unit.c File Reference

#include <libcss/stylesheet.h>
#include "utils/utils.h"
#include "propget.h"
#include "unit.h"

Functions
css_fixed	css_unit_font_size_len2pt (const css_computed_style *style, const css_unit_ctx *ctx, const css_fixed length, const css_unit unit)
css_fixed	css_unit_len2px_mq (const css_unit_ctx *ctx, const css_fixed length, const css_unit unit)
css_fixed	css_unit_len2css_px (const css_computed_style *style, const css_unit_ctx *ctx, const css_fixed length, const css_unit unit)
css_fixed	css_unit_len2device_px (const css_computed_style *style, const css_unit_ctx *ctx, const css_fixed length, const css_unit unit)
css_error	css_unit_compute_absolute_font_size (const css_hint_length *ref_length, const css_computed_style *root_style, css_fixed font_size_default, css_hint *size)
css_fixed	css_unit_angle2deg (const css_unit unit, const css_fixed angle)

Function Documentation

css_unit_angle2deg()

css_fixed css_unit_angle2deg	(	const css_unit	unit,
		const css_fixed	angle
	)

Convert any angle to degrees.

It is invalid to call this with a unit which isn't of UNIT_ANGLE

Parameters

[in]	unit	The unit the angle is in
[in]	angle	The angle to convert

Returns

the angle in degrees

css_unit_compute_absolute_font_size()

css_error css_unit_compute_absolute_font_size	(	const css_hint_length *	ref_length,
		const css_computed_style *	root_style,
		css_fixed	font_size_default,
		css_hint *	size
	)

Convert relative font size units to absolute units.

Parameters

[in]	ref_length	Reference font-size length or NULL.
[in]	root_style	Root element style or NULL.
[in]	font_size_default	Client default font size in CSS pixels.
[in,out]	size	The length to convert.

Returns

CSS_OK on success, or appropriate error otherwise.

css_unit_font_size_len2pt()

css_fixed css_unit_font_size_len2pt	(	const css_computed_style *	style,
		const css_unit_ctx *	ctx,
		const css_fixed	length,
		const css_unit	unit
	)

Convert a length to points (pt).

Parameters

[in]	style	Style to perform conversion for or NULL.
[in]	ctx	Length unit conversion context.
[in]	length	Length to convert.
[in]	unit	Current unit of length.

Returns

A length in points.

css_unit_len2css_px()

css_fixed css_unit_len2css_px	(	const css_computed_style *	style,
		const css_unit_ctx *	ctx,
		const css_fixed	length,
		const css_unit	unit
	)

Convert a length to CSS pixels.

Parameters

[in]	style	Style to perform conversion for or NULL.
[in]	ctx	Length unit conversion context.
[in]	length	Length to convert.
[in]	unit	Current unit of length.

Returns

A length in CSS pixels.

css_unit_len2device_px()

css_fixed css_unit_len2device_px	(	const css_computed_style *	style,
		const css_unit_ctx *	ctx,
		const css_fixed	length,
		const css_unit	unit
	)

Convert a length to device pixels.

Parameters

[in]	style	Style to perform conversion for or NULL.
[in]	ctx	Length unit conversion context.
[in]	length	Length to convert.
[in]	unit	Current unit of length.

Returns

A length in device pixels.

css_unit_len2px_mq()

css_fixed css_unit_len2px_mq	(	const css_unit_ctx *	ctx,
		const css_fixed	length,
		const css_unit	unit
	)

Convert a length to CSS pixels for a media query context.

Parameters

[in]	ctx	Document unit conversion context.
[in]	length	Length to convert.
[in]	unit	Current unit of length.

Returns

A length in CSS pixels.