-#include "image.h"
-#include "io.h"
+#include "imager.h"
#include "log.h"
#include "iolayer.h"
+#include "imageri.h"
#include <stdlib.h>
#include <errno.h>
=head1 SYNOPSIS
io_glue *ig = io_new_fd( fd );
- i_img *im = i_readpnm_wiol(ig, -1); // no limit on how much is read
+ i_img *im = i_readpnm_wiol(ig, 0); // no limit on how much is read
// or
io_glue *ig = io_new_fd( fd );
return_code = i_writepnm_wiol(im, ig);
Some of these functions are internal.
-=over 4
+=over
=cut
*/
-#define BSIZ 1024
#define misspace(x) (x==' ' || x=='\n' || x=='\r' || x=='\t' || x=='\f' || x=='\v')
#define misnumber(x) (x <= '9' && x>='0')
static char *typenames[]={"ascii pbm", "ascii pgm", "ascii ppm", "binary pbm", "binary pgm", "binary ppm"};
/*
- * Type to encapsulate the local buffer
- * management skipping over in a file
- */
-
-typedef struct {
- io_glue *ig;
- int len;
- int cp;
- char buf[BSIZ];
-} mbuf;
-
-
-static
-void init_buf(mbuf *mb, io_glue *ig) {
- mb->len = 0;
- mb->cp = 0;
- mb->ig = ig;
-}
-
-
-
-/*
-=item gnext(mbuf *mb)
-
-Fetches a character and advances in stream by one character.
-Returns a pointer to the byte or NULL on failure (internal).
-
- mb - buffer object
-
-=cut
-*/
-
-static
-char *
-gnext(mbuf *mb) {
- io_glue *ig = mb->ig;
- if (mb->cp == mb->len) {
- mb->cp = 0;
- mb->len = ig->readcb(ig, mb->buf, BSIZ);
- if (mb->len == -1) {
- i_push_error(errno, "file read error");
- mm_log((1, "i_readpnm: read error\n"));
- return NULL;
- }
- if (mb->len == 0) {
- i_push_error(errno, "unexpected end of file");
- mm_log((1, "i_readpnm: end of file\n"));
- return NULL;
- }
- }
- return &mb->buf[mb->cp++];
-}
-
-
-/*
-=item gnext(mbuf *mb)
-
-Fetches a character but does NOT advance. Returns a pointer to
-the byte or NULL on failure (internal).
-
- mb - buffer object
-
-=cut
-*/
-
-static
-char *
-gpeek(mbuf *mb) {
- io_glue *ig = mb->ig;
- if (mb->cp == mb->len) {
- mb->cp = 0;
- mb->len = ig->readcb(ig, mb->buf, BSIZ);
- if (mb->len == -1) {
- i_push_error(errno, "read error");
- mm_log((1, "i_readpnm: read error\n"));
- return NULL;
- }
- if (mb->len == 0) {
- i_push_error(0, "unexpected end of file");
- mm_log((1, "i_readpnm: end of file\n"));
- return NULL;
- }
- }
- return &mb->buf[mb->cp];
-}
-
-
-
-
-/*
-=item skip_spaces(mb)
+=item skip_spaces(ig)
Advances in stream until it is positioned at a
non white space character. (internal)
- mb - buffer object
+ ig - io_glue
=cut
*/
static
int
-skip_spaces(mbuf *mb) {
- char *cp;
- while( (cp = gpeek(mb)) && misspace(*cp) ) if ( !gnext(mb) ) break;
- if (!cp) return 0;
+skip_spaces(io_glue *ig) {
+ int c;
+ while( (c = i_io_peekc(ig)) != EOF && misspace(c) ) {
+ if ( i_io_getc(ig) == EOF )
+ break;
+ }
+ if (c == EOF)
+ return 0;
+
return 1;
}
/*
-=item skip_spaces(mb)
+=item skip_comment(ig)
Advances in stream over whitespace and a comment if one is found. (internal)
- mb - buffer object
+ ig - io_glue object
=cut
*/
static
int
-skip_comment(mbuf *mb) {
- char *cp;
+skip_comment(io_glue *ig) {
+ int c;
+
+ if (!skip_spaces(ig))
+ return 0;
- if (!skip_spaces(mb)) return 0;
+ if ((c = i_io_peekc(ig)) == EOF)
+ return 0;
- if (!(cp = gpeek(mb))) return 0;
- if (*cp == '#') {
- while( (cp = gpeek(mb)) && (*cp != '\n' && *cp != '\r') ) {
