private bool FindUniforms(Dictionary <string, UniformValue> nameUniformDict, Dictionary <int, UniformValue> locationUniformDict)
{
nameUniformDict.Clear(); locationUniformDict.Clear();
int nextLoc = 0;
foreach (var shader in this.attachedShaders)
{
foreach (var item in shader.UniformVariableDict)
{
string varName = item.Key;
UniformVariable v = item.Value;
if (nameUniformDict.ContainsKey(varName))
{
if (v.fieldInfo.FieldType != nameUniformDict[varName].variable.fieldInfo.FieldType)
{
this.logInfo = string.Format("Different uniform variable types of the same name[{0}!]", varName);
return(false);
}
}
else
{
v.location = nextLoc;
int byteSize = this.GetByteSize(v.fieldInfo.FieldType);
nextLoc += byteSize;
var value = new UniformValue(v, null);
nameUniformDict.Add(varName, value);
locationUniformDict.Add(v.location, value);
}
}
}
return(true);
}
public UniformVariable GetUniformVariable(int location)
{
UniformValue v = null;
if (!this.locationUniformDict.TryGetValue(location, out v))
{
v = null;
}
return(v != null ? v.variable : null);
}
public int GetUniformLocation(string name)
{
int result = -1;
if (this.logInfo.Length > 0)
{
return(-1);
}
UniformValue v = null;
if (this.nameUniformDict.TryGetValue(name, out v))
{
result = (int)v.variable.location;
}
return(result);
}
internal void SetUniform(int location, Object value)
{
if (value == null)
{
return;
}
Dictionary <int, UniformValue> locationUniformDict = this.locationUniformDict;
UniformValue uniformValue = null;
if (locationUniformDict.TryGetValue(location, out uniformValue))
{
if (uniformValue.variable.fieldInfo.FieldType != value.GetType())
{
throw new ArgumentException("value");
}
uniformValue.value = value;
}
else
{
// TODO: what to do when specified uniform variable not exists? Silent or throwing exception?
}
}
private unsafe PassBuffer[] VertexShaderStage(int count, DrawElementsType type, IntPtr indices, VertexArrayObject vao, ShaderProgram program, GLBuffer indexBuffer)
{
PassBuffer[] passBuffers = null;
VertexShader vs = program.VertexShader; if (vs == null)
{
return(passBuffers);
}
// init pass-buffers to record output from vertex shader.
FieldInfo[] outFieldInfos = (from item in vs.outVariableDict select item.Value.fieldInfo).ToArray();
uint vertexCount = GetVertexCount(vao, indexBuffer, type);
//int vertexSize = GetVertexSize(outFieldInfos);
passBuffers = new PassBuffer[1 + outFieldInfos.Length];
void *[] pointers = new void *[1 + outFieldInfos.Length];
{
// the first pass-buffer stores gl_Position.
var passBuffer = new PassBuffer(PassType.Vec4, (int)vertexCount);
pointers[0] = (void *)passBuffer.Mapbuffer();
passBuffers[0] = passBuffer;
}
for (int i = 1; i < passBuffers.Length; i++)
{
var outField = outFieldInfos[i - 1];
PassType passType = outField.FieldType.GetPassType();
var passBuffer = new PassBuffer(passType, (int)vertexCount);
pointers[i] = (void *)passBuffer.Mapbuffer();
passBuffers[i] = passBuffer;
}
// execute vertex shader for each vertex.
byte[] indexData = indexBuffer.Data;
int indexLength = indexData.Length / ByteLength(type);
GCHandle pin = GCHandle.Alloc(indexData, GCHandleType.Pinned);
IntPtr pointer = pin.AddrOfPinnedObject();
var gl_VertexIDList = new List <uint>();
for (int indexID = indices.ToInt32() / ByteLength(type), c = 0; c < count && indexID < indexLength; indexID++, c++)
{
uint gl_VertexID = GetVertexID(pointer, type, indexID);
if (gl_VertexIDList.Contains(gl_VertexID))
{
continue;
}
else
{
gl_VertexIDList.Add(gl_VertexID);
}
var instance = vs.CreateCodeInstance() as VertexCodeBase; // an executable vertex shader.
instance.gl_VertexID = (int)gl_VertexID; // setup gl_VertexID.
// setup "in SomeType varName;" vertex attributes.
Dictionary <uint, VertexAttribDesc> locVertexAttribDict = vao.LocVertexAttribDict;
foreach (InVariable inVar in vs.inVariableDict.Values) // Dictionary<string, InVariable>.Values
{
VertexAttribDesc desc = null;
if (locVertexAttribDict.TryGetValue(inVar.location, out desc))
{
byte[] dataStore = desc.vbo.Data;
int byteIndex = desc.GetDataIndex(gl_VertexID);
VertexAttribType vertexAttribType = (VertexAttribType)desc.dataType;
object value = dataStore.ToStruct(inVar.fieldInfo.FieldType, byteIndex);
inVar.fieldInfo.SetValue(instance, value);
}
}
// setup "uniform SomeType varName;" in vertex shader.
Dictionary <string, UniformValue> nameUniformDict = program.nameUniformDict;
foreach (UniformVariable uniformVar in vs.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 vertex shader code.
// copy data to pass-buffer.
{
PassBuffer passBuffer = passBuffers[0];
var array = (vec4 *)pointers[0];
array[gl_VertexID] = instance.gl_Position;
}
for (int i = 1; i < passBuffers.Length; i++)
{
var outField = outFieldInfos[i - 1];
var obj = outField.GetValue(instance);
switch (outField.FieldType.GetPassType())
{
case PassType.Float: { var array = (float *)pointers[i]; array[gl_VertexID] = (float)obj; } break;
case PassType.Vec2: { var array = (vec2 *)pointers[i]; array[gl_VertexID] = (vec2)obj; } break;
case PassType.Vec3: { var array = (vec3 *)pointers[i]; array[gl_VertexID] = (vec3)obj; } break;
case PassType.Vec4: { var array = (vec4 *)pointers[i]; array[gl_VertexID] = (vec4)obj; } break;
case PassType.Mat2: { var array = (mat2 *)pointers[i]; array[gl_VertexID] = (mat2)obj; } break;
case PassType.Mat3: { var array = (mat3 *)pointers[i]; array[gl_VertexID] = (mat3)obj; } break;
case PassType.Mat4: { var array = (mat4 *)pointers[i]; array[gl_VertexID] = (mat4)obj; } break;
default:
throw new NotImplementedException();
}
// a general way to do this:
//var obj = outField.GetValue(instance);
//byte[] bytes = obj.ToBytes();
//PassBuffer passBuffer = passBuffers[i];
//var array = (byte*)passBuffer.AddrOfPinnedObject();
//for (int t = 0; t < bytes.Length; t++)
//{
// array[gl_VertexID * vertexSize + t] = bytes[t];
//}
}
}
pin.Free();
for (int i = 0; i < passBuffers.Length; i++)
{
passBuffers[i].Unmapbuffer();
}
return(passBuffers);
}
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;
}
}
}