diff options
Diffstat (limited to 'auto/src/glew_head.c')
| -rw-r--r-- | auto/src/glew_head.c | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/auto/src/glew_head.c b/auto/src/glew_head.c new file mode 100644 index 0000000..e945bcd --- /dev/null +++ b/auto/src/glew_head.c @@ -0,0 +1,285 @@ +#include <GL/glew.h> + +#if defined(_WIN32) +# include <GL/wglew.h> +#elif !defined(__ANDROID__) && !defined(__native_client__) && !defined(__HAIKU__) && (!defined(__APPLE__) || defined(GLEW_APPLE_GLX)) +# include <GL/glxew.h> +#endif + +#include <stddef.h> /* For size_t */ + +/* + * Define glewGetContext and related helper macros. + */ +#ifdef GLEW_MX +# define glewGetContext() ctx +# ifdef _WIN32 +# define GLEW_CONTEXT_ARG_DEF_INIT GLEWContext* ctx +# define GLEW_CONTEXT_ARG_VAR_INIT ctx +# define wglewGetContext() ctx +# define WGLEW_CONTEXT_ARG_DEF_INIT WGLEWContext* ctx +# define WGLEW_CONTEXT_ARG_DEF_LIST WGLEWContext* ctx +# else /* _WIN32 */ +# define GLEW_CONTEXT_ARG_DEF_INIT void +# define GLEW_CONTEXT_ARG_VAR_INIT +# define glxewGetContext() ctx +# define GLXEW_CONTEXT_ARG_DEF_INIT void +# define GLXEW_CONTEXT_ARG_DEF_LIST GLXEWContext* ctx +# endif /* _WIN32 */ +# define GLEW_CONTEXT_ARG_DEF_LIST GLEWContext* ctx +#else /* GLEW_MX */ +# define GLEW_CONTEXT_ARG_DEF_INIT void +# define GLEW_CONTEXT_ARG_VAR_INIT +# define GLEW_CONTEXT_ARG_DEF_LIST void +# define WGLEW_CONTEXT_ARG_DEF_INIT void +# define WGLEW_CONTEXT_ARG_DEF_LIST void +# define GLXEW_CONTEXT_ARG_DEF_INIT void +# define GLXEW_CONTEXT_ARG_DEF_LIST void +#endif /* GLEW_MX */ + +#if defined(GLEW_REGAL) + +/* In GLEW_REGAL mode we call direcly into the linked + libRegal.so glGetProcAddressREGAL for looking up + the GL function pointers. */ + +# undef glGetProcAddressREGAL +# ifdef WIN32 +extern void * __stdcall glGetProcAddressREGAL(const GLchar *name); +static void * (__stdcall * regalGetProcAddress) (const GLchar *) = glGetProcAddressREGAL; +# else +extern void * glGetProcAddressREGAL(const GLchar *name); +static void * (*regalGetProcAddress) (const GLchar *) = glGetProcAddressREGAL; +# endif +# define glGetProcAddressREGAL GLEW_GET_FUN(__glewGetProcAddressREGAL) + +#elif defined(__sgi) || defined (__sun) || defined(__HAIKU__) || defined(GLEW_APPLE_GLX) +#include <dlfcn.h> +#include <stdio.h> +#include <stdlib.h> + +void* dlGetProcAddress (const GLubyte* name) +{ + static void* h = NULL; + static void* gpa; + + if (h == NULL) + { + if ((h = dlopen(NULL, RTLD_LAZY | RTLD_LOCAL)) == NULL) return NULL; + gpa = dlsym(h, "glXGetProcAddress"); + } + + if (gpa != NULL) + return ((void*(*)(const GLubyte*))gpa)(name); + else + return dlsym(h, (const char*)name); +} +#endif /* __sgi || __sun || GLEW_APPLE_GLX */ + +#if defined(__APPLE__) +#include <stdlib.h> +#include <string.h> +#include <AvailabilityMacros.h> + +#ifdef MAC_OS_X_VERSION_10_3 + +#include <dlfcn.h> + +void* NSGLGetProcAddress (const GLubyte *name) +{ + static void* image = NULL; + void* addr; + if (NULL == image) + { + image = dlopen("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL", RTLD_LAZY); + } + if( !image ) return NULL; + addr = dlsym(image, (const char*)name); + if( addr ) return addr; +#ifdef GLEW_APPLE_GLX + return dlGetProcAddress( name ); // try next for glx symbols +#else + return NULL; +#endif +} +#else + +#include <mach-o/dyld.h> + +void* NSGLGetProcAddress (const GLubyte *name) +{ + static const struct mach_header* image = NULL; + NSSymbol symbol; + char* symbolName; + if (NULL == image) + { + image = NSAddImage("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL", NSADDIMAGE_OPTION_RETURN_ON_ERROR); + } + /* prepend a '_' for the Unix C symbol mangling convention */ + symbolName = malloc(strlen((const char*)name) + 2); + strcpy(symbolName+1, (const char*)name); + symbolName[0] = '_'; + symbol = NULL; + /* if (NSIsSymbolNameDefined(symbolName)) + symbol = NSLookupAndBindSymbol(symbolName); */ + symbol = image ? NSLookupSymbolInImage(image, symbolName, NSLOOKUPSYMBOLINIMAGE_OPTION_BIND | NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR) : NULL; + free(symbolName); + if( symbol ) return