char *JpegCompressData(XImage *image, int level, int *compressed_size)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
CARD8 *srcBuf;
JSAMPROW rowPointer[1];
int dy, w, h;
*compressed_size = 0;
/*
* Initialize the image stuff
*/
bitsPerPixel = image -> bits_per_pixel;
bytesPerLine = image -> bytes_per_line;
byteOrder = image -> byte_order;
#ifdef TEST
fprintf(stderr, "******JpegCompressData: Image byte order [%d] bitmap bit order [%d].\n",
image -> byte_order, image -> bitmap_bit_order);
fprintf(stderr, "******JpegCompressData: Bits per pixel [%d] bytes per line [%d].\n",
bitsPerPixel, bytesPerLine);
#endif
redShift = FindLSB(image -> red_mask) - 1;
greenShift = FindLSB(image -> green_mask) - 1;
blueShift = FindLSB(image -> blue_mask) - 1;
#ifdef TEST
fprintf(stderr, "******JpegCompressData: Red mask [0x%lx] green mask [0x%lx] blue mask [0x%lx].\n",
image -> red_mask, image -> green_mask, image -> blue_mask);
fprintf(stderr, "******JpegCompressData: Red shift [%d] green shift [%d] blue shift [%d].\n",
redShift, greenShift, blueShift);
#endif
redMax = image -> red_mask >> redShift;
greenMax = image -> green_mask >> greenShift;
blueMax = image -> blue_mask >> blueShift;
#ifdef TEST
fprintf(stderr, "******JpegCompressData: Red max [0x%x] green max [0x%x] blue max [0x%x].\n",
redMax, greenMax, blueMax);
#endif
w = image -> width;
h = image -> height;
jpegBeforeBuf = image -> data;
#ifdef DEBUG
fprintf(stderr, "******JpegCompressData: Width [%d] height [%d] level [%d].\n",
w, h, level);
#endif
if (bitsPerPixel == 1 ||
bitsPerPixel == 8)
{
#ifdef PANIC
fprintf(stderr, "******JpegCompressData: PANIC! Invalid bits per pixel [%d].\n",
bitsPerPixel);
#endif
return NULL;
}
/*
* Allocate space for one line of the
* resulting image, 3 bytes per pixel.
*/
#ifdef DEBUG
fprintf(stderr, "******JpegCompressData: Allocating [%d] bytes for the scanline.\n",
w * 3);
#endif
srcBuf = (CARD8 *) malloc(w * 3);
if (srcBuf == NULL)
{
#ifdef PANIC
fprintf(stderr, "******JpegCompressData: PANIC! Cannot allocate [%d] bytes.\n",
w * 3);
#endif
return NULL;
}
rowPointer[0] = srcBuf;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
cinfo.image_width = w;
cinfo.image_height = h;
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, jpegQuality[level], 1);
/*
* Allocate memory for the destination
* buffer.
*/
jpegCompBufSize = JPEG_DEST_SIZE(w, h);
#ifdef TEST
fprintf(stderr, "******JpegCompressData: Allocating [%d] bytes for the destination data.\n",
jpegCompBufSize);
#endif
jpegCompBuf = malloc(jpegCompBufSize);
if (jpegCompBuf == NULL)
{
#ifdef PANIC
fprintf(stderr, "******JpegCompressData: PANIC! Error allocating [%d] bytes for the Jpeg data.\n",
jpegCompBufSize);
#endif
return NULL;
}
JpegSetDstManager(&cinfo);
jpeg_start_compress(&cinfo, 1);
#ifdef DEBUG
fprintf(stderr, "******JpegCompressedData: Initialization finished.\n");
#endif
for (dy = 0; dy < h; dy++)
{
PrepareRowForJpeg(srcBuf, dy, w);
jpeg_write_scanlines(&cinfo, rowPointer, 1);
if (jpegError != 0)
{
break;
}
}
#ifdef DEBUG
fprintf(stderr, "******JpegCompressedData: Compression finished. Lines handled [%d,%d]. Error is [%d].\n",
dy, h, jpegError);
#endif
if (jpegError == 0)
{
jpeg_finish_compress(&cinfo);
}
jpeg_destroy_compress(&cinfo);
free((char *) srcBuf);
if (jpegError != 0)
{
#ifdef PANIC
fprintf(stderr, "******JpegCompressedData: PANIC! Compression failed. Error is [%d].\n",
jpegError);
#endif
free(jpegCompBuf);
return NULL;
}
/*
* Check the size of the resulting data.
