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Calculate the width of a uint16_t string of Unicode characters
#include <photon/Pf.h>
int PfWideTextWidthChars( const char *font,
const uint16_t *str,
int len );
- font
- The name of the desired font.
Use
PfGenerateFontName()
to create the name.
- str
- A uint16_t string of Unicode characters.
- len
- The number of characters in the string.
If len is 0, strlen(str) is assumed.
ph
PfWideTextWidthChars() is a convenience function that calculates
the width of the given string in the given font, using the formula:
extent.lr.x - min(extent.ul.x, 0) + 1
|
This function assumes each character is represented
by 2 bytes that conform to the ISO/IEC 10646-1 UCS-2
double-byte format. |
PfWideTextWidthBytes()
is similar, but you pass it the number of bytes in the string, rather than the
number of characters.
The width of the string, or 0 if an error occurred.
Photon
Safety: | |
Interrupt handler |
No |
Signal handler |
No |
Thread |
No |
PfTextWidthBytes()
PfTextWidthChars()
PfWideTextWidthBytes()
Fonts
chapter of the Photon Programmer's Guide
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