mirror of
https://github.com/glfw/glfw.git
synced 2025-10-03 13:20:58 +00:00
Merge 32d5883fc4 into 08b3af4387
This commit is contained in:
Hans W. Uhlig
commit
0793809bd5
@ -489,6 +489,18 @@ write_basic_package_version_file("${GLFW_BINARY_DIR}/src/glfw3ConfigVersion.cmak
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VERSION ${GLFW_VERSION_FULL}
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COMPATIBILITY SameMajorVersion)
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OPTION(GLFW_USE_GL3W "Use Internal OpenGL loader" ON)
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if(GLFW_USE_GL3W)
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FIND_PACKAGE(PythonInterp 2.6 REQUIRED)
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EXECUTE_PROCESS(COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/gl3w_gen.py
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WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
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INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR}/include)
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ADD_LIBRARY(gl3w ${CMAKE_CURRENT_BINARY_DIR}/src/gl3w.c)
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IF(UNIX)
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TARGET_LINK_LIBRARIES(gl3w dl)
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ENDIF()
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endif()
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if (GLFW_BUILD_DOCS)
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configure_file("${GLFW_SOURCE_DIR}/docs/Doxyfile.in"
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"${GLFW_BINARY_DIR}/docs/Doxyfile" @ONLY)
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284
gl3w_gen.py
Normal file
284
gl3w_gen.py
Normal file
@ -0,0 +1,284 @@
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#!/usr/bin/env python
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# This file is part of gl3w, hosted at https://github.com/skaslev/gl3w
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#
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# This is free and unencumbered software released into the public domain.
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#
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# Anyone is free to copy, modify, publish, use, compile, sell, or
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# distribute this software, either in source code form or as a compiled
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# binary, for any purpose, commercial or non-commercial, and by any
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# means.
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#
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# In jurisdictions that recognize copyright laws, the author or authors
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# of this software dedicate any and all copyright interest in the
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# software to the public domain. We make this dedication for the benefit
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# of the public at large and to the detriment of our heirs and
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# successors. We intend this dedication to be an overt act of
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# relinquishment in perpetuity of all present and future rights to this
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# software under copyright law.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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# OTHER DEALINGS IN THE SOFTWARE.
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# Allow Python 2.6+ to use the print() function
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from __future__ import print_function
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import re
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import os
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# Try to import Python 3 library urllib.request
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# and if it fails, fall back to Python 2 urllib2
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try:
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import urllib.request as urllib2
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except ImportError:
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import urllib2
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# UNLICENSE copyright header
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UNLICENSE = br'''/*
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This file was generated with gl3w_gen.py, part of gl3w
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(hosted at https://github.com/skaslev/gl3w)
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This is free and unencumbered software released into the public domain.
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Anyone is free to copy, modify, publish, use, compile, sell, or
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distribute this software, either in source code form or as a compiled
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binary, for any purpose, commercial or non-commercial, and by any
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means.
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In jurisdictions that recognize copyright laws, the author or authors
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of this software dedicate any and all copyright interest in the
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software to the public domain. We make this dedication for the benefit
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of the public at large and to the detriment of our heirs and
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successors. We intend this dedication to be an overt act of
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relinquishment in perpetuity of all present and future rights to this
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software under copyright law.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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*/
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'''
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# Create directories
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if not os.path.exists('include/GL'):
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os.makedirs('include/GL')
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if not os.path.exists('src'):
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os.makedirs('src')
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# Download glcorearb.h
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if not os.path.exists('include/GL/glcorearb.h'):
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print('-- Downloading glcorearb.h to include/GL...')
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web = urllib2.urlopen('https://www.opengl.org/registry/api/GL/glcorearb.h')
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with open('include/GL/glcorearb.h', 'wb') as f:
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f.writelines(web.readlines())
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else:
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print('-- Reusing glcorearb.h from include/GL...')
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# Parse function names from glcorearb.h
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print('-- Parsing glcorearb.h header...')
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procs = []
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p = re.compile(r'GLAPI.*APIENTRY\s+(\w+)')
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with open('include/GL/glcorearb.h', 'r') as f:
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for line in f:
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m = p.match(line)
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if m:
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procs.append(m.group(1))
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procs.sort()
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def proc_t(proc):
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return { 'p': proc,
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'p_s': 'gl3w' + proc[2:],
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'p_t': 'PFN' + proc.upper() + 'PROC' }
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# Generate gl3w.h
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print('-- Generating gl3w.h in include/GL...')
