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{ "id": 25130, "url": "https://patchwork.libcamera.org/api/patches/25130/?format=api", "web_url": "https://patchwork.libcamera.org/patch/25130/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20251120233347.5046-7-bryan.odonoghue@linaro.org>", "date": "2025-11-20T23:33:30", "name": "[v4,06/23] libcamera: shaders: Extend debayer shaders to apply RGB gain values on output", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "034a21c9938df5a8f94cecfef7232a6f5e7555dd", "submitter": { "id": 175, "url": "https://patchwork.libcamera.org/api/people/175/?format=api", "name": "Bryan O'Donoghue", "email": "bryan.odonoghue@linaro.org" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/25130/mbox/", "series": [ { "id": 5600, "url": "https://patchwork.libcamera.org/api/series/5600/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=5600", "date": "2025-11-20T23:33:24", "name": "Add GLES 2.0 GPUISP to libcamera", "version": 4, "mbox": "https://patchwork.libcamera.org/series/5600/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/25130/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/25130/checks/", "tags": {}, "headers": { "Return-Path": "<libcamera-devel-bounces@lists.libcamera.org>", "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 B784CBD80A\n\tfor <parsemail@patchwork.libcamera.org>;\n\tThu, 20 Nov 2025 23:34:06 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby 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"ASbGnct9RZe7rlAKdMLuyloi01yh4eb9JZQhtDeujtUOvkqW44Ay2Fyqgz8wMQ88Sp1\n\t7yRk/5V5+nVQShQY7HRv2Ln/eSwgXe/j7uY8qK60jIbOArtjcqTAS3xHxKjrDL+d44snLNc0/2/\n\tVBjEyiS/y1pGQmcXdd/6HX1bwH2iumgAGs+Cl4gkVn/Bthw/nK+VpgQmGmde3dLyIBVxEg7uuxi\n\t8hME0VcmlaJLKmbpu+kTbjv5JlKNoveuibdCzia8FPkd7pR0HxbPHaJBKid61Q6+j7ULWmmYJvz\n\tSwSzkqdJ/YXgnhTLax0d4epth/NNh0fevPit1BcUpqORY6MTGrgepHVkeOphWCKe4mvh78acoAU\n\tVvTYhbMnWNvJGBcfJifns9qYjSECDhLvW6R9wajYWqNpMWx0RnDFnTJCzUFAN0kLDmu8FoEOGUT\n\tUbTIamyRtxB/sRzhDo7cUfITeV83Ns3iOIb45Uu1uL7CVB2W62rg/2N9uN6lrFbmeKy2Y=", "X-Google-Smtp-Source": "AGHT+IHx3vrcZuLGdHapd7L/UfdiMYhJs6hSH1/M882yAfd978/ekZ8pen5Amxg+/I4LOrceD2ZUFw==", "X-Received": "by 2002:a05:600c:1f94:b0:477:af07:dd21 with SMTP id\n\t5b1f17b1804b1-477c1123edfmr591855e9.25.1763681642758; \n\tThu, 20 Nov 2025 15:34:02 -0800 (PST)", "From": "Bryan O'Donoghue <bryan.odonoghue@linaro.org>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "pavel@ucw.cz, Bryan O'Donoghue <bryan.odonoghue@linaro.org>,\n\tMilan Zamazal <mzamazal@redhat.com>", "Subject": "[PATCH v4 06/23] libcamera: shaders: Extend debayer shaders to apply\n\tRGB gain values on output", "Date": "Thu, 20 Nov 2025 23:33:30 +0000", "Message-ID": "<20251120233347.5046-7-bryan.odonoghue@linaro.org>", "X-Mailer": "git-send-email 2.51.2", "In-Reply-To": "<20251120233347.5046-1-bryan.odonoghue@linaro.org>", "References": "<20251120233347.5046-1-bryan.odonoghue@linaro.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-BeenThere": "libcamera-devel@lists.libcamera.