Exemplo n.º 1
0
int saveppm(char *filename, unsigned char *buf, int w, int h,
	enum BMPPIXELFORMAT f, int srcpitch, int srcbottomup)
{
	FILE *fs=NULL;  int retcode=0;
	unsigned char *tempbuf=NULL;

	if((fs=fopen(filename, "wb"))==NULL) _throw(strerror(errno));
	if(fprintf(fs, "P6\n")<1) _throw("Write error");
	if(fprintf(fs, "%d %d\n", w, h)<1) _throw("Write error");
	if(fprintf(fs, "255\n")<1) _throw("Write error");

	if((tempbuf=(unsigned char *)malloc(w*h*3))==NULL)
		_throw("Memory allocation error");

	pixelconvert(buf, f, srcpitch, tempbuf, BMP_RGB, w*3, w, h, 
		srcbottomup);

	if((fwrite(tempbuf, w*h*3, 1, fs))!=1) _throw("Write error");

	finally:
	if(tempbuf) free(tempbuf);
	if(fs) fclose(fs);
	return retcode;
}
Exemplo n.º 2
0
int loadppm(int *fd, unsigned char **buf, int *w, int *h,
	enum BMPPIXELFORMAT f, int align, int dstbottomup, int ascii)
{
	FILE *fs=NULL;  int retcode=0, scalefactor, dstpitch;
	unsigned char *tempbuf=NULL;  char temps[255], temps2[255];
	int numread=0, totalread=0, pixel[3], i, j;

	if((fs=fdopen(*fd, "r"))==NULL) _throw(strerror(errno));

	do
	{
		if(!fgets(temps, 255, fs)) _throw("Read error");
		if(strlen(temps)==0 || temps[0]=='\n') continue;
		if(sscanf(temps, "%s", temps2)==1 && temps2[1]=='#') continue;
		switch(totalread)
		{
			case 0:
				if((numread=sscanf(temps, "%d %d %d", w, h, &scalefactor))==EOF)
					_throw("Read error");
				break;
			case 1:
				if((numread=sscanf(temps, "%d %d", h, &scalefactor))==EOF)
					_throw("Read error");
				break;
			case 2:
				if((numread=sscanf(temps, "%d", &scalefactor))==EOF)
					_throw("Read error");
				break;
		}
		totalread+=numread;
	} while(totalread<3);
	if((*w)<1 || (*h)<1 || scalefactor<1) _throw("Corrupt PPM header");

	dstpitch=(((*w)*ps[f])+(align-1))&(~(align-1));
	if((*buf=(unsigned char *)malloc(dstpitch*(*h)))==NULL)
		_throw("Memory allocation error");
	if(ascii)
	{
		for(j=0; j<*h; j++)
		{
			for(i=0; i<*w; i++)
			{
				if(fscanf(fs, "%d%d%d", &pixel[0], &pixel[1], &pixel[2])!=3)
					_throw("Read error");
				(*buf)[j*dstpitch+i*ps[f]+roffset[f]]=(unsigned char)(pixel[0]*255/scalefactor);
				(*buf)[j*dstpitch+i*ps[f]+goffset[f]]=(unsigned char)(pixel[1]*255/scalefactor);
				(*buf)[j*dstpitch+i*ps[f]+boffset[f]]=(unsigned char)(pixel[2]*255/scalefactor);
			}
		}
	}
	else
	{
		if(scalefactor!=255)
			_throw("Binary PPMs must have 8-bit components");
		if((tempbuf=(unsigned char *)malloc((*w)*(*h)*3))==NULL)
			_throw("Memory allocation error");
		if(fread(tempbuf, (*w)*(*h)*3, 1, fs)!=1) _throw("Read error");
		pixelconvert(tempbuf, BMP_RGB, (*w)*3, *buf, f, dstpitch, *w, *h, dstbottomup);
	}

	finally:
	if(fs) {fclose(fs);  *fd=-1;}
	if(tempbuf) free(tempbuf);
	return retcode;
}
Exemplo n.º 3
0
int savebmp(char *filename, unsigned char *buf, int w, int h,
	enum BMPPIXELFORMAT f, int srcpitch, int srcbottomup)
{
	int fd=-1, byteswritten, dstpitch, retcode=0;
	int flags=O_RDWR|O_CREAT|O_TRUNC;
	unsigned char *tempbuf=NULL;  char *temp;
	bmphdr bh;  int mode;

