/**
Write a chunk in a PNG stream from the current position.
@param chunk_name Name of the chunk
@param chunk_data Chunk array
@param length Chunk length
@param hPngMemory PNG stream handle
*/
static void
mng_WriteChunk(BYTE *chunk_name, BYTE *chunk_data, DWORD length, FIMEMORY *hPngMemory) {
DWORD crc_file = 0;
// write a PNG chunk ...
// - length
mng_SwapLong(&length);
FreeImage_WriteMemory(&length, 1, 4, hPngMemory);
mng_SwapLong(&length);
// - chunk name
FreeImage_WriteMemory(chunk_name, 1, 4, hPngMemory);
if(chunk_data && length) {
// - chunk data
FreeImage_WriteMemory(chunk_data, 1, length, hPngMemory);
// - crc
crc_file = FreeImage_ZLibCRC32(0, chunk_name, 4);
crc_file = FreeImage_ZLibCRC32(crc_file, chunk_data, length);
mng_SwapLong(&crc_file);
FreeImage_WriteMemory(&crc_file, 1, 4, hPngMemory);
} else {
// - crc
crc_file = FreeImage_ZLibCRC32(0, chunk_name, 4);
mng_SwapLong(&crc_file);
FreeImage_WriteMemory(&crc_file, 1, 4, hPngMemory);
}
}
// Takes an image from the frame buffer and compresses it
int writeFrame(FIMEMORY *fiBuffer, FIBITMAP *fiImage, unsigned char imageType) {
/*
char msg[1024];
sprintf_s(msg, 1024, "imageType: %i", imageType);
MessageBox(NULL,msg,"ADES DEBUG", MB_OK);
*/
imageType = 2;
int errStatus = 1;
u_short imageWidth, imageHeight;
unsigned width, height, pitch, line;
BYTE *bits;
// Package image using correct compression
switch(imageType) {
case 0: // Send a raw frame
// Get image characteristics
width = FreeImage_GetWidth(fiImage);
height = FreeImage_GetHeight(fiImage);
pitch = FreeImage_GetPitch(fiImage);
line = FreeImage_GetLine(fiImage);
// Write out width and height
errStatus = FreeImage_SeekMemory(fiBuffer, 0, SEEK_SET);
if (errStatus != 1) break;
imageWidth = htons(width);
errStatus = FreeImage_WriteMemory( &imageWidth, 2, 1, fiBuffer );
if (errStatus != 1) break;
imageHeight = htons(height);
errStatus = FreeImage_WriteMemory( &imageHeight, 2, 1, fiBuffer );
if (errStatus != 1) break;
// Write out image (convert the bitmap to raw bits, top-left pixel first)
bits = (BYTE*)malloc(height * pitch);
FreeImage_ConvertToRawBits(bits, fiImage, pitch, 24,
FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK, TRUE);
errStatus = FreeImage_WriteMemory( bits, height*pitch*sizeof(BYTE), 1, fiBuffer );
free(bits);
if (errStatus != 1) break;
break;
default: // Send a jpg frame
errStatus = FreeImage_SeekMemory(fiBuffer, 0, SEEK_SET);
if (errStatus != 1) break;
errStatus = FreeImage_SaveToMemory(FIF_JPEG, fiImage, fiBuffer, convertToJpegFlag(imageType));
if (errStatus != 1) break;
break;
}
// Clean up and exit
return errStatus;
}
/**
Wrap a IDAT chunk as a PNG stream.
The stream has the structure { g_png_signature, IHDR, IDAT, IEND }
The image is assumed to be a greyscale image.
@param jng_width Image width
@param jng_height Image height
@param jng_alpha_sample_depth Bits per pixel
@param mChunk PNG grayscale IDAT format
@param mLength IDAT chunk length
@param hPngMemory Output memory stream
*/
static void
mng_WritePNGStream(DWORD jng_width, DWORD jng_height, BYTE jng_alpha_sample_depth, BYTE *mChunk, DWORD mLength, FIMEMORY *hPngMemory) {
// PNG grayscale IDAT format
BYTE data[14];
// wrap the IDAT chunk as a PNG stream
// write PNG file signature
FreeImage_WriteMemory(g_png_signature, 1, 8, hPngMemory);
// write a IHDR chunk ...
