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G/UTIL/GIF2IRIS.C
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283
G/UTIL/GIF2IRIS.C
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/*****************************************************************************
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* "Gif-Lib" - Yet another gif library. *
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* *
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* Written by: Gershon Elber UNIX Ver 0.1, Jul. 1989 *
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******************************************************************************
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* Program to display GIF file under X11 window system. *
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* Options: *
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* -q : quite printing mode. *
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* -f : force the process to be in foreground. *
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* -p PosX PosY : defines the position where to put the image. *
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* -h : on line help. *
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******************************************************************************
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* History: *
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* 13 mar 90 - Version 1.0 by Gershon Elber. *
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*****************************************************************************/
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#ifdef __MSDOS__
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#include <graphics.h>
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#include <stdlib.h>
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#include <alloc.h>
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#include <io.h>
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#include <dos.h>
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#include <bios.h>
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#endif /* __MSDOS__ */
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#include "gl.h"
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#include "device.h"
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <fcntl.h>
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#include "gif_lib.h"
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#include "getarg.h"
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#define PROGRAM_NAME "Gif2Iris"
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#define ABS(x) ((x) > 0 ? (x) : (-(x)))
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#ifdef __MSDOS__
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extern unsigned int
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_stklen = 16384; /* Increase default stack size. */
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#endif /* __MSDOS__ */
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#ifdef SYSV
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static char *VersionStr =
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"Gif library module,\t\tGershon Elber\n\
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(C) Copyright 1989 Gershon Elber, Non commercial use only.\n";
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static char
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*CtrlStr = "Gif2Iris q%- f%- p%-PosX|PosY!d!d h%- GifFile!*s";
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#else
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static char
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*VersionStr =
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PROGRAM_NAME
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GIF_LIB_VERSION
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" Gershon Elber, "
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__DATE__ ", " __TIME__ "\n"
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"(C) Copyright 1989 Gershon Elber, Non commercial use only.\n";
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static char
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*CtrlStr =
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PROGRAM_NAME
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" q%- f%- p%-PosX|PosY!d!d h%- GifFile!*s";
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#endif /* SYSV */
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/* Make some variables global, so we could access them faster: */
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static int
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PosFlag = FALSE,
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HelpFlag = FALSE,
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ForeGroundFlag = FALSE,
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ColorMapSize = 0,
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BackGround = 0,
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IrisPosX = 0,
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IrisPosY = 0,
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InterlacedOffset[] = { 0, 4, 2, 1 }, /* The way Interlaced image should. */
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InterlacedJumps[] = { 8, 8, 4, 2 }; /* be read - offsets and jumps... */
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static GifColorType
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*ColorMap;
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static void Screen2Iris(GifRowType *ScreenBuffer,
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int ScreenWidth, int ScreenHeight);
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/******************************************************************************
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* Interpret the command line and scan the given GIF file. *
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******************************************************************************/
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void main(int argc, char **argv)
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{
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int i, j, Error, NumFiles, ImageNum = 0, Size, Row, Col, Width, Height,
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ExtCode, Count;
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GifRecordType RecordType;
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GifByteType *Extension;
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char **FileName = NULL;
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GifRowType *ScreenBuffer;
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GifFileType *GifFile;
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if ((Error = GAGetArgs(argc, argv, CtrlStr,
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&GifQuitePrint, &ForeGroundFlag,
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&PosFlag, &IrisPosX, &IrisPosY,
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&HelpFlag, &NumFiles, &FileName)) != FALSE ||
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(NumFiles > 1 && !HelpFlag)) {
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if (Error)
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GAPrintErrMsg(Error);
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else if (NumFiles > 1)
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GIF_MESSAGE("Error in command line parsing - one GIF file please.");
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GAPrintHowTo(CtrlStr);
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exit(1);
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}
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if (HelpFlag) {
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fprintf(stderr, VersionStr);
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GAPrintHowTo(CtrlStr);
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exit(0);
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}
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if (NumFiles == 1) {
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if ((GifFile = DGifOpenFileName(*FileName)) == NULL) {
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PrintGifError();
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exit(-1);
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}
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}
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else {
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/* Use the stdin instead: */
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#ifdef __MSDOS__
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setmode(0, O_BINARY);
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#endif /* __MSDOS__ */
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if ((GifFile = DGifOpenFileHandle(0)) == NULL) {
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PrintGifError();
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exit(-1);
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}
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}
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/* Allocate the screen as vector of column of rows. We cannt allocate */
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/* the all screen at once, as this broken minded CPU can allocate up to */
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/* 64k at a time and our image can be bigger than that: */
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/* Note this screen is device independent - its the screen as defined by */
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/* the GIF file parameters itself. */
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if ((ScreenBuffer = (GifRowType *)
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malloc(GifFile -> SHeight * sizeof(GifRowType *))) == NULL)