- if ( !gnext(mb) ) break;
+ if (c == '#') {
+ while( (c = i_io_peekc(ig)) != EOF && (c != '\n' && c != '\r') ) {
+ if ( i_io_getc(ig) == EOF )
+ break;
}
}
- if (!cp) return 0;
+ if (c == EOF)
+ return 0;
return 1;
}
static
int
-gnum(mbuf *mb, int *i) {
- char *cp;
+gnum(io_glue *ig, int *i) {
+ int c;
*i = 0;
- if (!skip_spaces(mb)) return 0;
-
- while( (cp = gpeek(mb)) && misnumber(*cp) ) {
- *i = *i*10+(*cp-'0');
- cp = gnext(mb);
+ if (!skip_spaces(ig)) return 0;
+
+ if ((c = i_io_peekc(ig)) == EOF)
+ return 0;
+ if (!misnumber(c))
+ return 0;
+ while( (c = i_io_peekc(ig)) != EOF && misnumber(c) ) {
+ int work = *i * 10 + (c - '0');
+ if (work < *i) {
+ /* overflow */
+ i_push_error(0, "integer overflow");
+ return 0;
+ }
+ *i = work;
+ i_io_nextc(ig);
}
+
return 1;
}
+static
+i_img *
+read_pgm_ppm_bin8(io_glue *ig, i_img *im, int width, int height,
+ int channels, int maxval, int allow_incomplete) {
+ i_color *line, *linep;
+ int read_size;
+ unsigned char *read_buf, *readp;
+ int x, y, ch;
+ int rounder = maxval / 2;
+
+ line = mymalloc(width * sizeof(i_color));
+ read_size = channels * width;
+ read_buf = mymalloc(read_size);
+ for(y=0;y<height;y++) {
+ linep = line;
+ readp = read_buf;
+ if (i_io_read(ig, read_buf, read_size) != read_size) {
+ myfree(line);
+ myfree(read_buf);
+ if (allow_incomplete) {
+ i_tags_setn(&im->tags, "i_incomplete", 1);
+ i_tags_setn(&im->tags, "i_lines_read", y);
+ return im;
+ }
+ else {
+ i_push_error(0, "short read - file truncated?");
+ i_img_destroy(im);
+ return NULL;
+ }
+ }
+ if (maxval == 255) {
+ for(x=0; x<width; x++) {
+ for(ch=0; ch<channels; ch++) {
+ linep->channel[ch] = *readp++;
+ }
+ ++linep;
+ }
+ }
+ else {
+ for(x=0; x<width; x++) {
+ for(ch=0; ch<channels; ch++) {
+ /* we just clamp samples to the correct range */
+ unsigned sample = *readp++;
+ if (sample > maxval)
+ sample = maxval;
+ linep->channel[ch] = (sample * 255 + rounder) / maxval;
+ }
+ ++linep;
+ }
+ }
+ i_plin(im, 0, width, y, line);
+ }
+ myfree(read_buf);
+ myfree(line);
+
+ return im;
+}
+
+static
+i_img *
+read_pgm_ppm_bin16(io_glue *ig, i_img *im, int width, int height,
+ int channels, int maxval, int allow_incomplete) {
+ i_fcolor *line, *linep;
+ int read_size;
+ unsigned char *read_buf, *readp;
+ int x, y, ch;
+ double maxvalf = maxval;
+
+ line = mymalloc(width * sizeof(i_fcolor));
+ read_size = channels * width * 2;
+ read_buf = mymalloc(read_size);
+ for(y=0;y<height;y++) {
+ linep = line;
+ readp = read_buf;
+ if (i_io_read(ig, read_buf, read_size) != read_size) {
+ myfree(line);
+ myfree(read_buf);
+ if (allow_incomplete) {
+ i_tags_setn(&im->tags, "i_incomplete", 1);
+ i_tags_setn(&im->tags, "i_lines_read", y);
+ return im;
+ }
+ else {
+ i_push_error(0, "short read - file truncated?");
+ i_img_destroy(im);
+ return NULL;
+ }
+ }
+ for(x=0; x<width; x++) {
+ for(ch=0; ch<channels; ch++) {
+ unsigned sample = (readp[0] << 8) + readp[1];
+ if (sample > maxval)
+ sample = maxval;
+ readp += 2;
+ linep->channel[ch] = sample / maxvalf;
+ }
+ ++linep;
+ }
+ i_plinf(im, 0, width, y, line);
+ }
+ myfree(read_buf);
+ myfree(line);
-/*
-=item i_readpnm_wiol(ig, length)
+ return im;
+}
-Retrieve an image and stores in the iolayer object. Returns NULL on fatal error.
