From eb06a81e42195ef57dab4b567f646b5b7596ca90 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Thu, 30 Jun 2022 15:16:23 +0200 Subject: [PATCH] util: improve SMPTE color LUT accuracy Fill in the LSB when converting color components from 8-bit to 16-bit. Signed-off-by: Geert Uytterhoeven Acked-by: Sam Ravnborg Reviewed-by: Dmitry Baryshkov --- v5: - Add Reviewed-by, v4: - No changes, v3: - Add Acked-by, v2: - New. --- tests/util/pattern.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tests/util/pattern.c b/tests/util/pattern.c index bd0989e6..7d4f6610 100644 --- a/tests/util/pattern.c +++ b/tests/util/pattern.c @@ -646,9 +646,9 @@ void util_smpte_c8_gamma(unsigned size, struct drm_color_lut *lut) memset(lut, 0, size * sizeof(struct drm_color_lut)); #define FILL_COLOR(idx, r, g, b) \ - lut[idx].red = (r) << 8; \ - lut[idx].green = (g) << 8; \ - lut[idx].blue = (b) << 8 + lut[idx].red = (r) * 0x101; \ + lut[idx].green = (g) * 0x101; \ + lut[idx].blue = (b) * 0x101 FILL_COLOR( 0, 192, 192, 192); /* grey */ FILL_COLOR( 1, 192, 192, 0 ); /* yellow */