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GIF_EXIT("Failed to allocate memory required, aborted.");
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Size = GifFile -> SWidth * sizeof(GifPixelType);/* Size in bytes one row.*/
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if ((ScreenBuffer[0] = (GifRowType) malloc(Size)) == NULL) /* First row. */
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GIF_EXIT("Failed to allocate memory required, aborted.");
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for (i = 0; i < GifFile -> SWidth; i++) /* Set its color to BackGround. */
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ScreenBuffer[0][i] = GifFile -> SBackGroundColor;
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for (i = 1; i < GifFile -> SHeight; i++) {
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/* Allocate the other rows, and set their color to background too: */
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if ((ScreenBuffer[i] = (GifRowType) malloc(Size)) == NULL)
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GIF_EXIT("Failed to allocate memory required, aborted.");
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memcpy(ScreenBuffer[i], ScreenBuffer[0], Size);
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}
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/* Scan the content of the GIF file and load the image(s) in: */
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do {
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if (DGifGetRecordType(GifFile, &RecordType) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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switch (RecordType) {
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case IMAGE_DESC_RECORD_TYPE:
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if (DGifGetImageDesc(GifFile) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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Row = GifFile -> ITop; /* Image Position relative to Screen. */
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Col = GifFile -> ILeft;
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Width = GifFile -> IWidth;
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Height = GifFile -> IHeight;
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GifQprintf("\n%s: Image %d at (%d, %d) [%dx%d]: ",
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PROGRAM_NAME, ++ImageNum, Col, Row, Width, Height);
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if (GifFile -> ILeft + GifFile -> IWidth > GifFile -> SWidth ||
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GifFile -> ITop + GifFile -> IHeight > GifFile -> SHeight) {
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fprintf(stderr, "Image %d is not confined to screen dimension, aborted.\n");
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exit(-2);
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}
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if (GifFile -> IInterlace) {
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/* Need to perform 4 passes on the images: */
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for (Count = i = 0; i < 4; i++)
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for (j = Row + InterlacedOffset[i]; j < Row + Height;
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j += InterlacedJumps[i]) {
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GifQprintf("\b\b\b\b%-4d", Count++);
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if (DGifGetLine(GifFile, &ScreenBuffer[j][Col],
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Width) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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}
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}
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else {
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for (i = 0; i < Height; i++) {
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GifQprintf("\b\b\b\b%-4d", i);
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if (DGifGetLine(GifFile, &ScreenBuffer[Row++][Col],
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Width) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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}
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}
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break;
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case EXTENSION_RECORD_TYPE:
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/* Skip any extension blocks in file: */
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if (DGifGetExtension(GifFile, &ExtCode, &Extension) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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while (Extension != NULL) {
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if (DGifGetExtensionNext(GifFile, &Extension) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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}
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break;
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case TERMINATE_RECORD_TYPE:
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break;
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default: /* Should be traps by DGifGetRecordType. */
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break;
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}
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}
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while (RecordType != TERMINATE_RECORD_TYPE);
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/* Lets display it - set the global variables required and do it: */
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BackGround = GifFile -> SBackGroundColor;
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ColorMap = (GifFile -> IColorMap ? GifFile -> IColorMap :
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GifFile -> SColorMap);
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ColorMapSize = 1 << (GifFile -> IColorMap ? GifFile -> IBitsPerPixel :
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GifFile -> SBitsPerPixel);
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GifQprintf("\n");
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Screen2Iris(ScreenBuffer, GifFile -> SWidth, GifFile -> SHeight);
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if (DGifCloseFile(GifFile) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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}
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/******************************************************************************
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* The real display routine. *
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******************************************************************************/
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static void Screen2Iris(GifRowType *ScreenBuffer,
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int ScreenWidth, int ScreenHeight)
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{
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short Val;
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int i, j;
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unsigned long *IrisScreenBuffer, *PBuffer;
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if (ScreenWidth > XMAXSCREEN + 1 ||
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ScreenHeight > YMAXSCREEN + 1)
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GIF_EXIT("Input image is too big.");
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if (PosFlag)
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prefposition(IrisPosX, IrisPosX + ScreenWidth - 1,
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IrisPosY, IrisPosY + ScreenHeight - 1);
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else
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prefsize(ScreenWidth, ScreenHeight);
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if (ForeGroundFlag)
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foreground();
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winopen(PROGRAM_NAME);
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RGBmode();
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gconfig();
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if ((IrisScreenBuffer = (unsigned long *)
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malloc(ScreenWidth * ScreenHeight * sizeof(unsigned long))) == NULL)
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GIF_EXIT("Failed to allocate memory required, aborted.");
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PBuffer = IrisScreenBuffer;
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for (i = ScreenHeight - 1; i >= 0; i--)
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for (j = 0; j < ScreenWidth; j++)
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*PBuffer++ = ColorMap[ScreenBuffer[i][j]].Red +
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(ColorMap[ScreenBuffer[i][j]].Green << 8) +
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(ColorMap[ScreenBuffer[i][j]].Blue << 16);
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reshapeviewport();
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lrectwrite(0, 0, ScreenWidth - 1, ScreenHeight - 1, IrisScreenBuffer);
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while (TRUE) {
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if (qread(&Val) == REDRAW) {
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reshapeviewport();
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lrectwrite(0, 0, ScreenWidth - 1, ScreenHeight - 1,
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IrisScreenBuffer);
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}
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}
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}
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