323 lines
15 KiB
C
323 lines
15 KiB
C
/*
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* GLAD OpenGL 3.3 Core Profile Loader Implementation
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*/
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#include <glad/gl.h>
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#include <string.h>
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#ifdef _WIN32
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#include <windows.h>
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static HMODULE libGL;
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static int open_gl(void) {
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libGL = LoadLibraryW(L"opengl32.dll");
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return libGL != NULL;
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}
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static void close_gl(void) {
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if (libGL != NULL) {
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FreeLibrary(libGL);
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libGL = NULL;
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}
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}
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static GLADapiproc get_proc(const char *name) {
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GLADapiproc result = NULL;
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/* Try wglGetProcAddress first for extension functions */
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typedef GLADapiproc (KHRONOS_APIENTRY *PFNWGLGETPROCADDRESSPROC)(const char*);
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static PFNWGLGETPROCADDRESSPROC wglGetProcAddress_ptr = NULL;
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if (wglGetProcAddress_ptr == NULL && libGL != NULL) {
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wglGetProcAddress_ptr = (PFNWGLGETPROCADDRESSPROC)GetProcAddress(libGL, "wglGetProcAddress");
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}
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if (wglGetProcAddress_ptr != NULL) {
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result = wglGetProcAddress_ptr(name);
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}
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/* Fall back to GetProcAddress for core functions */
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if (result == NULL && libGL != NULL) {
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result = (GLADapiproc)GetProcAddress(libGL, name);
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}
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return result;
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}
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#elif defined(__APPLE__)
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#include <dlfcn.h>
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static void* libGL;
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static int open_gl(void) {
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libGL = dlopen("/System/Library/Frameworks/OpenGL.framework/OpenGL", RTLD_LAZY | RTLD_LOCAL);
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return libGL != NULL;
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}
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static void close_gl(void) {
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if (libGL != NULL) {
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dlclose(libGL);
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libGL = NULL;
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}
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}
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static GLADapiproc get_proc(const char *name) {
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if (libGL == NULL) return NULL;
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return (GLADapiproc)dlsym(libGL, name);
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}
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#else /* Linux/Unix */
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#include <dlfcn.h>
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static void* libGL;
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static int open_gl(void) {
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libGL = dlopen("libGL.so.1", RTLD_LAZY | RTLD_LOCAL);
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if (libGL == NULL) {
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libGL = dlopen("libGL.so", RTLD_LAZY | RTLD_LOCAL);
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}
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return libGL != NULL;
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}
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static void close_gl(void) {
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if (libGL != NULL) {
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dlclose(libGL);
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libGL = NULL;
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}
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}
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static GLADapiproc get_proc(const char *name) {
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if (libGL == NULL) return NULL;
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return (GLADapiproc)dlsym(libGL, name);
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}
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#endif
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/* Function pointers */
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PFNGLACTIVETEXTUREPROC glad_glActiveTexture = NULL;
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PFNGLATTACHSHADERPROC glad_glAttachShader = NULL;