/*
The IHDR chunk must appear FIRST. It contains:
Width: 4 bytes
Height: 4 bytes
Bit depth: 1 byte
Color type: 1 byte
Compression method: 1 byte
Filter method: 1 byte
Interlace method: 1 byte
*/
// - chunk data
mng_SwapLong(&jng_width);
mng_SwapLong(&jng_height);
memcpy(&data[0], &jng_width, 4);
memcpy(&data[4], &jng_height, 4);
mng_SwapLong(&jng_width);
mng_SwapLong(&jng_height);
data[8] = jng_alpha_sample_depth;
data[9] = 0; // color_type gray (jng_color_type)
data[10] = 0; // compression method 0 (jng_alpha_compression_method)
data[11] = 0; // filter_method 0 (jng_alpha_filter_method)
data[12] = 0; // interlace_method 0 (jng_alpha_interlace_method)
mng_WriteChunk(mng_IHDR, &data[0], 13, hPngMemory);
// write a IDAT chunk ...
mng_WriteChunk(mng_IDAT, mChunk, mLength, hPngMemory);
// write a IEND chunk ...
mng_WriteChunk(mng_IEND, NULL, 0, hPngMemory);
}
/**
Insert a chunk just before the inNextChunkName chunk
@param hPngMemory PNG stream handle
@param start_pos Start position of the inNextChunkName chunk
@param next_pos Start position of the next chunk
@return Returns TRUE if successfull, returns FALSE otherwise
*/
static BOOL
mng_CopyInsertChunks(FIMEMORY *hPngMemory, BYTE *inNextChunkName, BYTE *inInsertChunk, DWORD inChunkLength, DWORD start_pos, DWORD next_pos) {
BYTE *data = NULL;
DWORD size_in_bytes = 0;
// length of the chunk to check
DWORD chunk_length = next_pos - start_pos;
if(chunk_length == 0) {
return TRUE;
}
// get a pointer to the stream buffer
FreeImage_AcquireMemory(hPngMemory, &data, &size_in_bytes);
if(!(data && size_in_bytes) || (size_in_bytes < 20) || (chunk_length >= size_in_bytes)) {
// not enough space to read a signature(8 bytes) + a chunk(at least 12 bytes)
return FALSE;
}
// new file length
unsigned buffer_size = inChunkLength + size_in_bytes;
BYTE *buffer = (BYTE*)malloc(buffer_size * sizeof(BYTE));
if(!buffer) {
return FALSE;
}
unsigned p = 0;
memcpy(&buffer[p], &data[0], start_pos);
p += start_pos;
memcpy(&buffer[p], inInsertChunk, inChunkLength);
p += inChunkLength;
memcpy(&buffer[p], &data[start_pos], size_in_bytes - start_pos);
// seek to the start of the stream
FreeImage_SeekMemory(hPngMemory, 0, SEEK_SET);
// re-write the stream
FreeImage_WriteMemory(buffer, 1, buffer_size, hPngMemory);
free(buffer);
return TRUE;
}
unsigned fipMemoryIO::write(const void *buffer, unsigned size, unsigned count) {
return FreeImage_WriteMemory(buffer, size, count, _hmem);
}
/**
Output function. Should return 1 if writing was successful.
data/data_size is the segment of data to write, and 'picture' is for
reference (and so one can make use of picture->custom_ptr).
*/
static int
WebP_MemoryWriter(const BYTE *data, size_t data_size, const WebPPicture* const picture) {
FIMEMORY *hmem = (FIMEMORY*)picture->custom_ptr;
return data_size ? (FreeImage_WriteMemory(data, 1, (unsigned)data_size, hmem) == data_size) : 0;
}
/**
Load a FIBITMAP from a MNG or a JNG stream
@param format_id ID of the caller
@param io Stream i/o functions
@param handle Stream handle
@param Offset Start of the first chunk
@param flags Loading flags
@return Returns a dib if successful, returns NULL otherwise
*/
FIBITMAP*
mng_ReadChunks(int format_id, FreeImageIO *io, fi_handle handle, long Offset, int flags = 0) {
DWORD mLength = 0;
BYTE mChunkName[5];
BYTE *mChunk = NULL;
DWORD crc_file;
long LastOffset;
long mOrigPos;
BYTE *PLTE_file_chunk = NULL; // whole PLTE chunk (lentgh, name, array, crc)
DWORD PLTE_file_size = 0; // size of PLTE chunk
