From fc74a5533e656b35d75f58f84760bf8e9f48a016 Mon Sep 17 00:00:00 2001 From: Camilla Berglund Date: Tue, 31 Jul 2012 22:48:28 +0200 Subject: [PATCH] Moved WGL context logic into OpenGL module. --- src/win32_opengl.c | 582 +++++++++++++++++++++++++++++++++++++++++++ src/win32_platform.h | 6 + src/win32_window.c | 569 +----------------------------------------- 3 files changed, 594 insertions(+), 563 deletions(-) diff --git a/src/win32_opengl.c b/src/win32_opengl.c index 5e94d7da..cc795e53 100644 --- a/src/win32_opengl.c +++ b/src/win32_opengl.c @@ -31,6 +31,588 @@ #include "internal.h" +//======================================================================== +// Initialize WGL-specific extensions +// This function is called once before initial context creation, i.e. before +// any WGL extensions could be present. This is done in order to have both +// extension variable clearing and loading in the same place, hopefully +// decreasing the possibility of forgetting to add one without the other. +//======================================================================== + +static void initWGLExtensions(_GLFWwindow* window) +{ + // This needs to include every function pointer loaded below + window->WGL.SwapIntervalEXT = NULL; + window->WGL.GetPixelFormatAttribivARB = NULL; + window->WGL.GetExtensionsStringARB = NULL; + window->WGL.GetExtensionsStringEXT = NULL; + window->WGL.CreateContextAttribsARB = NULL; + + // This needs to include every extension used below except for + // WGL_ARB_extensions_string and WGL_EXT_extensions_string + window->WGL.ARB_multisample = GL_FALSE; + window->WGL.ARB_create_context = GL_FALSE; + window->WGL.ARB_create_context_profile = GL_FALSE; + window->WGL.EXT_create_context_es2_profile = GL_FALSE; + window->WGL.ARB_create_context_robustness = GL_FALSE; + window->WGL.EXT_swap_control = GL_FALSE; + window->WGL.ARB_pixel_format = GL_FALSE; + + window->WGL.GetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC) + wglGetProcAddress("wglGetExtensionsStringEXT"); + if (!window->WGL.GetExtensionsStringEXT) + { + window->WGL.GetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC) + wglGetProcAddress("wglGetExtensionsStringARB"); + if (!window->WGL.GetExtensionsStringARB) + return; + } + + if (_glfwPlatformExtensionSupported("WGL_ARB_multisample")) + window->WGL.ARB_multisample = GL_TRUE; + + if (_glfwPlatformExtensionSupported("WGL_ARB_create_context")) + { + window->WGL.CreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) + wglGetProcAddress("wglCreateContextAttribsARB"); + + if (window->WGL.CreateContextAttribsARB) + window->WGL.ARB_create_context = GL_TRUE; + } + + if (window->WGL.ARB_create_context) + { + if (_glfwPlatformExtensionSupported("WGL_ARB_create_context_profile")) + window->WGL.ARB_create_context_profile = GL_TRUE; + } + + if (window->WGL.ARB_create_context && + window->WGL.ARB_create_context_profile) + { + if (_glfwPlatformExtensionSupported("WGL_EXT_create_context_es2_profile")) + window->WGL.EXT_create_context_es2_profile = GL_TRUE; + } + + if (window->WGL.ARB_create_context) + { + if (_glfwPlatformExtensionSupported("WGL_ARB_create_context_robustness")) + window->WGL.ARB_create_context_robustness = GL_TRUE; + } + + if (_glfwPlatformExtensionSupported("WGL_EXT_swap_control")) + { + window->WGL.SwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC) + wglGetProcAddress("wglSwapIntervalEXT"); + + if (window->WGL.SwapIntervalEXT) + window->WGL.EXT_swap_control = GL_TRUE; + } + + if (_glfwPlatformExtensionSupported("WGL_ARB_pixel_format")) + { + window->WGL.GetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC) + wglGetProcAddress("wglGetPixelFormatAttribivARB"); + + if (window->WGL.GetPixelFormatAttribivARB) + window->WGL.ARB_pixel_format = GL_TRUE; + } +} + + +//======================================================================== +// Returns the specified attribute of the specified pixel format +// NOTE: Do not call this unless we have found WGL_ARB_pixel_format +//======================================================================== + +static int getPixelFormatAttrib(_GLFWwindow* window, int pixelFormat, int attrib) +{ + int value = 0; + + if (!window->WGL.GetPixelFormatAttribivARB(window->WGL.DC, + pixelFormat, + 0, 1, &attrib, &value)) + { + // NOTE: We should probably handle this error somehow + return 0; + } + + return value; +} + + +//======================================================================== +// Return a list of available and usable framebuffer