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PFNGLBINDBUFFERPROC glad_glBindBuffer = NULL;
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PFNGLBINDBUFFERBASEPROC glad_glBindBufferBase = NULL;
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PFNGLBINDFRAMEBUFFERPROC glad_glBindFramebuffer = NULL;
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PFNGLBINDRENDERBUFFERPROC glad_glBindRenderbuffer = NULL;
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PFNGLBINDTEXTUREPROC glad_glBindTexture = NULL;
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PFNGLBINDVERTEXARRAYPROC glad_glBindVertexArray = NULL;
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PFNGLBLENDCOLORPROC glad_glBlendColor = NULL;
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PFNGLBLENDEQUATIONPROC glad_glBlendEquation = NULL;
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PFNGLBLENDEQUATIONSEPARATEPROC glad_glBlendEquationSeparate = NULL;
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PFNGLBLENDFUNCPROC glad_glBlendFunc = NULL;
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PFNGLBLENDFUNCSEPARATEPROC glad_glBlendFuncSeparate = NULL;
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PFNGLBLITFRAMEBUFFERPROC glad_glBlitFramebuffer = NULL;
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PFNGLBUFFERDATAPROC glad_glBufferData = NULL;
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PFNGLBUFFERSUBDATAPROC glad_glBufferSubData = NULL;
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PFNGLCHECKFRAMEBUFFERSTATUSPROC glad_glCheckFramebufferStatus = NULL;
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PFNGLCLEARPROC glad_glClear = NULL;
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PFNGLCLEARCOLORPROC glad_glClearColor = NULL;
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PFNGLCLEARDEPTHPROC glad_glClearDepth = NULL;
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PFNGLCLEARSTENCILPROC glad_glClearStencil = NULL;
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PFNGLCOLORMASKPROC glad_glColorMask = NULL;
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PFNGLCOMPILESHADERPROC glad_glCompileShader = NULL;
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PFNGLCREATEPROGRAMPROC glad_glCreateProgram = NULL;
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PFNGLCREATESHADERPROC glad_glCreateShader = NULL;
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PFNGLCULLFACEPROC glad_glCullFace = NULL;
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PFNGLDELETEBUFFERSPROC glad_glDeleteBuffers = NULL;
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PFNGLDELETEFRAMEBUFFERSPROC glad_glDeleteFramebuffers = NULL;
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PFNGLDELETEPROGRAMPROC glad_glDeleteProgram = NULL;
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PFNGLDELETERENDERBUFFERSPROC glad_glDeleteRenderbuffers = NULL;
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PFNGLDELETESHADERPROC glad_glDeleteShader = NULL;
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PFNGLDELETETEXTURESPROC glad_glDeleteTextures = NULL;
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PFNGLDELETEVERTEXARRAYSPROC glad_glDeleteVertexArrays = NULL;
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PFNGLDEPTHFUNCPROC glad_glDepthFunc = NULL;
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PFNGLDEPTHMASKPROC glad_glDepthMask = NULL;
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PFNGLDISABLEPROC glad_glDisable = NULL;
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PFNGLDISABLEVERTEXATTRIBARRAYPROC glad_glDisableVertexAttribArray = NULL;
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PFNGLDRAWARRAYSPROC glad_glDrawArrays = NULL;
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PFNGLDRAWBUFFERSPROC glad_glDrawBuffers = NULL;
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PFNGLDRAWELEMENTSPROC glad_glDrawElements = NULL;
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PFNGLENABLEPROC glad_glEnable = NULL;
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PFNGLENABLEVERTEXATTRIBARRAYPROC glad_glEnableVertexAttribArray = NULL;
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PFNGLFINISHPROC glad_glFinish = NULL;
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PFNGLFLUSHPROC glad_glFlush = NULL;
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PFNGLFRAMEBUFFERRENDERBUFFERPROC glad_glFramebufferRenderbuffer = NULL;
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PFNGLFRAMEBUFFERTEXTURE2DPROC glad_glFramebufferTexture2D = NULL;
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PFNGLFRONTFACEPROC glad_glFrontFace = NULL;
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PFNGLGENBUFFERSPROC glad_glGenBuffers = NULL;
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PFNGLGENFRAMEBUFFERSPROC glad_glGenFramebuffers = NULL;
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PFNGLGENRENDERBUFFERSPROC glad_glGenRenderbuffers = NULL;
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PFNGLGENTEXTURESPROC glad_glGenTextures = NULL;
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PFNGLGENVERTEXARRAYSPROC glad_glGenVertexArrays = NULL;
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PFNGLGENERATEMIPMAPPROC glad_glGenerateMipmap = NULL;
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PFNGLGETATTRIBLOCATIONPROC glad_glGetAttribLocation = NULL;
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PFNGLGETERRORPROC glad_glGetError = NULL;
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PFNGLGETINTEGERVPROC glad_glGetIntegerv = NULL;
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PFNGLGETPROGRAMINFOLOGPROC glad_glGetProgramInfoLog = NULL;
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PFNGLGETPROGRAMIVPROC glad_glGetProgramiv = NULL;
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PFNGLGETSHADERINFOLOGPROC glad_glGetShaderInfoLog = NULL;
