[v6,07/24] libcamera: shaders: Extend bayer shaders to support swapping R and B on output
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Message ID 20251202134544.662446-8-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 Dec. 2, 2025, 1:45 p.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 171a928c2..db8c2a0b3 100644
--- a/src/libcamera/shaders/bayer_1x_packed.frag
+++ b/src/libcamera/shaders/bayer_1x_packed.frag
@@ -257,5 +257,9 @@  void main(void)
 	rgb.g = (rin * ccm[1][0]) + (gin * ccm[1][1]) + (bin * ccm[1][2]);
 	rgb.b = (rin * ccm[2][0]) + (gin * ccm[2][1]) + (bin * ccm[2][2]);
 
+#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 c41d72f4f..06d80f3dd 100644
--- a/src/libcamera/shaders/bayer_unpacked.frag
+++ b/src/libcamera/shaders/bayer_unpacked.frag
@@ -152,5 +152,9 @@  void main(void) {
     rgb.g = (rin * ccm[1][0]) + (gin * ccm[1][1]) + (bin * ccm[1][2]);
     rgb.b = (rin * ccm[2][0]) + (gin * ccm[2][1]) + (bin * ccm[2][2]);
 
-    gl_FragColor.rgb = rgb;
+#if defined (SWAP_BLUE)
+    gl_FragColor = vec4(rgb.bgr, 1.0);
+#else
+    gl_FragColor = vec4(rgb, 1.0);
+#endif
 }