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558 lines
17 KiB
558 lines
17 KiB
//======================================================================== |
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// GLFW 3.1 GLX - 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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#include <assert.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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#ifndef GLXBadProfileARB |
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#define GLXBadProfileARB 13 |
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#endif |
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// Returns the specified attribute of the specified GLXFBConfig |
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// |
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static int getFBConfigAttrib(GLXFBConfig fbconfig, int attrib) |
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{ |
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int value; |
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glXGetFBConfigAttrib(_glfw.x11.display, fbconfig, attrib, &value); |
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return value; |
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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 GLboolean chooseFBConfig(const _GLFWfbconfig* desired, GLXFBConfig* result) |
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{ |
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GLXFBConfig* nativeConfigs; |
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_GLFWfbconfig* usableConfigs; |
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const _GLFWfbconfig* closest; |
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int i, nativeCount, usableCount; |
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const char* vendor; |
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GLboolean trustWindowBit = GL_TRUE; |
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vendor = glXGetClientString(_glfw.x11.display, GLX_VENDOR); |
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if (strcmp(vendor, "Chromium") == 0) |
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{ |
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// HACK: This is a (hopefully temporary) workaround for Chromium |
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// (VirtualBox GL) not setting the window bit on any GLXFBConfigs |
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trustWindowBit = GL_FALSE; |
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} |
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nativeConfigs = glXGetFBConfigs(_glfw.x11.display, _glfw.x11.screen, |
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&nativeCount); |
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if (!nativeCount) |
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{ |
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_glfwInputError(GLFW_API_UNAVAILABLE, "GLX: No GLXFBConfigs returned"); |
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return GL_FALSE; |
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} |
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usableConfigs = calloc(nativeCount, sizeof(_GLFWfbconfig)); |
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usableCount = 0; |
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for (i = 0; i < nativeCount; i++) |
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{ |
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const GLXFBConfig n = nativeConfigs[i]; |
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_GLFWfbconfig* u = usableConfigs + usableCount; |
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if (!getFBConfigAttrib(n, GLX_VISUAL_ID)) |
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{ |
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// Only consider GLXFBConfigs with associated visuals |
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continue; |
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} |
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if (!(getFBConfigAttrib(n, 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(n, 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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u->redBits = getFBConfigAttrib(n, GLX_RED_SIZE); |
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u->greenBits = getFBConfigAttrib(n, GLX_GREEN_SIZE); |
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u->blueBits = getFBConfigAttrib(n, GLX_BLUE_SIZE); |
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u->alphaBits = getFBConfigAttrib(n, GLX_ALPHA_SIZE); |
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u->depthBits = getFBConfigAttrib(n, GLX_DEPTH_SIZE); |
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u->stencilBits = getFBConfigAttrib(n, GLX_STENCIL_SIZE); |
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u->accumRedBits = getFBConfigAttrib(n, GLX_ACCUM_RED_SIZE); |
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u->accumGreenBits = getFBConfigAttrib(n, GLX_ACCUM_GREEN_SIZE); |
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u->accumBlueBits = getFBConfigAttrib(n, GLX_ACCUM_BLUE_SIZE); |
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u->accumAlphaBits = getFBConfigAttrib(n, GLX_ACCUM_ALPHA_SIZE); |
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u->auxBuffers = getFBConfigAttrib(n, GLX_AUX_BUFFERS); |
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if (getFBConfigAttrib(n, GLX_STEREO)) |
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u->stereo = GL_TRUE; |
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if (getFBConfigAttrib(n, GLX_DOUBLEBUFFER)) |
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u->doublebuffer = GL_TRUE; |
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if (_glfw.glx.ARB_multisample) |
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u->samples = getFBConfigAttrib(n, GLX_SAMPLES); |
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if (_glfw.glx.ARB_framebuffer_sRGB) |
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u->sRGB = getFBConfigAttrib(n, GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB); |
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u->glx = n; |
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usableCount++; |
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} |
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closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount); |
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if (closest) |
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*result = closest->glx; |
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XFree(nativeConfigs); |
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free(usableConfigs); |
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return closest ? GL_TRUE : GL_FALSE; |
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} |
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// Create the OpenGL context using legacy API |
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// |
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static GLXContext createLegacyContext(_GLFWwindow* window, |
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GLXFBConfig fbconfig, |
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GLXContext share) |
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{ |
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return glXCreateNewContext(_glfw.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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////////////////////////////////////////////////////////////////////////// |
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////// GLFW internal API ////// |
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////////////////////////////////////////////////////////////////////////// |
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// Initialize GLX |
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// |
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int _glfwInitContextAPI(void) |
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{ |