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PFNGLGETSHADERIVPROC glad_glGetShaderiv = NULL;
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PFNGLGETSTRINGPROC glad_glGetString = NULL;
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PFNGLGETSTRINGIPROC glad_glGetStringi = NULL;
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PFNGLGETUNIFORMLOCATIONPROC glad_glGetUniformLocation = NULL;
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PFNGLISENABLEDPROC glad_glIsEnabled = NULL;
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PFNGLLINKPROGRAMPROC glad_glLinkProgram = NULL;
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PFNGLMAPBUFFERPROC glad_glMapBuffer = NULL;
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PFNGLPIXELSTOREIPROC glad_glPixelStorei = NULL;
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PFNGLPOLYGONMODEPROC glad_glPolygonMode = NULL;
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PFNGLREADPIXELSPROC glad_glReadPixels = NULL;
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PFNGLRENDERBUFFERSTORAGEPROC glad_glRenderbufferStorage = NULL;
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PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC glad_glRenderbufferStorageMultisample = NULL;
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PFNGLSCISSORPROC glad_glScissor = NULL;
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PFNGLSHADERSOURCEPROC glad_glShaderSource = NULL;
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PFNGLSTENCILFUNCPROC glad_glStencilFunc = NULL;
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PFNGLSTENCILFUNCSEPARATEPROC glad_glStencilFuncSeparate = NULL;
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PFNGLSTENCILMASKPROC glad_glStencilMask = NULL;
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PFNGLSTENCILMASKSEPARATEPROC glad_glStencilMaskSeparate = NULL;
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PFNGLSTENCILOPPROC glad_glStencilOp = NULL;
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PFNGLSTENCILOPSEPARATEPROC glad_glStencilOpSeparate = NULL;
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PFNGLTEXIMAGE2DPROC glad_glTexImage2D = NULL;
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PFNGLTEXPARAMETERFPROC glad_glTexParameterf = NULL;
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PFNGLTEXPARAMETERIPROC glad_glTexParameteri = NULL;
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PFNGLTEXSUBIMAGE2DPROC glad_glTexSubImage2D = NULL;
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PFNGLUNIFORM1FPROC glad_glUniform1f = NULL;
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PFNGLUNIFORM1FVPROC glad_glUniform1fv = NULL;
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PFNGLUNIFORM1IPROC glad_glUniform1i = NULL;
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PFNGLUNIFORM2FPROC glad_glUniform2f = NULL;
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PFNGLUNIFORM2FVPROC glad_glUniform2fv = NULL;
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PFNGLUNIFORM3FPROC glad_glUniform3f = NULL;
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PFNGLUNIFORM4FPROC glad_glUniform4f = NULL;
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PFNGLUNIFORM4FVPROC glad_glUniform4fv = NULL;
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PFNGLUNIFORMMATRIX4FVPROC glad_glUniformMatrix4fv = NULL;
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PFNGLUNMAPBUFFERPROC glad_glUnmapBuffer = NULL;
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PFNGLUSEPROGRAMPROC glad_glUseProgram = NULL;
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PFNGLVERTEXATTRIBPOINTERPROC glad_glVertexAttribPointer = NULL;
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PFNGLVIEWPORTPROC glad_glViewport = NULL;
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static void load_GL_VERSION_1_0(GLADloadfunc load) {
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glad_glClear = (PFNGLCLEARPROC)load("glClear");
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glad_glClearColor = (PFNGLCLEARCOLORPROC)load("glClearColor");
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glad_glClearDepth = (PFNGLCLEARDEPTHPROC)load("glClearDepth");
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glad_glClearStencil = (PFNGLCLEARSTENCILPROC)load("glClearStencil");
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glad_glColorMask = (PFNGLCOLORMASKPROC)load("glColorMask");
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glad_glCullFace = (PFNGLCULLFACEPROC)load("glCullFace");
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glad_glDepthFunc = (PFNGLDEPTHFUNCPROC)load("glDepthFunc");
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glad_glDepthMask = (PFNGLDEPTHMASKPROC)load("glDepthMask");
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glad_glDisable = (PFNGLDISABLEPROC)load("glDisable");
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glad_glDrawArrays = (PFNGLDRAWARRAYSPROC)load("glDrawArrays");
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glad_glDrawElements = (PFNGLDRAWELEMENTSPROC)load("glDrawElements");
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glad_glEnable = (PFNGLENABLEPROC)load("glEnable");
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glad_glFinish = (PFNGLFINISHPROC)load("glFinish");
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glad_glFlush = (PFNGLFLUSHPROC)load("glFlush");
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glad_glFrontFace = (PFNGLFRONTFACEPROC)load("glFrontFace");
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glad_glGetError = (PFNGLGETERRORPROC)load("glGetError");
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glad_glGetIntegerv = (PFNGLGETINTEGERVPROC)load("glGetIntegerv");
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glad_glGetString = (PFNGLGETSTRINGPROC)load("glGetString");
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glad_glIsEnabled = (PFNGLISENABLEDPROC)load("glIsEnabled");
