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// options.cpp
#include "options.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../../source/core/slang-writer.h"
#include "../../source/core/slang-render-api-util.h"
namespace renderer_test {
static const Options gDefaultOptions;
Options gOptions;
static gfx::RendererType _toRenderType(Slang::RenderApiType apiType)
{
using namespace Slang;
switch (apiType)
{
case RenderApiType::D3D11: return gfx::RendererType::DirectX11;
case RenderApiType::D3D12: return gfx::RendererType::DirectX12;
case RenderApiType::OpenGl: return gfx::RendererType::OpenGl;
case RenderApiType::Vulkan: return gfx::RendererType::Vulkan;
default: return gfx::RendererType::Unknown;
}
}
static SlangResult _setRendererType(RendererType type, const char* arg, Slang::WriterHelper stdError)
{
if (gOptions.rendererType != RendererType::Unknown)
{
stdError.print("Already has renderer option set. Found '%s'\n", arg);
return SLANG_FAIL;
}
gOptions.rendererType = type;
return SLANG_OK;
}
SlangResult parseOptions(int argc, const char*const* argv, Slang::WriterHelper stdError)
{
using namespace Slang;
// Reset the options
gOptions = gDefaultOptions;
List<const char*> positionalArgs;
typedef Options::ShaderProgramType ShaderProgramType;
typedef Options::InputLanguageID InputLanguageID;
//int argCount = argc;
char const* const* argCursor = argv;
char const* const* argEnd = argCursor + argc;
// first argument is the application name
if( argCursor != argEnd )
{
gOptions.appName = *argCursor++;
}
// now iterate over arguments to collect options
while(argCursor != argEnd)
{
char const* arg = *argCursor++;
if( arg[0] != '-' )
{
positionalArgs.Add(arg);
continue;
}
if( strcmp(arg, "--") == 0 )
{
while(argCursor != argEnd)
{
positionalArgs.Add(*argCursor++);
}
break;
}
else if( strcmp(arg, "-o") == 0 )
{
if( argCursor == argEnd )
{
stdError.print("expected argument for '%s' option\n", arg);
return SLANG_FAIL;
}
gOptions.outputPath = *argCursor++;
}
else if( strcmp(arg, "-xslang") == 0 )
{
// This is an option that we want to pass along to Slang
if( argCursor == argEnd )
{
stdError.print("expected argument for '%s' option\n", arg);
return SLANG_FAIL;
}
if( gOptions.slangArgCount == Options::kMaxSlangArgs )
{
stdError.print("maximum number of '%s' options exceeded (%d)\n", arg, Options::kMaxSlangArgs);
return SLANG_FAIL;
}
gOptions.slangArgs[gOptions.slangArgCount++] = *argCursor++;
}
else if (strcmp(arg, "-compute") == 0)
{
gOptions.shaderType = ShaderProgramType::Compute;
}
else if (strcmp(arg, "-graphics") == 0)
{
gOptions.shaderType = ShaderProgramType::Graphics;
}
else if (strcmp(arg, "-gcompute") == 0)
{
gOptions.shaderType = ShaderProgramType::GraphicsCompute;
}
else if( strcmp(arg, "-use-dxil") == 0 )
{
gOptions.useDXIL = true;
}
else
{
// Lookup
Slang::UnownedStringSlice argSlice(arg);
if (argSlice.size() && argSlice[0] == '-')
{
// Look up the rendering API if set
UnownedStringSlice argName = UnownedStringSlice(argSlice.begin() + 1, argSlice.end());
RendererType rendererType = _toRenderType(RenderApiUtil::findApiTypeByName(argName));
if (rendererType != RendererType::Unknown)
{
gOptions.rendererType = rendererType;
continue;
}
// Lookup the target language type
RendererType languageRenderType = _toRenderType(RenderApiUtil::findImplicitLanguageRenderApiType(argName));
if (languageRenderType != RendererType::Unknown)
{
gOptions.targetLanguageRendererType = languageRenderType;
gOptions.inputLanguageID = (argName == "hlsl" || argName == "glsl") ? InputLanguageID::Native : InputLanguageID::Slang;
continue;
}
}
stdError.print("unknown option '%s'\n", arg);
return SLANG_FAIL;
}
}
// If a render option isn't set use defaultRenderType
gOptions.rendererType = (gOptions.rendererType == RendererType::Unknown) ? gOptions.targetLanguageRendererType : gOptions.rendererType;
// first positional argument is source shader path
if(positionalArgs.Count())
{
gOptions.sourcePath = positionalArgs[0];
positionalArgs.RemoveAt(0);
}
// any remaining arguments represent an error
if(positionalArgs.Count() != 0)
{
stdError.print("unexpected arguments\n");
return SLANG_FAIL;
}
return SLANG_OK;
}
} // renderer_test
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