*/
if (jpegDstDataLen > 0)
{
/*
* Save the image on disk to help with
* the debug.
*/
#ifdef DEBUG
int i = 0;
fprintf(stderr, "******JpegCompressedData: Compressed size [%d].\n",
jpegDstDataLen);
jpegId++;
sprintf(jpegName, "jpeg%d", jpegId);
jpegFile = fopen(jpegName, "w");
for (i = 0; i < jpegDstDataLen; i++)
{
fprintf(jpegFile, "%c", *(jpegCompBuf + i));
}
fclose(jpegFile);
#endif
*compressed_size = jpegDstDataLen;
return jpegCompBuf;
}
else
{
#ifdef PANIC
fprintf(stderr, "******JpegCompressedData: PANIC! Invalid size of the compressed data [%d].\n",
jpegDstDataLen);
#endif
free(jpegCompBuf);
return NULL;
}
}
int
vncEncodeUltra2::SendJpegRect(BYTE *src,BYTE *dst, int dst_size, int w, int h, int quality,rfbPixelFormat m_remoteformat)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
BYTE *srcBuf=NULL;
cinfo.image_width = w;
cinfo.image_height = h;
cinfo.in_color_space = JCS_RGB;
cinfo.input_components = 3;
#ifdef JCS_EXTENSIONS
// Try to have libjpeg read directly from our native format
if(m_remoteformat.bitsPerPixel==32) {
int redShift, greenShift, blueShift;
if(m_remoteformat.bigEndian) {
redShift = 24 - m_remoteformat.redShift;
greenShift = 24 - m_remoteformat.greenShift;
blueShift = 24 - m_remoteformat.blueShift;
} else {
redShift = m_remoteformat.redShift;
greenShift = m_remoteformat.greenShift;
blueShift = m_remoteformat.blueShift;
}
if(redShift == 0 && greenShift == 8 && blueShift == 16)
cinfo.in_color_space = JCS_EXT_RGBX;
if(redShift == 16 && greenShift == 8 && blueShift == 0)
cinfo.in_color_space = JCS_EXT_BGRX;
if(redShift == 24 && greenShift == 16 && blueShift == 8)
cinfo.in_color_space = JCS_EXT_XBGR;
if(redShift == 8 && greenShift == 16 && blueShift == 24)
cinfo.in_color_space = JCS_EXT_XRGB;
if (cinfo.in_color_space != JCS_RGB) {
srcBuf = src;
cinfo.input_components = 4;
}
}
#endif
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, quality, TRUE);
if(quality >= 96) cinfo.dct_method = JDCT_ISLOW;
else cinfo.dct_method = JDCT_FASTEST;
cinfo.comp_info[0].h_samp_factor = 2;
cinfo.comp_info[0].v_samp_factor = 2;
JpegSetDstManager(&cinfo, dst, dst_size);
JSAMPROW *rowPointer = new JSAMPROW[h];
for (int dy = 0; dy < h; dy++)
rowPointer[dy] = (JSAMPROW)(&srcBuf[dy * w * 4]);
jpeg_start_compress(&cinfo, TRUE);
while (cinfo.next_scanline < cinfo.image_height)
{
jpeg_write_scanlines(&cinfo, &rowPointer[cinfo.next_scanline],
cinfo.image_height - cinfo.next_scanline);
if (jpegError)
break;
}
if (!jpegError)
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
delete[] rowPointer;
if (jpegError) return 0;
return jpegDstDataLen;
}
