diff options
Diffstat (limited to 'libskrift.h')
| -rw-r--r-- | libskrift.h | 120 |
1 files changed, 101 insertions, 19 deletions
diff --git a/libskrift.h b/libskrift.h index 843de6e..57eb4d1 100644 --- a/libskrift.h +++ b/libskrift.h @@ -2,6 +2,7 @@ #ifndef LIBSKRIFT_H #define LIBSKRIFT_H 1 +#include <math.h> #include <stddef.h> #include <stdint.h> #include <stdio.h> @@ -86,25 +87,25 @@ enum libskrift_hinting { LIBSKRIFT_FULL = 100 }; -#define LIBSKRIFT_REMOVE_GAMMA 0x00000001L -#define LIBSKRIFT_Y_INCREASES_UPWARDS 0x00000002L /* SFT_DOWNWARD_Y otherwise */ -#define LIBSKRIFT_FLIP_TEXT 0x00000004L -#define LIBSKRIFT_FLIP_CHARS 0x00000008L -#define LIBSKRIFT_MIRROR_TEXT 0x00000010L -#define LIBSKRIFT_MIRROR_CHARS 0x00000020L -#define LIBSKRIFT_TRANSPOSE_TEXT 0x00000040L -#define LIBSKRIFT_TRANSPOSE_CHARS 0x00000080L -#define LIBSKRIFT_NO_LIGATURES 0x00000100L -#define LIBSKRIFT_ADVANCE_CHAR_TO_GRID 0x00000200L -#define LIBSKRIFT_REGRESS_CHAR_TO_GRID 0x00000400L /* Combine with LIBSKRIFT_ADVANCE_CHAR_TO_GRID for closest alternative */ -#define LIBSKRIFT_ADVANCE_WORD_TO_GRID 0x00000800L -#define LIBSKRIFT_REGRESS_WORD_TO_GRID 0x00001000L /* Combine with LIBSKRIFT_ADVANCE_WORD_TO_GRID for closest alternative */ -#define LIBSKRIFT_USE_SUBPIXEL_GRID 0x00002000L -#define LIBSKRIFT_VERTICAL_TEXT 0x00004000L -#define LIBSKRIFT_AUTOHINTING 0x00008000L /* Use autohinter even if hint information exists */ -#define LIBSKRIFT_NO_AUTOHINTING 0x00010000L /* Use autohinter if no hint information exist */ -#define LIBSKRIFT_AUTOKERNING 0x00020000L /* Use autokerner even if kerning information exists */ -#define LIBSKRIFT_NO_AUTOKERNING 0x00040000L /* Use autokerner if no kerning information exist */ +#define LIBSKRIFT_REMOVE_GAMMA UINT32_C(0x00000001) +#define LIBSKRIFT_Y_INCREASES_UPWARDS UINT32_C(0x00000002) /* SFT_DOWNWARD_Y otherwise */ +#define LIBSKRIFT_FLIP_TEXT UINT32_C(0x00000004) +#define LIBSKRIFT_FLIP_CHARS UINT32_C(0x00000008) +#define LIBSKRIFT_MIRROR_TEXT UINT32_C(0x00000010) +#define LIBSKRIFT_MIRROR_CHARS UINT32_C(0x00000020) +#define LIBSKRIFT_TRANSPOSE_TEXT UINT32_C(0x00000040) +#define LIBSKRIFT_TRANSPOSE_CHARS UINT32_C(0x00000080) +#define LIBSKRIFT_NO_LIGATURES UINT32_C(0x00000100) +#define LIBSKRIFT_ADVANCE_CHAR_TO_GRID UINT32_C(0x00000200) +#define LIBSKRIFT_REGRESS_CHAR_TO_GRID UINT32_C(0x00000400) /* Combine with LIBSKRIFT_ADVANCE_CHAR_TO_GRID for closest alternative */ +#define LIBSKRIFT_ADVANCE_WORD_TO_GRID UINT32_C(0x00000800) +#define LIBSKRIFT_REGRESS_WORD_TO_GRID UINT32_C(0x00001000) /* Combine with LIBSKRIFT_ADVANCE_WORD_TO_GRID for closest alternative */ +#define LIBSKRIFT_USE_SUBPIXEL_GRID UINT32_C(0x00002000) +#define