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images can now also be read from stdin (thanks to Siim Salonen)

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This commit is contained in:
Dominic Radermacher 2020-11-30 10:13:14 +01:00
parent 87a8e8ff81
commit 96c1d5c6b9
1 changed files with 15 additions and 6 deletions
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21
src/ptouch-print.c
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@ -126,15 +126,24 @@ gdImage *image_load(const char *file)
FILE *f;
gdImage *img=NULL;
if ((f = fopen(file, "rb")) == NULL) { /* error cant open file */
if (!strcmp(file, "-")) {
f = stdin;
} else {
f = fopen(file, "rb");
}
if (f == NULL) { /* error could not open file */
return NULL;
}
if (fread(d, sizeof(d), 1, f) != 1) {
return NULL;
}
rewind(f);
if (memcmp(d, png, 8) == 0) {
if (fseek(f, 0L, SEEK_SET)) { /* file is not seekable. eg 'stdin' */
img=gdImageCreateFromPng(f);
} else {
if (fread(d, sizeof(d), 1, f) != 1) {
return NULL;
}
rewind(f);
if (memcmp(d, png, 8) == 0) {
img=gdImageCreateFromPng(f);
}
}
fclose(f);
return img;