#include <stdio.h>
#include <stdlib.h>
extern "C" __stdcall lzma_set_dict_size(unsigned logdictsize);
extern "C" __stdcall lzma_compress(
const void* source,
void* destination,
unsigned length,
void* workmem);
typedef struct
{
short int sizeX;
short int sizeY;
int compressedSize;
int physicalOffset;
int uncompressedSize;
} SCompBmpHeader;
int main(int argc, char* argv[])
{
if (argc < 3)
{
printf("Usage: bmp2src <destination> <src1> <src2> ...\n");
return 1;
}
FILE* fo = fopen(argv[1], "wb");
if (!fo)
{
printf("Cannot create destination file\n");
return 2;
}
int n=0;
SCompBmpHeader* hea = (SCompBmpHeader*)malloc((argc-2)*sizeof(SCompBmpHeader));
void** ptrs = (void**)malloc((argc-2)*4);
lzma_set_dict_size(20);
void* workmem = (void*)malloc(0x509000 + (1<<20)*19/2);
for (int i=2;i<argc;i++)
{
FILE* fi = fopen(argv[i], "rb");
if (!fi)
{
printf("Cannot open input file %s\n",argv[i]);
continue;
}
unsigned char buf[0x36];
fread(buf,1,0x36,fi);
if (buf[0] != 'B' || buf[1] != 'M')
{
if (buf[0] != 0xFF || buf[1] != 0xD8)
{
printf("%s: unrecognized type\n",argv[i]);
fclose(fi);
continue;
}
// JPEG
printf("Processing %s ...",argv[i]);
fseek(fi,0,SEEK_END);
unsigned insize = ftell(fi);
void* output = malloc(insize);
unsigned char* ptr = (unsigned char*)output;
*ptr++ = 0xFF;
*ptr++ = 0xD8;
// Now load JPEG file, skipping all APPx markers
fseek(fi,2,SEEK_SET);
bool bOk = false;
for (;;)
{
if (fread(buf,1,4,fi) != 4 || buf[0] != 0xFF)
{
printf("%s: invalid JPEG file\n",argv[i]);
bOk = false;
break;
}
// ignore APPx markers
if (buf[1] >= 0xE0 && buf[1] <= 0xEF)
{
fseek(fi,buf[2]*256 + buf[3] - 2,SEEK_CUR);
continue;
}
unsigned len = buf[2]*256 + buf[3] + 2;
fseek(fi,-4,SEEK_CUR);
fread(ptr,1,len,fi);
if (buf[1]>=0xC0 && buf[1]<=0xCF && buf[1]!=0xC4 && buf[1]!=0xC8 && buf[1]!=0xCC)
{
// found SOFn marker
hea[i-2].sizeX = (unsigned char)ptr[4+3]*256 + (unsigned char)ptr[4+4];
hea[i-2].sizeY = (unsigned char)ptr[4+1]*256 + (unsigned char)ptr[4+2];
bOk = true;
}
ptr += len;
if (buf[1] == 0xDA)
{
// SOS marker
len = insize - ftell(fi);
fread(ptr,1,len,fi);
ptr += len;
break;
}
}
if (!bOk) {printf(" invalid\n");free(ptr);continue;}
hea[i-2].compressedSize = ptr - (unsigned char*)output;
hea[i-2].uncompressedSize = hea[i-2].compressedSize - 1;
hea[i-2].physicalOffset = (i==2) ? 0 :
hea[i-3].physicalOffset+hea[i-3].compressedSize;
ptrs[i-2] = output;
++n;
printf(" OK\n");
continue;
}
if (buf[0x1C] != 24)
{
printf("Input file %s is not 24-bit BMP\n",argv[i]);
fclose(fi);
continue;
}
int width = *(int*)(buf+0x12);
int linesize = (width*3+3)&~3;
int height = *(int*)(buf+0x16);
void* input = malloc(width*height*3);
void* packed = malloc(9*width*height*3/8 + 0x80);
for (int p=0;p<height;p++)
{
fseek(fi,(height-p-1)*linesize+0x36,SEEK_SET);
fread((char*)input+p*width*3, 1, width*3, fi);
}
fclose(fi);
hea[i-2].sizeX = (short)width;
hea[i-2].sizeY = (short)height;
unsigned uncompressedSize = width*height*3;
hea[i-2].uncompressedSize = uncompressedSize;
hea[i-2].physicalOffset = (i==2) ? 0 :
hea[i-3].physicalOffset+hea[i-3].compressedSize;
printf("Compressing %s ...",argv[i]);
unsigned compressedSize = lzma_compress(input,packed,
uncompressedSize,workmem);
if (compressedSize >= uncompressedSize)
{
compressedSize = uncompressedSize;
free(packed);
ptrs[i-2] = input;
}
else
{
ptrs[i-2] = packed;
free(input);
}
printf(" %d -> %d\n",uncompressedSize, compressedSize);
hea[i-2].compressedSize = compressedSize;
++n;
}
for (i=0;i<n;i++)
hea[i].physicalOffset += 4+n*sizeof(SCompBmpHeader);
fwrite(&n,4,1,fo);
fwrite(hea,sizeof(SCompBmpHeader),n,fo);
for (i=0;i<n;i++)
{
fwrite(ptrs[i],1,hea[i].compressedSize,fo);
free(ptrs[i]);
}
fclose(fo);
free(hea);
free(workmem);
free(ptrs);
return 0;
}