本文整理汇总了C++中wxRegion::Union方法的典型用法代码示例。如果您正苦于以下问题：C++ wxRegion::Union方法的具体用法？C++ wxRegion::Union怎么用？C++ wxRegion::Union使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类wxRegion的用法示例。
在下文中一共展示了wxRegion::Union方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: DoRegionUnion
static bool DoRegionUnion(wxRegion& region,
const wxImage& image,
unsigned char loR,
unsigned char loG,
unsigned char loB,
int tolerance)
{
unsigned char hiR, hiG, hiB;
hiR = (unsigned char)wxMin(0xFF, loR + tolerance);
hiG = (unsigned char)wxMin(0xFF, loG + tolerance);
hiB = (unsigned char)wxMin(0xFF, loB + tolerance);
// Loop through the image row by row, pixel by pixel, building up
// rectangles to add to the region.
int width = image.GetWidth();
int height = image.GetHeight();
for (int y=0; y < height; y++)
{
wxRect rect;
rect.y = y;
rect.height = 1;
for (int x=0; x < width; x++)
{
// search for a continuous range of non-transparent pixels
int x0 = x;
while ( x < width)
{
unsigned char R = image.GetRed(x,y);
unsigned char G = image.GetGreen(x,y);
unsigned char B = image.GetBlue(x,y);
if (( R >= loR && R <= hiR) &&
( G >= loG && G <= hiG) &&
( B >= loB && B <= hiB)) // It's transparent
break;
x++;
}
// Add the run of non-transparent pixels (if any) to the region
if (x > x0) {
rect.x = x0;
rect.width = x - x0;
region.Union(rect);
}
}
}
return true;
}