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bh=h0PodFS5qCsCyCWWmRwb25OxPxljdoN865Ax2gcERF0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=mP0AE+HqWm0eUi+j3N/Wu3jiqQoq/TVRhdxuYjQCy+At5EB+lJElGd69IZfSDsJ6d PEcw7wJMidM6niyzA+lEU3owS0wTQbnIvKZbmwQGxZGx9izmjWbRuauZRYPLpekMHB 0QOcInocEFyxirvBg7jbcl4iUrqrymFArYdywH20= X-Riseup-User-ID: 4C21D9B088B280759A744A19E3AD30C66DC2FF9F68FF7EEE6FD7EEE672255839 Received: from [127.0.0.1] (localhost [127.0.0.1]) by fews02-sea.riseup.net (Postfix) with ESMTPSA id 4Tqjzp2fpVzFvsm; Wed, 6 Mar 2024 20:03:34 +0000 (UTC) From: Arthur Grillo Date: Wed, 06 Mar 2024 17:03:09 -0300 Subject: [PATCH 2/7] drm/vkms: Add comments Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240306-louis-vkms-conv-v1-2-5bfe7d129fdd@riseup.net> References: <20240306-louis-vkms-conv-v1-0-5bfe7d129fdd@riseup.net> In-Reply-To: <20240306-louis-vkms-conv-v1-0-5bfe7d129fdd@riseup.net> To: Rodrigo Siqueira , Melissa Wen , =?utf-8?q?Ma=C3=ADra_Canal?= , Haneen Mohammed , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , arthurgrillo@riseup.net, Jonathan Corbet , pekka.paalanen@haloniitty.fi, Louis Chauvet Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, jeremie.dautheribes@bootlin.com, miquel.raynal@bootlin.com, thomas.petazzoni@bootlin.com, seanpaul@google.com, marcheu@google.com, nicolejadeyee@google.com Signed-off-by: Arthur Grillo --- drivers/gpu/drm/vkms/vkms_formats.c | 47 +++++++++++++++++++++++++++++++++= ++++ 1 file changed, 47 insertions(+) diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkm= s_formats.c index 44d9b9b3bdc3..55ed3f598bd7 100644 --- a/drivers/gpu/drm/vkms/vkms_formats.c +++ b/drivers/gpu/drm/vkms/vkms_formats.c @@ -577,6 +577,18 @@ get_conversion_matrix_to_argb_u16(u32 format, enum drm= _color_encoding encoding, }, .y_offset =3D 0, }; + + /* + * Those matrixies were generated using the colour python framework + * + * Below are the function calls used to generate eac matrix, go to + * https://colour.readthedocs.io/en/develop/generated/colour.matrix_YCbCr= .html + * for more info: + * + * numpy.around(colour.matrix_YCbCr(K=3Dcolour.WEIGHTS_YCBCR["ITU-R BT.60= 1"], + * is_legal =3D False, + * bits =3D 8) * 2**32).astype(int) + */ static struct conversion_matrix yuv_bt601_full =3D { .matrix =3D { { 4294967296, 0, 6021544149 }, @@ -585,6 +597,12 @@ get_conversion_matrix_to_argb_u16(u32 format, enum drm= _color_encoding encoding, }, .y_offset =3D 0, }; + + /* + * numpy.around(colour.matrix_YCbCr(K=3Dcolour.WEIGHTS_YCBCR["ITU-R BT.60= 1"], + * is_legal =3D True, + * bits =3D 8) * 2**32).astype(int) + */ static struct conversion_matrix yuv_bt601_limited =3D { .matrix =3D { { 5020601039, 0, 6881764740 }, @@ -593,6 +611,12 @@ get_conversion_matrix_to_argb_u16(u32 format, enum drm= _color_encoding encoding, }, .y_offset =3D 16, }; + + /* + * numpy.around(colour.matrix_YCbCr(K=3Dcolour.WEIGHTS_YCBCR["ITU-R BT.70= 9"], + * is_legal =3D False, + * bits =3D 8) * 2**32).astype(int) + */ static struct conversion_matrix yuv_bt709_full =3D { .matrix =3D { { 4294967296, 0, 6763714498 }, @@ -601,6 +625,12 @@ get_conversion_matrix_to_argb_u16(u32 format, enum drm= _color_encoding encoding, }, .y_offset =3D 0, }; + + /* + * numpy.around(colour.matrix_YCbCr(K=3Dcolour.WEIGHTS_YCBCR["ITU-R BT.70= 9"], + * is_legal =3D True, + * bits =3D 8) * 2**32).astype(int) + */ static struct conversion_matrix yuv_bt709_limited =3D { .matrix =3D { { 5020601039, 0, 7729959424 }, @@ -609,6 +639,12 @@ get_conversion_matrix_to_argb_u16(u32 format, enum drm= _color_encoding encoding, }, .y_offset =3D 16, }; + + /* + * numpy.around(colour.matrix_YCbCr(K=3Dcolour.WEIGHTS_YCBCR["ITU-R BT.20= 20"], + * is_legal =3D False, + * bits =3D 8) * 2**32).astype(int) + */ static struct conversion_matrix yuv_bt2020_full =3D { .matrix =3D { { 4294967296, 0, 6333358775 }, @@ -617,6 +653,12 @@ get_conversion_matrix_to_argb_u16(u32 format, enum drm= _color_encoding encoding, }, .y_offset =3D 0, }; + + /* + * numpy.around(colour.matrix_YCbCr(K=3Dcolour.WEIGHTS_YCBCR["ITU-R BT.20= 20"], + * is_legal =3D True, + * bits =3D 8) * 2**32).astype(int) + */ static struct conversion_matrix yuv_bt2020_limited =3D { .matrix =3D { { 5020601039, 0, 7238124312 }, @@ -625,6 +667,11 @@ get_conversion_matrix_to_argb_u16(u32 format, enum drm= _color_encoding encoding, }, .y_offset =3D 16, }; + + /* + * The next matrices are just the previous ones, but with the first and + * second columns swapped + */ static struct conversion_matrix yvu_bt601_full =3D { .matrix =3D { { 4294967296, 6021544149, 0 }, --=20 2.43.0