BOOL m_HasGlobalPalette = FALSE; // may turn to TRUE in PLTE chunk
unsigned m_TotalBytesOfChunks = 0;
FIBITMAP *dib = NULL;
FIBITMAP *dib_alpha = NULL;
FIMEMORY *hJpegMemory = NULL;
FIMEMORY *hPngMemory = NULL;
FIMEMORY *hIDATMemory = NULL;
// ---
DWORD jng_width = 0;
DWORD jng_height = 0;
BYTE jng_color_type = 0;
BYTE jng_image_sample_depth = 0;
BYTE jng_image_compression_method = 0;
BYTE jng_alpha_sample_depth = 0;
BYTE jng_alpha_compression_method = 0;
BYTE jng_alpha_filter_method = 0;
BYTE jng_alpha_interlace_method = 0;
DWORD mng_frame_width = 0;
DWORD mng_frame_height = 0;
DWORD mng_ticks_per_second = 0;
DWORD mng_nominal_layer_count = 0;
DWORD mng_nominal_frame_count = 0;
DWORD mng_nominal_play_time = 0;
DWORD mng_simplicity_profile = 0;
DWORD res_x = 2835; // 72 dpi
DWORD res_y = 2835; // 72 dpi
RGBQUAD rgbBkColor = {0, 0, 0, 0};
WORD bk_red, bk_green, bk_blue;
BOOL hasBkColor = FALSE;
BOOL mHasIDAT = FALSE;
tEXtMAP key_value_pair;
// ---
BOOL header_only = (flags & FIF_LOAD_NOPIXELS) == FIF_LOAD_NOPIXELS;
// get the file size
const long mLOF = mng_LOF(io, handle);
// go to the first chunk
io->seek_proc(handle, Offset, SEEK_SET);
try {
BOOL mEnd = FALSE;
while(mEnd == FALSE) {
// start of the chunk
LastOffset = io->tell_proc(handle);
// read length
mLength = 0;
io->read_proc(&mLength, 1, sizeof(mLength), handle);
mng_SwapLong(&mLength);
// read name
io->read_proc(&mChunkName[0], 1, 4, handle);
mChunkName[4] = '\0';
if(mLength > 0) {
mChunk = (BYTE*)realloc(mChunk, mLength);
if(!mChunk) {
FreeImage_OutputMessageProc(format_id, "Error while parsing %s chunk: out of memory", mChunkName);
throw (const char*)NULL;
}
Offset = io->tell_proc(handle);
if(Offset + (long)mLength > mLOF) {
FreeImage_OutputMessageProc(format_id, "Error while parsing %s chunk: unexpected end of file", mChunkName);
throw (const char*)NULL;
}
// read chunk
io->read_proc(mChunk, 1, mLength, handle);
}
// read crc
io->read_proc(&crc_file, 1, sizeof(crc_file), handle);
mng_SwapLong(&crc_file);
// check crc
DWORD crc_check = FreeImage_ZLibCRC32(0, &mChunkName[0], 4);
crc_check = FreeImage_ZLibCRC32(crc_check, mChunk, mLength);
if(crc_check != crc_file) {
FreeImage_OutputMessageProc(format_id, "Error while parsing %s chunk: bad CRC", mChunkName);
throw (const char*)NULL;
}
switch( mng_GetChunckType(mChunkName) ) {
case MHDR:
// The MHDR chunk is always first in all MNG datastreams except for those
// that consist of a single PNG or JNG datastream with a PNG or JNG signature.
if(mLength == 28) {
memcpy(&mng_frame_width, &mChunk[0], 4);
memcpy(&mng_frame_height, &mChunk[4], 4);
memcpy(&mng_ticks_per_second, &mChunk[8], 4);
memcpy(&mng_nominal_layer_count, &mChunk[12], 4);
memcpy(&mng_nominal_frame_count, &mChunk[16], 4);
memcpy(&mng_nominal_play_time, &mChunk[20], 4);
memcpy(&mng_simplicity_profile, &mChunk[24], 4);
mng_SwapLong(&mng_frame_width);
mng_SwapLong(&mng_frame_height);
mng_SwapLong(&mng_ticks_per_second);
mng_SwapLong(&mng_nominal_layer_count);
mng_SwapLong(&mng_nominal_frame_count);
mng_SwapLong(&mng_nominal_play_time);
mng_SwapLong(&mng_simplicity_profile);
} else {
FreeImage_OutputMessageProc(format_id, "Error while parsing %s chunk: size is %d instead of 28", mChunkName, mLength);
}
break;
case MEND:
mEnd = TRUE;
break;
case LOOP:
case ENDL:
break;
case DEFI:
break;
case SAVE:
case SEEK:
case TERM:
break;
case BACK:
break;
// Global "PLTE" and "tRNS" (if any). PNG "PLTE" will be of 0 byte, as it uses global data.
