: Wed, 19 Mar 2025 19:02:44 +0200 Message-Id: <8634f9oswb.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Alan Third <alan@HIDDEN> In-Reply-To: <Z9rvkAsVOTM8w0OL@HIDDEN> (message from Alan Third on Wed, 19 Mar 2025 16:23:44 +0000) Subject: Re: bug#77104: 31.0.50; Transparent png image background is ignored in frames with alpha-background References: <87h63q9pxw.fsf@localhost> <86v7s5p68r.fsf@HIDDEN> <87v7s5w4ow.fsf@HIDDEN> <Z9rvkAsVOTM8w0OL@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77104 Cc: luangruo@HIDDEN, dybfysiat@HIDDEN, alan@HIDDEN, 77104 <at> debbugs.gnu.org, yantar92@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > Date: Wed, 19 Mar 2025 16:23:44 +0000 > From: Alan Third <alan@HIDDEN> > Cc: Eli Zaretskii <eliz@HIDDEN>, Ihor Radchenko <yantar92@HIDDEN>, > 77104 <at> debbugs.gnu.org, dybfysiat@HIDDEN > > On Wed, Mar 19, 2025 at 09:06:07PM +0800, Po Lu wrote: > > Eli Zaretskii <eliz@HIDDEN> writes: > > > > > Po Lu and Alan, is this a bug or a missing feature? > > > > I'm tending towards "bug", but only Alan can be sure. > > I'd lean more towards missing feature, but it's a toss up really. > > I think the problem is that Emacs has never handled image > transparency, so it sets the transparent pixels of the image to the > frame's background colour. That's what I thought, indeed. > There's quite a bit of fiddling to manage this with changing > backgrounds and so on. > > I'm not sure what would be required for drawing transparent images to > the glass. On NS I think it would be near trivial as the toolkit will > handle it for us, but I don't know about others. For example I have a > memory of being told that some terms don't clear under images so > drawing a transparent image might show the previous pixels. Patches welcome.
bug-gnu-emacs@HIDDEN:bug#77104; Package emacs.
Full text available.Received: (at 77104) by debbugs.gnu.org; 19 Mar 2025 16:57:52 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Mar 19 12:57:52 2025 Received: from localhost ([127.0.0.1]:52855 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1tuwjn-0005Q4-Do for submit <at> debbugs.gnu.org; Wed, 19 Mar 2025 12:57:51 -0400 Received: from mout02.posteo.de ([185.67.36.66]:52915) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <yantar92@HIDDEN>) id 1tuwjj-0005Pl-Fc for 77104 <at> debbugs.gnu.org; Wed, 19 Mar 2025 12:57:49 -0400 Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id 41370240101 for <77104 <at> debbugs.gnu.org>; Wed, 19 Mar 2025 17:57:41 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1742403461; bh=lxb809pVZTQi8CC3UfPJSu0JthndpfT9+zh4sTYvzBk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type: From; b=pfvr2vGpWnE5e36SNRXXJDbtS1uT0UjNJyZoKeDPcjlDM+aSTMfxGuUyzUoI/lnp4 QDV13ZTbQHGIkALtdb3K+3FaTAXH58EEPlWGCYA6uzH2qEB2xi6cEdGsr4tiHrJw6n b+DhUudkNfKrAZfCORrt8UvWNINqtXdQT15JvEyu1O09g/tCnxCUX5fClN3m1yhEk3 50/ek0Wljd1SWAW/ED94B8msgRebU23vEKOUm1tvpzHgTXpVHmDYLd1uXW5aCMiwzF 1hd5EqBBu5hPvWWCa+S/CCiyfB4UKdGl+nIAw48ROM8TuwvC4IbJrJPThhXztPZEVH McDU1Z3q/DrWg== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4ZHvyr1w1Kz6tvk; Wed, 19 Mar 2025 17:57:40 +0100 (CET) From: Ihor Radchenko <yantar92@HIDDEN> To: Alan Third <alan@HIDDEN> Subject: Re: bug#77104: 31.0.50; Transparent png image background is ignored in frames with alpha-background In-Reply-To: <Z9rvkAsVOTM8w0OL@HIDDEN> References: <87h63q9pxw.fsf@localhost> <86v7s5p68r.fsf@HIDDEN> <87v7s5w4ow.fsf@HIDDEN> <Z9rvkAsVOTM8w0OL@HIDDEN> Date: Wed, 19 Mar 2025 16:57:01 +0000 Message-ID: <87msdh3qn6.fsf@localhost> MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77104 Cc: Po Lu <luangruo@HIDDEN>, dybfysiat@HIDDEN, Eli Zaretskii <eliz@HIDDEN>, 77104 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) Alan Third <alan@HIDDEN> writes: > I think the problem is that Emacs has never handled image > transparency, so it sets the transparent pixels of the image to the > frame's background colour. There's quite a bit of fiddling to manage > this with changing backgrounds and so on. > > I'm not sure what would be required for drawing transparent images to > the glass. On NS I think it would be near trivial as the toolkit will > handle it for us, but I don't know about others. For example I have a > memory of being told that some terms don't clear under images so > drawing a transparent image might show the previous pixels. Then, how does :mask 'heuristic works? It somehow manages to set certain pixels to be truly transparent. If so, why is it a problem setting pixels that have transparent color in the image truly transparent in exactly the same way? -- Ihor Radchenko // yantar92, Org mode maintainer, Learn more about Org mode at <https://orgmode.org/>. Support Org development at <https://liberapay.com/org-mode>, or support my work at <https://liberapay.com/yantar92>
bug-gnu-emacs@HIDDEN:bug#77104; Package emacs.