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if (!_glfwInitTLS()) |
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return GL_FALSE; |
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#ifdef _GLFW_DLOPEN_LIBGL |
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_glfw.glx.libGL = dlopen("libGL.so.1", RTLD_LAZY | RTLD_GLOBAL); |
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if (!_glfw.glx.libGL) |
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{ |
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_glfwInputError(GLFW_PLATFORM_ERROR, "GLX: Failed to find libGL"); |
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return GL_FALSE; |
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} |
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#endif |
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if (!glXQueryExtension(_glfw.x11.display, |
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&_glfw.glx.errorBase, |
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&_glfw.glx.eventBase)) |
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{ |
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_glfwInputError(GLFW_API_UNAVAILABLE, "GLX: GLX extension not found"); |
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return GL_FALSE; |
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} |
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if (!glXQueryVersion(_glfw.x11.display, |
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&_glfw.glx.versionMajor, |
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&_glfw.glx.versionMinor)) |
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{ |
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_glfwInputError(GLFW_API_UNAVAILABLE, |
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"GLX: Failed to query GLX version"); |
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return GL_FALSE; |
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} |
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if (_glfw.glx.versionMajor == 1 && _glfw.glx.versionMinor < 3) |
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{ |
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_glfwInputError(GLFW_API_UNAVAILABLE, |
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"GLX: GLX version 1.3 is required"); |
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return GL_FALSE; |
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} |
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if (_glfwPlatformExtensionSupported("GLX_EXT_swap_control")) |
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{ |
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_glfw.glx.SwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC) |
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_glfwPlatformGetProcAddress("glXSwapIntervalEXT"); |
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if (_glfw.glx.SwapIntervalEXT) |
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_glfw.glx.EXT_swap_control = GL_TRUE; |
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} |
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if (_glfwPlatformExtensionSupported("GLX_SGI_swap_control")) |
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{ |
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_glfw.glx.SwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC) |
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_glfwPlatformGetProcAddress("glXSwapIntervalSGI"); |
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if (_glfw.glx.SwapIntervalSGI) |
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_glfw.glx.SGI_swap_control = GL_TRUE; |
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} |
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if (_glfwPlatformExtensionSupported("GLX_MESA_swap_control")) |
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{ |
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_glfw.glx.SwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC) |
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_glfwPlatformGetProcAddress("glXSwapIntervalMESA"); |
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if (_glfw.glx.SwapIntervalMESA) |
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_glfw.glx.MESA_swap_control = GL_TRUE; |
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} |
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if (_glfwPlatformExtensionSupported("GLX_ARB_multisample")) |
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_glfw.glx.ARB_multisample = GL_TRUE; |
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if (_glfwPlatformExtensionSupported("GLX_ARB_framebuffer_sRGB")) |
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_glfw.glx.ARB_framebuffer_sRGB = GL_TRUE; |
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if (_glfwPlatformExtensionSupported("GLX_ARB_create_context")) |
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{ |
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_glfw.glx.CreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC) |
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_glfwPlatformGetProcAddress("glXCreateContextAttribsARB"); |
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if (_glfw.glx.CreateContextAttribsARB) |
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_glfw.glx.ARB_create_context = GL_TRUE; |
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} |
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if (_glfwPlatformExtensionSupported("GLX_ARB_create_context_robustness")) |
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_glfw.glx.ARB_create_context_robustness = GL_TRUE; |
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if (_glfwPlatformExtensionSupported("GLX_ARB_create_context_profile")) |
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_glfw.glx.ARB_create_context_profile = GL_TRUE; |
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if (_glfwPlatformExtensionSupported("GLX_EXT_create_context_es2_profile")) |
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_glfw.glx.EXT_create_context_es2_profile = GL_TRUE; |
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if (_glfwPlatformExtensionSupported("GLX_ARB_context_flush_control")) |
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_glfw.glx.ARB_context_flush_control = GL_TRUE; |
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return GL_TRUE; |
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} |
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// Terminate GLX |
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// |
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void _glfwTerminateContextAPI(void) |
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{ |
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// Unload libGL.so if necessary |
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#ifdef _GLFW_DLOPEN_LIBGL |
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if (_glfw.glx.libGL != NULL) |
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{ |
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dlclose(_glfw.glx.libGL); |
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_glfw.glx.libGL = NULL; |
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} |
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#endif |
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_glfwTerminateTLS(); |
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} |
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#define setGLXattrib(attribName, attribValue) \ |
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{ \ |
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attribs[index++] = attribName; \ |
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attribs[index++] = attribValue; \ |
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assert((size_t) index < sizeof(attribs) / sizeof(attribs[0])); \ |
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} |
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// Create the OpenGL or OpenGL ES context |
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// |
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int _glfwCreateContext(_GLFWwindow* window, |
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const _GLFWctxconfig* ctxconfig, |