case PLTE: // Global
m_HasGlobalPalette = TRUE;
PLTE_file_size = mLength + 12; // (lentgh, name, array, crc) = (4, 4, mLength, 4)
PLTE_file_chunk = (BYTE*)realloc(PLTE_file_chunk, PLTE_file_size);
if(!PLTE_file_chunk) {
FreeImage_OutputMessageProc(format_id, "Error while parsing %s chunk: out of memory", mChunkName);
throw (const char*)NULL;
} else {
mOrigPos = io->tell_proc(handle);
// seek to the start of the chunk
io->seek_proc(handle, LastOffset, SEEK_SET);
// load the whole chunk
io->read_proc(PLTE_file_chunk, 1, PLTE_file_size, handle);
// go to the start of the next chunk
io->seek_proc(handle, mOrigPos, SEEK_SET);
}
break;
case tRNS: // Global
break;
case IHDR:
Offset = LastOffset;
// parse the PNG file and get its file size
if(mng_CountPNGChunks(io, handle, Offset, &m_TotalBytesOfChunks) == FALSE) {
// reach an unexpected end of file
mEnd = TRUE;
FreeImage_OutputMessageProc(format_id, "Error while parsing %s chunk: unexpected end of PNG file", mChunkName);
break;
}
// wrap the { IHDR, ..., IEND } chunks as a PNG stream
if(hPngMemory == NULL) {
hPngMemory = FreeImage_OpenMemory();
}
mOrigPos = io->tell_proc(handle);
// write PNG file signature
FreeImage_SeekMemory(hPngMemory, 0, SEEK_SET);
FreeImage_WriteMemory(g_png_signature, 1, 8, hPngMemory);
mChunk = (BYTE*)realloc(mChunk, m_TotalBytesOfChunks);
if(!mChunk) {
FreeImage_OutputMessageProc(format_id, "Error while parsing %s chunk: out of memory", mChunkName);
throw (const char*)NULL;
}
// on calling CountPNGChunks earlier, we were in Offset pos,
// go back there
io->seek_proc(handle, Offset, SEEK_SET);
io->read_proc(mChunk, 1, m_TotalBytesOfChunks, handle);
// Put back to original pos
io->seek_proc(handle, mOrigPos, SEEK_SET);
// write the PNG chunks
FreeImage_WriteMemory(mChunk, 1, m_TotalBytesOfChunks, hPngMemory);
// plug in global PLTE if local PLTE exists
if(m_HasGlobalPalette) {
// ensure we remove some local chunks, so that global
// "PLTE" can be inserted right before "IDAT".
mng_RemoveChunk(hPngMemory, mng_PLTE);
mng_RemoveChunk(hPngMemory, mng_tRNS);
mng_RemoveChunk(hPngMemory, mng_bKGD);
// insert global "PLTE" chunk in its entirety before "IDAT"
mng_InsertChunk(hPngMemory, mng_IDAT, PLTE_file_chunk, PLTE_file_size);
}
if(dib) FreeImage_Unload(dib);
dib = mng_LoadFromMemoryHandle(hPngMemory, flags);
// stop after the first image
mEnd = TRUE;
break;
case JHDR:
if(mLength == 16) {
memcpy(&jng_width, &mChunk[0], 4);
memcpy(&jng_height, &mChunk[4], 4);
mng_SwapLong(&jng_width);
mng_SwapLong(&jng_height);
jng_color_type = mChunk[8];
jng_image_sample_depth = mChunk[9];
jng_image_compression_method = mChunk[10];
//BYTE jng_image_interlace_method = mChunk[11]; // for debug only
jng_alpha_sample_depth = mChunk[12];
jng_alpha_compression_method = mChunk[13];
jng_alpha_filter_method = mChunk[14];
jng_alpha_interlace_method = mChunk[15];
} else {
FreeImage_OutputMessageProc(format_id, "Error while parsing %s chunk: invalid chunk length", mChunkName);
throw (const char*)NULL;
}
break;
case JDAT:
if(hJpegMemory == NULL) {
hJpegMemory = FreeImage_OpenMemory();
}
// as there may be several JDAT chunks, concatenate them
FreeImage_WriteMemory(mChunk, 1, mLength, hJpegMemory);
break;
case IDAT:
if(!header_only && (jng_alpha_compression_method == 0)) {
// PNG grayscale IDAT format
if(hIDATMemory == NULL) {
hIDATMemory = FreeImage_OpenMemory();
mHasIDAT = TRUE;
}