Full text available.Received: (at 77104) by debbugs.gnu.org; 19 Mar 2025 16:24:02 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Mar 19 12:24:02 2025 Received: from localhost ([127.0.0.1]:52660 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1tuwD3-0006ws-Mc for submit <at> debbugs.gnu.org; Wed, 19 Mar 2025 12:24:02 -0400 Received: from dane.soverin.net ([2a10:de80:1:4092:b9e9:229d:0:1]:48953) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from <alan@HIDDEN>) id 1tuwCw-0006uJ-Ph for 77104 <at> debbugs.gnu.org; Wed, 19 Mar 2025 12:23:56 -0400 Received: from smtp.soverin.net (c04smtp-lb01.int.sover.in [10.10.4.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by dane.soverin.net (Postfix) with ESMTPS id 4ZHvCj6JrZzygc; Wed, 19 Mar 2025 16:23:45 +0000 (UTC) Received: from smtp.soverin.net (smtp.soverin.net [10.10.4.99]) by soverin.net (Postfix) with ESMTPSA id 4ZHvCj3F46z9f; Wed, 19 Mar 2025 16:23:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=idiocy.org; s=soverin; t=1742401425; bh=p7YOo/bV1QB8VKCRukgT1pWOtPZ9OsgoPfU2hPI6DWM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ZQzSjz0WFlmYlSK6uUEcfsuinK1COPczp4SBx+R5ft3DwgO/Z23z5Tzg1eEvTBjnm zAsd3XCnBz7qPGXlp1tFCxBn98Hgqs8DfdMez6juwDy3amWRvS53bB5O+2su/T7LPr 5PRJgJ9gnNjUImp4ouERq7dPsCUpSs7Bi0BC5deXRRH6EdzciXfk17K7amPHiujSBO WRbYeg3BsRTRAJMYb2n9ju7+FBUm0VVYCwe+0WT3hzZ8U+MnRY40PfOCF7XYInivnN Qgfgzz4q249HrsWvf2xYR3/z6O/+7EczISTuPgmsuUuXpvXggtAygLBgSzwOMRmKhh YdDfl+EbQBecw== X-CM-Analysis: v=2.4 cv=I7afRMgg c=1 sm=1 tr=0 ts=67daef91 a=h/5iclRcyR4WXIJfY+0Rnw==:117 a=h/5iclRcyR4WXIJfY+0Rnw==:17 a=kj9zAlcOel0A:10 a=mDV3o1hIAAAA:8 a=mCl8_4eRF2Wk1jT3ObMA:9 a=CjuIK1q_8ugA:10 X-CM-Envelope: MS4xfCrdMNLsh+e2BxwfivXh5D4lpXoRNhfw8wixsP+9sZ34C4DYSjrG9kmRLC4PXs7+RD7VsH4RlqZWu+2u1nx3DnK6sYJuVa/kzvjLwcIDHreA4f8E46VR NlfyuxnXx5heNL+OcimhXCcYZonsNgASBq4Lqayka6xUoAF9IDvXdeP0BtBiYpDOKt5NcSCVjX4+KrIhht9rEySxz3O8RIButoIxWyRBnmqyhw70TjN4sXMB kfeeErgVI9imvQGDcIZqKogFeNWbflr0BCXlnuZOxabNNdu/a3YnV2si933Yi7VV Date: Wed, 19 Mar 2025 16:23:44 +0000 From: Alan Third <alan@HIDDEN> To: Po Lu <luangruo@HIDDEN> Subject: Re: bug#77104: 31.0.50; Transparent png image background is ignored in frames with alpha-background Message-ID: <Z9rvkAsVOTM8w0OL@HIDDEN> Mail-Followup-To: Alan Third <alan@HIDDEN>, Po Lu <luangruo@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>, Ihor Radchenko <yantar92@HIDDEN>, 77104 <at> debbugs.gnu.org, dybfysiat@HIDDEN References: <87h63q9pxw.fsf@localhost> <86v7s5p68r.fsf@HIDDEN> <87v7s5w4ow.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87v7s5w4ow.fsf@HIDDEN> X-Spampanel-Class: ham X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 77104 Cc: dybfysiat@HIDDEN, Eli Zaretskii <eliz@HIDDEN>, 77104 <at> debbugs.gnu.org, Ihor Radchenko <yantar92@HIDDEN> X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) On Wed, Mar 19, 2025 at 09:06:07PM +0800, Po Lu wrote: > Eli Zaretskii <eliz@HIDDEN> writes: > > > Po Lu and Alan, is this a bug or a missing feature? > > I'm tending towards "bug", but only Alan can be sure. I'd lean more towards missing feature, but it's a toss up really. I think the problem is that Emacs has never handled image transparency, so it sets the transparent pixels of the image to the frame's background colour. There's quite a bit of fiddling to manage this with changing backgrounds and so on. I'm not sure what would be required for drawing transparent images to the glass. On NS I think it would be near trivial as the toolkit will handle it for us, but I don't know about others. For example I have a memory of being told that some terms don't clear under images so drawing a transparent image might show the previous pixels. -- Alan Third
