/*
* Prints each vertex v from 0 to n-1 the successors of v
*/
void digraph_print ( DiGraph DG )
{
if (DG != NULL)
{
int p;
for (p = 0; p < DG -> nVertices; p++)
{
printf("Vertex:[%i] -> ", p);
edge_print( p, &DG -> L[p] );
printf("\n");
}
}
}
struct drawable *drawable_from(char *path) {
struct drawable *this = malloc(sizeof(struct drawable));
this->data = NULL;
this->w = this->h = 0;
this->is9png = false;
edge_empty(&this->border);
edge_empty(&this->padding);
int n,w,h;
uint8_t *data = stbi_load(path, &w, &h, &n, 4);
int x,y;
uint8_t *src;
uint32_t ind;
uint8_t tmp;
if(data != NULL) {
//0xAARRGGBB变成0xAABBGGRR
src = (uint8_t *)(data);
for(y = 0;y < h;++y){
for(x = 0;x < w;++x){
ind = (x + y * w) * 4;
tmp = src[ind + 0];
src[ind + 0] = src[ind + 2];
src[ind + 2] = tmp;
}
}
this->data = (uint32_t *)data;
this->pitch = w;
this->w = w;
this->h = h;
}
int len;
if((len = strlen(path)) > 6 && !strcmp(path + len - 6, ".9.png")) {
this->is9png = true;
bool fill = false;
//border
for(x = 0;x < w;++x){
if( ((uint32_t *)this->data)[x]) {
if(fill == false) {
fill = true;
this->border.left = x;
}
} else {
if(fill == true) {
fill = false;
this->border.right = w - x;
break;
}
}
}
if(fill == true) {
this->border.right = 0;
}
fill = false;
for(y = 0;y < h;++y){
if( ((uint32_t *)this->data)[0 + y * w]) {
if(fill == false) {
fill = true;
this->border.top = y;
}
} else {
if(fill == true) {
fill = false;
this->border.bottom = h - y;
break;
}
}
}
if(fill == true) {
this->border.bottom = 0;
}
//padding
fill = false;
for(x = 0;x < w;++x){
if( ((uint32_t *)this->data)[x + (h-1) * w]) {
if(fill == false) {
fill = true;
this->padding.left = x;
}
} else {
if(fill == true) {
fill = false;
this->padding.right = w - x;
break;
}
}
}
if(fill == true) {
this->padding.right = 0;
}
fill = false;
for(y = 0;y < h;++y){
if( ((uint32_t *)this->data)[(w - 1) + y * w]) {
if(fill == false) {
fill = true;
this->padding.top = y;
}
} else {
if(fill == true) {
fill = false;
this->padding.bottom = h - y;
break;
}
}
}
if(fill == true) {
this->padding.bottom = 0;
}
//去掉边缘1个像素
edge_offset(&this->border,-1);
edge_offset(&this->padding,-1);
this->w-=2;
this->h-=2;
}
edge_print(&this->border);
edge_print(&this->padding);
return this;
}
