internal override ShaderData CreateShader(
ShaderResult shaderResult, string shaderFunction, string shaderProfile,
bool isVertexShader, EffectObject effect, ref string errorsAndWarnings)
{
// For now GLSL is only supported via translation
// using MojoShader which works from HLSL bytecode.
var bytecode = EffectObject.CompileHLSL(
shaderResult, shaderFunction, shaderProfile, ref errorsAndWarnings);
// First look to see if we already created this same shader.
foreach (var shader in effect.Shaders)
{
if (bytecode.SequenceEqual(shader.Bytecode))
{
return(shader);
}
}
var shaderInfo = shaderResult.ShaderInfo;
var shaderData = ShaderData.CreateGLSL(
bytecode, isVertexShader, effect.ConstantBuffers,
effect.Shaders.Count, shaderInfo.SamplerStates, shaderResult.Debug);
effect.Shaders.Add(shaderData);
return(shaderData);
}
public static ShaderData CreateHLSL(
byte[] byteCode,
bool isVertexShader,
List <ConstantBufferData> cbuffers,
int sharedIndex,
Dictionary <string, SamplerStateInfo> samplerStates,
bool debug)
{
var dxshader = new ShaderData(isVertexShader, sharedIndex, byteCode)
{
_attributes = System.Array.Empty <Attribute>()
};
// Strip the bytecode we're gonna save!
var stripFlags = SharpDX.D3DCompiler.StripFlags.CompilerStripReflectionData |
SharpDX.D3DCompiler.StripFlags.CompilerStripTestBlobs;
if (!debug)
{
stripFlags |= SharpDX.D3DCompiler.StripFlags.CompilerStripDebugInformation;
}
using (var original = new SharpDX.D3DCompiler.ShaderBytecode(byteCode))
{
// Strip the bytecode for saving to disk.
var stripped = original.Strip(stripFlags);
{
// Only SM4 and above works with strip... so this can return null!
if (stripped != null)
{
dxshader.ShaderCode = stripped;
}
else
{
// TODO: There is a way to strip SM3 and below
// but we have to write the method ourselves.
//
// If we need to support it then consider porting
// this code over...
//
// http://entland.homelinux.com/blog/2009/01/15/stripping-comments-from-shader-bytecodes/
//
dxshader.ShaderCode = (byte[])dxshader.Bytecode.Clone();
}
}
// Use reflection to get details of the shader.
using (var refelect = new SharpDX.D3DCompiler.ShaderReflection(byteCode))
{
// Get the samplers.
var samplers = new List <Sampler>();
for (var i = 0; i < refelect.Description.BoundResources; i++)
{
var rdesc = refelect.GetResourceBindingDescription(i);
if (rdesc.Type == SharpDX.D3DCompiler.ShaderInputType.Texture)
{
var samplerName = rdesc.Name;
var sampler = new Sampler
{
samplerName = string.Empty,
textureSlot = rdesc.BindPoint,
samplerSlot = rdesc.BindPoint,
parameterName = samplerName
};
if (samplerStates.TryGetValue(samplerName, out SamplerStateInfo? state))
{
sampler.parameterName = state.TextureName ?? samplerName;
sampler.state = state.State;
}
else
{
foreach (var s in samplerStates.Values)
{
if (samplerName == s.TextureName)
{
sampler.state = s.State;
samplerName = s.Name;
break;
}
}
}
// Find sampler slot, which can be different from the texture slot.
for (int j = 0; j < refelect.Description.BoundResources; j++)
{
var samplerrdesc = refelect.GetResourceBindingDescription(j);
if (samplerrdesc.Type == SharpDX.D3DCompiler.ShaderInputType.Sampler &&
samplerrdesc.Name == samplerName)
{
sampler.samplerSlot = samplerrdesc.BindPoint;
break;
}
}
switch (rdesc.Dimension)
{
case ShaderResourceViewDimension.Texture1D:
case ShaderResourceViewDimension.Texture1DArray:
sampler.type = MojoShader.MOJOSHADER_samplerType.MOJOSHADER_SAMPLER_1D;
break;
case ShaderResourceViewDimension.Texture2D:
case ShaderResourceViewDimension.Texture2DArray:
case ShaderResourceViewDimension.Texture2DMultisampled:
case ShaderResourceViewDimension.Texture2DMultisampledArray:
sampler.type = MojoShader.MOJOSHADER_samplerType.MOJOSHADER_SAMPLER_2D;
break;
case ShaderResourceViewDimension.Texture3D:
sampler.type = MojoShader.MOJOSHADER_samplerType.MOJOSHADER_SAMPLER_VOLUME;
break;
case ShaderResourceViewDimension.TextureCube:
case ShaderResourceViewDimension.TextureCubeArray:
sampler.type = MojoShader.MOJOSHADER_samplerType.MOJOSHADER_SAMPLER_CUBE;
break;
}
samplers.Add(sampler);
}
}
dxshader._samplers = samplers.ToArray();
// Gather all the constant buffers used by this shader.