// as there may be several IDAT chunks, concatenate them
FreeImage_WriteMemory(mChunk, 1, mLength, hIDATMemory);
}
break;
case IEND:
if(!hJpegMemory) {
mEnd = TRUE;
break;
}
// load the JPEG
if(dib) {
FreeImage_Unload(dib);
}
dib = mng_LoadFromMemoryHandle(hJpegMemory, flags);
// load the PNG alpha layer
if(mHasIDAT) {
BYTE *data = NULL;
DWORD size_in_bytes = 0;
// get a pointer to the IDAT buffer
FreeImage_AcquireMemory(hIDATMemory, &data, &size_in_bytes);
if(data && size_in_bytes) {
// wrap the IDAT chunk as a PNG stream
if(hPngMemory == NULL) {
hPngMemory = FreeImage_OpenMemory();
}
mng_WritePNGStream(jng_width, jng_height, jng_alpha_sample_depth, data, size_in_bytes, hPngMemory);
// load the PNG
if(dib_alpha) {
FreeImage_Unload(dib_alpha);
}
dib_alpha = mng_LoadFromMemoryHandle(hPngMemory, flags);
}
}
// stop the parsing
mEnd = TRUE;
break;
case JDAA:
break;
case gAMA:
break;
case pHYs:
// unit is pixels per meter
memcpy(&res_x, &mChunk[0], 4);
mng_SwapLong(&res_x);
memcpy(&res_y, &mChunk[4], 4);
mng_SwapLong(&res_y);
break;
case bKGD:
memcpy(&bk_red, &mChunk[0], 2);
mng_SwapShort(&bk_red);
rgbBkColor.rgbRed = (BYTE)bk_red;
memcpy(&bk_green, &mChunk[2], 2);
mng_SwapShort(&bk_green);
rgbBkColor.rgbGreen = (BYTE)bk_green;
memcpy(&bk_blue, &mChunk[4], 2);
mng_SwapShort(&bk_blue);
rgbBkColor.rgbBlue = (BYTE)bk_blue;
hasBkColor = TRUE;
break;
case tEXt:
mng_SetMetadata_tEXt(key_value_pair, mChunk, mLength);
break;
case UNKNOWN_CHUNCK:
default:
break;
} // switch( GetChunckType )
} // while(!mEnd)
FreeImage_CloseMemory(hJpegMemory);
FreeImage_CloseMemory(hPngMemory);
FreeImage_CloseMemory(hIDATMemory);
free(mChunk);
free(PLTE_file_chunk);
// convert to 32-bit if a transparent layer is available
if(!header_only && dib_alpha) {
FIBITMAP *dst = FreeImage_ConvertTo32Bits(dib);
if((FreeImage_GetBPP(dib_alpha) == 8) && (FreeImage_GetImageType(dib_alpha) == FIT_BITMAP)) {
FreeImage_SetChannel(dst, dib_alpha, FICC_ALPHA);
} else {
FIBITMAP *dst_alpha = FreeImage_ConvertTo8Bits(dib_alpha);
FreeImage_SetChannel(dst, dst_alpha, FICC_ALPHA);
FreeImage_Unload(dst_alpha);
}
FreeImage_Unload(dib);
dib = dst;
}
FreeImage_Unload(dib_alpha);
if(dib) {
// set metadata
FreeImage_SetDotsPerMeterX(dib, res_x);
FreeImage_SetDotsPerMeterY(dib, res_y);
if(hasBkColor) {
FreeImage_SetBackgroundColor(dib, &rgbBkColor);
}
if(key_value_pair.size()) {
for(tEXtMAP::iterator j = key_value_pair.begin(); j != key_value_pair.end(); j++) {
std::string key = (*j).first;
std::string value = (*j).second;
mng_SetKeyValue(FIMD_COMMENTS, dib, key.c_str(), value.c_str());
}
}
}
return dib;
} catch(const char *text) {
FreeImage_CloseMemory(hJpegMemory);
FreeImage_CloseMemory(hPngMemory);
FreeImage_CloseMemory(hIDATMemory);
free(mChunk);
free(PLTE_file_chunk);
FreeImage_Unload(dib);
FreeImage_Unload(dib_alpha);
if(text) {
FreeImage_OutputMessageProc(format_id, text);
}
return NULL;
}
}
/**
Write a FIBITMAP to a JNG stream
@param format_id ID of the caller
@param io Stream i/o functions
@param dib Image to be saved
@param handle Stream handle
@param flags Saving flags
@return Returns TRUE if successful, returns FALSE otherwise
*/
BOOL
mng_WriteJNG(int format_id, FreeImageIO *io, FIBITMAP *dib, fi_handle handle, int flags) {
DWORD jng_width = 0;
DWORD jng_height = 0;
BYTE jng_color_type = 0;
BYTE jng_image_sample_depth = 8;
BYTE jng_image_compression_method = 8; // 8: ISO-10918-1 Huffman-coded baseline JPEG.
