[v7,08/26] libcamera: shaders: Add support for black level compensation
diff mbox series

Message ID 20251210005354.44726-9-bryan.odonoghue@linaro.org
State New
Headers show
Series
  • Add GLES 2.0 GPUISP to libcamera
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Commit Message

Bryan O'Donoghue Dec. 10, 2025, 12:53 a.m. UTC 
Add the ability to apply a int blacklevel gain against the demosaiced data
prior to application of colour correction data.

Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 src/libcamera/shaders/bayer_1x_packed.frag | 3 +++
 src/libcamera/shaders/bayer_unpacked.frag  | 3 +++
 2 files changed, 6 insertions(+)

Patch
diff mbox series 

diff --git a/src/libcamera/shaders/bayer_1x_packed.frag b/src/libcamera/shaders/bayer_1x_packed.frag
index db8c2a0b3..7036fe278 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 06d80f3dd..f0d8cd1e2 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
      *