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\n\tMon, 26 Jan 2026 02:43:05 -0800 (PST)","From":"Rick ten Wolde ","To":"libcamera-devel@lists.libcamera.org","Cc":"xander.c.pronk@gmail.com, derekgielen@outlook.com,\n\t22012540@student.hhs.nl, \n\trick.w.ten.wolde@gmail.com, johannes.goede@oss.qualcomm.com,\n\tRick ten Wolde ","Subject":"[PATCH 4/7] libcamera: shaders: Add LSC support","Date":"Mon, 26 Jan 2026 11:42:52 +0100","Message-ID":"<20260126104256.119697-5-rick.w.ten.wolde@gmail.com>","X-Mailer":"git-send-email 2.51.0","In-Reply-To":"<20260126104256.119697-1-rick.w.ten.wolde@gmail.com>","References":"<20260126104256.119697-1-rick.w.ten.wolde@gmail.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-Mailman-Approved-At":"Mon, 26 Jan 2026 11:48:05 +0100","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\" "},"content":"From: Xander Pronk \n\nApply LSC after black-level and before CCM operations.\n\nCo-authored-by: Rick ten Wolde \nSigned-off-by: Rick ten Wolde \nSigned-off-by: Xander Pronk \n---\n src/libcamera/shaders/bayer_1x_packed.frag | 10 ++++++++++\n src/libcamera/shaders/bayer_unpacked.frag | 10 ++++++++++\n 2 files changed, 20 insertions(+)","diff":"diff --git a/src/libcamera/shaders/bayer_1x_packed.frag b/src/libcamera/shaders/bayer_1x_packed.frag\nindex 23747f78..7993ea1d 100644\n--- a/src/libcamera/shaders/bayer_1x_packed.frag\n+++ b/src/libcamera/shaders/bayer_1x_packed.frag\n@@ -70,6 +70,10 @@ uniform vec3 blacklevel;\n uniform float gamma;\n uniform float contrastExp;\n \n+uniform sampler2D lsc_tex_red;\n+uniform sampler2D lsc_tex_blue;\n+uniform sampler2D lsc_tex_green;\n+\n float apply_contrast(float value)\n {\n \t// Apply simple S-curve\n@@ -227,6 +231,12 @@ void main(void)\n \n \trgb = rgb - blacklevel;\n \n+\t#if defined(DO_LSC)\n+\trgb.r = rgb.r + rgb.r * 3.0 * texture2D(lsc_tex_red, textureOut).x;\n+\trgb.g = rgb.g + rgb.g * 3.0 * texture2D(lsc_tex_green, textureOut).x;\n+\trgb.b = rgb.b + rgb.b * 3.0 * texture2D(lsc_tex_blue, textureOut).x;\n+\t#endif\n+\n \t/*\n \t * CCM is a 3x3 in the format\n \t *\ndiff --git a/src/libcamera/shaders/bayer_unpacked.frag b/src/libcamera/shaders/bayer_unpacked.frag\nindex 1b85196a..f0b9a6cc 100644\n--- a/src/libcamera/shaders/bayer_unpacked.frag\n+++ b/src/libcamera/shaders/bayer_unpacked.frag\n@@ -29,6 +29,10 @@ uniform vec3 blacklevel;\n uniform float gamma;\n uniform float contrastExp;\n \n+uniform sampler2D lsc_tex_red;\n+uniform sampler2D lsc_tex_blue;\n+uniform sampler2D lsc_tex_green;\n+\n float apply_contrast(float value)\n {\n // Apply simple S-curve\n@@ -130,6 +134,12 @@ void main(void) {\n \n rgb = rgb - blacklevel;\n \n+ #if defined(DO_LSC)\n+ rgb.r = rgb.r + rgb.r * 3.0 * texture2D(lsc_tex_red, center.xy).x;\n+ rgb.g = rgb.g + rgb.g * 3.0 * texture2D(lsc_tex_green, center.xy).x;\n+ rgb.b = rgb.b + rgb.b * 3.0 * texture2D(lsc_tex_blue, center.xy).x;\n+ #endif\n+\n /*\n * CCM is a 3x3 in the format\n *\n","prefixes":["4/7"]}