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/*****************************************************************************
gifcolor - generate color test-pattern GIFs
*****************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdbool.h>
#include "gif_lib.h"
#include "getarg.h"
#define PROGRAM_NAME "gifcolor"
#define LINE_LEN 40
#define IMAGEWIDTH LINE_LEN*GIF_FONT_WIDTH
static char
*VersionStr =
PROGRAM_NAME
VERSION_COOKIE
" Gershon Elber, "
__DATE__ ", " __TIME__ "\n"
"(C) Copyright 1989 Gershon Elber.\n";
static char
*CtrlStr = PROGRAM_NAME " v%- b%-Background!d h%-";
static int BackGround = 0;
static void QuitGifError(GifFileType *GifFile);
static void GenRasterTextLine(GifRowType *RasterBuffer, char *TextLine,
int BufferWidth, int ForeGroundIndex);
/******************************************************************************
Interpret the command line and generate the given GIF file.
******************************************************************************/
int main(int argc, char **argv)
{
int i, j, l, GifNoisyPrint, ColorMapSize, ErrorCode;
bool Error, BackGroundFlag = false, HelpFlag = false;
char Line[LINE_LEN];
GifRowType RasterBuffer[GIF_FONT_HEIGHT];
ColorMapObject *ColorMap;
GifFileType *GifFile;
GifColorType ScratchMap[256];
int red, green, blue;
if ((Error = GAGetArgs(argc, argv, CtrlStr,
&GifNoisyPrint,
&BackGroundFlag, &BackGround,
&HelpFlag)) != false) {
GAPrintErrMsg(Error);
GAPrintHowTo(CtrlStr);
exit(EXIT_FAILURE);
}
if (HelpFlag) {
(void)fprintf(stderr, VersionStr, GIFLIB_MAJOR, GIFLIB_MINOR);
GAPrintHowTo(CtrlStr);
exit(EXIT_SUCCESS);
}
/* Allocate the raster buffer for GIF_FONT_HEIGHT scan lines. */
for (i = 0; i < GIF_FONT_HEIGHT; i++)
{
if ((RasterBuffer[i] = (GifRowType) malloc(sizeof(GifPixelType) *
IMAGEWIDTH)) == NULL)
GIF_EXIT("Failed to allocate memory required, aborted.");
}
/* Open stdout for the output file: */
if ((GifFile = EGifOpenFileHandle(1, &ErrorCode)) == NULL) {
PrintGifError(ErrorCode);
exit(EXIT_FAILURE);
}
/* Read the color map in ColorFile into this color map: */
ColorMapSize = 0;
while (fscanf(stdin,
"%*3d %3d %3d %3d\n",
&red, &green, &blue) == 3) {
ScratchMap[ColorMapSize].Red = red;
ScratchMap[ColorMapSize].Green = green;
ScratchMap[ColorMapSize].Blue = blue;
ColorMapSize++;
}
if ((ColorMap = GifMakeMapObject(1 << GifBitSize(ColorMapSize), ScratchMap)) == NULL)
GIF_EXIT("Failed to allocate memory required, aborted.");
if (EGifPutScreenDesc(GifFile,
IMAGEWIDTH, ColorMapSize * GIF_FONT_HEIGHT,
GifBitSize(ColorMapSize),
BackGround, ColorMap) == GIF_ERROR)
QuitGifError(GifFile);
/* Dump out the image descriptor: */
if (EGifPutImageDesc(GifFile,
0, 0, IMAGEWIDTH, ColorMapSize * GIF_FONT_HEIGHT, false, NULL) == GIF_ERROR)
QuitGifError(GifFile);
GifQprintf("\n%s: Image 1 at (%d, %d) [%dx%d]: ",
PROGRAM_NAME, GifFile->Image.Left, GifFile->Image.Top,
GifFile->Image.Width, GifFile->Image.Height);
for (i = l = 0; i < ColorMap->ColorCount; i++) {
(void)snprintf(Line, sizeof(Line),
"Color %-3d: [%-3d, %-3d, %-3d] ", i,
ColorMap->Colors[i].Red,
ColorMap->Colors[i].Green,
ColorMap->Colors[i].Blue);
GenRasterTextLine(RasterBuffer, Line, IMAGEWIDTH, i);
for (j = 0; j < GIF_FONT_HEIGHT; j++) {
if (EGifPutLine(GifFile, RasterBuffer[j], IMAGEWIDTH) == GIF_ERROR)
QuitGifError(GifFile);
GifQprintf("\b\b\b\b%-4d", l++);
}
}
if (EGifCloseFile(GifFile, &ErrorCode) == GIF_ERROR)
{
PrintGifError(ErrorCode);
exit(EXIT_FAILURE);
}
return 0;
}
/******************************************************************************
Close output file (if open), and exit.
******************************************************************************/
static void GenRasterTextLine(GifRowType *RasterBuffer, char *TextLine,
int BufferWidth, int ForeGroundIndex)
{
unsigned char c;
unsigned char Byte, Mask;
int i, j, k, CharPosX, Len = strlen(TextLine);
for (i = 0; i < BufferWidth; i++)
for (j = 0; j < GIF_FONT_HEIGHT; j++) RasterBuffer[j][i] = BackGround;
for (i = CharPosX = 0; i < Len; i++, CharPosX += GIF_FONT_WIDTH) {
c = TextLine[i];
for (j = 0; j < GIF_FONT_HEIGHT; j++) {
Byte = GifAsciiTable8x8[(unsigned short)c][j];
for (k = 0, Mask = 128; k < GIF_FONT_WIDTH; k++, Mask >>= 1)
if (Byte & Mask)
RasterBuffer[j][CharPosX + k] = ForeGroundIndex;
}
}
}
/******************************************************************************
Close output file (if open), and exit.
******************************************************************************/
static void QuitGifError(GifFileType *GifFile)
{
if (GifFile != NULL) {
PrintGifError(GifFile->Error);
EGifCloseFile(GifFile, NULL);
}
exit(EXIT_FAILURE);
}
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