+static
+i_img *
+read_pbm_bin(io_glue *ig, i_img *im, int width, int height, int allow_incomplete) {
+ i_palidx *line, *linep;
+ int read_size;
+ unsigned char *read_buf, *readp;
+ int x, y;
+ unsigned mask;
+
+ line = mymalloc(width * sizeof(i_palidx));
+ read_size = (width + 7) / 8;
+ read_buf = mymalloc(read_size);
+ for(y = 0; y < height; y++) {
+ if (i_io_read(ig, read_buf, read_size) != read_size) {
+ myfree(line);
+ myfree(read_buf);
+ if (allow_incomplete) {
+ i_tags_setn(&im->tags, "i_incomplete", 1);
+ i_tags_setn(&im->tags, "i_lines_read", y);
+ return im;
+ }
+ else {
+ i_push_error(0, "short read - file truncated?");
+ i_img_destroy(im);
+ return NULL;
+ }
+ }
+ linep = line;
+ readp = read_buf;
+ mask = 0x80;
+ for(x = 0; x < width; ++x) {
+ *linep++ = *readp & mask ? 1 : 0;
+ mask >>= 1;
+ if (mask == 0) {
+ ++readp;
+ mask = 0x80;
+ }
+ }
+ i_ppal(im, 0, width, y, line);
+ }
+ myfree(read_buf);
+ myfree(line);
- ig - io_glue object
- length - maximum length to read from data source, before closing it -1
- signifies no limit.
+ return im;
+}
-=cut
+/* unlike pgm/ppm pbm:
+ - doesn't require spaces between samples (bits)
+ - 1 (maxval) is black instead of white
*/
+static
+i_img *
+read_pbm_ascii(io_glue *ig, i_img *im, int width, int height, int allow_incomplete) {
+ i_palidx *line, *linep;
+ int x, y;
+
+ line = mymalloc(width * sizeof(i_palidx));
+ for(y = 0; y < height; y++) {
+ linep = line;
+ for(x = 0; x < width; ++x) {
+ int c;
+ skip_spaces(ig);
+ if ((c = i_io_getc(ig)) == EOF || (c != '0' && c != '1')) {
+ myfree(line);
+ if (allow_incomplete) {
+ i_tags_setn(&im->tags, "i_incomplete", 1);
+ i_tags_setn(&im->tags, "i_lines_read", y);
+ return im;
+ }
+ else {
+ if (c != EOF)
+ i_push_error(0, "invalid data for ascii pnm");
+ else
+ i_push_error(0, "short read - file truncated?");
+ i_img_destroy(im);
+ return NULL;
+ }
+ }
+ *linep++ = c == '0' ? 0 : 1;
+ }
+ i_ppal(im, 0, width, y, line);
+ }
+ myfree(line);
+ return im;
+}
+static
i_img *
-i_readpnm_wiol(io_glue *ig, int length) {
- i_img* im;
- int type;
+read_pgm_ppm_ascii(io_glue *ig, i_img *im, int width, int height, int channels,
+ int maxval, int allow_incomplete) {
+ i_color *line, *linep;
int x, y, ch;
- int width, height, maxval, channels, pcount;
- char *cp;
- unsigned char *uc;
- mbuf buf;
- i_color val;
- int mult;
+ int rounder = maxval / 2;
- i_clear_error();
+ line = mymalloc(width * sizeof(i_color));
+ for(y=0;y<height;y++) {
+ linep = line;
+ for(x=0; x<width; x++) {
+ for(ch=0; ch<channels; ch++) {
+ int sample;
+
+ if (!gnum(ig, &sample)) {
+ myfree(line);
+ if (allow_incomplete) {
+ i_tags_setn(&im->tags, "i_incomplete", 1);
+ i_tags_setn(&im->tags, "i_lines_read", 1);
+ return im;
+ }
+ else {
+ if (i_io_peekc(ig) != EOF)
+ i_push_error(0, "invalid data for ascii pnm");
+ else
+ i_push_error(0, "short read - file truncated?");
+ i_img_destroy(im);
+ return NULL;
+ }
+ }
+ if (sample > maxval)
+ sample = maxval;
