// Create the OpenGL or OpenGL ES context
//
int _glfwCreateContext(_GLFWwindow* window,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig)
{
int attribs[40];
EGLConfig config;
EGLContext share = NULL;
if (ctxconfig->share)
share = ctxconfig->share->egl.context;
if (!chooseFBConfigs(ctxconfig, fbconfig, &config))
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"EGL: Failed to find a suitable EGLConfig");
return GL_FALSE;
}
#if defined(_GLFW_X11)
// Retrieve the visual corresponding to the chosen EGL config
{
EGLint count = 0;
int mask;
EGLint redBits, greenBits, blueBits, alphaBits, visualID = 0;
XVisualInfo info;
eglGetConfigAttrib(_glfw.egl.display, config,
EGL_NATIVE_VISUAL_ID, &visualID);
info.screen = _glfw.x11.screen;
mask = VisualScreenMask;
if (visualID)
{
// The X window visual must match the EGL config
info.visualid = visualID;
mask |= VisualIDMask;
}
else
{
// some EGL drivers don't implement the EGL_NATIVE_VISUAL_ID
// attribute, so attempt to find the closest match.
eglGetConfigAttrib(_glfw.egl.display, config,
EGL_RED_SIZE, &redBits);
eglGetConfigAttrib(_glfw.egl.display, config,
EGL_GREEN_SIZE, &greenBits);
eglGetConfigAttrib(_glfw.egl.display, config,
EGL_BLUE_SIZE, &blueBits);
eglGetConfigAttrib(_glfw.egl.display, config,
EGL_ALPHA_SIZE, &alphaBits);
info.depth = redBits + greenBits + blueBits + alphaBits;
mask |= VisualDepthMask;
}
window->egl.visual = XGetVisualInfo(_glfw.x11.display,
mask, &info, &count);
if (!window->egl.visual)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"EGL: Failed to retrieve visual for EGLConfig");
return GL_FALSE;
}
}
#endif // _GLFW_X11
if (ctxconfig->api == GLFW_OPENGL_ES_API)
{
if (!eglBindAPI(EGL_OPENGL_ES_API))
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"EGL: Failed to bind OpenGL ES: %s",
getErrorString(eglGetError()));
return GL_FALSE;
}
}
else
{
if (!eglBindAPI(EGL_OPENGL_API))
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"EGL: Failed to bind OpenGL: %s",
getErrorString(eglGetError()));
return GL_FALSE;
}
}
if (_glfw.egl.KHR_create_context)
{
int index = 0, mask = 0, flags = 0, strategy = 0;
if (ctxconfig->api == GLFW_OPENGL_API)
{
if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE)
mask |= EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR;
else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE)
mask |= EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR;
if (ctxconfig->forward)
flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
}
if (ctxconfig->debug)
flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;
if (ctxconfig->robustness)
{
if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION)
strategy = EGL_NO_RESET_NOTIFICATION_KHR;
else if (ctxconfig->robustness == GLFW_LOSE_CONTEXT_ON_RESET)
strategy = EGL_LOSE_CONTEXT_ON_RESET_KHR;
flags |= EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR;
}
if (ctxconfig->major != 1 || ctxconfig->minor != 0)
{
setEGLattrib(EGL_CONTEXT_MAJOR_VERSION_KHR, ctxconfig->major);
setEGLattrib(EGL_CONTEXT_MINOR_VERSION_KHR, ctxconfig->minor);
}
if (mask)
setEGLattrib(EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR, mask);
if (flags)
setEGLattrib(EGL_CONTEXT_FLAGS_KHR, flags);
if (strategy)
setEGLattrib(EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR, strategy);
setEGLattrib(EGL_NONE, EGL_NONE);
}
else
{
int index = 0;
if (ctxconfig->api == GLFW_OPENGL_ES_API)
setEGLattrib(EGL_CONTEXT_CLIENT_VERSION, ctxconfig->major);
setEGLattrib(EGL_NONE, EGL_NONE);
}
// Context release behaviors (GL_KHR_context_flush_control) are not yet
// supported on EGL but are not a hard constraint, so ignore and continue
window->egl.context = eglCreateContext(_glfw.egl.display,
config, share, attribs);
if (window->egl.context == EGL_NO_CONTEXT)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"EGL: Failed to create context: %s",
getErrorString(eglGetError()));
return GL_FALSE;
}
window->egl.config = config;
return GL_TRUE;
}
static int createContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
EGLint fbconfigID)
{
int attribs[40];
EGLint count;
EGLConfig config;
EGLContext share = NULL;
if (wndconfig->share)
share = wndconfig->share->egl.context;
// Retrieve the previously selected EGLConfig
{
int index = 0;
setEGLattrib(EGL_CONFIG_ID, fbconfigID);
setEGLattrib(EGL_NONE, EGL_NONE);
eglChooseConfig(_glfw.egl.display, attribs, &config, 1, &count);
if (!count)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"EGL: Failed to retrieve the selected EGLConfig");
return GL_FALSE;
}
}
#if defined(_GLFW_X11)
// Retrieve the visual corresponding to the chosen EGL config
{
int mask;
EGLint redBits, greenBits, blueBits, alphaBits, visualID = 0;
XVisualInfo info;
eglGetConfigAttrib(_glfw.egl.display, config,
EGL_NATIVE_VISUAL_ID, &visualID);
info.screen = _glfw.x11.screen;
mask = VisualScreenMask;
if (visualID)
{
// The X window visual must match the EGL config
info.visualid = visualID;
mask |= VisualIDMask;
}
else
{
// some EGL drivers don't implement the EGL_NATIVE_VISUAL_ID
// attribute, so attempt to find the closest match.