bug-gnu-emacs@HIDDEN:bug#77104; Package emacs.
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Hermes SMTP Server) with ESMTPA ID 0eb855f2e1890aadf0adb80113272c08; Wed, 19 Mar 2025 13:06:13 +0000 (UTC) From: Po Lu <luangruo@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#77104: 31.0.50; Transparent png image background is ignored in frames with alpha-background In-Reply-To: <86v7s5p68r.fsf@HIDDEN> References: <87h63q9pxw.fsf@localhost> <86v7s5p68r.fsf@HIDDEN> Date: Wed, 19 Mar 2025 21:06:07 +0800 Message-ID: <87v7s5w4ow.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Mailer: WebService/1.1.23435 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Content-Length: 147 X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 77104 Cc: dybfysiat@HIDDEN, Ihor Radchenko <yantar92@HIDDEN>, 77104 <at> debbugs.gnu.org, Alan Third <alan@HIDDEN> X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) Eli Zaretskii <eliz@HIDDEN> writes: > Po Lu and Alan, is this a bug or a missing feature? I'm tending towards "bug", but only Alan can be sure.
bug-gnu-emacs@HIDDEN:bug#77104; Package emacs.
Full text available.Received: (at 77104) by debbugs.gnu.org; 19 Mar 2025 12:15:28 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Mar 19 08:15:28 2025 Received: from localhost ([127.0.0.1]:49187 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1tusKW-00014d-AL for submit <at> debbugs.gnu.org; Wed, 19 Mar 2025 08:15:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33194) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1tusKS-00014K-Uj for 77104 <at> debbugs.gnu.org; Wed, 19 Mar 2025 08:15:26 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1tusKI-0007yw-8p; Wed, 19 Mar 2025 08:15:14 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=efeb+ZLUWxPBLiGtFj2gxENE6xzjkEVSV6w0jL4VSY4=; b=YT8f09ElN1/X xoGVepmp/qRoUtdb6ozqzh9rXuJZo6aOmjKStHWhiC7BWOR4Um1LvfW6xDU6hHMXx+9Tw/cVVdUML ePlSer4vbKN47V9wQyyTG77q70fdSyXmZm22pq35DCLyAEfAZUedTctKi1vVlc7eBYiC24yQ53BDT lFx0AGWF5rsfPAbpvjBsfU4M3c+mSWviaBzYl+bUm3Bh1hSfawLAzMUUPEZKa9UCSYv0zC9aWZpjJ zdDRVAXh4JutTg0+MvHmeb0/JbD57wWpW4xKy3yyLatqA0GXyspDyqLVUiaJf4uEc8L7p+JhCW9Az rehyo2FIxkB6mx/7w4dJuA==; Date: Wed, 19 Mar 2025 14:14:28 +0200 Message-Id: <86v7s5p68r.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Ihor Radchenko <yantar92@HIDDEN>, Po Lu <luangruo@HIDDEN>, Alan Third <alan@HIDDEN> In-Reply-To: <87h63q9pxw.fsf@localhost> (message from Ihor Radchenko on Tue, 18 Mar 2025 18:03:23 +0000) Subject: Re: bug#77104: 31.0.50; Transparent png image background is ignored in frames with alpha-background References: <87h63q9pxw.fsf@localhost> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77104 Cc: dybfysiat@HIDDEN, 77104 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > Cc: gynamics <dybfysiat@HIDDEN> > From: Ihor Radchenko <yantar92@HIDDEN> > Date: Tue, 18 Mar 2025 18:03:23 +0000 > > Try the following starting from emacs -Q + the