+ linep->channel[ch] = (sample * 255 + rounder) / maxval;
+ }
+ ++linep;
+ }
+ i_plin(im, 0, width, y, line);
+ }
+ myfree(line);
- /* char *pp; */
+ return im;
+}
- mm_log((1,"i_readpnm(ig %p, length %d)\n", ig, length));
+static
+i_img *
+read_pgm_ppm_ascii_16(io_glue *ig, i_img *im, int width, int height,
+ int channels, int maxval, int allow_incomplete) {
+ i_fcolor *line, *linep;
+ int x, y, ch;
+ double maxvalf = maxval;
- /*
- pp = mymalloc(20);
-
- pp[-1]= 'c';
- pp[-2]= 'c';
-
- bndcheck_all();
+ line = mymalloc(width * sizeof(i_fcolor));
+ for(y=0;y<height;y++) {
+ linep = line;
+ for(x=0; x<width; x++) {
+ for(ch=0; ch<channels; ch++) {
+ int sample;
+
+ if (!gnum(ig, &sample)) {
+ myfree(line);
+ if (allow_incomplete) {
+ i_tags_setn(&im->tags, "i_incomplete", 1);
+ i_tags_setn(&im->tags, "i_lines_read", y);
+ return im;
+ }
+ else {
+ if (i_io_peekc(ig) != EOF)
+ i_push_error(0, "invalid data for ascii pnm");
+ else
+ i_push_error(0, "short read - file truncated?");
+ i_img_destroy(im);
+ return NULL;
+ }
+ }
+ if (sample > maxval)
+ sample = maxval;
+ linep->channel[ch] = sample / maxvalf;
+ }
+ ++linep;
+ }
+ i_plinf(im, 0, width, y, line);
+ }
+ myfree(line);
- myfree(pp);
+ return im;
+}
+
+/*
+=item i_readpnm_wiol(ig, allow_incomplete)
- mm_log((1, "Hack is exiting\n"));
+Retrieve an image and stores in the iolayer object. Returns NULL on fatal error.
+
+ ig - io_glue object
+ allow_incomplete - allows a partial file to be read successfully
+=cut
*/
-
- io_glue_commit_types(ig);
- init_buf(&buf, ig);
- cp = gnext(&buf);
+i_img *
+i_readpnm_wiol( io_glue *ig, int allow_incomplete) {
+ i_img* im;
+ int type;
+ int width, height, maxval, channels;
+ int c;
+
+ i_clear_error();
+ mm_log((1,"i_readpnm(ig %p, allow_incomplete %d)\n", ig, allow_incomplete));
+
+ c = i_io_getc(ig);
- if (!cp || *cp != 'P') {
+ if (c != 'P') {
i_push_error(0, "bad header magic, not a PNM file");
mm_log((1, "i_readpnm: Could not read header of file\n"));
return NULL;
}
- if ( !(cp = gnext(&buf)) ) {
+ if ((c = i_io_getc(ig)) == EOF ) {
mm_log((1, "i_readpnm: Could not read header of file\n"));
return NULL;
}
- type = *cp-'0';
+ type = c - '0';
if (type < 1 || type > 6) {
i_push_error(0, "unknown PNM file type, not a PNM file");
return NULL;
}
- if ( !(cp = gnext(&buf)) ) {
+ if ( (c = i_io_getc(ig)) == EOF ) {
mm_log((1, "i_readpnm: Could not read header of file\n"));
return NULL;
}
- if ( !misspace(*cp) ) {
+ if ( !misspace(c) ) {
i_push_error(0, "unexpected character, not a PNM file");
mm_log((1, "i_readpnm: Not a pnm file\n"));
return NULL;
/* Read sizes and such */
- if (!skip_comment(&buf)) {
+ if (!skip_comment(ig)) {
i_push_error(0, "while skipping to width");
mm_log((1, "i_readpnm: error reading before width\n"));
return NULL;
}
- if (!gnum(&buf, &width)) {
+ if (!gnum(ig, &width)) {
i_push_error(0, "could not read image width");
mm_log((1, "i_readpnm: error reading width\n"));
return NULL;
}