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glad_glPixelStorei = (PFNGLPIXELSTOREIPROC)load("glPixelStorei");
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glad_glPolygonMode = (PFNGLPOLYGONMODEPROC)load("glPolygonMode");
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glad_glReadPixels = (PFNGLREADPIXELSPROC)load("glReadPixels");
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glad_glScissor = (PFNGLSCISSORPROC)load("glScissor");
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glad_glStencilFunc = (PFNGLSTENCILFUNCPROC)load("glStencilFunc");
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glad_glStencilMask = (PFNGLSTENCILMASKPROC)load("glStencilMask");
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glad_glStencilOp = (PFNGLSTENCILOPPROC)load("glStencilOp");
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glad_glTexImage2D = (PFNGLTEXIMAGE2DPROC)load("glTexImage2D");
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glad_glTexParameterf = (PFNGLTEXPARAMETERFPROC)load("glTexParameterf");
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glad_glTexParameteri = (PFNGLTEXPARAMETERIPROC)load("glTexParameteri");
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glad_glViewport = (PFNGLVIEWPORTPROC)load("glViewport");
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}
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static void load_GL_VERSION_1_1(GLADloadfunc load) {
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glad_glBindTexture = (PFNGLBINDTEXTUREPROC)load("glBindTexture");
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glad_glDeleteTextures = (PFNGLDELETETEXTURESPROC)load("glDeleteTextures");
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glad_glGenTextures = (PFNGLGENTEXTURESPROC)load("glGenTextures");
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glad_glTexSubImage2D = (PFNGLTEXSUBIMAGE2DPROC)load("glTexSubImage2D");
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}
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static void load_GL_VERSION_1_3(GLADloadfunc load) {
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glad_glActiveTexture = (PFNGLACTIVETEXTUREPROC)load("glActiveTexture");
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}
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static void load_GL_VERSION_1_4(GLADloadfunc load) {
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glad_glBlendColor = (PFNGLBLENDCOLORPROC)load("glBlendColor");
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glad_glBlendEquation = (PFNGLBLENDEQUATIONPROC)load("glBlendEquation");
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glad_glBlendFuncSeparate = (PFNGLBLENDFUNCSEPARATEPROC)load("glBlendFuncSeparate");
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}
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static void load_GL_VERSION_1_5(GLADloadfunc load) {
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glad_glBindBuffer = (PFNGLBINDBUFFERPROC)load("glBindBuffer");
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glad_glBufferData = (PFNGLBUFFERDATAPROC)load("glBufferData");
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glad_glBufferSubData = (PFNGLBUFFERSUBDATAPROC)load("glBufferSubData");
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glad_glDeleteBuffers = (PFNGLDELETEBUFFERSPROC)load("glDeleteBuffers");
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glad_glGenBuffers = (PFNGLGENBUFFERSPROC)load("glGenBuffers");
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glad_glMapBuffer = (PFNGLMAPBUFFERPROC)load("glMapBuffer");
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glad_glUnmapBuffer = (PFNGLUNMAPBUFFERPROC)load("glUnmapBuffer");
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}
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static void load_GL_VERSION_2_0(GLADloadfunc load) {
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glad_glAttachShader = (PFNGLATTACHSHADERPROC)load("glAttachShader");
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glad_glBlendEquationSeparate = (PFNGLBLENDEQUATIONSEPARATEPROC)load("glBlendEquationSeparate");
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glad_glBlendFunc = (PFNGLBLENDFUNCPROC)load("glBlendFunc");
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glad_glCompileShader = (PFNGLCOMPILESHADERPROC)load("glCompileShader");
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glad_glCreateProgram = (PFNGLCREATEPROGRAMPROC)load("glCreateProgram");
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glad_glCreateShader = (PFNGLCREATESHADERPROC)load("glCreateShader");
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glad_glDeleteProgram = (PFNGLDELETEPROGRAMPROC)load("glDeleteProgram");
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glad_glDeleteShader = (PFNGLDELETESHADERPROC)load("glDeleteShader");
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glad_glDisableVertexAttribArray = (PFNGLDISABLEVERTEXATTRIBARRAYPROC)load("glDisableVertexAttribArray");
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glad_glDrawBuffers = (PFNGLDRAWBUFFERSPROC)load("glDrawBuffers");
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glad_glEnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)load("glEnableVertexAttribArray");
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glad_glGetAttribLocation = (PFNGLGETATTRIBLOCATIONPROC)load("glGetAttribLocation");
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glad_glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)load("glGetProgramInfoLog");
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glad_glGetProgramiv = (PFNGLGETPROGRAMIVPROC)load("glGetProgramiv");
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glad_glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)load("glGetShaderInfoLog");
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glad_glGetShaderiv = (PFNGLGETSHADERIVPROC)load("glGetShaderiv");
