10 |
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#include <string.h> |
11 |
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#include "bmpfile.h" |
12 |
|
|
13 |
+ |
#ifdef getc_unlocked /* avoid horrendous overhead of flockfile */ |
14 |
+ |
#define getc getc_unlocked |
15 |
+ |
#define putc putc_unlocked |
16 |
+ |
#endif |
17 |
+ |
|
18 |
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/* get corresponding error message */ |
19 |
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const char * |
20 |
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BMPerrorMessage(int ec) |
260 |
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return -1; |
261 |
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if (hdr->bpp > 8) /* assume they had a reason for it */ |
262 |
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return 0; |
263 |
< |
for (rgbp = hdr->palette, n = hdr->impColors; n-- > 0; rgbp++) |
263 |
> |
for (rgbp = hdr->palette, n = hdr->nColors; n-- > 0; rgbp++) |
264 |
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if (((rgbp->r != rgbp->g) | (rgbp->g != rgbp->b))) |
265 |
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return 0; |
266 |
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return 1; /* all colors neutral in map */ |
284 |
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* |
285 |
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* Certain aspects of this scheme are completely insane, so |
286 |
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* we don't support them. Fortunately, they rarely appear. |
287 |
< |
* One is the mid-file EOD (0x0001) and another is the insane |
287 |
> |
* One is the mid-file EOD (0x0001) and another is the ill-conceived |
288 |
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* "delta" (0x0002), which is like a "goto" statement for bitmaps. |
289 |
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* Whoever thought this up should be shot, then told why |
290 |
< |
* it's impossible to support in any reasonable way. |
290 |
> |
* it's impossible to support such a scheme in any reasonable way. |
291 |
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* Also, RLE4 mode allows runs to stop halfway through a byte, |
292 |
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* which is likewise uncodeable, so we don't even try. |
293 |
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* Finally, the scanline break is ambiguous -- we assume here that |
296 |
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* the end of the scanline, assuming the next bit of data belongs |
297 |
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* the following scan. If a break follows the last pixel, as it |
298 |
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* seems to in the files I've tested out of Photoshop, you end up |
299 |
< |
* painting every other line black. BTW, I assume any skipped |
299 |
> |
* painting every other line black. Also, I assume any skipped |
300 |
|
* pixels are painted with color 0, which is often black. Nowhere |
301 |
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* is it specified what we should assume for missing pixels. This |
302 |
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* is undoubtedly the most brain-dead format I've ever encountered. |
328 |
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case 0: /* end of line */ |
329 |
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while (n--) |
330 |
|
*sp++ = 0; |
331 |
+ |
/* leaves n == -1 as flag for test after loop */ |
332 |
|
continue; |
333 |
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case 1: /* end of bitmap */ |
334 |
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case 2: /* delta */ |
353 |
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return BIR_TRUNCATED; |
354 |
|
} |
355 |
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/* verify break at end of line */ |
356 |
< |
if (rdbyte(n, br) != 0 || (rdbyte(n, br) != 0 && |
357 |
< |
(n != 1 || br->yscan != br->hdr->height-1))) |
356 |
> |
if (!n && (rdbyte(n, br) != 0 || (rdbyte(n, br) != 0 && |
357 |
> |
(n != 1 || br->yscan != br->hdr->height-1)))) |
358 |
|
return BIR_RLERROR; |
359 |
|
if (br->seek != NULL) /* record next scanline position */ |
360 |
|
br->scanpos[br->yscan + 1] = br->fpos; |
605 |
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{ |
606 |
|
if (pos == bw->fpos) |
607 |
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return BIR_OK; |
608 |
< |
if (bw->seek == NULL) { |
609 |
< |
if (pos < bw->fpos) |
604 |
< |
return BIR_SEEKERR; |
605 |
< |
while (bw->fpos < pos) |
606 |
< |
wrbyte(0, bw); |
607 |
< |
return BIR_OK; |
608 |
< |
} |
608 |
> |
if (bw->seek == NULL) |
609 |
> |
return BIR_SEEKERR; |
610 |
|
if ((*bw->seek)(pos, bw->c_data) != 0) |
611 |
|
return BIR_SEEKERR; |
612 |
|
bw->fpos = pos; |
753 |
|
break; |
754 |
|
val = *sp; /* output run */ |
755 |
|
for (cnt = 1; cnt < 255; cnt++) |
756 |
< |
if (!--n | *++sp != val) |
756 |
> |
if ((!--n) | (*++sp != val)) |
757 |
|
break; |
758 |
|
wrbyte(cnt, bw); |
759 |
|
wrbyte(val, bw); |
761 |
|
bw->yscan++; /* write line break or EOD */ |
762 |
|
if (bw->yscan == bw->hdr->height) { |
763 |
|
wrbyte(0, bw); wrbyte(1, bw); /* end of bitmap marker */ |
764 |
< |
if (bw->seek == NULL || (*bw->seek)(2, bw->c_data) != 0) |
764 |
> |
if (wrseek(2, bw) != BIR_OK) |
765 |
|
return BIR_OK; /* no one may care */ |
766 |
< |
bw->fpos = 2; |
767 |
< |
wrint32(bw->flen-bw->fbmp, bw); /* output correct bitmap length */ |
766 |
> |
wrint32(bw->flen, bw); /* correct file length */ |
767 |
> |
if (wrseek(34, bw) != BIR_OK) |
768 |
> |
return BIR_OK; |
769 |
> |
wrint32(bw->flen-bw->fbmp, bw); /* correct bitmap length */ |
770 |
|
} else { |
771 |
|
wrbyte(0, bw); wrbyte(0, bw); /* end of line marker */ |
772 |
|
} |