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Clean up font conversions

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This commit is contained in:
David Schmenk 2025-01-10 21:28:50 -08:00
parent 5c68a9c6ea
commit affba20a20
1 changed files with 41 additions and 76 deletions
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117
src/dhgr.tk/utils/gsfonconv.c
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@ -38,6 +38,10 @@ struct macfont {
//uint16_t rlocTable; // lastChar - firstChar + 3 : pixel offset of glyph in bitImage
//uint16_t owTable; lastChar - firstChar + 3 : offset/width table
};
struct gsfont *gsf;
struct macfont *macf;
int16_t *locTable;
uint16_t *owTable;
/*
* Bit reversals
*/
@ -45,6 +49,38 @@ unsigned char bitReverse[256];
unsigned char clrSwap[256];
unsigned char clrRot[] = {0x00,0x02,0x04,0x06,0x08,0x0A,0x0C,0x0E,
0x01,0x03,0x05,0x07,0x09,0x0B,0x0D,0x0F};
void write_lyph(FILE *fp, uint8_t *glyphBits, int glyphSpan, int offset, int width, int height)
{
uint32_t rowbits;
int byteOffset, bitShift, bitWidth, i;
byteOffset = offset / 8;
bitShift = offset & 7;
bitWidth = bitShift + width;
while (height--)
{
rowbits = bitReverse[glyphBits[byteOffset]];
if (bitWidth >= 8)
{
rowbits |= bitReverse[glyphBits[byteOffset + 1]] << 8;
if (bitWidth >= 16)
{
rowbits |= bitReverse[glyphBits[byteOffset + 2]] << 16;
if (bitWidth >= 24)
rowbits |= bitReverse[glyphBits[byteOffset + 3]] << 24;
}
}
rowbits >>= bitShift;
for (i = 0; i < width; i++)
{
putchar(rowbits & 1 ? '*' : ' ');
rowbits >>= 1;
}
puts("");
glyphBits += glyphSpan;
}
}
#if 0
void write_glyph(FILE *fp, int left, int top, int width, int height, int advance, unsigned char *buf, int pitch)
{
unsigned char glyphdef[5], *swapbuf;
@ -67,11 +103,12 @@ void write_glyph(FILE *fp, int left, int top, int width, int height, int advance
}
free(swapbuf);
}
void write_font_file(char *filename, int glyph_width, int glyph_height)
#endif
void write_font_file(char *filename)
{
FILE *fp;
unsigned char ch;
int c;
int glyph_width, glyph_height, c;
if ((fp = fopen(filename, "wb")))
{
@ -86,7 +123,6 @@ void write_font_file(char *filename, int glyph_width, int glyph_height)
for (c = GLYPH_FIRST; c <= GLYPH_LAST; c++)
{
#if 0
FT_Load_Char(face, c, FT_LOAD_RENDER | FT_LOAD_MONOCHROME);
write_glyph(fp,
face->glyph->bitmap_left,
face->glyph->bitmap_top,
@ -100,72 +136,6 @@ void write_font_file(char *filename, int glyph_width, int glyph_height)
fclose(fp);
}
}
/*
* Glyph render routines.
*/
void bitblt(int xorg, int yorg, int width, int height, unsigned char *srcbuf, int srcpitch, unsigned char *dstbuf, int dstpitch)
{
int i, j;
dstbuf = dstbuf + yorg * dstpitch;
width = (width + 7) / 8; // Width in bytes
for (j = 0; j < height; j++)
{
for (i = 0; i < width; i++)
dstbuf[i] = srcbuf[i];
srcbuf += srcpitch;
dstbuf += dstpitch;
}
}
void write_bitmap_file(char *filename, int glyph_width, int glyph_height)
{
int bitmap_top, bitmap_rows;
int c, glyph_base, glyph_byte_width, glyph_pitch;
unsigned char *glyph_buf, *bitmap_buf;
FILE *fp;
#if 0
glyph_base = glyph_height * 3 / 4 ; //+ 1;
glyph_width = glyph_width * 1.25;
glyph_byte_width = (glyph_width + 7) / 8;
glyph_pitch = GLYPH_COUNT * glyph_byte_width;
glyph_buf = malloc(glyph_pitch * glyph_height);
memset(glyph_buf, 0, glyph_pitch * glyph_height);
for (c = GLYPH_FIRST; c <= GLYPH_LAST; c++)
{
FT_Load_Char(face, c, FT_LOAD_RENDER | FT_LOAD_MONOCHROME);
bitmap_buf = face->glyph->bitmap.buffer,
bitmap_top = glyph_base - face->glyph->bitmap_top;
bitmap_rows = face->glyph->bitmap.rows;
if (bitmap_top < 0)
{
bitmap_rows += bitmap_top;
bitmap_buf = bitmap_buf - face->glyph->bitmap.pitch * bitmap_top;
bitmap_top = 0;
}
if (bitmap_top < glyph_height)
{
if (bitmap_top + bitmap_rows > glyph_height)
bitmap_rows = glyph_height - bitmap_top;
bitblt(0,
bitmap_top,
face->glyph->bitmap.width,
bitmap_rows,
bitmap_buf,
face->glyph->bitmap.pitch,
glyph_buf + (c - GLYPH_FIRST) * glyph_byte_width,
glyph_pitch);
}
else
printf("Glyph (%c) height: %d, top: %d, rows: %d Skipped!\n", c, glyph_height, face->glyph->bitmap_top, face->glyph->bitmap.rows);
}
if ((fp = fopen(filename, "wb")))
{
fprintf(fp, "P4\n%d\n%d\n", glyph_width * GLYPH_COUNT, glyph_height);
fwrite(glyph_buf, 1, glyph_pitch * glyph_height, fp);
fclose(fp);
}
#endif
}
void die(char *str)
{
fprintf(stderr,"error: %s\n", str);
@ -208,10 +178,6 @@ void load_iigs_file(char *filename)
char *fontdef;
char fontname[64];
int fontdefsize, i;
struct gsfont *gsf;
struct macfont *macf;
int16_t *locTable;
uint16_t *owTable;
if ((fp = fopen(filename, "rb")))
{
@ -220,7 +186,7 @@ void load_iigs_file(char *filename)
fclose(fp);
}
else
die("Unable to opern IIGS font file");
die("Unable to open IIGS font file");
memcpy(&fontname, fontdef + 1, fontdef[0]);
fontname[fontdef[0]] = '\0';
printf("Font name: %s\n", fontname);
@ -292,8 +258,7 @@ int main(int argc, char **argv)
* Load IIGS font file header.
*/
load_iigs_file(iigs_file);
write_bitmap_file(font_file, glyph_width, glyph_height);
//write_font_file(font_file, face, glyph_width, glyph_height);
write_font_file(font_file);
return 0;
}