X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=dali%2Finternal%2Frender%2Fcommon%2Frender-algorithms.cpp;h=ce56324b50a524183cf6446a4c6c496c17135ad2;hb=be285a5aa0ba77ea635e8d8c2692d585ca30630e;hp=695a57440f51a5b0a875bceef7e3f10e4805732b;hpb=1504ffe03f767eec8035864db2753494fe7a063c;p=platform%2Fcore%2Fuifw%2Fdali-core.git

diff --git a/dali/internal/render/common/render-algorithms.cpp b/dali/internal/render/common/render-algorithms.cpp
index 695a574..ce56324 100644
--- a/dali/internal/render/common/render-algorithms.cpp
+++ b/dali/internal/render/common/render-algorithms.cpp
@@ -42,9 +42,19 @@ namespace Render
 
 namespace
 {
+
 // Table for fast look-up of Dali::DepthFunction enum to a GL depth function.
 // Note: These MUST be in the same order as Dali::DepthFunction enum.
-const short DaliDepthToGLDepthTable[] = { GL_NEVER, GL_ALWAYS, GL_LESS, GL_GREATER, GL_EQUAL, GL_NOTEQUAL, GL_LEQUAL, GL_GEQUAL };
+const int DaliDepthToGLDepthTable[]  = { GL_NEVER, GL_ALWAYS, GL_LESS, GL_GREATER, GL_EQUAL, GL_NOTEQUAL, GL_LEQUAL, GL_GEQUAL };
+
+// Table for fast look-up of Dali::StencilFunction enum to a GL stencil function.
+// Note: These MUST be in the same order as Dali::StencilFunction enum.
+const int DaliStencilFunctionToGL[]  = { GL_NEVER, GL_LESS, GL_EQUAL, GL_LEQUAL, GL_GREATER, GL_NOTEQUAL, GL_GEQUAL, GL_ALWAYS };
+
+// Table for fast look-up of Dali::StencilOperation enum to a GL stencil operation.
+// Note: These MUST be in the same order as Dali::StencilOperation enum.
+const int DaliStencilOperationToGL[] = { GL_ZERO, GL_KEEP, GL_REPLACE, GL_INCR, GL_DECR, GL_INVERT, GL_INCR_WRAP, GL_DECR_WRAP };
+
 } // Unnamed namespace
 
 /**
@@ -75,7 +85,7 @@ inline void SetScissorTest( const RenderList& renderList, Context& context )
  * @param[in] depthTestEnabled True if depth test is enabled for the layer
  * @param[in] isLayer3D True if the layer is a 3D layer
  */
-inline void SetRenderFlags( const RenderList& renderList, Context& context, bool depthTestEnabled, bool isLayer3D )
+inline void SetRenderFlags( const RenderList& renderList, Context& context, bool depthTestEnabled )
 {
   const unsigned int renderFlags = renderList.GetFlags();
   GLbitfield clearMask = 0u;
@@ -89,28 +99,27 @@ inline void SetRenderFlags( const RenderList& renderList, Context& context, bool
     context.StencilFunc( ( enableStencilWrite ? GL_ALWAYS : GL_EQUAL ), 1, 0xFF );
     context.StencilOp( GL_KEEP, GL_REPLACE, GL_REPLACE );
 
+    // Write to stencil buffer or color buffer, but not both.
+    // These should only be set if the Actor::DrawMode is managing the stencil (and color) buffer.
+    context.StencilMask( enableStencilWrite ? 0xFF : 0x00 );
+    context.ColorMask( !enableStencilWrite );
+
     clearMask |= ( renderFlags & RenderList::STENCIL_CLEAR ) ? GL_STENCIL_BUFFER_BIT : 0u;
   }
 
-  // Write to stencil buffer or color buffer, but not both
-  context.StencilMask( enableStencilWrite ? 0xFF : 0x00 );
-  context.ColorMask( !enableStencilWrite );
-
   // Enable and Clear the depth buffer if required.
-  // DepthTest must be enabled for the layer, else testing is turned off.
-  if( !depthTestEnabled )
+  if( depthTestEnabled )
   {
-    context.EnableDepthBuffer( false );
-  }
-  else if( renderList.HasColorRenderItems() || isLayer3D ) // Also, within the context of this if(), depth test is enabled.
-  {
-
     clearMask |= GL_DEPTH_BUFFER_BIT;
+
     // We need to enable the depth buffer to clear it.
     // Subsequently it is enabled and disabled on a per-RenderItem basis.
-    // If we do not have color renderers, this is only done for 3D layers.
     context.EnableDepthBuffer( true );
   }
+  else
+  {
+    context.EnableDepthBuffer( false );
+  }
 
