mirror of
https://github.com/gwm17/glfw.git
synced 2024-11-23 10:48:51 -05:00
297 lines
9.1 KiB
Objective-C
297 lines
9.1 KiB
Objective-C
//========================================================================
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// GLFW - An OpenGL library
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// Platform: Cocoa/NSOpenGL
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// API Version: 3.0
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// WWW: http://www.glfw.org/
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//------------------------------------------------------------------------
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// Copyright (c) 2009-2010 Camilla Berglund <elmindreda@elmindreda.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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#include "internal.h"
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#include <pthread.h>
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//////////////////////////////////////////////////////////////////////////
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////// GLFW internal API //////
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//////////////////////////////////////////////////////////////////////////
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// Initialize OpenGL support
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//
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int _glfwInitContextAPI(void)
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{
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if (pthread_key_create(&_glfw.nsgl.current, NULL) != 0)
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"NSOpenGL: Failed to create context TLS");
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return GL_FALSE;
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}
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_glfw.nsgl.framework =
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CFBundleGetBundleWithIdentifier(CFSTR("com.apple.opengl"));
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if (_glfw.nsgl.framework == NULL)
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"NSGL: Failed to locate OpenGL framework");
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return GL_FALSE;
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}
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return GL_TRUE;
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}
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// Terminate OpenGL support
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//
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void _glfwTerminateContextAPI(void)
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{
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pthread_key_delete(_glfw.nsgl.current);
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}
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// Create the OpenGL context
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//
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int _glfwCreateContext(_GLFWwindow* window,
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const _GLFWwndconfig* wndconfig,
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const _GLFWfbconfig* fbconfig)
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{
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unsigned int attributeCount = 0;
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// Mac OS X needs non-zero color size, so set resonable values
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int colorBits = fbconfig->redBits + fbconfig->greenBits + fbconfig->blueBits;
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if (colorBits == 0)
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colorBits = 24;
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else if (colorBits < 15)
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colorBits = 15;
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if (wndconfig->clientAPI == GLFW_OPENGL_ES_API)
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{
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_glfwInputError(GLFW_VERSION_UNAVAILABLE,
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"NSOpenGL: This API does not support OpenGL ES");
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return GL_FALSE;
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}
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#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
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// Fail if any OpenGL version above 2.1 other than 3.2 was requested
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if (wndconfig->glMajor > 3 ||
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(wndconfig->glMajor == 3 && wndconfig->glMinor != 2))
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{
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_glfwInputError(GLFW_VERSION_UNAVAILABLE,
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"NSOpenGL: The targeted version of Mac OS X does not "
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"support any OpenGL version above 2.1 except 3.2");
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return GL_FALSE;
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}
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if (wndconfig->glMajor > 2)
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{
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if (!wndconfig->glForward)
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{
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_glfwInputError(GLFW_VERSION_UNAVAILABLE,
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"NSOpenGL: The targeted version of Mac OS X only "
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"supports OpenGL 3.2 contexts if they are "
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"forward-compatible");
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return GL_FALSE;
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}
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if (wndconfig->glProfile != GLFW_OPENGL_CORE_PROFILE)
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{
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_glfwInputError(GLFW_VERSION_UNAVAILABLE,
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"NSOpenGL: The targeted version of Mac OS X only "
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"supports OpenGL 3.2 contexts if they use the "
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"core profile");
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return GL_FALSE;
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}
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}
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#else
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// Fail if OpenGL 3.0 or above was requested
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if (wndconfig->glMajor > 2)
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{
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_glfwInputError(GLFW_VERSION_UNAVAILABLE,
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"NSOpenGL: The targeted version of Mac OS X does not "
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"support OpenGL version 3.0 or above");
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return GL_FALSE;
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}
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#endif /*MAC_OS_X_VERSION_MAX_ALLOWED*/
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// Fail if a robustness strategy was requested
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if (wndconfig->glRobustness)
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{
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_glfwInputError(GLFW_VERSION_UNAVAILABLE,
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"NSOpenGL: Mac OS X does not support OpenGL robustness "
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"strategies");
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return GL_FALSE;
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}
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#define ADD_ATTR(x) { attributes[attributeCount++] = x; }
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#define ADD_ATTR2(x, y) { ADD_ATTR(x); ADD_ATTR(y); }
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// Arbitrary array size here
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NSOpenGLPixelFormatAttribute attributes[40];
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ADD_ATTR(NSOpenGLPFADoubleBuffer);
