/*
* See: http://msdn.microsoft.com/en-us/library/dd145119%28VS.85%29.aspx
* This function was copied from the MSDN example.
* It was then modified to send the BMP data rather than save to disk
* It was then modified to conver the BMP to JPEG and send
* Now its realy big.
*/
int bmp2jpeg(PBYTE buf, int quality, BYTE ** buf_jpeg, DWORD * buf_jpeg_size )
{
// Convert to JPEG stuff
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
cjpeg_source_ptr src_mgr;
JDIMENSION num_scanlines;
// JPEG conversion start here..'
// buf is a pointer to a BMP in memory.
/* Initialize JPEG parameters.
* Much of this may be overridden later.
* We need to provide some value for jpeg_set_defaults() to work.
*/
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
jpeg_set_defaults(&cinfo);
src_mgr = jinit_read_bmp(&cinfo); //Returns a cjpeg_source_ptr but is really bmp_source_ptr...
src_mgr->input_buf = buf;
src_mgr->read_offset = 0;
/* Read the input file header to obtain file size & colorspace. */
start_input_bmp(&cinfo, src_mgr);
jpeg_default_colorspace(&cinfo);
// TODO: accept options from the command line for grayscale and quality.
/* Go GRAYSCALE */
//jpeg_set_colorspace(&cinfo, JCS_GRAYSCALE);
/* Quality */
jpeg_set_quality(&cinfo, quality, FALSE);
// Write the compressed JPEG to memory: bug_jpeg
jpeg_mem_dest(&cinfo, buf_jpeg, buf_jpeg_size);
/* Start compressor */
jpeg_start_compress(&cinfo, TRUE);
/* Process data */
while (cinfo.next_scanline < cinfo.image_height) {
num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
(void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
}
/* Finish compression and release memory */
(*src_mgr->finish_input) (&cinfo, src_mgr);
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
return 1;
}
/*
* See: http://msdn.microsoft.com/en-us/library/dd145119%28VS.85%29.aspx
* This function was copied from the MSDN example.
* It was then modified to send the BMP data rather than save to disk
* It was then modified to conver the BMP to JPEG and send
* Now its realy big.
*/
int bmp2jpeg(HBITMAP hBmp, HDC hDC, int quality, BYTE ** buf_jpeg, DWORD * buf_jpeg_size )
{
// data structures
BITMAP bmp;
PBITMAPINFO pbmi;
WORD cClrBits;
BITMAPFILEHEADER hdr; // bitmap file-header
PBITMAPINFOHEADER pbih; // bitmap info-header
LPBYTE lpBits; // memory pointer
DWORD dwTotal; // total count of bytes
DWORD cb; // incremental count of bytes
BYTE *hp; // byte pointer
DWORD s;
TCHAR* buf;
// Convert to JPEG stuff
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
cjpeg_source_ptr src_mgr;
JDIMENSION num_scanlines;
// Retrieve the bitmap's color format, width, and height.
if (!GetObject(hBmp, sizeof(BITMAP), (LPVOID) &bmp))
// GetObject failed
return 0;
// Convert the color format to a count of bits.
cClrBits = (WORD)(bmp.bmPlanes * bmp.bmBitsPixel);
if (cClrBits == 1)
cClrBits = 1;
else if (cClrBits <= 4)
cClrBits = 4;
else if (cClrBits <= 8)
cClrBits = 8;
else if (cClrBits <= 16)
cClrBits = 16;
else if (cClrBits <= 24)
cClrBits = 24;
else cClrBits = 32;
// Allocate memory for the BITMAPINFO structure. (This structure
// contains a BITMAPINFOHEADER structure and an array of RGBQUAD
// data structures.)
if (cClrBits != 24)
pbmi = (PBITMAPINFO) LocalAlloc(LPTR, sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * (1<< cClrBits));
// There is no RGBQUAD array for the 24-bit-per-pixel format.
else
pbmi = (PBITMAPINFO) LocalAlloc(LPTR, sizeof(BITMAPINFOHEADER));
// Initialize the fields in the BITMAPINFO structure.
pbmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
pbmi->bmiHeader.biWidth = bmp.bmWidth;
pbmi->bmiHeader.biHeight = bmp.bmHeight;
pbmi->bmiHeader.biPlanes = bmp.bmPlanes;
pbmi->bmiHeader.biBitCount = bmp.bmBitsPixel;
if (cClrBits < 24)
pbmi->bmiHeader.biClrUsed = (1<<cClrBits);
// If the bitmap is not compressed, set the BI_RGB flag.
pbmi->bmiHeader.biCompression = BI_RGB;
// Compute the number of bytes in the array of color
// indices and store the result in biSizeImage.
pbmi->bmiHeader.biSizeImage = (pbmi->bmiHeader.biWidth + 7) /8
* pbmi->bmiHeader.biHeight * cClrBits;
// Set biClrImportant to 0, indicating that all of the
// device colors are important.
pbmi->bmiHeader.biClrImportant = 0;
pbih = (PBITMAPINFOHEADER) pbmi;
lpBits = (LPBYTE) GlobalAlloc(GMEM_FIXED, pbih->biSizeImage);
if (!lpBits) {
// GlobalAlloc failed
//printf("error: out of memory\n");
return 0;
}
// Retrieve the color table (RGBQUAD array) and the bits
// (array of palette indices) from the DIB.