   // Clear Depth and/or stencil buffers as required.
   // Note: The buffers will only be cleared if written to since a previous clear.
@@ -118,27 +127,78 @@ inline void SetRenderFlags( const RenderList& renderList, Context& context, bool
 }
 
 /**
+ * @brief This method sets up the stencil and color buffer based on the current Renderers flags.
+ * @param[in]     item                     The current RenderItem about to be rendered
+ * @param[in]     context                  The context
+ * @param[in/out] usedStencilBuffer        True if the stencil buffer has been used so far within this RenderList
+ * @param[in]     stencilManagedByDrawMode True if the stencil and color buffer is being managed by DrawMode::STENCIL
+ */
+inline void SetupPerRendererFlags( const RenderItem& item, Context& context, bool& usedStencilBuffer, bool stencilManagedByDrawMode )
+{
+  // DrawMode::STENCIL is deprecated, however to support it we must not set
+  // flags based on the renderer properties if it is in use.
+  if( stencilManagedByDrawMode )
+  {
+    return;
+  }
+
+  // Setup the color buffer based on the renderers properties.
+  Renderer *renderer = item.mRenderer;
+  RenderMode::Type renderMode = renderer->GetRenderMode();
+  const bool writeToColorBuffer = ( renderMode == RenderMode::AUTO ) || ( renderMode == RenderMode::COLOR ) || ( renderMode == RenderMode::COLOR_STENCIL );
+  context.ColorMask( writeToColorBuffer );
+
+  // If the stencil buffer is disabled for this renderer, exit now to save unnecessary value setting.
+  if( ( renderMode != RenderMode::STENCIL ) && ( renderMode != RenderMode::COLOR_STENCIL ) )
+  {
+    // No per-renderer stencil setup, exit.
+    context.EnableStencilBuffer( false );
+    return;
+  }
+
+  // At this point, the stencil buffer is enabled.
+  context.EnableStencilBuffer( true );
+
+  // If this is the first use of the stencil buffer within this RenderList, clear it now.
+  // This avoids unnecessary clears.
+  if( !usedStencilBuffer )
+  {
+    context.Clear( GL_STENCIL_BUFFER_BIT, Context::CHECK_CACHED_VALUES );
+    usedStencilBuffer = true;
+  }
+
+  // Setup the stencil buffer based on the renderers properties.
+  context.StencilFunc( DaliStencilFunctionToGL[ renderer->GetStencilFunction() ],
+      renderer->GetStencilFunctionReference(),
+      renderer->GetStencilFunctionMask() );
+  context.StencilOp( DaliStencilOperationToGL[ renderer->GetStencilOperationOnFail() ],
+      DaliStencilOperationToGL[ renderer->GetStencilOperationOnZFail() ],
+      DaliStencilOperationToGL[ renderer->GetStencilOperationOnZPass() ] );
+  context.StencilMask( renderer->GetStencilMask() );
+}
+
+/**
  * Sets up the depth buffer for reading and writing based on the current render item.
  * The items read and write mode are used if specified.
  * If AUTO is selected for reading, the decision will be based on the Layer Behavior.
  * If AUTO is selected for writing, the decision will be based on the items opacity.
  * @param item The RenderItem to set up the depth buffer for
  * @param context The context used to execute GL commands.
- * @param isLayer3D True if the layer behavior is set to LAYER_3D
+ * @param depthTestEnabled True if depth testing has been enabled.
  */
-inline void SetupDepthBuffer( const RenderItem& item, Context& context, bool isLayer3D )
+inline void SetupDepthBuffer( const RenderItem& item, Context& context, bool depthTestEnabled )
 {
   // Set up whether or not to write to the depth buffer.
   const DepthWriteMode::Type depthWriteMode = item.mRenderer->GetDepthWriteMode();
   // Most common mode (AUTO) is tested first.
-  bool enableDepthWrite = ( ( depthWriteMode == DepthWriteMode::AUTO ) && item.mIsOpaque ) ||
+  bool enableDepthWrite = ( ( depthWriteMode == DepthWriteMode::AUTO ) && depthTestEnabled && item.mIsOpaque ) ||
                           ( depthWriteMode == DepthWriteMode::ON );
   context.DepthMask( enableDepthWrite );
 
