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Diffstat (limited to '')
| -rw-r--r-- | libfonts_get_subpixel_order_class.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/libfonts_get_subpixel_order_class.c b/libfonts_get_subpixel_order_class.c new file mode 100644 index 0000000..577b0f0 --- /dev/null +++ b/libfonts_get_subpixel_order_class.c @@ -0,0 +1,41 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +enum libfonts_subpixel_order_class +libfonts_get_subpixel_order_class(enum libfonts_subpixel_order order, + enum libfonts_subpixel_colour *cell1p, + enum libfonts_subpixel_colour *cell2p, + enum libfonts_subpixel_colour *cell3p) +{ + enum libfonts_subpixel_colour c1, c2, c3; + enum libfonts_subpixel_order_class layout; + int i; /* RGB, RBG, GRB, GBR, BRG, BGR */ + + if (order >= LIBFONTS_SUBPIXEL_ORDER_RGB && order <= LIBFONTS_SUBPIXEL_ORDER_G_R_B) { + layout = ((order - LIBFONTS_SUBPIXEL_ORDER_RGB) & 1) + LIBFONTS_SUBPIXEL_ORDER_CLASS_123; + i = (order - LIBFONTS_SUBPIXEL_ORDER_RGB) / 2; + i = ((int []){0, 5, 3, 1, 4, 2})[i]; + + } else if (order >= LIBFONTS_SUBPIXEL_ORDER_RR_GB && order <= LIBFONTS_SUBPIXEL_ORDER_BALANCED_BR_BG) { + layout = ((order - LIBFONTS_SUBPIXEL_ORDER_RR_GB) & 3) + LIBFONTS_SUBPIXEL_ORDER_CLASS_11_23; + if (order >= LIBFONTS_SUBPIXEL_ORDER_BALANCED_RR_GB) + layout += 4; + i = (order - LIBFONTS_SUBPIXEL_ORDER_RR_GB) / 4 % 6; + + } else { + layout = LIBFONTS_SUBPIXEL_ORDER_CLASS_OTHER; + i = 0; + } + + c1 = i / 2; + c2 = (i + 1 + i / 3) % 3; + c3 = 3 - c1 - c2; + if (cell1p) + *cell1p = c1; + if (cell2p) + *cell2p = c2; + if (cell3p) + *cell3p = c3; + return layout; +} |