Removed unused macro invocation from shader

[platform/core/uifw/dali-toolkit.git] / dali-scene3d / public-api / loader / shader-definition.cpp

diff --git a/dali-scene3d/public-api/loader/shader-definition.cpp b/dali-scene3d/public-api/loader/shader-definition.cpp
index 49ff885..5aba19e 100644 (file)
--- a/dali-scene3d/public-api/loader/shader-definition.cpp
+++ b/dali-scene3d/public-api/loader/shader-definition.cpp
@@ -20,11 +20,21 @@
 
 // EXTERNAL INCLUDES
 #include <dali/public-api/object/property-array.h>
+#include <regex>
 
 // INTERNAL INCLUDES
 #include <dali-scene3d/internal/graphics/builtin-shader-extern-gen.h>
 #include <dali-scene3d/public-api/loader/utils.h>
 
+#include <dali/integration-api/debug.h>
+
+namespace
+{
+#if defined(DEBUG_ENABLED)
+Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_MODEL_SHADER_DEFINITION");
+#endif
+} // namespace
+
 namespace Dali::Scene3D::Loader
 {
 namespace
@@ -44,7 +54,7 @@ ShaderDefinition::ShaderDefinition(const ShaderDefinition& other)
 {
 }
 
-void ShaderDefinition::ApplyDefine(std::string& shaderCode, const std::string& definevar)
+void ApplyDefine(std::string& shaderCode, const std::string& definevar)
 {
   const std::string IF_1 = "#if 1";
 
@@ -79,6 +89,39 @@ void ShaderDefinition::ApplyDefine(std::string& shaderCode, const std::string& d
   }
 }
 
+void RedefineMacro(std::string& shaderCode, const std::string& macro, const std::string& value)
+{
+  if(!value.empty())
+  {
+    std::string definition = "#define " + macro;
+    std::size_t found      = shaderCode.find(definition);
+    if(found != std::string::npos)
+    {
+      std::size_t insertionPoint = found + definition.length();
+
+      // Automatically insert line-continuation character into value
+      std::regex                 re("\n");
+      std::sregex_token_iterator first{value.begin(), value.end(), re, -1}, last;
+      for(auto i = first; i != last; ++i)
+      {
+        std::string line = std::string(" \\\n") + (*i).str();
+        shaderCode.insert(insertionPoint, line);
+        insertionPoint += line.length();
+      }
+    }
+  }
+  else
+  {
+    std::size_t invocation = shaderCode.rfind(macro);
+    if(invocation != std::string::npos)
+    {
+      std::size_t start = shaderCode.rfind("\n", invocation);
+      std::size_t end   = shaderCode.find("\n", invocation);
+      shaderCode.erase(start, end - start);
+    }
+  }
+}
+
 ShaderDefinition::RawData
 ShaderDefinition::LoadRaw(const std::string& shadersPath) const
 {
@@ -117,6 +160,12 @@ ShaderDefinition::LoadRaw(const std::string& shadersPath) const
       ApplyDefine(raw.mFragmentShaderSource, definevar);
       ApplyDefine(raw.mShadowVertexShaderSource, definevar);
     }
+    for(const auto& macroDef : mMacros)
+    {
+      RedefineMacro(raw.mVertexShaderSource, macroDef.macro, macroDef.definition);
+      RedefineMacro(raw.mFragmentShaderSource, macroDef.macro, macroDef.definition);
+      RedefineMacro(raw.mShadowVertexShaderSource, macroDef.macro, macroDef.definition);
+    }
   }
 
   return raw;
@@ -151,6 +200,7 @@ Shader ShaderDefinition::Load(RawData&& raw) const
   array.PushBack(map[0]);
   array.PushBack(map[1]);
 
+  DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Vert Shader src: \n%s\n", raw.mVertexShaderSource.c_str());
   Shader shader = Shader::New(array);
   for(Property::Map::SizeType i0 = 0, i1 = mUniforms.Count(); i0 != i1; ++i0)
   {