attached .png file: > > 1. > > (let ((ov (make-overlay 1 10))) > (set-frame-parameter nil 'alpha-background 90) > (overlay-put > ov > 'display > (create-image > "/path/to/image.png" > nil nil :width 100))) > > 2. Observe image background not being transparent, but instead using > default face background. > > 3. > > (let ((ov (make-overlay 1 10))) > (set-frame-parameter nil 'alpha-background 90) > (overlay-put > ov > 'display > (create-image > "/path/to/image.png" > nil nil :width 100 :mask 'heuristic))) > > 4. With :mask 'heuristic, the background becomes transparent (mod > "rough" edges due to clipping) > > I believe that (1) is a bug. > > See also https://list.orgmode.org/orgmode/7324dc0.f8517.195a224ffd1.Coremail.dybfysiat@HIDDEN/ Po Lu and Alan, is this a bug or a missing feature?
bug-gnu-emacs@HIDDEN:bug#77104; Package emacs.
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From: Ihor Radchenko <yantar92@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 31.0.50; Transparent png image background is ignored in frames with
alpha-background
X-Debbugs-Cc: gynamics <dybfysiat@HIDDEN>
Date: Tue, 18 Mar 2025 18:03:23 +0000
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--=-=-=
Content-Type: text/plain
Try the following starting from emacs -Q + the attached .png file:
1.
(let ((ov (make-overlay 1 10)))
(set-frame-parameter nil 'alpha-background 90)
(overlay-put
ov
'display
(create-image
"/path/to/image.png"
nil nil :width 100)))
2. Observe image background not being transparent, but instead using
default face background.
3.
(let ((ov (make-overlay 1 10)))
(set-frame-parameter nil 'alpha-background 90)
(overlay-put
ov
'display
(create-image
"/path/to/image.png"
nil nil :width 100 :mask 'heuristic)))
4. With :mask 'heuristic, the background becomes transparent (mod
"rough" edges due to clipping)
I believe that (1) is a bug.
See also https://list.orgmode.org/orgmode/7324dc0.f8517.195a224ffd1.Coremail.dybfysiat@HIDDEN/
--=-=-=
Content-Type: image/png
Content-Disposition: attachment; filename=image.png
Content-Transfer-Encoding: base64
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gg==
--=-=-=
Content-Type: text/plain
In GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.42, cairo version 1.18.2) of 2025-03-16 built on localhost
Repository revision: 52879c61e961cac71e7bb0ba12b73f6dd4f28877
Repository branch: scratch/markers-as-gap-array
Windowing system distributor 'The X.Org Foundation', version 11.0.12101014
System Description: Gentoo Linux
Configured using:
'configure --with-tree-sitter --with-native-compilation 'CFLAGS=-g3
-I/opt/mps/include -L/opt/mps/lib'
JAVAC=/etc/java-config-2/current-system-vm/bin/javac
PKG_CONFIG_PATH=/usr/share/guile-data/3.0/pkgconfig'
Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG
LCMS2 LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG
SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER WEBP
X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB
--
Ihor Radchenko // yantar92,
Org mode maintainer,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>
--=-=-=--
Ihor Radchenko <yantar92@HIDDEN>:dybfysiat@HIDDEN, bug-gnu-emacs@HIDDEN.
Full text available.dybfysiat@HIDDEN, bug-gnu-emacs@HIDDEN:bug#77104; Package emacs.
Full text available.
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