eglGetConfigAttrib(_glfw.egl.display, config,
EGL_RED_SIZE, &redBits);
eglGetConfigAttrib(_glfw.egl.display, config,
EGL_GREEN_SIZE, &greenBits);
eglGetConfigAttrib(_glfw.egl.display, config,
EGL_BLUE_SIZE, &blueBits);
eglGetConfigAttrib(_glfw.egl.display, config,
EGL_ALPHA_SIZE, &alphaBits);
info.depth = redBits + greenBits + blueBits + alphaBits;
mask |= VisualDepthMask;
}
window->egl.visual = XGetVisualInfo(_glfw.x11.display,
mask, &info, &count);
if (window->egl.visual == NULL)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"EGL: Failed to retrieve visual for EGLConfig");
return GL_FALSE;
}
}
#endif // _GLFW_X11
if (wndconfig->clientAPI == GLFW_OPENGL_ES_API)
{
if (!eglBindAPI(EGL_OPENGL_ES_API))
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"EGL: OpenGL ES is not supported");
return GL_FALSE;
}
}
else
{
if (!eglBindAPI(EGL_OPENGL_API))
{
_glfwInputError(GLFW_PLATFORM_ERROR, "EGL: OpenGL is not supported");
return GL_FALSE;
}
}
if (_glfw.egl.KHR_create_context)
{
int index = 0, mask = 0, flags = 0, strategy = 0;
if (wndconfig->clientAPI == GLFW_OPENGL_API)
{
if (wndconfig->glProfile == GLFW_OPENGL_CORE_PROFILE)
mask |= EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR;
else if (wndconfig->glProfile == GLFW_OPENGL_COMPAT_PROFILE)
mask |= EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR;
if (wndconfig->glForward)
flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
if (wndconfig->glDebug)
flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;
}
if (wndconfig->glRobustness != GLFW_NO_ROBUSTNESS)
{
if (wndconfig->glRobustness == GLFW_NO_RESET_NOTIFICATION)
strategy = EGL_NO_RESET_NOTIFICATION_KHR;
else if (wndconfig->glRobustness == GLFW_LOSE_CONTEXT_ON_RESET)
strategy = EGL_LOSE_CONTEXT_ON_RESET_KHR;
flags |= EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR;
}
if (wndconfig->glMajor != 1 || wndconfig->glMinor != 0)
{
setEGLattrib(EGL_CONTEXT_MAJOR_VERSION_KHR, wndconfig->glMajor);
setEGLattrib(EGL_CONTEXT_MINOR_VERSION_KHR, wndconfig->glMinor);
}
if (mask)
setEGLattrib(EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR, mask);
if (flags)
setEGLattrib(EGL_CONTEXT_FLAGS_KHR, flags);
if (strategy)
setEGLattrib(EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR, strategy);
setEGLattrib(EGL_NONE, EGL_NONE);
}
else
{
int index = 0;
if (wndconfig->clientAPI == GLFW_OPENGL_ES_API)
setEGLattrib(EGL_CONTEXT_CLIENT_VERSION, wndconfig->glMajor);
setEGLattrib(EGL_NONE, EGL_NONE);
}
window->egl.context = eglCreateContext(_glfw.egl.display,
config, share, attribs);
if (window->egl.context == EGL_NO_CONTEXT)
{
// TODO: Handle all the various error codes here
_glfwInputError(GLFW_PLATFORM_ERROR, "EGL: Failed to create context");
return GL_FALSE;
}
window->egl.config = config;
return GL_TRUE;
}
// Create the OpenGL or OpenGL ES context
//
GLFWbool _glfwCreateContextEGL(_GLFWwindow* window,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig)
{
EGLint attribs[40];
EGLConfig config;
EGLContext share = NULL;
if (!_glfw.egl.display)
{
_glfwInputError(GLFW_API_UNAVAILABLE, "EGL: API not available");
return GLFW_FALSE;
}
if (ctxconfig->share)
share = ctxconfig->share->context.egl.handle;
if (!chooseFBConfigs(ctxconfig, fbconfig, &config))
{
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
"EGL: Failed to find a suitable EGLConfig");
return GLFW_FALSE;
}
if (ctxconfig->client == GLFW_OPENGL_ES_API)
{
if (!eglBindAPI(EGL_OPENGL_ES_API))
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"EGL: Failed to bind OpenGL ES: %s",
getErrorString(eglGetError()));
return GLFW_FALSE;
}
}
else
{
if (!eglBindAPI(EGL_OPENGL_API))
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"EGL: Failed to bind OpenGL: %s",
getErrorString(eglGetError()));
return GLFW_FALSE;
}
}
if (_glfw.egl.KHR_create_context)
{
int index = 0, mask = 0, flags = 0;
