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Fractal Frenzy 1
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new.c
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C/C++ Source or Header
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1991-05-20
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4KB
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210 lines
/* new.c:
*
* functions to allocate and deallocate structures and structure data
*
* jim frost 09.29.89
*
* Copyright 1989, 1991 Jim Frost.
* See included file "copyright.h" for complete copyright information.
*/
#include "copyright.h"
#include "image.h"
extern int _Xdebug;
/* this table is useful for quick conversions between depth and ncolors
*/
unsigned long DepthToColorsTable[] = {
/* 0 */ 1,
/* 1 */ 2,
/* 2 */ 4,
/* 3 */ 8,
/* 4 */ 16,
/* 5 */ 32,
/* 6 */ 64,
/* 7 */ 128,
/* 8 */ 256,
/* 9 */ 512,
/* 10 */ 1024,
/* 11 */ 2048,
/* 12 */ 4096,
/* 13 */ 8192,
/* 14 */ 16384,
/* 15 */ 32768,
/* 16 */ 65536,
/* 17 */ 131072,
/* 18 */ 262144,
/* 19 */ 524288,
/* 20 */ 1048576,
/* 21 */ 2097152,
/* 22 */ 4194304,
/* 23 */ 8388608,
/* 24 */ 16777216,
/* 25 */ 33554432,
/* 26 */ 67108864,
/* 27 */ 134217728,
/* 28 */ 268435456,
/* 29 */ 536870912,
/* 30 */ 1073741824,
/* 31 */ 2147483648,
/* 32 */ 2147483648 /* bigger than unsigned int; this is good enough */
};
unsigned long colorsToDepth(ncolors)
unsigned long ncolors;
{ unsigned long a;
for (a= 0; (a < 32) && (DepthToColorsTable[a] < ncolors); a++)
/* EMPTY */
;
return(a);
}
char *dupString(s)
char *s;
{ char *d;
if (!s)
return(NULL);
d= (char *)lmalloc(strlen(s) + 1);
strcpy(d, s);
return(d);
}
void newRGBMapData(rgb, size)
RGBMap *rgb;
unsigned int size;
{
rgb->used= 0;
rgb->size= size;
rgb->compressed= 0;
rgb->red= (Intensity *)lmalloc(sizeof(Intensity) * size);
rgb->green= (Intensity *)lmalloc(sizeof(Intensity) * size);
rgb->blue= (Intensity *)lmalloc(sizeof(Intensity) * size);
}
void freeRGBMapData(rgb)
RGBMap *rgb;
{
lfree((byte *)rgb->red);
lfree((byte *)rgb->green);
lfree((byte *)rgb->blue);
}
Image *newBitImage(width, height)
unsigned int width, height;
{ Image *image;
unsigned int linelen;
image= (Image *)lmalloc(sizeof(Image));
image->type= IBITMAP;
image->title= NULL;
newRGBMapData(&(image->rgb), (unsigned int)2);
*(image->rgb.red)= *(image->rgb.green)= *(image->rgb.blue)= 65535;
*(image->rgb.red + 1)= *(image->rgb.green + 1)= *(image->rgb.blue + 1)= 0;
image->rgb.used= 2;
image->width= width;
image->height= height;
image->depth= 1;
linelen= (width / 8) + (width % 8 ? 1 : 0); /* thanx johnh@amcc.com */
image->data= (unsigned char *)lcalloc(linelen * height);
return(image);
}
Image *newRGBImage(width, height, depth)
unsigned int width, height, depth;
{ Image *image;
unsigned int pixlen, numcolors, a;
pixlen= (depth / 8) + (depth % 8 ? 1 : 0);
if (pixlen == 0) /* special case for `zero' depth image, which is */
pixlen= 1; /* sometimes interpreted as `one color' */
numcolors = depthToColors(depth);
image= (Image *)lmalloc(sizeof(Image));
image->type= IRGB;
image->title= NULL;
newRGBMapData(&(image->rgb), numcolors);
image->width= width;
image->height= height;
image->depth= depth;
image->pixlen= pixlen;
image->data= (unsigned char *)lmalloc(width * height * pixlen);
return(image);
}
Image *newTrueImage(width, height)
unsigned int width, height;
{ Image *image;
unsigned int pixlen, numcolors, a;
image= (Image *)lmalloc(sizeof(Image));
image->type= ITRUE;
image->title= NULL;
image->rgb.used= image->rgb.size= 0;
image->width= width;
image->height= height;
image->depth= 24;
image->pixlen= 3;
image->data= (unsigned char *)lmalloc(width * height * 3);
return(image);
}
void freeImageData(image)
Image *image;
{
if (image->title) {
lfree((byte *)image->title);
image->title= NULL;
}
if (!TRUEP(image))
freeRGBMapData(&(image->rgb));
lfree(image->data);
}
void freeImage(image)
Image *image;
{
freeImageData(image);
lfree((byte *)image);
}
byte *lmalloc(size)
unsigned int size;
{ byte *area;
if (size == 0) {
size= 1;
if (_Xdebug)
fprintf(stderr, "lcalloc given zero size!\n");
}
if (!(area= (byte *)malloc(size))) {
memoryExhausted();
/* NOTREACHED */
}
return(area);
}
byte *lcalloc(size)
unsigned int size;
{ byte *area;
if (size == 0) {
size= 1;
if (_Xdebug)
fprintf(stderr, "lcalloc given zero size!\n");
}
if (!(area= (byte *)calloc(1, size))) {
memoryExhausted();
/* NOTREACHED */
}
return(area);
}
void lfree(area)
byte *area;
{
free(area);
}