124 lines
4.3 KiB
C++
124 lines
4.3 KiB
C++
#include "RuntimeShaderParams.h"
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#include "Std140Buffer.h"
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#include <chrono>
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namespace
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{
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ShaderParameterValue DefaultValueForDefinition(const ShaderParameterDefinition& definition)
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{
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ShaderParameterValue value;
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switch (definition.type)
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{
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case ShaderParameterType::Float:
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value.numberValues = definition.defaultNumbers.empty() ? std::vector<double>{ 0.0 } : definition.defaultNumbers;
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break;
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case ShaderParameterType::Vec2:
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value.numberValues = definition.defaultNumbers.size() == 2 ? definition.defaultNumbers : std::vector<double>{ 0.0, 0.0 };
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break;
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case ShaderParameterType::Color:
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value.numberValues = definition.defaultNumbers.size() == 4 ? definition.defaultNumbers : std::vector<double>{ 1.0, 1.0, 1.0, 1.0 };
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break;
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case ShaderParameterType::Boolean:
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value.booleanValue = definition.defaultBoolean;
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break;
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case ShaderParameterType::Enum:
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value.enumValue = definition.defaultEnumValue;
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break;
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case ShaderParameterType::Text:
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value.textValue = definition.defaultTextValue;
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break;
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case ShaderParameterType::Trigger:
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value.numberValues = { 0.0, -1000000.0 };
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break;
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}
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return value;
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}
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int EnumIndexForDefault(const ShaderParameterDefinition& definition, const ShaderParameterValue& value)
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{
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for (std::size_t optionIndex = 0; optionIndex < definition.enumOptions.size(); ++optionIndex)
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{
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if (definition.enumOptions[optionIndex].value == value.enumValue)
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return static_cast<int>(optionIndex);
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}
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return 0;
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}
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double UtcSecondsOfDay()
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{
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const auto now = std::chrono::system_clock::now();
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const auto seconds = std::chrono::duration_cast<std::chrono::seconds>(now.time_since_epoch()).count();
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const long long secondsPerDay = 24 * 60 * 60;
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long long daySeconds = seconds % secondsPerDay;
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if (daySeconds < 0)
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daySeconds += secondsPerDay;
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return static_cast<double>(daySeconds);
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}
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}
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std::vector<unsigned char> BuildRuntimeShaderGlobalParamsStd140(
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const RuntimeShaderArtifact& artifact,
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uint64_t frameIndex,
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unsigned width,
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unsigned height)
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{
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std::vector<unsigned char> buffer;
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buffer.reserve(512);
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AppendStd140Float(buffer, static_cast<float>(frameIndex) / 60.0f);
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AppendStd140Vec2(buffer, static_cast<float>(width), static_cast<float>(height));
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AppendStd140Vec2(buffer, static_cast<float>(width), static_cast<float>(height));
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AppendStd140Float(buffer, static_cast<float>(UtcSecondsOfDay()));
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AppendStd140Float(buffer, 0.0f);
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AppendStd140Float(buffer, 0.37f);
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AppendStd140Float(buffer, static_cast<float>(frameIndex));
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AppendStd140Float(buffer, 1.0f);
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AppendStd140Float(buffer, 0.0f);
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AppendStd140Int(buffer, 0);
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AppendStd140Int(buffer, 0);
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AppendStd140Int(buffer, 0);
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for (const ShaderParameterDefinition& definition : artifact.parameterDefinitions)
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{
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const auto valueIt = artifact.parameterValues.find(definition.id);
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const ShaderParameterValue value = valueIt == artifact.parameterValues.end()
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? DefaultValueForDefinition(definition)
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: valueIt->second;
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switch (definition.type)
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{
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case ShaderParameterType::Float:
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AppendStd140Float(buffer, value.numberValues.empty() ? 0.0f : static_cast<float>(value.numberValues[0]));
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break;
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case ShaderParameterType::Vec2:
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AppendStd140Vec2(buffer,
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value.numberValues.size() > 0 ? static_cast<float>(value.numberValues[0]) : 0.0f,
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value.numberValues.size() > 1 ? static_cast<float>(value.numberValues[1]) : 0.0f);
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break;
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case ShaderParameterType::Color:
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AppendStd140Vec4(buffer,
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value.numberValues.size() > 0 ? static_cast<float>(value.numberValues[0]) : 1.0f,
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value.numberValues.size() > 1 ? static_cast<float>(value.numberValues[1]) : 1.0f,
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value.numberValues.size() > 2 ? static_cast<float>(value.numberValues[2]) : 1.0f,
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value.numberValues.size() > 3 ? static_cast<float>(value.numberValues[3]) : 1.0f);
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break;
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case ShaderParameterType::Boolean:
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AppendStd140Int(buffer, value.booleanValue ? 1 : 0);
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break;
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case ShaderParameterType::Enum:
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AppendStd140Int(buffer, EnumIndexForDefault(definition, value));
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break;
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case ShaderParameterType::Text:
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break;
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case ShaderParameterType::Trigger:
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AppendStd140Int(buffer, value.numberValues.empty() ? 0 : static_cast<int>(value.numberValues[0]));
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AppendStd140Float(buffer, value.numberValues.size() > 1 ? static_cast<float>(value.numberValues[1]) : -1000000.0f);
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break;
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}
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}
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buffer.resize(AlignStd140(buffer.size(), 16), 0);
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return buffer;
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}
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