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rotating by 180 degrees To: Thomas Zimmermann Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org References: <20260428083025.63663-1-tzimmermann@suse.de> Content-Language: en-US From: Helge Deller Autocrypt: addr=deller@gmx.de; keydata= xsFNBF3Ia3MBEAD3nmWzMgQByYAWnb9cNqspnkb2GLVKzhoH2QD4eRpyDLA/3smlClbeKkWT HLnjgkbPFDmcmCz5V0Wv1mKYRClAHPCIBIJgyICqqUZo2qGmKstUx3pFAiztlXBANpRECgwJ r+8w6mkccOM9GhoPU0vMaD/UVJcJQzvrxVHO8EHS36aUkjKd6cOpdVbCt3qx8cEhCmaFEO6u CL+k5AZQoABbFQEBocZE1/lSYzaHkcHrjn4cQjc3CffXnUVYwlo8EYOtAHgMDC39s9a7S90L 69l6G73lYBD/Br5lnDPlG6dKfGFZZpQ1h8/x+Qz366Ojfq9MuuRJg7ZQpe6foiOtqwKym/zV dVvSdOOc5sHSpfwu5+BVAAyBd6hw4NddlAQUjHSRs3zJ9OfrEx2d3mIfXZ7+pMhZ7qX0Axlq Lq+B5cfLpzkPAgKn11tfXFxP+hcPHIts0bnDz4EEp+HraW+oRCH2m57Y9zhcJTOJaLw4YpTY GRUlF076vZ2Hz/xMEvIJddRGId7UXZgH9a32NDf+BUjWEZvFt1wFSW1r7zb7oGCwZMy2LI/G aHQv/N0NeFMd28z+deyxd0k1CGefHJuJcOJDVtcE1rGQ43aDhWSpXvXKDj42vFD2We6uIo9D 1VNre2+uAxFzqqf026H6cH8hin9Vnx7p3uq3Dka/Y/qmRFnKVQARAQABzRxIZWxnZSBEZWxs 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The > original code in rotate_ud() rounded the value in width up to a > multiple of 8, aka the bit pitch, and calculated the rotated pixel > from that value. The new code stores the glyph's pitch in bit_pitch, > but fails to update the rotated pixel's output accordingly. Simply > replacing the variable does this. >=20 > The bug can be reproduced by setting a font with an unaligned width, > such as sun12x22, like this: >=20 > setfont sun12x22 > echo 2 > /sys/class/graphics/fbcon/rotate >=20 > Without the fix, the font looks distorted. >=20 > Fixes: a30e9e6b018f ("lib/fonts: Refactor glyph-rotation helpers") > Closes: https://lore.gitlab.freedesktop.org/drm-ai-reviews/review-patch7= -20260407092555.58816-8-tzimmermann@suse.de/ > Cc: dri-devel@lists.freedesktop.org > Cc: linux-fbdev@vger.kernel.org > Signed-off-by: Thomas Zimmermann > --- > lib/fonts/font_rotate.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) applied. Thanks! Helge