private static bool IsHatY(SDLFeatureDescriptor feature)
{
return(feature.featureType == JoystickFeatureType.Hat &&
(feature.usageHint == (int)SDLAxisUsage.Hat0Y ||
feature.usageHint == (int)SDLAxisUsage.Hat1Y ||
feature.usageHint == (int)SDLAxisUsage.Hat2Y ||
feature.usageHint == (int)SDLAxisUsage.Hat3Y));
}
internal void BuildHatFeature(ref InputControlLayout.Builder builder, SDLFeatureDescriptor xFeature, SDLFeatureDescriptor yFeature)
{
string xFeatureName = SDLSupport.GetAxisNameFromUsage((SDLAxisUsage)xFeature.usageHint);
string yFeatureName = SDLSupport.GetAxisNameFromUsage((SDLAxisUsage)yFeature.usageHint);
var hat = HatNumber(xFeature);
var hatName = (hat > 1) ? $"Hat{hat}" : "Hat";
var control = builder.AddControl(hatName)
.WithLayout("Dpad")
.WithByteOffset((uint)xFeature.offset)
.WithSizeInBits((uint)xFeature.size * 8)
.WithUsages(new InternedString[] { CommonUsages.Hatswitch });
builder.AddControl(hatName + "/up")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("scale,scaleFactor=2147483647,clamp,clampMin=-1,clampMax=0,invert")
.WithByteOffset(4)
.WithSizeInBits((uint)yFeature.size * 8);
builder.AddControl(hatName + "/down")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("scale,scaleFactor=2147483647,clamp,clampMin=0,clampMax=1")
.WithByteOffset(4)
.WithSizeInBits((uint)yFeature.size * 8);
builder.AddControl(hatName + "/left")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("scale,scaleFactor=2147483647,clamp,clampMin=-1,clampMax=0,invert")
.WithByteOffset(0)
.WithSizeInBits((uint)xFeature.size * 8);
builder.AddControl(hatName + "/right")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("scale,scaleFactor=2147483647,clamp,clampMin=0,clampMax=1")
.WithByteOffset(0)
.WithSizeInBits((uint)xFeature.size * 8);
builder.AddControl(hatName + "/x")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Analog")
.WithParameters("scale,scaleFactor=2147483647,clamp,clampMin=0,clampMax=1")
.WithByteOffset(0)
.WithSizeInBits((uint)xFeature.size * 8);
builder.AddControl(hatName + "/y")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Analog")
.WithParameters("scale,scaleFactor=2147483647,clamp,clampMin=-1,clampMax=1,invert")
.WithByteOffset(4)
.WithSizeInBits((uint)yFeature.size * 8);
}
private static void BuildHatFeature(ref InputControlLayout.Builder builder, SDLFeatureDescriptor xFeature, SDLFeatureDescriptor yFeature)
{
Debug.Assert(xFeature.offset < yFeature.offset, "Order of features must be X followed by Y");
var hat = HatNumber(xFeature);
var hatName = hat > 1 ? $"Hat{hat}" : "Hat";
builder.AddControl(hatName)
.WithLayout("Dpad")
.WithByteOffset((uint)xFeature.offset)
.WithSizeInBits((uint)xFeature.size * 8)
.WithUsages(CommonUsages.Hatswitch);
builder.AddControl(hatName + "/up")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("scale,scaleFactor=2147483647,clamp,clampMin=-1,clampMax=0,invert")
.WithByteOffset(4)
.WithSizeInBits((uint)yFeature.size * 8);
builder.AddControl(hatName + "/down")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("scale,scaleFactor=2147483647,clamp,clampMin=0,clampMax=1")
.WithByteOffset(4)
.WithSizeInBits((uint)yFeature.size * 8);
builder.AddControl(hatName + "/left")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("scale,scaleFactor=2147483647,clamp,clampMin=-1,clampMax=0,invert")
.WithByteOffset(0)
.WithSizeInBits((uint)xFeature.size * 8);
