787 lines
27 KiB
C
787 lines
27 KiB
C
//========================================================================
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// GLFW - An OpenGL library
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// Platform: X11/GLX
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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) 2002-2006 Marcus Geelnard
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// Copyright (c) 2006-2010 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 <string.h>
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#include <stdlib.h>
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// This is the only glXGetProcAddress variant not declared by glxext.h
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void (*glXGetProcAddressEXT(const GLubyte* procName))();
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//========================================================================
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// Returns the specified attribute of the specified GLXFBConfig
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// NOTE: Do not call this unless we have found GLX 1.3+ or GLX_SGIX_fbconfig
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//========================================================================
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static int getFBConfigAttrib(_GLFWwindow* window, GLXFBConfig fbconfig, int attrib)
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{
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int value;
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if (_glfwLibrary.GLX.SGIX_fbconfig)
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{
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_glfwLibrary.GLX.GetFBConfigAttribSGIX(_glfwLibrary.X11.display,
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fbconfig, attrib, &value);
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}
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else
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glXGetFBConfigAttrib(_glfwLibrary.X11.display, fbconfig, attrib, &value);
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return value;
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}
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//========================================================================
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// Return a list of available and usable framebuffer configs
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//========================================================================
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static _GLFWfbconfig* getFBConfigs(_GLFWwindow* window, unsigned int* found)
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{
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GLXFBConfig* fbconfigs;
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_GLFWfbconfig* result;
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int i, count = 0;
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const char* vendor;
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GLboolean trustWindowBit = GL_TRUE;
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*found = 0;
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if (_glfwLibrary.GLX.majorVersion == 1 && _glfwLibrary.GLX.minorVersion < 3)
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{
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if (!_glfwLibrary.GLX.SGIX_fbconfig)
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{
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_glfwSetError(GLFW_OPENGL_UNAVAILABLE,
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"X11/GLX: GLXFBConfig support not found");
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return NULL;
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}
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}
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vendor = glXGetClientString(_glfwLibrary.X11.display, GLX_VENDOR);
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if (strcmp(vendor, "Chromium") == 0)
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{
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// This is a (hopefully temporary) workaround for Chromium (VirtualBox
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// GL) not setting the window bit on any GLXFBConfigs
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trustWindowBit = GL_FALSE;
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}
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if (_glfwLibrary.GLX.SGIX_fbconfig)
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{
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fbconfigs = _glfwLibrary.GLX.ChooseFBConfigSGIX(_glfwLibrary.X11.display,
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_glfwLibrary.X11.screen,
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NULL,
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&count);
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if (!count)
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{
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_glfwSetError(GLFW_OPENGL_UNAVAILABLE,
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"X11/GLX: No GLXFBConfigs returned");
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return NULL;
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}
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}
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else
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{
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fbconfigs = glXGetFBConfigs(_glfwLibrary.X11.display,