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with open('include/GL/gl3w.h', 'wb') as f:
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f.write(UNLICENSE)
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f.write(br'''#ifndef __gl3w_h_
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#define __gl3w_h_
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#include <GL/glcorearb.h>
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#ifndef __gl_h_
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#define __gl_h_
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef void (*GL3WglProc)(void);
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/* gl3w api */
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int gl3wInit(void);
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int gl3wIsSupported(int major, int minor);
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GL3WglProc gl3wGetProcAddress(const char *proc);
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/* OpenGL functions */
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''')
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for proc in procs:
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f.write('extern {0[p_t]: <52} {0[p_s]};\n'.format(proc_t(proc)).encode("utf-8"))
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f.write(b'\n')
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for proc in procs:
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f.write('#define {0[p]: <45} {0[p_s]}\n'.format(proc_t(proc)).encode("utf-8"))
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f.write(br'''
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#ifdef __cplusplus
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}
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#endif
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#endif
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''')
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# Generate gl3w.c
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print('-- Generating gl3w.c in src...')
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with open('src/gl3w.c', 'wb') as f:
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f.write(UNLICENSE)
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f.write(br'''#include <GL/gl3w.h>
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#ifdef _WIN32
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#define WIN32_LEAN_AND_MEAN 1
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#include <windows.h>
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static HMODULE libgl;
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static void open_libgl(void)
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{
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libgl = LoadLibraryA("opengl32.dll");
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}
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static void close_libgl(void)
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{
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FreeLibrary(libgl);
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}
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static GL3WglProc get_proc(const char *proc)
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{
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GL3WglProc res;
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res = (GL3WglProc) wglGetProcAddress(proc);
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if (!res)
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res = (GL3WglProc) GetProcAddress(libgl, proc);
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return res;
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}
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#elif defined(__APPLE__) || defined(__APPLE_CC__)
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#include <Carbon/Carbon.h>
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CFBundleRef bundle;
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CFURLRef bundleURL;
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static void open_libgl(void)
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{
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bundleURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault,
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CFSTR("/System/Library/Frameworks/OpenGL.framework"),
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kCFURLPOSIXPathStyle, true);
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bundle = CFBundleCreate(kCFAllocatorDefault, bundleURL);
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assert(bundle != NULL);
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}
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static void close_libgl(void)
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{
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CFRelease(bundle);
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CFRelease(bundleURL);
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}
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static GL3WglProc get_proc(const char *proc)
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{
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GL3WglProc res;
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CFStringRef procname = CFStringCreateWithCString(kCFAllocatorDefault, proc,
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kCFStringEncodingASCII);
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res = (GL3WglProc) CFBundleGetFunctionPointerForName(bundle, procname);
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CFRelease(procname);
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return res;
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}
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#else
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#include <dlfcn.h>
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#include <GL/glx.h>
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static void *libgl;
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static void open_libgl(void)
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{
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libgl = dlopen("libGL.so.1", RTLD_LAZY | RTLD_GLOBAL);
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}
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static void close_libgl(void)
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{
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dlclose(libgl);
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}
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static GL3WglProc get_proc(const char *proc)
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{
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GL3WglProc res;
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res = (GL3WglProc) glXGetProcAddress((const GLubyte *) proc);
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if (!res)
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res = (GL3WglProc) dlsym(libgl, proc);
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return res;
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}
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#endif
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static struct {
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int major, minor;
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} version;
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static int parse_version(void)
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{
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if (!glGetIntegerv)
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return -1;
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glGetIntegerv(GL_MAJOR_VERSION, &version.major);
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glGetIntegerv(GL_MINOR_VERSION, &version.minor);
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if (version.major < 3)
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return -1;
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return 0;
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}
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static void load_procs(void);
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int gl3wInit(void)
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{
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open_libgl();
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load_procs();
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close_libgl();
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return parse_version();
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}
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int gl3wIsSupported(int major, int minor)
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{
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if (major < 3)
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return 0;
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if (version.major == major)
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return version.minor >= minor;
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return version.major >= major;
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}
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GL3WglProc gl3wGetProcAddress(const char *proc)
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{
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return get_proc(proc);
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}
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''')
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for proc in procs:
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f.write('{0[p_t]: <52} {0[p_s]};\n'.format(proc_t(proc)).encode("utf-8"))
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f.write(br'''
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static void load_procs(void)
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{
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''')
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for proc in procs:
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f.write('\t{0[p_s]} = ({0[p_t]}) get_proc("{0[p]}");\n'.format(proc_t(proc)).encode("utf-8"))
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f.write(b'}\n')
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@ -127,7 +127,9 @@ extern "C" {
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#include <OpenGL/glu.h>
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#endif
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#else
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#if defined(GLFW_INCLUDE_GLCOREARB)
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#if defined(GLFW_INCLUDE_GL3W)
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#include <GL/gl3w.h>
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#elif defined(GLFW_INCLUDE_GLCOREARB)
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#include <GL/glcorearb.h>
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#elif defined(GLFW_INCLUDE_ES1)
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#include <GLES/gl.h>
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