return 1;
}
+int jpeg_save_gray(unsigned char*data, int width, int height, int quality, const char*filename)
+{
+ struct jpeg_destination_mgr mgr;
+ struct jpeg_compress_struct cinfo;
+ struct jpeg_error_mgr jerr;
+
+ if(filename) fi = fopen(filename, "wb");
+ else fi = 0;
+
+ memset(&cinfo, 0, sizeof(cinfo));
+ memset(&jerr, 0, sizeof(jerr));
+ memset(&mgr, 0, sizeof(mgr));
+ cinfo.err = jpeg_std_error(&jerr);
+ jpeg_create_compress(&cinfo);
+
+ mgr.init_destination = file_init_destination;
+ mgr.empty_output_buffer = file_empty_output_buffer;
+ mgr.term_destination = file_term_destination;
+ cinfo.dest = &mgr;
+ cinfo.image_width = width;
+ cinfo.image_height = height;
+ cinfo.input_components = 1;
+ cinfo.in_color_space = JCS_GRAYSCALE;
+ jpeg_set_defaults(&cinfo);
+ jpeg_set_quality(&cinfo,quality,TRUE);
+ jpeg_start_compress(&cinfo, FALSE);
+ int t;
+ for(t=0;t<height;t++) {
+ unsigned char*data2 = &data[width*t];
+ jpeg_write_scanlines(&cinfo, &data2, 1);
+ }
+ jpeg_finish_compress(&cinfo);
+
+ if(fi) fclose(fi);
+ jpeg_destroy_compress(&cinfo);
+ return 1;
+}
+
+
int jpeg_save_to_file(unsigned char*data, int width, int height, int quality, FILE*_fi)
{
struct jpeg_destination_mgr mgr;
//printf("term %d\n", size - mgr->bytes_in_buffer);
}
-int jpeg_load_from_mem(unsigned char*_data, int _size, unsigned char*dest, int width, int height)
+int jpeg_load_from_mem(unsigned char*_data, int _size, unsigned char**dest, int*width, int*height)
{
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
struct jpeg_source_mgr mgr;
- int y,x;
data = _data;
size = _size;
cinfo.src = &mgr;
jpeg_read_header(&cinfo, TRUE);
+ cinfo.out_color_space == JCS_RGB;
jpeg_start_decompress(&cinfo);
+
+ *width = cinfo.output_width;
+ *height = cinfo.output_height;
+ *dest = malloc(cinfo.output_width * cinfo.output_height * 4);
- for(y=0;y<height;y++) {
- unsigned char*j = &dest[width*y*3];
- jpeg_read_scanlines(&cinfo,&j,1);
+ unsigned char*scanline = malloc(cinfo.output_width * 4);
+ int y;
+ for(y=0;y<cinfo.output_height;y++) {
+ unsigned char*to = &(*dest)[cinfo.output_width*y*4];
+ jpeg_read_scanlines(&cinfo,&scanline,1);
+ int x;
+ for(x=0;x<cinfo.output_width;x++) {
+ to[x*4 + 0] = 255;
+ to[x*4 + 1] = scanline[x*3 + 0];
+ to[x*4 + 2] = scanline[x*3 + 1];
+ to[x*4 + 3] = scanline[x*3 + 2];
+ }
}
+ free(scanline);
jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
return 1;
}
+void jpeg_get_size(const char *filename, int *width, int *height)
+{
+ struct jpeg_decompress_struct cinfo;
+ struct jpeg_error_mgr jerr;
+ FILE *fi;
+ *width = 0;
+ *height = 0;
+ cinfo.err = jpeg_std_error(&jerr);
+ cinfo.image_width = 0;
+ cinfo.image_height = 0;
+ jpeg_create_decompress(&cinfo);
+ if ((fi = fopen(filename, "rb")) == NULL) {
+ fprintf(stderr, "couldn't open %s\n", filename);
+ return;
+ }
+ jpeg_stdio_src(&cinfo, fi);
+ jpeg_read_header(&cinfo, TRUE);
+ *width = cinfo.image_width;
+ *height = cinfo.image_height;
+ jpeg_destroy_decompress(&cinfo);
+ fclose(fi);
+}
+
#else
int jpeg_save(unsigned char*data, int width, int height, int quality, const char*filename)
fprintf(stderr, "jpeg_load: No JPEG support compiled in\n");
return 0;
}
+void jpeg_get_size(const char *fname, int *width, int *height)
+{
+ *width = 0;
+ *height = 0;
+ fprintf(stderr, "jpeg_get_size: No JPEG support compiled in\n");
+}
#endif