builder.AddControl(hatName + "/right")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("scale,scaleFactor=2147483647,clamp,clampMin=0,clampMax=1")
.WithByteOffset(0)
.WithSizeInBits((uint)xFeature.size * 8);
}
internal bool IsAxisY(SDLFeatureDescriptor feature)
{
return(feature.featureType == JoystickFeatureType.Axis &&
feature.usageHint == (int)SDLAxisUsage.Y);
}
internal InputControlLayout Build()
{
var builder = new InputControlLayout.Builder
{
stateFormat = new FourCC('L', 'J', 'O', 'Y'),
extendsLayout = parentLayout
};
for (var i = 0; i < descriptor.controls.Count; i++)
{
SDLFeatureDescriptor feature = descriptor.controls[i];
switch (feature.featureType)
{
case JoystickFeatureType.Axis:
{
SDLAxisUsage usage = (SDLAxisUsage)feature.usageHint;
string featureName = SDLSupport.GetAxisNameFromUsage(usage);
string parameters = "scale,scaleFactor=65538,clamp,clampMin=-1,clampMax=1";
if (IsAxisX(feature) && i + 1 < descriptor.controls.Count)
{
SDLFeatureDescriptor nextFeature = descriptor.controls[i + 1];
if (IsAxisY(nextFeature))
{
BuildStickFeature(ref builder, feature, nextFeature);
}
}
if (IsAxisY(feature))
{
parameters += ",invert";
}
builder.AddControl(featureName)
.WithLayout("Analog")
.WithByteOffset((uint)feature.offset)
.WithFormat(InputStateBlock.kTypeInt)
.WithParameters(parameters);
}
break;
case JoystickFeatureType.Ball:
{
//TODO
}
break;
case JoystickFeatureType.Button:
{
SDLButtonUsage usage = (SDLButtonUsage)feature.usageHint;
string featureName = SDLSupport.GetButtonNameFromUsage(usage);
if (featureName != null)
{
builder.AddControl(featureName)
.WithLayout("Button")
.WithByteOffset((uint)feature.offset)
.WithBitOffset((uint)feature.bit)
.WithFormat(InputStateBlock.kTypeBit);
}
}
break;
case JoystickFeatureType.Hat:
{
SDLAxisUsage usage = (SDLAxisUsage)feature.usageHint;
string featureName = SDLSupport.GetAxisNameFromUsage(usage);
string parameters = "scale,scaleFactor=2147483647,clamp,clampMin=-1,clampMax=1";
if (i + 1 < descriptor.controls.Count)
{
SDLFeatureDescriptor nextFeature = descriptor.controls[i + 1];
if (IsHatY(nextFeature) && HatNumber(feature) == HatNumber(nextFeature))
{
BuildHatFeature(ref builder, feature, nextFeature);
}
}
if (IsHatY(feature))
{
parameters += ",invert";
}
builder.AddControl(featureName)
.WithLayout("Analog")
.WithByteOffset((uint)feature.offset)
.WithFormat(InputStateBlock.kTypeInt)
.WithParameters(parameters);
}
break;
default:
{
throw new NotImplementedException(String.Format("SDLLayoutBuilder.Build: Trying to build an SDL device with an unknown feature of type {0}.", feature.featureType));
}
}
}
return(builder.Build());
}
internal int HatNumber(SDLFeatureDescriptor feature)
{
Debug.Assert(feature.featureType == JoystickFeatureType.Hat);
return(1 + ((int)feature.usageHint - (int)SDLAxisUsage.Hat0X) / 2);
}
internal void BuildStickFeature(ref InputControlLayout.Builder builder, SDLFeatureDescriptor xFeature, SDLFeatureDescriptor yFeature)
{
int byteOffset;
if (xFeature.offset <= yFeature.offset)
{
byteOffset = xFeature.offset;
}
else
{
byteOffset = yFeature.offset;
}
var stickName = "Stick";
var control = builder.AddControl(stickName)
.WithLayout("Stick")
.WithByteOffset((uint)byteOffset)
.WithSizeInBits((uint)xFeature.size * 8)
.WithUsages(new InternedString[] { CommonUsages.Primary2DMotion });
