src/VTKViewer/VTKViewer_OpenGLHelper.h

   1 // Copyright (C) 2007-2016  CEA/DEN, EDF R&D, OPEN CASCADE
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  18 //
  19
  20 #ifndef VTKVIEWER_OPENGLHELPER_H
  21 #define VTKVIEWER_OPENGLHELPER_H
  22
  23 #include <vtkObject.h>
  24 #include <vtkMatrix4x4.h>
  25 #include "VTKViewer.h"
  26
  27 #ifdef WIN32
  28 #include <windows.h>
  29 #endif
  30
  31 #include <GL/gl.h>
  32
  33
  34 #ifndef GL_ARB_shader_objects
  35 typedef GLuint GLhandleARB;
  36 #endif
  37
  38 #ifndef APIENTRY
  39 #define APIENTRY
  40 #endif
  41 #ifndef APIENTRYP
  42 #define APIENTRYP APIENTRY *
  43 #endif
  44
  45 #ifndef GL_ARB_shader_objects
  46 typedef char GLcharARB;
  47 #endif
  48
  49 #ifndef GL_VERTEX_PROGRAM_POINT_SIZE_ARB
  50 #define GL_VERTEX_PROGRAM_POINT_SIZE_ARB  0x8642
  51 #endif
  52
  53 #ifndef GL_VERTEX_SHADER_ARB
  54 #define GL_VERTEX_SHADER_ARB              0x8B31
  55 #endif
  56
  57 #ifndef GL_FRAGMENT_SHADER_ARB
  58 #define GL_FRAGMENT_SHADER_ARB            0x8B30
  59 #endif
  60
  61 #ifndef GL_ARB_point_sprite
  62 #define GL_POINT_SPRITE_ARB               0x8861
  63 #define GL_COORD_REPLACE_ARB              0x8862
  64 #endif
  65
  66 #ifndef GL_ARB_vertex_buffer_object
  67 typedef ptrdiff_t GLsizeiptrARB;
  68
  69 #define GL_ARRAY_BUFFER_ARB               0x8892
  70 #define GL_STATIC_DRAW_ARB                0x88E4
  71 #endif
  72
  73
  74 namespace GUI_OPENGL {
  75 char* readFromFile( std::string fileName );
  76 }
  77
  78 class VTKVIEWER_EXPORT VTKViewer_OpenGLHelper
  79 {
  80 public:
  81   VTKViewer_OpenGLHelper();
  82   ~VTKViewer_OpenGLHelper();
  83
  84   void Init();
  85
  86   bool IsInitialized() const { return mIsInitialized; }
  87
  88 public:
  89   bool CreateShaderProgram (const std::string& theFilePath,
  90                             GLhandleARB&       theProgram,
  91                             GLhandleARB&       theVertexShader,
  92                             GLhandleARB&       theFragmentShader) const;
  93
  94   void DestroyShaderProgram (GLhandleARB theProgram,
  95                              GLhandleARB theVertexShader,
  96                              GLhandleARB theFragmentShader) const;
  97 #ifdef VTK_OPENGL2
  98   void SetUniformMatrix (const GLint         theLocation,
  99                          const vtkMatrix4x4* theMatrix) const;
 100 #endif
 101
 102 protected:
 103   typedef void        (APIENTRYP PFNGLSHADERSOURCEARBPROC)             (GLhandleARB shaderObj, GLsizei count, const GLcharARB* *string, const GLint *length);
 104   typedef GLhandleARB (APIENTRYP PFNGLCREATESHADEROBJECTARBPROC)       (GLenum shaderType);
 105   typedef void        (APIENTRYP PFNGLBINDBUFFERARBPROC)               (GLenum target, GLuint buffer);
 106   typedef void        (APIENTRYP PFNGLDELETEBUFFERSARBPROC)            (GLsizei n, const GLuint *buffers);
 107   typedef void        (APIENTRYP PFNGLGENBUFFERSARBPROC)               (GLsizei n, GLuint *buffers);
 108   typedef void        (APIENTRYP PFNGLBUFFERDATAARBPROC)               (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage);
 109   typedef void        (APIENTRYP PFNGLCOMPILESHADERARBPROC)            (GLhandleARB shaderObj);
 110   typedef GLhandleARB (APIENTRYP PFNGLCREATEPROGRAMOBJECTARBPROC)      (void);
 111   typedef void        (APIENTRYP PFNGLATTACHOBJECTARBPROC)             (GLhandleARB containerObj, GLhandleARB obj);
 112   typedef void        (APIENTRYP PFNGLLINKPROGRAMARBPROC)              (GLhandleARB programObj);
 113   typedef void        (APIENTRYP PFNGLUSEPROGRAMOBJECTARBPROC)         (GLhandleARB programObj);