NSAddressOfSymbol(symbol); +#ifdef GLEW_APPLE_GLX + return dlGetProcAddress( name ); // try next for glx symbols +#else + return NULL; +#endif +} +#endif /* MAC_OS_X_VERSION_10_3 */ +#endif /* __APPLE__ */ + +/* + * Define glewGetProcAddress. + */ +#if defined(GLEW_REGAL) +# define glewGetProcAddress(name) regalGetProcAddress((const GLchar *) name) +#elif defined(_WIN32) +# define glewGetProcAddress(name) wglGetProcAddress((LPCSTR)name) +#elif defined(__APPLE__) && !defined(GLEW_APPLE_GLX) +# define glewGetProcAddress(name) NSGLGetProcAddress(name) +#elif defined(__sgi) || defined(__sun) || defined(__HAIKU__) +# define glewGetProcAddress(name) dlGetProcAddress(name) +#elif defined(__ANDROID__) +# define glewGetProcAddress(name) NULL /* TODO */ +#elif defined(__native_client__) +# define glewGetProcAddress(name) NULL /* TODO */ +#else /* __linux */ +# define glewGetProcAddress(name) (*glXGetProcAddressARB)(name) +#endif + +/* + * Redefine GLEW_GET_VAR etc without const cast + */ + +#undef GLEW_GET_VAR +#ifdef GLEW_MX +# define GLEW_GET_VAR(x) (glewGetContext()->x) +#else /* GLEW_MX */ +# define GLEW_GET_VAR(x) (x) +#endif /* GLEW_MX */ + +#ifdef WGLEW_GET_VAR +# undef WGLEW_GET_VAR +# ifdef GLEW_MX +# define WGLEW_GET_VAR(x) (wglewGetContext()->x) +# else /* GLEW_MX */ +# define WGLEW_GET_VAR(x) (x) +# endif /* GLEW_MX */ +#endif /* WGLEW_GET_VAR */ + +#ifdef GLXEW_GET_VAR +# undef GLXEW_GET_VAR +# ifdef GLEW_MX +# define GLXEW_GET_VAR(x) (glxewGetContext()->x) +# else /* GLEW_MX */ +# define GLXEW_GET_VAR(x) (x) +# endif /* GLEW_MX */ +#endif /* GLXEW_GET_VAR */ + +/* + * GLEW, just like OpenGL or GLU, does not rely on the standard C library. + * These functions implement the functionality required in this file. + */ +static GLuint _glewStrLen (const GLubyte* s) +{ + GLuint i=0; + if (s == NULL) return 0; + while (s[i] != '\0') i++; + return i; +} + +static GLuint _glewStrCLen (const GLubyte* s, GLubyte c) +{ + GLuint i=0; + if (s == NULL) return 0; + while (s[i] != '\0' && s[i] != c) i++; + return (s[i] == '\0' || s[i] == c) ? i : 0; +} + +static GLboolean _glewStrSame (const GLubyte* a, const GLubyte* b, GLuint n) +{ + GLuint i=0; + if(a == NULL || b == NULL) + return (a == NULL && b == NULL && n == 0) ? GL_TRUE : GL_FALSE; + while (i < n && a[i] != '\0' && b[i] != '\0' && a[i] == b[i]) i++; + return i == n ? GL_TRUE : GL_FALSE; +} + +static GLboolean _glewStrSame1 (const GLubyte** a, GLuint* na, const GLubyte* b, GLuint nb) +{ + while (*na > 0 && (**a == ' ' || **a == '\n' || **a == '\r' || **a == '\t')) + { + (*a)++; + (*na)--; + } + if(*na >= nb) + { + GLuint i=0; + while (i < nb && (*a)+i != NULL && b+i != NULL && (*a)[i] == b[i]) i++; + if(i == nb) + { + *a = *a + nb; + *na = *na - nb; + return GL_TRUE; + } + } + return GL_FALSE; +} + +static GLboolean _glewStrSame2 (const GLubyte** a, GLuint* na, const GLubyte* b, GLuint nb) +{ + if(*na >= nb) + { + GLuint i=0; + while (i < nb && (*a)+i != NULL && b+i != NULL && (*a)[i] == b[i]) i++; + if(i == nb) + { + *a = *a + nb; + *na = *na - nb; + return GL_TRUE; + } + } + return GL_FALSE; +} + +static GLboolean _glewStrSame3 (const GLubyte** a, GLuint* na, const GLubyte* b, GLuint nb) +{ + if(*na >= nb) + { + GLuint i=0; + while (i < nb && (*a)+i != NULL && b+i != NULL && (*a)[i] == b[i]) i++; + if (i == nb && (*na == nb || (*a)[i] == ' ' || (*a)[i] == '\n' || (*a)[i] == '\r' || (*a)[i] == '\t')) + { + *a = *a + nb; + *na = *na - nb; + return GL_TRUE; + } + } + return GL_FALSE; +} + +/* + * Search for name in the extensions string. Use of strstr() + * is not sufficient because extension names can be prefixes of + * other extension names. Could use strtok() but the constant + * string returned by glGetString might be in read-only memory. + */ +static GLboolean _glewSearchExtension (const char* name, const GLubyte *start, const GLubyte *end) +{ + const GLubyte* p; + GLuint len = _glewStrLen((const GLubyte*)name); + p = start; + while (p < end) + { + GLuint n = _glewStrCLen(p, ' '); + if (len == n && _glewStrSame((const GLubyte*)name, p, n)) return GL_TRUE; + p += n+1; + } + return GL_FALSE; +} |