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glad_glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)load("glGetUniformLocation");
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glad_glLinkProgram = (PFNGLLINKPROGRAMPROC)load("glLinkProgram");
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glad_glShaderSource = (PFNGLSHADERSOURCEPROC)load("glShaderSource");
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glad_glStencilFuncSeparate = (PFNGLSTENCILFUNCSEPARATEPROC)load("glStencilFuncSeparate");
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glad_glStencilMaskSeparate = (PFNGLSTENCILMASKSEPARATEPROC)load("glStencilMaskSeparate");
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glad_glStencilOpSeparate = (PFNGLSTENCILOPSEPARATEPROC)load("glStencilOpSeparate");
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glad_glUniform1f = (PFNGLUNIFORM1FPROC)load("glUniform1f");
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glad_glUniform1fv = (PFNGLUNIFORM1FVPROC)load("glUniform1fv");
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glad_glUniform1i = (PFNGLUNIFORM1IPROC)load("glUniform1i");
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glad_glUniform2f = (PFNGLUNIFORM2FPROC)load("glUniform2f");
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glad_glUniform2fv = (PFNGLUNIFORM2FVPROC)load("glUniform2fv");
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glad_glUniform3f = (PFNGLUNIFORM3FPROC)load("glUniform3f");
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glad_glUniform4f = (PFNGLUNIFORM4FPROC)load("glUniform4f");
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glad_glUniform4fv = (PFNGLUNIFORM4FVPROC)load("glUniform4fv");
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glad_glUniformMatrix4fv = (PFNGLUNIFORMMATRIX4FVPROC)load("glUniformMatrix4fv");
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glad_glUseProgram = (PFNGLUSEPROGRAMPROC)load("glUseProgram");
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glad_glVertexAttribPointer = (PFNGLVERTEXATTRIBPOINTERPROC)load("glVertexAttribPointer");
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}
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static void load_GL_VERSION_3_0(GLADloadfunc load) {
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glad_glBindBufferBase = (PFNGLBINDBUFFERBASEPROC)load("glBindBufferBase");
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glad_glBindFramebuffer = (PFNGLBINDFRAMEBUFFERPROC)load("glBindFramebuffer");
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glad_glBindRenderbuffer = (PFNGLBINDRENDERBUFFERPROC)load("glBindRenderbuffer");
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glad_glBindVertexArray = (PFNGLBINDVERTEXARRAYPROC)load("glBindVertexArray");
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glad_glBlitFramebuffer = (PFNGLBLITFRAMEBUFFERPROC)load("glBlitFramebuffer");
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glad_glCheckFramebufferStatus = (PFNGLCHECKFRAMEBUFFERSTATUSPROC)load("glCheckFramebufferStatus");
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glad_glDeleteFramebuffers = (PFNGLDELETEFRAMEBUFFERSPROC)load("glDeleteFramebuffers");
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glad_glDeleteRenderbuffers = (PFNGLDELETERENDERBUFFERSPROC)load("glDeleteRenderbuffers");
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glad_glDeleteVertexArrays = (PFNGLDELETEVERTEXARRAYSPROC)load("glDeleteVertexArrays");
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glad_glFramebufferRenderbuffer = (PFNGLFRAMEBUFFERRENDERBUFFERPROC)load("glFramebufferRenderbuffer");
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glad_glFramebufferTexture2D = (PFNGLFRAMEBUFFERTEXTURE2DPROC)load("glFramebufferTexture2D");
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glad_glGenFramebuffers = (PFNGLGENFRAMEBUFFERSPROC)load("glGenFramebuffers");
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glad_glGenRenderbuffers = (PFNGLGENRENDERBUFFERSPROC)load("glGenRenderbuffers");
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glad_glGenVertexArrays = (PFNGLGENVERTEXARRAYSPROC)load("glGenVertexArrays");
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glad_glGenerateMipmap = (PFNGLGENERATEMIPMAPPROC)load("glGenerateMipmap");
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glad_glGetStringi = (PFNGLGETSTRINGIPROC)load("glGetStringi");
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glad_glRenderbufferStorage = (PFNGLRENDERBUFFERSTORAGEPROC)load("glRenderbufferStorage");
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glad_glRenderbufferStorageMultisample = (PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC)load("glRenderbufferStorageMultisample");
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}
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int gladLoadGL(GLADloadfunc load) {
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load_GL_VERSION_1_0(load);
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load_GL_VERSION_1_1(load);
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load_GL_VERSION_1_3(load);
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load_GL_VERSION_1_4(load);
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load_GL_VERSION_1_5(load);
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load_GL_VERSION_2_0(load);
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load_GL_VERSION_3_0(load);
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return GLAD_MAKE_VERSION(3, 3);
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}
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int gladLoadGLUserPtr(GLADloadfunc load, void *userptr) {
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(void)userptr;
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return gladLoadGL(load);
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}
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