	#ifdef _WIN32
	flags|=O_BINARY;  mode=_S_IREAD|_S_IWRITE;
	#else
	mode=S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;
	#endif
	if(!filename || !buf || w<1 || h<1 || f<0 || f>BMPPIXELFORMATS-1 || srcpitch<0)
		_throw("bad argument to savebmp()");

	if(srcpitch==0) srcpitch=w*ps[f];

	if((temp=strrchr(filename, '.'))!=NULL)
	{
		if(!stricmp(temp, ".ppm"))
			return saveppm(filename, buf, w, h, f, srcpitch, srcbottomup);
	}

	_unix(fd=open(filename, flags, mode));
	dstpitch=((w*3)+3)&(~3);

	bh.bfType=0x4d42;
	bh.bfSize=BMPHDRSIZE+dstpitch*h;
	bh.bfReserved1=0;  bh.bfReserved2=0;
	bh.bfOffBits=BMPHDRSIZE;
	bh.biSize=40;
	bh.biWidth=w;  bh.biHeight=h;
	bh.biPlanes=0;  bh.biBitCount=24;
	bh.biCompression=BI_RGB;  bh.biSizeImage=0;
	bh.biXPelsPerMeter=0;  bh.biYPelsPerMeter=0;
	bh.biClrUsed=0;  bh.biClrImportant=0;

	if(!littleendian())
	{
		bh.bfType=byteswap16(bh.bfType);
		bh.bfSize=byteswap(bh.bfSize);
		bh.bfOffBits=byteswap(bh.bfOffBits);
		bh.biSize=byteswap(bh.biSize);
		bh.biWidth=byteswap(bh.biWidth);
		bh.biHeight=byteswap(bh.biHeight);
		bh.biPlanes=byteswap16(bh.biPlanes);
		bh.biBitCount=byteswap16(bh.biBitCount);
		bh.biCompression=byteswap(bh.biCompression);
		bh.biSizeImage=byteswap(bh.biSizeImage);
		bh.biXPelsPerMeter=byteswap(bh.biXPelsPerMeter);
		bh.biYPelsPerMeter=byteswap(bh.biYPelsPerMeter);
		bh.biClrUsed=byteswap(bh.biClrUsed);
		bh.biClrImportant=byteswap(bh.biClrImportant);
	}

	writeme(fd, &bh.bfType, sizeof(unsigned short));
	writeme(fd, &bh.bfSize, sizeof(unsigned int));
	writeme(fd, &bh.bfReserved1, sizeof(unsigned short));
	writeme(fd, &bh.bfReserved2, sizeof(unsigned short));
	writeme(fd, &bh.bfOffBits, sizeof(unsigned int));
	writeme(fd, &bh.biSize, sizeof(unsigned int));
	writeme(fd, &bh.biWidth, sizeof(int));
	writeme(fd, &bh.biHeight, sizeof(int));
	writeme(fd, &bh.biPlanes, sizeof(unsigned short));
	writeme(fd, &bh.biBitCount, sizeof(unsigned short));
	writeme(fd, &bh.biCompression, sizeof(unsigned int));
	writeme(fd, &bh.biSizeImage, sizeof(unsigned int));
	writeme(fd, &bh.biXPelsPerMeter, sizeof(int));
	writeme(fd, &bh.biYPelsPerMeter, sizeof(int));
	writeme(fd, &bh.biClrUsed, sizeof(unsigned int));
	writeme(fd, &bh.biClrImportant, sizeof(unsigned int));

