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This commit is contained in:
Camilla Berglund 2015-11-09 16:51:27 +01:00
parent d3e5a3024c
commit b22a0ec7d8
2 changed files with 95 additions and 102 deletions
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152
src/wgl_context.c
View File

@ -34,49 +34,51 @@
// Initialize WGL-specific extensions // Initialize WGL-specific extensions
// //
static void initWGLExtensions(_GLFWwindow* window) static void loadExtensions(void)
{ {
// Functions for WGL_EXT_extension_string // Functions for WGL_EXT_extension_string
// NOTE: These are needed by _glfwPlatformExtensionSupported // NOTE: These are needed by _glfwPlatformExtensionSupported
window->wgl.GetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC) _glfw.wgl.GetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC)
_glfw_wglGetProcAddress("wglGetExtensionsStringEXT"); _glfw_wglGetProcAddress("wglGetExtensionsStringEXT");
window->wgl.GetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC) _glfw.wgl.GetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)
_glfw_wglGetProcAddress("wglGetExtensionsStringARB"); _glfw_wglGetProcAddress("wglGetExtensionsStringARB");
// Functions for WGL_ARB_create_context // Functions for WGL_ARB_create_context
window->wgl.CreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) _glfw.wgl.CreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)
_glfw_wglGetProcAddress("wglCreateContextAttribsARB"); _glfw_wglGetProcAddress("wglCreateContextAttribsARB");
// Functions for WGL_EXT_swap_control // Functions for WGL_EXT_swap_control
window->wgl.SwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC) _glfw.wgl.SwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)
_glfw_wglGetProcAddress("wglSwapIntervalEXT"); _glfw_wglGetProcAddress("wglSwapIntervalEXT");
// Functions for WGL_ARB_pixel_format // Functions for WGL_ARB_pixel_format
window->wgl.GetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC) _glfw.wgl.GetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC)
_glfw_wglGetProcAddress("wglGetPixelFormatAttribivARB"); _glfw_wglGetProcAddress("wglGetPixelFormatAttribivARB");
// This needs to include every extension used below except for // This needs to include every extension used below except for
// WGL_ARB_extensions_string and WGL_EXT_extensions_string // WGL_ARB_extensions_string and WGL_EXT_extensions_string
window->wgl.ARB_multisample = _glfw.wgl.ARB_multisample =
_glfwPlatformExtensionSupported("WGL_ARB_multisample"); _glfwPlatformExtensionSupported("WGL_ARB_multisample");
window->wgl.ARB_framebuffer_sRGB = _glfw.wgl.ARB_framebuffer_sRGB =
_glfwPlatformExtensionSupported("WGL_ARB_framebuffer_sRGB"); _glfwPlatformExtensionSupported("WGL_ARB_framebuffer_sRGB");
window->wgl.EXT_framebuffer_sRGB = _glfw.wgl.EXT_framebuffer_sRGB =
_glfwPlatformExtensionSupported("WGL_EXT_framebuffer_sRGB"); _glfwPlatformExtensionSupported("WGL_EXT_framebuffer_sRGB");
window->wgl.ARB_create_context = _glfw.wgl.ARB_create_context =
_glfwPlatformExtensionSupported("WGL_ARB_create_context"); _glfwPlatformExtensionSupported("WGL_ARB_create_context");
