本文整理汇总了C++中wxImage::SetMaskColour方法的典型用法代码示例。如果您正苦于以下问题：C++ wxImage::SetMaskColour方法的具体用法？C++ wxImage::SetMaskColour怎么用？C++ wxImage::SetMaskColour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::SetMaskColour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: ScaleImage
wxImage ScaleImage(wxImage image, double source_scale_factor, double content_scale_factor,
wxSize output_size, wxRect usable_rect, LSIFlags flags,
const wxColour& fill_color)
{
if (!image.IsOk())
{
wxFAIL_MSG("WxUtils::ScaleImage expects a valid image.");
return image;
}
if (content_scale_factor != 1.0)
{
output_size *= content_scale_factor;
usable_rect.SetPosition(usable_rect.GetPosition() * content_scale_factor);
usable_rect.SetSize(usable_rect.GetSize() * content_scale_factor);
}
// Fix the output size if it's unset.
wxSize img_size = image.GetSize();
if (output_size.GetWidth() < 1)
output_size.SetWidth(
static_cast<int>(img_size.GetWidth() * (content_scale_factor / source_scale_factor)));
if (output_size.GetHeight() < 1)
output_size.SetHeight(
static_cast<int>(img_size.GetHeight() * (content_scale_factor / source_scale_factor)));
// Fix the usable rect. If it's empty then the whole canvas is usable.
if (usable_rect.IsEmpty())
{
// Constructs a temp wxRect 0,0->output_size then move assigns it.
usable_rect = output_size;
}
else if (!usable_rect.Intersects(output_size))
{
wxFAIL_MSG("Usable Zone Rectangle is not inside the canvas. Check the output size is correct.");
image.Create(1, 1, false);
image.SetRGB(0, 0, fill_color.Red(), fill_color.Green(), fill_color.Blue());
if (fill_color.Alpha() == wxALPHA_TRANSPARENT)
image.SetMaskColour(fill_color.Red(), fill_color.Green(), fill_color.Blue());
usable_rect = output_size;
}
// Step 1: Scale the image
if ((flags & LSI_SCALE) != LSI_SCALE_NONE)
{
if (flags & LSI_SCALE_NO_ASPECT)
{
// Stretch scale without preserving the aspect ratio.
bool scale_width = (img_size.GetWidth() > usable_rect.GetWidth() && flags & LSI_SCALE_DOWN) ||
(img_size.GetWidth() < usable_rect.GetWidth() && flags & LSI_SCALE_UP);
bool scale_height =
(img_size.GetHeight() > usable_rect.GetHeight() && flags & LSI_SCALE_DOWN) ||
(img_size.GetHeight() < usable_rect.GetHeight() && flags & LSI_SCALE_UP);
if (scale_width || scale_height)
{
// NOTE: Using BICUBIC instead of HIGH because it's the same internally
// except that downscaling uses a box filter with awful obvious aliasing
// for non-integral scale factors.
image.Rescale(scale_width ? usable_rect.GetWidth() : img_size.GetWidth(),
scale_height ? usable_rect.GetHeight() : img_size.GetHeight(),
wxIMAGE_QUALITY_BICUBIC);
}
}
else
{
// Scale while preserving the aspect ratio.
double scale = std::min(static_cast<double>(usable_rect.GetWidth()) / img_size.GetWidth(),
static_cast<double>(usable_rect.GetHeight()) / img_size.GetHeight());
int target_width = static_cast<int>(img_size.GetWidth() * scale);
int target_height = static_cast<int>(img_size.GetHeight() * scale);
// Bilinear produces sharper images when upscaling, bicubic tends to smear/blur sharp edges.
if (scale > 1.0 && flags & LSI_SCALE_UP)
image.Rescale(target_width, target_height, wxIMAGE_QUALITY_BILINEAR);
else if (scale < 1.0 && flags & LSI_SCALE_DOWN)
image.Rescale(target_width, target_height, wxIMAGE_QUALITY_BICUBIC);
}
img_size = image.GetSize();
}
// Step 2: Resize the canvas to match the output size.
// NOTE: If NOT using LSI_SCALE_DOWN then this will implicitly crop the image
if (img_size != output_size || usable_rect.GetPosition() != wxPoint())
{
wxPoint base = usable_rect.GetPosition();
if (flags & LSI_ALIGN_HCENTER)
base.x += (usable_rect.GetWidth() - img_size.GetWidth()) / 2;
else if (flags & LSI_ALIGN_RIGHT)
base.x += usable_rect.GetWidth() - img_size.GetWidth();
if (flags & LSI_ALIGN_VCENTER)
base.y += (usable_rect.GetHeight() - img_size.GetHeight()) / 2;
else if (flags & LSI_ALIGN_BOTTOM)
base.y += usable_rect.GetHeight() - img_size.GetHeight();
int r = -1, g = -1, b = -1;
if (fill_color.Alpha() != wxALPHA_TRANSPARENT)
{
r = fill_color.Red();
g = fill_color.Green();
b = fill_color.Blue();
}
//.........这里部分代码省略.........