src/VTKViewer/VTKViewer_OpenGLHelper.h

   1 // Copyright (C) 2007-2024  CEA, EDF, 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 #ifndef GL_COMPILE_STATUS
  74 #define GL_COMPILE_STATUS                 0x8B81
  75 #endif
  76
  77 #ifndef GL_CURRENT_PROGRAM
  78 #define GL_CURRENT_PROGRAM                0x8B8D
  79 #endif
  80
  81 #ifndef GL_DEBUG_TYPE_ERROR
  82 #define GL_DEBUG_TYPE_ERROR               0x824C
  83 #endif
  84
  85 #ifndef GL_LINK_STATUS
  86 #define GL_LINK_STATUS                    0x8B82
  87 #endif
  88
  89 #ifndef GL_TEXTURE0
  90 #define GL_TEXTURE0                       0x84C0
  91 #endif
  92
  93 #ifndef GL_VALIDATE_STATUS
  94 #define GL_VALIDATE_STATUS                0x8B83
  95 #endif
  96
  97 #ifndef GL_NUM_EXTENSIONS
  98 #define GL_NUM_EXTENSIONS                 0x821D
  99 #endif
 100
 101 namespace GUI_OPENGL {
 102 char* readFromFile( std::string fileName );
 103 }
 104
 105 class VTKVIEWER_EXPORT VTKViewer_OpenGLHelper
 106 {
 107 public:
 108   VTKViewer_OpenGLHelper();
 109   ~VTKViewer_OpenGLHelper();
 110
 111   void Init();
 112
 113   bool IsInitialized() const { return mIsInitialized; }
 114
 115 public:
 116   bool CreateShaderProgram (const std::string& theFilePath,
 117                             GLhandleARB&       theProgram,
 118                             GLhandleARB&       theVertexShader,
 119                             GLhandleARB&       theFragmentShader) const;
 120
 121   void DestroyShaderProgram (GLhandleARB theProgram,
 122                              GLhandleARB theVertexShader,
 123                              GLhandleARB theFragmentShader) const;
 124 #ifdef VTK_OPENGL2
 125   void SetUniformMatrix (const GLint         theLocation,
 126                          const vtkMatrix4x4* theMatrix) const;
 127 #endif
 128
 129 protected:
 130   typedef void        (APIENTRYP PFNGLSHADERSOURCEARBPROC)             (GLhandleARB shaderObj, GLsizei count, const GLcharARB* *string, const GLint *length);
 131   typedef GLhandleARB (APIENTRYP PFNGLCREATESHADEROBJECTARBPROC)       (GLenum shaderType);
 132   typedef void        (APIENTRYP PFNGLBINDBUFFERARBPROC)               (GLenum target, GLuint buffer);
 133   typedef void        (APIENTRYP PFNGLDELETEBUFFERSARBPROC)            (GLsizei n, const GLuint *buffers);
 134   typedef void        (APIENTRYP PFNGLGENBUFFERSARBPROC)               (GLsizei n, GLuint *buffers);
 135   typedef void        (APIENTRYP PFNGLBUFFERDATAARBPROC)               (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage);
 136   typedef void        (APIENTRYP PFNGLCOMPILESHADERARBPROC)            (GLhandleARB shaderObj);
 137   typedef GLhandleARB (APIENTRYP PFNGLCREATEPROGRAMOBJECTARBPROC)      (void);
 138   typedef void        (APIENTRYP PFNGLATTACHOBJECTARBPROC)             (GLhandleARB containerObj, GLhandleARB obj);
 139   typedef void        (APIENTRYP PFNGLLINKPROGRAMARBPROC)              (GLhandleARB programObj);
 140   typedef void        (APIENTRYP PFNGLUSEPROGRAMOBJECTARBPROC)         (GLhandleARB programObj);
 141   typedef GLint       (APIENTRYP PFNGLGETATTRIBLOCATIONARBPROC)        (GLhandleARB programObj, const GLcharARB *name);
 142   typedef void        (APIENTRYP PFNGLVERTEXATTRIBPOINTERARBPROC)      (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
 143   typedef void        (APIENTRYP PFNGLENABLEVERTEXATTRIBARRAYARBPROC)  (GLuint index);
 144   typedef void        (APIENTRYP PFNGLDISABLEVERTEXATTRIBARRAYARBPROC) (GLuint index);
