| //======================================================================== |
| // GLFW 3.0 GLX - www.glfw.org |
| //------------------------------------------------------------------------ |
| // Copyright (c) 2002-2006 Marcus Geelnard |
| // Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.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. |
| // |
| //======================================================================== |
| |
| #include "internal.h" |
| |
| #include <string.h> |
| #include <stdlib.h> |
| #include <assert.h> |
| #include <pthread.h> |
| |
| |
| // This is the only glXGetProcAddress variant not declared by glxext.h |
| void (*glXGetProcAddressEXT(const GLubyte* procName))(); |
| |
| |
| #ifndef GLXBadProfileARB |
| #define GLXBadProfileARB 13 |
| #endif |
| |
| |
| // Returns the specified attribute of the specified GLXFBConfig |
| // NOTE: Do not call this unless we have found GLX 1.3+ or GLX_SGIX_fbconfig |
| // |
| static int getFBConfigAttrib(GLXFBConfig fbconfig, int attrib) |
| { |
| int value; |
| |
| if (_glfw.glx.SGIX_fbconfig) |
| { |
| _glfw.glx.GetFBConfigAttribSGIX(_glfw.x11.display, |
| fbconfig, attrib, &value); |
| } |
| else |
| glXGetFBConfigAttrib(_glfw.x11.display, fbconfig, attrib, &value); |
| |
| return value; |
| } |
| |
| // Return a list of available and usable framebuffer configs |
| // |
| static GLboolean chooseFBConfig(const _GLFWfbconfig* desired, GLXFBConfig* result) |
| { |
| GLXFBConfig* nativeConfigs; |
| _GLFWfbconfig* usableConfigs; |
| const _GLFWfbconfig* closest; |
| int i, nativeCount, usableCount; |
| const char* vendor; |
| GLboolean trustWindowBit = GL_TRUE; |
| |
| vendor = glXGetClientString(_glfw.x11.display, GLX_VENDOR); |
| if (strcmp(vendor, "Chromium") == 0) |
| { |
| // HACK: This is a (hopefully temporary) workaround for Chromium |
| // (VirtualBox GL) not setting the window bit on any GLXFBConfigs |
| trustWindowBit = GL_FALSE; |
| } |
| |
| if (_glfw.glx.SGIX_fbconfig) |
| { |
| nativeConfigs = _glfw.glx.ChooseFBConfigSGIX(_glfw.x11.display, |
| _glfw.x11.screen, |
| NULL, |
| &nativeCount); |
| } |
| else |
| { |
| nativeConfigs = glXGetFBConfigs(_glfw.x11.display, |
| _glfw.x11.screen, |
| &nativeCount); |
| } |
| |
| if (!nativeCount) |
| { |
| _glfwInputError(GLFW_API_UNAVAILABLE, |
| "GLX: No GLXFBConfigs returned"); |
| return GL_FALSE; |
| } |
| |
| usableConfigs = calloc(nativeCount, sizeof(_GLFWfbconfig)); |
| usableCount = 0; |
| |
| for (i = 0; i < nativeCount; i++) |
| { |
| const GLXFBConfig n = nativeConfigs[i]; |
| _GLFWfbconfig* u = usableConfigs + usableCount; |
| |
| if (!getFBConfigAttrib(n, GLX_DOUBLEBUFFER) || |
| !getFBConfigAttrib(n, GLX_VISUAL_ID)) |
| { |
| // Only consider double-buffered GLXFBConfigs with associated visuals |
| continue; |
| } |
| |
| if (!(getFBConfigAttrib(n, GLX_RENDER_TYPE) & GLX_RGBA_BIT)) |
| { |
| // Only consider RGBA GLXFBConfigs |
| continue; |
| } |
| |
| if (!(getFBConfigAttrib(n, GLX_DRAWABLE_TYPE) & GLX_WINDOW_BIT)) |
| { |
| if (trustWindowBit) |
| { |
| // Only consider window GLXFBConfigs |
| continue; |
| } |
| } |
| |
| u->redBits = getFBConfigAttrib(n, GLX_RED_SIZE); |
| u->greenBits = getFBConfigAttrib(n, GLX_GREEN_SIZE); |
| u->blueBits = getFBConfigAttrib(n, GLX_BLUE_SIZE); |
| |
| u->alphaBits = getFBConfigAttrib(n, GLX_ALPHA_SIZE); |