	if((tempbuf=(unsigned char *)malloc(dstpitch*h))==NULL)
		_throw("Memory allocation error");

	pixelconvert(buf, f, srcpitch, tempbuf, BMP_BGR, dstpitch, w, h, 
		!srcbottomup);

	if((byteswritten=write(fd, tempbuf, dstpitch*h))!=dstpitch*h)
		_throw(strerror(errno));

	finally:
	if(tempbuf) free(tempbuf);
	if(fd!=-1) close(fd);
	return retcode;
}
Exemplo n.º 4
0
int loadbmp(char *filename, unsigned char **buf, int *w, int *h, 
	enum BMPPIXELFORMAT f, int align, int dstbottomup)
{
	int fd=-1, bytesread, srcpitch, srcbottomup=1, srcps, dstpitch,
		retcode=0;
	unsigned char *tempbuf=NULL;
	bmphdr bh;  int flags=O_RDONLY;

	dstbottomup=dstbottomup? 1:0;
	#ifdef _WIN32
	flags|=O_BINARY;
	#endif
	if(!filename || !buf || !w || !h || f<0 || f>BMPPIXELFORMATS-1 || align<1)
		_throw("invalid argument to loadbmp()");
	if((align&(align-1))!=0)
		_throw("Alignment must be a power of 2");
	_unix(fd=open(filename, flags));

	readme(fd, &bh.bfType, sizeof(unsigned short));
	if(!littleendian())	bh.bfType=byteswap16(bh.bfType);

	if(bh.bfType==0x3650)
	{
		_catch(loadppm(&fd, buf, w, h, f, align, dstbottomup, 0));
		goto finally;
	}
	if(bh.bfType==0x3350)
	{
		_catch(loadppm(&fd, buf, w, h, f, align, dstbottomup, 1));
		goto finally;
	}

	readme(fd, &bh.bfSize, sizeof(unsigned int));
	readme(fd, &bh.bfReserved1, sizeof(unsigned short));
	readme(fd, &bh.bfReserved2, sizeof(unsigned short));
	readme(fd, &bh.bfOffBits, sizeof(unsigned int));
	readme(fd, &bh.biSize, sizeof(unsigned int));
	readme(fd, &bh.biWidth, sizeof(int));
	readme(fd, &bh.biHeight, sizeof(int));
	readme(fd, &bh.biPlanes, sizeof(unsigned short));
	readme(fd, &bh.biBitCount, sizeof(unsigned short));
	readme(fd, &bh.biCompression, sizeof(unsigned int));
	readme(fd, &bh.biSizeImage, sizeof(unsigned int));
	readme(fd, &bh.biXPelsPerMeter, sizeof(int));
	readme(fd, &bh.biYPelsPerMeter, sizeof(int));
	readme(fd, &bh.biClrUsed, sizeof(unsigned int));
	readme(fd, &bh.biClrImportant, sizeof(unsigned int));

	if(!littleendian())
	{
		bh.bfSize=byteswap(bh.bfSize);
		bh.bfOffBits=byteswap(bh.bfOffBits);
		bh.biSize=byteswap(bh.biSize);
		bh.biWidth=byteswap(bh.biWidth);
		bh.biHeight=byteswap(bh.biHeight);
		bh.biPlanes=byteswap16(bh.biPlanes);
		bh.biBitCount=byteswap16(bh.biBitCount);
		bh.biCompression=byteswap(bh.biCompression);
		bh.biSizeImage=byteswap(bh.biSizeImage);
		bh.biXPelsPerMeter=byteswap(bh.biXPelsPerMeter);
		bh.biYPelsPerMeter=byteswap(bh.biYPelsPerMeter);
		bh.biClrUsed=byteswap(bh.biClrUsed);
		bh.biClrImportant=byteswap(bh.biClrImportant);
	}

	if(bh.bfType!=0x4d42 || bh.bfOffBits<BMPHDRSIZE
	|| bh.biWidth<1 || bh.biHeight==0)
		_throw("Corrupt bitmap header");
	if((bh.biBitCount!=24 && bh.biBitCount!=32) || bh.biCompression!=BI_RGB)
		_throw("Only uncompessed RGB bitmaps are supported");

