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Added the ability to directly generate hex .h files from the compressed font data

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This commit is contained in:
Laurence Bank
2025-01-04 12:18:14 +00:00
parent 7ec3caff3a
commit 520f15fdc0
1 changed files with 51 additions and 8 deletions
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fontconvert/fontconvert.c
+51 -8
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@@ -88,6 +88,39 @@ int RotateBitmap(int iAngle, uint8_t *pSrc, int iWidth, int iHeight, int iSrcPit
}
return iDstPitch;
} /* RotateBitmap() */
//
// Create the comments and const array boilerplate for the hex data bytes
//
void StartHexFile(FILE *f, int iLen, const char *fname)
{
int i;
char szTemp[256];
fprintf(f, "//\n// Created with fontconvert, written by Larry Bank\n");
fprintf(f, "// compressed font data size = %d bytes\n//\n", iLen);
strcpy(szTemp, fname);
i = strlen(szTemp);
if (szTemp[i-2] == '.') szTemp[i-2] = 0; // get the leaf name for the data
fprintf(f, "const uint8_t %s[] = {\n", szTemp);
} /* StartHexFile() */
//
// Add N bytes of hex data to the output
// The data will be arranged in rows of 16 bytes each
//
void AddHexBytes(FILE *f, void *pData, int iLen, int bLast)
{
static int iCount = 0; // number of bytes processed so far
int i;
uint8_t *s = (uint8_t *)pData;
for (i=0; i<iLen; i++) { // process the given data
fprintf(f, "0x%02x", *s++);
iCount++;
if (i < iLen-1 || !bLast) fprintf(f, ",");
if ((iCount & 15) == 0) fprintf(f, "\n"); // next row of 16
}
if (bLast) {
fprintf(f, "};\n");
}
} /* AddHexBytes() */
int main(int argc, char *argv[])
{
@@ -105,13 +138,16 @@ int main(int argc, char *argv[])
// BitBank Font structures
BB_GLYPH *pGlyphs;
BB_FONT bbff;
int bHFile; // flag indicating if the output will be a .H file of hex data
if (argc < 4) {
printf("Usage: %s <in.ttf> <out.bbf> point_size [first_char] [last_char] [rotation (90/180/270)]\n", argv[0]);
printf("Usage: %s <in.ttf> <out.bbf or out.h> point_size [first_char] [last_char] [rotation (90/180/270)]\n", argv[0]);
return 1;
}
size = atoi(argv[3]);
pTemp = (uint8_t *)argv[2] + strlen(argv[2]) - 1;
bHFile = (pTemp[0] == 'H' || pTemp[0] == 'h'); // output an H file?
if (argc == 5) {
last = atoi(argv[4]); // only ending character was provided
} else if (argc >= 6) {
@@ -255,13 +291,20 @@ int main(int argc, char *argv[])
} else {
bbff.height = (face->size->metrics.height >> 6);
}
fwrite(&bbff, 1, sizeof(bbff), fOut);
// Write the glyph table
fwrite(pGlyphs, (last-first+1), sizeof(BB_GLYPH), fOut);
// Write the compressed bitmap data
fwrite(pBitmap, 1, iOffset, fOut);
iLen = sizeof(bbff) + (last-first+1)*sizeof(BB_GLYPH) + iOffset;
if (bHFile) { // create an H file of hex values
StartHexFile(fOut, iLen, argv[2]);
AddHexBytes(fOut, &bbff, sizeof(bbff), 0);
AddHexBytes(fOut, pGlyphs, (last-first+1) * sizeof(BB_GLYPH), 0);
AddHexBytes(fOut, pBitmap, iOffset, 1);
} else {
fwrite(&bbff, 1, sizeof(bbff), fOut);
// Write the glyph table
fwrite(pGlyphs, (last-first+1), sizeof(BB_GLYPH), fOut);
// Write the compressed bitmap data
fwrite(pBitmap, 1, iOffset, fOut);
}
fflush(fOut);
iLen = ftell(fOut);
fclose(fOut); // done!
FT_Done_FreeType(library);
printf("Success!\nFont file size: %d bytes\n", iLen);