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// ==========================================================
// JNG loader
//
// Design and implementation by
// - Herve Drolon (drolon@infonie.fr)
//
// This file is part of FreeImage 3
//
// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
// THIS DISCLAIMER.
//
// Use at your own risk!
// ==========================================================
#include "FreeImage.h"
#include "Utilities.h"
// ==========================================================
// Plugin Interface
// ==========================================================
static int s_format_id;
// ----------------------------------------------------------
#define JNG_SIGNATURE_SIZE 8 // size of the signature
// ----------------------------------------------------------
// ----------------------------------------------------------
// mng interface (see MNGHelper.cpp)
// ----------------------------------------------------------
FIBITMAP* mng_ReadChunks(int format_id, FreeImageIO *io, fi_handle handle, long Offset, int flags = 0);
BOOL mng_WriteJNG(int format_id, FreeImageIO *io, FIBITMAP *dib, fi_handle handle, int flags);
// ==========================================================
// Plugin Implementation
// ==========================================================
static const char * DLL_CALLCONV
Format() {
return "JNG";
}
static const char * DLL_CALLCONV
Description() {
return "JPEG Network Graphics";
}
static const char * DLL_CALLCONV
Extension() {
return "jng";
}
static const char * DLL_CALLCONV
RegExpr() {
return NULL;
}
static const char * DLL_CALLCONV
MimeType() {
return "image/x-mng";
}
static BOOL DLL_CALLCONV
Validate(FreeImageIO *io, fi_handle handle) {
BYTE jng_signature[8] = { 139, 74, 78, 71, 13, 10, 26, 10 };
BYTE signature[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
io->read_proc(&signature, 1, JNG_SIGNATURE_SIZE, handle);
return (memcmp(jng_signature, signature, JNG_SIGNATURE_SIZE) == 0) ? TRUE : FALSE;
}
static BOOL DLL_CALLCONV
SupportsExportDepth(int depth) {
return (
(depth == 8) ||
(depth == 24) ||
(depth == 32)
);
}
static BOOL DLL_CALLCONV
SupportsExportType(FREE_IMAGE_TYPE type) {
return (type == FIT_BITMAP) ? TRUE : FALSE;
}
static BOOL DLL_CALLCONV
SupportsICCProfiles() {
return TRUE;
}
static BOOL DLL_CALLCONV
SupportsNoPixels() {
return TRUE;
}
// ----------------------------------------------------------
static void * DLL_CALLCONV
Open(FreeImageIO *io, fi_handle handle, BOOL read) {
return NULL;
}
static void DLL_CALLCONV
Close(FreeImageIO *io, fi_handle handle, void *data) {
}
static FIBITMAP * DLL_CALLCONV
Load(FreeImageIO *io, fi_handle handle, int page, int flags, void *data) {
long offset = JNG_SIGNATURE_SIZE; // move to skip first 8 bytes of signature
// check the signature (8 bytes)
if(Validate(io, handle) == FALSE) {
return NULL;
}
// parse chunks and decode a jng or mng bitmap
return mng_ReadChunks(s_format_id, io, handle, offset, flags);
}
static BOOL DLL_CALLCONV
Save(FreeImageIO *io, FIBITMAP *dib, fi_handle handle, int page, int flags, void *data) {
return mng_WriteJNG(s_format_id, io, dib, handle, flags);
}
// ==========================================================
// Init
// ==========================================================
void DLL_CALLCONV
InitJNG(Plugin *plugin, int format_id) {
s_format_id = format_id;
plugin->format_proc = Format;
plugin->description_proc = Description;
plugin->extension_proc = Extension;
plugin->regexpr_proc = RegExpr;
plugin->open_proc = Open;
plugin->close_proc = Close;
plugin->pagecount_proc = NULL;
plugin->pagecapability_proc = NULL;
plugin->load_proc = Load;
plugin->save_proc = Save;
plugin->validate_proc = Validate;
plugin->mime_proc = MimeType;
plugin->supports_export_bpp_proc = SupportsExportDepth;
plugin->supports_export_type_proc = SupportsExportType;
plugin->supports_icc_profiles_proc = SupportsICCProfiles;
plugin->supports_no_pixels_proc = SupportsNoPixels;
}
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