本文整理汇总了C++中wxImage::SetAlpha方法的典型用法代码示例。如果您正苦于以下问题：C++ wxImage::SetAlpha方法的具体用法？C++ wxImage::SetAlpha怎么用？C++ wxImage::SetAlpha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wxImage的用法示例。
在下文中一共展示了wxImage::SetAlpha方法的2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: convertToVanillaImage
void zen::convertToVanillaImage(wxImage& img)
{
if (!img.HasAlpha())
{
const int width = img.GetWidth ();
const int height = img.GetHeight();
if (width <= 0 || height <= 0) return;
unsigned char mask_r = 0;
unsigned char mask_g = 0;
unsigned char mask_b = 0;
const bool haveMask = img.HasMask() && img.GetOrFindMaskColour(&mask_r, &mask_g, &mask_b);
//check for mask before calling wxImage::GetOrFindMaskColour() to skip needlessly searching for new mask color
img.SetAlpha();
::memset(img.GetAlpha(), wxIMAGE_ALPHA_OPAQUE, width * height);
//wxWidgets, as always, tries to be more clever than it really is and fucks up wxStaticBitmap if wxBitmap is fully opaque:
img.GetAlpha()[width * height - 1] = 254;
if (haveMask)
{
img.SetMask(false);
unsigned char* alphaPtr = img.GetAlpha();
const unsigned char* dataPtr = img.GetData();
const int pixelCount = width * height;
for (int i = 0; i < pixelCount; ++ i)
{
const unsigned char r = *dataPtr++;
const unsigned char g = *dataPtr++;
const unsigned char b = *dataPtr++;
if (r == mask_r &&
g == mask_g &&
b == mask_b)
alphaPtr[i] = wxIMAGE_ALPHA_TRANSPARENT;
}
}
}
else
{
assert(!img.HasMask());
}
}示例2: AssignImgData
void Map::AssignImgData(ImgData *imgdata, wxImage &img)
{
if(imgdata == NULL) return;
if(img.IsOk())
{
unsigned char *pixdata, *alphadata;
int width, height;
long datasize;
if(!img.HasAlpha()) img.SetAlpha();
width = img.GetWidth();
height = img.GetHeight();
pixdata = img.GetData();
alphadata = img.GetAlpha();
datasize = (long) 4 * width * height;
(*imgdata).width = (long)width;
(*imgdata).height = (long)height;
(*imgdata).data = (unsigned char*)malloc(datasize);
if((*imgdata).data == NULL) return;
int pi = 0, ai = 0;
for(int di = 0; di < datasize;)
{
(*imgdata).data[di++] = pixdata[pi++];
(*imgdata).data[di++] = pixdata[pi++];
(*imgdata).data[di++] = pixdata[pi++];
(*imgdata).data[di++] = alphadata[ai++];
}
}
else
{
(*imgdata).width = 0;
(*imgdata).height = 0;
(*imgdata).data = NULL;
}
}