mirror of
https://github.com/aseprite/aseprite.git
synced 2025-01-14 03:40:55 +00:00
295 lines
8.8 KiB
C
295 lines
8.8 KiB
C
/*****************************************************************************
|
|
* "Gif-Lib" - Yet another gif library. *
|
|
* *
|
|
* Written by: Gershon Elber UNIX Ver 0.1, Jul. 1989 *
|
|
******************************************************************************
|
|
* Program to display GIF file under X11 window system. *
|
|
* Options: *
|
|
* -q : quiet printing mode. *
|
|
* -f : force the process to be in foreground. *
|
|
* -p PosX PosY : defines the position where to put the image. *
|
|
* -h : on-line help. *
|
|
******************************************************************************
|
|
* History: *
|
|
* 13 mar 90 - Version 1.0 by Gershon Elber. *
|
|
*****************************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#ifdef __MSDOS__
|
|
#include <graphics.h>
|
|
#include <alloc.h>
|
|
#include <io.h>
|
|
#include <dos.h>
|
|
#include <bios.h>
|
|
#endif /* __MSDOS__ */
|
|
|
|
#include "gl.h"
|
|
#include "device.h"
|
|
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
#include <string.h>
|
|
#ifdef HAVE_FCNTL_H
|
|
#include <fcntl.h>
|
|
#endif /* HAVE_FCNTL_H */
|
|
#include "gif_lib.h"
|
|
#include "getarg.h"
|
|
|
|
#define PROGRAM_NAME "Gif2Iris"
|
|
|
|
#define ABS(x) ((x) > 0 ? (x) : (-(x)))
|
|
|
|
#ifdef __MSDOS__
|
|
extern unsigned int
|
|
_stklen = 16384; /* Increase default stack size. */
|
|
#endif /* __MSDOS__ */
|
|
#ifdef SYSV
|
|
static char *VersionStr =
|
|
"Gif toolkit module,\t\tGershon Elber\n\
|
|
(C) Copyright 1989 Gershon Elber.\n";
|
|
static char
|
|
*CtrlStr = "Gif2Iris q%- f%- p%-PosX|PosY!d!d h%- GifFile!*s";
|
|
#else
|
|
static char
|
|
*VersionStr =
|
|
PROGRAM_NAME
|
|
GIF_LIB_VERSION
|
|
" Gershon Elber, "
|
|
__DATE__ ", " __TIME__ "\n"
|
|
"(C) Copyright 1989 Gershon Elber.\n";
|
|
static char
|
|
*CtrlStr =
|
|
PROGRAM_NAME
|
|
" q%- f%- p%-PosX|PosY!d!d h%- GifFile!*s";
|
|
#endif /* SYSV */
|
|
|
|
/* Make some variables global, so we could access them faster: */
|
|
static int
|
|
PosFlag = FALSE,
|
|
HelpFlag = FALSE,
|
|
ForeGroundFlag = FALSE,
|
|
ColorMapSize = 0,
|
|
BackGround = 0,
|
|
IrisPosX = 0,
|
|
IrisPosY = 0,
|
|
InterlacedOffset[] = { 0, 4, 2, 1 }, /* The way Interlaced image should. */
|
|
InterlacedJumps[] = { 8, 8, 4, 2 }; /* be read - offsets and jumps... */
|
|
static GifColorType
|
|
*ColorMap;
|
|
|
|
static void Screen2Iris(GifRowType *ScreenBuffer,
|
|
int ScreenWidth, int ScreenHeight);
|
|
|
|
/******************************************************************************
|
|
* Interpret the command line and scan the given GIF file. *
|
|
******************************************************************************/
|
|
int main(int argc, char **argv)
|
|
{
|
|
int i, j, Error, NumFiles, ImageNum = 0, Size, Row, Col, Width, Height,
|
|
ExtCode, Count;
|
|
GifRecordType RecordType;
|
|
GifByteType *Extension;
|
|
char **FileName = NULL;
|
|
GifRowType *ScreenBuffer;
