在Borland C ++ Builder 6中使用帧缓冲区对象（FBO） [英] Using Frame Buffer Objects (FBO) in Borland C++ Builder 6

问题描述

我在帧缓冲区对象（FBO）的命令glGenFramebuffersEXT上遇到访问冲突：

I have an "access violation" on the Frame Buffer Object (FBO)'s command glGenFramebuffersEXT :

    void TGLForm::DrawScene()
    {
    wglMakeCurrent(ghDC, ghRC);

    glEnable(GL_TEXTURE_2D);

    GLuint framebuffer, texturefbo;
    GLenum status;

    glGenFramebuffersEXT(1, &framebuffer);  // access violation here

建立了一个有关FBO的帮助线程，我检查了glext.h的初始化没问题，并且可以在预处理器行中以这种方式重复：

Founding a help thread concerning the FBOs, I checked that the glext.h initialization were okay and repeated amidst the preprocessor lines this way :

    #include "glext.h"
    #include "wglext.h"

    extern PFNGLGENFRAMEBUFFERSEXTPROC glGenFramebuffersEXT = (PFNGLGENFRAMEBUFFERSEXTPROC)wglGetProcAddress("glGenFramebuffersEXT");
    extern PFNGLBINDFRAMEBUFFEREXTPROC glBindFramebufferEXT = (PFNGLBINDFRAMEBUFFEREXTPROC)wglGetProcAddress("glBindFramebufferEXT");
    extern PFNGLFRAMEBUFFERTEXTURE2DEXTPROC glFramebufferTexture2DEXT = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC)wglGetProcAddress("glFramebufferTexture2DEXT");
    extern PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC glCheckFramebufferStatusEXT = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC)wglGetProcAddress("glCheckFramebufferStatusEXT");
    extern PFNGLGENRENDERBUFFERSEXTPROC glGenRenderbuffersEXT = (PFNGLGENRENDERBUFFERSEXTPROC)wglGetProcAddress("glGenRenderbuffersEXT");
    extern PFNGLBINDRENDERBUFFEREXTPROC glBindRenderbufferEXT = (PFNGLBINDRENDERBUFFEREXTPROC)wglGetProcAddress("glBindRenderbufferEXT");
    extern PFNGLRENDERBUFFERSTORAGEEXTPROC glRenderbufferStorageEXT = (PFNGLRENDERBUFFERSTORAGEEXTPROC)wglGetProcAddress("glRenderbufferStorageEXT");
    extern PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC glFramebufferRenderbufferEXT = (PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC)wglGetProcAddress("glFramebufferRenderbufferEXT");

=>仍然存在访问冲突。

=> The access violation remains.

另一个帮助线程促使我下载NVIDIA OpenGL SDK，因为我有一张GT9800 Nvidia卡：它没有消除访问冲突。

Another help thread induced me to download the NVIDIA OpenGL SDK's because I have a GT9800 Nvidia card : it didn't remove the "access violation".

我尝试使用GLee和Borland Builder 6中的Glew：

I tried using GLee and Glew in Borland Builder 6 :

• 要在Borland中包括Glew，首先需要将Visual Studio coff lib转换为coff到borland生成器 omf库，

• to include Glew in Borland it is first needed to convert Visual Studio "coff" lib from coff to borland builder "omf" lib,

，但是使用borland命令脚本 coff2omf.exe，我得到此错误标签：无效的计算机类型-并使用 objconv.exe出现此错误：导入库无法转换为静态库。

but with the borland command script "coff2omf.exe" I get this error label : "invalid machine type" - and with "objconv.exe" I get this error : "import library cannot convert to static library".

= >有人知道我如何成功将Glew coff lib转换为Borland Builder格式 omf吗？

=> does someone know how I may manage to convert the Glew "coff" lib to the Borland Builder format "omf" successfully ?

=>我们如何转换导入库到静态库？

=> how can we convert an "import library" to a "static library" ?

推荐答案

1. 下载并使用GLEW .h，。 c源代码

#define GLEW_STATIC
#include "gl\glew.c"  // ~900KB file !!!

• 我在borland源中使用了很多年，没有任何问题


• 如果包含路径有问题，则只需使用相对路径



不要忘记先初始化错误

glewInit();







• 当然，您的OpenGL必须在此之前初始化！ / li>
  
  • of course your OpenGL must be initialized prior to this !!!

  检查是否有FBO支持

  if (glGenFramebuffersEXT==NULL) error ...
  

  
  

  • FBO使用率

  • FBO usage

    
    
    • 如果一切正常
    
    
    • 那么您仍然会遇到访问冲突！！！
    
    
    • 如果FBO使用不当...
    
    
    • 但这还不是您的情况...
    
    
    • if all is OK
    • then you still can have access violations !!!
    • if FBO not used properly ...
    • but this is not your case yet ...

    这篇关于在Borland C ++ Builder 6中使用帧缓冲区对象（FBO）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！