X-Git-Url: http://git.dev.opencascade.org/gitweb/?p=occt.git;a=blobdiff_plain;f=src%2FShaders%2FDeclarations.glsl;h=0f5ba703b86c3f67283da748925d375e6e1f52e6;hp=929d9093d15289ecfdb4b5a3a336f476a35ce3e0;hb=b17e5bae1a46be4042d3cd3530ff45e43b32613a;hpb=12d71ad6a5b8aa8eef3429f619b1eaa089f1a051

diff --git a/src/Shaders/Declarations.glsl b/src/Shaders/Declarations.glsl
index 929d9093d1..0f5ba703b8 100644
--- a/src/Shaders/Declarations.glsl
+++ b/src/Shaders/Declarations.glsl
@@ -24,6 +24,10 @@
 //! Specifies the length of array of clipping planes, which is 8 by default. Defined by Shader Manager.
 // #define THE_MAX_CLIP_PLANES 8
 
+//! @def THE_NB_FRAG_OUTPUTS
+//! Specifies the length of array of Fragment Shader outputs, which is 1 by default. Defined by Shader Manager.
+// #define THE_NB_FRAG_OUTPUTS 1
+
 // compatibility macros
 #if (__VERSION__ >= 130)
   #define THE_ATTRIBUTE  in
@@ -58,20 +62,43 @@
 #elif defined(FRAGMENT_SHADER)
   #if (__VERSION__ >= 130)
     #ifdef OCC_ENABLE_draw_buffers
-      out vec4 occFragColorArray[2];
-      #define occFragColor    occFragColorArray[0]
-      #define occFragCoverage occFragColorArray[1]
+      out vec4 occFragColorArray[THE_NB_FRAG_OUTPUTS];
+      #define occFragColorArrayAlias occFragColorArray
+      #define occFragColor0 occFragColorArray[0]
     #else
-      out vec4 occFragColor;
+      out vec4 occFragColor0;
     #endif
   #else
     #ifdef OCC_ENABLE_draw_buffers
-      #define occFragColor    gl_FragData[0]
-      #define occFragCoverage gl_FragData[1]
+      #define occFragColorArrayAlias gl_FragData
+      #define occFragColor0 gl_FragData[0]
     #else
-      #define occFragColor gl_FragColor
+      #define occFragColor0 gl_FragColor
     #endif
   #endif
+
+  #if (THE_NB_FRAG_OUTPUTS >= 2)
+    #define occFragColor1 occFragColorArrayAlias[1]
+  #else
+    vec4 occFragColor1;
+  #endif
+  #if (THE_NB_FRAG_OUTPUTS >= 3)
+    #define occFragColor2 occFragColorArrayAlias[2]
+  #else
+    vec4 occFragColor2;
+  #endif
+  #if (THE_NB_FRAG_OUTPUTS >= 4)
+    #define occFragColor3 occFragColorArrayAlias[3]
+  #else
+    vec4 occFragColor3;
+  #endif
+
+  // Built-in outputs notation
+  #define occFragColor    occFragColor0
+  #define occFragCoverage occFragColor1
+
+  //! Define the main Fragment Shader output - color value.
+  void occSetFragColor (in vec4 theColor);
 #endif
 
 // Matrix state