From patchwork Wed Jul 8 14:14:34 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Milan Zamazal X-Patchwork-Id: 27307 Return-Path: X-Original-To: parsemail@patchwork.libcamera.org Delivered-To: parsemail@patchwork.libcamera.org Received: from lancelot.ideasonboard.com (lancelot.ideasonboard.com [92.243.16.209]) by patchwork.libcamera.org (Postfix) with ESMTPS id F12FEC3306 for ; Wed, 8 Jul 2026 14:15:14 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id A007D660B9; Wed, 8 Jul 2026 16:15:14 +0200 (CEST) Authentication-Results: lancelot.ideasonboard.com; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="YhTEwaeL"; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id C11D16609B for ; Wed, 8 Jul 2026 16:15:11 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1783520110; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=TuJo0lsKQNbDPUvAmFg7g90qA7F9OqrhGIFP3EAZOVA=; b=YhTEwaeLmhLUEfLH/U+Wkz6jFO+Zslq+DYBaQJc2Ar6iWqO+DWAHwborhuJOU38kVUUzm4 lXAap+yzeeZVmJCuIzcnBzs15LZiuhu1UFH/Hb5Hyg+XAlvO3p0BcAQmqvLt2YrXmSPQIr VFfjP0pPFAnyMN1QLwUuiVhoyN9Feb8= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-544-nYChypnwMlGbwBbwRxnXnw-1; Wed, 08 Jul 2026 10:15:05 -0400 X-MC-Unique: nYChypnwMlGbwBbwRxnXnw-1 X-Mimecast-MFC-AGG-ID: nYChypnwMlGbwBbwRxnXnw_1783520104 Received: from mx-prod-int-10.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-10.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.95]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 4AD9D195609D; Wed, 8 Jul 2026 14:15:04 +0000 (UTC) Received: from mzamazal-thinkpadp1gen7.tpbc.com (unknown [10.44.48.228]) by mx-prod-int-10.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id EC5FB38590; Wed, 8 Jul 2026 14:15:01 +0000 (UTC) From: Milan Zamazal To: libcamera-devel@lists.libcamera.org Cc: Xander Pronk , Bryan O'Donoghue , Hans de Goede , Laurent Pinchart , Rick ten Wolde , Milan Zamazal Subject: [RFC PATCH v6 6/6] libcamera: software_isp: debayer_egl: Add LSC support Date: Wed, 8 Jul 2026 16:14:34 +0200 Message-ID: <20260708141436.119165-7-mzamazal@redhat.com> In-Reply-To: <20260708141436.119165-1-mzamazal@redhat.com> References: <20260708141436.119165-1-mzamazal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.6 on 10.30.177.95 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: uvICJHJiIFsfWlJv-JzwqvUZSj-K_0K5xKykDh7lKf8_1783520104 X-Mimecast-Originator: redhat.com content-type: text/plain; charset="US-ASCII"; x-default=true X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libcamera-devel-bounces@lists.libcamera.org Sender: "libcamera-devel" From: Xander Pronk Add support for passing the LSC table from debayerParams to the shaders. The LSC table values are floats, we must add `type' parameter to createTexture2D to support this. Moreover, we use 16-bit internal format for the values, primarily because this works for me, unlike 32-bit floats. Co-developed-by: Rick ten Wolde Signed-off-by: Rick ten Wolde Signed-off-by: Xander Pronk Signed-off-by: Milan Zamazal --- include/libcamera/internal/egl.h | 6 +++- .../internal/software_isp/debayer_params.h | 2 ++ src/libcamera/egl.cpp | 10 ++++-- src/libcamera/software_isp/debayer.cpp | 5 +++ src/libcamera/software_isp/debayer_egl.cpp | 32 +++++++++++++++++-- src/libcamera/software_isp/debayer_egl.h | 7 ++++ 6 files changed, 57 insertions(+), 5 deletions(-) diff --git a/include/libcamera/internal/egl.h b/include/libcamera/internal/egl.h index 030c813a5..37da2b18a 100644 --- a/include/libcamera/internal/egl.h +++ b/include/libcamera/internal/egl.h @@ -107,7 +107,11 @@ public: int createInputDMABufTexture2D(eGLImage &eglImage, int fd); int createOutputDMABufTexture2D(eGLImage &eglImage, int fd); - void createTexture2D(eGLImage &eglImage, void *data, GLint filter); + void createTexture2D(eGLImage &eglImage, + GLint internalFormat, + GLenum type, + const void *data, + GLint filter); void pushEnv(std::vector &shaderEnv, const char *str); void makeCurrent(); diff --git a/include/libcamera/internal/software_isp/debayer_params.h b/include/libcamera/internal/software_isp/debayer_params.h index 4eb6c7e8d..0b96d4ffe 100644 --- a/include/libcamera/internal/software_isp/debayer_params.h +++ b/include/libcamera/internal/software_isp/debayer_params.h @@ -30,6 +30,8 @@ struct DebayerParams { static constexpr unsigned int kLscGridSize = 16; static constexpr unsigned int kLscValuesPerCell = 3; using LscValueType = float; + static constexpr unsigned int kLscBytesPerCell = + kLscValuesPerCell * sizeof(LscValueType); using LscLookupTable = std::array; LscLookupTable lscLut{}; diff --git a/src/libcamera/egl.cpp b/src/libcamera/egl.cpp index aeac5d313..c2a158ce7 100644 --- a/src/libcamera/egl.cpp +++ b/src/libcamera/egl.cpp @@ -241,6 +241,8 @@ int eGL::createOutputDMABufTexture2D(eGLImage &eglImage, int fd) /** * \brief Create a 2D texture from a memory buffer * \param[in,out] eglImage EGL image to associate with the texture + * \param[in] internalFormat OpenGL internal storage format (e.g., GL_RGB8, GL_RGBA8) + * \param[in] type OpenGL pixel data type (e.g., GL_UNSIGNED_BYTE, GL_FLOAT) * \param[in] data Pointer to pixel data, or nullptr for uninitialised texture * \param[in] filter GL texture filter setting * @@ -249,7 +251,11 @@ int eGL::createOutputDMABufTexture2D(eGLImage &eglImage, int fd) * is useful for uploading static data like lookup tables or uniform color * matrices to the GPU. */ -void eGL::createTexture2D(eGLImage &eglImage, void *data, GLint filter) +void eGL::createTexture2D(eGLImage &eglImage, + GLint internalFormat, + GLenum type, + const void *data, + GLint filter) { ASSERT(tid_ == Thread::currentId()); @@ -257,7 +263,7 @@ void eGL::createTexture2D(eGLImage &eglImage, void *data, GLint filter) glBindTexture(GL_TEXTURE_2D, eglImage.texture_); // Generate texture, bind, associate image to texture, configure, unbind - glTexImage2D(GL_TEXTURE_2D, 0, eglImage.format_, eglImage.width_, eglImage.height_, 0, eglImage.format_, GL_UNSIGNED_BYTE, data); + glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, eglImage.width_, eglImage.height_, 0, eglImage.format_, type, data); // Nearest filtering glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter); diff --git a/src/libcamera/software_isp/debayer.cpp b/src/libcamera/software_isp/debayer.cpp index 5c4bd914b..2bf64e570 100644 --- a/src/libcamera/software_isp/debayer.cpp +++ b/src/libcamera/software_isp/debayer.cpp @@ -58,6 +58,11 @@ namespace libcamera { * \brief Type of LSC grid values */ +/** + * \var DebayerParams::kLscBytesPerCell + * \brief Number of bytes per each of the lens shading grid areas + */ + /** * \typedef DebayerParams::LscLookupTable * \brief Lookup table for lens shading correction diff --git a/src/libcamera/software_isp/debayer_egl.cpp b/src/libcamera/software_isp/debayer_egl.cpp index 562e9fc7a..a73a00759 100644 --- a/src/libcamera/software_isp/debayer_egl.cpp +++ b/src/libcamera/software_isp/debayer_egl.cpp @@ -128,6 +128,9 @@ int