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#ifndef _plan9_
#include <string.h>
#include <fconfig.h>
#include <assert.h>
#ifdef NO_MALLOC_H
#include <stdlib.h>
#else
#include <malloc.h>
#endif
#include <stdio.h>
#else
#include <u.h>
#include <libc.h>
#include <stdio.h>
#include <fconfig.h>
#endif
#include <filter.h>
void flipgeneric(struct image *img)
{
pixel_t **line;
assert(img->nimages == 2);
img->currimage ^= 1;
line = img->currlines;
img->currlines = img->oldlines;
img->oldlines = line;
}
int bytesperpixel(int type)
{
switch (type) {
case MBITMAP:
case LBITMAP:
case LIBITMAP:
case MIBITMAP:
return 0;
case SMALLITER:
case FIXEDCOLOR:
case GRAYSCALE:
case C256:
return 1;
case LARGEITER:
case TRUECOLOR16:
return 2;
case TRUECOLOR24:
return 3;
case TRUECOLOR:
return 4;
default:
assert(0);
return 0;
}
}
struct image *create_image_lines(int width, int height,
int nimages, pixel_t ** lines1,
pixel_t ** lines2,
struct palette *palette,
void (*flip) (struct image * img),
int flags, float pixelwidth,
float pixelheight)
{
int i;
static int version = 1;
struct image *img = (struct image *) calloc(1, sizeof(*img));
if (img == NULL)
return NULL;
if (flip == NULL)
flip = flipgeneric;
img->width = width;
img->height = height;
img->nimages = nimages;
img->bytesperpixel = bytesperpixel(palette->type);
img->palette = palette;
img->currimage = 0;
img->flip = flip;
img->flags = flags;
img->version = version;
version += 65535;
img->currlines = lines1;
img->oldlines = lines2;
img->pixelwidth = pixelwidth;
img->pixelheight = pixelheight;
if (lines1 != NULL && (nimages != 2 || lines2 != NULL)) {
img->scanline = (int) (lines1[1] - lines1[0]);
if (img->scanline < 0)
img->scanline = -1;
else {
for (i = 0; i < height; i++) {
if (lines1[0] - lines1[i] != img->scanline * i) {
img->scanline = -1;
break;
}
if (nimages == 2
&& lines2[0] - lines2[i] != img->scanline * i) {
img->scanline = -1;
break;
}
}
}
} else
img->scanline = -1;
return (img);
}
struct image *create_image_cont(int width, int height, int scanlinesize,
int nimages, pixel_t * buf1,
pixel_t * buf2, struct palette *palette,
void (*flip) (struct image * img),
int flags, float pixelwidth,
float pixelheight)
{
struct image *img =
create_image_lines(width, height, nimages, NULL, NULL, palette,
flip,
flags, pixelwidth, pixelheight);
int i;
if (img == NULL) {
return NULL;
}
if ((img->currlines =
(pixel_t **) malloc(sizeof(*img->currlines) * height)) == NULL) {
free(img);
return NULL;
}
if (nimages == 2) {
if ((img->oldlines =
(pixel_t **) malloc(sizeof(*img->oldlines) * height)) == NULL)
{
free(img->currlines);
free(img);
return NULL;
}
}
for (i = 0; i < img->height; i++) {
img->currlines[i] = buf1;
buf1 += scanlinesize;
}
if (nimages == 2)
for (i = 0; i < img->height; i++) {
img->oldlines[i] = buf2;
buf2 += scanlinesize;
}
img->flags |= FREELINES;
img->scanline = scanlinesize;
return (img);
}
struct image *create_image_mem(int width, int height, int nimages,
struct palette *palette, float pixelwidth,
float pixelheight)
{
unsigned char *data =
(unsigned char *) calloc(((width + 3) & ~3) * height,
bytesperpixel(palette->type));
unsigned char *data1 =
(unsigned char *) (nimages ==
2 ? calloc(((width + 3) & ~3) * height,
bytesperpixel(palette->
type)) : NULL);
struct image *img;
if (data == NULL) {
#ifdef DEBUG
printf("Image:out of memory\n");
#endif
return (NULL);
}
if (nimages == 2 && data1 == NULL) {
free(data);
#ifdef DEBUG
printf("Image:out of memory2\n");
#endif
return NULL;
}
img =
create_image_cont(width, height,
((width +
3) & ~3) * bytesperpixel(palette->type),
nimages, data, data1, palette, NULL, 0,
pixelwidth, pixelheight);
if (img == NULL) {
free(data);
if (data1 != NULL)
free(data1);
return NULL;
}
img->flags |= FREEDATA;
return (img);
}
struct image *create_subimage(struct image *simg, int width, int height,
int nimages, struct palette *palette,
float pixelwidth, float pixelheight)
{
int size = height * bytesperpixel(palette->type);
int i;
int shift1 = 0, shift2 = 0;
struct image *img;
if (size > simg->height * simg->bytesperpixel || height > simg->height
|| (nimages == 2 && simg->nimages == 1))
return (create_image_mem
(width, height, nimages, palette, pixelwidth,
pixelheight));
nimages = simg->nimages;
img =
create_image_lines(width, height, nimages, NULL, NULL, palette,
NULL, 0, pixelwidth, pixelheight);
if (img == NULL)
return NULL;
if ((img->currlines =
(pixel_t **) malloc(sizeof(*img->currlines) * height)) == NULL) {
free(img);
return NULL;
}
if (nimages == 2) {
if ((img->oldlines =
(pixel_t **) malloc(sizeof(*img->oldlines) * height)) == NULL)
{
free(img->currlines);
free(img);
return NULL;
}
}
shift1 = simg->height - img->height;
shift2 =
simg->width * simg->bytesperpixel -
img->width * img->bytesperpixel;
for (i = 0; i < img->height; i++) {
img->currlines[i] = simg->currlines[i + shift1] + shift2;
}
if (nimages == 2)
for (i = 0; i < img->height; i++) {
img->oldlines[i] = simg->oldlines[i + shift1] + shift2;
}
img->flags |= FREELINES;
img->currimage = simg->currimage;
return (img);
}
void destroy_image(struct image *img)
{
if (img->flags & FREEDATA) {
free(*img->currlines);
if (img->nimages == 2)
free(*img->oldlines);
}
if (img->flags & FREELINES) {
free(img->currlines);
if (img->nimages == 2)
free(img->oldlines);
}
free(img);
}
void clear_image(struct image *img)
{
int i;
int color = img->palette->pixels[0];
int width = img->width * img->bytesperpixel;
if (img->palette->npreallocated)
color = img->palette->index[0];
if (!width) {
width = (img->width + 7) / 8;
if (color)
color = 255;
}
for (i = 0; i < img->height; i++)
memset(img->currlines[i], color, width);
}
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