|
|
GifFileType *GifFile;
|
|
|
|
if ((Error = GAGetArgs(argc, argv, CtrlStr,
|
|
&GifQuietPrint, &ForeGroundFlag,
|
|
&PosFlag, &IrisPosX, &IrisPosY,
|
|
&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(EXIT_FAILURE);
|
|
}
|
|
|
|
if (HelpFlag) {
|
|
fprintf(stderr, VersionStr);
|
|
GAPrintHowTo(CtrlStr);
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
if (NumFiles == 1) {
|
|
if ((GifFile = DGifOpenFileName(*FileName)) == NULL) {
|
|
PrintGifError();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
else {
|
|
/* Use the stdin instead: */
|
|
|
|
#ifdef __MSDOS__
|
|
setmode(0, O_BINARY);
|
|
#endif /* __MSDOS__ */
|
|
if ((GifFile = DGifOpenFileHandle(0)) == NULL) {
|
|
PrintGifError();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
/* Allocate the screen as vector of column of rows. We cannt allocate */
|
|
/* the all screen at once, as this broken minded CPU can allocate up to */
|
|
/* 64k at a time and our image can be bigger than that: */
|
|
/* Note this screen is device independent - its the screen as defined by */
|
|
/* the GIF file parameters itself. */
|
|
if ((ScreenBuffer = (GifRowType *)
|
|
malloc(GifFile->SHeight * sizeof(GifRowType *))) == NULL)
|
|
GIF_EXIT("Failed to allocate memory required, aborted.");
|
|
|
|
Size = GifFile->SWidth * sizeof(GifPixelType);/* Size in bytes one row.*/
|
|
if ((ScreenBuffer[0] = (GifRowType) malloc(Size)) == NULL) /* First row. */
|
|
GIF_EXIT("Failed to allocate memory required, aborted.");
|
|
|
|
for (i = 0; i < GifFile->SWidth; i++) /* Set its color to BackGround. */
|
|
ScreenBuffer[0][i] = GifFile->SBackGroundColor;
|
|
for (i = 1; i < GifFile->SHeight; i++) {
|
|
/* Allocate the other rows, and set their color to background too: */
|
|
if ((ScreenBuffer[i] = (GifRowType) malloc(Size)) == NULL)
|
|
GIF_EXIT("Failed to allocate memory required, aborted.");
|
|
|
|
memcpy(ScreenBuffer[i], ScreenBuffer[0], Size);
|
|
}
|
|
|
|
/* Scan the content of the GIF file and load the image(s) in: */
|
|
do {
|
|
if (DGifGetRecordType(GifFile, &RecordType) == GIF_ERROR) {
|
|
PrintGifError();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
switch (RecordType) {
|
|
case IMAGE_DESC_RECORD_TYPE:
|
|
if (DGifGetImageDesc(GifFile) == GIF_ERROR) {
|
|
PrintGifError();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
Row = GifFile->Image.Top; /* Image Position relative to Screen. */
|
|
Col = GifFile->Image.Left;
|
|
Width = GifFile->Image.Width;
|
|
Height = GifFile->Image.Height;
|
|
GifQprintf("\n%s: Image %d at (%d, %d) [%dx%d]: ",
|
|
PROGRAM_NAME, ++ImageNum, Col, Row, Width, Height);
|
|
if (GifFile->Image.Left + GifFile->Image.Width > GifFile->SWidth ||
|
|
GifFile->Image.Top + GifFile->Image.Height > GifFile->SHeight) {
|
|
fprintf(stderr, "Image %d is not confined to screen dimension, aborted.\n", ImageNum);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
if (GifFile->Image.Interlace) {
|
|
/* Need to perform 4 passes on the images: */
|
|
for (Count = i = 0; i < 4; i++)
|
|
for (j = Row + InterlacedOffset[i]; j < Row + Height;