| u->depthBits = getFBConfigAttrib(n, GLX_DEPTH_SIZE); |
| u->stencilBits = getFBConfigAttrib(n, GLX_STENCIL_SIZE); |
| |
| u->accumRedBits = getFBConfigAttrib(n, GLX_ACCUM_RED_SIZE); |
| u->accumGreenBits = getFBConfigAttrib(n, GLX_ACCUM_GREEN_SIZE); |
| u->accumBlueBits = getFBConfigAttrib(n, GLX_ACCUM_BLUE_SIZE); |
| u->accumAlphaBits = getFBConfigAttrib(n, GLX_ACCUM_ALPHA_SIZE); |
| |
| u->auxBuffers = getFBConfigAttrib(n, GLX_AUX_BUFFERS); |
| u->stereo = getFBConfigAttrib(n, GLX_STEREO); |
| |
| if (_glfw.glx.ARB_multisample) |
| u->samples = getFBConfigAttrib(n, GLX_SAMPLES); |
| |
| if (_glfw.glx.ARB_framebuffer_sRGB) |
| u->sRGB = getFBConfigAttrib(n, GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB); |
| |
| u->glx = n; |
| usableCount++; |
| } |
| |
| closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount); |
| if (closest) |
| *result = closest->glx; |
| |
| XFree(nativeConfigs); |
| free(usableConfigs); |
| |
| return closest ? GL_TRUE : GL_FALSE; |
| } |
| |
| // Create the OpenGL context using legacy API |
| // |
| static GLXContext createLegacyContext(_GLFWwindow* window, |
| GLXFBConfig fbconfig, |
| GLXContext share) |
| { |
| if (_glfw.glx.SGIX_fbconfig) |
| { |
| return _glfw.glx.CreateContextWithConfigSGIX(_glfw.x11.display, |
| fbconfig, |
| GLX_RGBA_TYPE, |
| share, |
| True); |
| } |
| |
| return glXCreateNewContext(_glfw.x11.display, |
| fbconfig, |
| GLX_RGBA_TYPE, |
| share, |
| True); |
| } |
| |
| |
| ////////////////////////////////////////////////////////////////////////// |
| ////// GLFW internal API ////// |
| ////////////////////////////////////////////////////////////////////////// |
| |
| // Initialize GLX |
| // |
| int _glfwInitContextAPI(void) |
| { |
| #ifdef _GLFW_DLOPEN_LIBGL |
| int i; |
| char* libGL_names[ ] = |
| { |
| "libGL.so", |
| "libGL.so.1", |
| "/usr/lib/libGL.so", |
| "/usr/lib/libGL.so.1", |
| NULL |
| }; |
| |
| for (i = 0; libGL_names[i] != NULL; i++) |
| { |
| _glfw.glx.libGL = dlopen(libGL_names[i], RTLD_LAZY | RTLD_GLOBAL); |
| if (_glfw.glx.libGL) |
| break; |
| } |
| |
| if (!_glfw.glx.libGL) |
| { |
| _glfwInputError(GLFW_PLATFORM_ERROR, "GLX: Failed to find libGL"); |
| return GL_FALSE; |
| } |
| #endif |
| |
| if (pthread_key_create(&_glfw.glx.current, NULL) != 0) |
| { |
| _glfwInputError(GLFW_PLATFORM_ERROR, |
| "GLX: Failed to create context TLS"); |
| return GL_FALSE; |
| } |
| |
| // Check if GLX is supported on this display |
| if (!glXQueryExtension(_glfw.x11.display, |
| &_glfw.glx.errorBase, |
| &_glfw.glx.eventBase)) |
| { |
| _glfwInputError(GLFW_API_UNAVAILABLE, "GLX: GLX support not found"); |
| return GL_FALSE; |
| } |
| |
| if (!glXQueryVersion(_glfw.x11.display, |
| &_glfw.glx.versionMajor, |
| &_glfw.glx.versionMinor)) |
| { |
| _glfwInputError(GLFW_API_UNAVAILABLE, |
| "GLX: Failed to query GLX version"); |
| return GL_FALSE; |
| } |
| |
| if (_glfwPlatformExtensionSupported("GLX_EXT_swap_control")) |
| { |
| _glfw.glx.SwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC) |
| _glfwPlatformGetProcAddress("glXSwapIntervalEXT"); |
| |
| if (_glfw.glx.SwapIntervalEXT) |
| _glfw.glx.EXT_swap_control = GL_TRUE; |
| } |
| |
| if (_glfwPlatformExtensionSupported("GLX_SGI_swap_control")) |
| { |
| _glfw.glx.SwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC) |