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "Extend out the bayer fragment shaders to take 3 x 256 byte inputs as\ntextures from the CPU.\n\nWe then use an index to the table to recover the colour-corrected values\nprovided by the SoftIPA thread.\n\nReviewed-by: Milan Zamazal <mzamazal@redhat.com>\nSigned-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>\n---\n .../internal/shaders/bayer_1x_packed.frag | 56 +++++++++++++++++\n .../internal/shaders/bayer_unpacked.frag | 62 ++++++++++++++++++-\n 2 files changed, 117 insertions(+), 1 deletion(-)", "diff": "diff --git a/include/libcamera/internal/shaders/bayer_1x_packed.frag b/include/libcamera/internal/shaders/bayer_1x_packed.frag\nindex 19b13ad08..90bd64570 100644\n--- a/include/libcamera/internal/shaders/bayer_1x_packed.frag\n+++ b/include/libcamera/internal/shaders/bayer_1x_packed.frag\n@@ -65,6 +65,10 @@ uniform vec2 tex_step;\n uniform vec2 tex_bayer_first_red;\n \n uniform sampler2D tex_y;\n+uniform sampler2D red_param;\n+uniform sampler2D green_param;\n+uniform sampler2D blue_param;\n+uniform mat3 ccm;\n \n void main(void)\n {\n@@ -212,5 +216,57 @@ void main(void)\n \t\t\tvec3(patterns.y, C, patterns.x) :\n \t\t\tvec3(patterns.wz, C));\n \n+#if defined(APPLY_CCM_PARAMETERS)\n+\t/*\n+\t * CCM is a 3x3 in the format\n+\t *\n+\t * +--------------+----------------+---------------+\n+\t * | RedRedGain | RedGreenGain | RedBlueGain |\n+\t * +--------------+----------------+---------------+\n+\t * | GreenRedGain | GreenGreenGain | GreenBlueGain |\n+\t * +--------------+----------------+---------------+\n+\t * | BlueRedGain | BlueGreenGain | BlueBlueGain |\n+\t * +--------------+----------------+---------------+\n+\t *\n+\t * Rout = RedRedGain * Rin + RedGreenGain * Gin + RedBlueGain * Bin\n+\t * Gout = GreenRedGain * Rin + GreenGreenGain * Gin + GreenBlueGain * Bin\n+\t * Bout = BlueRedGain * Rin + BlueGreenGain * Gin + BlueBlueGain * Bin\n+\t *\n+\t * We upload to the GPU without transposition glUniformMatrix3f(.., .., GL_FALSE, ccm);\n+\t *\n+\t * CPU\n+\t * float ccm [] = {\n+\t * RedRedGain, RedGreenGain, RedBlueGain,\n+\t * GreenRedGain, GreenGreenGain, GreenBlueGain,\n+\t * BlueRedGain, BlueGreenGain, BlueBlueGain,\n+\t * };\n+\t *\n+\t * GPU\n+\t * ccm = {\n+\t * RedRedGain, GreenRedGain, BlueRedGain,\n+\t * RedGreenGain, GreenGreenGain, BlueGreenGain,\n+\t * RedBlueGain, GreenBlueGain, BlueBlueGain,\n+\t * }\n+\t *\n+\t * However the indexing for the mat data-type is column major hence\n+\t * ccm[0][0] = RedRedGain, ccm[0][1] = RedGreenGain, ccm[0][2] = RedBlueGain\n+\t *\n+\t */\n+\tfloat rin, gin, bin;\n+\trin = rgb.r;\n+\tgin = rgb.g;\n+\tbin = rgb.b;\n+\n+\trgb.r = (rin * ccm[0][0]) + (gin * ccm[0][1]) + (bin * ccm[0][2]);\n+\trgb.g = (rin * ccm[1][0]) + (gin * ccm[1][1]) + (bin * ccm[1][2]);\n+\trgb.b = (rin * ccm[2][0]) + (gin * ccm[2][1]) + (bin * ccm[2][2]);\n+\n+#elif defined(APPLY_RGB_PARAMETERS)\n+\t/* Apply bayer params */\n+\trgb.r = texture2D(red_param, vec2(rgb.r, 0.5)).r;\n+\trgb.g = texture2D(green_param, vec2(rgb.g, 0.5)).g;\n+\trgb.b = texture2D(blue_param, vec2(rgb.b, 0.5)).b;\n+#endif\n+\n \tgl_FragColor = vec4(rgb, 1.0);\n }\ndiff --git a/include/libcamera/internal/shaders/bayer_unpacked.frag b/include/libcamera/internal/shaders/bayer_unpacked.frag\nindex aa7a1b004..7c3d12b03 100644\n--- a/include/libcamera/internal/shaders/bayer_unpacked.frag\n+++ b/include/libcamera/internal/shaders/bayer_unpacked.frag\n@@ -21,11 +21,17 @@ precision highp float;\n \n /** Monochrome RGBA or GL_LUMINANCE Bayer encoded texture.