ptr<ShaderSource> GlslGeneratorInstance::Generate()
{
// first stage: register all nodes
RegisterNode(rootNode);
// заголовок файла
switch(glslVersion)
{
case GlslVersions::opengl33:
text << "#version 330\n";
break;
case GlslVersions::webgl:
// version numbers in WebGL are not supported
text <<
"#extension GL_OES_standard_derivatives : enable\n"
"#extension GL_EXT_draw_buffers : enable\n"
"#ifdef GL_ES\n"
"precision highp float;\n"
"#endif\n";
break;
default:
THROW("Unknown GLSL version");
}
// вывести атрибуты в качестве входных переменных, если это вершинный шейдер
if(shaderType == ShaderTypes::vertex)
{
const char* prefixStr;
switch(glslVersion)
{
case GlslVersions::opengl33: prefixStr = "in "; break;
case GlslVersions::webgl: prefixStr = "attribute "; break;
default: THROW("Unknown GLSL version");
}
std::sort(attributes.begin(), attributes.end());
for(size_t i = 0; i < attributes.size(); ++i)
{
AttributeNode* node = attributes[i];
text << prefixStr;
DataType valueType = node->GetValueType();
// hack for lack of supporting integer attributes in WebGL
// change them to float
if(glslVersion == GlslVersions::webgl)
valueType = EnforceFloatDataType(valueType);
PrintDataType(valueType);
text << " a" << node->GetElementIndex() << ";\n";
}
}
// print transformed nodes
if(!transformedNodes.empty())
{
if(shaderType != ShaderTypes::pixel)
THROW("Only pixel shader may have transformed nodes");
const char* prefixStr;
switch(glslVersion)
{
case GlslVersions::opengl33: prefixStr = "in "; break;
case GlslVersions::webgl: prefixStr = "varying "; break;
default: THROW("Unknown GLSL version");
}
for(size_t i = 0; i < transformedNodes.size(); ++i)
{
TransformedNode* node = transformedNodes[i];
text << prefixStr;
PrintDataType(node->GetValueType());
text << " v" << node->GetSemantic() << ";\n";
}
}
// print interpolate nodes
if(!interpolateNodes.empty())
{
if(shaderType != ShaderTypes::vertex)
THROW("Only vertex shader may have interpolate nodes");
const char* prefixStr;
switch(glslVersion)
{
case GlslVersions::opengl33: prefixStr = "out "; break;
case GlslVersions::webgl: prefixStr = "varying "; break;
default: THROW("Unknown GLSL version");
}
for(size_t i = 0; i < interpolateNodes.size(); ++i)
{
InterpolateNode* node = interpolateNodes[i];
text << prefixStr;
PrintDataType(node->GetValueType());
text << " v" << node->GetSemantic() << ";\n";
}
}
// вывести пиксельные переменные, если это пиксельный шейдер, и это нужно
if(shaderType == ShaderTypes::pixel && glslVersion == GlslVersions::opengl33)
{
for(int i = 0; i < fragmentTargetsCount; ++i)
{
text << "out ";
PrintDataType(DataTypes::_vec4);
text << " r" << i << ";\n";
}
}
// print uniforms
PrintUniforms();
// samplers
for(size_t i = 0; i < samplers.size(); ++i)
{
SamplerNode* samplerNode = samplers[i];
// строка, описывающая основной тип семпла
const char* valueTypeStr;
switch(samplerNode->GetValueType())
{
case DataTypes::_float:
case DataTypes::_vec2:
case DataTypes::_vec3:
case DataTypes::_vec4:
valueTypeStr = "";
break;
case DataTypes::_uint:
case DataTypes::_uvec2:
case DataTypes::_uvec3:
case DataTypes::_uvec4:
valueTypeStr = glslVersion == GlslVersions::webgl ? "i" : "u";
break;
case DataTypes::_int:
case DataTypes::_ivec2:
case DataTypes::_ivec3:
case DataTypes::_ivec4:
valueTypeStr = "i";
break;
default:
THROW("Invalid sampler value type");
}
// строка, описывающая размерность
const char* dimensionStr;
switch(samplerNode->GetCoordType())
{
case SamplerNode::_1D:
dimensionStr = "1D";
break;
case SamplerNode::_2D:
dimensionStr = "2D";
break;
case SamplerNode::_3D:
dimensionStr = "3D";
break;
case SamplerNode::_Cube:
dimensionStr = "Cube";
break;
default:
THROW("Invalid sampler coord type");
}
// вывести семплер
int slot = samplerNode->GetSlot();
text << "uniform " << valueTypeStr << "sampler" << dimensionStr << ' ' << samplerPrefix << slot << ";\n";
