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xpm-3.4
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XpmCrDataFrI.c
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C/C++ Source or Header
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1994-03-14
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8KB
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307 lines
/* Copyright 1989-94 GROUPE BULL -- See license conditions in file COPYRIGHT */
/*****************************************************************************\
* XpmCrDataFI.c: *
* *
* XPM library *
* Scan an image and possibly its mask and create an XPM array *
* *
* Developed by Arnaud Le Hors *
\*****************************************************************************/
#include "xpmP.h"
#ifdef VMS
#include "sys$library:string.h"
#else
#if defined(SYSV) || defined(SVR4)
#include <string.h>
#else
#include <strings.h>
#endif
#endif
LFUNC(CreateColors, int, (char **dataptr, unsigned int *data_size,
XpmColor *colors, unsigned int ncolors,
unsigned int cpp));
LFUNC(CreatePixels, void, (char **dataptr, unsigned int width,
unsigned int height, unsigned int cpp,
unsigned int *pixels, XpmColor *colors));
LFUNC(CountExtensions, void, (XpmExtension *ext, unsigned int num,
unsigned int *ext_size,
unsigned int *ext_nlines));
LFUNC(CreateExtensions, void, (char **dataptr, unsigned int offset,
XpmExtension *ext, unsigned int num,
unsigned int ext_nlines));
int
XpmCreateDataFromImage(display, data_return, image, shapeimage, attributes)
Display *display;
char ***data_return;
XImage *image;
XImage *shapeimage;
XpmAttributes *attributes;
{
XpmImage xpmimage;
XpmInfo info;
int ErrorStatus;
/* initialize return value */
if (data_return)
*data_return = NULL;
/* create an XpmImage from the image */
ErrorStatus = XpmCreateXpmImageFromImage(display, image, shapeimage,
&xpmimage, attributes);
if (ErrorStatus != XpmSuccess)
return (ErrorStatus);
/* create the data from the XpmImage */
if (attributes) {
xpmSetInfo(&info, attributes);
ErrorStatus = XpmCreateDataFromXpmImage(data_return, &xpmimage, &info);
} else
ErrorStatus = XpmCreateDataFromXpmImage(data_return, &xpmimage, NULL);
/* free the XpmImage */
XpmFreeXpmImage(&xpmimage);
return (ErrorStatus);
}
#undef RETURN
#define RETURN(status) \
{ \
if (header) { \
for (l = 0; l < header_nlines; l++) \
if (header[l]) \
XpmFree(header[l]); \
XpmFree(header); \
} \
return(status); \
}
int
XpmCreateDataFromXpmImage(data_return, image, info)
char ***data_return;
XpmImage *image;
XpmInfo *info;
{
/* calculation variables */
int ErrorStatus;
char buf[BUFSIZ];
char **header = NULL, **data, **sptr, **sptr2, *s;
unsigned int header_size, header_nlines;
unsigned int data_size, data_nlines;
unsigned int extensions = 0, ext_size = 0, ext_nlines = 0;
unsigned int offset, l, n;
*data_return = NULL;
extensions = info && (info->valuemask & XpmExtensions)
&& info->nextensions;
/* compute the number of extensions lines and size */
if (extensions)
CountExtensions(info->extensions, info->nextensions,
&ext_size, &ext_nlines);
/*
* alloc a temporary array of char pointer for the header section which
* is the hints line + the color table lines
*/
header_nlines = 1 + image->ncolors;
header_size = sizeof(char *) * header_nlines;
header = (char **) XpmCalloc(header_size, sizeof(char *));
if (!header)
return (XpmNoMemory);
/* print the hints line */
s = buf;
sprintf(s, "%d %d %d %d", image->width, image->height,
image->ncolors, image->cpp);
s += strlen(s);
if (info && (info->valuemask & XpmHotspot)) {
sprintf(s, " %d %d", info->x_hotspot, info->y_hotspot);
s += strlen(s);
}
if (extensions)
sprintf(s, " XPMEXT");
l = strlen(buf) + 1;
*header = (char *) XpmMalloc(l);