BYTE jng_image_interlace_method = 0;
BYTE jng_alpha_sample_depth = 0;
BYTE jng_alpha_compression_method = 0;
BYTE jng_alpha_filter_method = 0;
BYTE jng_alpha_interlace_method = 0;
BYTE buffer[16];
FIMEMORY *hJngMemory = NULL;
FIMEMORY *hJpegMemory = NULL;
FIMEMORY *hPngMemory = NULL;
FIBITMAP *dib_rgb = NULL;
FIBITMAP *dib_alpha = NULL;
if(!dib || (FreeImage_GetImageType(dib) != FIT_BITMAP)) {
return FALSE;
}
unsigned bpp = FreeImage_GetBPP(dib);
switch(bpp) {
case 8:
if(FreeImage_GetColorType(dib) == FIC_MINISBLACK) {
dib_rgb = dib;
jng_color_type = MNG_COLORTYPE_JPEGGRAY;
} else {
// JPEG plugin will convert other types (FIC_MINISWHITE, FIC_PALETTE) to 24-bit on the fly
//dib_rgb = FreeImage_ConvertTo24Bits(dib);
dib_rgb = dib;
jng_color_type = MNG_COLORTYPE_JPEGCOLOR;
}
break;
case 24:
dib_rgb = dib;
jng_color_type = MNG_COLORTYPE_JPEGCOLOR;
break;
case 32:
dib_rgb = FreeImage_ConvertTo24Bits(dib);
jng_color_type = MNG_COLORTYPE_JPEGCOLORA;
jng_alpha_sample_depth = 8;
break;
default:
return FALSE;
}
jng_width = (DWORD)FreeImage_GetWidth(dib);
jng_height = (DWORD)FreeImage_GetHeight(dib);
try {
hJngMemory = FreeImage_OpenMemory();
// --- write JNG file signature ---
FreeImage_WriteMemory(g_jng_signature, 1, 8, hJngMemory);
// --- write a JHDR chunk ---
SwapLong(&jng_width);
SwapLong(&jng_height);
memcpy(&buffer[0], &jng_width, 4);
memcpy(&buffer[4], &jng_height, 4);
SwapLong(&jng_width);
SwapLong(&jng_height);
buffer[8] = jng_color_type;
buffer[9] = jng_image_sample_depth;
buffer[10] = jng_image_compression_method;
buffer[11] = jng_image_interlace_method;
buffer[12] = jng_alpha_sample_depth;
buffer[13] = jng_alpha_compression_method;
buffer[14] = jng_alpha_filter_method;
buffer[15] = jng_alpha_interlace_method;
mng_WriteChunk(mng_JHDR, &buffer[0], 16, hJngMemory);
// --- write a sequence of JDAT chunks ---
hJpegMemory = FreeImage_OpenMemory();
flags |= JPEG_BASELINE;
if(!FreeImage_SaveToMemory(FIF_JPEG, dib_rgb, hJpegMemory, flags)) {
throw (const char*)NULL;
}
if(dib_rgb != dib) {
FreeImage_Unload(dib_rgb);
dib_rgb = NULL;
}
{
BYTE *jpeg_data = NULL;
DWORD size_in_bytes = 0;
// get a pointer to the stream buffer
FreeImage_AcquireMemory(hJpegMemory, &jpeg_data, &size_in_bytes);
// write chunks
for(DWORD k = 0; k < size_in_bytes;) {
DWORD bytes_left = size_in_bytes - k;
DWORD chunk_size = MIN(JPEG_CHUNK_SIZE, bytes_left);
mng_WriteChunk(mng_JDAT, &jpeg_data[k], chunk_size, hJngMemory);
k += chunk_size;
}
}
FreeImage_CloseMemory(hJpegMemory);
hJpegMemory = NULL;
// --- write alpha layer as a sequence of IDAT chunk ---
if((bpp == 32) && (jng_color_type == MNG_COLORTYPE_JPEGCOLORA)) {
dib_alpha = FreeImage_GetChannel(dib, FICC_ALPHA);
hPngMemory = FreeImage_OpenMemory();
if(!FreeImage_SaveToMemory(FIF_PNG, dib_alpha, hPngMemory, PNG_DEFAULT)) {
throw (const char*)NULL;
}
FreeImage_Unload(dib_alpha);
dib_alpha = NULL;
// get the IDAT chunk
{
BOOL bResult = FALSE;
DWORD start_pos = 0;
DWORD next_pos = 0;
long offset = 8;
do {
// find the next IDAT chunk from 'offset' position
bResult = mng_FindChunk(hPngMemory, mng_IDAT, offset, &start_pos, &next_pos);
if(!bResult) break;
BYTE *png_data = NULL;
DWORD size_in_bytes = 0;
// get a pointer to the stream buffer
FreeImage_AcquireMemory(hPngMemory, &png_data, &size_in_bytes);
// write the IDAT chunk
mng_WriteChunk(mng_IDAT, &png_data[start_pos+8], next_pos - start_pos - 12, hJngMemory);
offset = next_pos;
} while(bResult);
}
FreeImage_CloseMemory(hPngMemory);
hPngMemory = NULL;
}
// --- write a IEND chunk ---
mng_WriteChunk(mng_IEND, NULL, 0, hJngMemory);
// write the JNG on output stream
{
BYTE *jng_data = NULL;
DWORD size_in_bytes = 0;
FreeImage_AcquireMemory(hJngMemory, &jng_data, &size_in_bytes);
io->write_proc(jng_data, 1, size_in_bytes, handle);
}
FreeImage_CloseMemory(hJngMemory);
FreeImage_CloseMemory(hJpegMemory);
FreeImage_CloseMemory(hPngMemory);
return TRUE;
} catch(const char *text) {
FreeImage_CloseMemory(hJngMemory);
FreeImage_CloseMemory(hJpegMemory);
FreeImage_CloseMemory(hPngMemory);
if(dib_rgb && (dib_rgb != dib)) {
FreeImage_Unload(dib_rgb);
}
FreeImage_Unload(dib_alpha);
if(text) {
FreeImage_OutputMessageProc(format_id, text);
}
return FALSE;
}
}
/**
Write a metadata model as a TIF IFD to a FIMEMORY handle.