}
//** заголовок функции шейдера
text << "void main()\n{\n";
// shader code
for(size_t i = 0; i < nodeInits.size(); ++i)
PrintNodeInit(i);
// завершение шейдера
text << "}\n";
// make list of uniform variable bindings
GlShaderBindings::UniformBindings uniformBindings;
if(!supportUniformBuffers)
{
uniformBindings.resize(uniforms.size());
for(size_t i = 0; i < uniforms.size(); ++i)
{
UniformNode* node = uniforms[i].second;
GlShaderBindings::UniformBinding& uniformBinding = uniformBindings[i];
uniformBinding.dataType = node->GetValueType();
uniformBinding.count = node->GetCount();
uniformBinding.slot = uniforms[i].first->GetSlot();
uniformBinding.offset = node->GetOffset();
std::ostringstream ss;
ss << uniformPrefix << uniformBinding.slot << '_' << uniformBinding.offset;
uniformBinding.name = ss.str();
}
}
// make list of uniform block bindings
GlShaderBindings::Bindings uniformBlockBindings;
if(supportUniformBuffers)
{
uniformBlockBindings.resize(uniforms.size());
for(size_t i = 0; i < uniforms.size(); ++i)
{
int slot = uniforms[i].first->GetSlot();
char name[16];
sprintf(name, "%s%d", uniformBufferPrefix, slot);
uniformBlockBindings[i].first = name;
uniformBlockBindings[i].second = slot;
}
// remove duplicates
std::sort(uniformBlockBindings.begin(), uniformBlockBindings.end());
uniformBlockBindings.resize(std::unique(uniformBlockBindings.begin(), uniformBlockBindings.end()) - uniformBlockBindings.begin());
}
// сформировать список привязок семплеров
GlShaderBindings::Bindings samplerBindings(samplers.size());
for(size_t i = 0; i < samplers.size(); ++i)
{
int slot = samplers[i]->GetSlot();
char name[16];
sprintf(name, "%s%d", samplerPrefix, slot);
samplerBindings[i].first = name;
samplerBindings[i].second = slot;
}
// сформировать список привязок атрибутов
GlShaderBindings::Bindings attributeBindings(attributes.size());
for(size_t i = 0; i < attributes.size(); ++i)
{
int index = attributes[i]->GetElementIndex();
char name[16];
sprintf(name, "a%d", index);
attributeBindings[i].first = name;
attributeBindings[i].second = index;
}
// make a target variables list
GlShaderBindings::Bindings targetBindings;
switch(glslVersion)
{
case GlslVersions::opengl33:
targetBindings.resize(fragmentTargetsCount);
for(int i = 0; i < fragmentTargetsCount; ++i)
{
char name[16];
sprintf(name, "r%d", i);
targetBindings[i].first = name;
targetBindings[i].second = i;
}
break;
case GlslVersions::webgl:
// no bindings needed, because of use of gl_FragColor/gl_FragData
break;
}
return NEW(GlslSource(
Strings::String2File(text.str()),
NEW(GlShaderBindings(uniformBindings, uniformBlockBindings, samplerBindings, attributeBindings, targetBindings, dualFragmentTarget))
));
}
ptr<ShaderSource> Hlsl11GeneratorInstance::Generate()
{
// first stage: register all nodes
RegisterNode(rootNode);
// find out if we need instance id
for(size_t i = 0; i < nodeInits.size(); ++i)
{
Node* node = nodeInits[i];
if(node->GetType() == Node::typeOperation)
{
OperationNode* operationNode = fast_cast<OperationNode*>(node);
if(operationNode->GetOperation() == OperationNode::operationGetInstanceID)
needInstanceID = true;
}
}
// выборы в зависимости от типа шейдера
const char* mainFunctionName;
const char* inputTypeName;
const char* inputName;
const char* outputTypeName;
const char* outputName;
const char* profile;
switch(shaderType)
{
case ShaderTypes::vertex:
mainFunctionName = "VS";
inputTypeName = "A";
inputName = "a";
outputTypeName = "V";
outputName = "v";
profile = "vs_4_0";
break;
case ShaderTypes::pixel:
mainFunctionName = "PS";
inputTypeName = "V";
inputName = "v";
outputTypeName = "R";
outputName = "r";
profile = "ps_4_0";
break;
default:
THROW("Unknown shader type");
}
// вывести атрибуты, если вершинный шейдер
if(shaderType == ShaderTypes::vertex)
{
text << "struct A\n{\n";
struct IndexSorter
{