- if (!skip_comment(&buf)) {
+ if (!skip_comment(ig)) {
i_push_error(0, "while skipping to height");
mm_log((1, "i_readpnm: error reading before height\n"));
return NULL;
}
- if (!gnum(&buf, &height)) {
+ if (!gnum(ig, &height)) {
i_push_error(0, "could not read image height");
mm_log((1, "i_readpnm: error reading height\n"));
return NULL;
}
if (!(type == 1 || type == 4)) {
- if (!skip_comment(&buf)) {
+ if (!skip_comment(ig)) {
i_push_error(0, "while skipping to maxval");
mm_log((1, "i_readpnm: error reading before maxval\n"));
return NULL;
}
- if (!gnum(&buf, &maxval)) {
+ if (!gnum(ig, &maxval)) {
i_push_error(0, "could not read maxval");
mm_log((1, "i_readpnm: error reading maxval\n"));
return NULL;
}
+
+ if (maxval == 0) {
+ i_push_error(0, "maxval is zero - invalid pnm file");
+ mm_log((1, "i_readpnm: maxval is zero, invalid pnm file\n"));
+ return NULL;
+ }
+ else if (maxval > 65535) {
+ i_push_errorf(0, "maxval of %d is over 65535 - invalid pnm file",
+ maxval);
+ mm_log((1, "i_readpnm: maxval of %d is over 65535 - invalid pnm file\n", maxval));
+ return NULL;
+ }
} else maxval=1;
- if (!(cp = gnext(&buf)) || !misspace(*cp)) {
+ if ((c = i_io_getc(ig)) == EOF || !misspace(c)) {
i_push_error(0, "garbage in header, invalid PNM file");
mm_log((1, "i_readpnm: garbage in header\n"));
return NULL;
}
channels = (type == 3 || type == 6) ? 3:1;
- pcount = width*height*channels;
+
+ if (!i_int_check_image_file_limits(width, height, channels, sizeof(i_sample_t))) {
+ mm_log((1, "i_readpnm: image size exceeds limits\n"));
+ return NULL;
+ }
mm_log((1, "i_readpnm: (%d x %d), channels = %d, maxval = %d\n", width, height, channels, maxval));
-
- im = i_img_empty_ch(NULL, width, height, channels);
+
+ if (type == 1 || type == 4) {
+ i_color pbm_pal[2];
+ pbm_pal[0].channel[0] = 255;
+ pbm_pal[1].channel[0] = 0;
+
+ im = i_img_pal_new(width, height, 1, 256);
+ i_addcolors(im, pbm_pal, 2);
+ }
+ else {
+ if (maxval > 255)
+ im = i_img_16_new(width, height, channels);
+ else
+ im = i_img_8_new(width, height, channels);
+ }
switch (type) {
case 1: /* Ascii types */
+ im = read_pbm_ascii(ig, im, width, height, allow_incomplete);
+ break;
+
case 2:
case 3:
- mult = type == 1 ? 255 : 1;
- for(y=0;y<height;y++) for(x=0; x<width; x++) {
- for(ch=0; ch<channels; ch++) {
- int t;
- if (gnum(&buf, &t)) val.channel[ch] = t;
- else {
- mm_log((1,"i_readpnm: gnum() returned false in data\n"));
- return im;
- }
- }
- i_ppix(im, x, y, &val);
- }
+ if (maxval > 255)
+ im = read_pgm_ppm_ascii_16(ig, im, width, height, channels, maxval, allow_incomplete);
+ else
+ im = read_pgm_ppm_ascii(ig, im, width, height, channels, maxval, allow_incomplete);
break;
case 4: /* binary pbm */
- for(y=0;y<height;y++) for(x=0; x<width; x+=8) {
- if ( (uc = (unsigned char*)gnext(&buf)) ) {
- int xt;
- int pc = width-x < 8 ? width-x : 8;
- /* mm_log((1,"i_readpnm: y=%d x=%d pc=%d\n", y, x, pc)); */
- for(xt = 0; xt<pc; xt++) {
- val.channel[0] = (*uc & (128>>xt)) ? 0 : 255;
