First commit ~0,10
This commit is contained in:
264
G/UTIL/GIFHISTO.C
Normal file
264
G/UTIL/GIFHISTO.C
Normal file
@ -0,0 +1,264 @@
|
||||
/*****************************************************************************
|
||||
* "Gif-Lib" - Yet another gif library. *
|
||||
* *
|
||||
* Written by: Gershon Elber Ver 0.1, Jul. 1989 *
|
||||
******************************************************************************
|
||||
* Program to create histogram of the colors used by the given GIF file. *
|
||||
* Dumps out GIF file of constants size GIF_WIDTH by GIF_HEIGHT. *
|
||||
* Options: *
|
||||
* -q : quite printing mode. *
|
||||
* -t : Dump out text instead of GIF - #Colors lines, each with #appearances. *
|
||||
* -i W H : size of GIF image to generate. Colors of input GIF file are *
|
||||
* spread homogeneously along Height, which better by dividable by the *
|
||||
* number of colors in input image. *
|
||||
* -n n : select image number to generate histogram to (1 by default). *
|
||||
* -b : strip off background color count. *
|
||||
* -h : on line help *
|
||||
******************************************************************************
|
||||
* History: *
|
||||
* 8 Jul 89 - Version 1.0 by Gershon Elber. *
|
||||
*****************************************************************************/
|
||||
|
||||
#ifdef __MSDOS__
|
||||
#include <stdlib.h>
|
||||
#include <alloc.h>
|
||||
#endif /* __MSDOS__ */
|
||||
|
||||
#include <stdio.h>
|
||||
#include <ctype.h>
|
||||
#include <string.h>
|
||||
#include "gif_lib.h"
|
||||
#include "getarg.h"
|
||||
|
||||
#define PROGRAM_NAME "GifHisto"
|
||||
|
||||
#define DEFAULT_HISTO_WIDTH 100 /* Histogram image diemnsions. */
|
||||
#define DEFAULT_HISTO_HEIGHT 256
|
||||
#define HISTO_BITS_PER_PIXEL 2 /* Size of bitmap for histogram GIF. */
|
||||
|
||||
#ifdef __MSDOS__
|
||||
extern unsigned int
|
||||
_stklen = 16384; /* Increase default stack size. */
|
||||
#endif /* __MSDOS__ */
|
||||
|
||||
#ifdef SYSV
|
||||
static char *VersionStr =
|
||||
"Gif library module,\t\tGershon Elber\n\
|
||||
(C) Copyright 1989 Gershon Elber, Non commercial use only.\n";
|
||||
static char
|
||||
*CtrlStr = "GifHisto q%- t%- s%-Width|Height!d!d n%-ImageNumber!d b%- h%- GifFile!*s";
|
||||
#else
|
||||
static char
|
||||
*VersionStr =
|
||||
PROGRAM_NAME
|
||||
GIF_LIB_VERSION
|
||||
" Gershon Elber, "
|
||||
__DATE__ ", " __TIME__ "\n"
|
||||
"(C) Copyright 1989 Gershon Elber, Non commercial use only.\n";
|
||||
static char
|
||||
*CtrlStr =
|
||||
PROGRAM_NAME
|
||||
" q%- t%- s%-Width|Height!d!d n%-ImageNumber!d b%- h%- GifFile!*s";
|
||||
#endif /* SYSV */
|
||||
|
||||
static int
|
||||
ImageWidth = DEFAULT_HISTO_WIDTH,
|
||||
ImageHeight = DEFAULT_HISTO_HEIGHT,
|
||||
ImageN = 1;
|
||||
static GifColorType
|
||||
HistoColorMap[] = { /* Constant bit map for histograms: */
|
||||
{ 0, 0, 0 },
|
||||
{ 255, 0, 0 },
|
||||
{ 0, 255, 0 },
|
||||
{ 0, 0, 255 }
|
||||
};
|
||||
|
||||
static void QuitGifError(GifFileType *GifFileIn, GifFileType *GifFileOut);
|
||||
|
||||
/******************************************************************************
|
||||
* Interpret the command line and scan the given GIF file. *
|
||||
******************************************************************************/
|
||||
void main(int argc, char **argv)
|
||||
{
|
||||
int i, j, Size, Error, NumFiles, ExtCode, CodeSize, NumColors = 2, Color,
|
||||
Count, ImageNum = 0, TextFlag = FALSE, SizeFlag = FALSE,