 145
 146 #ifdef VTK_OPENGL2
 147   typedef void        (APIENTRYP PFNGLACTIVETEXTUREARBPROC)            (GLenum texture);
 148   typedef void        (APIENTRYP PFNGLDETACHOBJECTARBPROC)             (GLhandleARB containerObj, GLhandleARB obj);
 149   typedef void        (APIENTRYP PFNGLDELETEOBJECTARBPROC)             (GLhandleARB obj);
 150   typedef void        (APIENTRYP PFNGLVALIDATEPROGRAMARBPROC)          (GLhandleARB program);
 151   typedef GLint       (APIENTRYP PFNGLGETUNIFORMLOCATIONARBPROC)       (GLhandleARB program, const GLcharARB *name );
 152   typedef void        (APIENTRYP PFNGLGETSHADERIVARBPROC)              (GLuint shader, GLenum pname, GLint *params);
 153   typedef void        (APIENTRYP PFNGLGETPROGRAMIVARBPROC)             (GLenum target, GLenum pname, GLint *params);
 154   typedef void        (APIENTRYP PFNGLGETSHADERINFOLOGARBPROC)         (GLuint shader, GLsizei maxLength, GLsizei *length, GLcharARB *infoLog);
 155   typedef void        (APIENTRYP PFNGLUNIFORMMATRIX4FVARBPROC)         (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
 156   typedef void        (APIENTRYP PFNGLGENVERTEXARRAYSARBPROC)          (GLsizei n, GLuint *arrays);
 157   typedef void        (APIENTRYP PFNGLBINDVERTEXARRAYARBPROC)          (GLuint array);
 158   typedef void        (APIENTRYP PFNGLUNIFORM1IARBPROC)                (GLint location, GLint v0);
 159   typedef const GLubyte *(APIENTRYP PFNGLGETSTRINGIPROC)               (GLenum name, GLuint index);
 160 #endif
 161
 162 public:
 163   PFNGLSHADERSOURCEARBPROC             vglShaderSourceARB;
 164   PFNGLCREATESHADEROBJECTARBPROC       vglCreateShaderObjectARB;
 165   PFNGLCOMPILESHADERARBPROC            vglCompileShaderARB;
 166   PFNGLCREATEPROGRAMOBJECTARBPROC      vglCreateProgramObjectARB;
 167   PFNGLATTACHOBJECTARBPROC             vglAttachObjectARB;
 168   PFNGLLINKPROGRAMARBPROC              vglLinkProgramARB;
 169   PFNGLUSEPROGRAMOBJECTARBPROC         vglUseProgramObjectARB;
 170
 171   PFNGLGENBUFFERSARBPROC               vglGenBuffersARB;
 172   PFNGLBINDBUFFERARBPROC               vglBindBufferARB;
 173   PFNGLBUFFERDATAARBPROC               vglBufferDataARB;
 174   PFNGLDELETEBUFFERSARBPROC            vglDeleteBuffersARB;
 175   PFNGLGETATTRIBLOCATIONARBPROC        vglGetAttribLocationARB;
 176   PFNGLVERTEXATTRIBPOINTERARBPROC      vglVertexAttribPointerARB;
 177   PFNGLENABLEVERTEXATTRIBARRAYARBPROC  vglEnableVertexAttribArrayARB;
 178   PFNGLDISABLEVERTEXATTRIBARRAYARBPROC vglDisableVertexAttribArrayARB;
 179
 180 #ifdef VTK_OPENGL2
 181   PFNGLDETACHOBJECTARBPROC             vglDetachObjectARB;
 182   PFNGLDELETEOBJECTARBPROC             vglDeleteObjectARB;
 183   PFNGLVALIDATEPROGRAMARBPROC          vglValidateProgramARB;
 184   PFNGLGETSHADERIVARBPROC              vglGetShaderivARB;
 185   PFNGLGETPROGRAMIVARBPROC             vglGetProgramivARB;
 186   PFNGLGETSHADERINFOLOGARBPROC         vglGetShaderInfoLogARB;
 187
 188   PFNGLUNIFORMMATRIX4FVARBPROC         vglUniformMatrix4fvARB;
 189   PFNGLGENVERTEXARRAYSARBPROC          vglGenVertexArraysARB;
 190   PFNGLBINDVERTEXARRAYARBPROC          vglBindVertexArrayARB;
 191   PFNGLUNIFORM1IARBPROC                vglUniform1iARB;
 192   PFNGLGETUNIFORMLOCATIONARBPROC       vglGetUniformLocationARB;
 193   PFNGLACTIVETEXTUREARBPROC            vglActiveTextureARB;
 194   PFNGLGETSTRINGIPROC                  vglGetStringiARB;
 195 #endif
 196
 197 protected:
 198   bool mIsInitialized;
 199 };
 200
 201 #endif