GLSLShader.h 6.85 KB
Newer Older
Pierre Kraemer's avatar
Pierre Kraemer committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
/*******************************************************************************
* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
* version 0.1                                                                  *
* Copyright (C) 2009, IGG Team, LSIIT, University of Strasbourg                *
*                                                                              *
* This library is free software; you can redistribute it and/or modify it      *
* under the terms of the GNU Lesser General Public License as published by the *
* Free Software Foundation; either version 2.1 of the License, or (at your     *
* option) any later version.                                                   *
*                                                                              *
* This library 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 Lesser General Public License  *
* for more details.                                                            *
*                                                                              *
* You should have received a copy of the GNU Lesser General Public License     *
* along with this library; if not, write to the Free Software Foundation,      *
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.           *
*                                                                              *
* Web site: https://iggservis.u-strasbg.fr/CGoGN/                              *
* Contact information: cgogn@unistra.fr                                        *
*                                                                              *
*******************************************************************************/

/***********************************************
*  Thanks to Frederic Larue for this class
***********************************************/

#ifndef __KLIB__GLSHADER__12052005__
#define __KLIB__GLSHADER__12052005__

#include "Utils/os_spec.h"

#include <GL/glew.h>


//#include <GL/glut.h>

#include <map>
#include <stdlib.h>
#include <string>

namespace CGoGN
{

namespace Utils
{


////////// CLASS DECLARATION //////////

52
class GLSLShader
Pierre Kraemer's avatar
Pierre Kraemer committed
53 54
{

55 56 57 58 59
public:
	/**
	 * enum of supported shader type
	 */
	enum shaderType {VERTEX_SHADER = 1, FRAGMENT_SHADER = 2, GEOMETRY_SHADER = 3 };
Pierre Kraemer's avatar
Pierre Kraemer committed
60 61 62


protected:
63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
	/**
	 * handle of vertex shader
	 */
	GLhandleARB	m_vertex_shader_object;

	/**
	 * handle of fragment shader
	 */
	GLhandleARB	m_fragment_shader_object;

	/**
	 * handle of geometry shader
	 */
	GLhandleARB	m_geom_shader_object;

	/**
	 * handle of program
	 */
	GLhandleARB m_program_object;


	/**
	 * load vertex shader
	 * @param vertex_shader_source src text shader
	 */
	bool loadVertexShaderSourceString( const char* vertex_shader_source );

	/**
	 * load fragment shader
	 * @param fragment_shader_source src text shader
	 */
	bool loadFragmentShaderSourceString( const char* fragment_shader_source );

	/**
	 * load geometry shader
	 * @param geom_shader_source src text shader
	 */
	bool loadGeometryShaderSourceString( const char* geom_shader_source );
Pierre Kraemer's avatar
Pierre Kraemer committed
101

102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141
	/**
	 * load vertex shader
	 * @param filename file name
	 */
	bool loadVertexShader( const std::string& filename );

	/**
	 * load fragment shader
	 * @param filename file name
	 */
	bool loadFragmentShader( const std::string& filename );

	/**
	 * load geometry shader
	 * @param filename file name
	 */
	bool  loadGeometryShader( const std::string& filename );

	/**
	 * Load of source file in a char buffer
	 * @param source_file file name
	 */
	char* loadSourceFile( const std::string& source_file );

	/**
	 * create the shader (attach and link shaders into program)
	 */
	bool create(GLint inputGeometryPrimitive=GL_TRIANGLES,GLint outputGeometryPrimitive=GL_TRIANGLES);

	/*
	 * search file in different path
	 */
	std::string findFile(const std::string filename);

	/**
	 * get log after compiling
	 * @param obj what log do you want ?
	 * @return the log
	 */
	char* getInfoLog( GLhandleARB obj );
Pierre Kraemer's avatar
Pierre Kraemer committed
142 143 144


public:
145 146 147
	/**
	 * constructor
	 */
Pierre Kraemer's avatar
Pierre Kraemer committed
148 149 150
	GLSLShader();


151 152 153 154
	/**
	 * destructor
	 */
	virtual ~GLSLShader();
Pierre Kraemer's avatar
Pierre Kraemer committed
155 156


157 158 159 160
	/**
	 * test support of shader
	 */
	static bool	areShadersSupported();
Pierre Kraemer's avatar
Pierre Kraemer committed
161

