diff options
Diffstat (limited to 'vendor/github.com/go-gl/glfw/v3.3/glfw/glfw/src/wgl_context.c')
| -rw-r--r-- | vendor/github.com/go-gl/glfw/v3.3/glfw/glfw/src/wgl_context.c | 798 |
1 files changed, 798 insertions, 0 deletions
diff --git a/vendor/github.com/go-gl/glfw/v3.3/glfw/glfw/src/wgl_context.c b/vendor/github.com/go-gl/glfw/v3.3/glfw/glfw/src/wgl_context.c new file mode 100644 index 0000000..72ad11d --- /dev/null +++ b/vendor/github.com/go-gl/glfw/v3.3/glfw/glfw/src/wgl_context.c @@ -0,0 +1,798 @@ +//======================================================================== +// GLFW 3.3 WGL - www.glfw.org +//------------------------------------------------------------------------ +// Copyright (c) 2002-2006 Marcus Geelnard +// Copyright (c) 2006-2019 Camilla Löwy <elmindreda@glfw.org> +// +// This software is provided 'as-is', without any express or implied +// warranty. In no event will the authors be held liable for any damages +// arising from the use of this software. +// +// Permission is granted to anyone to use this software for any purpose, +// including commercial applications, and to alter it and redistribute it +// freely, subject to the following restrictions: +// +// 1. The origin of this software must not be misrepresented; you must not +// claim that you wrote the original software. If you use this software +// in a product, an acknowledgment in the product documentation would +// be appreciated but is not required. +// +// 2. Altered source versions must be plainly marked as such, and must not +// be misrepresented as being the original software. +// +// 3. This notice may not be removed or altered from any source +// distribution. +// +//======================================================================== +// Please use C89 style variable declarations in this file because VS 2010 +//======================================================================== + +#include "internal.h" + +#include <stdlib.h> +#include <malloc.h> +#include <assert.h> + +// Return the value corresponding to the specified attribute +// +static int findPixelFormatAttribValue(const int* attribs, + int attribCount, + const int* values, + int attrib) +{ + int i; + + for (i = 0; i < attribCount; i++) + { + if (attribs[i] == attrib) + return values[i]; + } + + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Unknown pixel format attribute requested"); + return 0; +} + +#define addAttrib(a) \ +{ \ + assert((size_t) attribCount < sizeof(attribs) / sizeof(attribs[0])); \ + attribs[attribCount++] = a; \ +} +#define findAttribValue(a) \ + findPixelFormatAttribValue(attribs, attribCount, values, a) + +// Return a list of available and usable framebuffer configs +// +static int choosePixelFormat(_GLFWwindow* window, + const _GLFWctxconfig* ctxconfig, + const _GLFWfbconfig* fbconfig) +{ + _GLFWfbconfig* usableConfigs; + const _GLFWfbconfig* closest; + int i, pixelFormat, nativeCount, usableCount = 0, attribCount = 0; + int attribs[40]; + int values[sizeof(attribs) / sizeof(attribs[0])]; + + if (_glfw.wgl.ARB_pixel_format) + { + const int attrib = WGL_NUMBER_PIXEL_FORMATS_ARB; + + if (!wglGetPixelFormatAttribivARB(window->context.wgl.dc, + 1, 