bool operator()(AttributeNode* a, AttributeNode* b) const
{
return a->GetElementIndex() < b->GetElementIndex();
}
};
std::sort(attributes.begin(), attributes.end(), IndexSorter());
for(size_t i = 0; i < attributes.size(); ++i)
{
AttributeNode* node = attributes[i];
text << '\t';
PrintDataType(node->GetValueType());
int index = node->GetElementIndex();
text << " a" << index << " : " << Dx11System::GetSemanticString(index) << ";\n";
}
text << "};\n";
}
// print transformed nodes
if(shaderType == ShaderTypes::pixel)
{
text << "struct V\n{\n";
struct SemanticSorter
{
bool operator()(TransformedNode* a, TransformedNode* b) const
{
return a->GetSemantic() < b->GetSemantic();
}
};
std::sort(transformedNodes.begin(), transformedNodes.end(), SemanticSorter());
for(size_t i = 0; i < transformedNodes.size(); ++i)
{
TransformedNode* node = transformedNodes[i];
text << '\t';
PrintDataType(node->GetValueType());
int semantic = node->GetSemantic();
text << " v" << semantic << " : " << Dx11System::GetSemanticString(semantic) << ";\n";
}
text << "};\n";
}
// print interpolate nodes
if(shaderType == ShaderTypes::vertex)
{
text << "struct V\n{\n";
struct SemanticSorter
{
bool operator()(InterpolateNode* a, InterpolateNode* b) const
{
return a->GetSemantic() < b->GetSemantic();
}
};
std::sort(interpolateNodes.begin(), interpolateNodes.end(), SemanticSorter());
for(size_t i = 0; i < interpolateNodes.size(); ++i)
{
InterpolateNode* node = interpolateNodes[i];
text << '\t';
PrintDataType(node->GetValueType());
int semantic = node->GetSemantic();
text << " v" << semantic << " : " << Dx11System::GetSemanticString(semantic) << ";\n";
}
// вывести SV_Position
text << "\tfloat4 vTP : SV_Position;\n";
text << "};\n";
}
// вывести пиксельные переменные, если это пиксельный шейдер
if(shaderType == ShaderTypes::pixel)
{
text << "struct R\n{\n";
for(int i = 0; i < fragmentTargetsCount; ++i)
{
text << '\t';
PrintDataType(DataTypes::_vec4);
text << " r" << i << " : SV_Target" << i << ";\n";
}
text << "};\n";
}
// вывести uniform-буферы
PrintUniforms();
// семплеры
struct SamplerSlotSorter
{
bool operator()(SamplerNode* a, SamplerNode* b) const
{
return a->GetSlot() < b->GetSlot();
}
};
std::sort(samplers.begin(), samplers.end(), SamplerSlotSorter());
for(size_t i = 0; i < samplers.size(); ++i)
{
SamplerNode* samplerNode = samplers[i];
const char* textureStr;
switch(samplerNode->GetCoordType())
{
case SamplerNode::_1D:
textureStr = "Texture1D";
break;
case SamplerNode::_2D:
textureStr = "Texture2D";
break;
case SamplerNode::_3D:
textureStr = "Texture3D";
break;
case SamplerNode::_Cube:
textureStr = "TextureCube";
break;
default:
THROW("Invalid sampler coord type");
}
// текстура
text << textureStr << '<';
PrintDataType(samplerNode->GetValueType());
int slot = samplerNode->GetSlot();
text << "> t" << slot << " : register(t" << slot << ");\n";
// семплер
text << "SamplerState s" << slot << " : register(s" << slot << ");\n";
}
//** заголовок функции шейдера
text << outputTypeName << ' ' << mainFunctionName << '(' << inputTypeName << ' ' << inputName;
// если шейдер использует instance ID, добавить аргумент
if(needInstanceID)
text << ", uint sI : SV_InstanceID";
// завершить заголовок
text << ")\n{\n\t" << outputTypeName << ' ' << outputName << ";\n";
// shader code
for(size_t i = 0; i < nodeInits.size(); ++i)
PrintNodeInit(i);
// завершение шейдера
text << "\treturn " << outputName << ";\n}\n";
// получить маски ресурсов
int uniformBuffersMask = 0;
for(size_t i = 0; i < uniforms.size(); ++i)
uniformBuffersMask |= 1 << uniforms[i].first->GetSlot();
int samplersMask = 0;
for(size_t i = 0; i < samplers.size(); ++i)
samplersMask |= 1 << samplers[i]->GetSlot();
Dx11ShaderResources resources(uniformBuffersMask, samplersMask);
return NEW(Hlsl11Source(Strings::String2File(text.str()), mainFunctionName, profile, resources));
}