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const _GLFWfbconfig* fbconfig) |
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{ |
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int attribs[40]; |
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GLXFBConfig native; |
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GLXContext share = NULL; |
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if (ctxconfig->share) |
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share = ctxconfig->share->glx.context; |
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if (!chooseFBConfig(fbconfig, &native)) |
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{ |
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_glfwInputError(GLFW_PLATFORM_ERROR, |
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"GLX: Failed to find a suitable GLXFBConfig"); |
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return GL_FALSE; |
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} |
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// Retrieve the corresponding visual |
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window->glx.visual = glXGetVisualFromFBConfig(_glfw.x11.display, native); |
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if (!window->glx.visual) |
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{ |
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_glfwInputError(GLFW_PLATFORM_ERROR, |
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"GLX: Failed to retrieve visual for GLXFBConfig"); |
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return GL_FALSE; |
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} |
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if (ctxconfig->api == GLFW_OPENGL_ES_API) |
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{ |
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if (!_glfw.glx.ARB_create_context || |
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!_glfw.glx.ARB_create_context_profile || |
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!_glfw.glx.EXT_create_context_es2_profile) |
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{ |
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_glfwInputError(GLFW_API_UNAVAILABLE, |
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"GLX: OpenGL ES 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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} |
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if (ctxconfig->forward) |
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{ |
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if (!_glfw.glx.ARB_create_context) |
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{ |
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_glfwInputError(GLFW_VERSION_UNAVAILABLE, |
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"GLX: Forward compatibility 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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} |
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if (ctxconfig->profile) |
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{ |
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if (!_glfw.glx.ARB_create_context || |
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!_glfw.glx.ARB_create_context_profile) |
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{ |
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_glfwInputError(GLFW_VERSION_UNAVAILABLE, |
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"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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} |
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_glfwGrabXErrorHandler(); |
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if (_glfw.glx.ARB_create_context) |
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{ |
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int index = 0, mask = 0, flags = 0, strategy = 0; |
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if (ctxconfig->api == GLFW_OPENGL_API) |
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{ |
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if (ctxconfig->forward) |
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flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB; |
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if (ctxconfig->profile) |
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{ |
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if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE) |
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mask |= GLX_CONTEXT_CORE_PROFILE_BIT_ARB; |
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else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE) |
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mask |= GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; |
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} |
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} |
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else |
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mask |= GLX_CONTEXT_ES2_PROFILE_BIT_EXT; |
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if (ctxconfig->debug) |
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flags |= GLX_CONTEXT_DEBUG_BIT_ARB; |
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if (ctxconfig->robustness) |
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{ |
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if (_glfw.glx.ARB_create_context_robustness) |
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{ |
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if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION) |
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strategy = GLX_NO_RESET_NOTIFICATION_ARB; |
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else if (ctxconfig->robustness == GLFW_LOSE_CONTEXT_ON_RESET) |
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strategy = GLX_LOSE_CONTEXT_ON_RESET_ARB; |
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flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB; |
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} |
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} |
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if (ctxconfig->release) |
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{ |
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if (_glfw.glx.ARB_context_flush_control) |
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{ |
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if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_NONE) |
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{ |
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setGLXattrib(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB, |
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GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB); |
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} |
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else if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_FLUSH) |
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{ |
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setGLXattrib(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB, |
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GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB); |
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} |
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} |
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} |
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if (ctxconfig->major != 1 || ctxconfig->minor != 0) |
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{ |
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// NOTE: Only request an explicitly versioned context when |
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// necessary, as explicitly requesting version 1.0 does not |
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// always return the highest available version |
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setGLXattrib(GLX_CONTEXT_MAJOR_VERSION_ARB, ctxconfig->major); |