dxshader._cbuffers = new int[refelect.Description.ConstantBuffers];
for (var i = 0; i < refelect.Description.ConstantBuffers; i++)
{
var cb = new ConstantBufferData(refelect.GetConstantBuffer(i));
// Look for a duplicate cbuffer in the list.
for (var c = 0; c < cbuffers.Count; c++)
{
if (cb.SameAs(cbuffers[c]))
{
cb = null;
dxshader._cbuffers[i] = c;
break;
}
}
// Add a new cbuffer.
if (cb != null)
{
dxshader._cbuffers[i] = cbuffers.Count;
cbuffers.Add(cb);
}
}
}
}
return(dxshader);
}
public static ShaderData CreateGLSL(byte[] byteCode, bool isVertexShader, List <ConstantBufferData> cbuffers, int sharedIndex, Dictionary <string, SamplerStateInfo> samplerStates, bool debug)
{
var dxshader = new ShaderData(isVertexShader, sharedIndex, byteCode);
// Use MojoShader to convert the HLSL bytecode to GLSL.
var parseDataPtr = MojoShader.NativeMethods.MOJOSHADER_parse(
"glsl",
byteCode,
byteCode.Length,
IntPtr.Zero,
0,
IntPtr.Zero,
0,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero);
var parseData = MarshalHelper.Unmarshal <MojoShader.MOJOSHADER_parseData> (parseDataPtr);
if (parseData.error_count > 0)
{
var errors = MarshalHelper.UnmarshalArray <MojoShader.MOJOSHADER_error> (
parseData.errors,
parseData.error_count
);
throw new Exception(errors [0].error);
}
// Conver the attributes.
//
// TODO: Could this be done using DX shader reflection?
//
{
var attributes = MarshalHelper.UnmarshalArray <MojoShader.MOJOSHADER_attribute> (
parseData.attributes, parseData.attribute_count);
dxshader._attributes = new Attribute[attributes.Length];
for (var i = 0; i < attributes.Length; i++)
{
dxshader._attributes [i].name = attributes [i].name;
dxshader._attributes [i].index = attributes [i].index;
dxshader._attributes [i].usage = EffectObject.ToXNAVertexElementUsage(attributes [i].usage);
}
}
var symbols = MarshalHelper.UnmarshalArray <MojoShader.MOJOSHADER_symbol> (
parseData.symbols, parseData.symbol_count);
//try to put the symbols in the order they are eventually packed into the uniform arrays
//this /should/ be done by pulling the info from mojoshader
Array.Sort(symbols, delegate(MojoShader.MOJOSHADER_symbol a, MojoShader.MOJOSHADER_symbol b) {
uint va = a.register_index;
if (a.info.elements == 1)
{
va += 1024; //hax. mojoshader puts array objects first
}
uint vb = b.register_index;
if (b.info.elements == 1)
{
vb += 1024;
}
return(va.CompareTo(vb));
}
); //(a, b) => ((int)(a.info.elements > 1))a.register_index.CompareTo(b.register_index));
// NOTE: It seems the latest versions of MojoShader only
// output vec4 register sets. We leave the code below, but
// the runtime has been optimized for this case.
// For whatever reason the register indexing is
// incorrect from MojoShader.