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ADD_ATTR(NSOpenGLPFAClosestPolicy);
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#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
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if (wndconfig->glMajor > 2)
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ADD_ATTR2(NSOpenGLPFAOpenGLProfile, NSOpenGLProfileVersion3_2Core);
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#endif /*MAC_OS_X_VERSION_MAX_ALLOWED*/
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ADD_ATTR2(NSOpenGLPFAColorSize, colorBits);
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if (fbconfig->alphaBits > 0)
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ADD_ATTR2(NSOpenGLPFAAlphaSize, fbconfig->alphaBits);
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if (fbconfig->depthBits > 0)
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ADD_ATTR2(NSOpenGLPFADepthSize, fbconfig->depthBits);
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if (fbconfig->stencilBits > 0)
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ADD_ATTR2(NSOpenGLPFAStencilSize, fbconfig->stencilBits);
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int accumBits = fbconfig->accumRedBits + fbconfig->accumGreenBits +
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fbconfig->accumBlueBits + fbconfig->accumAlphaBits;
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if (accumBits > 0)
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ADD_ATTR2(NSOpenGLPFAAccumSize, accumBits);
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if (fbconfig->auxBuffers > 0)
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ADD_ATTR2(NSOpenGLPFAAuxBuffers, fbconfig->auxBuffers);
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if (fbconfig->stereo)
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ADD_ATTR(NSOpenGLPFAStereo);
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if (fbconfig->samples > 0)
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{
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ADD_ATTR2(NSOpenGLPFASampleBuffers, 1);
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ADD_ATTR2(NSOpenGLPFASamples, fbconfig->samples);
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}
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// NOTE: All NSOpenGLPixelFormats on the relevant cards support sRGB
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// frambuffer, so there's no need (and no way) to request it
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ADD_ATTR(0);
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#undef ADD_ATTR
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#undef ADD_ATTR2
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window->nsgl.pixelFormat =
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[[NSOpenGLPixelFormat alloc] initWithAttributes:attributes];
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if (window->nsgl.pixelFormat == nil)
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"NSOpenGL: Failed to create OpenGL pixel format");
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return GL_FALSE;
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}
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NSOpenGLContext* share = NULL;
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if (wndconfig->share)
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share = wndconfig->share->nsgl.context;
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window->nsgl.context =
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[[NSOpenGLContext alloc] initWithFormat:window->nsgl.pixelFormat
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shareContext:share];
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if (window->nsgl.context == nil)
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"NSOpenGL: Failed to create OpenGL context");
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return GL_FALSE;
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}
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return GL_TRUE;
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}
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// Destroy the OpenGL context
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//
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void _glfwDestroyContext(_GLFWwindow* window)
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{
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[window->nsgl.pixelFormat release];
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window->nsgl.pixelFormat = nil;
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[window->nsgl.context release];
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window->nsgl.context = nil;
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW platform API //////
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//////////////////////////////////////////////////////////////////////////
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void _glfwPlatformMakeContextCurrent(_GLFWwindow* window)
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{
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if (window)
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[window->nsgl.context makeCurrentContext];
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else
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[NSOpenGLContext clearCurrentContext];
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pthread_setspecific(_glfw.nsgl.current, window);
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}
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_GLFWwindow* _glfwPlatformGetCurrentContext(void)
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{
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return (_GLFWwindow*) pthread_getspecific(_glfw.nsgl.current);
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}
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void _glfwPlatformSwapBuffers(_GLFWwindow* window)
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{
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// ARP appears to be unnecessary, but this is future-proof
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[window->nsgl.context flushBuffer];
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}
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void _glfwPlatformSwapInterval(int interval)
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{
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_GLFWwindow* window = _glfwPlatformGetCurrentContext();
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GLint sync = interval;
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[window->nsgl.context setValues:&sync forParameter:NSOpenGLCPSwapInterval];
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}
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int _glfwPlatformExtensionSupported(const char* extension)
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{
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// There are no NSGL extensions
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return GL_FALSE;
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}
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GLFWglproc _glfwPlatformGetProcAddress(const char* procname)
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{
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CFStringRef symbolName = CFStringCreateWithCString(kCFAllocatorDefault,
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procname,
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kCFStringEncodingASCII);
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GLFWglproc symbol = CFBundleGetFunctionPointerForName(_glfw.nsgl.framework,
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symbolName);
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CFRelease(symbolName);
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return symbol;
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW native API //////
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//////////////////////////////////////////////////////////////////////////
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GLFWAPI id glfwGetNSGLContext(GLFWwindow* handle)
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{
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_GLFWwindow* window = (_GLFWwindow*) handle;
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_GLFW_REQUIRE_INIT_OR_RETURN(nil);
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return window->nsgl.context;
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}
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