harmony 鸿蒙OH_Drawing_Font_Metrics
OH_Drawing_Font_Metrics
Overview
The OH_Drawing_Font_Metrics struct describes the measurement information about a font.
Since: 12
Related module: Drawing
Header file: drawing_font.h
Summary
Member Variables
| Name | Description |
|---|---|
| uint32_t flags | Measurement information that is valid. |
| float top | Maximum distance from the baseline to the highest coordinate of a character. |
| float ascent | Recommended distance from the baseline to the highest coordinate of a character. |
| float descent | Recommended distance from the baseline to the lowest coordinate of a character. |
| float bottom | Maximum distance from the baseline to the lowest coordinate of a character. |
| float leading | Interline spacing. |
| float avgCharWidth | Average character width, or zero if unknown. |
| float maxCharWidth | Maximum character width, or zero if unknown. |
| float xMin | Maximum distance to the leftmost of the font bounding box. Generally, the value is a negative value. Variable fonts are not recommended. |
| float xMax | Maximum distance to the rightmost of the font bounding box. Generally, the value is a negative value. Variable fonts are not recommended. |
| float xHeight | Height of a lowercase letter, or zero if unknown. Generally, the value is a negative value. |
| float capHeight | Height of an uppercase letter, or zero if unknown. Generally, the value is a negative value. |
| float underlineThickness | Thickness of the underline. |
| float underlinePosition | Position of the underline, that is, vertical distance from the baseline to the top of the underline. Generally, the value is a positive value. |
| float strikeoutThickness | Thickness of the strikethrough. |
| float strikeoutPosition | Position of the strikethrough, that is, vertical distance from the baseline to the bottom of the strikethrough. Generally, the value is a negative value. |
Member Variable Description
ascent
float OH_Drawing_Font_Metrics::ascent
Description
Recommended distance from the baseline to the highest coordinate of a character.
avgCharWidth
float OH_Drawing_Font_Metrics::avgCharWidth
Description
Average character width, or zero if unknown.
bottom
float OH_Drawing_Font_Metrics::bottom
Description
Maximum distance from the baseline to the lowest coordinate of a character.
capHeight
float OH_Drawing_Font_Metrics::capHeight
Description
Height of an uppercase letter, or zero if unknown. Generally, the value is a negative value.
descent
float OH_Drawing_Font_Metrics::descent
Description
Recommended distance from the baseline to the lowest coordinate of a character.
flags
uint32_t OH_Drawing_Font_Metrics::flags
Description
Measurement information that is valid.
leading
float OH_Drawing_Font_Metrics::leading
Description
Interline spacing.
maxCharWidth
float OH_Drawing_Font_Metrics::maxCharWidth
Description
Maximum character width, or zero if unknown.
strikeoutPosition
float OH_Drawing_Font_Metrics::strikeoutPosition
Description
Position of the strikethrough, that is, vertical distance from the baseline to the bottom of the strikethrough. Generally, the value is a negative value.
strikeoutThickness
float OH_Drawing_Font_Metrics::strikeoutThickness
Description
Thickness of the strikethrough.
top
float OH_Drawing_Font_Metrics::top
Description
Maximum distance from the baseline to the highest coordinate of a character.
underlinePosition
float OH_Drawing_Font_Metrics::underlinePosition
Description
Position of the underline, that is, vertical distance from the baseline to the top of the underline. Generally, the value is a positive value.
underlineThickness
float OH_Drawing_Font_Metrics::underlineThickness
Description
Thickness of the underline.
xHeight
float OH_Drawing_Font_Metrics::xHeight
Description
Height of a lowercase letter, or zero if unknown. Generally, the value is a negative value.
xMax
float OH_Drawing_Font_Metrics::xMax
Description
Maximum distance to the rightmost of the font bounding box. Generally, the value is a negative value. Variable fonts are not recommended.
xMin
float OH_Drawing_Font_Metrics::xMin
Description
Maximum distance to the leftmost of the font bounding box. Generally, the value is a negative value. Variable fonts are not recommended.
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