种子点区域生成法c++代码

种子点区域生成法c++代码

bool pop(int &x, int &y)
{
if(stackPointer > 0)
{
int p = stack[stackPointer];
x = p / h;
y = p % h;
stackPointer--;
return 1;
}
else
{
return 0;
}
}

bool push(int x, int y)
{
if(stackPointer < stackSize - 1)
{
stackPointer++;
stack[stackPointer] = h * x + y;
return 1;
}
else
{
return 0;
}
}
void floodFill8Stack(int x, int y, int newColor, int oldColor)
{
if(newColor == oldColor) return; //avoid infinite loop
emptyStack();

if(!push(x, y)) return;
while(pop(x, y))
{
screenBuffer[x][y] = newColor;
if(x + 1 < w && screenBuffer[x + 1][y] == oldColor)
{
if(!push(x + 1, y)) return;
}
if(x - 1 >= 0 && screenBuffer[x - 1][y] == oldColor)
{
if(!push(x - 1, y)) return;
}
if(y + 1 < h && screenBuffer[x][y + 1] == oldColor)
{
if(!push(x, y + 1)) return;
}
if(y - 1 >= 0 && screenBuffer[x][y - 1] == oldColor)
{
if(!push(x, y - 1)) return;
}
if(x + 1 < w && y + 1 < h && screenBuffer[x + 1][y + 1] == oldColor)
{
if(!push(x + 1, y + 1)) return;
}
if(x + 1 < w && y - 1 >= 0 && screenBuffer[x + 1][y - 1] == oldColor)
{
if(!push(x + 1, y - 1)) return;
}
if(x - 1 >= 0 && y + 1 < h && screenBuffer[x - 1][y + 1] == oldColor)
{
if(!push(x - 1, y + 1)) return;
}
if(x - 1 >= 0 && y - 1 >= 0 && screenBuffer[x - 1][y - 1] == oldColor)
{
if(!push(x - 1, y - 1)) return;
}
}
}

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