configs +//======================================================================== + +static _GLFWfbconfig* getFBConfigs(_GLFWwindow* window, unsigned int* found) +{ + _GLFWfbconfig* fbconfigs; + PIXELFORMATDESCRIPTOR pfd; + int i, available; + + *found = 0; + + if (window->WGL.ARB_pixel_format) + { + available = getPixelFormatAttrib(window, + 1, + WGL_NUMBER_PIXEL_FORMATS_ARB); + } + else + { + available = DescribePixelFormat(window->WGL.DC, + 1, + sizeof(PIXELFORMATDESCRIPTOR), + NULL); + } + + if (!available) + { + _glfwSetError(GLFW_OPENGL_UNAVAILABLE, "Win32/WGL: No pixel formats found"); + return NULL; + } + + fbconfigs = (_GLFWfbconfig*) malloc(sizeof(_GLFWfbconfig) * available); + if (!fbconfigs) + { + _glfwSetError(GLFW_OUT_OF_MEMORY, + "Win32/WGL: Failed to allocate _GLFWfbconfig array"); + return NULL; + } + + for (i = 1; i <= available; i++) + { + _GLFWfbconfig* f = fbconfigs + *found; + + if (window->WGL.ARB_pixel_format) + { + // Get pixel format attributes through WGL_ARB_pixel_format + if (!getPixelFormatAttrib(window, i, WGL_SUPPORT_OPENGL_ARB) || + !getPixelFormatAttrib(window, i, WGL_DRAW_TO_WINDOW_ARB) || + !getPixelFormatAttrib(window, i, WGL_DOUBLE_BUFFER_ARB)) + { + continue; + } + + if (getPixelFormatAttrib(window, i, WGL_PIXEL_TYPE_ARB) != + WGL_TYPE_RGBA_ARB) + { + continue; + } + + if (getPixelFormatAttrib(window, i, WGL_ACCELERATION_ARB) == + WGL_NO_ACCELERATION_ARB) + { + continue; + } + + f->redBits = getPixelFormatAttrib(window, i, WGL_RED_BITS_ARB); + f->greenBits = getPixelFormatAttrib(window, i, WGL_GREEN_BITS_ARB); + f->blueBits = getPixelFormatAttrib(window, i, WGL_BLUE_BITS_ARB); + f->alphaBits = getPixelFormatAttrib(window, i, WGL_ALPHA_BITS_ARB); + + f->depthBits = getPixelFormatAttrib(window, i, WGL_DEPTH_BITS_ARB); + f->stencilBits = getPixelFormatAttrib(window, i, WGL_STENCIL_BITS_ARB); + + f->accumRedBits = getPixelFormatAttrib(window, i, WGL_ACCUM_RED_BITS_ARB); + f->accumGreenBits = getPixelFormatAttrib(window, i, WGL_ACCUM_GREEN_BITS_ARB); + f->accumBlueBits = getPixelFormatAttrib(window, i, WGL_ACCUM_BLUE_BITS_ARB); + f->accumAlphaBits = getPixelFormatAttrib(window, i, WGL_ACCUM_ALPHA_BITS_ARB); + + f->auxBuffers = getPixelFormatAttrib(window, i, WGL_AUX_BUFFERS_ARB); + f->stereo = getPixelFormatAttrib(window, i, WGL_STEREO_ARB); + + if (window->WGL.ARB_multisample) + f->samples = getPixelFormatAttrib(window, i, WGL_SAMPLES_ARB); + else + f->samples = 0; + } + else + { + // Get pixel format attributes through old-fashioned PFDs + + if (!DescribePixelFormat(window->WGL.DC, + i, + sizeof(PIXELFORMATDESCRIPTOR), + &pfd)) + { + continue; + } + + if (!(pfd.dwFlags & PFD_DRAW_TO_WINDOW) || + !(pfd.dwFlags & PFD_SUPPORT_OPENGL) || + !(pfd.dwFlags & PFD_DOUBLEBUFFER)) + { + continue; + } + + if (!(pfd.dwFlags & PFD_GENERIC_ACCELERATED) && + (pfd.dwFlags & PFD_GENERIC_FORMAT)) + { + continue; + } + + if (pfd.iPixelType != PFD_TYPE_RGBA) + continue; + + f->redBits = pfd.cRedBits; + f->greenBits = pfd.cGreenBits; + f->blueBits = pfd.cBlueBits; + f->alphaBits = pfd.cAlphaBits; + + f->depthBits = pfd.cDepthBits; + f->stencilBits = pfd.cStencilBits; + + f->accumRedBits = pfd.cAccumRedBits; + f->accumGreenBits = pfd.cAccumGreenBits; + f->accumBlueBits = pfd.cAccumBlueBits; + f->accumAlphaBits = pfd.cAccumAlphaBits; + + f->auxBuffers = pfd.cAuxBuffers; + f->stereo = (pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE; + + // PFD pixel formats do not support FSAA + f->samples = 0; + } + + f->platformID = i; + + (*found)++; + } + + if (*found == 0) + { + free(fbconfigs); + return NULL; + } + + return fbconfigs; +} + + +//======================================================================== +// Read back framebuffer parameters from the context +//======================================================================== + +static void refreshContextParams(_GLFWwindow* window, int pixelFormat) +{ + PIXELFORMATDESCRIPTOR pfd; + + if (window->WGL.ARB_pixel_format) + { + if (getPixelFormatAttrib(window, pixelFormat, WGL_ACCELERATION_ARB) != + WGL_NO_ACCELERATION_ARB) + { + window->accelerated = GL_TRUE; + } + else + window->accelerated = GL_FALSE; + + window->redBits = + getPixelFormatAttrib(window, pixelFormat, WGL_RED_BITS_ARB); + window->greenBits = + getPixelFormatAttrib(window, pixelFormat, WGL_GREEN_BITS_ARB); + window->blueBits = + getPixelFormatAttrib(window, pixelFormat, WGL_BLUE_BITS_ARB); + + window->alphaBits = + getPixelFormatAttrib(window, pixelFormat, WGL_ALPHA_BITS_ARB); + window->depthBits = + getPixelFormatAttrib(window, pixelFormat, WGL_DEPTH_BITS_ARB); + window->stencilBits = + getPixelFormatAttrib(window, pixelFormat, WGL_STENCIL_BITS_ARB); + + window->accumRedBits = + getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_RED_BITS_ARB); + window->accumGreenBits = + getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_GREEN_BITS_ARB); + window->accumBlueBits = + getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_BLUE_BITS_ARB); + window->accumAlphaBits = + getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_ALPHA_BITS_ARB); + + window->auxBuffers = + getPixelFormatAttrib(window, pixelFormat, WGL_AUX_BUFFERS_ARB); + window->stereo = + getPixelFormatAttrib(window, pixelFormat, WGL_STEREO_ARB) ? GL_TRUE : GL_FALSE; + + if (window->WGL.ARB_multisample) + { + window->samples = getPixelFormatAttrib(window, pixelFormat, WGL_SAMPLES_ARB); + + // We force 1 to zero here because all the other APIs say zero when + // they really mean 1 + if (window->samples == 1) + window->samples = 0; + } + else + window->samples = 0; + } + else + { + DescribePixelFormat(window->WGL.DC, pixelFormat, + sizeof(PIXELFORMATDESCRIPTOR), &pfd); + + // Is current OpenGL context accelerated? + window->accelerated = (pfd.dwFlags & PFD_GENERIC_ACCELERATED) || + !(pfd.dwFlags & PFD_GENERIC_FORMAT) ? 1 : 0; + + // "Standard" window parameters + window->redBits = pfd.cRedBits; + window->greenBits = pfd.cGreenBits; + window->blueBits = pfd.cBlueBits; + window->alphaBits = pfd.cAlphaBits; + window->depthBits = pfd.cDepthBits; + window->stencilBits = pfd.cStencilBits; + window->accumRedBits = pfd.cAccumRedBits; + window->accumGreenBits = pfd.cAccumGreenBits; + window->accumBlueBits = pfd.cAccumBlueBits; + window->accumAlphaBits = pfd.cAccumAlphaBits; + window->auxBuffers = pfd.cAuxBuffers; + window->stereo = (pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE; + + // If we don't have WGL_ARB_pixel_format then we can't have created a + // multisampling context, so it's safe to hardcode zero here + window->samples = 0; + } +} + + +//======================================================================== +// Creates an OpenGL context on the specified device context +//======================================================================== + +static GLboolean createContext(_GLFWwindow* window, + const _GLFWwndconfig* wndconfig, + int pixelFormat) +{ + PIXELFORMATDESCRIPTOR pfd; + int i = 0, attribs[40]; + HGLRC share = NULL; + + if (wndconfig->share) + share = wndconfig->share->WGL.context; + + if (!DescribePixelFormat(window->WGL.DC, pixelFormat, sizeof(pfd), &pfd)) + { + _glfwSetError(GLFW_OPENGL_UNAVAILABLE, + "Win32/WGL: Failed to retrieve PFD for selected pixel format"); + return GL_FALSE; + } + + if (!SetPixelFormat(window->WGL.DC, pixelFormat, &pfd)) + { + _glfwSetError(GLFW_OPENGL_UNAVAILABLE, + "Win32/WGL: Failed to set selected pixel format"); + return GL_FALSE; + } + + if (window->WGL.ARB_create_context) + { + // Use the newer wglCreateContextAttribsARB creation method + + if (wndconfig->glMajor != 1 || wndconfig->glMinor != 0) + { + // Request an explicitly versioned context + + attribs[i++] = WGL_CONTEXT_MAJOR_VERSION_ARB; + attribs[i++] = wndconfig->glMajor; + attribs[i++] = WGL_CONTEXT_MINOR_VERSION_ARB; + attribs[i++] = wndconfig->glMinor; + } + + if (wndconfig->glForward || wndconfig->glDebug || wndconfig->glRobustness) + { + int flags = 0; + + if (wndconfig->glForward) + flags |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB; + + if (wndconfig->glDebug) + flags |= WGL_CONTEXT_DEBUG_BIT_ARB; + + if (wndconfig->glRobustness) + flags |= WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB; + + attribs[i++] = WGL_CONTEXT_FLAGS_ARB; + attribs[i++] = flags; + } + + if (wndconfig->glProfile) + { + int flags = 0; + + if (!window->WGL.ARB_create_context_profile) + { + _glfwSetError(GLFW_VERSION_UNAVAILABLE, + "Win32/WGL: OpenGL profile requested but " + "WGL_ARB_create_context_profile is unavailable"); + return GL_FALSE; + } + + if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE && + !window->WGL.EXT_create_context_es2_profile) + { + _glfwSetError(GLFW_VERSION_UNAVAILABLE, + "Win32/WGL: OpenGL ES 2.x profile requested but " + "WGL_EXT_create_context_es2_profile is unavailable"); + return GL_FALSE; + } + + if (wndconfig->glProfile == GLFW_OPENGL_CORE_PROFILE) + flags = WGL_CONTEXT_CORE_PROFILE_BIT_ARB; + else if (wndconfig->glProfile == GLFW_OPENGL_COMPAT_PROFILE) + flags = WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; + else if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE) + flags = WGL_CONTEXT_ES2_PROFILE_BIT_EXT; + + attribs[i++] = WGL_CONTEXT_PROFILE_MASK_ARB; + attribs[i++] = flags; + } + + if (wndconfig->glRobustness) + { + int strategy; + + if (!window->WGL.ARB_create_context_robustness) + { + _glfwSetError(GLFW_VERSION_UNAVAILABLE, + "Win32/WGL: An OpenGL robustness strategy was " + "requested but WGL_ARB_create_context_robustness " + "is unavailable"); + return GL_FALSE; + } + + if (wndconfig->glRobustness == GLFW_OPENGL_NO_RESET_NOTIFICATION) + strategy = WGL_NO_RESET_NOTIFICATION_ARB; + else if (wndconfig->glRobustness == GLFW_OPENGL_LOSE_CONTEXT_ON_RESET) + strategy = WGL_LOSE_CONTEXT_ON_RESET_ARB; + + attribs[i++] = WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB; + attribs[i++] = strategy; + } + + attribs[i++] = 0; + + window->WGL.context = window->WGL.CreateContextAttribsARB(window->WGL.DC, + share, + attribs); + if (!window->WGL.context) + { + _glfwSetError(GLFW_VERSION_UNAVAILABLE, + "Win32/WGL: Failed to create OpenGL context"); + return GL_FALSE; + } + } + else + { + window->WGL.context = wglCreateContext(window->WGL.DC); + if (!window->WGL.context) + { + _glfwSetError(GLFW_PLATFORM_ERROR, + "Win32/WGL: Failed to create OpenGL context"); + return GL_FALSE; + } + + if (share) + { + if (!wglShareLists(share, window->WGL.context)) + { + _glfwSetError(GLFW_PLATFORM_ERROR, + "Win32/WGL: Failed to enable sharing with " + "specified OpenGL context"); + return GL_FALSE; + } + } + } + + glfwMakeContextCurrent(window); + initWGLExtensions(window); + refreshContextParams(window, pixelFormat); + + return GL_TRUE; +} + + +////////////////////////////////////////////////////////////////////////// +////// GLFW internal API ////// +////////////////////////////////////////////////////////////////////////// + +//======================================================================== +// Prepare for creation of the OpenGL context +//======================================================================== + +int _glfwCreateContext(_GLFWwindow* window, + const _GLFWwndconfig* wndconfig, + const _GLFWfbconfig* fbconfig) +{ + _GLFWfbconfig closest; + + window->WGL.DC = GetDC(window->Win32.handle); + if (!window->WGL.DC) + { + _glfwSetError(GLFW_PLATFORM_ERROR, + "Win32/WGL: Failed to retrieve DC for window"); + return GL_FALSE; + } + + // Choose the best available fbconfig + { + unsigned int fbcount; + _GLFWfbconfig* fbconfigs; + const _GLFWfbconfig* result; + + fbconfigs = getFBConfigs(window, &fbcount); + if (!fbconfigs) + { + _glfwSetError(GLFW_PLATFORM_ERROR, + "Win32/WGL: No usable pixel formats found"); + return GL_FALSE; + } + + result = _glfwChooseFBConfig(fbconfig, fbconfigs, fbcount); + if (!result) + { + _glfwSetError(GLFW_PLATFORM_ERROR, + "Win32/WGL: No pixel format matched the criteria"); + + free(fbconfigs); + return GL_FALSE; + } + + closest = *result; + free(fbconfigs); + } + + return createContext(window, wndconfig, (int) closest.platformID); +} + + +//======================================================================== +// Destroy the OpenGL context +//======================================================================== + +void _glfwDestroyContext(_GLFWwindow* window) +{ + // This is duplicated from glfwCloseWindow + // TODO: Stop duplicating code + if (window == _glfwLibrary.currentWindow) + glfwMakeContextCurrent(NULL); + + if (window->WGL.context) + { + wglDeleteContext(window->WGL.context); + window->WGL.context = NULL; + } + + if (window->WGL.DC) + { + ReleaseDC(window->Win32.handle, window->WGL.DC); + window->WGL.DC = NULL; + } +} + + ////////////////////////////////////////////////////////////////////////// ////// GLFW platform API ////// ////////////////////////////////////////////////////////////////////////// diff --git a/src/win32_platform.h b/src/win32_platform.h index eeadbf22..79bbbb94 100644 --- a/src/win32_platform.h +++ b/src/win32_platform.h @@ -232,6 +232,12 @@ char* _glfwCreateUTF8FromWideString(const WCHAR* source); // Time void _glfwInitTimer(void); +// OpenGL support +int _glfwCreateContext(_GLFWwindow* window, + const _GLFWwndconfig* wndconfig, + const _GLFWfbconfig* fbconfig); +void _glfwDestroyContext(_GLFWwindow* window); + // Fullscreen support void _glfwSetVideoMode(int* width, int* height, int* bpp, int* refreshRate, diff --git a/src/win32_window.c b/src/win32_window.c index 935767ce..484c81b4 