From c9954de93d77526eb7ea4a53322f535a5282c49d Mon Sep 17 00:00:00 2001 From: Bryan O'Donoghue Date: Tue, 6 Jan 2026 17:00:41 +0000 Subject: [PATCH] libcamera: shaders: Use highp not mediump for float precision mediump gives 10 bits of mantissa as the resolution. At higher resolutions 10 bits of accuracy is insufficient - for example at a width of 1928 bytes we need log2(1928) = ~11 bit resolution. Switching to highp gives us 23 bits of mantissa giving a sample width precision of about 2^23 ~ 8,388,608. Acked-by: Kieran Bingham Reviewed-by: Milan Zamazal 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/RGB.frag | 2 +- src/libcamera/shaders/YUV_2_planes.frag | 2 +- src/libcamera/shaders/YUV_3_planes.frag | 2 +- src/libcamera/shaders/YUV_packed.frag | 2 +- src/libcamera/shaders/bayer_1x_packed.frag | 2 +- src/libcamera/shaders/bayer_unpacked.frag | 2 +- 6 files changed, 6 insertions(+), 6 deletions(-) diff --git a/src/libcamera/shaders/RGB.frag b/src/libcamera/shaders/RGB.frag index 4c374ac9..72439589 100644 --- a/src/libcamera/shaders/RGB.frag +++ b/src/libcamera/shaders/RGB.frag @@ -6,7 +6,7 @@ */ #ifdef GL_ES -precision mediump float; +precision highp float; #endif varying vec2 textureOut; diff --git a/src/libcamera/shaders/YUV_2_planes.frag b/src/libcamera/shaders/YUV_2_planes.frag index 1d5d1206..d286f117 100644 --- a/src/libcamera/shaders/YUV_2_planes.frag +++ b/src/libcamera/shaders/YUV_2_planes.frag @@ -6,7 +6,7 @@ */ #ifdef GL_ES -precision mediump float; +precision highp float; #endif varying vec2 textureOut; diff --git a/src/libcamera/shaders/YUV_3_planes.frag b/src/libcamera/shaders/YUV_3_planes.frag index 8f788e90..8e3e0b4a 100644 --- a/src/libcamera/shaders/YUV_3_planes.frag +++ b/src/libcamera/shaders/YUV_3_planes.frag @@ -6,7 +6,7 @@ */ #ifdef GL_ES -precision mediump float; +precision highp float; #endif varying vec2 textureOut; diff --git a/src/libcamera/shaders/YUV_packed.frag b/src/libcamera/shaders/YUV_packed.frag index b9ef9d41..3c9e3e39 100644 --- a/src/libcamera/shaders/YUV_packed.frag +++ b/src/libcamera/shaders/YUV_packed.frag @@ -6,7 +6,7 @@ */ #ifdef GL_ES -precision mediump float; +precision highp float; #endif varying vec2 textureOut; diff --git a/src/libcamera/shaders/bayer_1x_packed.frag b/src/libcamera/shaders/bayer_1x_packed.frag index f53f5575..19b13ad0 100644 --- a/src/libcamera/shaders/bayer_1x_packed.frag +++ b/src/libcamera/shaders/bayer_1x_packed.frag @@ -20,7 +20,7 @@ */ #ifdef GL_ES -precision mediump float; +precision highp float; #endif /* diff --git a/src/libcamera/shaders/bayer_unpacked.frag b/src/libcamera/shaders/bayer_unpacked.frag index 7e35ca88..aa7a1b00 100644 --- a/src/libcamera/shaders/bayer_unpacked.frag +++ b/src/libcamera/shaders/bayer_unpacked.frag @@ -16,7 +16,7 @@ Copyright (C) 2021, Linaro //Pixel Shader #ifdef GL_ES -precision mediump float; +precision highp float; #endif /** Monochrome RGBA or GL_LUMINANCE Bayer encoded texture.*/