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 Posted: Fri Feb 27, 2004 10:52 pm Post subject: function prototype |
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When I use 1st line in prototypes, compiler fails because SDL_GL_GetProcAddress return (void*)
When I use 2nd line in prototypes, compiler fails in last line because (void*) is not a function prototype.
So, what cast I must use?
Can you rewrite these 3 lines correctly?
With 1st line in prototypes, I used:
glCompressedTexImage2DARB =
(void (*glCompressedTexImage2DARB)
(GLenum, GLint, GLenum, GLsizei, GLsizei, GLint, GLsizei, const void*))
SDL_GL_GetProcAddress("glCompressedTexImage2DARB");
but it does not work
-------------------------------------------------------------------------
//prototypes
void (*glCompressedTexImage2DARB) (GLenum, GLint, GLenum, GLsizei, GLsizei, GLint, GLsizei, const void*);
//void *glCompressedTexImage2DARB;
//load function
glCompressedTexImage2DARB = SDL_GL_GetProcAddress("glCompressedTexImage2DARB");
//use function
glCompressedTexImage2DARB(GL_TEXTURE_2D, z, dxt_f, width, height, 0, size, (byte*) tex + offset);
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red floyd
Guest
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| Posted: Fri Feb 27, 2004 11:05 pm Post subject: Re: function prototype |
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<- Chameleon -> wrote:
| Quote: | When I use 1st line in prototypes, compiler fails because SDL_GL_GetProcAddress return (void*)
When I use 2nd line in prototypes, compiler fails in last line because (void*) is not a function prototype.
So, what cast I must use?
Can you rewrite these 3 lines correctly?
With 1st line in prototypes, I used:
glCompressedTexImage2DARB =
(void (*glCompressedTexImage2DARB)
(GLenum, GLint, GLenum, GLsizei, GLsizei, GLint, GLsizei, const void*))
SDL_GL_GetProcAddress("glCompressedTexImage2DARB");
but it does not work
-------------------------------------------------------------------------
//prototypes
void (*glCompressedTexImage2DARB) (GLenum, GLint, GLenum, GLsizei, GLsizei, GLint, GLsizei, const void*);
//void *glCompressedTexImage2DARB;
//load function
glCompressedTexImage2DARB = SDL_GL_GetProcAddress("glCompressedTexImage2DARB");
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glCompressedTexImage2DARB = reinterpret_cast<void (*)(GLenum ,GLint,
GLenum, Glsizei, const void
*)>(SDL_GL_GetProcAddress("glCompressedTexImage2DARB"));
| Quote: | //use function
glCompressedTexImage2DARB(GL_TEXTURE_2D, z, dxt_f, width, height, 0, size, (byte*) tex + offset);
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