From a352ecb7e63304034ac93332cf0c4d9183df867e Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Tue, 14 Jul 2015 07:12:13 +0200
Subject: Fix compilation / linkage of 0.5.0.1 HEADLESS_APP mode

Tested: GNU/Linux and OSX
---
 LibOVR/Src/CAPI/CAPI_HMDState.cpp         | 13 ++++--
 LibOVR/Src/OVR_CAPI.cpp                   | 17 ++++++--
 LibOVRKernel/Src/Kernel/OVR_DebugHelp.cpp | 69 +++++++++++++++++++++++++++++++
 3 files changed, 92 insertions(+), 7 deletions(-)

diff --git a/LibOVR/Src/CAPI/CAPI_HMDState.cpp b/LibOVR/Src/CAPI/CAPI_HMDState.cpp
index 7a00bf8..fede019 100755
--- a/LibOVR/Src/CAPI/CAPI_HMDState.cpp
+++ b/LibOVR/Src/CAPI/CAPI_HMDState.cpp
@@ -146,6 +146,7 @@ HMDState::HMDState(HMDInfo const & hmdInfo,
     {
         pHSWDisplay = *OVR::CAPI::HSWDisplay::Factory(ovrRenderAPI_None, pHmdDesc, RenderState);
     }
+#endif /* !defined(HEADLESS_APP) */
 
     RenderIMUTimeSeconds = 0.;
 
@@ -173,7 +174,6 @@ HMDState::~HMDState()
         OVR_FREE(pHmdDesc);
         pHmdDesc = nullptr;
     }
-#endif /* !defined(HEADLESS_APP) */
 }
 
 bool HMDState::InitializeSharedState()
@@ -950,13 +950,18 @@ bool HMDState::ConfigureRendering(ovrEyeRenderDesc eyeRenderDescOut[2],
 
     if (!pRenderer)
     {
+#if !defined(HEADLESS_APP)
         pRenderer = *DistortionRenderer::APICreateRegistry
                         [apiConfig->Header.API]();
+#endif /* !defined(HEADLESS_APP) */
     }
 
-    if (!pRenderer ||
-        !pRenderer->Initialize(apiConfig, &TheTrackingStateReader,
-                               &TimewarpTimer, &RenderState))
+    if (!pRenderer 
+#if !defined(HEADLESS_APP)
+        || !pRenderer->Initialize(apiConfig, &TheTrackingStateReader,
+                                  &TimewarpTimer, &RenderState)
+#endif /* !defined(HEADLESS_APP) */
+       )
     {
         RenderingConfigured = false;
         return false;
diff --git a/LibOVR/Src/OVR_CAPI.cpp b/LibOVR/Src/OVR_CAPI.cpp
index c530f82..e02151a 100755
--- a/LibOVR/Src/OVR_CAPI.cpp
+++ b/LibOVR/Src/OVR_CAPI.cpp
@@ -695,7 +695,12 @@ OVR_PUBLIC_FUNCTION(void) ovrHmd_EndFrame(ovrHmd hmddesc,
     hmds->checkBeginFrameScope("ovrHmd_EndFrame");
     ThreadChecker::Scope checkScope(&hmds->RenderAPIThreadChecker, "ovrHmd_EndFrame");  
     
-    hmds->pRenderer->SetLatencyTestColor(hmds->LatencyTestActive ? hmds->LatencyTestDrawColor : nullptr);
+#if !defined(HEADLESS_APP)
+    if (hmds->pRenderer)
+    {
+        hmds->pRenderer->SetLatencyTestColor(hmds->LatencyTestActive ? hmds->LatencyTestDrawColor : nullptr);
+    }
+#endif /* !defined(HEADLESS_APP) */
 
     ovrHmd_GetLatencyTest2DrawColor(hmddesc, nullptr); // We don't actually need to draw color, so send nullptr
     
@@ -1111,13 +1116,19 @@ OVR_PUBLIC_FUNCTION(ovrBool) ovrHmd_GetLatencyTest2DrawColor(ovrHmd hmddesc, uns
             rgbColorOut[2] = hmds->LatencyTest2DrawColor[2];
         }
 
-        if (hmds->pRenderer)
+#if !defined(HEADLESS_APP)
+        if (hmds->pRenderer) {
             hmds->pRenderer->SetLatencyTest2Color(hmds->LatencyTest2DrawColor);
+        }
+#endif /* !defined(HEADLESS_APP) */
     }
     else
     {
-        if (hmds->pRenderer)
+#if !defined(HEADLESS_APP)
+        if (hmds->pRenderer) {
             hmds->pRenderer->SetLatencyTest2Color(nullptr);
+        }
+#endif /* !defined(HEADLESS_APP) */
     }
 
     return dk2LatencyTest ? ovrTrue : ovrFalse;
diff --git a/LibOVRKernel/Src/Kernel/OVR_DebugHelp.cpp b/LibOVRKernel/Src/Kernel/OVR_DebugHelp.cpp
index ea39fb0..34fdd5f 100644
--- a/LibOVRKernel/Src/Kernel/OVR_DebugHelp.cpp
+++ b/LibOVRKernel/Src/Kernel/OVR_DebugHelp.cpp
@@ -21,6 +21,9 @@ limitations under the License.
 ************************************************************************************/
 
 #include "OVR_DebugHelp.h"
+
+#if !defined(HEADLESS_APP)
+
 #include "OVR_Types.h"
 #include "OVR_UTF8Util.h"
 #include "OVR_Atomic.h"
@@ -4099,3 +4102,69 @@ int GUIExceptionListener::HandleException(uintptr_t userValue,
 
 
 OVR_RESTORE_MSVC_WARNING()
+
+#else /* !defined(HEADLESS_APP) */
+
+namespace OVR {
+    // Exits the process with the given exit code.
+    void ExitProcess(intptr_t processReturnValue)
+    {
+        exit((int)processReturnValue);
+    }
+    bool OVRIsDebuggerPresent()
+    {
+        return false;
+    }
+    void ExceptionHandler::ReportDeadlock(const char* threadName,
+                                          const char* organizationName,
+                                          const char* applicationName)
+    {
+    }
+
+
+    bool SymbolLookup::Initialize()
+    {
+        return true;
+    }
+
+    bool SymbolLookup::IsInitialized()
+    {
+        return true;
+    }
+
+    void SymbolLookup::Shutdown()
+    {
+    }
+
+    bool SymbolLookup::Refresh()
+    {
+        return true;
+    }
+
+    size_t SymbolLookup::GetBacktrace(void* addressArray[], size_t addressArrayCapacity, size_t skipCount, void* platformThreadContext, OVR::ThreadSysId threadSysIdHelp) 
+    {
+        return 0;
+    }
+    bool SymbolLookup::LookupSymbol(uint64_t address, SymbolInfo& symbolInfo)
+    {
+        return false;
+    }
+    bool SymbolLookup::LookupSymbols(uint64_t* addressArray, SymbolInfo* pSymbolInfoArray, size_t arraySize)
+    {
+        return false;
+    }
+    SymbolLookup::SymbolLookup() { }
+    SymbolLookup::~SymbolLookup() { }
+    bool SymbolLookup::ReportThreadCallstacks(OVR::String& sOutput, size_t skipCount)
+    {
+        sOutput.Clear();
+        return true;
+    }
+    bool SymbolLookup::ReportModuleInformation(OVR::String& sOutput)
+    {
+        sOutput.Clear();
+        return true;
+    }
+} // namespace OVR
+
+#endif /* !defined(HEADLESS_APP) */
-- 
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