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service/vi: Factor out scaling mode conversions from the IPC function itself 

Avoids entangling the IPC buffer appending with the actual operation of
converting the scaling values over. This also inserts the proper error
handling for invalid scaling values.
This commit is contained in:
Lioncash 2019-01-04 19:55:01 -05:00
parent 40aa1ea9f9
commit 56e51da1d9
1 changed files with 21 additions and 17 deletions
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32
src/core/hle/service/vi/vi.cpp
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@ -1102,31 +1102,35 @@ private:
void ConvertScalingMode(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
auto mode = rp.PopEnum<NintendoScaleMode>();
const auto mode = rp.PopEnum<NintendoScaleMode>();
LOG_DEBUG(Service_VI, "called mode={}", static_cast<u32>(mode));
const auto converted_mode = ConvertScalingModeImpl(mode);
if (converted_mode.Succeeded()) {
IPC::ResponseBuilder rb{ctx, 4};
rb.Push(RESULT_SUCCESS);
rb.PushEnum(*converted_mode);
} else {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(converted_mode.Code());
}
}
static ResultVal<ConvertedScaleMode> ConvertScalingModeImpl(NintendoScaleMode mode) {
switch (mode) {
case NintendoScaleMode::None:
rb.PushEnum(ConvertedScaleMode::None);
break;
return MakeResult(ConvertedScaleMode::None);
case NintendoScaleMode::Freeze:
rb.PushEnum(ConvertedScaleMode::Freeze);
break;
return MakeResult(ConvertedScaleMode::Freeze);
case NintendoScaleMode::ScaleToWindow:
rb.PushEnum(ConvertedScaleMode::ScaleToWindow);
break;
return MakeResult(ConvertedScaleMode::ScaleToWindow);
case NintendoScaleMode::Crop:
rb.PushEnum(ConvertedScaleMode::Crop);
break;
return MakeResult(ConvertedScaleMode::Crop);
case NintendoScaleMode::NoCrop:
rb.PushEnum(ConvertedScaleMode::NoCrop);
break;
return MakeResult(ConvertedScaleMode::NoCrop);
default:
UNIMPLEMENTED_MSG("Unknown scaling mode {}", static_cast<u32>(mode));
rb.PushEnum(ConvertedScaleMode::None);
break;
return ERR_OPERATION_FAILED;
}
}