/// <summary>
/// Inserts the data in the list if this is a copy of a previously set one.
/// </summary>
/// <param name="data">The data.</param>
/// <param name="index">The index in the list.</param>
/// <param name="bindings">The list of bindings.</param>
/// <returns>The new index of the data.</returns>
private static int GetReflexionIndex(EffectResourceBindingDescription data, int index, List<EffectResourceBindingDescription> bindings)
{
if (data.SlotCount != 0)
{
// slot count has been specified, this means that this resource was already configured
// We have to create a new entry for the data
var newIndex = bindings.Count;
bindings.Add(data);
return newIndex;
}
return index;
}
/// <summary>
/// Create or updates the reflection for this shader
/// </summary>
/// <param name="effectReflection">the reflection from the hlsl</param>
/// <param name="stage">the shader pipeline stage</param>
private void CreateReflection(EffectReflection effectReflection, ShaderStage stage)
{
int currentProgram;
GL.GetInteger(GetPName.CurrentProgram, out currentProgram);
GL.UseProgram(ProgramId);
int uniformBlockCount;
GL.GetProgram(ProgramId, XkActiveUniformBlocks, out uniformBlockCount);
var validConstantBuffers = new bool[effectReflection.ConstantBuffers.Count];
for (int uniformBlockIndex = 0; uniformBlockIndex < uniformBlockCount; ++uniformBlockIndex)
{
// TODO: get previous name to find te actual constant buffer in the reflexion
#if SILICONSTUDIO_XENKO_GRAPHICS_API_OPENGLES
const int sbCapacity = 128;
int length;
var sb = new StringBuilder(sbCapacity);
GL.GetActiveUniformBlockName(ProgramId, uniformBlockIndex, sbCapacity, out length, sb);
var constantBufferName = sb.ToString();
#else
var constantBufferName = GL.GetActiveUniformBlockName(ProgramId, uniformBlockIndex);
#endif
var constantBufferDescriptionIndex = effectReflection.ConstantBuffers.FindIndex(x => x.Name == constantBufferName);
if (constantBufferDescriptionIndex == -1)
{
reflectionResult.Error("Unable to find the constant buffer description [{0}]", constantBufferName);
return;
}
var constantBufferIndex = effectReflection.ResourceBindings.FindIndex(x => x.RawName == constantBufferName);
if (constantBufferIndex == -1)
{
reflectionResult.Error("Unable to find the constant buffer [{0}]", constantBufferName);
return;
}
var constantBufferDescription = effectReflection.ConstantBuffers[constantBufferDescriptionIndex];
var constantBuffer = effectReflection.ResourceBindings[constantBufferIndex];
GL.GetActiveUniformBlock(ProgramId, uniformBlockIndex, ActiveUniformBlockParameter.UniformBlockDataSize, out constantBufferDescription.Size);
int uniformCount;
GL.GetActiveUniformBlock(ProgramId, uniformBlockIndex, ActiveUniformBlockParameter.UniformBlockActiveUniforms, out uniformCount);
// set the binding
GL.UniformBlockBinding(ProgramId, uniformBlockIndex, uniformBlockIndex);
// Read uniforms desc
var uniformIndices = new int[uniformCount];
var uniformOffsets = new int[uniformCount];
var uniformTypes = new int[uniformCount];
var uniformNames = new string[uniformCount];
GL.GetActiveUniformBlock(ProgramId, uniformBlockIndex, ActiveUniformBlockParameter.UniformBlockActiveUniformIndices, uniformIndices);
GL.GetActiveUniforms(ProgramId, uniformIndices.Length, uniformIndices, ActiveUniformParameter.UniformOffset, uniformOffsets);
GL.GetActiveUniforms(ProgramId, uniformIndices.Length, uniformIndices, ActiveUniformParameter.UniformType, uniformTypes);
for (int uniformIndex = 0; uniformIndex < uniformIndices.Length; ++uniformIndex)
{
#if SILICONSTUDIO_XENKO_GRAPHICS_API_OPENGLES
int size;
ActiveUniformType aut;
GL.GetActiveUniform(ProgramId, uniformIndices[uniformIndex], sbCapacity, out length, out size, out aut, sb);
uniformNames[uniformIndex] = sb.ToString();
#else
uniformNames[uniformIndex] = GL.GetActiveUniformName(ProgramId, uniformIndices[uniformIndex]);
#endif
}
// Reoder by offset
var indexMapping = uniformIndices.Select((x, i) => new UniformMergeInfo { Offset = uniformOffsets[i], Type = (ActiveUniformType)uniformTypes[i], Name = uniformNames[i], NextOffset = 0 }).OrderBy(x => x.Offset).ToArray();
indexMapping.Last().NextOffset = constantBufferDescription.Size;
// Fill next offsets
for (int i = 1; i < indexMapping.Length; ++i)
{
indexMapping[i - 1].NextOffset = indexMapping[i].Offset;
}
// Group arrays/structures into one variable (std140 layout is enough for offset determinism inside arrays/structures)
indexMapping = indexMapping.GroupBy(x =>
{