if (ctxconfig->client == GLFW_OPENGL_API)
{
if (ctxconfig->forward)
flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE)
mask |= EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR;
else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE)
mask |= EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR;
if (_glfw.egl.KHR_create_context_no_error)
{
if (ctxconfig->noerror)
flags |= EGL_CONTEXT_OPENGL_NO_ERROR_KHR;
}
}
if (ctxconfig->debug)
flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;
if (ctxconfig->robustness)
{
if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION)
{
setEGLattrib(EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR,
EGL_NO_RESET_NOTIFICATION_KHR);
}
else if (ctxconfig->robustness == GLFW_LOSE_CONTEXT_ON_RESET)
{
setEGLattrib(EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR,
EGL_LOSE_CONTEXT_ON_RESET_KHR);
}
flags |= EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR;
}
if (ctxconfig->major != 1 || ctxconfig->minor != 0)
{
setEGLattrib(EGL_CONTEXT_MAJOR_VERSION_KHR, ctxconfig->major);
setEGLattrib(EGL_CONTEXT_MINOR_VERSION_KHR, ctxconfig->minor);
}
if (mask)
setEGLattrib(EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR, mask);
if (flags)
setEGLattrib(EGL_CONTEXT_FLAGS_KHR, flags);
setEGLattrib(EGL_NONE, EGL_NONE);
}
else
{
int index = 0;
if (ctxconfig->client == GLFW_OPENGL_ES_API)
setEGLattrib(EGL_CONTEXT_CLIENT_VERSION, ctxconfig->major);
setEGLattrib(EGL_NONE, EGL_NONE);
}
// Context release behaviors (GL_KHR_context_flush_control) are not yet
// supported on EGL but are not a hard constraint, so ignore and continue
window->context.egl.handle = eglCreateContext(_glfw.egl.display,
config, share, attribs);
if (window->context.egl.handle == EGL_NO_CONTEXT)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"EGL: Failed to create context: %s",
getErrorString(eglGetError()));
return GLFW_FALSE;
}
// Set up attributes for surface creation
{
int index = 0;
if (fbconfig->sRGB)
{
if (_glfw.egl.KHR_gl_colorspace)
{
setEGLattrib(EGL_GL_COLORSPACE_KHR, EGL_GL_COLORSPACE_SRGB_KHR);
}
}
setEGLattrib(EGL_NONE, EGL_NONE);
}
// The surface for EGLDevice backened is created in _glfwPlatformCreateWindow
//
#if !defined (_GLFW_EGLDEVICE)
window->context.egl.surface =
eglCreateWindowSurface(_glfw.egl.display,
config,
_GLFW_EGL_NATIVE_WINDOW,
attribs);
if (window->context.egl.surface == EGL_NO_SURFACE)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"EGL: Failed to create window surface: %s",
getErrorString(eglGetError()));
return GLFW_FALSE;
}
#endif
window->context.egl.config = config;
// Load the appropriate client library
{
int i;
const char** sonames;
const char* es1sonames[] =
{
#if defined(_GLFW_WIN32)
"GLESv1_CM.dll",
"libGLES_CM.dll",
#elif defined(_GLFW_COCOA)
"libGLESv1_CM.dylib",
#else
"libGLESv1_CM.so.1",
"libGLES_CM.so.1",
#endif
NULL
};
const char* es2sonames[] =
{
#if defined(_GLFW_WIN32)
"GLESv2.dll",
"libGLESv2.dll",
#elif defined(_GLFW_COCOA)
"libGLESv2.dylib",
#else
"libGLESv2.so.2",
#endif
NULL
};
const char* glsonames[] =
{
#if defined(_GLFW_WIN32)
#elif defined(_GLFW_COCOA)
#else
"libGL.so.1",
#endif
NULL
};
if (ctxconfig->client == GLFW_OPENGL_ES_API)
{
if (ctxconfig->major == 1)
sonames = es1sonames;
else
sonames = es2sonames;
}
else
sonames = glsonames;
for (i = 0; sonames[i]; i++)
{
window->context.egl.client = _glfw_dlopen(sonames[i]);
if (window->context.egl.client)
break;
}
if (!window->context.egl.client)
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"EGL: Failed to load client library");
return GLFW_FALSE;
}
}
window->context.makeCurrent = makeContextCurrent;
window->context.swapBuffers = swapBuffers;
window->context.swapInterval = swapInterval;
window->context.extensionSupported = extensionSupported;
window->context.getProcAddress = getProcAddress;
window->context.destroy = destroyContext;
return GLFW_TRUE;
}