| _glfwPlatformGetProcAddress("glXSwapIntervalSGI"); |
| |
| if (_glfw.glx.SwapIntervalSGI) |
| _glfw.glx.SGI_swap_control = GL_TRUE; |
| } |
| |
| if (_glfwPlatformExtensionSupported("GLX_MESA_swap_control")) |
| { |
| _glfw.glx.SwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC) |
| _glfwPlatformGetProcAddress("glXSwapIntervalMESA"); |
| |
| if (_glfw.glx.SwapIntervalMESA) |
| _glfw.glx.MESA_swap_control = GL_TRUE; |
| } |
| |
| if (_glfwPlatformExtensionSupported("GLX_SGIX_fbconfig")) |
| { |
| _glfw.glx.GetFBConfigAttribSGIX = (PFNGLXGETFBCONFIGATTRIBSGIXPROC) |
| _glfwPlatformGetProcAddress("glXGetFBConfigAttribSGIX"); |
| _glfw.glx.ChooseFBConfigSGIX = (PFNGLXCHOOSEFBCONFIGSGIXPROC) |
| _glfwPlatformGetProcAddress("glXChooseFBConfigSGIX"); |
| _glfw.glx.CreateContextWithConfigSGIX = (PFNGLXCREATECONTEXTWITHCONFIGSGIXPROC) |
| _glfwPlatformGetProcAddress("glXCreateContextWithConfigSGIX"); |
| _glfw.glx.GetVisualFromFBConfigSGIX = (PFNGLXGETVISUALFROMFBCONFIGSGIXPROC) |
| _glfwPlatformGetProcAddress("glXGetVisualFromFBConfigSGIX"); |
| |
| if (_glfw.glx.GetFBConfigAttribSGIX && |
| _glfw.glx.ChooseFBConfigSGIX && |
| _glfw.glx.CreateContextWithConfigSGIX && |
| _glfw.glx.GetVisualFromFBConfigSGIX) |
| { |
| _glfw.glx.SGIX_fbconfig = GL_TRUE; |
| } |
| } |
| |
| if (_glfwPlatformExtensionSupported("GLX_ARB_multisample")) |
| _glfw.glx.ARB_multisample = GL_TRUE; |
| |
| if (_glfwPlatformExtensionSupported("GLX_ARB_framebuffer_sRGB")) |
| _glfw.glx.ARB_framebuffer_sRGB = GL_TRUE; |
| |
| if (_glfwPlatformExtensionSupported("GLX_ARB_create_context")) |
| { |
| _glfw.glx.CreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC) |
| _glfwPlatformGetProcAddress("glXCreateContextAttribsARB"); |
| |
| if (_glfw.glx.CreateContextAttribsARB) |
| _glfw.glx.ARB_create_context = GL_TRUE; |
| } |
| |
| if (_glfwPlatformExtensionSupported("GLX_ARB_create_context_robustness")) |
| _glfw.glx.ARB_create_context_robustness = GL_TRUE; |
| |
| if (_glfwPlatformExtensionSupported("GLX_ARB_create_context_profile")) |
| _glfw.glx.ARB_create_context_profile = GL_TRUE; |
| |
| if (_glfwPlatformExtensionSupported("GLX_EXT_create_context_es2_profile")) |
| _glfw.glx.EXT_create_context_es2_profile = GL_TRUE; |
| |
| return GL_TRUE; |
| } |
| |
| // Terminate GLX |
| // |
| void _glfwTerminateContextAPI(void) |
| { |
| // Unload libGL.so if necessary |
| #ifdef _GLFW_DLOPEN_LIBGL |
| if (_glfw.glx.libGL != NULL) |
| { |
| dlclose(_glfw.glx.libGL); |
| _glfw.glx.libGL = NULL; |
| } |
| #endif |
| |
| pthread_key_delete(_glfw.glx.current); |
| } |
| |
| #define setGLXattrib(attribName, attribValue) \ |
| { \ |
| attribs[index++] = attribName; \ |
| attribs[index++] = attribValue; \ |
| assert((size_t) index < sizeof(attribs) / sizeof(attribs[0])); \ |
| } |
| |
| // Prepare for creation of the OpenGL context |
| // |
| int _glfwCreateContext(_GLFWwindow* window, |
| const _GLFWwndconfig* wndconfig, |
| const _GLFWfbconfig* fbconfig) |
| { |
| int attribs[40]; |
| GLXFBConfig native; |
| GLXContext share = NULL; |
| |
| if (wndconfig->share) |
| share = wndconfig->share->glx.context; |
| |
| if (!chooseFBConfig(fbconfig, &native)) |
| { |
| _glfwInputError(GLFW_PLATFORM_ERROR, |
| "GLX: Failed to find a suitable GLXFBConfig"); |
| return GL_FALSE; |
| } |
| |
| // Retrieve the corresponding visual |
