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#include "main.h"
#include "writer_jpg.h"
#include "api__jpeg.h"
#include <api/memmgr/api_memmgr.h>
#include <shlwapi.h>
#include <strsafe.h>
/*BIG BIG THING TO NOTE
I have modified jmorecfg.h line 319 to specify 4 bytes per pixel with RGB. it is normally three.
*/
extern "C" {
#undef FAR
#include "jpeglib.h"
};
JpgWrite::JpgWrite() : quality(80) {}
// valid items include "quality" for jpeg files with value "0" to "100", "lossless" returns "1" if it is "0" otherwise
// return value is 1 if the config item is supported, 0 if it is not.
int JpgWrite::setConfig(const wchar_t * item, const wchar_t * value) {
if(!_wcsicmp(item,L"quality")) quality = _wtoi(value);
else return 0;
return 1;
}
int JpgWrite::getConfig(const wchar_t * item, wchar_t * value, int valuelen) {
if(!_wcsicmp(item,L"lossless")) lstrcpynW(value,L"0",valuelen);
else if(!_wcsicmp(item,L"quality")) StringCchPrintfW(value,valuelen,L"%d",quality);
else return 0;
return 1;
}
int JpgWrite::bitDepthSupported(int depth) {
if(depth == 32 || depth == 24) return 1;
return 0;
}
extern "C" {
typedef struct {
jpeg_destination_mgr pub;
BYTE *buf;
int len;
} my_destination_mgr;
void init_destination(j_compress_ptr cinfo){}
boolean empty_output_buffer(j_compress_ptr cinfo) {
my_destination_mgr* m = (my_destination_mgr*)cinfo->dest;
int used = m->len;
int d = ((m->len / 4) & 0xffffff00) + 0x100;
if(d < 4096) d = 4096;
m->len+=d;
m->buf = (BYTE*)WASABI_API_MEMMGR->sysRealloc(m->buf,m->len);
m->pub.next_output_byte = m->buf + used;
m->pub.free_in_buffer = d;
return TRUE;
}
void term_destination(j_compress_ptr cinfo){}
};
// returns the image in our format, free the returned buffer with api_memmgr::sysFree()
void * JpgWrite::convert(const void *pixels, int bitDepth, int w, int h, int *length) {
if(bitDepth != 32 && bitDepth != 24) return 0;
jpeg_compress_struct cinfo={0};
jpeg_error_mgr jerr;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
// a guess at the final size...
int allocsize = (int(double(w*h)*0.2) & 0xffffff00) + 0x100;
if (allocsize < 4096) allocsize = 4096;
// set up our output stream
my_destination_mgr dest = {{0,(size_t)allocsize,init_destination,empty_output_buffer,term_destination},0,allocsize};
dest.buf = (BYTE*)WASABI_API_MEMMGR->sysMalloc(allocsize);
dest.pub.next_output_byte = dest.buf;
cinfo.dest = (jpeg_destination_mgr*)&dest;
// image parameters
cinfo.image_width = w;
cinfo.image_height = h;
cinfo.input_components = 4;
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);
jpeg_start_compress(&cinfo, TRUE);
int row_stride = w * 4;
BYTE * scanline = (BYTE *)malloc(row_stride);
if(bitDepth == 32) {
const ARGB32 * p = ((const ARGB32*)pixels);// + (h * w);
while (cinfo.next_scanline < cinfo.image_height) {
//p-=w;
memcpy(scanline,p,row_stride);
for(unsigned int i=0; i < cinfo.image_width; i++)
((ARGB32*)scanline)[i] = ((p[i] & 0x0000ff) << 16) | (p[i] & 0x00ff00) | ((p[i] & 0xff0000) >> 16);
jpeg_write_scanlines(&cinfo, &scanline, 1);
p+=w;
}
} else if(bitDepth == 24) { // FUCKO: untested
const BYTE * p = ((const BYTE*)pixels);// + (h * w * 3);
while (cinfo.next_scanline < cinfo.image_height) {
//p-=w*3;
memcpy(scanline,p,row_stride);
int l = cinfo.image_width * 4;
for(int i=0,j=0; j < l; i+=3,j+=4) {
scanline[j] = p[i+2];
scanline[j+1] = p[i+1];
scanline[j+2] = p[i];
}
jpeg_write_scanlines(&cinfo, &scanline, 1);
p+=w*3;
}
}
free(scanline);
jpeg_finish_compress(&cinfo);
if(length) *length = int(dest.len - dest.pub.free_in_buffer);
jpeg_destroy_compress(&cinfo);
return dest.buf;
}
#define CBCLASS JpgWrite
START_DISPATCH;
CB(GETIMAGETYPENAME, getImageTypeName);
CB(GETEXTENSIONS, getExtensions);
CB(SETCONFIG, setConfig);
CB(GETCONFIG, getConfig);
CB(BITDEPTHSUPPORTED, bitDepthSupported);
CB(CONVERT, convert);
END_DISPATCH;
#undef CBCLASS
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