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Added support for ASCII PNM files. Note I haven't tested loaded ASCII PBM

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1999-11-08  Michael Fulbright  <drmike@redhat.com>

	* src/io-pnm.c pnm_read_ascii_scanline (): Added support for
	ASCII PNM files. Note I haven't tested loaded ASCII PBM files because
	I can't seem to find a utility to convert into this format.
	Next is to add progressive loading support for the PNM format.
This commit is contained in:
Michael Fulbright 1999-11-08 17:15:19 +00:00 committed by Michael Fulbright
parent e11f22b55e
commit 6ef7f093d4
2 changed files with 55 additions and 63 deletions
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7
gdk-pixbuf/ChangeLog
View File

@ -1,3 +1,10 @@
1999-11-08 Michael Fulbright <drmike@redhat.com>
* src/io-pnm.c pnm_read_ascii_scanline (): Added support for
ASCII PNM files. Note I haven't tested loaded ASCII PBM files because
I can't seem to find a utility to convert into this format.
Next is to add progressive loading support for the PNM format.
1999-11-07 Federico Mena Quintero <federico@redhat.com>
* doc/tmpl/gnome-canvas-pixbuf.sgml: Finished detailed explanation

111
gdk-pixbuf/io-pnm.c
View File

@ -329,8 +329,6 @@ pnm_read_header (PnmLoaderContext *context)
return PNM_FATAL_ERR;
}
g_print ("File format is %d\n", type);
context->type = type;
inbuf->next_byte += 2;
@ -349,8 +347,6 @@ pnm_read_header (PnmLoaderContext *context)
return PNM_SUSPEND;
}
g_print ("Dimensions are %d x %d\n", w, h);
context->width = w;
context->height = h;
@ -364,8 +360,6 @@ pnm_read_header (PnmLoaderContext *context)
inbuf->bytes_left = old_bytes_left;
return PNM_SUSPEND;
}
g_print ("Maximum component value is %d\n", context->maxval);
break;
default:
break;
@ -454,8 +448,7 @@ pnm_read_raw_scanline (PnmLoaderContext *context)
static gint
pnm_read_ascii_scanline (PnmLoaderContext *context)
{
guint numpix;
guint numbytes, offset;
guint offset;
gint rc;
guint value, numval, i;
guchar data;
@ -473,15 +466,16 @@ pnm_read_ascii_scanline (PnmLoaderContext *context)
switch (context->type) {
case PNM_FORMAT_PBM:
mask = 0x80;
data = 0;
numval = 8;
offset = context->output_col/8;
break;
case PNM_FORMAT_PGM:
numval = 1;
offset = context->output_col;
break;
case PNM_FORMAT_PPM:
numval = 3;
offset = context->output_col*3;
break;
default:
@ -489,53 +483,57 @@ pnm_read_ascii_scanline (PnmLoaderContext *context)
return PNM_FATAL_ERR;
}
old_next_byte = inbuf->next_byte;
old_bytes_left = inbuf->bytes_left;
dptr = context->dptr;
dptr = context->dptr + offset;
for (i=0; i<numval; i++) {
if ((rc = read_next_number (inbuf, &value))) {
inbuf->next_byte = old_next_byte;
inbuf->bytes_left = old_bytes_left;
return PNM_SUSPEND;
while (TRUE) {
if (context->type == PNM_FORMAT_PBM) {
mask = 0x80;
data = 0;
}
printf ("0x%x ", value);
fflush (stdout);
switch (context->type) {
case PNM_FORMAT_PBM:
if (value)
data |= mask;
mask >>= 1;
old_next_byte = inbuf->next_byte;
old_bytes_left = inbuf->bytes_left;
for (i=0; i<numval; i++) {
if ((rc = read_next_number (inbuf, &value))) {
inbuf->next_byte = old_next_byte;
inbuf->bytes_left = old_bytes_left;
return PNM_SUSPEND;
}
switch (context->type) {
case PNM_FORMAT_PBM:
if (value)
data |= mask;
mask >>= 1;
break;
case PNM_FORMAT_PGM:
*dptr++ = (guchar)(255.0*((double)value/(double)context->maxval));
break;
case PNM_FORMAT_PPM:
*dptr++ = (guchar)(255.0*((double)value/(double)context->maxval));
break;
default:
g_warning ("io-pnm.c: Illegal raw pnm type!\n");
break;
case PNM_FORMAT_PGM:
*dptr++ = (guchar)(255.0*((double)value/(double)context->maxval));
break;
case PNM_FORMAT_PPM:
*dptr++ = (guchar)(255.0*((double)value/(double)context->maxval));
break;
default:
g_warning ("io-pnm.c: Illegal raw pnm type!\n");
break;
}
}
if (context->type == PNM_FORMAT_PBM)
*dptr++ = value;
context->output_col++;
if (context->output_col == context->width) {
if ( context->type == PNM_FORMAT_PBM )
explode_bitmap_into_buf(context);
else if ( context->type == PNM_FORMAT_PGM )
explode_gray_into_buf (context);
context->output_col = 0;
context->output_row++;
break;
}
}
if (context->type == PNM_FORMAT_PBM)
*dptr++ = value;
context->output_col++;
if (context->output_col == context->width) {
if ( context->type == PNM_FORMAT_PBM_RAW )
explode_bitmap_into_buf(context);
else if ( context->type == PNM_FORMAT_PGM_RAW )
explode_gray_into_buf (context);
context->output_col = 0;
context->output_row++;
} else {
return PNM_SUSPEND;
}
return PNM_OK;
@ -563,14 +561,10 @@ pnm_read_scanline (PnmLoaderContext *context)
case PNM_FORMAT_PBM:
case PNM_FORMAT_PGM:
case PNM_FORMAT_PPM:
#if 0
rc = pnm_read_ascii_scanline (context);
if (rc == PNM_SUSPEND)
return rc;
break;
#endif
default:
g_print ("Cannot load these image types (yet)\n");
@ -590,11 +584,6 @@ image_load (FILE *f)
PnmLoaderContext context;
PnmIOBuffer *inbuf;
#if 0
G_BREAKPOINT();
#endif
/* pretend to be doing progressive loading */
context.updated_func = context.prepared_func = NULL;
context.user_data = NULL;
@ -643,8 +632,6 @@ image_load (FILE *f)
/* scan until we hit image data */
if (!context.did_prescan) {
g_print ("doing prescan\n");
if (skip_ahead_whitespace (inbuf) == NULL)
continue;
@ -656,8 +643,6 @@ image_load (FILE *f)
context.width * 3);
if (!context.pixels)
return NULL;
g_print ("prescan complete\n");
}
/* if we got here we're reading image data */