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Diffstat (limited to 'ext/glfw/src/nsgl_context.m')
| -rw-r--r-- | ext/glfw/src/nsgl_context.m | 384 |
1 files changed, 384 insertions, 0 deletions
diff --git a/ext/glfw/src/nsgl_context.m b/ext/glfw/src/nsgl_context.m new file mode 100644 index 0000000..df72980 --- /dev/null +++ b/ext/glfw/src/nsgl_context.m @@ -0,0 +1,384 @@ +//======================================================================== +// GLFW 3.5 macOS - www.glfw.org +//------------------------------------------------------------------------ +// Copyright (c) 2009-2019 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. +// +//======================================================================== + +#include "internal.h" + +#if defined(_GLFW_COCOA) + +#include <unistd.h> +#include <math.h> +#include <assert.h> + +static void makeContextCurrentNSGL(_GLFWwindow* window) +{ + @autoreleasepool { + + if (window) + [window->context.nsgl.object makeCurrentContext]; + else + [NSOpenGLContext clearCurrentContext]; + + _glfwPlatformSetTls(&_glfw.contextSlot, window); + + } // autoreleasepool +} + +static void swapBuffersNSGL(_GLFWwindow* window) +{ + @autoreleasepool { + + // HACK: Simulate vsync with usleep as NSGL swap interval does not apply to + // windows with a non-visible occlusion state + if (window->ns.occluded) + { + int interval = 0; + [window->context.nsgl.object getValues:&interval + forParameter:NSOpenGLContextParameterSwapInterval]; + + if (interval > 0) + { + const double framerate = 60.0; + const uint64_t frequency = _glfwPlatformGetTimerFrequency(); + const uint64_t value = _glfwPlatformGetTimerValue(); + + const double elapsed = value / (double) frequency; + const double period = 1.0 / framerate; + const double delay = period - fmod(elapsed, period); + + usleep(floorl(delay * 1e6)); + } + } + + [window->context.nsgl.object flushBuffer]; + + } // autoreleasepool +} + +static void swapIntervalNSGL(int interval) +{ + @autoreleasepool { + + _GLFWwindow* window = _glfwPlatformGetTls(&_glfw.contextSlot); + assert(window != NULL); + + [window->context.nsgl.object setValues:&interval + forParameter:NSOpenGLContextParameterSwapInterval]; + + } // autoreleasepool +} + +static int extensionSupportedNSGL(const char* extension) +{ + // There are no NSGL extensions + return GLFW_FALSE; +} + +static GLFWglproc getProcAddressNSGL(const char* procname) +{ + CFStringRef symbolName = CFStringCreateWithCString(kCFAllocatorDefault, + procname, + kCFStringEncodingASCII); + + GLFWglproc symbol = CFBundleGetFunctionPointerForName(_glfw.nsgl.framework, + symbolName); + + CFRelease(symbolName); + + return symbol; +} + +static void destroyContextNSGL(_GLFWwindow* window) +{ + @autoreleasepool { + + [window->context.nsgl.pixelFormat release]; + window->context.nsgl.pixelFormat = nil; + + [window->context.nsgl.object release]; + window->context.nsgl.object = nil; + + } // autoreleasepool +} + + +////////////////////////////////////////////////////////////////////////// +////// GLFW internal API ////// +////////////////////////////////////////////////////////////////////////// + +// Initialize OpenGL support +// +GLFWbool _glfwInitNSGL(void) +{ + if (_glfw.nsgl.framework) + return GLFW_TRUE; + + _glfw.nsgl.framework = + CFBundleGetBundleWithIdentifier(CFSTR("com.apple.opengl")); + if (_glfw.nsgl.framework == NULL) + { + _glfwInputError(GLFW_API_UNAVAILABLE, + "NSGL: Failed to locate OpenGL framework"); + return GLFW_FALSE; + } + + return GLFW_TRUE; +} + +// Terminate OpenGL support +// +void _glfwTerminateNSGL(void) +{ +} + +// Create the OpenGL context +// +GLFWbool _glfwCreateContextNSGL(_GLFWwindow* window, + const _GLFWctxconfig* ctxconfig, + const _GLFWfbconfig* fbconfig) +{ + if (ctxconfig->client == GLFW_OPENGL_ES_API) + { + _glfwInputError(GLFW_API_UNAVAILABLE, + "NSGL: OpenGL ES is not available via NSGL"); + return GLFW_FALSE; + } + + if (ctxconfig->major > 2) + { + if (ctxconfig->major == 3 && ctxconfig->minor < 2) + { + _glfwInputError(GLFW_VERSION_UNAVAILABLE, + "NSGL: The targeted version of macOS does not support OpenGL 3.0 or 3.1 but may support 3.2 and above"); + return GLFW_FALSE; + } + } + + if (ctxconfig->major >= 3 && ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE) + { + _glfwInputError(GLFW_VERSION_UNAVAILABLE, + "NSGL: The compatibility profile is not available on macOS"); + return GLFW_FALSE; + } + + // Context robustness modes (GL_KHR_robustness) are not supported by + // macOS but are not a hard constraint, so ignore and continue + + // Context release behaviors (GL_KHR_context_flush_control) are not + // supported by macOS but are not a hard constraint, so ignore and continue + + // Debug contexts (GL_KHR_debug) are not supported by macOS but are not + // a hard constraint, so ignore and continue + + // No-error contexts (GL_KHR_no_error) are not supported by macOS but + // are not a hard constraint, so ignore and continue + +#define ADD_ATTRIB(a) \ +{ \ + assert((size_t) index < sizeof(attribs) / sizeof(attribs[0])); \ + attribs[index++] = a; \ +} +#define SET_ATTRIB(a, v) { ADD_ATTRIB(a); ADD_ATTRIB(v); } + + NSOpenGLPixelFormatAttribute attribs[40]; + int index = 0; + + ADD_ATTRIB(NSOpenGLPFAAccelerated); + ADD_ATTRIB(NSOpenGLPFAClosestPolicy); + + if (ctxconfig->nsgl.offline) + { + ADD_ATTRIB(NSOpenGLPFAAllowOfflineRenderers); + // NOTE: This replaces the NSSupportsAutomaticGraphicsSwitching key in + // Info.plist for unbundled applications + // HACK: This assumes that NSOpenGLPixelFormat will remain + // a straightforward wrapper of its CGL counterpart + ADD_ATTRIB(kCGLPFASupportsAutomaticGraphicsSwitching); + } + + if (ctxconfig->major >= 4) + { + SET_ATTRIB(NSOpenGLPFAOpenGLProfile, NSOpenGLProfileVersion4_1Core); + } + else if (ctxconfig->major >= 3) + { + SET_ATTRIB(NSOpenGLPFAOpenGLProfile, NSOpenGLProfileVersion3_2Core); + } + + if (ctxconfig->major <= 2) + { + if (fbconfig->auxBuffers != GLFW_DONT_CARE) + SET_ATTRIB(NSOpenGLPFAAuxBuffers, fbconfig->auxBuffers); + + if (fbconfig->accumRedBits != GLFW_DONT_CARE && + fbconfig->accumGreenBits != GLFW_DONT_CARE && + fbconfig->accumBlueBits != GLFW_DONT_CARE && + fbconfig->accumAlphaBits != GLFW_DONT_CARE) + { + const int accumBits = fbconfig->accumRedBits + + fbconfig->accumGreenBits + + fbconfig->accumBlueBits + + fbconfig->accumAlphaBits; + + SET_ATTRIB(NSOpenGLPFAAccumSize, accumBits); + } + } + + if (fbconfig->redBits != GLFW_DONT_CARE && + fbconfig->greenBits != GLFW_DONT_CARE && + fbconfig->blueBits != GLFW_DONT_CARE) + { + int colorBits = fbconfig->redBits + + fbconfig->greenBits + + fbconfig->blueBits; + + // macOS needs