window->wgl.ARB_create_context_profile = _glfw.wgl.ARB_create_context_profile =
_glfwPlatformExtensionSupported("WGL_ARB_create_context_profile"); _glfwPlatformExtensionSupported("WGL_ARB_create_context_profile");
window->wgl.EXT_create_context_es2_profile = _glfw.wgl.EXT_create_context_es2_profile =
_glfwPlatformExtensionSupported("WGL_EXT_create_context_es2_profile"); _glfwPlatformExtensionSupported("WGL_EXT_create_context_es2_profile");
window->wgl.ARB_create_context_robustness = _glfw.wgl.ARB_create_context_robustness =
_glfwPlatformExtensionSupported("WGL_ARB_create_context_robustness"); _glfwPlatformExtensionSupported("WGL_ARB_create_context_robustness");
window->wgl.EXT_swap_control = _glfw.wgl.EXT_swap_control =
_glfwPlatformExtensionSupported("WGL_EXT_swap_control"); _glfwPlatformExtensionSupported("WGL_EXT_swap_control");
window->wgl.ARB_pixel_format = _glfw.wgl.ARB_pixel_format =
_glfwPlatformExtensionSupported("WGL_ARB_pixel_format"); _glfwPlatformExtensionSupported("WGL_ARB_pixel_format");
window->wgl.ARB_context_flush_control = _glfw.wgl.ARB_context_flush_control =
_glfwPlatformExtensionSupported("WGL_ARB_context_flush_control"); _glfwPlatformExtensionSupported("WGL_ARB_context_flush_control");
_glfw.wgl.extensionsLoaded = GLFW_TRUE;
} }
// Returns the specified attribute of the specified pixel format // Returns the specified attribute of the specified pixel format
@ -85,11 +87,11 @@ static int getPixelFormatAttrib(_GLFWwindow* window, int pixelFormat, int attrib
{ {
int value = 0; int value = 0;
assert(window->wgl.ARB_pixel_format); assert(_glfw.wgl.ARB_pixel_format);
if (!window->wgl.GetPixelFormatAttribivARB(window->wgl.dc, if (!_glfw.wgl.GetPixelFormatAttribivARB(window->wgl.dc,
pixelFormat, pixelFormat,
0, 1, &attrib, &value)) 0, 1, &attrib, &value))
{ {
_glfwInputError(GLFW_PLATFORM_ERROR, _glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Failed to retrieve pixel format attribute %i", "WGL: Failed to retrieve pixel format attribute %i",
@ -110,7 +112,7 @@ static GLFWbool choosePixelFormat(_GLFWwindow* window,
const _GLFWfbconfig* closest; const _GLFWfbconfig* closest;
int i, nativeCount, usableCount; int i, nativeCount, usableCount;
if (window->wgl.ARB_pixel_format) if (_glfw.wgl.ARB_pixel_format)
{ {
nativeCount = getPixelFormatAttrib(window, nativeCount = getPixelFormatAttrib(window,
1, 1,
@ -132,7 +134,7 @@ static GLFWbool choosePixelFormat(_GLFWwindow* window,
const int n = i + 1; const int n = i + 1;
_GLFWfbconfig* u = usableConfigs + usableCount; _GLFWfbconfig* u = usableConfigs + usableCount;
if (window->wgl.ARB_pixel_format) if (_glfw.wgl.ARB_pixel_format)
{ {
// Get pixel format attributes through "modern" extension // Get pixel format attributes through "modern" extension
@ -174,11 +176,11 @@ static GLFWbool choosePixelFormat(_GLFWwindow* window,
if (getPixelFormatAttrib(window, n, WGL_DOUBLE_BUFFER_ARB)) if (getPixelFormatAttrib(window, n, WGL_DOUBLE_BUFFER_ARB))
u->doublebuffer = GLFW_TRUE; u->doublebuffer = GLFW_TRUE;
if (window->wgl.ARB_multisample) if (_glfw.wgl.ARB_multisample)