	*w=bh.biWidth;  *h=bh.biHeight;  srcps=bh.biBitCount/8;
	if(*h<0) {*h=-(*h);  srcbottomup=0;}
	srcpitch=(((*w)*srcps)+3)&(~3);
	dstpitch=(((*w)*ps[f])+(align-1))&(~(align-1));

	if(srcpitch*(*h)+bh.bfOffBits!=bh.bfSize) _throw("Corrupt bitmap header");
	if((tempbuf=(unsigned char *)malloc(srcpitch*(*h)))==NULL
	|| (*buf=(unsigned char *)malloc(dstpitch*(*h)))==NULL)
		_throw("Memory allocation error");
	if(lseek(fd, (long)bh.bfOffBits, SEEK_SET)!=(long)bh.bfOffBits)
		_throw(strerror(errno));
	_unix(bytesread=read(fd, tempbuf, srcpitch*(*h)));
	if(bytesread!=srcpitch*(*h)) _throw("Read error");

	pixelconvert(tempbuf, BMP_BGR, srcpitch, *buf, f, dstpitch, *w, *h, 
		srcbottomup!=dstbottomup);

	finally:
	if(tempbuf) free(tempbuf);
	if(fd!=-1) close(fd);
	return retcode;
}
Exemplo n.º 5
0
int savebmp(char *filename, unsigned char *buf, int w, int h, int srcpf,
	int bottomup)
{
	int retval=0, srcps, dstpf;
	struct jpeg_decompress_struct dinfo;
	struct my_error_mgr jerr;
	djpeg_dest_ptr dst;
	FILE *file=NULL;
	char *ptr=NULL;

	if(!filename || !buf || w<1 || h<1 || srcpf<0 || srcpf>=TJ_NUMPF)
		_throw("savebmp(): Invalid argument");

	if((file=fopen(filename, "wb"))==NULL)
		_throwunix("savebmp(): Cannot open output file");

	dinfo.err=jpeg_std_error(&jerr.pub);
	jerr.pub.error_exit=my_error_exit;
	jerr.pub.output_message=my_output_message;

	if(setjmp(jerr.setjmp_buffer))
	{
		/* If we get here, the JPEG code has signaled an error. */
		retval=-1;  goto bailout;
	}

	jpeg_create_decompress(&dinfo);
	if(srcpf==TJPF_GRAY)
	{
		dinfo.out_color_components=dinfo.output_components=1;
		dinfo.out_color_space=JCS_GRAYSCALE;
	}
	else
	{
		dinfo.out_color_components=dinfo.output_components=3;
		dinfo.out_color_space=JCS_RGB;
	}
	dinfo.image_width=w;  dinfo.image_height=h;
	dinfo.global_state=DSTATE_READY;
	dinfo.scale_num=dinfo.scale_denom=1;

	ptr=strrchr(filename, '.');
	if(ptr && !strcasecmp(ptr, ".bmp"))
	{
		if((dst=jinit_write_bmp(&dinfo, 0))==NULL)
			_throw("savebmp(): Could not initialize bitmap writer");
	}
	else
	{
		if((dst=jinit_write_ppm(&dinfo))==NULL)
			_throw("savebmp(): Could not initialize PPM writer");
	}

  dst->output_file=file;
	(*dst->start_output)(&dinfo, dst);
	(*dinfo.mem->realize_virt_arrays)((j_common_ptr)&dinfo);

	if(srcpf==TJPF_GRAY) dstpf=srcpf;
	else dstpf=TJPF_RGB;
	srcps=tjPixelSize[srcpf];

