iPad中的洪水填充太慢了

Question

我在iPad上使用Flood Filling作为我的一个Coloring应用程序.

该应用程序基本上填充图像的黑线内的颜色,我能够毫无问题地做到这一点,但它太慢了.

结论:

我终于设法使用以下Class为iPhone/iPad制作了可接受的Floodfill

请原谅任何僵尸代码:),建议改进总是欢迎

*如何使用* 创建CanvasView对象并设置originalImage(这应该是带有黑色线条的无色/彩色图像,黑色线条以外的区域必须是清晰的颜色),您可以在绘制后访问图像的coloredImage.

.h文件

-(void)floodFillAtPoint:(CGPoint)atPoint
 {
Stack *stack = [[Stack alloc] init];

[stack push:[StackPoint pointWithPoint:atPoint]];
StackPoint *currentPoint = nil;
int counter = 0;
while ((currentPoint = [stack pop])) 
{
    CGPoint aPoint = currentPoint.point;//CGPointMake(pointPixel.x, pointPixel.y);
    [self setColorAtPoint:aPoint];
    CGPoint bPoint = aPoint;
    bPoint.x+=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];
    bPoint = aPoint;
    bPoint.x-=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];
    bPoint = aPoint;
    bPoint.y+=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];
    bPoint = aPoint;
    bPoint.y-=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];        
    counter++;
}
[stack release];

}

和.m文件

-(void)floodFillAtPoint:(CGPoint)atPoint
 {
Stack *stack = [[Stack alloc] init];

[stack push:[StackPoint pointWithPoint:atPoint]];
StackPoint *currentPoint = nil;
int counter = 0;
while ((currentPoint = [stack pop])) 
{
    CGPoint aPoint = currentPoint.point;//CGPointMake(pointPixel.x, pointPixel.y);
    [self setColorAtPoint:aPoint];
    CGPoint bPoint = aPoint;
    bPoint.x+=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];
    bPoint = aPoint;
    bPoint.x-=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];
    bPoint = aPoint;
    bPoint.y+=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];
    bPoint = aPoint;
    bPoint.y-=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];        
    counter++;
}
[stack release];

}

附加信息:

StackPoint.h

-(void)floodFillAtPoint:(CGPoint)atPoint
 {
Stack *stack = [[Stack alloc] init];

[stack push:[StackPoint pointWithPoint:atPoint]];
StackPoint *currentPoint = nil;
int counter = 0;
while ((currentPoint = [stack pop])) 
{
    CGPoint aPoint = currentPoint.point;//CGPointMake(pointPixel.x, pointPixel.y);
    [self setColorAtPoint:aPoint];
    CGPoint bPoint = aPoint;
    bPoint.x+=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];
    bPoint = aPoint;
    bPoint.x-=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];
    bPoint = aPoint;
    bPoint.y+=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];
    bPoint = aPoint;
    bPoint.y-=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];        
    counter++;
}
[stack release];

}

StackPoint.m

-(void)floodFillAtPoint:(CGPoint)atPoint
 {
Stack *stack = [[Stack alloc] init];

[stack push:[StackPoint pointWithPoint:atPoint]];
StackPoint *currentPoint = nil;
int counter = 0;
while ((currentPoint = [stack pop])) 
{
    CGPoint aPoint = currentPoint.point;//CGPointMake(pointPixel.x, pointPixel.y);
    [self setColorAtPoint:aPoint];
    CGPoint bPoint = aPoint;
    bPoint.x+=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];
    bPoint = aPoint;
    bPoint.x-=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];
    bPoint = aPoint;
    bPoint.y+=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];
    bPoint = aPoint;
    bPoint.y-=1;
    if([self checkForValidRegionAtPoint:bPoint])
        [stack push:[StackPoint pointWithPoint:bPoint]];        
    counter++;
}
[stack release];

}

我希望这有任何帮助!!! 请享用 :)

Answer 1

使用Objective-C对象来表示每个像素将会非常缓慢并且几乎没有任何好处.

使用不同的数据结构来表示您的位图,就像各种CG*位图封装机制之一一样.然后直接旋转位图中的位.这将是吨和吨更快.