{
uint bool_index = 0;
uint float4_index = 0;
uint int4_index = 0;
for (var i = 0; i < symbols.Length; i++)
{
switch (symbols [i].register_set)
{
case MojoShader.MOJOSHADER_symbolRegisterSet.MOJOSHADER_SYMREGSET_BOOL:
symbols [i].register_index = bool_index;
bool_index += symbols [i].register_count;
break;
case MojoShader.MOJOSHADER_symbolRegisterSet.MOJOSHADER_SYMREGSET_FLOAT4:
symbols [i].register_index = float4_index;
float4_index += symbols[i].register_count;
break;
case MojoShader.MOJOSHADER_symbolRegisterSet.MOJOSHADER_SYMREGSET_INT4:
symbols [i].register_index = int4_index;
int4_index += symbols [i].register_count;
break;
}
}
}
// Get the samplers.
var samplers = MarshalHelper.UnmarshalArray <MojoShader.MOJOSHADER_sampler> (
parseData.samplers, parseData.sampler_count);
dxshader._samplers = new Sampler[samplers.Length];
for (var i = 0; i < samplers.Length; i++)
{
// We need the original sampler name... look for that in the symbols.
var originalSamplerName =
symbols.First(e => e.register_set == MojoShader.MOJOSHADER_symbolRegisterSet.MOJOSHADER_SYMREGSET_SAMPLER &&
e.register_index == samplers[i].index
).name;
var sampler = new Sampler
{
//sampler mapping to parameter is unknown atm
parameter = -1,
// GLSL needs the MojoShader mangled sampler name.
samplerName = samplers[i].name,
// By default use the original sampler name for the parameter name.
parameterName = originalSamplerName,
textureSlot = samplers[i].index,
samplerSlot = samplers[i].index,
type = samplers[i].type,
};
SamplerStateInfo state;
if (samplerStates.TryGetValue(originalSamplerName, out state))
{
sampler.state = state.State;
sampler.parameterName = state.TextureName ?? originalSamplerName;
}
// Store the sampler.
dxshader._samplers[i] = sampler;
}
// Gather all the parameters used by this shader.
var symbol_types = new [] {
new { name = dxshader.IsVertexShader ? "vs_uniforms_bool" : "ps_uniforms_bool", set = MojoShader.MOJOSHADER_symbolRegisterSet.MOJOSHADER_SYMREGSET_BOOL, },
new { name = dxshader.IsVertexShader ? "vs_uniforms_ivec4" : "ps_uniforms_ivec4", set = MojoShader.MOJOSHADER_symbolRegisterSet.MOJOSHADER_SYMREGSET_INT4, },
new { name = dxshader.IsVertexShader ? "vs_uniforms_vec4" : "ps_uniforms_vec4", set = MojoShader.MOJOSHADER_symbolRegisterSet.MOJOSHADER_SYMREGSET_FLOAT4, },
};
var cbuffer_index = new List <int> ();
for (var i = 0; i < symbol_types.Length; i++)
{
var cbuffer = new ConstantBufferData(symbol_types [i].name,
symbol_types [i].set,
symbols);
if (cbuffer.Size == 0)
{
continue;
}
var match = cbuffers.FindIndex(e => e.SameAs(cbuffer));
if (match == -1)
{
cbuffer_index.Add(cbuffers.Count);
cbuffers.Add(cbuffer);
}
else
{
cbuffer_index.Add(match);
}
}
dxshader._cbuffers = cbuffer_index.ToArray();
var glslCode = parseData.output;
// TODO: This sort of sucks... why does MojoShader not produce
// code valid for GLES out of the box?
// GLES platforms do not like this.
glslCode = glslCode.Replace("#version 110", "");
// Add the required precision specifiers for GLES.
var floatPrecision = dxshader.IsVertexShader ? "precision highp float;\r\n" : "precision mediump float;\r\n";
glslCode = "#ifdef GL_ES\r\n" +
floatPrecision +
"precision mediump int;\r\n" +
"#endif\r\n" +
glslCode;
// Enable standard derivatives extension as necessary
if ((glslCode.IndexOf("dFdx", StringComparison.InvariantCulture) >= 0) ||
(glslCode.IndexOf("dFdy", StringComparison.InvariantCulture) >= 0))
{
glslCode = "#extension GL_OES_standard_derivatives : enable\r\n" + glslCode;
}
// Store the code for serialization.
dxshader.ShaderCode = Encoding.ASCII.GetBytes(glslCode);
return(dxshader);
}