LIBSKRIFT_VERTICAL_TEXT UINT32_C(0x00004000) +#define LIBSKRIFT_AUTOHINTING UINT32_C(0x00008000) /* Use autohinter even if hint information exists */ +#define LIBSKRIFT_NO_AUTOHINTING UINT32_C(0x00010000) /* Use autohinter if no hint information exist */ +#define LIBSKRIFT_AUTOKERNING UINT32_C(0x00020000) /* Use autokerner even if kerning information exists */ +#define LIBSKRIFT_NO_AUTOKERNING UINT32_C(0x00040000) /* Use autokerner if no kerning information exist */ struct libskrift_rendering { int struct_version; @@ -272,4 +273,85 @@ void libskrift_srgb_preprocess(struct libskrift_image *, size_t, size_t, size_t, _LIBSKRIFT_GCC_ONLY(__attribute__((__nonnull__))) void libskrift_srgb_postprocess(struct libskrift_image *, size_t, size_t, size_t, size_t); + +inline void +libskrift_add_transformation(double m[restrict 6], const double tm[restrict 6]) +{ + double a = m[0], b = m[1], c = m[2]; + double d = m[3], e = m[4], f = m[5]; + m[0] = tm[0] * a + tm[1] * d; + m[1] = tm[0] * b + tm[1] * e; + m[2] = tm[0] * c + tm[1] * f + tm[2]; + m[3] = tm[3] * a + tm[4] * d; + m[4] = tm[3] * b + tm[4] * e; + m[5] = tm[3] * c + tm[4] * f + tm[5]; +} + +inline void +libskrift_add_rotation(double m[6], double radians) +{ + double c = cos(-radians), s = sin(-radians); + libskrift_add_transformation(m, (double []){c, -s, 0, s, c, 0}); +} + +inline void +libskrift_add_rotation_degrees(double m[6], double degrees) +{ + libskrift_add_rotation(m, degrees * (double)0.017453292519943295f); +} + +inline void +libskrift_add_90_degree_rotation(double m[6]) +{ + double a = m[0], b = m[1], c = m[2]; + m[0] = m[3], m[1] = m[4], m[2] = m[5]; + m[3] = -a, m[4] = -b, m[5] = -c; +} + +inline void +libskrift_add_180_degree_rotation(double m[6]) +{ + m[0] = -m[0], m[1] = -m[1], m[2] = -m[2]; + m[3] = -m[3], m[4] = -m[4], m[5] = -m[5]; +} + +inline void +libskrift_add_270_degree_rotation(double m[6]) +{ + double a = m[0], b = m[1], c = m[2]; + m[0] = -m[3], m[1] = -m[4], m[2] = -m[5]; + m[3] = a, m[4] = b, m[5] = c; +} + +inline void +libskrift_add_scaling(double m[6], double x, double y) +{ + m[0] *= x, m[1] *= x, m[2] *= x; + m[3] *= y, m[4] *= y, m[5] *= y; +} + +inline void +libskrift_add_transposition(double m[6]) +{ + double a = m[0], b = m[1], c = m[2]; + m[0] = m[3], m[1] = m[4], m[2] = m[5]; + m[3] = a, m[4] = b, m[5] = c; +} + +inline void +libskrift_add_shear(double m[6], double x, double y) +{ + double a = m[0], b = m[1], c = m[2]; + double d = m[3], e = m[4], f = m[6]; + m[0] += x * d, m[1] += x * e, m[2] += x * f; + m[3] += y * a, m[4] += y * b, m[5] += y * c; +} + +inline void +libskrift_add_translation(double m[6], double x, double y) +{ + m[2] += x; + m[5] += y; +} + #endif |