nuclear@0: #ifndef SHADER_H_
nuclear@0: #define SHADER_H_
nuclear@0: 
nuclear@0: #include <vector>
nuclear@0: #include "vmath/vmath.h"
nuclear@0: #include "opengl.h"
nuclear@0: #include "dataset.h"
nuclear@0: 
nuclear@0: class ShaderProg;
nuclear@0: 
nuclear@0: 
nuclear@0: void bind_shader(const ShaderProg *sdr);
nuclear@0: const ShaderProg *get_current_shader();
nuclear@0: 
nuclear@0: 
nuclear@0: class Shader {
nuclear@0: private:
nuclear@0: 	unsigned int sdr;
nuclear@0: 	unsigned int type;
nuclear@0: 	char *name;
nuclear@0: 
nuclear@0: public:
nuclear@0: 	Shader();
nuclear@0: 	~Shader();
nuclear@0: 
nuclear@0: 	unsigned int get_id() const;
nuclear@0: 
nuclear@0: 	void set_name(const char *name);
nuclear@0: 	const char *get_name() const;
nuclear@0: 
nuclear@0: 	bool create(const char *src, unsigned int type);
nuclear@0: 	void destroy();
nuclear@0: 
nuclear@0: 	bool load(const char *fname, unsigned int type);
nuclear@0: };
nuclear@0: 
nuclear@0: #define VSDR(s)		s, GL_VERTEX_SHADER
nuclear@0: #define FSDR(s)		s, GL_FRAGMENT_SHADER
nuclear@0: #define PSDR(s)		FSDR(s)
nuclear@0: #define GSDR(s)		s, GL_GEOMETRY_SHADER
nuclear@0: #define TCSDR(s)	s, GL_TESS_CONTROL_SHADER
nuclear@0: #define TESDR(s)	s, GL_TESS_EVALUATION_SHADER
nuclear@0: 
nuclear@0: class ShaderProg {
nuclear@0: private:
nuclear@0: 	unsigned int prog;
nuclear@0: 	mutable bool must_link;
nuclear@0: 	std::vector<Shader*> shaders;
nuclear@0: 
nuclear@0: 	struct StateLocCache { int sidx, loc; };
nuclear@0: 	/** a cache of all st_ prefixed uniform locations and their corresponding
nuclear@0: 	 * index in the global uniform state vector (see unistate.h)
nuclear@0: 	 */
nuclear@0: 	mutable std::vector<StateLocCache> stloc_cache;
nuclear@0: 
nuclear@0: 	void cache_state_uniforms() const;
nuclear@0: 	void setup_state_uniforms() const;
nuclear@0: 
nuclear@0: public:
nuclear@0: 	static ShaderProg *current;
nuclear@0: 
nuclear@0: 	ShaderProg();
nuclear@0: 	~ShaderProg();
nuclear@0: 
nuclear@0: 	/// returns the OpenGL object id for this shader program
nuclear@0: 	unsigned int get_id() const;
nuclear@0: 
nuclear@0: 	/** takes a series of shaders, and constructs a program object by linking
nuclear@0: 	 * them together. Terminate with a null pointer (don't use 0!) */
nuclear@0: 	bool create(Shader *sdr, ...);
nuclear@0: 	/// same as above, but with a va_list instead of variable arguments.
nuclear@0: 	bool create(Shader *sdr, va_list ap);
nuclear@0: 	/** takes two shaders (vertex and pixel) and constructs a program object by
nuclear@0: 	 * linking them together. Either one can be null. */
nuclear@0: 	bool create(Shader *vsdr, Shader *psdr);
nuclear@0: 
nuclear@0: 	/** takes a series of shader source/shader type pairs and constructs a program
nuclear@0: 	 * object by linking them together. Terminate with a null pointer (don't use 0!)
nuclear@0: 	 * You can use the VSDR, PSDR, GSDR, TCSDR, TESDR convenience macros for passing
nuclear@0: 	 * the pairs.