// Use only first part of name (ignore structure/array part)
var name = x.Name;
if (name.Contains(".")) { name = name.Substring(0, name.IndexOf('.')); }
if (name.Contains("[")) { name = name.Substring(0, name.IndexOf('[')); }
return name;
})
.Select(x =>
{
var result = x.First();
result.NextOffset = x.Last().NextOffset;
// Check weither it's an array or a struct
int dotIndex = result.Name.IndexOf('.');
int arrayIndex = result.Name.IndexOf('[');
if (x.Count() > 1 && arrayIndex == -1 && dotIndex == -1)
throw new InvalidOperationException();
// TODO: Type processing
result.Name = x.Key;
return result;
}).ToArray();
foreach (var variableIndexGroup in indexMapping)
{
var variableIndex = -1;
for (var tentativeIndex = 0; tentativeIndex < constantBufferDescription.Members.Length; ++tentativeIndex)
{
if (constantBufferDescription.Members[tentativeIndex].RawName == variableIndexGroup.Name)
{
variableIndex = tentativeIndex;
break;
}
}
if (variableIndex == -1)
{
reflectionResult.Error("Unable to find uniform [{0}] in constant buffer [{1}]", variableIndexGroup.Name, constantBufferName);
continue;
}
var variable = constantBufferDescription.Members[variableIndex];
variable.Type.Type = GetTypeFromActiveUniformType(variableIndexGroup.Type);
variable.Offset = variableIndexGroup.Offset;
variable.Size = variableIndexGroup.NextOffset - variableIndexGroup.Offset;
constantBufferDescription.Members[variableIndex] = variable;
}
constantBufferDescription.Type = ConstantBufferType.ConstantBuffer;
constantBuffer.SlotCount = 1; // constant buffers are not arrays
constantBuffer.SlotStart = uniformBlockIndex;
constantBuffer.Stage = stage;
// store the new values
validConstantBuffers[constantBufferDescriptionIndex] = true;
effectReflection.ConstantBuffers[constantBufferDescriptionIndex] = constantBufferDescription;
effectReflection.ResourceBindings[constantBufferIndex] = constantBuffer;
}
//#endif
// Remove unecessary cbuffer and resource bindings
// Register textures, samplers, etc...
//TODO: (?) non texture/buffer uniform outside of a block
{
// Register "NoSampler", required by HLSL=>GLSL translation to support HLSL such as texture.Load().
var noSampler = new EffectResourceBindingDescription { KeyInfo = { KeyName = "NoSampler" }, RawName = "NoSampler", Class = EffectParameterClass.Sampler, SlotStart = -1, SlotCount = 1 };
Reflection.ResourceBindings.Add(noSampler);
int activeUniformCount;
GL.GetProgram(ProgramId, GetProgramParameterName.ActiveUniforms, out activeUniformCount);
#if !SILICONSTUDIO_XENKO_GRAPHICS_API_OPENGLES
var uniformTypes = new int[activeUniformCount];
GL.GetActiveUniforms(ProgramId, activeUniformCount, Enumerable.Range(0, activeUniformCount).ToArray(), ActiveUniformParameter.UniformType, uniformTypes);
#endif
int textureUnitCount = 0;
const int sbCapacity = 128;
var sb = new StringBuilder(sbCapacity);
for (int activeUniformIndex = 0; activeUniformIndex < activeUniformCount; ++activeUniformIndex)
{
#if !SILICONSTUDIO_XENKO_GRAPHICS_API_OPENGLES
var uniformType = (ActiveUniformType)uniformTypes[activeUniformIndex];
var uniformName = GL.GetActiveUniformName(ProgramId, activeUniformIndex);
#else
ActiveUniformType uniformType;
int uniformCount;
int length;
GL.GetActiveUniform(ProgramId, activeUniformIndex, sbCapacity, out length, out uniformCount, out uniformType, sb);
var uniformName = sb.ToString();
//this is a special OpenglES case , it is declared as built in uniform, and the driver will take care of it, we just need to ignore it here
if (uniformName.StartsWith("gl_DepthRange"))
{
continue;
}
#endif
#if SILICONSTUDIO_XENKO_GRAPHICS_API_OPENGLES
// Process uniforms
if (GraphicsDevice.IsOpenGLES2)
{
switch (uniformType)
{
case ActiveUniformType.Bool:
case ActiveUniformType.Int:
AddUniform(effectReflection, validConstantBuffers, sizeof(int)*1, uniformCount, uniformName, uniformType);
break;
case ActiveUniformType.BoolVec2:
case ActiveUniformType.IntVec2:
AddUniform(effectReflection, validConstantBuffers, sizeof(int)*2, uniformCount, uniformName, uniformType);
break;
case ActiveUniformType.BoolVec3:
case ActiveUniformType.IntVec3:
AddUniform(effectReflection, validConstantBuffers, sizeof(int)*3, uniformCount, uniformName, uniformType);
break;
case ActiveUniformType.BoolVec4:
case ActiveUniformType.IntVec4:
AddUniform(effectReflection, validConstantBuffers, sizeof(int)*4, uniformCount, uniformName, uniformType);
break;
case ActiveUniformType.Float:
AddUniform(effectReflection, validConstantBuffers, sizeof(float)*1, uniformCount, uniformName, uniformType);
