[{"id":39385,"web_url":"https://patchwork.libcamera.org/comment/39385/","msgid":"<9a700746-ddf0-4075-b96d-9d8552607315@collabora.com>","date":"2026-06-24T12:14:15","subject":"Re: [PATCH 06/10] libcamera: egl: Add updateInputTexture2D","submitter":{"id":140,"url":"https://patchwork.libcamera.org/api/people/140/","name":"Robert Mader","email":"robert.mader@collabora.com"},"content":"On 24.06.26 10:58, Bryan O'Donoghue wrote:\n> The internet box tells me that glTextSubImage2D lets us update a texture's\n> data only, instead of recreating the texture and uploading data.\n>\n> This is a smallish optimisation but we are hunting for every possible cycle\n> and watt so add the routine as precursor to using it in-place of\n> createTexture2D on every upload cycle.\n>\n> Signed-off-by: Bryan O'Donoghue \n> ---\n> include/libcamera/internal/egl.h | 1 +\n> src/libcamera/egl.cpp | 34 ++++++++++++++++++++++\n> src/libcamera/software_isp/debayer_egl.cpp | 2 +-\n> 3 files changed, 36 insertions(+), 1 deletion(-)\n>\n> diff --git a/include/libcamera/internal/egl.h b/include/libcamera/internal/egl.h\n> index b992baf25..f1fa75d96 100644\n> --- a/include/libcamera/internal/egl.h\n> +++ b/include/libcamera/internal/egl.h\n> @@ -108,6 +108,7 @@ public:\n> \tint createInputDMABufTexture2D(eGLImage &eglImage, int fd);\n> \tint createOutputDMABufTexture2D(eGLImage &eglImage, int fd);\n> \tvoid createInputTexture2D(eGLImage &eglImage, void *data);\n> +\tvoid updateInputTexture2D(eGLImage &eglImage, void *data);\n> \tvoid createOutputTexture2D(eGLImage &eglImage);\n> \n> \tint attachTextureToFBO(eGLImage &eglImage);\n> diff --git a/src/libcamera/egl.cpp b/src/libcamera/egl.cpp\n> index 123653b58..6134b05f9 100644\n> --- a/src/libcamera/egl.cpp\n> +++ b/src/libcamera/egl.cpp\n> @@ -345,6 +345,40 @@ bool eGL::isAvailable()\n> \treturn true;\n> }\n> \n> +/**\n> + * \\brief Update a 2D texture already created\n> + * \\param[in,out] eglImage EGL image to associate with the texture\n> + * \\param[data] Data to update the texture with\n> + *\n> + * Updates a 2D texture in VRAM.\n> + */\n> +void eGL::updateInputTexture2D(eGLImage &eglImage, void *data)\n> +{\n> +\tGLenum format;\n> +\tGLenum type = GL_UNSIGNED_BYTE;\n> +\n> +\tASSERT(tid_ == Thread::currentId());\n> +\n> +\tglActiveTexture(eglImage.texture_unit_);\n> +\tglBindTexture(GL_TEXTURE_2D, eglImage.texture_);\nThis one looks like it should get replaced in the next commit but \ndoesn't. Might want to switch those commits around and use \nactivateBindTexture() here.\n> +\n> +\tswitch (eglImage.format_) {\n> +\tcase GL_R16F:\n> +\t\tformat = GL_RED;\n> +\t\ttype = GL_HALF_FLOAT;\nAs mentioned previously I'd kinda prefer to keep the float parts to the \nmult-pass series.\n> +\t\tbreak;\n> +\tcase GL_RG8:\n> +\t\tformat = GL_RG;\n> +\t\tbreak;\n> +\tcase GL_LUMINANCE:\n> +\t\tformat = GL_LUMINANCE;\n> +\t\tbreak;\n> +\t}\n> +\n> +\t// Update an already exsiting texture\n> +\tglTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, eglImage.width_, eglImage.height_, format, type, data);\nYep, that seems to match what Weston and Mutter do AFAICT.