wbmp.c
资源名称:gateway-1.2.1 [点击查看]
上传用户:gzpyjq
上传日期:2013-01-31
资源大小:1852k
文件大小:2k
源码类别:
手机WAP编程
开发平台:
WINDOWS
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <errno.h>
- #include "gwlib/gwlib.h"
- #include "wbmp.h"
- /* create empty WBMP */
- WBMP *wbmp_create_empty(void)
- {
- WBMP *new;
- new = gw_malloc(sizeof(WBMP));
- memset(new, 0, sizeof(WBMP));
- return new;
- }
- /* delete a WBMP, freeing everything */
- void wbmp_delete(WBMP *pic)
- {
- gw_free(pic->ext_header_field);
- gw_free(pic->main_image);
- if (pic->animated_image) {
- int i;
- for(i=0; i < pic->animimg_count; i++)
- gw_free(pic->animated_image[i]);
- gw_free(pic->animated_image);
- }
- gw_free(pic);
- }
- WBMP *wbmp_create(int type, int width, int height, Octet *data, int flags)
- {
- WBMP *new;
- int i, siz;
- Octet val;
- new = wbmp_create_empty();
- new->type_field = type;
- if (type == 0) {
- new->fix_header_field = 0x00;
- } else {
- error(0, "WBMP type %d not supported", type);
- return NULL;
- }
- new->width = width;
- new->height = height;
- siz = (width+7)/8 * height;
- new->main_image = gw_malloc(siz);
- for(i=0; i < siz; i++) {
- if (flags & REVERSE) val = reverse_octet(data[i]);
- else val = data[i];
- if (flags & NEGATIVE) val = ~val;
- new->main_image[i] = val;
- }
- return new;
- }
- /* create Octet stream from given WBMP */
- int wbmp_create_stream(WBMP *pic, Octet **stream)
- {
- Octet tmp_w[30], tmp_h[30];
- int wl, hl, pic_size;
- wl = write_variable_value(pic->width, tmp_w);
- hl = write_variable_value(pic->height, tmp_h);
- pic_size = ((pic->width+7)/8) * pic->height;
- if (pic->type_field != 0) {
- error(0, "Unknown WBMP type %d, cannot convert", pic->type_field);
- return -1;
- }
- *stream = gw_malloc(2+wl+hl+pic_size);
- sprintf(*stream, "%c%c", 0x00, 0x00);
- memcpy(*stream+2, tmp_w, wl);
- memcpy(*stream+2+wl, tmp_h, hl);
- memcpy(*stream+2+wl+hl, pic->main_image, pic_size);
- debug("util", 0, "picture %d x %d, stream length %d",
- pic->width, pic->height, 2+wl+hl+pic_size);
- return (2+wl+hl+pic_size);
- }