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_glfwLibrary.X11.screen,
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&count);
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if (!count)
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{
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_glfwSetError(GLFW_OPENGL_UNAVAILABLE,
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"X11/GLX: No GLXFBConfigs returned");
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return NULL;
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}
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}
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result = (_GLFWfbconfig*) malloc(sizeof(_GLFWfbconfig) * count);
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if (!result)
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{
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_glfwSetError(GLFW_OUT_OF_MEMORY,
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"X11/GLX: Failed to allocate _GLFWfbconfig array");
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return NULL;
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}
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for (i = 0; i < count; i++)
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{
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_GLFWfbconfig* f = result + *found;
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if (!getFBConfigAttrib(window, fbconfigs[i], GLX_DOUBLEBUFFER) ||
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!getFBConfigAttrib(window, fbconfigs[i], GLX_VISUAL_ID))
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{
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// Only consider double-buffered GLXFBConfigs with associated visuals
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continue;
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}
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if (!(getFBConfigAttrib(window,
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fbconfigs[i],
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GLX_RENDER_TYPE) & GLX_RGBA_BIT))
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{
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// Only consider RGBA GLXFBConfigs
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continue;
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}
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if (!(getFBConfigAttrib(window, fbconfigs[i], GLX_DRAWABLE_TYPE) & GLX_WINDOW_BIT))
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{
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if (trustWindowBit)
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{
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// Only consider window GLXFBConfigs
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continue;
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}
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}
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f->redBits = getFBConfigAttrib(window, fbconfigs[i], GLX_RED_SIZE);
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f->greenBits = getFBConfigAttrib(window, fbconfigs[i], GLX_GREEN_SIZE);
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f->blueBits = getFBConfigAttrib(window, fbconfigs[i], GLX_BLUE_SIZE);
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f->alphaBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ALPHA_SIZE);
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f->depthBits = getFBConfigAttrib(window, fbconfigs[i], GLX_DEPTH_SIZE);
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f->stencilBits = getFBConfigAttrib(window, fbconfigs[i], GLX_STENCIL_SIZE);
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f->accumRedBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ACCUM_RED_SIZE);
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f->accumGreenBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ACCUM_GREEN_SIZE);
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f->accumBlueBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ACCUM_BLUE_SIZE);
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f->accumAlphaBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ACCUM_ALPHA_SIZE);
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f->auxBuffers = getFBConfigAttrib(window, fbconfigs[i], GLX_AUX_BUFFERS);
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f->stereo = getFBConfigAttrib(window, fbconfigs[i], GLX_STEREO);
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if (_glfwLibrary.GLX.ARB_multisample)
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f->samples = getFBConfigAttrib(window, fbconfigs[i], GLX_SAMPLES);
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else
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f->samples = 0;
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f->platformID = (GLFWintptr) getFBConfigAttrib(window, fbconfigs[i], GLX_FBCONFIG_ID);
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(*found)++;
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}
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XFree(fbconfigs);
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return result;
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}
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//========================================================================
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// Error handler for BadMatch errors when requesting context with
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// unavailable OpenGL versions using the GLX_ARB_create_context extension