\n> +}\n> +\n> /**\n> * \\brief Create a 2D texture attached to an FBO for render-to-texture\n> * \\param[in,out] eglImage EGL image to associate with the texture\n> diff --git a/src/libcamera/software_isp/debayer_egl.cpp b/src/libcamera/software_isp/debayer_egl.cpp\n> index 0ec2a98cf..cdceacf96 100644\n> --- a/src/libcamera/software_isp/debayer_egl.cpp\n> +++ b/src/libcamera/software_isp/debayer_egl.cpp\n> @@ -536,7 +536,7 @@ int DebayerEGL::debayerGPU(FrameBuffer *input, FrameBuffer *output, const Debaye\n> \t\t\tLOG(Debayer, Error) << \"mmap-ing buffer(s) failed\";\n> \t\t\treturn -ENODEV;\n> \t\t}\n> -\t\tegl_.createTexture2D(*eglImageBayerIn_, inMapped->value().planes()[0].data());\n> +\t\tegl_.createInputTexture2D(*eglImageBayerIn_, inMapped->value().planes()[0].data());\n\nThis looks like it went to the wrong commit.\n\nWith at least this one fixed:\n\nReviewed-by: Robert Mader \n\n> \t}\n> \n> \t/* Generate the output render framebuffer as render to texture */","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id C7A1EC3306\n\tfor ;\n\tWed, 24 Jun 2026 12:14:24 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id EE89D658AC;\n\tWed, 24 Jun 2026 14:14:23 +0200 (CEST)","from sender4-op-o12.zoho.com (sender4-op-o12.zoho.com\n\t[136.143.188.12])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id B20F365718\n\tfor ;\n\tWed, 24 Jun 2026 14:14:21 +0200 (CEST)","by mx.zohomail.com with SMTPS id 1782303257826236.9638246387526;\n\tWed, 24 Jun 2026 05:14:17 -0700 (PDT)"],"Authentication-Results":"lancelot.ideasonboard.com; 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a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1782303259;\n\ts=zohomail; d=collabora.com; i=robert.mader@collabora.com;\n\th=Message-ID:Date:Date:MIME-Version:Subject:Subject:To:To:References:From:From:In-Reply-To:Content-Type:Content-Transfer-Encoding:Message-Id:Reply-To:Cc;\n\tbh=FtrMHg7BuTeroit/rjMG3/Ngs0rOdNh9kUNhrHhlSg0=;\n\tb=fJTjn26PLmXJRuJSV3J8dd6l5zIrqE1Xa2TSVgjK6rVkn/NuB5uGjWi6ieDmIDb5\n\t7sVWL+wJal6PKk2TLMAZwBt1nWNTtHTwniKT5jtTNxak6AWqytTje9GRD/9tL2R7w2B\n\tBoMDbiBxn+tJ6C13S3q1B/MsnpwoqirKrmiDHemw=","Message-ID":"<9a700746-ddf0-4075-b96d-9d8552607315@collabora.com>","Date":"Wed, 24 Jun 2026 14:14:15 +0200","MIME-Version":"1.0","User-Agent":"Mozilla Thunderbird","Subject":"Re: [PATCH 06/10] libcamera: egl: Add updateInputTexture2D","To":"libcamera-devel@lists.libcamera.org","References":"<20260624085849.873784-1-bryan.odonoghue@linaro.org>\n\t<20260624085849.873784-7-bryan.odonoghue@linaro.org>","Content-Language":"en-US, de-DE, en-GB","From":"Robert Mader ","In-Reply-To":"<20260624085849.873784-7-bryan.odonoghue@linaro.org>","Content-Type":"text/plain; charset=UTF-8; format=flowed","Content-Transfer-Encoding":"7bit","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}},{"id":39420,"web_url":"https://patchwork.libcamera.org/comment/39420/","msgid":"<1065553f-1842-489a-83fa-7ebe7fdf108e@nxsw.ie>","date":"2026-06-25T22:29:12","subject":"Re: [PATCH 06/10] libcamera: egl: Add updateInputTexture2D","submitter":{"id":226,"url":"https://patchwork.libcamera.org/api/people/226/","name":"Bryan O'Donoghue","email":"bod.linux@nxsw.ie"},"content":"On 24/06/2026 13:14, Robert Mader wrote:\n>> +void eGL::updateInputTexture2D(eGLImage &eglImage, void *data)\n>> +{\n>> +\tGLenum format;\n>> +\tGLenum type = GL_UNSIGNED_BYTE;\n>> +\n>> +\tASSERT(tid_ == Thread::currentId());\n>> +\n>> +\tglActiveTexture(eglImage.texture_unit_);\n>> +\tglBindTexture(GL_TEXTURE_2D, eglImage.texture_);\n> This one looks like it should get replaced in the next commit but\n> doesn't.