The entries in the TIF IFD are sorted in ascending order by tag id.
The last entry is written as 0 (4 bytes) which means no more IFD to follow.
Supported metadata models are
<ul>
<li>FIMD_EXIF_MAIN
<li>FIMD_EXIF_EXIF
<li>FIMD_EXIF_GPS
<li>FIMD_EXIF_INTEROP
</ul>
The end of the buffer is filled with 4 bytes equal to 0 (end of IFD offset)
@param dib Input FIBITMAP
@param md_model Metadata model to write
@param hmem Memory handle
@return Returns TRUE if successful, FALSE otherwise
@see tiff_get_ifd_profile
*/
static BOOL
tiff_write_ifd(FIBITMAP *dib, FREE_IMAGE_MDMODEL md_model, FIMEMORY *hmem) {
FITAG *tag = NULL;
FIMETADATA *mdhandle = NULL;
std::vector<FITAG*> vTagList;
TagLib::MDMODEL internal_md_model;
DWORD ifd_offset = 0; // WORD-aligned IFD value offset
const BYTE empty_byte = 0;
// start of the file
const long start_of_file = FreeImage_TellMemory(hmem);
// get the metadata count
unsigned metadata_count = FreeImage_GetMetadataCount(md_model, dib);
if(metadata_count == 0) {
return FALSE;
}
TagLib& s = TagLib::instance();
// check for supported metadata models
switch(md_model) {
case FIMD_EXIF_MAIN:
internal_md_model = TagLib::EXIF_MAIN;
break;
case FIMD_EXIF_EXIF:
internal_md_model = TagLib::EXIF_EXIF;
break;
case FIMD_EXIF_GPS:
internal_md_model = TagLib::EXIF_GPS;
break;
case FIMD_EXIF_INTEROP:
internal_md_model = TagLib::EXIF_INTEROP;
break;
default:
return FALSE;
}
try {
// 1) according to the TIFF specifications,
// the entries in a TIF IFD must be sorted in ascending order by tag id
// store the tags into a vector
vTagList.reserve(metadata_count);
mdhandle = FreeImage_FindFirstMetadata(md_model, dib, &tag);
if(mdhandle) {
// parse the tags and store them inside vTagList
do {
// rewrite the tag id using FreeImage internal database
// (in case the tag id is wrong or missing)
const char *key = FreeImage_GetTagKey(tag);
int tag_id = s.getTagID(internal_md_model, key);
if(tag_id != -1) {
// this is a known tag, set the tag ID
FreeImage_SetTagID(tag, (WORD)tag_id);
// record the tag
vTagList.push_back(tag);
}
// else ignore this tag
} while(FreeImage_FindNextMetadata(mdhandle, &tag));
FreeImage_FindCloseMetadata(mdhandle);
// sort the vector by tag id
std::sort(vTagList.begin(), vTagList.end(), PredicateTagIDCompare());
// update the metadata_count
metadata_count = (unsigned)vTagList.size();
} else {
throw(1);
}
// 2) prepare the place for each IFD entries.
/*
An Image File Directory (IFD) consists of a 2-byte count of the number of directory entries (i.e., the number of fields),
followed by a sequence of 12-byte field entries,
followed by a 4-byte offset of the next IFD (or 0 if none). Do not forget to write the 4 bytes of 0 after the last IFD.
*/
{
// prepare place for 2 bytes for number of entries + 12 bytes for each entry
unsigned ifd_size = 2 + 12 * metadata_count;
FreeImage_WriteMemory(&empty_byte, 1, ifd_size, hmem);
// record the offset used to write values > 4-bytes
ifd_offset = FreeImage_TellMemory(hmem);
// rewind
FreeImage_SeekMemory(hmem, start_of_file, SEEK_SET);
}
// 3) write each IFD entry in tag id ascending order
// number of directory entries
WORD nde = (WORD)metadata_count;
FreeImage_WriteMemory(&nde, 1, 2, hmem);
// for each entry ...
