学习OpenGL的基础环境_LearnOpenGL.zip

/* OpenGL loader generated by glad 0.1.27 on Mon Aug 27 05:07:20 2018. Language/Generator: C/C++ Specification: gl APIs: gl=3.3 Profile: compatibility Extensions: Loader: True Local files: False Omit khrplatform: False Commandline: --profile="compatibility" --api="gl=3.3" --generator="c" --spec="gl" --extensions="" Online: http://glad.dav1d.de/#profile=compatibility&language=c&specification=gl&loader=on&api=gl%3D3.3 */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <glad/glad.h> static void* get_proc(const char *namez); #if defined(_WIN32) || defined(__CYGWIN__) #include <windows.h> static HMODULE libGL; typedef void* (APIENTRYP PFNWGLGETPROCADDRESSPROC_PRIVATE)(const char*); static PFNWGLGETPROCADDRESSPROC_PRIVATE gladGetProcAddressPtr; #ifdef _MSC_VER #ifdef __has_include #if __has_include(<winapifamily.h>) #define HAVE_WINAPIFAMILY 1 #endif #elif _MSC_VER >= 1700 && !_USING_V110_SDK71_ #define HAVE_WINAPIFAMILY 1 #endif #endif #ifdef HAVE_WINAPIFAMILY #include <winapifamily.h> #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) #define IS_UWP 1 #endif #endif static int open_gl(void) { #ifndef IS_UWP libGL = LoadLibraryW(L"opengl32.dll"); if(libGL != NULL) { void (* tmp)(void); tmp = (void(*)(void)) GetProcAddress(libGL, "wglGetProcAddress"); gladGetProcAddressPtr = (PFNWGLGETPROCADDRESSPROC_PRIVATE) tmp; return gladGetProcAddressPtr != NULL; } #endif return 0; } static void close_gl(void) { if(libGL != NULL) { FreeLibrary((HMODULE) libGL); libGL = NULL; } } #else #include <dlfcn.h> static void* libGL; #if !defined(__APPLE__) && !defined(__HAIKU__) typedef void* (APIENTRYP PFNGLXGETPROCADDRESSPROC_PRIVATE)(const char*); static PFNGLXGETPROCADDRESSPROC_PRIVATE gladGetProcAddressPtr; #endif static int open_gl(void) { #ifdef __APPLE__ static const char *NAMES[] = { "../Frameworks/OpenGL.framework/OpenGL", "/Library/Frameworks/OpenGL.framework/OpenGL", "/System/Library/Frameworks/OpenGL.framework/OpenGL", "/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL" }; #else static const char *NAMES[] = {"libGL.so.1", "libGL.so"}; #endif unsigned int index = 0; for(index = 0; index < (sizeof(NAMES) / sizeof(NAMES[0])); index++) { libGL = dlopen(NAMES[index], RTLD_NOW | RTLD_GLOBAL); if(libGL != NULL) { #if defined(__APPLE__) || defined(__HAIKU__) return 1; #else gladGetProcAddressPtr = (PFNGLXGETPROCADDRESSPROC_PRIVATE)dlsym(libGL, "glXGetProcAddressARB"); return gladGetProcAddressPtr != NULL; #endif } } return 0; } static void close_gl(void) { if(libGL != NULL) { dlclose(libGL); libGL = NULL; } } #endif static void* get_proc(const char *namez) { void* result = NULL; if(libGL == NULL) return NULL; #if !defined(__APPLE__) && !defined(__HAIKU__) if(gladGetProcAddressPtr != NULL) { result = gladGetProcAddressPtr(namez); } #endif if(result == NULL) { #if defined(_WIN32) || defined(__CYGWIN__) result = (void*)GetProcAddress((HMODULE) libGL, namez); #else result = dlsym(libGL, namez); #endif } return result; } int gladLoadGL(void) { int status = 0; if(open_gl()) { status = gladLoadGLLoader(&get_proc); close_gl(); } return status; } struct gladGLversionStruct GLVersion = { 0, 0 }; #if defined(GL_ES_VERSION_3_0) || defined(GL_VERSION_3_0) #define _GLAD_IS_SOME_NEW_VERSION 1 #endif static int max_loaded_major; static int max_loaded_minor; static const char *exts = NULL; static int num_exts_i = 0; static char **exts_i = NULL; static int get_exts(void) { #ifdef _GLAD_IS_SOME_NEW_VERSION