break;
case ActiveUniformType.FloatVec2:
AddUniform(effectReflection, validConstantBuffers, sizeof(float)*2, uniformCount, uniformName, uniformType);
break;
case ActiveUniformType.FloatVec3:
AddUniform(effectReflection, validConstantBuffers, sizeof(float)*3, uniformCount, uniformName, uniformType);
break;
case ActiveUniformType.FloatVec4:
AddUniform(effectReflection, validConstantBuffers, sizeof(float)*4, uniformCount, uniformName, uniformType);
break;
case ActiveUniformType.FloatMat4:
AddUniform(effectReflection, validConstantBuffers, sizeof(float)*4*4, uniformCount, uniformName, uniformType);
break;
case ActiveUniformType.FloatMat2:
case ActiveUniformType.FloatMat3:
throw new NotImplementedException();
}
}
#endif
switch (uniformType)
{
#if !SILICONSTUDIO_XENKO_GRAPHICS_API_OPENGLES
case ActiveUniformType.Sampler1D:
case ActiveUniformType.Sampler1DShadow:
case ActiveUniformType.IntSampler1D:
case ActiveUniformType.UnsignedIntSampler1D:
case ActiveUniformType.SamplerBuffer:
case ActiveUniformType.UnsignedIntSamplerBuffer:
case ActiveUniformType.IntSamplerBuffer:
#endif
case ActiveUniformType.Sampler2D:
case ActiveUniformType.Sampler2DShadow:
case ActiveUniformType.Sampler3D: // TODO: remove Texture3D that is not available in OpenGL ES 2
case ActiveUniformType.SamplerCube:
case ActiveUniformType.IntSampler2D:
case ActiveUniformType.IntSampler3D:
case ActiveUniformType.IntSamplerCube:
case ActiveUniformType.UnsignedIntSampler2D:
case ActiveUniformType.UnsignedIntSampler3D:
case ActiveUniformType.UnsignedIntSamplerCube:
var uniformIndex = GL.GetUniformLocation(ProgramId, uniformName);
// Temporary way to scan which texture and sampler created this texture_sampler variable (to fix with new HLSL2GLSL converter)
var startIndex = -1;
var textureReflectionIndex = -1;
var samplerReflectionIndex = -1;
do
{
int middlePart = uniformName.IndexOf('_', startIndex + 1);
var textureName = middlePart != -1 ? uniformName.Substring(0, middlePart) : uniformName;
var samplerName = middlePart != -1 ? uniformName.Substring(middlePart + 1) : null;
textureReflectionIndex =
effectReflection.ResourceBindings.FindIndex(x => x.RawName == textureName);
samplerReflectionIndex =
effectReflection.ResourceBindings.FindIndex(x => x.RawName == samplerName);
if (textureReflectionIndex != -1 && samplerReflectionIndex != -1)
break;
startIndex = middlePart;
} while (startIndex != -1);
if (startIndex == -1 || textureReflectionIndex == -1 || samplerReflectionIndex == -1)
{
reflectionResult.Error("Unable to find sampler and texture corresponding to [{0}]", uniformName);
continue; // Error
}
var textureReflection = effectReflection.ResourceBindings[textureReflectionIndex];
var samplerReflection = effectReflection.ResourceBindings[samplerReflectionIndex];
// Contrary to Direct3D, samplers and textures are part of the same object in OpenGL
// Since we are exposing the Direct3D representation, a single sampler parameter key can be used for several textures, a single texture can be used with several samplers.
// When such a case is detected, we need to duplicate the resource binding.
textureReflectionIndex = GetReflexionIndex(textureReflection, textureReflectionIndex, effectReflection.ResourceBindings);
samplerReflectionIndex = GetReflexionIndex(samplerReflection, samplerReflectionIndex, effectReflection.ResourceBindings);
// Update texture uniform mapping
GL.Uniform1(uniformIndex, textureUnitCount);
textureReflection.Stage = stage;
//textureReflection.Param.RawName = uniformName;
textureReflection.Type = GetTypeFromActiveUniformType(uniformType);
textureReflection.Class = EffectParameterClass.ShaderResourceView;
textureReflection.SlotStart = textureUnitCount;
textureReflection.SlotCount = 1; // TODO: texture arrays
samplerReflection.Stage = stage;
samplerReflection.Class = EffectParameterClass.Sampler;
samplerReflection.SlotStart = textureUnitCount;
samplerReflection.SlotCount = 1; // TODO: texture arrays
effectReflection.ResourceBindings[textureReflectionIndex] = textureReflection;
effectReflection.ResourceBindings[samplerReflectionIndex] = samplerReflection;
Textures.Add(new Texture(textureUnitCount));
textureUnitCount++;
break;
}
}
// Remove any optimized resource binding
effectReflection.ResourceBindings.RemoveAll(x => x.SlotStart == -1);
effectReflection.ConstantBuffers = effectReflection.ConstantBuffers.Where((cb, i) => validConstantBuffers[i]).ToList();
}
GL.UseProgram(currentProgram);
}