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//========================================================================
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static int errorHandler(Display *display, XErrorEvent* event)
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{
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return 0;
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}
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//========================================================================
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// Read back framebuffer parameters from the context
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//========================================================================
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static void refreshContextParams(_GLFWwindow* window, GLXFBConfigID fbconfigID)
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{
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int dummy;
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GLXFBConfig* fbconfig;
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int attribs[] = { GLX_FBCONFIG_ID, fbconfigID, None };
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if (_glfwLibrary.GLX.SGIX_fbconfig)
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{
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fbconfig = _glfwLibrary.GLX.ChooseFBConfigSGIX(_glfwLibrary.X11.display,
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_glfwLibrary.X11.screen,
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attribs,
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&dummy);
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}
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else
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{
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fbconfig = glXChooseFBConfig(_glfwLibrary.X11.display,
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_glfwLibrary.X11.screen,
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attribs,
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&dummy);
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}
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if (fbconfig == NULL)
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{
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// This should never ever happen
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// TODO: Flag this as an error and propagate up
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_glfwSetError(GLFW_PLATFORM_ERROR, "X11/GLX: Cannot find known "
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"GLXFBConfig by ID. This cannot "
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"happen. Have a nice day.\n");
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abort();
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}
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// There is no clear definition of an "accelerated" context on X11/GLX, and
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// true sounds better than false, so we hardcode true here
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window->accelerated = GL_TRUE;
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window->redBits = getFBConfigAttrib(window, *fbconfig, GLX_RED_SIZE);
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window->greenBits = getFBConfigAttrib(window, *fbconfig, GLX_GREEN_SIZE);
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window->blueBits = getFBConfigAttrib(window, *fbconfig, GLX_BLUE_SIZE);
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window->alphaBits = getFBConfigAttrib(window, *fbconfig, GLX_ALPHA_SIZE);
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window->depthBits = getFBConfigAttrib(window, *fbconfig, GLX_DEPTH_SIZE);
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window->stencilBits = getFBConfigAttrib(window, *fbconfig, GLX_STENCIL_SIZE);
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window->accumRedBits = getFBConfigAttrib(window, *fbconfig, GLX_ACCUM_RED_SIZE);
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window->accumGreenBits = getFBConfigAttrib(window, *fbconfig, GLX_ACCUM_GREEN_SIZE);
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window->accumBlueBits = getFBConfigAttrib(window, *fbconfig, GLX_ACCUM_BLUE_SIZE);
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window->accumAlphaBits = getFBConfigAttrib(window, *fbconfig, GLX_ACCUM_ALPHA_SIZE);
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window->auxBuffers = getFBConfigAttrib(window, *fbconfig, GLX_AUX_BUFFERS);
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window->stereo = getFBConfigAttrib(window, *fbconfig, GLX_STEREO) ? GL_TRUE : GL_FALSE;
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// Get FSAA buffer sample count
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if (_glfwLibrary.GLX.ARB_multisample)
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window->samples = getFBConfigAttrib(window, *fbconfig, GLX_SAMPLES);
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else
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window->samples = 0;
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XFree(fbconfig);
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}
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//========================================================================
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// Create the actual OpenGL context
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//========================================================================
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#define setGLXattrib(attribs, index, attribName, attribValue) \