   // Set up whether or not to read from (test) the depth buffer.
   const DepthTestMode::Type depthTestMode = item.mRenderer->GetDepthTestMode();
   // Most common mode (AUTO) is tested first.
-  bool enableDepthTest = ( ( depthTestMode == DepthTestMode::AUTO ) && isLayer3D ) ||
+  bool enableDepthTest = ( ( depthTestMode == DepthTestMode::AUTO ) && depthTestEnabled ) ||
                          ( depthTestMode == DepthTestMode::ON );
   // Look-up the GL depth function from the Dali::DepthFunction enum, and set it.
   context.DepthFunc( DaliDepthToGLDepthTable[ item.mRenderer->GetDepthFunction() ] );
@@ -167,41 +227,29 @@ inline void ProcessRenderList(
 {
   DALI_PRINT_RENDER_LIST( renderList );
 
-  bool depthTestEnabled = !( renderList.GetSourceLayer()->IsDepthTestDisabled() );
-  bool isLayer3D = renderList.GetSourceLayer()->GetBehavior() == Dali::Layer::LAYER_3D;
+  bool autoDepthTestMode = !( renderList.GetSourceLayer()->IsDepthTestDisabled() ) && renderList.HasColorRenderItems();
+  bool usedStencilBuffer = false;
+  bool stencilManagedByDrawMode = renderList.GetFlags() & RenderList::STENCIL_BUFFER_ENABLED;
 
   SetScissorTest( renderList, context );
-  SetRenderFlags( renderList, context, depthTestEnabled, isLayer3D );
+  SetRenderFlags( renderList, context, autoDepthTestMode );
 
-  // The Layers depth enabled flag overrides the per-renderer depth flags.
-  // So if depth test is disabled at the layer level, we ignore per-render flags.
-  // Note: Overlay renderers will not read or write from the depth buffer.
-  if( DALI_LIKELY( !renderList.HasColorRenderItems() || !depthTestEnabled ) )
+  const size_t count = renderList.Count();
+  for ( size_t index = 0; index < count; ++index )
   {
-    size_t count = renderList.Count();
-    for ( size_t index = 0; index < count; ++index )
-    {
-      const RenderItem& item = renderList.GetItem( index );
-      DALI_PRINT_RENDER_ITEM( item );
-
-      item.mRenderer->Render( context, textureCache, bufferIndex, *item.mNode, defaultShader,
-                              item.mModelMatrix, item.mModelViewMatrix, viewMatrix, projectionMatrix, item.mSize, !item.mIsOpaque );
-    }
-  }
-  else
-  {
-    size_t count = renderList.Count();
-    for ( size_t index = 0; index < count; ++index )
-    {
-      const RenderItem& item = renderList.GetItem( index );
-      DALI_PRINT_RENDER_ITEM( item );
-
-      // Set up the depth buffer based on per-renderer flags.
-      SetupDepthBuffer( item, context, isLayer3D );
-
-      item.mRenderer->Render( context, textureCache, bufferIndex, *item.mNode, defaultShader,
-                              item.mModelMatrix, item.mModelViewMatrix, viewMatrix, projectionMatrix, item.mSize, !item.mIsOpaque );
-    }
+    const RenderItem& item = renderList.GetItem( index );
+    DALI_PRINT_RENDER_ITEM( item );
+
+    // Set up the depth buffer based on per-renderer flags.
+    // If the per renderer flags are set to "ON" or "OFF", they will always override any Layer depth mode or
+    // draw-mode state, such as Overlays.
+    // If the flags are set to "AUTO", the behaviour then depends on the type of renderer. Overlay Renderers will always
+    // disable depth testing and writing. Color Renderers will enable them if the Layer does.
+    SetupDepthBuffer( item, context, autoDepthTestMode );
+    SetupPerRendererFlags( item, context, usedStencilBuffer, stencilManagedByDrawMode );
+
+    item.mRenderer->Render( context, textureCache, bufferIndex, *item.mNode, defaultShader,
+                            item.mModelMatrix, item.mModelViewMatrix, viewMatrix, projectionMatrix, item.mSize, !item.mIsOpaque );
   }
 }