From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 26 Sep 2024 09:20:54 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1stio1-002ueu-0Q for lore@lore.pengutronix.de; Thu, 26 Sep 2024 09:20:54 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1stio1-0003Bc-Ls for lore@pengutronix.de; Thu, 26 Sep 2024 09:20:54 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=dHqFRd5ONfc4Fumj4eIcWk7T+52ORxkTMGpgeRcih+4=; b=PxfHP5MD1jaObZvKtjKy+dKBGs jpqH5WlNJj0bq4Y+9JG1oSXvZ2LANSDkmArTw/cxOgemwf36bedmefvu7FKyRM+1ddC4D3YTv1TTE oj5LFkRn83UQrHH6GsCEfpdzZNJDpPXyLSZ8QTaDJK2vciBESEYf629uTk0ByfgfkoVJyy2qvcz6l M2CP5fpUUjVd6nDeQNj7LzejWhW5TPW/bzX4/bP9Vl3xQ1g/VhS9rbXMBoGcKnkls9cg9FOmHA8cV ynRk3UU4BfCKc3awGiMR5gAhpZYG2TQqNOK/SQeUwx0gI/RRIXzJQ4yY1Bb1RJuaYRS+XVDN0a4eK zXECPs1g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1stinX-00000007UBz-1kaT; Thu, 26 Sep 2024 07:20:23 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1stiWO-00000007QwH-3QFY for barebox@lists.infradead.org; Thu, 26 Sep 2024 07:02:42 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1stiWN-0002Wp-78; Thu, 26 Sep 2024 09:02:39 +0200 Received: from [2a0a:edc0:2:b01:1d::c5] (helo=pty.whiteo.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1stiWM-001cyf-R2; Thu, 26 Sep 2024 09:02:38 +0200 Received: from sha by pty.whiteo.stw.pengutronix.de with local (Exim 4.96) (envelope-from ) id 1stiWM-00D6r1-2R; Thu, 26 Sep 2024 09:02:38 +0200 Date: Thu, 26 Sep 2024 09:02:38 +0200 From: Sascha Hauer To: Ahmad Fatoum Cc: "open list:BAREBOX" Message-ID: References: <20240925-graphics-v1-0-f1fe5d2cceec@pengutronix.de> <20240925-graphics-v1-4-f1fe5d2cceec@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240926_000240_886327_9ED880A2 X-CRM114-Status: GOOD ( 16.11 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.0 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH 4/5] fbconsole: make background pixels transparent X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) On Thu, Sep 26, 2024 at 07:38:23AM +0200, Ahmad Fatoum wrote: > On 25.09.24 16:34, Sascha Hauer wrote: > > When we have a background image we want the background to actually shine > > through, so set the alpha value of the background to transparent and not > > opaque. > > > > Signed-off-by: Sascha Hauer > > Reviewed-by: Ahmad Fatoum > > I wonder if this could cause a slow down for framebuffers with no alpha channel, > because it will read the framebuffer on every pixel write for alpha blending > purposes, even if ultimately unnecessary? A pixel is drawn with gu_set_pixel() which doesn't read at all. Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |