Merging r5975 through r6036 from trunk to ogl-es branch.

GLES drivers adapted, but only did make compile-tests.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@6038 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/COpenGLShaderMaterialRenderer.h

@@ -0,0 +1,97 @@
+// Copyright (C) 2002-2012 Nikolaus Gebhardt
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in irrlicht.h
+
+#ifndef __C_OPENGL_SHADER_MATERIAL_RENDERER_H_INCLUDED__
+#define __C_OPENGL_SHADER_MATERIAL_RENDERER_H_INCLUDED__
+
+#include "IrrCompileConfig.h"
+
+#ifdef _IRR_COMPILE_WITH_OPENGL_
+
+#include "IMaterialRenderer.h"
+
+#include "COpenGLCommon.h"
+
+namespace irr
+{
+namespace video
+{
+
+class COpenGLDriver;
+class IShaderConstantSetCallBack;
+
+//! Class for using vertex and pixel shaders with OpenGL (asm not glsl!)
+class COpenGLShaderMaterialRenderer : public IMaterialRenderer
+{
+public:
+
+	//! Constructor
+	COpenGLShaderMaterialRenderer(COpenGLDriver* driver,
+		s32& outMaterialTypeNr, const c8* vertexShaderProgram, const c8* pixelShaderProgram,
+		IShaderConstantSetCallBack* callback, E_MATERIAL_TYPE baseMaterial, s32 userData);
+
+	//! Destructor
+	virtual ~COpenGLShaderMaterialRenderer();
+
+	virtual void OnSetMaterial(const SMaterial& material, const SMaterial& lastMaterial,
+		bool resetAllRenderstates, IMaterialRendererServices* services) _IRR_OVERRIDE_;
+
+	virtual bool OnRender(IMaterialRendererServices* service, E_VERTEX_TYPE vtxtype) _IRR_OVERRIDE_;
+
+	virtual void OnUnsetMaterial() _IRR_OVERRIDE_;
+
+	//! Returns if the material is transparent.
+	virtual bool isTransparent() const _IRR_OVERRIDE_;
+
+	//! Access the callback provided by the users when creating shader materials
+	virtual IShaderConstantSetCallBack* getShaderConstantSetCallBack() const _IRR_OVERRIDE_
+	{ 
+		return CallBack;
+	}
+
+protected:
+
+	//! constructor only for use by derived classes who want to
+	//! create a fall back material for example.
+	COpenGLShaderMaterialRenderer(COpenGLDriver* driver,
+					IShaderConstantSetCallBack* callback,
+					E_MATERIAL_TYPE baseMaterial, s32 userData=0);
+
+	// must not be called more than once!
+	void init(s32& outMaterialTypeNr, const c8* vertexShaderProgram,
+		const c8* pixelShaderProgram, E_VERTEX_TYPE type);
+
+	bool createPixelShader(const c8* pxsh);
+	bool createVertexShader(const c8* vtxsh);
+	bool checkError(const irr::c8* type);
+
+	COpenGLDriver* Driver;
+	IShaderConstantSetCallBack* CallBack;
+
+	// I didn't write this, but here's my understanding:
+	// Those flags seem to be exclusive so far (so could be an enum). 
+	// Maybe the idea was to make them non-exclusive in future (basically having a shader-material)
+	// Actually currently there's not even any need to cache them (probably even slower than not doing so).
+	// They seem to be mostly for downward compatibility. 
+	// I suppose the idea is to use SMaterial.BlendOperation + SMaterial.BlendFactor and a simple non-transparent type as base for more flexibility in the future.
+	// Note that SMaterial.BlendOperation + SMaterial.BlendFactor are in some drivers already evaluated before OnSetMaterial.
+	bool Alpha;
+	bool Blending;
+	bool FixedBlending;
+	bool AlphaTest;
+
+	GLuint VertexShader;
+	// We have 4 values here, [0] is the non-fog version, the other three are
+	// ARB_fog_linear, ARB_fog_exp, and ARB_fog_exp2 in that order
+	core::array<GLuint> PixelShader;
+	s32 UserData;
+};
+
+
+} // end namespace video
+} // end namespace irr
+
+#endif
+#endif
+