GL3: Remove GL_MAX_TEXTURE_UNITS_ARB

--HG--
branch : opengl3

code/nel/src/3d/driver/opengl3/driver_opengl.h

@@ -1340,7 +1340,7 @@ private:
 	// @}
 
 	/// Same as getNbTextureStages(), but faster because inline, and not virtual!!
-	uint			inlGetNumTextStages() const { return _Extensions.NbTextureStages; }
+	uint inlGetNumTextStages() const { return _Extensions.NbFragmentTextureUnits; }
 
 
 	NLMISC::CRGBA					_CurrentBlendConstantColor;

code/nel/src/3d/driver/opengl3/driver_opengl_extension.cpp

@@ -835,17 +835,14 @@ void	registerGlExtensions(CGlExtensions &ext)
 		glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &ext.EXTTextureFilterAnisotropicMaximum);
 	}
 
+	GLint nbFragmentTextureUnits;
+	glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &nbFragmentTextureUnits);
+	ext.NbFragmentTextureUnits = (nbFragmentTextureUnits > IDRV_MAT_MAXTEXTURES) ? IDRV_MAT_MAXTEXTURES : nbFragmentTextureUnits; // FIXME GL3
+
 	// ---
 
 	// Check ARBMultiTexture
 	ext.ARBMultiTexture= setupARBMultiTexture(glext);
-	if (ext.ARBMultiTexture)
-	{
-		glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &ntext);
-		// We could have more than IDRV_MAT_MAXTEXTURES but the interface only
-		// support IDRV_MAT_MAXTEXTURES texture stages so take min
-		ext.NbTextureStages= (ntext<((GLint)IDRV_MAT_MAXTEXTURES)?ntext:IDRV_MAT_MAXTEXTURES);
-	}
 
 	// Check ARBMultisample
 	ext.ARBMultisample = setupARBMultisample(glext);

code/nel/src/3d/driver/opengl3/driver_opengl_extension.h

@@ -38,6 +38,7 @@ struct	CGlExtensions
 	// Required extensions
 	bool	GLCore;
 	bool	ARBSeparateShaderObjects;
+	uint	NbFragmentTextureUnits;
 
 	// Optional extensions
 	bool	EXTTextureCompressionS3TC;
@@ -46,7 +47,7 @@ struct	CGlExtensions
 
 	// Required Extensions. (old)
 	bool	ARBMultiTexture;
-	uint	NbTextureStages;
+	// uint	NbTextureStages;
 
 	// Optional Extensions. (old)
 	bool	EXTSecondaryColor;
@@ -67,20 +68,26 @@ public:
 	CGlExtensions()
 	{
 		// Fill all false by default.
-		ARBMultiTexture= false;
-		NbTextureStages= 1;
+		GLCore = false;
+		ARBSeparateShaderObjects = false;
+		NbFragmentTextureUnits = 0;
+
 		EXTTextureCompressionS3TC = false;
+		EXTTextureFilterAnisotropic = false;
+		EXTTextureFilterAnisotropicMaximum = 0.f;
+
+		ARBMultiTexture= false;
 		EXTSecondaryColor= false;
+		EXTBlendColor= false;
+		ARBMultisample = false;
+
 		WGLARBPBuffer = false;
 		WGLARBPixelFormat = false;
 		WGLEXTSwapControl = false;
+
 		GLXEXTSwapControl = false;
 		GLXSGISwapControl = false;
 		GLXMESASwapControl = false;
-		EXTBlendColor= false;
-		EXTTextureFilterAnisotropic = false;
-		EXTTextureFilterAnisotropicMaximum = 0.f;
-		ARBMultisample = false;
 	}
 
 	std::string toString()
@@ -89,12 +96,16 @@ public:
 		result += GLVersion;
 		result += "; Available extensions:";
 
+		result += "\n  Required: ";
+		result += GLCore ? "GLCore " : "";
+		result += ARBSeparateShaderObjects ? "ARBSeparateShaderObjects " : "";
+
 		result += "\n  Texturing: ";
 		result += ARBMultiTexture ? "ARBMultiTexture " : "";
 		result += EXTTextureCompressionS3TC ? "EXTTextureCompressionS3TC " : "";
 		result += EXTTextureFilterAnisotropic ? "EXTTextureFilterAnisotropic (Maximum = " + NLMISC::toString(EXTTextureFilterAnisotropicMaximum) + ") " : "";
 		result += "texture stages(*) = ";
-		result += NLMISC::toString(NbTextureStages);
+		result += NLMISC::toString(NbFragmentTextureUnits);
 
 		result += "\n  Misc:      ";
 		result += EXTSecondaryColor ? "EXTSecondaryColor " : "";