100755 --- a/src/win32_window.c +++ b/src/win32_window.c @@ -122,329 +122,6 @@ static void setForegroundWindow(HWND hWnd) } -//======================================================================== -// Returns the specified attribute of the specified pixel format -// NOTE: Do not call this unless we have found WGL_ARB_pixel_format -//======================================================================== - -static int getPixelFormatAttrib(_GLFWwindow* window, int pixelFormat, int attrib) -{ - int value = 0; - - if (!window->WGL.GetPixelFormatAttribivARB(window->WGL.DC, - pixelFormat, - 0, 1, &attrib, &value)) - { - // NOTE: We should probably handle this error somehow - return 0; - } - - return value; -} - - -//======================================================================== -// Return a list of available and usable framebuffer configs -//======================================================================== - -static _GLFWfbconfig* getFBConfigs(_GLFWwindow* window, unsigned int* found) -{ - _GLFWfbconfig* fbconfigs; - PIXELFORMATDESCRIPTOR pfd; - int i, available; - - *found = 0; - - if (window->WGL.ARB_pixel_format) - { - available = getPixelFormatAttrib(window, - 1, - WGL_NUMBER_PIXEL_FORMATS_ARB); - } - else - { - available = DescribePixelFormat(window->WGL.DC, - 1, - sizeof(PIXELFORMATDESCRIPTOR), - NULL); - } - - if (!available) - { - _glfwSetError(GLFW_OPENGL_UNAVAILABLE, "Win32/WGL: No pixel formats found"); - return NULL; - } - - fbconfigs = (_GLFWfbconfig*) malloc(sizeof(_GLFWfbconfig) * available); - if (!fbconfigs) - { - _glfwSetError(GLFW_OUT_OF_MEMORY, - "Win32/WGL: Failed to allocate _GLFWfbconfig array"); - return NULL; - } - - for (i = 1; i <= available; i++) - { - _GLFWfbconfig* f = fbconfigs + *found; - - if (window->WGL.ARB_pixel_format) - { - // Get pixel format attributes through WGL_ARB_pixel_format - if (!getPixelFormatAttrib(window, i, WGL_SUPPORT_OPENGL_ARB) || - !getPixelFormatAttrib(window, i, WGL_DRAW_TO_WINDOW_ARB) || - !getPixelFormatAttrib(window, i, WGL_DOUBLE_BUFFER_ARB)) - { - continue; - } - - if (getPixelFormatAttrib(window, i, WGL_PIXEL_TYPE_ARB) != - WGL_TYPE_RGBA_ARB) - { - continue; - } - - if (getPixelFormatAttrib(window, i, WGL_ACCELERATION_ARB) == - WGL_NO_ACCELERATION_ARB) - { - continue; - } - - f->redBits = getPixelFormatAttrib(window, i, WGL_RED_BITS_ARB); - f->greenBits = getPixelFormatAttrib(window, i, WGL_GREEN_BITS_ARB); - f->blueBits = getPixelFormatAttrib(window, i, WGL_BLUE_BITS_ARB); - f->alphaBits = getPixelFormatAttrib(window, i, WGL_ALPHA_BITS_ARB); - - f->depthBits = getPixelFormatAttrib(window, i, WGL_DEPTH_BITS_ARB); - f->stencilBits = getPixelFormatAttrib(window, i, WGL_STENCIL_BITS_ARB); - - f->accumRedBits = getPixelFormatAttrib(window, i, WGL_ACCUM_RED_BITS_ARB); - f->accumGreenBits = getPixelFormatAttrib(window, i, WGL_ACCUM_GREEN_BITS_ARB); - f->accumBlueBits = getPixelFormatAttrib(window, i, WGL_ACCUM_BLUE_BITS_ARB); - f->accumAlphaBits = getPixelFormatAttrib(window, i, WGL_ACCUM_ALPHA_BITS_ARB); - - f->auxBuffers = getPixelFormatAttrib(window, i, WGL_AUX_BUFFERS_ARB); - f->stereo = getPixelFormatAttrib(window, i, WGL_STEREO_ARB); - - if (window->WGL.ARB_multisample) - f->samples = getPixelFormatAttrib(window, i, WGL_SAMPLES_ARB); - else - f->samples = 0; - } - else - { - // Get pixel format attributes through old-fashioned PFDs - - if (!DescribePixelFormat(window->WGL.DC, - i, - sizeof(PIXELFORMATDESCRIPTOR), - &pfd)) - { - continue; - } - - if (!(pfd.dwFlags & PFD_DRAW_TO_WINDOW) || - !(pfd.dwFlags & PFD_SUPPORT_OPENGL) || - !(pfd.dwFlags & PFD_DOUBLEBUFFER)) - { - continue; - } - - if (!(pfd.dwFlags & PFD_GENERIC_ACCELERATED) && - (pfd.dwFlags & PFD_GENERIC_FORMAT)) - { - continue; - } - - if (pfd.iPixelType != PFD_TYPE_RGBA) - continue; - - f->redBits = pfd.cRedBits; - f->greenBits = pfd.cGreenBits; - f->blueBits = pfd.cBlueBits; - f->alphaBits = pfd.cAlphaBits; - - f->depthBits = pfd.cDepthBits; - f->stencilBits = pfd.cStencilBits; - - f->accumRedBits = pfd.cAccumRedBits; - f->accumGreenBits = pfd.cAccumGreenBits; - f->accumBlueBits = pfd.cAccumBlueBits; - f->accumAlphaBits = pfd.cAccumAlphaBits; - - f->auxBuffers = pfd.cAuxBuffers; - f->stereo = (pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE; - - // PFD pixel formats do not support FSAA - f->samples = 0; - } - - f->platformID = i; - - (*found)++; - } - - if (*found == 0) - { - free(fbconfigs); - return NULL; - } - - return