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#include "render-api-util.h"
#include "../../source/core/slang-defines.h"
#include "../../source/core/list.h"
#include "../../source/core/slang-string-util.h"
/* static */const RenderApiUtil::Info RenderApiUtil::s_infos[] =
{
{ RenderApiType::OpenGl, "gl,ogl,opengl"},
{ RenderApiType::Vulkan, "vk,vulkan"},
{ RenderApiType::D3D12, "dx12,d3d12"},
{ RenderApiType::D3D11, "dx11,d3d11"},
};
static int _calcAvailableApis()
{
int flags = 0;
for (int i = 0; i < int(RenderApiType::CountOf); i++)
{
if (RenderApiUtil::calcHasApi(RenderApiType(i)))
{
flags |= (1 << i);
}
}
return flags;
}
/* static */int RenderApiUtil::getAvailableApis()
{
static int s_availableApis = _calcAvailableApis();
return s_availableApis;
}
/* static */RenderApiType RenderApiUtil::findApiTypeByName(const Slang::UnownedStringSlice& name)
{
using namespace Slang;
List<UnownedStringSlice> namesList;
for (int j = 0; j < SLANG_COUNT_OF(RenderApiUtil::s_infos); j++)
{
const auto& apiInfo = RenderApiUtil::s_infos[j];
const UnownedStringSlice names(apiInfo.names);
if (names.indexOf(',') >= 0)
{
StringUtil::split(names, ',', namesList);
if (namesList.IndexOf(name) != UInt(-1))
{
return apiInfo.type;
}
}
else if (names == name)
{
return apiInfo.type;
}
}
return RenderApiType::Unknown;
}
/* static */int RenderApiUtil::findApiFlagsByName(const Slang::UnownedStringSlice& name)
{
// Special case 'all'
if (name == "all")
{
return int(RenderApiFlag::AllOf);
}
RenderApiType type = findApiTypeByName(name);
return (type == RenderApiType::Unknown) ? 0 : (1 << int(type));
}
/* static */Slang::Result RenderApiUtil::parseApiFlags(const Slang::UnownedStringSlice& text, int* apiBitsOut)
{
using namespace Slang;
int apiBits = 0;
List<UnownedStringSlice> slices;
StringUtil::split(text, ',', slices);
for (int i = 0; i < int(slices.Count()); ++i)
{
UnownedStringSlice slice = slices[i];
bool add = true;
if (slice.size() <= 0)
{
return SLANG_FAIL;
}
if (slice[0] == '+')
{
// Drop the +
slice = UnownedStringSlice(slice.begin() + 1, slice.end());
}
else if (slice[0] == '-')
{
add = false;
// Drop the +
slice = UnownedStringSlice(slice.begin() + 1, slice.end());
}
// We need to find the bits...
int bits = findApiFlagsByName(slice);
// 0 means an error
if (bits == 0)
{
return SLANG_FAIL;
}
if (add)
{
apiBits |= bits;
}
else
{
apiBits &= ~bits;
}
}
*apiBitsOut = apiBits;
return SLANG_OK;
}
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!! Platform specific stuff !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
#if SLANG_WINDOWS_FAMILY
#define WIN32_LEAN_AND_MEAN
#define NOMINMAX
#include <Windows.h>
#undef WIN32_LEAN_AND_MEAN
#undef NOMINMAX
namespace { // anonymous
class WinModule
{
public:
/// Initialize. Returns the module on success
HMODULE init(const char* name)
{
if (m_module)
{
::FreeModule(m_module);
m_module = nullptr;
}
return m_module = ::LoadLibraryA(name);
}
/// convert to HMODULE
SLANG_FORCE_INLINE operator HMODULE() const { return m_module; }
/// True if loaded
bool isLoaded() const { return m_module != nullptr; }
explicit WinModule(const char* name) :
m_module(nullptr)
{
init(name);
}
/// Ctor
WinModule() :m_module(nullptr) {}
/// Dtor
~WinModule()
{
if (m_module)
{
::FreeLibrary(m_module);
}
}
protected:
HMODULE m_module;
};
} // anonymous
#else
#endif
/* static */bool RenderApiUtil::calcHasApi(RenderApiType type)
{
#if SLANG_WINDOWS_FAMILY
switch (type)
{
case RenderApiType::OpenGl: return WinModule("opengl32.dll").isLoaded();
case RenderApiType::Vulkan: return WinModule("vulkan-1.dll").isLoaded();
case RenderApiType::D3D11: return WinModule("d3d11.dll").isLoaded();
case RenderApiType::D3D12: return WinModule("d3d12.dll").isLoaded();
default: return false;
}
#else
switch (type)
{
case RenderApiType::OpenGl:
case RenderApiType::Vulkan:
{
return true;
}
default: return false;
}
#endif
}
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