\n\nYep. Lazy rebase.\n\n---\nbod","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 54217C3264\n\tfor ;\n\tThu, 25 Jun 2026 22:29:18 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 6F971658D1;\n\tFri, 26 Jun 2026 00:29:17 +0200 (CEST)","from tor.source.kernel.org (tor.source.kernel.org\n\t[IPv6:2600:3c04:e001:324:0:1991:8:25])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id E7EDB623CB\n\tfor ;\n\tFri, 26 Jun 2026 00:29:15 +0200 (CEST)","from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18])\n\tby tor.source.kernel.org (Postfix) with ESMTP id B8B0460098\n\tfor ;\n\tThu, 25 Jun 2026 22:29:14 +0000 (UTC)","by smtp.kernel.org (Postfix) with ESMTPSA id 34FF31F000E9\n\tfor ;\n\tThu, 25 Jun 2026 22:29:14 +0000 (UTC)"],"Message-ID":"<1065553f-1842-489a-83fa-7ebe7fdf108e@nxsw.ie>","Date":"Thu, 25 Jun 2026 23:29:12 +0100","MIME-Version":"1.0","User-Agent":"Mozilla Thunderbird","Subject":"Re: [PATCH 06/10] libcamera: egl: Add updateInputTexture2D","To":"libcamera-devel@lists.libcamera.org","References":"<20260624085849.873784-1-bryan.odonoghue@linaro.org>\n\t<20260624085849.873784-7-bryan.odonoghue@linaro.org>\n\t\n\t<9a700746-ddf0-4075-b96d-9d8552607315@collabora.com>","From":"Bryan O'Donoghue ","Content-Language":"en-US","In-Reply-To":"<9a700746-ddf0-4075-b96d-9d8552607315@collabora.com>","Content-Type":"text/plain; charset=UTF-8; format=flowed","Content-Transfer-Encoding":"7bit","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}},{"id":39447,"web_url":"https://patchwork.libcamera.org/comment/39447/","msgid":"<85ik75lftz.fsf@mzamazal-thinkpadp1gen7.tpbc.csb>","date":"2026-06-26T11:08:08","subject":"Re: [PATCH 06/10] libcamera: egl: Add updateInputTexture2D","submitter":{"id":177,"url":"https://patchwork.libcamera.org/api/people/177/","name":"Milan Zamazal","email":"mzamazal@redhat.com"},"content":"Bryan O'Donoghue writes:\n\n> The internet box tells me that glTextSubImage2D lets us update a texture's\n> data only, instead of recreating the texture and uploading data.\n>\n> This is a smallish optimisation but we are hunting for every possible cycle\n> and watt so add the routine as precursor to using it in-place of\n> createTexture2D on every upload cycle.\n>\n> Signed-off-by: Bryan O'Donoghue \n> ---\n> include/libcamera/internal/egl.h | 1 +\n> src/libcamera/egl.cpp | 34 ++++++++++++++++++++++\n> src/libcamera/software_isp/debayer_egl.cpp | 2 +-\n> 3 files changed, 36 insertions(+), 1 deletion(-)\n>\n> diff --git a/include/libcamera/internal/egl.h b/include/libcamera/internal/egl.h\n> index b992baf25..f1fa75d96 100644\n> --- a/include/libcamera/internal/egl.h\n> +++ b/include/libcamera/internal/egl.h\n> @@ -108,6 +108,7 @@ public:\n> \tint createInputDMABufTexture2D(eGLImage &eglImage, int fd);\n> \tint createOutputDMABufTexture2D(eGLImage &eglImage, int fd);\n> \tvoid createInputTexture2D(eGLImage &eglImage, void *data);\n> +\tvoid updateInputTexture2D(eGLImage &eglImage, void *data);\n> \tvoid createOutputTexture2D(eGLImage &eglImage);\n> \n> \tint