nuclear@0: 	 * Example: create(VSDR(vsrc0), VSDR(vsrc1), PSDR(psrc), NULL);
nuclear@0: 	 */
nuclear@0: 	bool create(const char *src, unsigned int type, ...);
nuclear@0: 	/// same as above, but with a va_list instead of variable arguments.
nuclear@0: 	bool create(const char *src, unsigned int type, va_list ap);
nuclear@0: 	/** takes two shaders source strings (vertex and pixel) and constructs
nuclear@0: 	 * a program object by linking them together. Either one can be null. */
nuclear@0: 	bool create(const char *vsrc, const char *psrc);
nuclear@0: 
nuclear@0: 	void destroy();
nuclear@0: 
nuclear@0: 	/** takes a series of shader filename/shader type pairs, loads the shaders and
nuclear@0: 	 * constructs a program object by linking them together. Terminate with a null
nuclear@0: 	 * pointer (don't use 0!). You can use the VSDR, PSDR, GSDR, TCSDR, TESDR convenience
nuclear@0: 	 * macros for passing the pairs.
nuclear@0: 	 * Example: load(VSDR("vsdr1.glsl"), VSDR("vsdr2.glsl"), PSDR("pixel.glsl"), NULL);
nuclear@0: 	 */
nuclear@0: 	bool load(const char *fname, unsigned int type, ...);
nuclear@0: 	/// same as above, but with a va_list instead of variable arguments.
nuclear@0: 	bool load(const char *fname, unsigned int type, va_list ap);
nuclear@0: 	/** takes the filenames of two shader files (vertex and pixel), loads them and
nuclear@0: 	 * constructs a program object by linking them together. Either one can be null */
nuclear@0: 	bool load(const char *vsrc, const char *psrc);
nuclear@0: 
nuclear@0: 	void add_shader(Shader *sdr);
nuclear@0: 	bool link() const;
nuclear@0: 
nuclear@0: 	void bind() const;
nuclear@0: 
nuclear@0: 	int get_attrib_location(const char *name) const;
nuclear@0: 	void set_attrib_location(const char *name, int loc) const;
nuclear@0: 
nuclear@0: 	int get_uniform_location(const char *name) const;
nuclear@0: 
nuclear@0: 	bool set_uniform(int loc, int val) const;
nuclear@0: 	bool set_uniform(int loc, float val) const;
nuclear@0: 	bool set_uniform(int loc, const Vector2 &v) const;
nuclear@0: 	bool set_uniform(int loc, const Vector3 &v) const;
nuclear@0: 	bool set_uniform(int loc, const Vector4 &v) const;
nuclear@0: 	bool set_uniform(int loc, const Matrix3x3 &m) const;
nuclear@0: 	bool set_uniform(int loc, const Matrix4x4 &m) const;
nuclear@0: 
nuclear@0: 	bool set_uniform(const char *name, int val) const;
nuclear@0: 	bool set_uniform(const char *name, float val) const;
nuclear@0: 	bool set_uniform(const char *name, const Vector2 &v) const;
nuclear@0: 	bool set_uniform(const char *name, const Vector3 &v) const;
nuclear@0: 	bool set_uniform(const char *name, const Vector4 &v) const;
nuclear@0: 	bool set_uniform(const char *name, const Matrix3x3 &m) const;
nuclear@0: 	bool set_uniform(const char *name, const Matrix4x4 &m) const;
nuclear@0: 
nuclear@0: 	friend void setup_unistate(const ShaderProg*);
nuclear@0: };
nuclear@0: 
nuclear@0: class ShaderSet : public DataSet<Shader*> {
nuclear@0: private:
nuclear@0: 	unsigned int type;
nuclear@0: 
nuclear@0: public:
nuclear@0: 	ShaderSet(unsigned int type);
nuclear@0: };
nuclear@0: 
nuclear@0: #endif	// SHADER_H_