/*
generate and save the entire fractal
returns: 0 if successful
1 otherwise
*/
int generate_fractal(char *file, float width, float height, int workers) {
/* TODO: use fork(), mmap(), and munmap() to create a region of shared memory
to store fractal data, as generated by several child processes */
int fd = open(file,O_RDONLY);
color_t *fractal_data = mmap(NULL,sizeof(color_t)*height*width,PROT_READ|PROT_WRITE,MAP_ANONYMOUS|MAP_SHARED,fd,0);
int i,status;
int pids[workers];
for(i = 0; i < workers; i++)
{
if((pids[i]=fork())==0)
{
generate_fractal_region(fractal_data, width, height, i*(height/workers), (height/workers));
munmap(fractal_data,sizeof(color_t)*height*width);
exit(0);
}
}
for(i = 0; i < workers; i++)
{
waitpid(pids[i],&status,0);
}
if (save_image_data(file, fractal_data, width, height)) {
fprintf(stderr, "error saving to image file.\n");
free(fractal_data);
return 1;
}
munmap(fractal_data,sizeof(color_t)*height*width);
printf("Complete.\n");
return 0;
}
main( )
{
load_image_data( ); /* Input of image1 */
sobel_filtering( ); /* Sobel filter is applied to image1 */
save_image_data( ); /* Output of image2 */
return 0;
}
main( )
{
load_image_data( ); /* 画像データを image1 に読み込む */
make_inverse_image( ); /* image1 を反転させ image2 へ */
save_image_data( ); /* image2 を保存する */
return 0;
}
main( )
{
load_image_data( ); /* 画像データを image1 に読み込む */
make_sampling_image( ); /* image1 を標本化させ image2 へ */
save_image_data( ); /* image2 を保存する */
return 0;
}
/*
generate and save the entire fractal
returns: 0 if successful
1 otherwise
*/
int generate_fractal(char *file, float width, float height, int workers) {
color_t *fractal_data = malloc(sizeof(color_t)*width*height);
/*
generate data for the entire fractal
*/
generate_fractal_region(fractal_data, width, height, 0, height);
/*
save the generated fractal data into the file specified by argv[1]
*/
if (save_image_data(file, fractal_data, width, height)) {
fprintf(stderr, "error saving to image file.\n");
free(fractal_data);
return 1;
}
free(fractal_data);
printf("Complete \n");
return 0;
}
size_t map_io::map_save(const char* map_file,map_context* context)
{
if ( !context )
{
return MAP_STATUS_INVALID_CONTEXT;
}
FILE* fptr = fopen(map_file,"rb+");
if ( !fptr )
{
// 文件不存在时，需要创建文件
fptr = fopen(map_file,"wb+");
if ( !fptr )
{
return MAP_STATUS_FILE_NOT_FOUND;
}
}
size_t ret = 0;
do
{
if ( context->type == MAP_CONTEXT_PSD )
{
context->terrain.image_data_offset = sizeof(map_header);
// 地图图片信息之后紧跟遮挡物件图片信息
context->mask_data_offset = context->terrain.image_data_offset + context->terrain.image_data_size;
//map_terrain::image_data multiple
ret = save_image_data(fptr,context);
//if(ret == 0) break;
//map_mask::mask_data multiple
ret = save_mask_image_data(fptr,context);
//if(ret == 0) break;
context->header.block_offset = context->mask_data_offset + context->mask_data_size;
}
//blocks
ret = save_map_blocks(fptr,context);
//if(ret == 0) break;
// header
ret = save_map_header(fptr,context);
//if(ret == 0) break;
}
while(0);
fflush(fptr);
fclose(fptr);
return MAP_STATUS_OK;
}