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setGLXattrib(GLX_CONTEXT_MINOR_VERSION_ARB, ctxconfig->minor); |
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} |
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if (mask) |
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setGLXattrib(GLX_CONTEXT_PROFILE_MASK_ARB, mask); |
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if (flags) |
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setGLXattrib(GLX_CONTEXT_FLAGS_ARB, flags); |
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if (strategy) |
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setGLXattrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB, strategy); |
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setGLXattrib(None, None); |
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window->glx.context = |
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_glfw.glx.CreateContextAttribsARB(_glfw.x11.display, |
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native, |
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share, |
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True, |
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attribs); |
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if (!window->glx.context) |
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{ |
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// HACK: This is a fallback for the broken Mesa implementation of |
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// GLX_ARB_create_context_profile, which fails default 1.0 |
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// context creation with a GLXBadProfileARB error in violation |
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// of the extension spec |
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if (_glfw.x11.errorCode == _glfw.glx.errorBase + GLXBadProfileARB && |
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ctxconfig->api == GLFW_OPENGL_API && |
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ctxconfig->profile == GLFW_OPENGL_ANY_PROFILE && |
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ctxconfig->forward == GL_FALSE) |
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{ |
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window->glx.context = createLegacyContext(window, native, share); |
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} |
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} |
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} |
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else |
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window->glx.context = createLegacyContext(window, native, share); |
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_glfwReleaseXErrorHandler(); |
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if (!window->glx.context) |
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{ |
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_glfwInputXError(GLFW_PLATFORM_ERROR, "GLX: Failed to create 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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#undef setGLXattrib |
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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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if (window->glx.visual) |
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{ |
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XFree(window->glx.visual); |
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window->glx.visual = NULL; |
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} |
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if (window->glx.context) |
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{ |
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glXDestroyContext(_glfw.x11.display, window->glx.context); |
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window->glx.context = NULL; |
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} |
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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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{ |
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glXMakeCurrent(_glfw.x11.display, |
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window->x11.handle, |
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window->glx.context); |
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} |
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else |
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glXMakeCurrent(_glfw.x11.display, None, NULL); |
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_glfwSetCurrentContext(window); |
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} |
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void _glfwPlatformSwapBuffers(_GLFWwindow* window) |
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{ |
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glXSwapBuffers(_glfw.x11.display, window->x11.handle); |
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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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if (_glfw.glx.EXT_swap_control) |
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{ |
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_glfw.glx.SwapIntervalEXT(_glfw.x11.display, |
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window->x11.handle, |
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interval); |
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} |
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else if (_glfw.glx.MESA_swap_control) |
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_glfw.glx.SwapIntervalMESA(interval); |
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else if (_glfw.glx.SGI_swap_control) |
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{ |
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if (interval > 0) |
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_glfw.glx.SwapIntervalSGI(interval); |
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} |
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} |
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int _glfwPlatformExtensionSupported(const char* extension) |
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{ |
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const GLubyte* extensions; |
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// Get list of GLX extensions |
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extensions = (const GLubyte*) glXQueryExtensionsString(_glfw.x11.display, |
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_glfw.x11.screen); |
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if (extensions != NULL) |
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{ |
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if (_glfwStringInExtensionString(extension, extensions)) |
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return GL_TRUE; |
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} |
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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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return _glfw_glXGetProcAddress((const GLubyte*) procname); |
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} |
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////////////////////////////////////////////////////////////////////////// |
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////// GLFW native API ////// |
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////////////////////////////////////////////////////////////////////////// |
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GLFWAPI GLXContext glfwGetGLXContext(GLFWwindow* handle) |
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{ |
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_GLFWwindow* window = (_GLFWwindow*) handle; |
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_GLFW_REQUIRE_INIT_OR_RETURN(NULL); |
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return window->glx.context; |
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} |
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