From 999d446475694f41a692850f47d0798f5429f639 Mon Sep 17 00:00:00 2001 From: Milan Zamazal Date: Tue, 6 Jan 2026 17:00:52 +0000 Subject: [PATCH] libcamera: software_isp: GPU support for unpacked 10/12-bit formats The GPU processing supports 8-bit sensor formats and 10/12-bit packed formats. Support for 10/12-bit unpacked formats is missing, let's add it. 10/12-bit unpacked formats use two adjacent bytes to store the value. This means the 8-bit shaders can be used if we can modify them for additional support of 16-bit addressing. This requires the following modifications: - Using GL_RG (two bytes per pixel) instead of GL_LUMINANCE (one byte per pixel) as the texture format for the given input formats. - Setting the texture width to the number of pixels rather than the number of bytes. - Making the definition of `fetch' macro variable, according to the pixel format. - Using only `fetch' for accessing the texture. Signed-off-by: Milan Zamazal Reviewed-by: Hans de Goede 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: Bryan O'Donoghue Signed-off-by: Kieran Bingham --- src/libcamera/shaders/bayer_unpacked.frag | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/src/libcamera/shaders/bayer_unpacked.frag b/src/libcamera/shaders/bayer_unpacked.frag index af4a30c4..1b85196a 100644 --- a/src/libcamera/shaders/bayer_unpacked.frag +++ b/src/libcamera/shaders/bayer_unpacked.frag @@ -41,9 +41,17 @@ float apply_contrast(float value) void main(void) { vec3 rgb; + #if defined(RAW10P) + #define pixel(p) p.r / 4.0 + p.g * 64.0 + #define fetch(x, y) pixel(texture2D(tex_y, vec2(x, y))) + #elif defined(RAW12P) + #define pixel(p) p.r / 16.0 + p.g * 16.0 + #define fetch(x, y) pixel(texture2D(tex_y, vec2(x, y))) + #else #define fetch(x, y) texture2D(tex_y, vec2(x, y)).r + #endif - float C = texture2D(tex_y, center.xy).r; // ( 0, 0) + float C = fetch(center.x, center.y); // ( 0, 0) const vec4 kC = vec4( 4.0, 6.0, 5.0, 5.0) / 8.0; // Determine which of four types of pixels we are on.