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mode: Add a function to get padding bytes per line (MR 13)

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Add a function to get extra padding bytes needed to make bytes
per width a multiple of 8.
This commit is contained in:
Yassine Oudjana
2022-02-24 09:00:23 +04:00
committed by Martijn Braam
parent 7dbc2288d0
commit ba57d91da4
2 changed files with 15 additions and 0 deletions
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13
src/mode.c
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@@ -208,6 +208,19 @@ mp_pixel_format_width_to_bytes(MPPixelFormat pixel_format, uint32_t width)
return (bits_per_width + 8 - remainder) / 8;
}
uint32_t
mp_pixel_format_width_to_padding(MPPixelFormat pixel_format, uint32_t width)
{
uint64_t bytes_per_width =
mp_pixel_format_width_to_bytes(pixel_format, width);
uint64_t remainder = bytes_per_width % 8;
if (remainder == 0)
return remainder;
return 8 - remainder;
}
uint32_t
mp_pixel_format_width_to_colors(MPPixelFormat pixel_format, uint32_t width)
{

2
src/mode.h
View File

@@ -33,6 +33,8 @@ uint32_t mp_pixel_format_pixel_depth(MPPixelFormat pixel_format);
const char *mp_pixel_format_cfa(MPPixelFormat pixel_format);
const char *mp_pixel_format_cfa_pattern(MPPixelFormat pixel_format);
uint32_t mp_pixel_format_width_to_bytes(MPPixelFormat pixel_format, uint32_t width);
uint32_t mp_pixel_format_width_to_padding(MPPixelFormat pixel_format,
uint32_t width);
uint32_t mp_pixel_format_width_to_colors(MPPixelFormat pixel_format, uint32_t width);
uint32_t mp_pixel_format_height_to_colors(MPPixelFormat pixel_format,
uint32_t height);