56     struct jpeg_compress_struct cinfo = {  in write_JPEG_Buff()  local
61     jpeg_create_compress(&cinfo);  in write_JPEG_Buff()
69     cinfo.dest = &dm;  in write_JPEG_Buff()
73     cinfo.image_width = (JDIMENSION) image_width;  in write_JPEG_Buff()
74     cinfo.image_height = (JDIMENSION) image_height;  in write_JPEG_Buff()
76         cinfo.in_color_space = JCS_RGB;  in write_JPEG_Buff()
77         cinfo.jpeg_color_space = JCS_RGB;  in write_JPEG_Buff()
78         cinfo.input_components = 3;  in write_JPEG_Buff()
80         cinfo.in_color_space = JCS_GRAYSCALE;  in write_JPEG_Buff()
81         cinfo.jpeg_color_space = JCS_GRAYSCALE;  in write_JPEG_Buff()
82         cinfo.input_components = 1;  in write_JPEG_Buff()
85     jpeg_set_defaults(&cinfo);  in write_JPEG_Buff()
90     jpeg_set_quality(&cinfo, quality, TRUE); // TRUE = limit to baseline-JPEG values  in write_JPEG_Buff()
93     cinfo.density_unit = 1;      // 1=dots-per-inch, 2=dots per cm  in write_JPEG_Buff()
94     cinfo.X_density = (UINT16) resolution;  in write_JPEG_Buff()
95     cinfo.Y_density = (UINT16) resolution;  in write_JPEG_Buff()
99     cinfo.MCUs_per_row = (JDIMENSION) image_width;  in write_JPEG_Buff()
100     cinfo.MCU_rows_in_scan = (JDIMENSION) image_height;  in write_JPEG_Buff()
103     jpeg_start_compress(&cinfo, TRUE);  in write_JPEG_Buff()
108     row_stride = image_width * cinfo.input_components; // JSAMPLEs per row in imageBuffer  in write_JPEG_Buff()
111     while (cinfo.next_scanline < cinfo.image_height) {  in write_JPEG_Buff()
112         row_pointer[0] = &imageBuffer[cinfo.next_scanline * row_stride];  in write_JPEG_Buff()
113         (void) jpeg_write_scanlines(&cinfo, row_pointer, 1);  in write_JPEG_Buff()
118     jpeg_finish_compress(&cinfo);  in write_JPEG_Buff()
122     jpeg_destroy_compress(&cinfo);  in write_JPEG_Buff()
124     *numCompBytes = (int) (cinfo.dest->next_output_byte - buffPtr);  in write_JPEG_Buff()