*/\n uniform sampler2D tex_y;\n+uniform sampler2D\tred_param;\n+uniform sampler2D\tgreen_param;\n+uniform sampler2D\tblue_param;\n varying vec4 center;\n varying vec4 yCoord;\n varying vec4 xCoord;\n+uniform mat3\t\tccm;\n \n void main(void) {\n+ vec3 rgb;\n+\n #define fetch(x, y) texture2D(tex_y, vec2(x, y)).r\n \n float C = texture2D(tex_y, center.xy).r; // ( 0, 0)\n@@ -97,11 +103,65 @@ void main(void) {\n PATTERN.xw += kB.xw * B;\n PATTERN.xz += kF.xz * F;\n \n- gl_FragColor.rgb = (alternate.y == 0.0) ?\n+ rgb = (alternate.y == 0.0) ?\n ((alternate.x == 0.0) ?\n vec3(C, PATTERN.xy) :\n vec3(PATTERN.z, C, PATTERN.w)) :\n ((alternate.x == 0.0) ?\n vec3(PATTERN.w, C, PATTERN.z) :\n vec3(PATTERN.yx, C));\n+\n+#if defined(APPLY_CCM_PARAMETERS)\n+\t/*\n+\t * CCM is a 3x3 in the format\n+\t *\n+\t * +--------------+----------------+---------------+\n+\t * | RedRedGain | RedGreenGain | RedBlueGain |\n+\t * +--------------+----------------+---------------+\n+\t * | GreenRedGain | GreenGreenGain | GreenBlueGain |\n+\t * +--------------+----------------+---------------+\n+\t * | BlueRedGain | BlueGreenGain | BlueBlueGain |\n+\t * +--------------+----------------+---------------+\n+\t *\n+\t * Rout = RedRedGain * Rin + RedGreenGain * Gin + RedBlueGain * Bin\n+\t * Gout = GreenRedGain * Rin + GreenGreenGain * Gin + GreenBlueGain * Bin\n+\t * Bout = BlueRedGain * Rin + BlueGreenGain * Gin + BlueBlueGain * Bin\n+\t *\n+\t * We upload to the GPU without transposition glUniformMatrix3f(.., .., GL_FALSE, ccm);\n+\t *\n+\t * CPU\n+\t * float ccm [] = {\n+\t * RedRedGain, RedGreenGain, RedBlueGain,\n+\t * GreenRedGain, GreenGreenGain, GreenBlueGain,\n+\t * BlueRedGain, BlueGreenGain, BlueBlueGain,\n+\t * };\n+\t *\n+\t * GPU\n+\t * ccm = {\n+\t * RedRedGain, GreenRedGain, BlueRedGain,\n+\t * RedGreenGain, GreenGreenGain, BlueGreenGain,\n+\t * RedBlueGain, GreenBlueGain, BlueBlueGain,\n+\t * }\n+\t *\n+\t * However the indexing for the mat data-type is column major hence\n+\t * ccm[0][0] = RedRedGain, ccm[0][1] = RedGreenGain, ccm[0][2] = RedBlueGain\n+\t *\n+\t */\n+\tfloat rin, gin, bin;\n+\trin = rgb.r;\n+\tgin = rgb.g;\n+\tbin = rgb.b;\n+\n+\trgb.r = (rin * ccm[0][0]) + (gin * ccm[0][1]) + (bin * ccm[0][2]);\n+\trgb.g = (rin * ccm[1][0]) + (gin * ccm[1][1]) + (bin * ccm[1][2]);\n+\trgb.b = (rin * ccm[2][0]) + (gin * ccm[2][1]) + (bin * ccm[2][2]);\n+\n+#elif defined(APPLY_RGB_PARAMETERS)\n+\t/* Apply bayer params */\n+\trgb.r = texture2D(red_param, vec2(rgb.r, 0.5)).r;\n+\trgb.g = texture2D(green_param, vec2(rgb.g, 0.5)).g;\n+\trgb.b = texture2D(blue_param, vec2(rgb.b, 0.5)).b;\n+#endif\n+\n+ gl_FragColor.rgb = rgb;\n }\n", "prefixes": [ "v4", "06/23" ] }