| if (_glfw.glx.SGIX_fbconfig) |
| { |
| window->glx.visual = |
| _glfw.glx.GetVisualFromFBConfigSGIX(_glfw.x11.display, native); |
| } |
| else |
| window->glx.visual = glXGetVisualFromFBConfig(_glfw.x11.display, native); |
| |
| if (window->glx.visual == NULL) |
| { |
| _glfwInputError(GLFW_PLATFORM_ERROR, |
| "GLX: Failed to retrieve visual for GLXFBConfig"); |
| return GL_FALSE; |
| } |
| |
| if (wndconfig->clientAPI == GLFW_OPENGL_ES_API) |
| { |
| if (!_glfw.glx.ARB_create_context || |
| !_glfw.glx.ARB_create_context_profile || |
| !_glfw.glx.EXT_create_context_es2_profile) |
| { |
| _glfwInputError(GLFW_API_UNAVAILABLE, |
| "GLX: OpenGL ES requested but " |
| "GLX_EXT_create_context_es2_profile is unavailable"); |
| return GL_FALSE; |
| } |
| } |
| |
| if (wndconfig->glForward) |
| { |
| if (!_glfw.glx.ARB_create_context) |
| { |
| _glfwInputError(GLFW_VERSION_UNAVAILABLE, |
| "GLX: Forward compatibility requested but " |
| "GLX_ARB_create_context_profile is unavailable"); |
| return GL_FALSE; |
| } |
| } |
| |
| if (wndconfig->glProfile) |
| { |
| if (!_glfw.glx.ARB_create_context || |
| !_glfw.glx.ARB_create_context_profile) |
| { |
| _glfwInputError(GLFW_VERSION_UNAVAILABLE, |
| "GLX: An OpenGL profile requested but " |
| "GLX_ARB_create_context_profile is unavailable"); |
| return GL_FALSE; |
| } |
| } |
| |
| _glfwGrabXErrorHandler(); |
| |
| if (_glfw.glx.ARB_create_context) |
| { |
| int index = 0, mask = 0, flags = 0, strategy = 0; |
| |
| if (wndconfig->clientAPI == GLFW_OPENGL_API) |
| { |
| if (wndconfig->glForward) |
| flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB; |
| |
| if (wndconfig->glDebug) |
| flags |= GLX_CONTEXT_DEBUG_BIT_ARB; |
| |
| if (wndconfig->glProfile) |
| { |
| if (wndconfig->glProfile == GLFW_OPENGL_CORE_PROFILE) |
| mask |= GLX_CONTEXT_CORE_PROFILE_BIT_ARB; |
| else if (wndconfig->glProfile == GLFW_OPENGL_COMPAT_PROFILE) |
| mask |= GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; |
| } |
| } |
| else |
| mask |= GLX_CONTEXT_ES2_PROFILE_BIT_EXT; |
| |
| if (wndconfig->glRobustness != GLFW_NO_ROBUSTNESS) |
| { |
| if (_glfw.glx.ARB_create_context_robustness) |
| { |
| if (wndconfig->glRobustness == GLFW_NO_RESET_NOTIFICATION) |
| strategy = GLX_NO_RESET_NOTIFICATION_ARB; |
| else if (wndconfig->glRobustness == GLFW_LOSE_CONTEXT_ON_RESET) |
| strategy = GLX_LOSE_CONTEXT_ON_RESET_ARB; |
| |
| flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB; |
| } |
| } |
| |
| if (wndconfig->glMajor != 1 || wndconfig->glMinor != 0) |
| { |
| // NOTE: Only request an explicitly versioned context when |
| // necessary, as explicitly requesting version 1.0 does not always |
| // return the highest available version |
| |
| setGLXattrib(GLX_CONTEXT_MAJOR_VERSION_ARB, wndconfig->glMajor); |
| setGLXattrib(GLX_CONTEXT_MINOR_VERSION_ARB, wndconfig->glMinor); |
| } |
| |
| if (mask) |
| setGLXattrib(GLX_CONTEXT_PROFILE_MASK_ARB, mask); |
| |
| if (flags) |
| setGLXattrib(GLX_CONTEXT_FLAGS_ARB, flags); |
| |
| if (strategy) |
| setGLXattrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB, strategy); |
| |
| setGLXattrib(None, None); |
| |
| window->glx.context = |
| _glfw.glx.CreateContextAttribsARB(_glfw.x11.display, |
| native, |
| share, |
| True, |
| attribs); |
| |
| if (window->glx.context == NULL) |
| { |
| // HACK: This is a fallback for the broken Mesa implementation of |
