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XBMFont.cpp
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XBMFont.cpp
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#include "XBMFont.h"
#define BMP_STRIP_FLAG_0 0x01
#define BMP_STRIP_FLAG_96 0x02
#define BMP_STRIP_FLAG_160 0x04
XBMFont::XBMFont(unsigned int width, unsigned int height, unsigned char * chars, unsigned int bmp_strip_mask) {
this->width = width;
this->height = height;
this->chars = chars;
this->bmp_strip_mask = bmp_strip_mask;
}
unsigned int XBMFont::getWidth() {
return this->width;
}
unsigned int XBMFont::getHeight() {
return this->height;
}
unsigned char * XBMFont::charAt(int index) {
return this->chars + this->height * index;
}
unsigned char * XBMFont::getBitmap(char c) {
unsigned int i = (unsigned int) c;
unsigned int j = i;
// strip 0..31 ?
if (bmp_strip_mask & BMP_STRIP_FLAG_0) {
if (i < 32)
return this->charAt(0);
j -= 32;
}
if (i < 96)
return this->charAt(j);
// strip 96..127 ?
if (bmp_strip_mask & BMP_STRIP_FLAG_96)
j -= 32; // map smallcaps on bigcaps
if (i < 128)
return this->charAt(j);
// strip 128..159
if (i < 160)
return this->charAt(0);
j -= 32;
// strip 160..255 ?
if (bmp_strip_mask & BMP_STRIP_FLAG_160)
return this->charAt(0);
return this->charAt(j);
}
unsigned char XBMFont::getLine(char c, unsigned int line) {
if (line >= this->height)
line = this->height -1;
return this->getBitmap(c)[line];
}
bool XBMFont::getPixel(char c, unsigned int line, unsigned int column) {
if (column >= this->width)
column = 0;
unsigned char bits = this->getLine(c,line);
return bits & (1 << column);
}