fbconfigs; -} - - -//======================================================================== -// Creates an OpenGL context on the specified device context -//======================================================================== - -static GLboolean createContext(_GLFWwindow* window, - const _GLFWwndconfig* wndconfig, - int pixelFormat) -{ - PIXELFORMATDESCRIPTOR pfd; - int i = 0, attribs[40]; - HGLRC share = NULL; - - if (wndconfig->share) - share = wndconfig->share->WGL.context; - - if (!DescribePixelFormat(window->WGL.DC, pixelFormat, sizeof(pfd), &pfd)) - { - _glfwSetError(GLFW_OPENGL_UNAVAILABLE, - "Win32/WGL: Failed to retrieve PFD for selected pixel format"); - return GL_FALSE; - } - - if (!SetPixelFormat(window->WGL.DC, pixelFormat, &pfd)) - { - _glfwSetError(GLFW_OPENGL_UNAVAILABLE, - "Win32/WGL: Failed to set selected pixel format"); - return GL_FALSE; - } - - if (window->WGL.ARB_create_context) - { - // Use the newer wglCreateContextAttribsARB creation method - - if (wndconfig->glMajor != 1 || wndconfig->glMinor != 0) - { - // Request an explicitly versioned context - - attribs[i++] = WGL_CONTEXT_MAJOR_VERSION_ARB; - attribs[i++] = wndconfig->glMajor; - attribs[i++] = WGL_CONTEXT_MINOR_VERSION_ARB; - attribs[i++] = wndconfig->glMinor; - } - - if (wndconfig->glForward || wndconfig->glDebug || wndconfig->glRobustness) - { - int flags = 0; - - if (wndconfig->glForward) - flags |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB; - - if (wndconfig->glDebug) - flags |= WGL_CONTEXT_DEBUG_BIT_ARB; - - if (wndconfig->glRobustness) - flags |= WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB; - - attribs[i++] = WGL_CONTEXT_FLAGS_ARB; - attribs[i++] = flags; - } - - if (wndconfig->glProfile) - { - int flags = 0; - - if (!window->WGL.ARB_create_context_profile) - { - _glfwSetError(GLFW_VERSION_UNAVAILABLE, - "Win32/WGL: OpenGL profile requested but " - "WGL_ARB_create_context_profile is unavailable"); - return GL_FALSE; - } - - if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE && - !window->WGL.EXT_create_context_es2_profile) - { - _glfwSetError(GLFW_VERSION_UNAVAILABLE, - "Win32/WGL: OpenGL ES 2.x profile requested but " - "WGL_EXT_create_context_es2_profile is unavailable"); - return GL_FALSE; - } - - if (wndconfig->glProfile == GLFW_OPENGL_CORE_PROFILE) - flags = WGL_CONTEXT_CORE_PROFILE_BIT_ARB; - else if (wndconfig->glProfile == GLFW_OPENGL_COMPAT_PROFILE) - flags = WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; - else if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE) - flags = WGL_CONTEXT_ES2_PROFILE_BIT_EXT; - - attribs[i++] = WGL_CONTEXT_PROFILE_MASK_ARB; - attribs[i++] = flags; - } - - if (wndconfig->glRobustness) - { - int strategy; - - if (!window->WGL.ARB_create_context_robustness) - { - _glfwSetError(GLFW_VERSION_UNAVAILABLE, - "Win32/WGL: An OpenGL robustness strategy was " - "requested but WGL_ARB_create_context_robustness " - "is unavailable"); - return GL_FALSE; - } - - if (wndconfig->glRobustness == GLFW_OPENGL_NO_RESET_NOTIFICATION) - strategy = WGL_NO_RESET_NOTIFICATION_ARB; - else if (wndconfig->glRobustness == GLFW_OPENGL_LOSE_CONTEXT_ON_RESET) - strategy = WGL_LOSE_CONTEXT_ON_RESET_ARB; - - attribs[i++] = WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB; - attribs[i++] = strategy; - } - - attribs[i++] = 0; - - window->WGL.context = window->WGL.CreateContextAttribsARB(window->WGL.DC, - share, - attribs); - if (!window->WGL.context) - { - _glfwSetError(GLFW_VERSION_UNAVAILABLE, - "Win32/WGL: Failed to create OpenGL context"); - return GL_FALSE; - } - } - else - { - window->WGL.context = wglCreateContext(window->WGL.DC); - if (!window->WGL.context) - { - _glfwSetError(GLFW_PLATFORM_ERROR, - "Win32/WGL: Failed to create OpenGL context"); - return GL_FALSE; - } - - if (share) - { - if (!wglShareLists(share, window->WGL.context)) - { - _glfwSetError(GLFW_PLATFORM_ERROR, - "Win32/WGL: Failed to enable sharing with " - "specified OpenGL context"); - return GL_FALSE; - } - } - } - - return GL_TRUE; -} - - //======================================================================== // Hide mouse cursor //======================================================================== @@ -1104,94 +781,6 @@ static void getFullWindowSize(_GLFWwindow* window, } -//======================================================================== -// Initialize WGL-specific extensions -// This function is called once before initial context creation, i.e. before -// any WGL extensions could be present. This is done in order to have