private string FindInVariables(Type vsType, Dictionary <string, InVariable> dict)
{
dict.Clear();
uint nextLoc = 0;
foreach (var item in vsType.GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.DeclaredOnly))
{
object[] attribute = item.GetCustomAttributes(typeof(InAttribute), false);
if (attribute != null && attribute.Length > 0) // this is a 'in ...;' field.
{
var v = new InVariable(item);
object[] locationAttribute = item.GetCustomAttributes(typeof(LocationAttribute), false);
if (locationAttribute != null && locationAttribute.Length > 0) // (location = ..) in ...;
{
uint loc = (locationAttribute[0] as LocationAttribute).location;
if (loc < nextLoc)
{
return(string.Format("location error in {0}!", this.GetType().Name));
}
v.location = loc;
nextLoc = loc + 1;
}
else
{
v.location = nextLoc++;
}
dict.Add(item.Name, v);
}
}
return(string.Empty);
}
/// <summary>
/// ex. Make sure vs.out and fs.in match.
/// </summary>
/// <returns></returns>
private bool MakeSureVariablesMatch()
{
if (this.VertexShader != null && this.FragmentShader != null)
{
Dictionary <string, OutVariable> outDict = this.VertexShader.outVariableDict;
Dictionary <string, InVariable> inDict = this.FragmentShader.inVariableDict;
if (outDict.Count != inDict.Count)
{
this.logInfo = string.Format("Variables number ({0} and {1}) not match!", outDict.Count, inDict.Count); return(false);
}
foreach (var outItem in outDict)
{
InVariable inVar = null;
if (inDict.TryGetValue(outItem.Key, out inVar))
{
if (inVar.fieldInfo.FieldType != outItem.Value.fieldInfo.FieldType)
{
this.logInfo = string.Format("Variable [{0}] not the same type!", outItem.Key);
return(false);
}
}
else
{
this.logInfo = string.Format("No variable matches [{0}] in {1}", outItem.Key, this.VertexShader.ShaderType);
return(false);
}
}
var list = new List <InVariable>();
foreach (var outItem in outDict)
{
var inVar = inDict[outItem.Key];
list.Add(inVar);
}
inDict.Clear();
foreach (var item in list)
{
inDict.Add(item.fieldInfo.Name, item);
}
}
return(true);
}
public int GetAttribLocation(string name)
{
int result = -1;
if (this.InfoLog.Length > 0)
{
return(result);
}
Dictionary <string, InVariable> dict = this.inVariableDict;
if (dict == null)
{
return(result);
}
InVariable v = null;
if (dict.TryGetValue(name, out v))
{
result = (int)v.location;
}
return(result);
}
private unsafe void FragmentShaderStage(ShaderProgram program, List <Fragment> fragmentList)
{
FragmentShader fs = program.FragmentShader; if (fs == null)
{
return;
}
foreach (var fragment in fragmentList)
{
var instance = fs.CreateCodeInstance() as FragmentCodeBase; // an executable fragment shader.
instance.gl_FragCoord = fragment.gl_FragCoord; // setup fragmen coordinatein window/screen space.
// setup "in SomeType varName;" vertex attributes.
InVariable[] inVariables = fs.inVariableDict.Values.ToArray();
if (inVariables.Length != fragment.attributes.Length)
{
throw new Exception("This should not happen!");
}
for (int index = 0; index < inVariables.Length; index++)
{
InVariable inVar = inVariables[index];
PassBuffer attribute = fragment.attributes[index];
var pointer = attribute.Mapbuffer().ToPointer();
switch (attribute.elementType)
{
case PassType.Float: inVar.fieldInfo.SetValue(instance, ((float *)pointer)[0]); break;
case PassType.Vec2: inVar.fieldInfo.SetValue(instance, ((vec2 *)pointer)[0]); break;
case PassType.Vec3: inVar.fieldInfo.SetValue(instance, ((vec3 *)pointer)[0]); break;
case PassType.Vec4: inVar.fieldInfo.SetValue(instance, ((vec4 *)pointer)[0]); break;
case PassType.Mat2: inVar.fieldInfo.SetValue(instance, ((mat2 *)pointer)[0]); break;
case PassType.Mat3: inVar.fieldInfo.SetValue(instance, ((mat3 *)pointer)[0]); break;
case PassType.Mat4: inVar.fieldInfo.SetValue(instance, ((mat4 *)pointer)[0]); break;
default: throw new NotDealWithNewEnumItemException(typeof(PassType));
}
attribute.Unmapbuffer();
}
// setup "uniform SomeType varName;" in fragment shader.
Dictionary <string, UniformValue> nameUniformDict = program.nameUniformDict;
foreach (UniformVariable uniformVar in fs.UniformVariableDict.Values)
{
string name = uniformVar.fieldInfo.Name;
UniformValue obj = null;
if (nameUniformDict.TryGetValue(name, out obj))
{
if (obj.value != null)
{
uniformVar.fieldInfo.SetValue(instance, obj.value);
}
}
}
instance.main(); // execute fragment shader code.
fragment.discard = instance.discard;
if (!instance.discard) // if this fragment is not discarded.
{
OutVariable[] outVariables = fs.outVariableDict.Values.ToArray();
var outBuffers = new PassBuffer[outVariables.Length];
for (int index = 0; index < outVariables.Length; index++)
{
OutVariable outVar = outVariables[index];
var outBuffer = new PassBuffer(outVar.fieldInfo.FieldType.GetPassType(), 1);
var pointer = outBuffer.Mapbuffer().ToPointer();
switch (outBuffer.elementType)
{
case PassType.Float: ((float *)pointer)[0] = (float)outVar.fieldInfo.GetValue(instance); break;
case PassType.Vec2: ((vec2 *)pointer)[0] = (vec2)outVar.fieldInfo.GetValue(instance); break;
case PassType.Vec3: ((vec3 *)pointer)[0] = (vec3)outVar.fieldInfo.GetValue(instance); break;
case PassType.Vec4: ((vec4 *)pointer)[0] = (vec4)outVar.fieldInfo.GetValue(instance); break;
case PassType.Mat2: ((mat2 *)pointer)[0] = (mat2)outVar.fieldInfo.GetValue(instance); break;
case PassType.Mat3: ((mat3 *)pointer)[0] = (mat3)outVar.fieldInfo.GetValue(instance); break;
case PassType.Mat4: ((mat4 *)pointer)[0] = (mat4)outVar.fieldInfo.GetValue(instance); break;
default: throw new NotDealWithNewEnumItemException(typeof(PassType));
}
outBuffer.Unmapbuffer();
outBuffers[index] = outBuffer;
}
fragment.outVariables = outBuffers;
}
}
}