|
|
j += InterlacedJumps[i]) {
|
|
GifQprintf("\b\b\b\b%-4d", Count++);
|
|
if (DGifGetLine(GifFile, &ScreenBuffer[j][Col],
|
|
Width) == GIF_ERROR) {
|
|
PrintGifError();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
for (i = 0; i < Height; i++) {
|
|
GifQprintf("\b\b\b\b%-4d", i);
|
|
if (DGifGetLine(GifFile, &ScreenBuffer[Row++][Col],
|
|
Width) == GIF_ERROR) {
|
|
PrintGifError();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case EXTENSION_RECORD_TYPE:
|
|
/* Skip any extension blocks in file: */
|
|
if (DGifGetExtension(GifFile, &ExtCode, &Extension) == GIF_ERROR) {
|
|
PrintGifError();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
while (Extension != NULL) {
|
|
if (DGifGetExtensionNext(GifFile, &Extension) == GIF_ERROR) {
|
|
PrintGifError();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
break;
|
|
case TERMINATE_RECORD_TYPE:
|
|
break;
|
|
default: /* Should be traps by DGifGetRecordType. */
|
|
break;
|
|
}
|
|
}
|
|
while (RecordType != TERMINATE_RECORD_TYPE);
|
|
|
|
/* Lets display it - set the global variables required and do it: */
|
|
BackGround = GifFile->SBackGroundColor;
|
|
ColorMap = (GifFile->Image.ColorMap ? GifFile->Image.ColorMap :
|
|
GifFile->SColorMap);
|
|
if (ColorMap == NULL) {
|
|
fprintf(stderr, "Gif Image does not have a colormap\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
ColorMapSize = 1 << ColorMap->BitsPerPixel;
|
|
GifQprintf("\n");
|
|
Screen2Iris(ScreenBuffer, GifFile->SWidth, GifFile->SHeight);
|
|
|
|
if (DGifCloseFile(GifFile) == GIF_ERROR) {
|
|
PrintGifError();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* The real display routine. *
|
|
******************************************************************************/
|
|
static void Screen2Iris(GifRowType *ScreenBuffer,
|
|
int ScreenWidth, int ScreenHeight)
|
|
{
|
|
short Val;
|
|
int i, j;
|
|
unsigned long *IrisScreenBuffer, *PBuffer;
|
|
|
|
if (ScreenWidth > XMAXSCREEN + 1 ||
|
|
ScreenHeight > YMAXSCREEN + 1)
|
|
GIF_EXIT("Input image is too big.");
|
|
|
|
if (PosFlag)
|
|
prefposition(IrisPosX, IrisPosX + ScreenWidth - 1,
|
|
IrisPosY, IrisPosY + ScreenHeight - 1);
|
|
else
|
|
prefsize(ScreenWidth, ScreenHeight);
|
|
if (ForeGroundFlag)
|
|
foreground();
|
|
|
|
winopen(PROGRAM_NAME);
|
|
RGBmode();
|
|
gconfig();
|
|
if ((IrisScreenBuffer = (unsigned long *)
|
|
malloc(ScreenWidth * ScreenHeight * sizeof(unsigned long))) == NULL)
|
|
GIF_EXIT("Failed to allocate memory required, aborted.");
|
|
|
|
PBuffer = IrisScreenBuffer;
|
|
for (i = ScreenHeight - 1; i >= 0; i--)
|
|
for (j = 0; j < ScreenWidth; j++)
|
|
*PBuffer++ = ColorMap[ScreenBuffer[i][j]].Red +
|
|
(ColorMap[ScreenBuffer[i][j]].Green << 8) +
|
|
(ColorMap[ScreenBuffer[i][j]].Blue << 16);
|
|
|
|
reshapeviewport();
|
|
lrectwrite(0, 0, ScreenWidth - 1, ScreenHeight - 1, IrisScreenBuffer);
|
|
|
|
while (TRUE) {
|
|
if (qread(&Val) == REDRAW) {
|
|
reshapeviewport();
|
|
lrectwrite(0, 0, ScreenWidth - 1, ScreenHeight - 1,
|
|
IrisScreenBuffer);
|
|
}
|
|
}
|
|
}
|