u->samples = getPixelFormatAttrib(window, n, WGL_SAMPLES_ARB); u->samples = getPixelFormatAttrib(window, n, WGL_SAMPLES_ARB);
if (window->wgl.ARB_framebuffer_sRGB || if (_glfw.wgl.ARB_framebuffer_sRGB ||
window->wgl.EXT_framebuffer_sRGB) _glfw.wgl.EXT_framebuffer_sRGB)
{ {
if (getPixelFormatAttrib(window, n, WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB)) if (getPixelFormatAttrib(window, n, WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB))
u->sRGB = GLFW_TRUE; u->sRGB = GLFW_TRUE;
@ -275,34 +277,23 @@ int _glfwInitContextAPI(void)
if (!_glfwCreateContextTLS()) if (!_glfwCreateContextTLS())
return GLFW_FALSE; return GLFW_FALSE;
_glfw.wgl.opengl32.instance = LoadLibraryA("opengl32.dll"); _glfw.wgl.instance = LoadLibraryA("opengl32.dll");
if (!_glfw.wgl.opengl32.instance) if (!_glfw.wgl.instance)
{ {
_glfwInputError(GLFW_PLATFORM_ERROR, "WGL: Failed to load opengl32.dll"); _glfwInputError(GLFW_PLATFORM_ERROR, "WGL: Failed to load opengl32.dll");
return GLFW_FALSE; return GLFW_FALSE;
} }
_glfw.wgl.opengl32.CreateContext = (WGLCREATECONTEXT_T) _glfw.wgl.CreateContext = (WGLCREATECONTEXT_T)
GetProcAddress(_glfw.wgl.opengl32.instance, "wglCreateContext"); GetProcAddress(_glfw.wgl.instance, "wglCreateContext");
_glfw.wgl.opengl32.DeleteContext = (WGLDELETECONTEXT_T) _glfw.wgl.DeleteContext = (WGLDELETECONTEXT_T)
GetProcAddress(_glfw.wgl.opengl32.instance, "wglDeleteContext"); GetProcAddress(_glfw.wgl.instance, "wglDeleteContext");
_glfw.wgl.opengl32.GetProcAddress = (WGLGETPROCADDRESS_T) _glfw.wgl.GetProcAddress = (WGLGETPROCADDRESS_T)
GetProcAddress(_glfw.wgl.opengl32.instance, "wglGetProcAddress"); GetProcAddress(_glfw.wgl.instance, "wglGetProcAddress");
_glfw.wgl.opengl32.MakeCurrent = (WGLMAKECURRENT_T) _glfw.wgl.MakeCurrent = (WGLMAKECURRENT_T)
GetProcAddress(_glfw.wgl.opengl32.instance, "wglMakeCurrent"); GetProcAddress(_glfw.wgl.instance, "wglMakeCurrent");
_glfw.wgl.opengl32.ShareLists = (WGLSHARELISTS_T) _glfw.wgl.ShareLists = (WGLSHARELISTS_T)
GetProcAddress(_glfw.wgl.opengl32.instance, "wglShareLists"); GetProcAddress(_glfw.wgl.instance, "wglShareLists");
if (!_glfw.wgl.opengl32.CreateContext ||
!_glfw.wgl.opengl32.DeleteContext ||
!_glfw.wgl.opengl32.GetProcAddress ||
!_glfw.wgl.opengl32.MakeCurrent ||
!_glfw.wgl.opengl32.ShareLists)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Failed to load opengl32 functions");
return GLFW_FALSE;
}
return GLFW_TRUE; return GLFW_TRUE;
} }
@ -311,8 +302,8 @@ int _glfwInitContextAPI(void)
// //
void _glfwTerminateContextAPI(void) void _glfwTerminateContextAPI(void)
{ {
if (_glfw.wgl.opengl32.instance) if (_glfw.wgl.instance)
FreeLibrary(_glfw.wgl.opengl32.instance); FreeLibrary(_glfw.wgl.instance);
_glfwDestroyContextTLS(); _glfwDestroyContextTLS();
} }
@ -363,7 +354,7 @@ int _glfwCreateContext(_GLFWwindow* window,
return GLFW_FALSE; return GLFW_FALSE;
} }
if (window->wgl.ARB_create_context) if (_glfw.wgl.ARB_create_context)
{ {
int index = 0, mask = 0, flags = 0; int index = 0, mask = 0, flags = 0;
@ -387,7 +378,7 @@ int _glfwCreateContext(_GLFWwindow* window,
if (ctxconfig->robustness) if (ctxconfig->robustness)
{ {