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attribs[index++] = attribName; \
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attribs[index++] = attribValue;
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static int createContext(_GLFWwindow* window,
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const _GLFWwndconfig* wndconfig,
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GLXFBConfigID fbconfigID)
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{
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int attribs[40];
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int dummy, index;
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GLXFBConfig* fbconfig;
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GLXContext share = NULL;
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if (wndconfig->share)
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share = wndconfig->share->GLX.context;
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// Retrieve the previously selected GLXFBConfig
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{
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index = 0;
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setGLXattrib(attribs, index, GLX_FBCONFIG_ID, (int) fbconfigID);
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setGLXattrib(attribs, index, None, None);
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if (_glfwLibrary.GLX.SGIX_fbconfig)
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{
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fbconfig = _glfwLibrary.GLX.ChooseFBConfigSGIX(_glfwLibrary.X11.display,
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_glfwLibrary.X11.screen,
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attribs,
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&dummy);
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}
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else
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{
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fbconfig = glXChooseFBConfig(_glfwLibrary.X11.display,
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_glfwLibrary.X11.screen,
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attribs,
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&dummy);
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}
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if (fbconfig == NULL)
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{
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_glfwSetError(GLFW_PLATFORM_ERROR,
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"X11/GLX: Failed to retrieve the selected GLXFBConfig");
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return GL_FALSE;
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}
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}
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// Retrieve the corresponding visual
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if (_glfwLibrary.GLX.SGIX_fbconfig)
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{
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window->GLX.visual = _glfwLibrary.GLX.GetVisualFromFBConfigSGIX(_glfwLibrary.X11.display,
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*fbconfig);
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}
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else
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{
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window->GLX.visual = glXGetVisualFromFBConfig(_glfwLibrary.X11.display,
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*fbconfig);
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}
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if (window->GLX.visual == NULL)
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{
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XFree(fbconfig);
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_glfwSetError(GLFW_PLATFORM_ERROR,
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"X11/GLX: Failed to retrieve visual for GLXFBConfig");
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return GL_FALSE;
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}
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if (_glfwLibrary.GLX.ARB_create_context)
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{
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index = 0;
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if (wndconfig->glMajor != 1 || wndconfig->glMinor != 0)
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{
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// Request an explicitly versioned context
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setGLXattrib(attribs, index, GLX_CONTEXT_MAJOR_VERSION_ARB, wndconfig->glMajor);
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setGLXattrib(attribs, index, GLX_CONTEXT_MINOR_VERSION_ARB, wndconfig->glMinor);
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}
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if (wndconfig->glForward || wndconfig->glDebug || wndconfig->glRobustness)
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{
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int flags = 0;
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if (wndconfig->glForward)
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flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
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if (wndconfig->glDebug)
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flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
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if (wndconfig->glRobustness)