non-zero color size, so set reasonable values + if (colorBits == 0) + colorBits = 24; + else if (colorBits < 15) + colorBits = 15; + + SET_ATTRIB(NSOpenGLPFAColorSize, colorBits); + } + + if (fbconfig->alphaBits != GLFW_DONT_CARE) + SET_ATTRIB(NSOpenGLPFAAlphaSize, fbconfig->alphaBits); + + if (fbconfig->depthBits != GLFW_DONT_CARE) + SET_ATTRIB(NSOpenGLPFADepthSize, fbconfig->depthBits); + + if (fbconfig->stencilBits != GLFW_DONT_CARE) + SET_ATTRIB(NSOpenGLPFAStencilSize, fbconfig->stencilBits); + + if (fbconfig->stereo) + { +#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101200 + _glfwInputError(GLFW_FORMAT_UNAVAILABLE, + "NSGL: Stereo rendering is deprecated"); + return GLFW_FALSE; +#else + ADD_ATTRIB(NSOpenGLPFAStereo); +#endif + } + + if (fbconfig->doublebuffer) + ADD_ATTRIB(NSOpenGLPFADoubleBuffer); + + if (fbconfig->samples != GLFW_DONT_CARE) + { + if (fbconfig->samples == 0) + { + SET_ATTRIB(NSOpenGLPFASampleBuffers, 0); + } + else + { + SET_ATTRIB(NSOpenGLPFASampleBuffers, 1); + SET_ATTRIB(NSOpenGLPFASamples, fbconfig->samples); + } + } + + // NOTE: All NSOpenGLPixelFormats on the relevant cards support sRGB + // framebuffer, so there's no need (and no way) to request it + + ADD_ATTRIB(0); + +#undef ADD_ATTRIB +#undef SET_ATTRIB + + window->context.nsgl.pixelFormat = + [[NSOpenGLPixelFormat alloc] initWithAttributes:attribs]; + if (window->context.nsgl.pixelFormat == nil) + { + _glfwInputError(GLFW_FORMAT_UNAVAILABLE, + "NSGL: Failed to find a suitable pixel format"); + return GLFW_FALSE; + } + + NSOpenGLContext* share = nil; + + if (ctxconfig->share) + share = ctxconfig->share->context.nsgl.object; + + window->context.nsgl.object = + [[NSOpenGLContext alloc] initWithFormat:window->context.nsgl.pixelFormat + shareContext:share]; + if (window->context.nsgl.object == nil) + { + _glfwInputError(GLFW_VERSION_UNAVAILABLE, + "NSGL: Failed to create OpenGL context"); + return GLFW_FALSE; + } + + if (fbconfig->transparent) + { + GLint opaque = 0; + [window->context.nsgl.object setValues:&opaque + forParameter:NSOpenGLContextParameterSurfaceOpacity]; + } + + [window->ns.view setWantsBestResolutionOpenGLSurface:window->ns.scaleFramebuffer]; + + [window->context.nsgl.object setView:window->ns.view]; + + window->context.makeCurrent = makeContextCurrentNSGL; + window->context.swapBuffers = swapBuffersNSGL; + window->context.swapInterval = swapIntervalNSGL; + window->context.extensionSupported = extensionSupportedNSGL; + window->context.getProcAddress = getProcAddressNSGL; + window->context.destroy = destroyContextNSGL; + + return GLFW_TRUE; +} + + +////////////////////////////////////////////////////////////////////////// +////// GLFW native API ////// +////////////////////////////////////////////////////////////////////////// + +GLFWAPI id glfwGetNSGLContext(GLFWwindow* handle) +{ + _GLFW_REQUIRE_INIT_OR_RETURN(nil); + + if (_glfw.platform.platformID != GLFW_PLATFORM_COCOA) + { + _glfwInputError(GLFW_PLATFORM_UNAVAILABLE, + "NSGL: Platform not initialized"); + return nil; + } + + _GLFWwindow* window = (_GLFWwindow*) handle; + assert(window != NULL); + + if (window->context.source != GLFW_NATIVE_CONTEXT_API) + { + _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL); + return nil; + } + + return window->context.nsgl.object; +} + +#endif // _GLFW_COCOA + |