GImage *GImageRead_Jpeg(FILE *infile) {
GImage *ret;
struct _GImage *base;
struct jpeg_decompress_struct cinfo;
struct my_error_mgr jerr;
JSAMPLE *rows[1];
struct jpegState js;
int ypos;
if ( libjpeg==NULL )
if ( !loadjpeg())
return( NULL );
cinfo.err = _jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = my_error_exit;
if (setjmp(jerr.setjmp_buffer)) {
_jpeg_destroy_decompress(&cinfo);
return( NULL );
}
_jpeg_create_decompress(&cinfo,JPEG_LIB_VERSION,(size_t) sizeof(struct jpeg_decompress_struct));
_jpeg_stdio_src(&cinfo, infile);
(void) _jpeg_read_header(&cinfo, TRUE);
if ( cinfo.jpeg_color_space == JCS_GRAYSCALE )
cinfo.out_color_space = JCS_RGB;
ret = GImageCreate(it_true,cinfo.image_width, cinfo.image_height);
if ( ret==NULL ) {
_jpeg_destroy_decompress(&cinfo);
return( NULL );
}
base = ret->u.image;
(void) _jpeg_start_decompress(&cinfo);
rows[0] = galloc(3*cinfo.image_width);
js.cinfo = &cinfo; js.base = base; js.buffer = rows[0];
while (cinfo.output_scanline < cinfo.output_height) {
ypos = cinfo.output_scanline;
(void) _jpeg_read_scanlines(&cinfo, rows, 1);
transferBufferToImage(&js,ypos);
}
(void) _jpeg_finish_decompress(&cinfo);
_jpeg_destroy_decompress(&cinfo);
gfree(rows[0]);
return( ret );
}
GImage *GImageReadJpeg(char *filename) {
GImage *ret;
FILE * infile; /* source file */
if ( libjpeg==NULL )
if ( !loadjpeg())
return( NULL );
if ((infile = fopen(filename, "rb")) == NULL) {
fprintf(stderr,"can't open %s\n", filename);
return( NULL );
}
ret = GImageRead_Jpeg(infile);
fclose(infile);
return( ret );
}
static int loadimage(const char *path, img_t *image)
{
lprintf("loadimage %s\n", path);
const char *p = strrchr(path, '.');
if(!p)
{
lprintf("%s has no extension\n");
return -1;
}
const char *fn = strrchr(path, '/');
if(fn)
fn++;
else fn = path;
strcpy(image->filename, fn);
if(!strcasecmp(p, ".jpeg") || !strcasecmp(p, ".jpg"))
return loadjpeg(path, image);
if(!strcasecmp(p, ".png"))
return loadpng(path, image);
lprintf("Unrecognized extension\n");
return -1;
}