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flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB;
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setGLXattrib(attribs, index, GLX_CONTEXT_FLAGS_ARB, flags);
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}
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if (wndconfig->glProfile)
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{
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int flags = 0;
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if (!_glfwLibrary.GLX.ARB_create_context_profile)
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{
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_glfwSetError(GLFW_VERSION_UNAVAILABLE,
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"X11/GLX: An OpenGL profile requested but "
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"GLX_ARB_create_context_profile is unavailable");
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return GL_FALSE;
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}
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if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE &&
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!_glfwLibrary.GLX.EXT_create_context_es2_profile)
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{
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_glfwSetError(GLFW_VERSION_UNAVAILABLE,
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"X11/GLX: OpenGL ES 2.x profile requested but "
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"GLX_EXT_create_context_es2_profile is unavailable");
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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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flags = GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
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else if (wndconfig->glProfile == GLFW_OPENGL_COMPAT_PROFILE)
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flags = GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
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else if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE)
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flags = GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
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setGLXattrib(attribs, index, GLX_CONTEXT_PROFILE_MASK_ARB, flags);
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}
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if (wndconfig->glRobustness)
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{
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int strategy;
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if (!_glfwLibrary.GLX.ARB_create_context_robustness)
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{
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_glfwSetError(GLFW_VERSION_UNAVAILABLE,
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"X11/GLX: An OpenGL robustness strategy was "
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"requested but GLX_ARB_create_context_robustness "
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"is unavailable");
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return GL_FALSE;
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}
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if (wndconfig->glRobustness == GLFW_OPENGL_NO_RESET_NOTIFICATION)
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strategy = GLX_NO_RESET_NOTIFICATION_ARB;
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else if (wndconfig->glRobustness == GLFW_OPENGL_LOSE_CONTEXT_ON_RESET)
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strategy = GLX_LOSE_CONTEXT_ON_RESET_ARB;
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setGLXattrib(attribs,
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index,
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GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
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strategy);
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}
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setGLXattrib(attribs, index, None, None);
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|
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// This is the only place we set an Xlib error handler, and we only do
|
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// it because glXCreateContextAttribsARB generates a BadMatch error if
|
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// the requested OpenGL version is unavailable (instead of a civilized
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// response like returning NULL)
|
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XSetErrorHandler(errorHandler);
|
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|
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window->GLX.context =
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_glfwLibrary.GLX.CreateContextAttribsARB(_glfwLibrary.X11.display,
|
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*fbconfig,
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share,
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True,
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attribs);
|
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|
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// We are done, so unset the error handler again (see above)
|
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XSetErrorHandler(NULL);
|
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}
|
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else
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{
|