for(unsigned i = 0; i < metadata_count; i++) {
FITAG *tag = vTagList[i];
// tag id
WORD tag_id = FreeImage_GetTagID(tag);
FreeImage_WriteMemory(&tag_id, 1, 2, hmem);
// tag type (compliant with TIFF specification)
WORD tag_type = (WORD)FreeImage_GetTagType(tag);
FreeImage_WriteMemory(&tag_type, 1, 2, hmem);
// tag count
DWORD tag_count = FreeImage_GetTagCount(tag);
FreeImage_WriteMemory(&tag_count, 1, 4, hmem);
// tag value or offset (results are in BYTE's units)
unsigned tag_length = FreeImage_GetTagLength(tag);
if(tag_length <= 4) {
// 4 bytes or less, write the value (left justified)
const BYTE *tag_value = (BYTE*)FreeImage_GetTagValue(tag);
FreeImage_WriteMemory(tag_value, 1, tag_length, hmem);
for(unsigned k = tag_length; k < 4; k++) {
FreeImage_WriteMemory(&empty_byte, 1, 1, hmem);
}
} else {
// write an offset
FreeImage_WriteMemory(&ifd_offset, 1, 4, hmem);
// write the value
long current_position = FreeImage_TellMemory(hmem);
FreeImage_SeekMemory(hmem, ifd_offset, SEEK_SET);
FreeImage_WriteMemory(FreeImage_GetTagValue(tag), 1, tag_length, hmem);
if(tag_length & 1) {
// align to the next WORD boundary
FreeImage_WriteMemory(&empty_byte, 1, 1, hmem);
}
// next offset to use
ifd_offset = FreeImage_TellMemory(hmem);
// rewind
FreeImage_SeekMemory(hmem, current_position, SEEK_SET);
}
}
// end-of-IFD or next IFD (0 == none)
FreeImage_SeekMemory(hmem, ifd_offset, SEEK_SET);
FreeImage_WriteMemory(&empty_byte, 1, 4, hmem);
return TRUE;
}
catch(int) {
return FALSE;
}
}
static int
copyFaxFile(FreeImageIO *io, fi_handle handle, TIFF* tifin, uint32 xsize, int stretch, FIMEMORY *memory) {
BYTE *rowbuf = NULL;
BYTE *refbuf = NULL;
uint32 row;
uint16 badrun;
uint16 badfaxrun;
uint32 badfaxlines;
int ok;
try {
uint32 linesize = TIFFhowmany8(xsize);
rowbuf = (BYTE*) _TIFFmalloc(linesize);
refbuf = (BYTE*) _TIFFmalloc(linesize);
if (rowbuf == NULL || refbuf == NULL) {
throw FI_MSG_ERROR_MEMORY;
}
tifin->tif_rawdatasize = G3GetFileSize(io, handle);
tifin->tif_rawdata = (tidata_t) _TIFFmalloc(tifin->tif_rawdatasize);
if (tifin->tif_rawdata == NULL) {
throw FI_MSG_ERROR_MEMORY;
}
if(!G3ReadFile(io, handle, tifin->tif_rawdata, tifin->tif_rawdatasize)) {
throw "Read error at scanline 0";
}
tifin->tif_rawcp = tifin->tif_rawdata;
tifin->tif_rawcc = tifin->tif_rawdatasize;
(*tifin->tif_setupdecode)(tifin);
(*tifin->tif_predecode)(tifin, (uint16) 0);
tifin->tif_row = 0;
badfaxlines = 0;
badfaxrun = 0;
_TIFFmemset(refbuf, 0, linesize);
row = 0;
badrun = 0; // current run of bad lines
while (tifin->tif_rawcc > 0) {
ok = (*tifin->tif_decoderow)(tifin, rowbuf, linesize, 0);
if (!ok) {
badfaxlines++;
badrun++;
// regenerate line from previous good line
_TIFFmemcpy(rowbuf, refbuf, linesize);
} else {
if (badrun > badfaxrun)
badfaxrun = badrun;
badrun = 0;
_TIFFmemcpy(refbuf, rowbuf, linesize);
}
tifin->tif_row++;
FreeImage_WriteMemory(rowbuf, linesize, 1, memory);
row++;
if (stretch) {
FreeImage_WriteMemory(rowbuf, linesize, 1, memory);
row++;
}
}
if (badrun > badfaxrun)
badfaxrun = badrun;
_TIFFfree(tifin->tif_rawdata);
tifin->tif_rawdata = NULL;
_TIFFfree(rowbuf);
_TIFFfree(refbuf);
/*
if (verbose) {
fprintf(stderr, "%d rows in input\n", rows);
fprintf(stderr, "%ld total bad rows\n", (long) badfaxlines);
fprintf(stderr, "%d max consecutive bad rows\n", badfaxrun);
}
*/
} catch(const char *message) {
if(rowbuf) _TIFFfree(rowbuf);
if(refbuf) _TIFFfree(refbuf);
if(tifin->tif_rawdata) {
_TIFFfree(tifin->tif_rawdata);
tifin->tif_rawdata = NULL;
}
FreeImage_OutputMessageProc(s_format_id, message);
return -1;
}
return (row);
}