if(max_loaded_major < 3) { #endif exts = (const char *)glGetString(GL_EXTENSIONS); #ifdef _GLAD_IS_SOME_NEW_VERSION } else { unsigned int index; num_exts_i = 0; glGetIntegerv(GL_NUM_EXTENSIONS, &num_exts_i); if (num_exts_i > 0) { exts_i = (char **)realloc((void *)exts_i, (size_t)num_exts_i * (sizeof *exts_i)); } if (exts_i == NULL) { return 0; } for(index = 0; index < (unsigned)num_exts_i; index++) { const char *gl_str_tmp = (const char*)glGetStringi(GL_EXTENSIONS, index); size_t len = strlen(gl_str_tmp); char *local_str = (char*)malloc((len+1) * sizeof(char)); if(local_str != NULL) { memcpy(local_str, gl_str_tmp, (len+1) * sizeof(char)); } exts_i[index] = local_str; } } #endif return 1; } static void free_exts(void) { if (exts_i != NULL) { int index; for(index = 0; index < num_exts_i; index++) { free((char *)exts_i[index]); } free((void *)exts_i); exts_i = NULL; } } static int has_ext(const char *ext) { #ifdef _GLAD_IS_SOME_NEW_VERSION if(max_loaded_major < 3) { #endif const char *extensions; const char *loc; const char *terminator; extensions = exts; if(extensions == NULL || ext == NULL) { return 0; } while(1) { loc = strstr(extensions, ext); if(loc == NULL) { return 0; } terminator = loc + strlen(ext); if((loc == extensions || *(loc - 1) == ' ') && (*terminator == ' ' || *terminator == '\0')) { return 1; } extensions = terminator; } #ifdef _GLAD_IS_SOME_NEW_VERSION } else { int index; if(exts_i == NULL) return 0; for(index = 0; index < num_exts_i; index++) { const char *e = exts_i[index]; if(exts_i[index] != NULL && strcmp(e, ext) == 0) { return 1; } } } #endif return 0; } int GLAD_GL_VERSION_1_0 = 0; int GLAD_GL_VERSION_1_1 = 0; int GLAD_GL_VERSION_1_2 = 0; int GLAD_GL_VERSION_1_3 = 0; int GLAD_GL_VERSION_1_4 = 0; int GLAD_GL_VERSION_1_5 = 0; int GLAD_GL_VERSION_2_0 = 0; int GLAD_GL_VERSION_2_1 = 0; int GLAD_GL_VERSION_3_0 = 0; int GLAD_GL_VERSION_3_1 = 0; int GLAD_GL_VERSION_3_2 = 0; int GLAD_GL_VERSION_3_3 = 0; PFNGLACCUMPROC glad_glAccum = NULL; PFNGLACTIVETEXTUREPROC glad_glActiveTexture = NULL; PFNGLALPHAFUNCPROC glad_glAlphaFunc = NULL; PFNGLARETEXTURESRESIDENTPROC glad_glAreTexturesResident = NULL; PFNGLARRAYELEMENTPROC glad_glArrayElement = NULL; PFNGLATTACHSHADERPROC glad_glAttachShader = NULL; PFNGLBEGINPROC glad_glBegin = NULL; PFNGLBEGINCONDITIONALRENDERPROC glad_glBeginConditionalRender = NULL; PFNGLBEGINQUERYPROC glad_glBeginQuery = NULL; PFNGLBEGINTRANSFORMFEEDBACKPROC glad_glBeginTransformFeedback = NULL; PFNGLBINDATTRIBLOCATIONPROC glad_glBindAttribLocation = NULL; PFNGLBINDBUFFERPROC glad_glBindBuffer = NULL; PFNGLBINDBUFFERBASEPROC glad_glBindBufferBase = NULL; PFNGLBINDBUFFERRANGEPROC glad_glBindBufferRange = NULL; PFNGLBINDFRAGDATALOCATIONPROC glad_glBindFragDataLocation = NULL; PFNGLBINDFRAGDATALOCATIONINDEXEDPROC glad_glBindFragDataLocationIndexed = NULL; PFNGLBINDFRAMEBUFFERPROC glad_glBindFramebuffer = NULL; PFNGLBINDRENDERBUFFERPROC glad_glBindRenderbuffer = NULL; PFNGLBINDSAMPLERPROC glad_glBindSampler = NULL; PFNGLBINDTEXTUREPROC glad_glBindTexture = NULL; PFNGLBINDVERTEXARRAYPROC glad_glBindVertexArray = NULL; PFNGLBITMAPPROC glad_glBitmap = NULL; PFNGLBLENDCOLORPROC glad_glBlendColor = NULL; PFNGLBLENDEQUATIONPROC glad_glBlendEquation = NULL; PFNGLBLENDEQUATIONSEPARATEPROC glad_glBlendEquationSeparate = NULL; PFNGLBLENDFUNCPROC glad_glBlendFunc = NULL; PFNGLBLENDFUNCSEPARATEPROC glad_glBlendFuncSeparate = NULL; PFNGLBLITFRAMEBUFFERPROC glad_glBlitFramebuffer = NULL;