both -// extension variable clearing and loading in the same place, hopefully -// decreasing the possibility of forgetting to add one without the other. -//======================================================================== - -static void initWGLExtensions(_GLFWwindow* window) -{ - // This needs to include every function pointer loaded below - window->WGL.SwapIntervalEXT = NULL; - window->WGL.GetPixelFormatAttribivARB = NULL; - window->WGL.GetExtensionsStringARB = NULL; - window->WGL.GetExtensionsStringEXT = NULL; - window->WGL.CreateContextAttribsARB = NULL; - - // This needs to include every extension used below except for - // WGL_ARB_extensions_string and WGL_EXT_extensions_string - window->WGL.ARB_multisample = GL_FALSE; - window->WGL.ARB_create_context = GL_FALSE; - window->WGL.ARB_create_context_profile = GL_FALSE; - window->WGL.EXT_create_context_es2_profile = GL_FALSE; - window->WGL.ARB_create_context_robustness = GL_FALSE; - window->WGL.EXT_swap_control = GL_FALSE; - window->WGL.ARB_pixel_format = GL_FALSE; - - window->WGL.GetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC) - wglGetProcAddress("wglGetExtensionsStringEXT"); - if (!window->WGL.GetExtensionsStringEXT) - { - window->WGL.GetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC) - wglGetProcAddress("wglGetExtensionsStringARB"); - if (!window->WGL.GetExtensionsStringARB) - return; - } - - if (_glfwPlatformExtensionSupported("WGL_ARB_multisample")) - window->WGL.ARB_multisample = GL_TRUE; - - if (_glfwPlatformExtensionSupported("WGL_ARB_create_context")) - { - window->WGL.CreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) - wglGetProcAddress("wglCreateContextAttribsARB"); - - if (window->WGL.CreateContextAttribsARB) - window->WGL.ARB_create_context = GL_TRUE; - } - - if (window->WGL.ARB_create_context) - { - if (_glfwPlatformExtensionSupported("WGL_ARB_create_context_profile")) - window->WGL.ARB_create_context_profile = GL_TRUE; - } - - if (window->WGL.ARB_create_context && - window->WGL.ARB_create_context_profile) - { - if (_glfwPlatformExtensionSupported("WGL_EXT_create_context_es2_profile")) - window->WGL.EXT_create_context_es2_profile = GL_TRUE; - } - - if (window->WGL.ARB_create_context) - { - if (_glfwPlatformExtensionSupported("WGL_ARB_create_context_robustness")) - window->WGL.ARB_create_context_robustness = GL_TRUE; - } - - if (_glfwPlatformExtensionSupported("WGL_EXT_swap_control")) - { - window->WGL.SwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC) - wglGetProcAddress("wglSwapIntervalEXT"); - - if (window->WGL.SwapIntervalEXT) - window->WGL.EXT_swap_control = GL_TRUE; - } - - if (_glfwPlatformExtensionSupported("WGL_ARB_pixel_format")) - { - window->WGL.GetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC) - wglGetProcAddress("wglGetPixelFormatAttribivARB"); - - if (window->WGL.GetPixelFormatAttribivARB) - window->WGL.ARB_pixel_format = GL_TRUE; - } -} - - //======================================================================== // Registers the GLFW window class //======================================================================== @@ -1232,38 +821,6 @@ static ATOM registerWindowClass(void) } -//======================================================================== -// Returns the closest matching pixel format, or zero on error -//======================================================================== - -static int choosePixelFormat(_GLFWwindow* window, const _GLFWfbconfig* fbconfig) -{ - unsigned int fbcount; - int pixelFormat; - _GLFWfbconfig* fbconfigs; - const _GLFWfbconfig* closest; - - fbconfigs = getFBConfigs(window, &fbcount); - if (!fbconfigs) - return 0; - - closest = _glfwChooseFBConfig(fbconfig, fbconfigs, fbcount); - if (!closest) - { - free(fbconfigs); - return 0; - } - - pixelFormat = (int) closest->platformID; - - free(fbconfigs); - fbconfigs = NULL; - closest = NULL; - - return pixelFormat; -} - - //======================================================================== // Creates the GLFW window and rendering context //======================================================================== @@ -1273,7 +830,7 @@ static int createWindow(_GLFWwindow* window, const _GLFWfbconfig* fbconfig) { DWORD dwStyle, dwExStyle; - int pixelFormat, fullWidth, fullHeight; + int fullWidth, fullHeight; RECT wa; POINT pos; WCHAR* wideTitle; @@ -1353,31 +910,15 @@ static int createWindow(_GLFWwindow* window, free(wideTitle); - window->WGL.DC = GetDC(window->Win32.handle); - if (!window->WGL.DC) - { - _glfwSetError(GLFW_PLATFORM_ERROR, - "Win32/WGL: Failed to retrieve DC for window"); - return GL_FALSE; - } - - pixelFormat = choosePixelFormat(window, fbconfig); - if (!pixelFormat) - return GL_FALSE; - - if (!createContext(window, wndconfig, pixelFormat)) - return GL_FALSE; - - glfwMakeContextCurrent(window); - - initWGLExtensions(window); - // Initialize cursor position data GetCursorPos(&pos); ScreenToClient(window->Win32.handle, &pos); window->Win32.oldCursorX = window->cursorPosX = pos.x; window->Win32.oldCursorY = window->cursorPosY = pos.y; + if (!