| // GLX_ARB_create_context_profile, which fails default 1.0 context |
| // creation with a GLXBadProfileARB error in violation of the spec |
| if (_glfw.x11.errorCode == _glfw.glx.errorBase + GLXBadProfileARB && |
| wndconfig->clientAPI == GLFW_OPENGL_API && |
| wndconfig->glProfile == GLFW_OPENGL_ANY_PROFILE && |
| wndconfig->glForward == GL_FALSE) |
| { |
| window->glx.context = createLegacyContext(window, native, share); |
| } |
| } |
| } |
| else |
| window->glx.context = createLegacyContext(window, native, share); |
| |
| _glfwReleaseXErrorHandler(); |
| |
| if (window->glx.context == NULL) |
| { |
| _glfwInputXError(GLFW_PLATFORM_ERROR, "GLX: Failed to create context"); |
| return GL_FALSE; |
| } |
| |
| return GL_TRUE; |
| } |
| |
| #undef setGLXattrib |
| |
| // Destroy the OpenGL context |
| // |
| void _glfwDestroyContext(_GLFWwindow* window) |
| { |
| if (window->glx.visual) |
| { |
| XFree(window->glx.visual); |
| window->glx.visual = NULL; |
| } |
| |
| if (window->glx.context) |
| { |
| glXDestroyContext(_glfw.x11.display, window->glx.context); |
| window->glx.context = NULL; |
| } |
| } |
| |
| |
| ////////////////////////////////////////////////////////////////////////// |
| ////// GLFW platform API ////// |
| ////////////////////////////////////////////////////////////////////////// |
| |
| void _glfwPlatformMakeContextCurrent(_GLFWwindow* window) |
| { |
| if (window) |
| { |
| glXMakeCurrent(_glfw.x11.display, |
| window->x11.handle, |
| window->glx.context); |
| } |
| else |
| glXMakeCurrent(_glfw.x11.display, None, NULL); |
| |
| pthread_setspecific(_glfw.glx.current, window); |
| } |
| |
| _GLFWwindow* _glfwPlatformGetCurrentContext(void) |
| { |
| return (_GLFWwindow*) pthread_getspecific(_glfw.glx.current); |
| } |
| |
| void _glfwPlatformSwapBuffers(_GLFWwindow* window) |
| { |
| glXSwapBuffers(_glfw.x11.display, window->x11.handle); |
| } |
| |
| void _glfwPlatformSwapInterval(int interval) |
| { |
| _GLFWwindow* window = _glfwPlatformGetCurrentContext(); |
| |
| if (_glfw.glx.EXT_swap_control) |
| { |
| _glfw.glx.SwapIntervalEXT(_glfw.x11.display, |
| window->x11.handle, |
| interval); |
| } |
| else if (_glfw.glx.MESA_swap_control) |
| _glfw.glx.SwapIntervalMESA(interval); |
| else if (_glfw.glx.SGI_swap_control) |
| { |
| if (interval > 0) |
| _glfw.glx.SwapIntervalSGI(interval); |
| } |
| } |
| |
| int _glfwPlatformExtensionSupported(const char* extension) |
| { |
| const GLubyte* extensions; |
| |
| // Get list of GLX extensions |
| extensions = (const GLubyte*) glXQueryExtensionsString(_glfw.x11.display, |
| _glfw.x11.screen); |
| if (extensions != NULL) |
| { |
| if (_glfwStringInExtensionString(extension, extensions)) |
| return GL_TRUE; |
| } |
| |
| return GL_FALSE; |
| } |
| |
| GLFWglproc _glfwPlatformGetProcAddress(const char* procname) |
| { |
| return _glfw_glXGetProcAddress((const GLubyte*) procname); |
| } |
| |
| |
| ////////////////////////////////////////////////////////////////////////// |
| ////// GLFW native API ////// |
| ////////////////////////////////////////////////////////////////////////// |
| |
| GLFWAPI GLXContext glfwGetGLXContext(GLFWwindow* handle) |
| { |
| _GLFWwindow* window = (_GLFWwindow*) handle; |
| _GLFW_REQUIRE_INIT_OR_RETURN(NULL); |
| return window->glx.context; |
| } |
| |