if (window->wgl.ARB_create_context_robustness) if (_glfw.wgl.ARB_create_context_robustness)
{ {
if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION) if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION)
{ {
@ -406,7 +397,7 @@ int _glfwCreateContext(_GLFWwindow* window,
if (ctxconfig->release) if (ctxconfig->release)
{ {
if (window->wgl.ARB_context_flush_control) if (_glfw.wgl.ARB_context_flush_control)
{ {
if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_NONE) if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_NONE)
{ {
@ -438,9 +429,9 @@ int _glfwCreateContext(_GLFWwindow* window,
setWGLattrib(0, 0); setWGLattrib(0, 0);
window->wgl.context = window->wgl.CreateContextAttribsARB(window->wgl.dc, window->wgl.context = _glfw.wgl.CreateContextAttribsARB(window->wgl.dc,
share, share,
attribs); attribs);
if (!window->wgl.context) if (!window->wgl.context)
{ {
_glfwInputError(GLFW_VERSION_UNAVAILABLE, _glfwInputError(GLFW_VERSION_UNAVAILABLE,
@ -469,9 +460,6 @@ int _glfwCreateContext(_GLFWwindow* window,
} }
} }
_glfwPlatformMakeContextCurrent(window);
initWGLExtensions(window);
return GLFW_TRUE; return GLFW_TRUE;
} }
@ -496,17 +484,23 @@ void _glfwDestroyContext(_GLFWwindow* window)
// Analyzes the specified context for possible recreation // Analyzes the specified context for possible recreation
// //
int _glfwAnalyzeContext(const _GLFWwindow* window, int _glfwAnalyzeContext(_GLFWwindow* window,
const _GLFWctxconfig* ctxconfig, const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig) const _GLFWfbconfig* fbconfig)
{ {
GLFWbool required = GLFW_FALSE; GLFWbool required = GLFW_FALSE;
if (_glfw.wgl.extensionsLoaded)
return _GLFW_RECREATION_NOT_NEEDED;
_glfwPlatformMakeContextCurrent(window);
loadExtensions();
if (ctxconfig->api == GLFW_OPENGL_API) if (ctxconfig->api == GLFW_OPENGL_API)
{ {
if (ctxconfig->forward) if (ctxconfig->forward)
{ {
if (!window->wgl.ARB_create_context) if (!_glfw.wgl.ARB_create_context)
{ {
_glfwInputError(GLFW_VERSION_UNAVAILABLE, _glfwInputError(GLFW_VERSION_UNAVAILABLE,
"WGL: A forward compatible OpenGL context requested but WGL_ARB_create_context is unavailable"); "WGL: A forward compatible OpenGL context requested but WGL_ARB_create_context is unavailable");
@ -518,7 +512,7 @@ int _glfwAnalyzeContext(const _GLFWwindow* window,
if (ctxconfig->profile) if (ctxconfig->profile)
{ {
if (!window->wgl.ARB_create_context_profile) if (!_glfw.wgl.ARB_create_context_profile)
{ {
_glfwInputError(GLFW_VERSION_UNAVAILABLE, _glfwInputError(GLFW_VERSION_UNAVAILABLE,
"WGL: OpenGL profile requested but WGL_ARB_create_context_profile is unavailable"); "WGL: OpenGL profile requested but WGL_ARB_create_context_profile is unavailable");
@ -530,15 +524,15 @@ int _glfwAnalyzeContext(const _GLFWwindow* window,
if (ctxconfig->release) if (ctxconfig->release)
{ {
if (window->wgl.ARB_context_flush_control) if (_glfw.wgl.ARB_context_flush_control)
required = GLFW_TRUE; required = GLFW_TRUE;
} }
} }
else else
{ {
if (!window->wgl.ARB_create_context || if (!_glfw.wgl.ARB_create_context ||
!window->wgl.ARB_create_context_profile || !_glfw.wgl.ARB_create_context_profile ||
