Include low-level unit tests borrowed from VirtualGL

git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@36 632fc199-4ca6-4c93-a231-07263d6284db

1 files changed, 370 insertions, 0 deletions

diff --git a/bmp.c b/bmp.c
new file mode 100644
index 0000000..3ccc877
--- /dev/null
+++ b/bmp.c
@@ -0,0 +1,370 @@
+/* Copyright (C)2004 Landmark Graphics Corporation
+ * Copyright (C)2005 Sun Microsystems, Inc.
+ *
+ * This library is free software and may be redistributed and/or modified under
+ * the terms of the wxWindows Library License, Version 3.1 or (at your option)
+ * any later version.  The full license is in the LICENSE.txt file included
+ * with this distribution.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * wxWindows Library License for more details.
+*/
+
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#ifdef _WIN32
+ #include <io.h>
+#else
+ #include <unistd.h>
+#endif
+#include "./rrutil.h"
+#include "./bmp.h"
+
+#ifndef BI_BITFIELDS
+#define BI_BITFIELDS 3L
+#endif
+#ifndef BI_RGB
+#define BI_RGB 0L
+#endif
+
+#define BMPHDRSIZE 54
+typedef struct _bmphdr
+{
+	unsigned short bfType;
+	unsigned int bfSize;
+	unsigned short bfReserved1, bfReserved2;
+	unsigned int bfOffBits;
+
+	unsigned int biSize;
+	int biWidth, biHeight;
+	unsigned short biPlanes, biBitCount;
+	unsigned int biCompression, biSizeImage;
+	int biXPelsPerMeter, biYPelsPerMeter;
+	unsigned int biClrUsed, biClrImportant;
+} bmphdr;
+
+static const char *__bmperr="No error";
+
+static const int ps[BMPPIXELFORMATS]={3, 4, 3, 4, 4, 4};
+static const int roffset[BMPPIXELFORMATS]={0, 0, 2, 2, 3, 1};
+static const int goffset[BMPPIXELFORMATS]={1, 1, 1, 1, 2, 2};
+static const int boffset[BMPPIXELFORMATS]={2, 2, 0, 0, 1, 3};
+
+#define _throw(m) {__bmperr=m;  retcode=-1;  goto finally;}
+#define _unix(f) {if((f)==-1) _throw(strerror(errno));}
+#define _catch(f) {if((f)==-1) {retcode=-1;  goto finally;}}
+
+#define readme(fd, addr, size) \
+	if((bytesread=read(fd, addr, (size)))==-1) _throw(strerror(errno)); \
+	if(bytesread!=(size)) _throw("Read error");
+
+void pixelconvert(unsigned char *srcbuf, enum BMPPIXELFORMAT srcformat,
+	int srcpitch, unsigned char *dstbuf, enum BMPPIXELFORMAT dstformat, int dstpitch,
+	int w, int h, int flip)
+{
+	unsigned char *srcptr, *srcptr0, *dstptr, *dstptr0;
+	int i, j;
+
+	srcptr=flip? &srcbuf[srcpitch*(h-1)]:srcbuf;
+	for(j=0, dstptr=dstbuf; j<h; j++,
+		srcptr+=flip? -srcpitch:srcpitch, dstptr+=dstpitch)
+	{
+		for(i=0, srcptr0=srcptr, dstptr0=dstptr; i<w; i++,
+			srcptr0+=ps[srcformat], dstptr0+=ps[dstformat])
+		{
+			dstptr0[roffset[dstformat]]=srcptr0[roffset[srcformat]];
+			dstptr0[goffset[dstformat]]=srcptr0[goffset[srcformat]];
+			dstptr0[boffset[dstformat]]=srcptr0[boffset[srcformat]];
+		}
+	}
+}
+
+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;
+}
+
+
+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;
+}
+
+#define writeme(fd, addr, size) \
+	if((byteswritten=write(fd, addr, (size)))==-1) _throw(strerror(errno)); \
+	if(byteswritten!=(size)) _throw("Write error");
+
+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;
+}
+
+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;
+}
+
+const char *bmpgeterr(void)
+{
+	return __bmperr;
+}