diff options
Diffstat (limited to 'css/css.c')
| -rw-r--r-- | css/css.c | 28 |
1 files changed, 28 insertions, 0 deletions
@@ -2976,6 +2976,8 @@ unsigned int css_hash(const char *s, int length) /** * Convert a struct css_length to pixels. + * + * Note: This assumes 90dpi (if converting from points) */ float css_len2px(const struct css_length *length, @@ -2999,6 +3001,32 @@ float css_len2px(const struct css_length *length, return 0; } +/** + * Convert a struct css_length to points. + * + * Note: This assumes 90dpi (if converting a pixel size) + */ + +float css_len2pt(const struct css_length *length, + const struct css_style *style) +{ + assert(!((length->unit == CSS_UNIT_EM || length->unit == CSS_UNIT_EX) && style == 0)); + switch (length->unit) { + case CSS_UNIT_EM: return length->value * css_len2pt(&style->font_size.value.length, 0); + case CSS_UNIT_EX: return length->value * css_len2pt(&style->font_size.value.length, 0) * 0.6; + /* RISC OS assumes 90dpi */ + case CSS_UNIT_PX: return length->value / 1.25; + /* 1pt = 1in/72 */ + case CSS_UNIT_IN: return length->value * 72; + case CSS_UNIT_CM: return length->value * 28.452756; + case CSS_UNIT_MM: return length->value * 2.8452756; + case CSS_UNIT_PT: return length->value; + /* 1pc = 1pt * 12 */ + case CSS_UNIT_PC: return length->value * 12.0; + default: break; + } + return 0; +} /** * Return the most 'eyecatching' border. |