|
||||
ImageNFlag = FALSE, BackGroundFlag = FALSE, HelpFlag = FALSE;
|
||||
long Scaler, Histogram[256];
|
||||
GifRecordType RecordType;
|
||||
GifByteType *Extension, *CodeBlock;
|
||||
char **FileName = NULL;
|
||||
GifRowType Line;
|
||||
GifFileType *GifFileIn = NULL, *GifFileOut = NULL;
|
||||
|
||||
/* Same image dimension vars for both Image & ImageN as only one allowed */
|
||||
if ((Error = GAGetArgs(argc, argv, CtrlStr, &GifQuitePrint,
|
||||
&TextFlag, &SizeFlag, &ImageWidth, &ImageHeight,
|
||||
&ImageNFlag, &ImageN, &BackGroundFlag,
|
||||
&HelpFlag, &NumFiles, &FileName)) != FALSE ||
|
||||
(NumFiles > 1 && !HelpFlag)) {
|
||||
if (Error)
|
||||
GAPrintErrMsg(Error);
|
||||
else if (NumFiles > 1)
|
||||
GIF_MESSAGE("Error in command line parsing - one GIF file please.");
|
||||
GAPrintHowTo(CtrlStr);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
if (HelpFlag) {
|
||||
fprintf(stderr, VersionStr);
|
||||
GAPrintHowTo(CtrlStr);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
if (NumFiles == 1) {
|
||||
if ((GifFileIn = DGifOpenFileName(*FileName)) == NULL)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
}
|
||||
else {
|
||||
/* Use the stdin instead: */
|
||||
if ((GifFileIn = DGifOpenFileHandle(0)) == NULL)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
}
|
||||
|
||||
for (i = 0; i < 256; i++) Histogram[i] = 0; /* Reset counters. */
|
||||
|
||||
/* Scan the content of the GIF file and load the image(s) in: */
|
||||
do {
|
||||
if (DGifGetRecordType(GifFileIn, &RecordType) == GIF_ERROR)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
|
||||
switch (RecordType) {
|
||||
case IMAGE_DESC_RECORD_TYPE:
|
||||
if (DGifGetImageDesc(GifFileIn) == GIF_ERROR)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
|
||||
if (GifFileIn -> IColorMap)
|
||||
NumColors = (1 << GifFileIn -> IBitsPerPixel);
|
||||
else if (GifFileIn -> SColorMap)
|
||||
NumColors = (1 << GifFileIn -> SBitsPerPixel);
|
||||
else
|
||||
GIF_EXIT("Neither Screen nor Image color map exists.");
|
||||
|
||||
if ((ImageHeight / NumColors) * NumColors != ImageHeight)
|
||||
GIF_EXIT("Image height specified not dividable by #colors.");
|
||||
|
||||
if (++ImageNum == ImageN) {
|
||||
/* This is the image we should make histogram for: */
|
||||
Line = (GifRowType) malloc(GifFileIn -> IWidth *
|
||||
sizeof(GifPixelType));
|
||||
GifQprintf("\n%s: Image %d at (%d, %d) [%dx%d]: ",
|
||||
PROGRAM_NAME, ImageNum,
|
||||
GifFileIn -> ILeft, GifFileIn -> ITop,
|
||||
GifFileIn -> IWidth, GifFileIn -> IHeight);
|
||||
|
||||
for (i = 0; i < GifFileIn -> IHeight; i++) {
|
||||
if (DGifGetLine(GifFileIn, Line, GifFileIn -> IWidth)
|
||||
== GIF_ERROR)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
for (j = 0; j < GifFileIn -> IWidth; j++)
|
||||
Histogram[Line[j]]++;
|
||||
GifQprintf("\b\b\b\b%-4d", i);
|
||||
}
|
||||
|
||||
free((char *) Line);
|
||||
}
|
||||
else {
|
||||
/* Skip the image: */
|
||||
/* Now read image itself in decoded form as we dont */
|
||||
/* really care what is there, and this is much faster. */
|
||||
if (DGifGetCode(GifFileIn, &CodeSize, &CodeBlock) == GIF_ERROR)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
while (CodeBlock != NULL)
|
||||
if (DGifGetCodeNext(GifFileIn, &CodeBlock) == GIF_ERROR)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
}
|
||||
break;
|
||||
case EXTENSION_RECORD_TYPE:
|
||||
/* Skip any extension blocks in file: */
|
||||