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if (_glfwLibrary.GLX.SGIX_fbconfig)
|
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{
|
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window->GLX.context =
|
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_glfwLibrary.GLX.CreateContextWithConfigSGIX(_glfwLibrary.X11.display,
|
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*fbconfig,
|
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GLX_RGBA_TYPE,
|
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share,
|
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True);
|
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}
|
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else
|
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{
|
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window->GLX.context = glXCreateNewContext(_glfwLibrary.X11.display,
|
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*fbconfig,
|
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GLX_RGBA_TYPE,
|
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share,
|
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True);
|
|
}
|
|
}
|
|
|
|
XFree(fbconfig);
|
|
|
|
if (window->GLX.context == NULL)
|
|
{
|
|
// TODO: Handle all the various error codes here
|
|
|
|
_glfwSetError(GLFW_PLATFORM_ERROR,
|
|
"X11/GLX: Failed to create OpenGL context");
|
|
return GL_FALSE;
|
|
}
|
|
|
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refreshContextParams(window, fbconfigID);
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|
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return GL_TRUE;
|
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}
|
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|
|
#undef setGLXattrib
|
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|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
////// GLFW internal API //////
|
|
//////////////////////////////////////////////////////////////////////////
|
|
|
|
//========================================================================
|
|
// Initialize GLX
|
|
//========================================================================
|
|
|
|
int _glfwInitOpenGL(void)
|
|
{
|
|
#ifdef _GLFW_DLOPEN_LIBGL
|
|
int i;
|
|
char* libGL_names[ ] =
|
|
{
|
|
"libGL.so",
|
|
"libGL.so.1",
|
|
"/usr/lib/libGL.so",
|
|
"/usr/lib/libGL.so.1",
|
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NULL
|
|
};
|
|
|
|
for (i = 0; libGL_names[i] != NULL; i++)
|
|
{
|
|
_glfwLibrary.GLX.libGL = dlopen(libGL_names[i], RTLD_LAZY | RTLD_GLOBAL);
|
|
if (_glfwLibrary.GLX.libGL)
|
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break;
|
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}
|
|
|
|
if (!_glfwLibrary.GLX.libGL)
|
|
{
|
|
_glfwSetError(GLFW_PLATFORM_ERROR, "X11/GLX: Failed to find libGL");
|
|
return GL_FALSE;
|
|
}
|
|
#endif
|
|
|
|
// Check if GLX is supported on this display
|
|
if (!glXQueryExtension(_glfwLibrary.X11.display, NULL, NULL))
|
|
{
|
|
_glfwSetError(GLFW_OPENGL_UNAVAILABLE, "X11/GLX: GLX supported not found");
|
|
return GL_FALSE;
|
|
}
|
|
|
|
if (!glXQueryVersion(_glfwLibrary.X11.display,
|
|
&_glfwLibrary.GLX.majorVersion,
|
|
&_glfwLibrary.GLX.minorVersion))
|
|
{
|
|
_glfwSetError(GLFW_OPENGL_UNAVAILABLE,
|
|
"X11/GLX: Failed to query GLX version");
|
|
return GL_FALSE;
|
|
}
|
|
|
|
if (_glfwPlatformExtensionSupported("GLX_EXT_swap_control"))
|
|
{
|
|
_glfwLibrary.GLX.SwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)
|
|
_glfwPlatformGetProcAddress("glXSwapIntervalEXT");
|
|
|
|
if (_glfwLibrary.GLX.SwapIntervalEXT)
|
|
_glfwLibrary.GLX.EXT_swap_control = GL_TRUE;
|
|
}
|
|
|
|
if (_glfwPlatformExtensionSupported("GLX_SGI_swap_control"))
|
|
{
|
|
_glfwLibrary.GLX.SwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)
|
|
_glfwPlatformGetProcAddress("glXSwapIntervalSGI");
|
|
|
|
if (_glfwLibrary.GLX.SwapIntervalSGI)
|
|
_glfwLibrary.GLX.SGI_swap_control = GL_TRUE;
|
|
}
|
|
|
|
if (_glfwPlatformExtensionSupported("GLX_MESA_swap_control"))
|
|
{
|
|
_glfwLibrary.GLX.SwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC)
|
|
_glfwPlatformGetProcAddress("glXSwapIntervalMESA");
|
|
|
|
if (_glfwLibrary.GLX.SwapIntervalMESA)
|
|
_glfwLibrary.GLX.MESA_swap_control = GL_TRUE;
|
|
}
|
|
|
|
if (_glfwPlatformExtensionSupported("GLX_SGIX_fbconfig"))
|
|
{
|
|
_glfwLibrary.GLX.GetFBConfigAttribSGIX = (PFNGLXGETFBCONFIGATTRIBSGIXPROC)
|
|
_glfwPlatformGetProcAddress("glXGetFBConfigAttribSGIX");
|
|
_glfwLibrary.GLX.ChooseFBConfigSGIX = (PFNGLXCHOOSEFBCONFIGSGIXPROC)
|
|
_glfwPlatformGetProcAddress("glXChooseFBConfigSGIX");
|
|
_glfwLibrary.GLX.CreateContextWithConfigSGIX = (PFNGLXCREATECONTEXTWITHCONFIGSGIXPROC)
|
|
_glfwPlatformGetProcAddress("glXCreateContextWithConfigSGIX");
|
|
_glfwLibrary.GLX.GetVisualFromFBConfigSGIX = (PFNGLXGETVISUALFROMFBCONFIGSGIXPROC)
|
|
_glfwPlatformGetProcAddress("glXGetVisualFromFBConfigSGIX");
|
|
|
|
if (_glfwLibrary.GLX.GetFBConfigAttribSGIX &&
|
|
_glfwLibrary.GLX.ChooseFBConfigSGIX &&
|
|
_glfwLibrary.GLX.CreateContextWithConfigSGIX &&
|
|
_glfwLibrary.GLX.GetVisualFromFBConfigSGIX)
|
|
{
|
|
_glfwLibrary.GLX.SGIX_fbconfig = GL_TRUE;
|
|
}
|
|
}
|
|
|
|
if (_glfwPlatformExtensionSupported("GLX_ARB_multisample"))
|
|
_glfwLibrary.GLX.ARB_multisample = GL_TRUE;
|
|
|
|
if (_glfwPlatformExtensionSupported("GLX_ARB_create_context"))
|
|
{
|
|
_glfwLibrary.GLX.CreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC)
|
|
_glfwPlatformGetProcAddress("glXCreateContextAttribsARB");
|
|
|
|
if (_glfwLibrary.GLX.CreateContextAttribsARB)
|
|
_glfwLibrary.GLX.ARB_create_context = GL_TRUE;
|
|
}
|
|
|
|
if (_glfwPlatformExtensionSupported("GLX_ARB_create_context_robustness"))
|
|
_glfwLibrary.GLX.ARB_create_context_robustness = GL_TRUE;
|
|
|
|