if (!*header)
RETURN(XpmNoMemory);
header_size += l;
strcpy(*header, buf);
/* print colors */
ErrorStatus = CreateColors(header + 1, &header_size,
image->colorTable, image->ncolors, image->cpp);
if (ErrorStatus != XpmSuccess)
RETURN(ErrorStatus);
/* now we know the size needed, alloc the data and copy the header lines */
offset = image->width * image->cpp + 1;
data_size = header_size + (image->height + ext_nlines) * sizeof(char *)
+ image->height * offset + ext_size;
data = (char **) XpmMalloc(data_size);
if (!data)
RETURN(XpmNoMemory);
data_nlines = header_nlines + image->height + ext_nlines;
*data = (char *) (data + data_nlines);
n = image->ncolors;
for (l = 0, sptr = data, sptr2 = header; l <= n; l++, sptr++, sptr2++) {
strcpy(*sptr, *sptr2);
*(sptr + 1) = *sptr + strlen(*sptr2) + 1;
}
/* print pixels */
data[header_nlines] = (char *) data + header_size
+ (image->height + ext_nlines) * sizeof(char *);
CreatePixels(data + header_nlines, image->width, image->height,
image->cpp, image->data, image->colorTable);
/* print extensions */
if (extensions)
CreateExtensions(data + header_nlines + image->height - 1, offset,
info->extensions, info->nextensions,
ext_nlines);
*data_return = data;
RETURN(XpmSuccess);
}
static int
CreateColors(dataptr, data_size, colors, ncolors, cpp)
char **dataptr;
unsigned int *data_size;
XpmColor *colors;
unsigned int ncolors;
unsigned int cpp;
{
char buf[BUFSIZ];
unsigned int a, key, l;
char *s, *s2;
char **defaults;
for (a = 0; a < ncolors; a++, colors++, dataptr++) {
defaults = (char **) colors;
strncpy(buf, *defaults++, cpp);
s = buf + cpp;
for (key = 1; key <= NKEYS; key++, defaults++) {
if (s2 = *defaults) {
sprintf(s, "\t%s %s", xpmColorKeys[key - 1], s2);
s += strlen(s);
}
}
l = strlen(buf) + 1;
s = (char *) XpmMalloc(l);
if (!s)
return (XpmNoMemory);
*data_size += l;
strcpy(s, buf);
*dataptr = s;
}
return (XpmSuccess);
}
static void
CreatePixels(dataptr, width, height, cpp, pixels, colors)
char **dataptr;
unsigned int width;
unsigned int height;
unsigned int cpp;
unsigned int *pixels;
XpmColor *colors;
{
char *s;
unsigned int x, y, h, offset;
h = height - 1;
offset = width * cpp + 1;
for (y = 0; y < h; y++, dataptr++) {
s = *dataptr;
for (x = 0; x < width; x++, pixels++) {
strncpy(s, colors[*pixels].string, cpp);
s += cpp;
}
*s = '\0';
*(dataptr + 1) = *dataptr + offset;
}
/* duplicate some code to avoid a test in the loop */
s = *dataptr;
for (x = 0; x < width; x++, pixels++) {
strncpy(s, colors[*pixels].string, cpp);
s += cpp;
}
*s = '\0';
}
static void
CountExtensions(ext, num, ext_size, ext_nlines)
XpmExtension *ext;
unsigned int num;
unsigned int *ext_size;
unsigned int *ext_nlines;
{
unsigned int x, y, a, size, nlines;
char **line;
size = 0;
nlines = 0;
for (x = 0; x < num; x++, ext++) {
/* 1 for the name */
nlines += ext->nlines + 1;
/* 8 = 7 (for "XPMEXT ") + 1 (for 0) */
size += strlen(ext->name) + 8;
a = ext->nlines;
for (y = 0, line = ext->lines; y < a; y++, line++)
size += strlen(*line) + 1;
}
/* 10 and 1 are for the ending "XPMENDEXT" */
*ext_size = size + 10;
*ext_nlines = nlines + 1;
}
static void
CreateExtensions(dataptr, offset, ext, num, ext_nlines)
char **dataptr;
unsigned int offset;
XpmExtension *ext;
unsigned int num;
unsigned int ext_nlines;
{
unsigned int x, y, a, b;
char **line;
*(dataptr + 1) = *dataptr + offset;
dataptr++;
a = 0;
for (x = 0; x < num; x++, ext++) {
sprintf(*dataptr, "XPMEXT %s", ext->name);
a++;
if (a < ext_nlines)
*(dataptr + 1) = *dataptr + strlen(ext->name) + 8;
dataptr++;
b = ext->nlines;
for (y = 0, line = ext->lines; y < b; y++, line++) {
strcpy(*dataptr, *line);
a++;
if (a < ext_nlines)
*(dataptr + 1) = *dataptr + strlen(*line) + 1;
dataptr++;
}
}
strcpy(*dataptr, "XPMENDEXT");
}