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Better positioning of characters with smaller bounding box than font's bounding box, and using yoffset from both font and character

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This commit is contained in:
Louis Beaudoin 2014-09-10 20:53:47 -04:00
parent 7f6c27e802
commit f68c2384bd
1 changed files with 23 additions and 11 deletions
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34
bdf2c.c
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@ -3,7 +3,7 @@
///
/// Copyright (c) 2009, 2010 by Lutz Sammer. All Rights Reserved.
///
/// Contributor(s):
/// Contributor(s):
///
/// License: AGPLv3
///
@ -206,21 +206,25 @@ void Footer(FILE * out, const char *name, int width, int height, int chars)
///
/// Dump character.
///
/// @param out file stream for output
/// @param bitmap input bitmap
/// @param width character width
/// @param height character height
///
void DumpCharacter(FILE * out, unsigned char *bitmap, int width, int height)
void DumpCharacter(FILE * out, unsigned char *bitmap, int fontwidth, int fontheight, int fontyoffset, int charheight, int charyoffset)
{
int x;
int y;
int c;
for (y = 0; y < height; ++y) {
// how many rows from the top of the font bounding box is the top of this character?
int yoffset = fontheight - charheight + (fontyoffset - charyoffset);
for (y = 0; y < fontheight; ++y) {
fputc('\t', out);
for (x = 0; x < width; x += 8) {
c = bitmap[y * ((width + 7) / 8) + x / 8];
for (x = 0; x < fontwidth; x += 8) {
// if current row is above or below the bitmap, output a blank row
if(y < yoffset || y > yoffset + charheight)
c = 0;
else
c = bitmap[(y - yoffset) * ((fontwidth + 7) / 8) + x / 8];
//printf("%d = %d\n", y * ((width+7)/8) + x/8, c);
if (c & 0x80) {
fputc('X', out);
@ -378,6 +382,8 @@ void ReadBdf(FILE * bdf, FILE * out, const char *name)
char *p;
int fontboundingbox_width;
int fontboundingbox_height;
int fontboundingbox_xoff;
int fontboundingbox_yoff;
int chars;
int i;
int j;
@ -396,6 +402,8 @@ void ReadBdf(FILE * bdf, FILE * out, const char *name)
fontboundingbox_width = 0;
fontboundingbox_height = 0;
fontboundingbox_xoff = 0;
fontboundingbox_yoff = 0;
chars = 0;
for (;;) {
if (!fgets(linebuf, sizeof(linebuf), bdf)) { // EOF
@ -410,6 +418,10 @@ void ReadBdf(FILE * bdf, FILE * out, const char *name)
fontboundingbox_width = atoi(p);
p = strtok(NULL, " \t\n\r");
fontboundingbox_height = atoi(p);
p = strtok(NULL, " \t\n\r");
fontboundingbox_xoff = atoi(p);
p = strtok(NULL, " \t\n\r");
fontboundingbox_yoff = atoi(p);
} else if (!strcasecmp(s, "CHARS")) {
p = strtok(NULL, " \t\n\r");
chars = atoi(p);
@ -547,7 +559,7 @@ void ReadBdf(FILE * bdf, FILE * out, const char *name)
fontboundingbox_height);
}
DumpCharacter(out, bitmap, fontboundingbox_width,
fontboundingbox_height);
fontboundingbox_height, fontboundingbox_yoff, bbh, bby);
scanline = -1;
width = INT_MIN;
} else {
@ -564,7 +576,7 @@ void ReadBdf(FILE * bdf, FILE * out, const char *name)
7) / 8)] = i;
break;
}
/* printf("%d = %d\n",
/* printf("%d = %d\n",
j + scanline * ((fontboundingbox_width + 7)/8), i); */
bitmap[j + scanline * ((fontboundingbox_width + 7) / 8)] =
i;