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add a parameter check

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cnjinhao 2015-01-29 07:12:06 +08:00
parent e0259e6254
commit 7c93980530
1 changed files with 3 additions and 1 deletions
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4
source/gui/programming_interface.cpp
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@ -97,7 +97,9 @@ namespace API
}
void effects_bground(window wd, const effects::bground_factory_interface& factory, double fade_rate)
{
{
if (fade_rate < 0.0 || fade_rate > 1.0)
throw std::invalid_argument("effects_bground: value range of fade_rate must be [0, 1].");
auto const iwd = reinterpret_cast<restrict::core_window_t*>(wd);
internal_scope_guard isg;
if(restrict::window_manager.available(iwd))