- i_ppix(im, x+xt, y, &val);
- }
- } else {
- mm_log((1,"i_readpnm: gnext() returned false in data\n"));
- return im;
- }
- }
+ im = read_pbm_bin(ig, im, width, height, allow_incomplete);
break;
case 5: /* binary pgm */
case 6: /* binary ppm */
- for(y=0;y<height;y++) for(x=0; x<width; x++) {
- for(ch=0; ch<channels; ch++) {
- if ( (uc = (unsigned char*)gnext(&buf)) ) val.channel[ch] = *uc;
- else {
- mm_log((1,"i_readpnm: gnext() returned false in data\n"));
- return im;
- }
- }
- i_ppix(im, x, y, &val);
- }
+ if (maxval > 255)
+ im = read_pgm_ppm_bin16(ig, im, width, height, channels, maxval, allow_incomplete);
+ else
+ im = read_pgm_ppm_bin8(ig, im, width, height, channels, maxval, allow_incomplete);
break;
+
default:
mm_log((1, "type %s [P%d] unsupported\n", typenames[type-1], type));
return NULL;
}
+
+ if (!im)
+ return NULL;
+
+ i_tags_add(&im->tags, "i_format", 0, "pnm", -1, 0);
+ i_tags_setn(&im->tags, "pnm_maxval", maxval);
+ i_tags_setn(&im->tags, "pnm_type", type);
+
return im;
}
+static void free_images(i_img **imgs, int count) {
+ int i;
+
+ if (count) {
+ for (i = 0; i < count; ++i)
+ i_img_destroy(imgs[i]);
+ myfree(imgs);
+ }
+}
+
+i_img **i_readpnm_multi_wiol(io_glue *ig, int *count, int allow_incomplete) {
+ i_img **results = NULL;
+ i_img *img = NULL;
+ char c = EOF;
+ int result_alloc = 0,
+ value = 0,
+ eof = 0;
+ *count=0;
+
+ do {
+ mm_log((1, "read image %i\n", 1+*count));
+ img = i_readpnm_wiol( ig, allow_incomplete );
+ if( !img ) {
+ free_images( results, *count );
+ return NULL;
+ }
+ ++*count;
+ if (*count > result_alloc) {
+ if (result_alloc == 0) {
+ result_alloc = 5;
+ results = mymalloc(result_alloc * sizeof(i_img *));
+ }
+ else {
+ /* myrealloc never fails (it just dies if it can't allocate) */
+ result_alloc *= 2;
+ results = myrealloc(results, result_alloc * sizeof(i_img *));
+ }
+ }
+ results[*count-1] = img;
+
+
+ if( i_tags_get_int(&img->tags, "i_incomplete", 0, &value ) && value) {
+ eof = 1;
+ }
+ else if( skip_spaces( ig ) && ( c=i_io_peekc( ig ) ) != EOF && c == 'P' ) {
+ eof = 0;
+ }
+ else {
+ eof = 1;
+ }
+ } while(!eof);
+ return results;
+}
+
+
+
+static
+int
+write_pbm(i_img *im, io_glue *ig, int zero_is_white) {
+ int x, y;
+ i_palidx *line;
+ i_img_dim write_size;
+ unsigned char *write_buf;
+ unsigned char *writep;
+ char header[255];
+ unsigned mask;
+
+ sprintf(header, "P4\012# CREATOR: Imager\012%" i_DF " %" i_DF "\012",
+ i_DFc(im->xsize), i_DFc(im->ysize));
+ if (i_io_write(ig, header, strlen(header)) < 0) {
+ i_push_error(0, "could not write pbm header");
+ return 0;
+ }
+ write_size = (im->xsize + 7) / 8;
+ line = mymalloc(sizeof(i_palidx) * im->xsize);
+ write_buf = mymalloc(write_size);
+ for (y = 0; y < im->ysize; ++y) {
+ i_gpal(im, 0, im->xsize, y, line);
+ mask = 0x80;
+ writep = write_buf;
+ memset(write_buf, 0, write_size);
+ for (x = 0; x < im->xsize; ++x) {
+ if (zero_is_white ? line[x] : !line[x])
+ *writep |= mask;