if (!GetDIBits(hDC, hBmp, 0, (WORD) pbih->biHeight, lpBits, pbmi, DIB_RGB_COLORS)) {
// GetDIBits failed
//printf("error: GetDiBits failed\n");
return 0;
}
hdr.bfType = 0x4d42; // 0x42 = "B" 0x4d = "M"
// Compute the size of the entire file.
hdr.bfSize = (DWORD) (sizeof(BITMAPFILEHEADER) +
pbih->biSize + pbih->biClrUsed
* sizeof(RGBQUAD) + pbih->biSizeImage);
hdr.bfReserved1 = 0;
hdr.bfReserved2 = 0;
// Compute the offset to the array of color indices.
hdr.bfOffBits = (DWORD) sizeof(BITMAPFILEHEADER) +
pbih->biSize + pbih->biClrUsed * sizeof (RGBQUAD);
s = sizeof(BITMAPFILEHEADER);
s = s + (sizeof(BITMAPINFOHEADER)+ pbih->biClrUsed * sizeof (RGBQUAD));
// Copy the array of color indices into the .BMP file.
dwTotal = cb = pbih->biSizeImage;
hp = lpBits;
s = s + ((int) cb);
buf = (TCHAR *)malloc(s * sizeof(TCHAR));
memcpy(buf, (LPVOID) &hdr, sizeof(BITMAPFILEHEADER));
memcpy(buf+sizeof(BITMAPFILEHEADER),(LPVOID) pbih, sizeof(BITMAPINFOHEADER)+ pbih->biClrUsed * sizeof (RGBQUAD));
memcpy(buf+sizeof(BITMAPFILEHEADER)+ (sizeof(BITMAPINFOHEADER)+ pbih->biClrUsed * sizeof (RGBQUAD)),(LPSTR) hp, (int) cb);
// Don't send it yet. Convert it to a JPEG.
//packet_add_tlv_raw(resp, TLV_TYPE_DEV_SCREEN, buf, s);
// JPEG conversion start here..'
// buf is a pointer to a BMP in memory.
/* Initialize JPEG parameters.
* Much of this may be overridden later.
* We need to provide some value for jpeg_set_defaults() to work.
*/
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
jpeg_set_defaults(&cinfo);
src_mgr = jinit_read_bmp(&cinfo); //Returns a cjpeg_source_ptr but is really bmp_source_ptr...
src_mgr->input_buf = buf;
src_mgr->read_offset = 0;
/* Read the input file header to obtain file size & colorspace. */
start_input_bmp(&cinfo, src_mgr);
jpeg_default_colorspace(&cinfo);
// TODO: accept options from the command line for grayscale and quality.
/* Go GRAYSCALE */
//jpeg_set_colorspace(&cinfo, JCS_GRAYSCALE);
/* Quality */
jpeg_set_quality(&cinfo, quality, FALSE);
// Write the compressed JPEG to memory: bug_jpeg
jpeg_mem_dest(&cinfo, buf_jpeg, buf_jpeg_size);
/* Start compressor */
jpeg_start_compress(&cinfo, TRUE);
/* Process data */
while (cinfo.next_scanline < cinfo.image_height) {
num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
(void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
}
/* Finish compression and release memory */
(*src_mgr->finish_input) (&cinfo, src_mgr);
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
// Free memory.
GlobalFree((HGLOBAL)lpBits);
// This wasn't being free'ed before. Shouldn't you free all malloc calls?
free(buf);
return 1;
}
/*
* See: http://msdn.microsoft.com/en-us/library/dd145119%28VS.85%29.aspx
* This function was copied from the MSDN example.
* It was then modified to send the BMP data rather than save to disk
* It was then modified to conver the BMP to JPEG and send
* Now its realy big.
*/
int bmp2jpegtofile(PBYTE buf, int quality, const wchar_t* name) {
// Convert to JPEG stuff
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
cjpeg_source_ptr src_mgr;
JDIMENSION num_scanlines;
errno_t err;
FILE *stream;
// JPEG conversion start here..'
// buf is a pointer to a BMP in memory.
/* Initialize JPEG parameters.
* Much of this may be overridden later.
* We need to provide some value for jpeg_set_defaults() to work.
*/
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
jpeg_set_defaults(&cinfo);
src_mgr = jinit_read_bmp(&cinfo); //Returns a cjpeg_source_ptr but is really bmp_source_ptr...
src_mgr->input_buf = buf;
src_mgr->read_offset = 0;
/* Read the input file header to obtain file size & colorspace. */
start_input_bmp(&cinfo, src_mgr);
jpeg_default_colorspace(&cinfo);
// TODO: accept options from the command line for grayscale and quality.
/* Go GRAYSCALE */
//jpeg_set_colorspace(&cinfo, JCS_GRAYSCALE);
/* Quality */
jpeg_set_quality(&cinfo, quality, FALSE);
// Open for read (will fail if file "crt_fopen_s.c" does not exist)
if( (err = _wfopen_s( &stream, name, L"wb")) != 0 ){
printf( "The file was not opened\n" );
return 0;
}
jpeg_stdio_dest(&cinfo, stream);
/* Start compressor */
jpeg_start_compress(&cinfo, TRUE);
/* Process data */
while (cinfo.next_scanline < cinfo.image_height) {
num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
(void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
}
/* Finish compression and release memory */
(*src_mgr->finish_input) (&cinfo, src_mgr);
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
fclose(stream);
return 1;
}
