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Support for OpenGL buffer objects on Windows

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This commit is contained in:
Matthias 2016-12-02 12:27:26 +01:00
parent e31cc7dfa1
commit 953bd13cf4
4 changed files with 40 additions and 10 deletions
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26
libsrc/include/incopengl.hpp
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@ -1,5 +1,8 @@
#ifndef INCOPENGL_HPP___
#define INCOPENGL_HPP___
#define GL_GLEXT_PROTOTYPES
#include <mydefs.hpp>
# if defined(TOGL_AGL) || defined(TOGL_AGL_CLASSIC) || defined(TOGL_NSOPENGL)
# include <OpenGL/gl.h>
@ -17,15 +20,20 @@
#include <GL/glxext.h>
#endif
#ifdef WIN32
// part of OpenGL 1.2, but not in Microsoft's OpenGL 1.1 header:
// GL version sould be checked at runtime
#ifndef GL_CLAMP_TO_EDGE
#define GL_CLAMP_TO_EDGE 0x812F
#define GL_CLAMP_TO_EDGE 0x812F
#define GL_ARRAY_BUFFER 0x8892
#define GL_ELEMENT_ARRAY_BUFFER 0x8893
#define GL_STATIC_DRAW 0x88E4
typedef ptrdiff_t GLintptr;
typedef ptrdiff_t GLsizeiptr;
extern void (*glBindBuffer) (GLenum a, GLuint b);
extern void (*glDeleteBuffers) (GLsizei a, const GLuint *b);
extern void (*glGenBuffers) (GLsizei a, GLuint *b);
extern void (*glBufferData) (GLenum a, GLsizeiptr b, const GLvoid *c, GLenum d);
extern void (*glBufferSubData) (GLenum a, GLintptr b, GLsizeiptr c, const GLvoid *d);
#endif
DLL_HEADER void LoadOpenGLFunctionPointers();
#endif // INCOPENGL_HPP___

19
libsrc/visualization/vssolution.cpp
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@ -4805,3 +4805,22 @@ void Ng_Redraw (bool blocking)
#endif
}
#ifdef OPENGL
#ifdef WIN32
void (*glBindBuffer) (GLenum a, GLuint b);
void (*glDeleteBuffers) (GLsizei a, const GLuint *b);
void (*glGenBuffers) (GLsizei a, GLuint *b);
void (*glBufferData) (GLenum a, GLsizeiptr b, const GLvoid *c, GLenum d);
void (*glBufferSubData) (GLenum a, GLintptr b, GLsizeiptr c, const GLvoid *d);
DLL_HEADER void LoadOpenGLFunctionPointers() {
glBindBuffer = (decltype(glBindBuffer)) wglGetProcAddress("glBindBuffer");
glBufferSubData = (decltype(glBufferSubData)) wglGetProcAddress("glBufferSubData");
glBufferData = (decltype(glBufferData)) wglGetProcAddress("glBufferData");
glDeleteBuffers = (decltype(glDeleteBuffers)) wglGetProcAddress("glDeleteBuffers");
glGenBuffers = (decltype(glGenBuffers)) wglGetProcAddress("glGenBuffers");
if(!glBindBuffer) throw std::runtime_error("Could not load OpenGL functions!");
}
#else // WIN32
DLL_HEADER void LoadOpenGLFunctionPointers() { }
#endif // WIN32
#endif // OPENGL

2
libsrc/visualization/vssolution.hpp
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@ -43,7 +43,7 @@ class DLL_HEADER VisualSceneSolution : public VisualScene
Point<3> p;
};
// #define USE_BUFFERS
#define USE_BUFFERS
#ifdef USE_BUFFERS
bool has_surfel_vbo = false;
GLuint surfel_vbo[4]; //

3
ng/ngpkg.cpp
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@ -1938,6 +1938,7 @@ namespace netgen
if (nodisplay)
return;
LoadOpenGLFunctionPointers();
fontbase = Togl_LoadBitmapFont( togl, TOGL_BITMAP_8_BY_13 );
Set_OpenGLText_Callback (&MyOpenGLText_GUI);
@ -2078,6 +2079,8 @@ namespace netgen
// possible values: 12,14,16,18,20,22,24,28,32
font = selectFont(18);
LoadOpenGLFunctionPointers();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);