attachTextureToFBO(eGLImage &eglImage);\n> diff --git a/src/libcamera/egl.cpp b/src/libcamera/egl.cpp\n> index 123653b58..6134b05f9 100644\n> --- a/src/libcamera/egl.cpp\n> +++ b/src/libcamera/egl.cpp\n> @@ -345,6 +345,40 @@ bool eGL::isAvailable()\n> \treturn true;\n> }\n> \n> +/**\n> + * \\brief Update a 2D texture already created\n> + * \\param[in,out] eglImage EGL image to associate with the texture\n> + * \\param[data] Data to update the texture with\n> + *\n> + * Updates a 2D texture in VRAM.\n> + */\n> +void eGL::updateInputTexture2D(eGLImage &eglImage, void *data)\n> +{\n> +\tGLenum format;\n> +\tGLenum type = GL_UNSIGNED_BYTE;\n> +\n> +\tASSERT(tid_ == Thread::currentId());\n> +\n> +\tglActiveTexture(eglImage.texture_unit_);\n> +\tglBindTexture(GL_TEXTURE_2D, eglImage.texture_);\n> +\n> +\tswitch (eglImage.format_) {\n> +\tcase GL_R16F:\n> +\t\tformat = GL_RED;\n> +\t\ttype = GL_HALF_FLOAT;\n> +\t\tbreak;\n> +\tcase GL_RG8:\n> +\t\tformat = GL_RG;\n> +\t\tbreak;\n> +\tcase GL_LUMINANCE:\n> +\t\tformat = GL_LUMINANCE;\n> +\t\tbreak;\n> +\t}\n\nThe duplicate code from eGL::createInputTexture2D should be probably\nmoved to a helper. Proof: The same bug with uninitialised `format'.\n\n> +\n> +\t// Update an already exsiting texture\n\nC-style comments should be used.\n\ns/exsiting/existing/\n\n> +\tglTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, eglImage.width_, eglImage.height_, format, type, data);\n> +}\n> +\n> /**\n> * \\brief Create a 2D texture attached to an FBO for render-to-texture\n> * \\param[in,out] eglImage EGL image to associate with the texture\n> diff --git a/src/libcamera/software_isp/debayer_egl.cpp b/src/libcamera/software_isp/debayer_egl.cpp\n> index 0ec2a98cf..cdceacf96 100644\n> --- a/src/libcamera/software_isp/debayer_egl.cpp\n> +++ b/src/libcamera/software_isp/debayer_egl.cpp\n> @@ -536,7 +536,7 @@ int DebayerEGL::debayerGPU(FrameBuffer *input, FrameBuffer *output, const Debaye\n> \t\t\tLOG(Debayer, Error) << \"mmap-ing buffer(s) failed\";\n> \t\t\treturn -ENODEV;\n> \t\t}\n> -\t\tegl_.createTexture2D(*eglImageBayerIn_, inMapped->value().planes()[0].data());\n> +\t\tegl_.createInputTexture2D(*eglImageBayerIn_, inMapped->value().planes()[0].data());\n> \t}\n> \n> \t/* Generate the output render framebuffer as render to texture */","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 83F62C3264\n\tfor ;\n\tFri, 26 Jun 2026 11:08:18 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id B02B0658FA;\n\tFri, 26 Jun 2026 13:08:17 +0200 (CEST)","from us-smtp-delivery-124.mimecast.com\n\t(us-smtp-delivery-124.mimecast.com [170.10.133.124])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 32B96658ED\n\tfor ;\n\tFri, 26 Jun 2026 13:08:16 +0200 (CEST)","from mail-wm1-f70.google.com (mail-wm1-f70.google.com\n\t[209.85.128.70]) by relay.mimecast.com with ESMTP with STARTTLS\n\t(version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n\tus-mta-460-FCFSG982MVCeRZe9IH9WxQ-1; Fri, 26 Jun 2026 07:08:11 -0400","by mail-wm1-f70.google.com with SMTP id\n\t5b1f17b1804b1-490b4d3d3e6so6331695e9.0\n\tfor ;\n\tFri, 26 Jun 2026 04:08:11 -0700 (PDT)","from mzamazal-thinkpadp1gen7.tpbc.csb\n\t(ip-77-48-47-4.net.vodafone.cz. 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