builder.AddControl(stickName + "/x")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Axis")
.WithByteOffset(0)
.WithSizeInBits((uint)xFeature.size * 8)
.WithParameters("clamp,clampMin=-1,clampMax=1,scale,scaleFactor=65538");
builder.AddControl(stickName + "/y")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Axis")
.WithByteOffset((uint)4)
.WithSizeInBits((uint)xFeature.size * 8)
.WithParameters("clamp,clampMin=-1,clampMax=1,scale,scaleFactor=65538,invert");
//Need to handle Up/Down/Left/Right
builder.AddControl(stickName + "/up")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("clamp,clampMin=-1,clampMax=0,scale,scaleFactor=65538,invert")
.WithByteOffset((uint)4)
.WithSizeInBits((uint)yFeature.size * 8);
builder.AddControl(stickName + "/down")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("clamp,clampMin=0,clampMax=1,scale,scaleFactor=65538,invert=false")
.WithByteOffset((uint)4)
.WithSizeInBits((uint)yFeature.size * 8);
builder.AddControl(stickName + "/left")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("clamp,clampMin=-1,clampMax=0,scale,scaleFactor=65538,invert")
.WithByteOffset((uint)0)
.WithSizeInBits((uint)xFeature.size * 8);
builder.AddControl(stickName + "/right")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("clamp,clampMin=0,clampMax=1,scale,scaleFactor=65538")
.WithByteOffset((uint)0)
.WithSizeInBits((uint)xFeature.size * 8);
}
private static void BuildStickFeature(ref InputControlLayout.Builder builder, SDLFeatureDescriptor xFeature, SDLFeatureDescriptor yFeature)
{
int byteOffset;
if (xFeature.offset <= yFeature.offset)
{
byteOffset = xFeature.offset;
}
else
{
byteOffset = yFeature.offset;
}
const string stickName = "Stick";
builder.AddControl(stickName)
.WithLayout("Stick")
.WithByteOffset((uint)byteOffset)
.WithSizeInBits((uint)xFeature.size * 8)
.WithUsages(CommonUsages.Primary2DMotion);
builder.AddControl(stickName + "/x")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Axis")
.WithByteOffset(0)
.WithSizeInBits((uint)xFeature.size * 8)
.WithParameters("clamp,clampMin=-1,clampMax=1,scale,scaleFactor=65538");
builder.AddControl(stickName + "/y")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Axis")
.WithByteOffset(4)
.WithSizeInBits((uint)xFeature.size * 8)
.WithParameters("clamp,clampMin=-1,clampMax=1,scale,scaleFactor=65538,invert");
builder.AddControl(stickName + "/up")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("clamp,clampMin=-1,clampMax=0,scale,scaleFactor=65538,invert")
.WithByteOffset(4)
.WithSizeInBits((uint)yFeature.size * 8);
builder.AddControl(stickName + "/down")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("clamp,clampMin=0,clampMax=1,scale,scaleFactor=65538,invert=false")
.WithByteOffset(4)
.WithSizeInBits((uint)yFeature.size * 8);
builder.AddControl(stickName + "/left")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("clamp,clampMin=-1,clampMax=0,scale,scaleFactor=65538,invert")
.WithByteOffset(0)
.WithSizeInBits((uint)xFeature.size * 8);
builder.AddControl(stickName + "/right")
.WithFormat(InputStateBlock.kTypeInt)
.WithLayout("Button")
.WithParameters("clamp,clampMin=0,clampMax=1,scale,scaleFactor=65538")
.WithByteOffset(0)
.WithSizeInBits((uint)xFeature.size * 8);
}
private static bool IsAxis(SDLFeatureDescriptor feature, SDLAxisUsage axis)
{
return(feature.featureType == JoystickFeatureType.Axis &&
feature.usageHint == (int)axis);
}