0, 1, &attrib, &nativeCount)) + { + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Failed to retrieve pixel format attribute"); + return 0; + } + + addAttrib(WGL_SUPPORT_OPENGL_ARB); + addAttrib(WGL_DRAW_TO_WINDOW_ARB); + addAttrib(WGL_PIXEL_TYPE_ARB); + addAttrib(WGL_ACCELERATION_ARB); + addAttrib(WGL_RED_BITS_ARB); + addAttrib(WGL_RED_SHIFT_ARB); + addAttrib(WGL_GREEN_BITS_ARB); + addAttrib(WGL_GREEN_SHIFT_ARB); + addAttrib(WGL_BLUE_BITS_ARB); + addAttrib(WGL_BLUE_SHIFT_ARB); + addAttrib(WGL_ALPHA_BITS_ARB); + addAttrib(WGL_ALPHA_SHIFT_ARB); + addAttrib(WGL_DEPTH_BITS_ARB); + addAttrib(WGL_STENCIL_BITS_ARB); + addAttrib(WGL_ACCUM_BITS_ARB); + addAttrib(WGL_ACCUM_RED_BITS_ARB); + addAttrib(WGL_ACCUM_GREEN_BITS_ARB); + addAttrib(WGL_ACCUM_BLUE_BITS_ARB); + addAttrib(WGL_ACCUM_ALPHA_BITS_ARB); + addAttrib(WGL_AUX_BUFFERS_ARB); + addAttrib(WGL_STEREO_ARB); + addAttrib(WGL_DOUBLE_BUFFER_ARB); + + if (_glfw.wgl.ARB_multisample) + addAttrib(WGL_SAMPLES_ARB); + + if (ctxconfig->client == GLFW_OPENGL_API) + { + if (_glfw.wgl.ARB_framebuffer_sRGB || _glfw.wgl.EXT_framebuffer_sRGB) + addAttrib(WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB); + } + else + { + if (_glfw.wgl.EXT_colorspace) + addAttrib(WGL_COLORSPACE_EXT); + } + } + else + { + nativeCount = DescribePixelFormat(window->context.wgl.dc, + 1, + sizeof(PIXELFORMATDESCRIPTOR), + NULL); + } + + usableConfigs = calloc(nativeCount, sizeof(_GLFWfbconfig)); + + for (i = 0; i < nativeCount; i++) + { + _GLFWfbconfig* u = usableConfigs + usableCount; + pixelFormat = i + 1; + + if (_glfw.wgl.ARB_pixel_format) + { + // Get pixel format attributes through "modern" extension + + if (!wglGetPixelFormatAttribivARB(window->context.wgl.dc, + pixelFormat, 0, + attribCount, + attribs, values)) + { + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Failed to retrieve pixel format attributes"); + + free(usableConfigs); + return 0; + } + + if (!findAttribValue(WGL_SUPPORT_OPENGL_ARB) || + !findAttribValue(WGL_DRAW_TO_WINDOW_ARB)) + { + continue; + } + + if (findAttribValue(WGL_PIXEL_TYPE_ARB) != WGL_TYPE_RGBA_ARB) + continue; + + if (findAttribValue(WGL_ACCELERATION_ARB) == WGL_NO_ACCELERATION_ARB) + continue; + + if (findAttribValue(WGL_DOUBLE_BUFFER_ARB) != fbconfig->doublebuffer) + continue; + + u->redBits = findAttribValue(WGL_RED_BITS_ARB); + u->greenBits = findAttribValue(WGL_GREEN_BITS_ARB); + u->blueBits = findAttribValue(WGL_BLUE_BITS_ARB); + u->alphaBits = findAttribValue(WGL_ALPHA_BITS_ARB); + + u->depthBits = findAttribValue(WGL_DEPTH_BITS_ARB); + u->stencilBits = findAttribValue(WGL_STENCIL_BITS_ARB); + + u->accumRedBits = findAttribValue(WGL_ACCUM_RED_BITS_ARB); + u->accumGreenBits = findAttribValue(WGL_ACCUM_GREEN_BITS_ARB); + u->accumBlueBits = findAttribValue(WGL_ACCUM_BLUE_BITS_ARB); + u->accumAlphaBits = findAttribValue(WGL_ACCUM_ALPHA_BITS_ARB); + + u->auxBuffers = findAttribValue(WGL_AUX_BUFFERS_ARB); + + if (findAttribValue(WGL_STEREO_ARB)) + u->stereo = GLFW_TRUE; + + if (_glfw.wgl.ARB_multisample) + u->samples = findAttribValue(WGL_SAMPLES_ARB); + + if (ctxconfig->client == GLFW_OPENGL_API) + { + if (_glfw.wgl.ARB_framebuffer_sRGB || + _glfw.wgl.EXT_framebuffer_sRGB) + { + if (findAttribValue(WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB)) + u->sRGB = GLFW_TRUE; + } + } + else + { + if (_glfw.wgl.EXT_colorspace) + { + if (findAttribValue(WGL_COLORSPACE_EXT) == WGL_COLORSPACE_SRGB_EXT) + u->sRGB = GLFW_TRUE; + } + } + } + else + { + // Get pixel format attributes through legacy PFDs + + PIXELFORMATDESCRIPTOR pfd; + + if (!DescribePixelFormat(window->context.wgl.dc, + pixelFormat, + sizeof(PIXELFORMATDESCRIPTOR), + &pfd)) + { + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Failed to describe pixel format"); + + free(usableConfigs); + return 0; + } + + if (!(pfd.dwFlags & PFD_DRAW_TO_WINDOW) || + !(pfd.dwFlags & PFD_SUPPORT_OPENGL)) + { + continue; + } + + if (!(pfd.dwFlags & PFD_GENERIC_ACCELERATED) && + (pfd.dwFlags & PFD_GENERIC_FORMAT)) + { + continue; + } + + if (pfd.iPixelType != PFD_TYPE_RGBA) + continue; + + if (!!(pfd.dwFlags & PFD_DOUBLEBUFFER) != fbconfig->doublebuffer) + continue; + + u->redBits = pfd.cRedBits; + u->greenBits = pfd.cGreenBits; + u->blueBits = pfd.cBlueBits; + u->alphaBits = pfd.cAlphaBits; + + u->depthBits = pfd.cDepthBits; + u->stencilBits = pfd.cStencilBits; + + u->accumRedBits = pfd.cAccumRedBits; + u->accumGreenBits = pfd.cAccumGreenBits; + u->accumBlueBits = pfd.cAccumBlueBits; + u->accumAlphaBits = pfd.cAccumAlphaBits; + + u->auxBuffers = pfd.cAuxBuffers; + + if (pfd.dwFlags & PFD_STEREO) + u->stereo = GLFW_TRUE; + } + + u->handle = pixelFormat; + usableCount++; + } + + if (!usableCount) + { + _glfwInputError(GLFW_API_UNAVAILABLE, + "WGL: The driver does not appear to support OpenGL"); + + free(usableConfigs); + return 0; + } + + closest = _glfwChooseFBConfig(fbconfig, usableConfigs, usableCount); + if (!closest) + { + _glfwInputError(GLFW_FORMAT_UNAVAILABLE, + "WGL: Failed to find a suitable pixel format"); + + free(usableConfigs); + return 0; + } + + pixelFormat = (int) closest->handle; + free(usableConfigs); + + return pixelFormat; +} + +#undef addAttrib +#undef findAttribValue + +static void makeContextCurrentWGL(_GLFWwindow* window) +{ + if (window) + { + if (wglMakeCurrent(window->context.wgl.dc, window->context.wgl.handle)) + _glfwPlatformSetTls(&_glfw.contextSlot, window); + else + { + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Failed to make context current"); + _glfwPlatformSetTls(&_glfw.contextSlot, NULL); + } + } + else + { + if (!wglMakeCurrent(NULL, NULL)) + { + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Failed to clear current context"); + } + + _glfwPlatformSetTls(&_glfw.contextSlot, NULL); + } +} + +static void swapBuffersWGL(_GLFWwindow* window) +{ + if (!window->monitor) + { + if (IsWindowsVistaOrGreater()) + { + // DWM Composition is always enabled on Win8+ + BOOL enabled = IsWindows8OrGreater(); + + // HACK: Use DwmFlush when desktop composition is enabled + if (enabled || + (SUCCEEDED(DwmIsCompositionEnabled(&enabled)) && enabled)) + { + int count = abs(window->context.wgl.interval); + while (count--) + DwmFlush(); + } + } + } + + SwapBuffers(window->context.wgl.dc); +} + +static void swapIntervalWGL(int interval) +{ + _GLFWwindow* window = _glfwPlatformGetTls(&_glfw.contextSlot); + + window->context.wgl.interval = interval; + + if (!window->monitor) + { + if (IsWindowsVistaOrGreater()) + { + // DWM Composition is always enabled on Win8+ + BOOL enabled = IsWindows8OrGreater(); + + // HACK: Disable WGL swap interval when desktop composition is enabled to + // avoid interfering with DWM vsync + if (enabled || + (SUCCEEDED(DwmIsCompositionEnabled(&enabled)) && enabled)) + interval = 0; + } + } + + if (_glfw.wgl.EXT_swap_control) + wglSwapIntervalEXT(interval); +} + +static int extensionSupportedWGL(const char* extension) +{ + const char* extensions = NULL; + + if (_glfw.wgl.GetExtensionsStringARB) + extensions = wglGetExtensionsStringARB(wglGetCurrentDC()); + else if (_glfw.wgl.GetExtensionsStringEXT) + extensions = wglGetExtensionsStringEXT(); + + if (!extensions) + return GLFW_FALSE; + + return _glfwStringInExtensionString(extension, extensions); +} + +static GLFWglproc getProcAddressWGL(const char* procname) +{ + const GLFWglproc proc = (GLFWglproc) wglGetProcAddress(procname); + if (proc) + return proc; + + return (GLFWglproc) GetProcAddress(_glfw.wgl.instance, procname); +} + +static void destroyContextWGL(_GLFWwindow* window) +{ + if (window->context.wgl.handle) + { + wglDeleteContext(window->context.wgl.handle); + window->context.wgl.handle = NULL; + } +} + + +////////////////////////////////////////////////////////////////////////// +////// GLFW internal API ////// +////////////////////////////////////////////////////////////////////////// + +// Initialize WGL +// +GLFWbool _glfwInitWGL(void) +{ + PIXELFORMATDESCRIPTOR pfd; + HGLRC prc, rc; + HDC pdc, dc; + + if (_glfw.wgl.instance) + return GLFW_TRUE; + + _glfw.wgl.instance = LoadLibraryA("opengl32.dll"); + if (!_glfw.wgl.instance) + { + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Failed to load opengl32.dll"); + return GLFW_FALSE; + } + + _glfw.wgl.CreateContext = (PFN_wglCreateContext) + GetProcAddress(_glfw.wgl.instance, "wglCreateContext"); + _glfw.wgl.DeleteContext = (PFN_wglDeleteContext) + GetProcAddress(_glfw.wgl.instance, "wglDeleteContext"); + _glfw.wgl.GetProcAddress = (PFN_wglGetProcAddress) + GetProcAddress(_glfw.wgl.instance, "wglGetProcAddress"); + _glfw.wgl.GetCurrentDC = (PFN_wglGetCurrentDC) + GetProcAddress(_glfw.wgl.instance, "wglGetCurrentDC"); + _glfw.wgl.GetCurrentContext = (PFN_wglGetCurrentContext) + GetProcAddress(_glfw.wgl.instance, "wglGetCurrentContext"); + _glfw.wgl.MakeCurrent = (PFN_wglMakeCurrent) + GetProcAddress(_glfw.wgl.instance, "wglMakeCurrent"); + _glfw.wgl.ShareLists = (PFN_wglShareLists) + GetProcAddress(_glfw.wgl.instance, "wglShareLists"); + + // NOTE: A dummy context has to be created for opengl32.dll to load the + // OpenGL ICD, from which we can then query WGL extensions + // NOTE: This code will accept the Microsoft GDI ICD; accelerated context + // creation failure occurs during manual pixel format enumeration + + dc = GetDC(_glfw.win32.helperWindowHandle); + + ZeroMemory(&pfd, sizeof(pfd)); + pfd.nSize = sizeof(pfd); + pfd.nVersion = 1; + pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER; + pfd.iPixelType = PFD_TYPE_RGBA; + pfd.cColorBits = 24; + + if (!SetPixelFormat(dc, ChoosePixelFormat(dc, &pfd), &pfd)) + { + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Failed to set pixel format for dummy context"); + return GLFW_FALSE; + } + + rc = wglCreateContext(dc); + if (!rc) + { + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Failed to create dummy context"); + return GLFW_FALSE; + } + + pdc = wglGetCurrentDC(); + prc = wglGetCurrentContext(); + + if (!wglMakeCurrent(dc, rc)) + { + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Failed to make dummy context current"); + wglMakeCurrent(pdc, prc); + wglDeleteContext(rc); + return GLFW_FALSE; + } + + // NOTE: Functions must be loaded first as they're needed to retrieve the + // extension string that tells us whether the functions are supported + _glfw.wgl.GetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC) + wglGetProcAddress("wglGetExtensionsStringEXT"); + _glfw.wgl.GetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC) + wglGetProcAddress("wglGetExtensionsStringARB"); + _glfw.wgl.CreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) + wglGetProcAddress("wglCreateContextAttribsARB"); + _glfw.wgl.SwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC) + wglGetProcAddress("wglSwapIntervalEXT"); + _glfw.wgl.GetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC) + wglGetProcAddress("wglGetPixelFormatAttribivARB"); + + // NOTE: WGL_ARB_extensions_string and WGL_EXT_extensions_string are not + // checked below as we are already using them + _glfw.wgl.ARB_multisample = + extensionSupportedWGL("WGL_ARB_multisample"); + _glfw.wgl.ARB_framebuffer_sRGB = + extensionSupportedWGL("WGL_ARB_framebuffer_sRGB"); + _glfw.wgl.EXT_framebuffer_sRGB = + extensionSupportedWGL("WGL_EXT_framebuffer_sRGB"); + _glfw.wgl.ARB_create_context = + extensionSupportedWGL("WGL_ARB_create_context"); + _glfw.wgl.ARB_create_context_profile = + extensionSupportedWGL("WGL_ARB_create_context_profile"); + _glfw.wgl.EXT_create_context_es2_profile = + extensionSupportedWGL("WGL_EXT_create_context_es2_profile"); + _glfw.wgl.ARB_create_context_robustness = + extensionSupportedWGL("WGL_ARB_create_context_robustness"); + _glfw.wgl.ARB_create_context_no_error = + extensionSupportedWGL("WGL_ARB_create_context_no_error"); + _glfw.wgl.EXT_swap_control = + extensionSupportedWGL("WGL_EXT_swap_control"); + _glfw.wgl.EXT_colorspace = + extensionSupportedWGL("WGL_EXT_colorspace"); + _glfw.wgl.ARB_pixel_format = + extensionSupportedWGL("WGL_ARB_pixel_format"); + _glfw.wgl.ARB_context_flush_control = + extensionSupportedWGL("WGL_ARB_context_flush_control"); + + wglMakeCurrent(pdc, prc); + wglDeleteContext(rc); + return GLFW_TRUE; +} + +// Terminate WGL +// +void _glfwTerminateWGL(void) +{ + if (_glfw.wgl.instance) + FreeLibrary(_glfw.wgl.instance); +} + +#define setAttrib(a, v) \ +{ \ + assert(((size_t) index + 1) < sizeof(attribs) / sizeof(attribs[0])); \ + attribs[index++] = a; \ + attribs[index++] = v; \ +} + +// Create the OpenGL or OpenGL ES context +// +GLFWbool _glfwCreateContextWGL(_GLFWwindow* window, + const _GLFWctxconfig* ctxconfig, + const _GLFWfbconfig* fbconfig) +{ + int attribs[40]; + int pixelFormat; + PIXELFORMATDESCRIPTOR pfd; + HGLRC share = NULL; + + if (ctxconfig->share) + share = ctxconfig->share->context.wgl.handle; + + window->context.wgl.dc = GetDC(window->win32.handle); + if (!window->context.wgl.dc) + { + _glfwInputError(GLFW_PLATFORM_ERROR, + "WGL: Failed to retrieve DC for window"); + return GLFW_FALSE; + } + + pixelFormat = choosePixelFormat(window, ctxconfig, fbconfig); + if (!pixelFormat) + return GLFW_FALSE; + + if (!DescribePixelFormat(window->context.wgl.dc, + pixelFormat, sizeof(pfd), &pfd)) + { + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Failed to retrieve PFD for selected pixel format"); + return GLFW_FALSE; + } + + if (!SetPixelFormat(window->context.wgl.dc, pixelFormat, &pfd)) + { + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Failed to set selected pixel format"); + return GLFW_FALSE; + } + + if (ctxconfig->client == GLFW_OPENGL_API) + { + if (ctxconfig->forward) + { + if (!_glfw.wgl.ARB_create_context) + { + _glfwInputError(GLFW_VERSION_UNAVAILABLE, + "WGL: A forward compatible OpenGL context requested but WGL_ARB_create_context is unavailable"); + return GLFW_FALSE; + } + } + + if (ctxconfig->profile) + { + if (!_glfw.wgl.ARB_create_context_profile) + { + _glfwInputError(GLFW_VERSION_UNAVAILABLE, + "WGL: OpenGL profile requested but WGL_ARB_create_context_profile is unavailable"); + return GLFW_FALSE; + } + } + } + else + { + if (!_glfw.wgl.ARB_create_context || + !_glfw.wgl.ARB_create_context_profile || + !_glfw.wgl.EXT_create_context_es2_profile) + { + _glfwInputError(GLFW_API_UNAVAILABLE, + "WGL: OpenGL ES requested but WGL_ARB_create_context_es2_profile is unavailable"); + return GLFW_FALSE; + } + } + + if (_glfw.wgl.ARB_create_context) + { + int index = 0, mask = 0, flags = 0; + + if (ctxconfig->client == GLFW_OPENGL_API) + { + if (ctxconfig->forward) + flags |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB; + + if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE) + mask |= WGL_CONTEXT_CORE_PROFILE_BIT_ARB; + else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE) + mask |= WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; + } + else + mask |= WGL_CONTEXT_ES2_PROFILE_BIT_EXT; + + if (ctxconfig->debug) + flags |= WGL_CONTEXT_DEBUG_BIT_ARB; + + if (ctxconfig->robustness) + { + if (_glfw.wgl.ARB_create_context_robustness) + { + if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION) + { + setAttrib(WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB, + WGL_NO_RESET_NOTIFICATION_ARB); + } + else if (ctxconfig->robustness == GLFW_LOSE_CONTEXT_ON_RESET) + { + setAttrib(WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB, + WGL_LOSE_CONTEXT_ON_RESET_ARB); + } + + flags |= WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB; + } + } + + if (ctxconfig->release) + { + if (_glfw.wgl.ARB_context_flush_control) + { + if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_NONE) + { + setAttrib(WGL_CONTEXT_RELEASE_BEHAVIOR_ARB, + WGL_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB); + } + else if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_FLUSH) + { + setAttrib(WGL_CONTEXT_RELEASE_BEHAVIOR_ARB, + WGL_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB); + } + } + } + + if (ctxconfig->noerror) + { + if (_glfw.wgl.ARB_create_context_no_error) + setAttrib(WGL_CONTEXT_OPENGL_NO_ERROR_ARB, GLFW_TRUE); + } + + // NOTE: Only request an explicitly versioned context when necessary, as + // explicitly requesting version 1.0 does not always return the + // highest version supported by the driver + if (ctxconfig->major != 1 || ctxconfig->minor != 0) + { + setAttrib(WGL_CONTEXT_MAJOR_VERSION_ARB, ctxconfig->major); + setAttrib(WGL_CONTEXT_MINOR_VERSION_ARB, ctxconfig->minor); + } + + if (flags) + setAttrib(WGL_CONTEXT_FLAGS_ARB, flags); + + if (mask) + setAttrib(WGL_CONTEXT_PROFILE_MASK_ARB, mask); + + setAttrib(0, 0); + + window->context.wgl.handle = + wglCreateContextAttribsARB(window->context.wgl.dc, share, attribs); + if (!window->context.wgl.handle) + { + const DWORD error = GetLastError(); + + if (error == (0xc0070000 | ERROR_INVALID_VERSION_ARB)) + { + if (ctxconfig->client == GLFW_OPENGL_API) + { + _glfwInputError(GLFW_VERSION_UNAVAILABLE, + "WGL: Driver does not support OpenGL version %i.%i", + ctxconfig->major, + ctxconfig->minor); + } + else + { + _glfwInputError(GLFW_VERSION_UNAVAILABLE, + "WGL: Driver does not support OpenGL ES version %i.%i", + ctxconfig->major, + ctxconfig->minor); + } + } + else if (error == (0xc0070000 | ERROR_INVALID_PROFILE_ARB)) + { + _glfwInputError(GLFW_VERSION_UNAVAILABLE, + "WGL: Driver does not support the requested OpenGL profile"); + } + else if (error == (0xc0070000 | ERROR_INCOMPATIBLE_DEVICE_CONTEXTS_ARB)) + { + _glfwInputError(GLFW_INVALID_VALUE, + "WGL: The share context is not compatible with the requested context"); + } + else + { + if (ctxconfig->client == GLFW_OPENGL_API) + { + _glfwInputError(GLFW_VERSION_UNAVAILABLE, + "WGL: Failed to create OpenGL context"); + } + else + { + _glfwInputError(GLFW_VERSION_UNAVAILABLE, + "WGL: Failed to create OpenGL ES context"); + } + } + + return GLFW_FALSE; + } + } + else + { + window->context.wgl.handle = wglCreateContext(window->context.wgl.dc); + if (!window->context.wgl.handle) + { + _glfwInputErrorWin32(GLFW_VERSION_UNAVAILABLE, + "WGL: Failed to create OpenGL context"); + return GLFW_FALSE; + } + + if (share) + { + if (!wglShareLists(share, window->context.wgl.handle)) + { + _glfwInputErrorWin32(GLFW_PLATFORM_ERROR, + "WGL: Failed to enable sharing with specified OpenGL context"); + return GLFW_FALSE; + } + } + } + + window->context.makeCurrent = makeContextCurrentWGL; + window->context.swapBuffers = swapBuffersWGL; + window->context.swapInterval = swapIntervalWGL; + window->context.extensionSupported = extensionSupportedWGL; + window->context.getProcAddress = getProcAddressWGL; + window->context.destroy = destroyContextWGL; + + return GLFW_TRUE; +} + +#undef setAttrib + + +////////////////////////////////////////////////////////////////////////// +////// GLFW native API ////// +////////////////////////////////////////////////////////////////////////// + +GLFWAPI HGLRC glfwGetWGLContext(GLFWwindow* handle) +{ + _GLFWwindow* window = (_GLFWwindow*) handle; + _GLFW_REQUIRE_INIT_OR_RETURN(NULL); + + if (window->context.source != GLFW_NATIVE_CONTEXT_API) + { + _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL); + return NULL; + } + + return window->context.wgl.handle; +} + |