!window->wgl.EXT_create_context_es2_profile) !_glfw.wgl.EXT_create_context_es2_profile)
{ {
_glfwInputError(GLFW_API_UNAVAILABLE, _glfwInputError(GLFW_API_UNAVAILABLE,
"WGL: OpenGL ES requested but WGL_ARB_create_context_es2_profile is unavailable"); "WGL: OpenGL ES requested but WGL_ARB_create_context_es2_profile is unavailable");
@ -550,29 +544,29 @@ int _glfwAnalyzeContext(const _GLFWwindow* window,
if (ctxconfig->major != 1 || ctxconfig->minor != 0) if (ctxconfig->major != 1 || ctxconfig->minor != 0)
{ {
if (window->wgl.ARB_create_context) if (_glfw.wgl.ARB_create_context)
required = GLFW_TRUE; required = GLFW_TRUE;
} }
if (ctxconfig->debug) if (ctxconfig->debug)
{ {
if (window->wgl.ARB_create_context) if (_glfw.wgl.ARB_create_context)
required = GLFW_TRUE; required = GLFW_TRUE;
} }
if (fbconfig->samples > 0) if (fbconfig->samples > 0)
{ {
// MSAA is not a hard constraint, so do nothing if it's not supported // MSAA is not a hard constraint, so do nothing if it's not supported
if (window->wgl.ARB_multisample && window->wgl.ARB_pixel_format) if (_glfw.wgl.ARB_multisample && _glfw.wgl.ARB_pixel_format)
required = GLFW_TRUE; required = GLFW_TRUE;
} }
if (fbconfig->sRGB) if (fbconfig->sRGB)
{ {
// sRGB is not a hard constraint, so do nothing if it's not supported // sRGB is not a hard constraint, so do nothing if it's not supported
if ((window->wgl.ARB_framebuffer_sRGB || if ((_glfw.wgl.ARB_framebuffer_sRGB ||
window->wgl.EXT_framebuffer_sRGB) && _glfw.wgl.EXT_framebuffer_sRGB) &&
window->wgl.ARB_pixel_format) _glfw.wgl.ARB_pixel_format)
{ {
required = GLFW_TRUE; required = GLFW_TRUE;
} }
@ -623,8 +617,8 @@ void _glfwPlatformSwapInterval(int interval)
if (_glfwIsCompositionEnabled() && !window->monitor) if (_glfwIsCompositionEnabled() && !window->monitor)
interval = 0; interval = 0;
if (window->wgl.EXT_swap_control) if (_glfw.wgl.EXT_swap_control)
window->wgl.SwapIntervalEXT(interval); _glfw.wgl.SwapIntervalEXT(interval);
} }
int _glfwPlatformExtensionSupported(const char* extension) int _glfwPlatformExtensionSupported(const char* extension)
@ -633,9 +627,9 @@ int _glfwPlatformExtensionSupported(const char* extension)
_GLFWwindow* window = _glfwPlatformGetCurrentContext(); _GLFWwindow* window = _glfwPlatformGetCurrentContext();
if (window->wgl.GetExtensionsStringEXT != NULL) if (_glfw.wgl.GetExtensionsStringEXT)
{ {
extensions = window->wgl.GetExtensionsStringEXT(); extensions = _glfw.wgl.GetExtensionsStringEXT();
if (extensions) if (extensions)
{ {
if (_glfwStringInExtensionString(extension, extensions)) if (_glfwStringInExtensionString(extension, extensions))
@ -643,9 +637,9 @@ int _glfwPlatformExtensionSupported(const char* extension)
} }
} }
if (window->wgl.GetExtensionsStringARB != NULL) if (_glfw.wgl.GetExtensionsStringARB)
{ {
extensions = window->wgl.GetExtensionsStringARB(window->wgl.dc); extensions = _glfw.wgl.GetExtensionsStringARB(window->wgl.dc);
if (extensions) if (extensions)
{ {
if (_glfwStringInExtensionString(extension, extensions)) if (_glfwStringInExtensionString(extension, extensions))