162 163 164 165 166 167 168 169 170
	/**
	 * test support of Vertex Buffer Object
	 */
	static bool	areVBOSupported();

	/**
	 * test support of geometry shader
	 */
	static bool	areGeometryShadersSupported();
Pierre Kraemer's avatar
Pierre Kraemer committed
171

172 173 174 175
	/**
	 * test support of gl3
	 */
	static bool	isGL3Supported();
Pierre Kraemer's avatar
Pierre Kraemer committed
176 177


178
	static bool init();
Pierre Kraemer's avatar
Pierre Kraemer committed
179 180


181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196
	/**
	 * load shaders (compile and link)
	 * @param vs vertex shader source file
	 * @param fs fragment shader source file
	 */
	bool loadShaders(const std::string& vs, const std::string& fs);

	/**
	 * load shaders (compile and link)
	 * @param vs vertex shader source file
	 * @param fs fragment shader source file
	 * @param fs fragment shader source file
	 * @param inputGeometryPrimitive primitives used in geometry shader as input
	 * @param outputGeometryPrimitive primitives generated in geometry shader as output
	 */
	bool loadShaders(const std::string& vs, const std::string& fs, const std::string& gs, GLint inputGeometryPrimitive=GL_TRIANGLES,GLint outputGeometryPrimitive=GL_TRIANGLES);
Pierre Kraemer's avatar
Pierre Kraemer committed
197 198 199


	inline bool		isCreated();
200

Pierre Kraemer's avatar
Pierre Kraemer committed
201 202 203
	bool			isBinded();

	virtual bool	bind();
204

Pierre Kraemer's avatar
Pierre Kraemer committed
205 206 207
	virtual void	unbind();


208
	GLuint 	getAttribIndex( char* attribName );
Pierre Kraemer's avatar
Pierre Kraemer committed
209 210

	
211 212 213 214
	/**
	 * get handler of program for external use og gl functions
	 */
	GLuint program_handler() { return m_program_object;}
Pierre Kraemer's avatar
Pierre Kraemer committed
215 216
	

217 218 219 220
	/**
	 * bind vertex attribute with its name in shaders
	 */
	void bindAttrib(unsigned int att, const char* name);
Pierre Kraemer's avatar
Pierre Kraemer committed
221

222 223 224 225 226 227 228

	bool validateProgram();

	bool checkProgram();

	bool checkShader(int shaderType);

Pierre Kraemer's avatar
Pierre Kraemer committed
229
public:
230 231 232


	template<unsigned int NB>
233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252
	void setuniformf( const char* name , float* val);

	template<unsigned int NB>
	void setuniformi( const char* name , int* val);
};


////////// INLINE FUNCTIONS //////////


inline bool GLSLShader::isCreated()
{
	return ( m_program_object != 0 );
}

template<unsigned int NB>
void GLSLShader::setuniformf( const char* name , float* val)
{
	GLint uni = glGetUniformLocationARB(m_program_object,name);
	if (uni>=0)
253 254 255 256 257 258 259
	{
		switch(NB)
		{
		case 1:
			glUniform1fvARB( uni, 1, val) ;
			break;
		case 2:
260
			glUniform2fvARB( uni, 1, val) ;
261 262
			break;
		case 3:
263
			glUniform3fvARB( uni, 1, val) ;
264 265
			break;
		case 4:
266 267 268 269
			glUniform4fvARB( uni, 1, val) ;
			break;
		case 16:
			glUniformMatrix4fv(uni, 1 , false, val);
270 271 272
			break;
		}
	}
273
}
274

275 276 277 278 279
template<unsigned int NB>
void GLSLShader::setuniformi( const char* name , int* val)
{
	GLint uni = glGetUniformLocationARB(m_program_object,name);
	if (uni>=0)
280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296
	{
		switch(NB)
		{
		case 1:
			glUniform1ivARB( uni, 1, val) ;
			break;
		case 2:
			glUniform2ivARB( uni, 2, val) ;
			break;
		case 3:
			glUniform3ivARB( uni, 3, val) ;
			break;
		case 4:
			glUniform4ivARB( uni, 4, val) ;
			break;
		}
	}
Pierre Kraemer's avatar
Pierre Kraemer committed
297 298 299 300
}



301 302 303


} //namespace Utils
Pierre Kraemer's avatar
Pierre Kraemer committed
304 305 306 307 308 309
} //namespace CGoGN




#endif /*__KLIB__GLSHADER__12052005__*/