From 6029dcf9a6dee38130bef23750444867cb517018 Mon Sep 17 00:00:00 2001 From: Bryan O'Donoghue Date: Tue, 6 Jan 2026 17:00:44 +0000 Subject: [PATCH] libcamera: shaders: Add support for black level compensation Add the ability to apply a int blacklevel subtraction against the demosaiced data prior to application of colour correction data. Reviewed-by: Milan Zamazal Signed-off-by: Bryan O'Donoghue Reviewed-by: Kieran Bingham Tested-by: Robert Mader Tested-by: Hans de Goede # ThinkPad T14s gen 6 (arm64) ov02c10 + X1c gen 12 ov08x40 Tested-by: Kieran Bingham # Lenovo X13s Signed-off-by: Kieran Bingham --- src/libcamera/shaders/bayer_1x_packed.frag | 3 +++ src/libcamera/shaders/bayer_unpacked.frag | 3 +++ 2 files changed, 6 insertions(+) diff --git a/src/libcamera/shaders/bayer_1x_packed.frag b/src/libcamera/shaders/bayer_1x_packed.frag index db8c2a0b..7036fe27 100644 --- a/src/libcamera/shaders/bayer_1x_packed.frag +++ b/src/libcamera/shaders/bayer_1x_packed.frag @@ -66,6 +66,7 @@ uniform vec2 tex_bayer_first_red; uniform sampler2D tex_y; uniform mat3 ccm; +uniform vec3 blacklevel; void main(void) { @@ -213,6 +214,8 @@ void main(void) vec3(patterns.y, C, patterns.x) : vec3(patterns.wz, C)); + rgb = rgb - blacklevel; + /* * CCM is a 3x3 in the format * diff --git a/src/libcamera/shaders/bayer_unpacked.frag b/src/libcamera/shaders/bayer_unpacked.frag index 06d80f3d..f0d8cd1e 100644 --- a/src/libcamera/shaders/bayer_unpacked.frag +++ b/src/libcamera/shaders/bayer_unpacked.frag @@ -25,6 +25,7 @@ varying vec4 center; varying vec4 yCoord; varying vec4 xCoord; uniform mat3 ccm; +uniform vec3 blacklevel; void main(void) { vec3 rgb; @@ -108,6 +109,8 @@ void main(void) { vec3(PATTERN.w, C, PATTERN.z) : vec3(PATTERN.yx, C)); + rgb = rgb - blacklevel; + /* * CCM is a 3x3 in the format *