	while(dinfo.output_scanline<dinfo.output_height)
	{
		int i, nlines=dst->buffer_height;
		for(i=0; i<nlines; i++)
		{
			unsigned char *inbuf;  int row;
			row=dinfo.output_scanline+i;
			if(bottomup) inbuf=&buf[(h-row-1)*w*srcps];
			else inbuf=&buf[row*w*srcps];
			pixelconvert(inbuf, srcpf, bottomup, dst->buffer[i], dstpf, 0, w,
				nlines);
		}
		(*dst->put_pixel_rows)(&dinfo, dst, nlines);
		dinfo.output_scanline+=nlines;
  }

	(*dst->finish_output)(&dinfo, dst);

	bailout:
	jpeg_destroy_decompress(&dinfo);
	if(file) fclose(file);
	return retval;
}
Exemplo n.º 6
0
int loadbmp(char *filename, unsigned char **buf, int *w, int *h, 
	int dstpf, int bottomup)
{
	int retval=0, dstps, srcpf, tempc;
	struct jpeg_compress_struct cinfo;
	struct my_error_mgr jerr;
	cjpeg_source_ptr src;
	FILE *file=NULL;

	if(!filename || !buf || !w || !h || dstpf<0 || dstpf>=TJ_NUMPF)
		_throw("loadbmp(): Invalid argument");

	if((file=fopen(filename, "rb"))==NULL)
		_throwunix("loadbmp(): Cannot open input file");

	cinfo.err=jpeg_std_error(&jerr.pub);
	jerr.pub.error_exit=my_error_exit;
	jerr.pub.output_message=my_output_message;

	if(setjmp(jerr.setjmp_buffer))
	{
		/* If we get here, the JPEG code has signaled an error. */
		retval=-1;  goto bailout;
	}

	jpeg_create_compress(&cinfo);
	if((tempc=getc(file))<0 || ungetc(tempc, file)==EOF)
		_throwunix("loadbmp(): Could not read input file")
	else if(tempc==EOF) _throw("loadbmp(): Input file contains no data");

	if(tempc=='B')
	{
		if((src=jinit_read_bmp(&cinfo))==NULL)
			_throw("loadbmp(): Could not initialize bitmap loader");
	}
	else if(tempc=='P')
	{
		if((src=jinit_read_ppm(&cinfo))==NULL)
			_throw("loadbmp(): Could not initialize bitmap loader");
	}
	else _throw("loadbmp(): Unsupported file type");

	src->input_file=file;
	(*src->start_input)(&cinfo, src);
	(*cinfo.mem->realize_virt_arrays)((j_common_ptr)&cinfo);

	*w=cinfo.image_width;  *h=cinfo.image_height;

	if(cinfo.input_components==1 && cinfo.in_color_space==JCS_RGB)
		srcpf=TJPF_GRAY;
	else srcpf=TJPF_RGB;

	dstps=tjPixelSize[dstpf];
	if((*buf=(unsigned char *)malloc((*w)*(*h)*dstps))==NULL)
		_throw("loadbmp(): Memory allocation failure");

	while(cinfo.next_scanline<cinfo.image_height)
	{
		int i, nlines=(*src->get_pixel_rows)(&cinfo, src);
		for(i=0; i<nlines; i++)
		{
			unsigned char *outbuf;  int row;
			row=cinfo.next_scanline+i;
			if(bottomup) outbuf=&(*buf)[((*h)-row-1)*(*w)*dstps];
			else outbuf=&(*buf)[row*(*w)*dstps];
			pixelconvert(src->buffer[i], srcpf, 0, outbuf, dstpf, bottomup, *w,
				nlines);
		}
		cinfo.next_scanline+=nlines;
  }

	(*src->finish_input)(&cinfo, src);

	bailout:
	jpeg_destroy_compress(&cinfo);
	if(file) fclose(file);
	if(retval<0 && buf && *buf) {free(*buf);  *buf=NULL;}
	return retval;
}