+ mask >>= 1;
+ if (!mask) {
+ ++writep;
+ mask = 0x80;
+ }
+ }
+ if (i_io_write(ig, write_buf, write_size) != write_size) {
+ i_push_error(0, "write failure");
+ myfree(write_buf);
+ myfree(line);
+ return 0;
+ }
+ }
+ myfree(write_buf);
+ myfree(line);
+
+ return 1;
+}
+
+static
+int
+write_ppm_data_8(i_img *im, io_glue *ig, int want_channels) {
+ size_t write_size = im->xsize * want_channels;
+ size_t buf_size = im->xsize * im->channels;
+ unsigned char *data = mymalloc(buf_size);
+ i_img_dim y = 0;
+ int rc = 1;
+ i_color bg;
+
+ i_get_file_background(im, &bg);
+ while (y < im->ysize && rc >= 0) {
+ i_gsamp_bg(im, 0, im->xsize, y, data, want_channels, &bg);
+ if (i_io_write(ig, data, write_size) != write_size) {
+ i_push_error(errno, "could not write ppm data");
+ rc = 0;
+ break;
+ }
+ ++y;
+ }
+ myfree(data);
+
+ return rc;
+}
+
+static
+int
+write_ppm_data_16(i_img *im, io_glue *ig, int want_channels) {
+ size_t line_size = im->channels * im->xsize * sizeof(i_fsample_t);
+ size_t sample_count = want_channels * im->xsize;
+ size_t write_size = sample_count * 2;
+ i_fsample_t *line_buf = mymalloc(line_size);
+ i_fsample_t *samplep;
+ unsigned char *write_buf = mymalloc(write_size);
+ unsigned char *writep;
+ size_t sample_num;
+ i_img_dim y = 0;
+ int rc = 1;
+ i_fcolor bg;
+
+ i_get_file_backgroundf(im, &bg);
+
+ while (y < im->ysize) {
+ i_gsampf_bg(im, 0, im->xsize, y, line_buf, want_channels, &bg);
+ samplep = line_buf;
+ writep = write_buf;
+ for (sample_num = 0; sample_num < sample_count; ++sample_num) {
+ unsigned sample16 = SampleFTo16(*samplep++);
+ *writep++ = sample16 >> 8;
+ *writep++ = sample16 & 0xFF;
+ }
+ if (i_io_write(ig, write_buf, write_size) != write_size) {
+ i_push_error(errno, "could not write ppm data");
+ rc = 0;
+ break;
+ }
+ ++y;
+ }
+ myfree(line_buf);
+ myfree(write_buf);
+
+ return rc;
+}
undef_int
i_writeppm_wiol(i_img *im, io_glue *ig) {
char header[255];
- int rc;
- writep write_func;
+ int zero_is_white;
+ int wide_data;
mm_log((1,"i_writeppm(im %p, ig %p)\n", im, ig));
i_clear_error();
/* Add code to get the filename info from the iolayer */
/* Also add code to check for mmapped code */
- io_glue_commit_types(ig);
+ if (i_img_is_monochrome(im, &zero_is_white)) {
+ if (!write_pbm(im, ig, zero_is_white))
+ return 0;
+ }
+ else {
+ int type;
+ int maxval;
+ int want_channels = im->channels;
- if (im->channels == 3) {
- sprintf(header,"P6\n#CREATOR: Imager\n%d %d\n255\n",im->xsize,im->ysize);
- if (ig->writecb(ig,header,strlen(header))<0) {
- i_push_error(errno, "could not write ppm header");
- mm_log((1,"i_writeppm: unable to write ppm header.\n"));
- return(0);
- }
+ if (want_channels == 2 || want_channels == 4)
+ --want_channels;
- if (!im->virtual && im->bits == i_8_bits && im->type == i_direct_type) {
- rc = ig->writecb(ig,im->idata,im->bytes);
+ if (!i_tags_get_int(&im->tags, "pnm_write_wide_data", 0, &wide_data))
+ wide_data = 0;
+
+ if (want_channels == 3) {