DebayerEGL::getShaderVariableLocations(void) textureUniformBayerFirstRed_ = glGetUniformLocation(programId_, "tex_bayer_first_red"); textureUniformProjMatrix_ = glGetUniformLocation(programId_, "proj_matrix"); + textureUniformLsc_ = glGetUniformLocation(programId_, "lsc_tex"); + lscEnabledUniform_ = glGetUniformLocation(programId_, "lsc_enabled"); + LOG(Debayer, Debug) << "vertexIn " << attributeVertex_ << " textureIn " << attributeTexture_ << " tex_y " << textureUniformBayerDataIn_ << " awb " << awbUniformDataIn_ @@ -139,7 +142,9 @@ int DebayerEGL::getShaderVariableLocations(void) << " tex_size " << textureUniformSize_ << " stride_factor " << textureUniformStrideFactor_ << " tex_bayer_first_red " << textureUniformBayerFirstRed_ - << " proj_matrix " << textureUniformProjMatrix_; + << " proj_matrix " << textureUniformProjMatrix_ + << " tex_lsc " << textureUniformLsc_ + << " lsc_enabled" << lscEnabledUniform_; return 0; } @@ -156,6 +161,9 @@ int DebayerEGL::initBayerShaders(PixelFormat inputFormat, PixelFormat outputForm /* Specify GL_OES_EGL_image_external */ egl_.pushEnv(shaderEnv, "#extension GL_OES_EGL_image_external: enable"); + if (lscEnabled_) + egl_.pushEnv(shaderEnv, "#define APPLY_LSC"); + /* * Tell shaders how to re-order output taking account of how the pixels * are actually stored by EGL. @@ -348,6 +356,18 @@ int DebayerEGL::configure(const StreamConfiguration &inputCfg, */ stats_->setWindow(Rectangle(window_.size())); + if (lscEnabled_) { + constexpr unsigned int gridSize = DebayerParams::kLscGridSize; + const unsigned int stride = gridSize * DebayerParams::kLscBytesPerCell; + eglImageLscLookup_ = + std::make_unique(GL_RGB, + gridSize, + gridSize, + stride, + GL_TEXTURE2, + 2); + } + return 0; } @@ -483,6 +503,13 @@ void DebayerEGL::setShaderVariableValues(const DebayerParams ¶ms) glUniformMatrix3fv(ccmUniformDataIn_, 1, GL_TRUE, params.combinedMatrix.data().data()); LOG(Debayer, Debug) << " ccmUniformDataIn_ " << ccmUniformDataIn_ << " data " << params.combinedMatrix; + if (lscEnabled_) { + egl_.createTexture2D(*eglImageLscLookup_, GL_RGB16F, GL_FLOAT, + params.lscLut.data(), GL_LINEAR); + glUniform1i(textureUniformLsc_, eglImageLscLookup_->texture_unit_uniform_id_); + glUniform1i(lscEnabledUniform_, params.lscEnabled); + } + /* * 0 = Red, 1 = Green, 2 = Blue */ @@ -530,7 +557,8 @@ int DebayerEGL::debayerGPU(FrameBuffer *input, FrameBuffer *output, const Debaye LOG(Debayer, Error) << "mmap-ing buffer(s) failed"; return -ENODEV; } - egl_.createTexture2D(*eglImageBayerIn_, inMapped->value().planes()[0].data(), GL_NEAREST); + egl_.createTexture2D(*eglImageBayerIn_, glFormat_, GL_UNSIGNED_BYTE, + inMapped->value().planes()[0].data(), GL_NEAREST); } /* Generate the output render framebuffer as render to texture */ diff --git a/src/libcamera/software_isp/debayer_egl.h b/src/libcamera/software_isp/debayer_egl.h index 82ed1305d..2af26fb74 100644 --- a/src/libcamera/software_isp/debayer_egl.h +++ b/src/libcamera/software_isp/debayer_egl.h @@ -78,7 +78,10 @@ private: std::unique_ptr eglImageBayerIn_; std::unique_ptr eglImageBayerOut_; + /* LSC lookup table */ + std::unique_ptr eglImageLscLookup_; bool lscEnabled_; + /* Shader parameters */ float firstRed_x_; float firstRed_y_; @@ -95,6 +98,10 @@ private: /* Per-frame AWB gains */ GLint awbUniformDataIn_; + /* Lens shading correction */ + GLint textureUniformLsc_; + GLboolean lscEnabledUniform_; + /* Represent per-frame CCM as a uniform vector of floats 3 x 3 */ GLint ccmUniformDataIn_;