_glfwCreateContext(window, wndconfig, fbconfig)) + return GL_FALSE; + return GL_TRUE; } @@ -1388,28 +929,13 @@ static int createWindow(_GLFWwindow* window, static void destroyWindow(_GLFWwindow* window) { - // This is duplicated from glfwCloseWindow - // TODO: Stop duplicating code - if (window == _glfwLibrary.currentWindow) - glfwMakeContextCurrent(NULL); + _glfwDestroyContext(window); // This is duplicated from glfwCloseWindow // TODO: Stop duplicating code if (window == _glfwLibrary.activeWindow) _glfwLibrary.activeWindow = NULL; - if (window->WGL.context) - { - wglDeleteContext(window->WGL.context); - window->WGL.context = NULL; - } - - if (window->WGL.DC) - { - ReleaseDC(window->Win32.handle, window->WGL.DC); - window->WGL.DC = NULL; - } - if (window->Win32.handle) { DestroyWindow(window->Win32.handle); @@ -1669,93 +1195,10 @@ void _glfwPlatformRestoreWindow(_GLFWwindow* window) void _glfwPlatformRefreshWindowParams(void) { - PIXELFORMATDESCRIPTOR pfd; DEVMODE dm; - int pixelFormat; - _GLFWwindow* window = _glfwLibrary.currentWindow; - // Obtain a detailed description of current pixel format - pixelFormat = GetPixelFormat(window->WGL.DC); - - if (window->WGL.ARB_pixel_format) - { - if (getPixelFormatAttrib(window, pixelFormat, WGL_ACCELERATION_ARB) != - WGL_NO_ACCELERATION_ARB) - { - window->accelerated = GL_TRUE; - } - else - window->accelerated = GL_FALSE; - - window->redBits = - getPixelFormatAttrib(window, pixelFormat, WGL_RED_BITS_ARB); - window->greenBits = - getPixelFormatAttrib(window, pixelFormat, WGL_GREEN_BITS_ARB); - window->blueBits = - getPixelFormatAttrib(window, pixelFormat, WGL_BLUE_BITS_ARB); - - window->alphaBits = - getPixelFormatAttrib(window, pixelFormat, WGL_ALPHA_BITS_ARB); - window->depthBits = - getPixelFormatAttrib(window, pixelFormat, WGL_DEPTH_BITS_ARB); - window->stencilBits = - getPixelFormatAttrib(window, pixelFormat, WGL_STENCIL_BITS_ARB); - - window->accumRedBits = - getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_RED_BITS_ARB); - window->accumGreenBits = - getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_GREEN_BITS_ARB); - window->accumBlueBits = - getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_BLUE_BITS_ARB); - window->accumAlphaBits = - getPixelFormatAttrib(window, pixelFormat, WGL_ACCUM_ALPHA_BITS_ARB); - - window->auxBuffers = - getPixelFormatAttrib(window, pixelFormat, WGL_AUX_BUFFERS_ARB); - window->stereo = - getPixelFormatAttrib(window, pixelFormat, WGL_STEREO_ARB) ? GL_TRUE : GL_FALSE; - - if (window->WGL.ARB_multisample) - { - window->samples = getPixelFormatAttrib(window, pixelFormat, WGL_SAMPLES_ARB); - - // We force 1 to zero here because all the other APIs say zero when - // they really mean 1 - if (window->samples == 1) - window->samples = 0; - } - else - window->samples = 0; - } - else - { - DescribePixelFormat(window->WGL.DC, pixelFormat, - sizeof(PIXELFORMATDESCRIPTOR), &pfd); - - // Is current OpenGL context accelerated? - window->accelerated = (pfd.dwFlags & PFD_GENERIC_ACCELERATED) || - !(pfd.dwFlags & PFD_GENERIC_FORMAT) ? 1 : 0; - - // "Standard" window parameters - window->redBits = pfd.cRedBits; - window->greenBits = pfd.cGreenBits; - window->blueBits = pfd.cBlueBits; - window->alphaBits = pfd.cAlphaBits; - window->depthBits = pfd.cDepthBits; - window->stencilBits = pfd.cStencilBits; - window->accumRedBits = pfd.cAccumRedBits; - window->accumGreenBits = pfd.cAccumGreenBits; - window->accumBlueBits = pfd.cAccumBlueBits; - window->accumAlphaBits = pfd.cAccumAlphaBits; - window->auxBuffers = pfd.cAuxBuffers; - window->stereo = (pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE; - - // If we don't have WGL_ARB_pixel_format then we can't have created a - // multisampling context, so it's safe to hardcode zero here - window->samples = 0; - } - + ZeroMemory(&dm, sizeof(DEVMODE)); dm.dmSize = sizeof(DEVMODE); if (EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &dm))