HIDDEN int
png_write(icv_image_t *bif, const char *filename)
{
png_structp png_ptr = NULL;
png_infop info_ptr = NULL;
int i = 0;
int png_color_type = PNG_COLOR_TYPE_RGB;
unsigned char *data;
FILE *fh;
fh = fopen(filename, "wb");
if (UNLIKELY(fh==NULL)) {
perror("fdopen");
bu_log("ERROR: png_write failed to get a FILE pointer\n");
return 0;
}
data = data2uchar(bif);
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (UNLIKELY(png_ptr == NULL)) {
fclose(fh);
return 0;
}
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL || setjmp(png_jmpbuf(png_ptr))) {
png_destroy_read_struct(&png_ptr, info_ptr ? &info_ptr : NULL, NULL);
bu_log("ERROR: Unable to create png header\n");
fclose(fh);
return 0;
}
png_init_io(png_ptr, fh);
png_set_IHDR(png_ptr, info_ptr, (unsigned)bif->width, (unsigned)bif->height, 8, png_color_type,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
png_write_info(png_ptr, info_ptr);
for (i = bif->height-1; i >= 0; --i)
png_write_row(png_ptr, (png_bytep) (data + bif->width*bif->channels*i));
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(fh);
return 1;
}
int
bw_write(icv_image_t *bif, const char *filename)
{
unsigned char *data;
FILE *fp;
size_t ret, size;
if (bif->color_space == ICV_COLOR_SPACE_RGB) {
icv_rgb2gray_ntsc(bif);
} else if (bif->color_space != ICV_COLOR_SPACE_GRAY) {
bu_log("bw_write : Color Space conflict");
return -1;
}
data = data2uchar(bif);
size = bif->height*bif->width;
if (filename == NULL) {
fp = stdout;
} else {
fp = fopen(filename, "wb");
if (fp == NULL) {
bu_log("bw_write: Cannot open file for saving\n");
return -1;
}
}
ret = fwrite(data, 1, size, fp);
fclose(fp);
bu_free(data, "bw_write : Unsigned Char data");
if (ret != size) {
bu_log("bw_write : Short Write\n");
return -1;
}
return 0;
}