@ -662,7 +656,7 @@ GLFWglproc _glfwPlatformGetProcAddress(const char* procname)
if (proc) if (proc)
return proc; return proc;
return (GLFWglproc) GetProcAddress(_glfw.wgl.opengl32.instance, procname); return (GLFWglproc) GetProcAddress(_glfw.wgl.instance, procname);
} }

45
src/wgl_context.h
View File

@ -86,11 +86,11 @@ typedef BOOL (WINAPI * WGLMAKECURRENT_T)(HDC,HGLRC);
typedef BOOL (WINAPI * WGLSHARELISTS_T)(HGLRC,HGLRC); typedef BOOL (WINAPI * WGLSHARELISTS_T)(HGLRC,HGLRC);
// opengl32.dll function pointer typedefs // opengl32.dll function pointer typedefs
#define _glfw_wglCreateContext _glfw.wgl.opengl32.CreateContext #define _glfw_wglCreateContext _glfw.wgl.CreateContext
#define _glfw_wglDeleteContext _glfw.wgl.opengl32.DeleteContext #define _glfw_wglDeleteContext _glfw.wgl.DeleteContext
#define _glfw_wglGetProcAddress _glfw.wgl.opengl32.GetProcAddress #define _glfw_wglGetProcAddress _glfw.wgl.GetProcAddress
#define _glfw_wglMakeCurrent _glfw.wgl.opengl32.MakeCurrent #define _glfw_wglMakeCurrent _glfw.wgl.MakeCurrent
#define _glfw_wglShareLists _glfw.wgl.opengl32.ShareLists #define _glfw_wglShareLists _glfw.wgl.ShareLists
#define _GLFW_RECREATION_NOT_NEEDED 0 #define _GLFW_RECREATION_NOT_NEEDED 0
#define _GLFW_RECREATION_REQUIRED 1 #define _GLFW_RECREATION_REQUIRED 1
@ -109,7 +109,22 @@ typedef struct _GLFWcontextWGL
HGLRC context; // Permanent rendering context HGLRC context; // Permanent rendering context
int interval; int interval;
// WGL extensions (context specific) } _GLFWcontextWGL;
// WGL-specific global data
//
typedef struct _GLFWlibraryWGL
{
HINSTANCE instance;
WGLCREATECONTEXT_T CreateContext;
WGLDELETECONTEXT_T DeleteContext;
WGLGETPROCADDRESS_T GetProcAddress;
WGLMAKECURRENT_T MakeCurrent;
WGLSHARELISTS_T ShareLists;
GLFWbool extensionsLoaded;
PFNWGLSWAPINTERVALEXTPROC SwapIntervalEXT; PFNWGLSWAPINTERVALEXTPROC SwapIntervalEXT;
PFNWGLGETPIXELFORMATATTRIBIVARBPROC GetPixelFormatAttribivARB; PFNWGLGETPIXELFORMATATTRIBIVARBPROC GetPixelFormatAttribivARB;
PFNWGLGETEXTENSIONSSTRINGEXTPROC GetExtensionsStringEXT; PFNWGLGETEXTENSIONSSTRINGEXTPROC GetExtensionsStringEXT;
@ -126,22 +141,6 @@ typedef struct _GLFWcontextWGL
GLFWbool ARB_create_context_robustness; GLFWbool ARB_create_context_robustness;
GLFWbool ARB_context_flush_control; GLFWbool ARB_context_flush_control;
} _GLFWcontextWGL;
// WGL-specific global data
//
typedef struct _GLFWlibraryWGL
{
struct {
HINSTANCE instance;
WGLCREATECONTEXT_T CreateContext;
WGLDELETECONTEXT_T DeleteContext;
WGLGETPROCADDRESS_T GetProcAddress;
WGLMAKECURRENT_T MakeCurrent;
WGLSHARELISTS_T ShareLists;
} opengl32;
} _GLFWlibraryWGL; } _GLFWlibraryWGL;
@ -151,7 +150,7 @@ int _glfwCreateContext(_GLFWwindow* window,
const _GLFWctxconfig* ctxconfig, const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig); const _GLFWfbconfig* fbconfig);
void _glfwDestroyContext(_GLFWwindow* window); void _glfwDestroyContext(_GLFWwindow* window);
int _glfwAnalyzeContext(const _GLFWwindow* window, int _glfwAnalyzeContext(_GLFWwindow* window,
const _GLFWctxconfig* ctxconfig, const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig); const _GLFWfbconfig* fbconfig);