The GtkRadiant sources as originally released under the GPL license.

include/ishaders.h

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+/*
+Copyright (C) 1999-2006 Id Software, Inc. and contributors.
+For a list of contributors, see the accompanying CONTRIBUTORS file.
+
+This file is part of GtkRadiant.
+
+GtkRadiant is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+GtkRadiant is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GtkRadiant; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#if !defined(INCLUDED_ISHADERS_H)
+#define INCLUDED_ISHADERS_H
+
+#include "generic/constant.h"
+
+enum
+{
+  QER_TRANS = 1 << 0,
+  QER_NOCARVE = 1 << 1,
+  QER_NODRAW = 1 << 2,
+  QER_NONSOLID = 1 << 3,
+  QER_WATER = 1 << 4,
+  QER_LAVA = 1 << 5,
+  QER_FOG = 1 << 6,
+  QER_ALPHATEST = 1 << 7,
+  QER_CULL = 1 << 8,
+  QER_AREAPORTAL = 1 << 9,
+  QER_CLIP = 1 << 10,
+  QER_BOTCLIP = 1 << 11,
+};
+
+struct qtexture_t;
+
+template<typename Element> class BasicVector3;
+typedef BasicVector3<float> Vector3;
+typedef Vector3 Colour3;
+
+typedef unsigned char BlendFactor;
+const BlendFactor BLEND_ZERO = 0;
+const BlendFactor BLEND_ONE = 1;
+const BlendFactor BLEND_SRC_COLOUR = 2;
+const BlendFactor BLEND_ONE_MINUS_SRC_COLOUR = 3;
+const BlendFactor BLEND_SRC_ALPHA = 4;
+const BlendFactor BLEND_ONE_MINUS_SRC_ALPHA = 5;
+const BlendFactor BLEND_DST_COLOUR = 6;
+const BlendFactor BLEND_ONE_MINUS_DST_COLOUR = 7;
+const BlendFactor BLEND_DST_ALPHA = 8;
+const BlendFactor BLEND_ONE_MINUS_DST_ALPHA = 9;
+const BlendFactor BLEND_SRC_ALPHA_SATURATE = 10;
+
+class BlendFunc
+{
+public:
+  BlendFunc(BlendFactor src, BlendFactor dst) : m_src(src), m_dst(dst)
+  {
+  }
+  BlendFactor m_src;
+  BlendFactor m_dst;
+};
+
+class ShaderLayer
+{
+public:
+  virtual qtexture_t* texture() const = 0;
+  virtual BlendFunc blendFunc() const = 0;
+  virtual bool clampToBorder() const = 0;
+  virtual float alphaTest() const = 0;
+};
+
+template<typename FirstArgument>
+class Callback1;
+typedef Callback1<const ShaderLayer&> ShaderLayerCallback;
+
+
+class IShader
+{
+public:
+  enum EAlphaFunc
+  {
+    eAlways,
+    eEqual,
+    eLess,
+    eGreater,
+    eLEqual,
+    eGEqual,
+  };
+  enum ECull
+  {
+    eCullNone,
+    eCullBack,
+  };
+  // Increment the number of references to this object
+  virtual void IncRef() = 0;
+  // Decrement the reference count
+  virtual void DecRef() = 0;
+  // get/set the qtexture_t* Radiant uses to represent this shader object
+  virtual qtexture_t* getTexture() const = 0;
+  virtual qtexture_t* getDiffuse() const = 0;
+  virtual qtexture_t* getBump() const = 0;
+  virtual qtexture_t* getSpecular() const = 0;
+  // get shader name
+  virtual const char* getName() const = 0;
+  virtual bool IsInUse() const = 0;
+  virtual void SetInUse(bool bInUse) = 0;
+  // get the editor flags (QER_NOCARVE QER_TRANS)
+  virtual int getFlags() const = 0;
+  // get the transparency value
+  virtual float getTrans() const = 0;
+  // test if it's a true shader, or a default shader created to wrap around a texture
+  virtual bool IsDefault() const = 0;
+  // get the alphaFunc
+  virtual void getAlphaFunc(EAlphaFunc *func, float *ref) = 0;
+  virtual BlendFunc getBlendFunc() const = 0;
+  // get the cull type
+  virtual ECull getCull() = 0;
+  // get shader file name (ie the file where this one is defined)
+  virtual const char* getShaderFileName() const = 0;
+
+  virtual const ShaderLayer* firstLayer() const = 0;
+  virtual void forEachLayer(const ShaderLayerCallback& layer) const = 0;
+
+  virtual qtexture_t* lightFalloffImage() const = 0;
+};
+
+class Callback;
+typedef struct _GSList GSList;
+typedef Callback1<const char*> ShaderNameCallback;
+
+class ModuleObserver;
+
+class ShaderSystem
+{
+public:
+  INTEGER_CONSTANT(Version, 1);
+  STRING_CONSTANT(Name, "shaders");
+  // NOTE: shader and texture names used must be full path.
+  // Shaders usable as textures have prefix equal to getTexturePrefix()
+
+  virtual void realise() = 0;
+  virtual void unrealise() = 0;
+  virtual void refresh() = 0;
+  // activate the shader for a given name and return it
+  // will return the default shader if name is not found
+  virtual IShader* getShaderForName(const char* name) = 0;
+
+  virtual void foreachShaderName(const ShaderNameCallback& callback) = 0;
+
+  // iterate over the list of active shaders
+  virtual void beginActiveShadersIterator() = 0;
+  virtual bool endActiveShadersIterator() = 0;
+  virtual IShader* dereferenceActiveShadersIterator() = 0;
+  virtual void incrementActiveShadersIterator() = 0;
+
+  virtual void setActiveShadersChangedNotify(const Callback& notify) = 0;
+
+  virtual void attach(ModuleObserver& observer) = 0;
+  virtual void detach(ModuleObserver& observer) = 0;
+
+  virtual void setLightingEnabled(bool enabled) = 0;
+
+  virtual const char* getTexturePrefix() const = 0;
+};
+
+#include "modulesystem.h"
+
+template<typename Type>
+class GlobalModule;
+typedef GlobalModule<ShaderSystem> GlobalShadersModule;
+
+template<typename Type>
+class GlobalModuleRef;
+typedef GlobalModuleRef<ShaderSystem> GlobalShadersModuleRef;
+
+inline ShaderSystem& GlobalShaderSystem()
+{
+  return GlobalShadersModule::getTable();
+}
+
+
+#define QERApp_Shader_ForName GlobalShaderSystem().getShaderForName
+#define QERApp_ActiveShaders_IteratorBegin GlobalShaderSystem().beginActiveShadersIterator
+#define QERApp_ActiveShaders_IteratorAtEnd GlobalShaderSystem().endActiveShadersIterator
+#define QERApp_ActiveShaders_IteratorCurrent GlobalShaderSystem().dereferenceActiveShadersIterator
+#define QERApp_ActiveShaders_IteratorIncrement GlobalShaderSystem().incrementActiveShadersIterator
+
+#endif