[v5,07/24] libcamera: shaders: Extend bayer shaders to support swapping R and B on output
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Message ID 20251127023739.179652-8-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 Nov. 27, 2025, 2:37 a.m. UTC 
We can easily facilitate swapping R and B on output. Pivot on an
environment define for this purpose.

Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 src/libcamera/shaders/bayer_1x_packed.frag | 4 ++++
 src/libcamera/shaders/bayer_unpacked.frag  | 6 +++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

Patch
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diff --git a/src/libcamera/shaders/bayer_1x_packed.frag b/src/libcamera/shaders/bayer_1x_packed.frag
index 90bd64570..c0632eb1f 100644
--- a/src/libcamera/shaders/bayer_1x_packed.frag
+++ b/src/libcamera/shaders/bayer_1x_packed.frag
@@ -268,5 +268,9 @@  void main(void)
 	rgb.b = texture2D(blue_param, vec2(rgb.b, 0.5)).b;
 #endif
 
+#if defined (SWAP_BLUE)
+	gl_FragColor = vec4(rgb.bgr, 1.0);
+#else
 	gl_FragColor = vec4(rgb, 1.0);
+#endif
 }
diff --git a/src/libcamera/shaders/bayer_unpacked.frag b/src/libcamera/shaders/bayer_unpacked.frag
index 924c477de..a9996b94e 100644
--- a/src/libcamera/shaders/bayer_unpacked.frag
+++ b/src/libcamera/shaders/bayer_unpacked.frag
@@ -163,5 +163,9 @@  void main(void) {
         rgb.b = texture2D(blue_param, vec2(rgb.b, 0.5)).b;
 #endif
 
-    gl_FragColor.rgb = rgb;
+#if defined (SWAP_BLUE)
+        gl_FragColor = vec4(rgb.bgr, 1.0);
+#else
+        gl_FragColor = vec4(rgb, 1.0);
+#endif
 }