if (_glfwPlatformExtensionSupported("GLX_ARB_create_context_profile"))
|
|
_glfwLibrary.GLX.ARB_create_context_profile = GL_TRUE;
|
|
|
|
if (_glfwPlatformExtensionSupported("GLX_EXT_create_context_es2_profile"))
|
|
_glfwLibrary.GLX.EXT_create_context_es2_profile = GL_TRUE;
|
|
|
|
return GL_TRUE;
|
|
}
|
|
|
|
|
|
//========================================================================
|
|
// Terminate GLX
|
|
//========================================================================
|
|
|
|
void _glfwTerminateOpenGL(void)
|
|
{
|
|
// Unload libGL.so if necessary
|
|
#ifdef _GLFW_DLOPEN_LIBGL
|
|
if (_glfwLibrary.GLX.libGL != NULL)
|
|
{
|
|
dlclose(_glfwLibrary.GLX.libGL);
|
|
_glfwLibrary.GLX.libGL = NULL;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
//========================================================================
|
|
// Prepare for creation of the OpenGL context
|
|
//========================================================================
|
|
|
|
int _glfwCreateContext(_GLFWwindow* window,
|
|
const _GLFWwndconfig* wndconfig,
|
|
const _GLFWfbconfig* fbconfig)
|
|
{
|
|
_GLFWfbconfig closest;
|
|
|
|
// Choose the best available fbconfig
|
|
{
|
|
unsigned int fbcount;
|
|
_GLFWfbconfig* fbconfigs;
|
|
const _GLFWfbconfig* result;
|
|
|
|
fbconfigs = getFBConfigs(window, &fbcount);
|
|
if (!fbconfigs)
|
|
{
|
|
_glfwSetError(GLFW_PLATFORM_ERROR,
|
|
"X11/GLX: No usable GLXFBConfigs found");
|
|
return GL_FALSE;
|
|
}
|
|
|
|
result = _glfwChooseFBConfig(fbconfig, fbconfigs, fbcount);
|
|
if (!result)
|
|
{
|
|
_glfwSetError(GLFW_PLATFORM_ERROR,
|
|
"X11/GLX: No GLXFBConfig matched the criteria");
|
|
|
|
free(fbconfigs);
|
|
return GL_FALSE;
|
|
}
|
|
|
|
closest = *result;
|
|
free(fbconfigs);
|
|
}
|
|
|
|
return createContext(window, wndconfig, closest.platformID);
|
|
}
|
|
|
|
|
|
//========================================================================
|
|
// Destroy the OpenGL context
|
|
//========================================================================
|
|
|
|
void _glfwDestroyContext(_GLFWwindow* window)
|
|
{
|
|
if (window->GLX.visual)
|
|
{
|
|
XFree(window->GLX.visual);
|
|
window->GLX.visual = NULL;
|
|
}
|
|
|
|
if (window->GLX.context)
|
|
{
|
|
// Release and destroy the context
|
|
glXMakeCurrent(_glfwLibrary.X11.display, None, NULL);
|
|
glXDestroyContext(_glfwLibrary.X11.display, window->GLX.context);
|
|
window->GLX.context = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
//========================================================================
|
|
// Return the X visual associated with the specified context
|
|
//========================================================================
|
|
|
|
XVisualInfo* _glfwGetContextVisual(_GLFWwindow* window)
|
|
{
|
|
return window->GLX.visual;
|
|
}
|
|
|
|
|
|
//========================================================================
|
|
// Make the OpenGL context associated with the specified window current
|
|
//========================================================================
|
|
|
|
void _glfwPlatformMakeContextCurrent(_GLFWwindow* window)
|
|
{
|
|
if (window)
|
|
{
|
|
glXMakeCurrent(_glfwLibrary.X11.display,
|
|
window->X11.handle,
|
|
window->GLX.context);
|
|
}
|
|
else
|
|
glXMakeCurrent(_glfwLibrary.X11.display, None, NULL);
|
|
}
|
|
|
|
|
|
//========================================================================
|
|
// Swap OpenGL buffers
|
|
//========================================================================
|
|
|
|
void _glfwPlatformSwapBuffers(void)
|
|
{
|
|
glXSwapBuffers(_glfwLibrary.X11.display,
|
|
_glfwLibrary.currentWindow->X11.handle);
|
|
}
|
|
|
|
|
|
//========================================================================
|
|
// Set double buffering swap interval
|
|
//========================================================================
|
|
|
|
void _glfwPlatformSwapInterval(int interval)
|
|
{
|
|
_GLFWwindow* window = _glfwLibrary.currentWindow;
|
|
|
|
if (_glfwLibrary.GLX.EXT_swap_control)
|
|
{
|
|
_glfwLibrary.GLX.SwapIntervalEXT(_glfwLibrary.X11.display,
|
|
window->X11.handle,
|
|
interval);
|
|
}
|
|
else if (_glfwLibrary.GLX.MESA_swap_control)
|
|
_glfwLibrary.GLX.SwapIntervalMESA(interval);
|
|
else if (_glfwLibrary.GLX.SGI_swap_control)
|
|
{
|
|
if (interval > 0)
|
|
_glfwLibrary.GLX.SwapIntervalSGI(interval);
|
|
}
|
|
}
|
|
|
|
|
|
//========================================================================
|
|
// Check if an OpenGL extension is available at runtime
|
|
//========================================================================
|
|
|
|
int _glfwPlatformExtensionSupported(const char* extension)
|
|
{
|
|
const GLubyte* extensions;
|
|
|
|
// Get list of GLX extensions
|
|
extensions = (const GLubyte*) glXQueryExtensionsString(_glfwLibrary.X11.display,
|
|
_glfwLibrary.X11.screen);
|
|
if (extensions != NULL)
|
|
{
|
|
if (_glfwStringInExtensionString(extension, extensions))
|
|
return GL_TRUE;
|
|
}
|
|
|
|
return GL_FALSE;
|
|
}
|
|
|
|
|
|
//========================================================================
|
|
// Get the function pointer to an OpenGL function
|
|
//========================================================================
|
|
|
|
GLFWglproc _glfwPlatformGetProcAddress(const char* procname)
|
|
{
|
|
return _glfw_glXGetProcAddress((const GLubyte*) procname);
|
|
}
|
|
|
|
|
|
//========================================================================
|
|
// Copies the specified OpenGL state categories from src to dst
|
|
//========================================================================
|
|
|
|
void _glfwPlatformCopyContext(_GLFWwindow* src, _GLFWwindow* dst, unsigned long mask)
|
|
{
|
|
glXCopyContext(_glfwLibrary.X11.display,
|
|
src->GLX.context,
|
|
dst->GLX.context,
|
|
mask);
|
|
}
|
|
|