+ type = 6;
}
- else {
- unsigned char *data = mymalloc(3 * im->xsize);
- if (data != NULL) {
- int y = 0;
- int x, ch;
- unsigned char *p;
- static int rgb_chan[3] = { 0, 1, 2 };
-
- rc = 0;
- while (y < im->ysize && rc >= 0) {
- i_gsamp(im, 0, im->xsize, y, data, rgb_chan, 3);
- rc = ig->writecb(ig, data, im->xsize * 3);
- }
- myfree(data);
- }
- else {
- i_push_error(0, "Out of memory");
- return 0;
- }
+ else if (want_channels == 1) {
+ type = 5;
}
- if (rc<0) {
- i_push_error(errno, "could not write ppm data");
- mm_log((1,"i_writeppm: unable to write ppm data.\n"));
+ else {
+ i_push_error(0, "can only save 1 or 3 channel images to pnm");
+ mm_log((1,"i_writeppm: ppm/pgm is 1 or 3 channel only (current image is %d)\n",im->channels));
return(0);
}
- }
- else if (im->channels == 1) {
- sprintf(header, "P5\n#CREATOR: Imager\n%d %d\n255\n",
- im->xsize, im->ysize);
- if (ig->writecb(ig,header, strlen(header)) < 0) {
- i_push_error(errno, "could not write pgm header");
- mm_log((1,"i_writeppm: unable to write pgm header.\n"));
+ if (im->bits <= 8 || !wide_data)
+ maxval = 255;
+ else
+ maxval = 65535;
+
+ sprintf(header,"P%d\n#CREATOR: Imager\n%" i_DF " %" i_DF"\n%d\n",
+ type, i_DFc(im->xsize), i_DFc(im->ysize), maxval);
+
+ if (i_io_write(ig,header,strlen(header)) != strlen(header)) {
+ i_push_error(errno, "could not write ppm header");
+ mm_log((1,"i_writeppm: unable to write ppm header.\n"));
return(0);
}
- if (!im->virtual && im->bits == i_8_bits && im->type == i_direct_type) {
- rc=ig->writecb(ig,im->idata,im->bytes);
- }
- else {
- unsigned char *data = mymalloc(im->xsize);
- if (data != NULL) {
- int y = 0;
- int x, ch;
- int chan = 0;
- unsigned char *p;
-
- rc = 0;
- while (y < im->ysize && rc >= 0) {
- i_gsamp(im, 0, im->xsize, y, data, &chan, 1);
- rc = ig->writecb(ig, data, im->xsize);
- }
- myfree(data);
- }
- else {
- i_push_error(0, "Out of memory");
+ if (!im->virtual && im->bits == i_8_bits && im->type == i_direct_type
+ && im->channels == want_channels) {
+ if (i_io_write(ig,im->idata,im->bytes) != im->bytes) {
+ i_push_error(errno, "could not write ppm data");
return 0;
}
}
- if (rc<0) {
- i_push_error(errno, "could not write pgm data");
- mm_log((1,"i_writeppm: unable to write pgm data.\n"));
- return(0);
+ else if (maxval == 255) {
+ if (!write_ppm_data_8(im, ig, want_channels))
+ return 0;
+ }
+ else {
+ if (!write_ppm_data_16(im, ig, want_channels))
+ return 0;
}
}
- else {
- i_push_error(0, "can only save 1 or 3 channel images to pnm");
- mm_log((1,"i_writeppm: ppm/pgm is 1 or 3 channel only (current image is %d)\n",im->channels));
- return(0);
+ if (i_io_close(ig)) {
+ i_push_errorf(i_io_error(ig), "Error closing stream: %d", i_io_error(ig));
+ return 0;
}
return(1);
}
+
+/*
+=back
+
+=head1 AUTHOR
+
+Arnar M. Hrafnkelsson <addi@umich.edu>, Tony Cook <tonyc@cpan.org>,
+Philip Gwyn <gwyn@cpan.org>.
+
+=head1 SEE ALSO
+
+Imager(3)
+
+=cut
+*/
projects / imager.git / blobdiff