 114   typedef GLint       (APIENTRYP PFNGLGETATTRIBLOCATIONARBPROC)        (GLhandleARB programObj, const GLcharARB *name);
 115   typedef void        (APIENTRYP PFNGLVERTEXATTRIBPOINTERARBPROC)      (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
 116   typedef void        (APIENTRYP PFNGLENABLEVERTEXATTRIBARRAYARBPROC)  (GLuint index);
 117   typedef void        (APIENTRYP PFNGLDISABLEVERTEXATTRIBARRAYARBPROC) (GLuint index);
 118
 119 #ifdef VTK_OPENGL2
 120   typedef void        (APIENTRYP PFNGLDETACHOBJECTARBPROC)             (GLhandleARB containerObj, GLhandleARB obj);
 121   typedef void        (APIENTRYP PFNGLDELETEOBJECTARBPROC)             (GLhandleARB obj);
 122   typedef void        (APIENTRYP PFNGLVALIDATEPROGRAMARBPROC)          (GLhandleARB program);
 123   typedef GLint       (APIENTRYP PFNGLGETUNIFORMLOCATIONARBPROC)       (GLhandleARB program, const GLcharARB *name );
 124   typedef void        (APIENTRYP PFNGLGETSHADERIVARBPROC)              (GLuint shader, GLenum pname, GLint *params);
 125   typedef void        (APIENTRYP PFNGLGETPROGRAMIVARBPROC)             (GLuint program, GLenum pname, GLint *params);
 126   typedef void        (APIENTRYP PFNGLGETSHADERINFOLOGARBPROC)         (GLuint shader, GLsizei maxLength, GLsizei *length, GLchar *infoLog);
 127   typedef void        (APIENTRYP PFNGLUNIFORMMATRIX4FVARBPROC)         (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
 128   typedef void        (APIENTRYP PFNGLGENVERTEXARRAYSARBPROC)          (GLsizei n, GLuint *arrays);
 129   typedef void        (APIENTRYP PFNGLBINDVERTEXARRAYARBPROC)          (GLuint array);
 130   typedef void        (APIENTRYP PFNGLUNIFORM1IARBPROC)                (GLint location, GLint v0);
 131 #endif
 132
 133 public:
 134   PFNGLSHADERSOURCEARBPROC             vglShaderSourceARB;
 135   PFNGLCREATESHADEROBJECTARBPROC       vglCreateShaderObjectARB;
 136   PFNGLCOMPILESHADERARBPROC            vglCompileShaderARB;
 137   PFNGLCREATEPROGRAMOBJECTARBPROC      vglCreateProgramObjectARB;
 138   PFNGLATTACHOBJECTARBPROC             vglAttachObjectARB;
 139   PFNGLLINKPROGRAMARBPROC              vglLinkProgramARB;
 140   PFNGLUSEPROGRAMOBJECTARBPROC         vglUseProgramObjectARB;
 141
 142   PFNGLGENBUFFERSARBPROC               vglGenBuffersARB;
 143   PFNGLBINDBUFFERARBPROC               vglBindBufferARB;
 144   PFNGLBUFFERDATAARBPROC               vglBufferDataARB;
 145   PFNGLDELETEBUFFERSARBPROC            vglDeleteBuffersARB;
 146   PFNGLGETATTRIBLOCATIONARBPROC        vglGetAttribLocationARB;
 147   PFNGLVERTEXATTRIBPOINTERARBPROC      vglVertexAttribPointerARB;
 148   PFNGLENABLEVERTEXATTRIBARRAYARBPROC  vglEnableVertexAttribArrayARB;
 149   PFNGLDISABLEVERTEXATTRIBARRAYARBPROC vglDisableVertexAttribArrayARB;
 150
 151 #ifdef VTK_OPENGL2
 152   PFNGLDETACHOBJECTARBPROC             vglDetachObjectARB;
 153   PFNGLDELETEOBJECTARBPROC             vglDeleteObjectARB;
 154   PFNGLVALIDATEPROGRAMARBPROC          vglValidateProgramARB;
 155   PFNGLGETSHADERIVARBPROC              vglGetShaderivARB;
 156   PFNGLGETPROGRAMIVARBPROC             vglGetProgramivARB;
 157   PFNGLGETSHADERINFOLOGARBPROC         vglGetShaderInfoLogARB;
 158
 159   PFNGLUNIFORMMATRIX4FVARBPROC         vglUniformMatrix4fvARB;
 160   PFNGLGENVERTEXARRAYSARBPROC          vglGenVertexArraysARB;
 161   PFNGLBINDVERTEXARRAYARBPROC          vglBindVertexArrayARB;
 162   PFNGLUNIFORM1IARBPROC                vglUniform1iARB;
 163   PFNGLGETUNIFORMLOCATIONARBPROC       vglGetUniformLocationARB;
 164 #endif
 165
 166 protected:
 167   bool mIsInitialized;
 168 };
 169
 170 #endif