if (DGifGetExtension(GifFileIn, &ExtCode, &Extension) == GIF_ERROR)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
|
||||
while (Extension != NULL) {
|
||||
if (DGifGetExtensionNext(GifFileIn, &Extension) == GIF_ERROR)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
}
|
||||
break;
|
||||
case TERMINATE_RECORD_TYPE:
|
||||
break;
|
||||
default: /* Should be traps by DGifGetRecordType. */
|
||||
break;
|
||||
}
|
||||
}
|
||||
while (RecordType != TERMINATE_RECORD_TYPE);
|
||||
|
||||
/* We we requested to kill back ground count: */
|
||||
if (BackGroundFlag) Histogram[GifFileIn -> SBackGroundColor] = 0;
|
||||
|
||||
if (DGifCloseFile(GifFileIn) == GIF_ERROR)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
|
||||
|
||||
/* We may required to dump out the histogram as text file: */
|
||||
if (TextFlag) {
|
||||
for (i = 0; i < NumColors; i++)
|
||||
printf("%12ld %3d\n", Histogram[i], i);
|
||||
}
|
||||
else {
|
||||
/* Open stdout for the histogram output file: */
|
||||
if ((GifFileOut = EGifOpenFileHandle(1)) == NULL)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
|
||||
/* Dump out screen descriptor to fit histogram dimensions: */
|
||||
if (EGifPutScreenDesc(GifFileOut,
|
||||
ImageWidth, ImageHeight, HISTO_BITS_PER_PIXEL, 0,
|
||||
HISTO_BITS_PER_PIXEL, HistoColorMap) == GIF_ERROR)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
|
||||
/* Dump out image descriptor to fit histogram dimensions: */
|
||||
if (EGifPutImageDesc(GifFileOut,
|
||||
0, 0, ImageWidth, ImageHeight,
|
||||
FALSE, HISTO_BITS_PER_PIXEL, NULL) == GIF_ERROR)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
|
||||
/* Prepare scan line for histogram file, and find scaler to scale */
|
||||
/* histogram to be between 0 and ImageWidth: */
|
||||
Line = (GifRowType) malloc(ImageWidth * sizeof(GifPixelType));
|
||||
for (Scaler = 0, i = 0; i < NumColors; i++) if (Histogram[i] > Scaler)
|
||||
Scaler = Histogram[i];
|
||||
Scaler /= ImageWidth;
|
||||
if (Scaler == 0) Scaler = 1; /* In case maximum is less than width. */
|
||||
|
||||
/* Dump out the image itself: */
|
||||
for (Count = ImageHeight, i = 0, Color = 1; i < NumColors; i++) {
|
||||
if ((Size = Histogram[i] / Scaler) > ImageWidth) Size = ImageWidth;
|
||||
for (j = 0; j < Size; j++)
|
||||
Line[j] = Color;
|
||||
for (j = Size; j < ImageWidth; j++)
|
||||
Line[j] = GifFileOut -> SBackGroundColor;
|
||||
|
||||
/* Move to next color: */
|
||||
if (++Color >= (1 << HISTO_BITS_PER_PIXEL)) Color = 1;
|
||||
|
||||
/* Dump this histogram entry as many times as required: */
|
||||
for (j = 0; j < ImageHeight / NumColors; j++) {
|
||||
if (EGifPutLine(GifFileOut, Line, ImageWidth) == GIF_ERROR)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
GifQprintf("\b\b\b\b%-4d", Count--);
|
||||
}
|
||||
}
|
||||
|
||||
if (EGifCloseFile(GifFileOut) == GIF_ERROR)
|
||||
QuitGifError(GifFileIn, GifFileOut);
|
||||
}
|
||||
}
|
||||
|
||||
/******************************************************************************
|
||||
* Close both input and output file (if open), and exit. *
|
||||
******************************************************************************/
|
||||
static void QuitGifError(GifFileType *GifFileIn, GifFileType *GifFileOut)
|
||||
{
|
||||
PrintGifError();
|
||||
if (GifFileIn != NULL) DGifCloseFile(GifFileIn);
|
||||
if (GifFileOut != NULL) EGifCloseFile(GifFileOut);
|
||||
exit(1);
|
||||
}
|
||||
Reference in New Issue
Block a user