mirror of
https://github.com/TorqueGameEngines/Torque3D.git
synced 2026-05-31 18:16:37 +00:00
176 lines
5.9 KiB
C++
176 lines
5.9 KiB
C++
//-----------------------------------------------------------------------------
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// Copyright (c) 2012 GarageGames, LLC
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//-----------------------------------------------------------------------------
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#include "glx.h"
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#include "util/utilAssert.h"
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#include "util/utilStr.h"
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#include "util/utilString.h"
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#include "util/utilMemory.h"
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#include "os/osLog.h"
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#include "os/osDlibrary.h"
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//-----------------------------------------------------------------------------
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// Instantiation of GL function pointers in global namespace.
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#define GL_GROUP_BEGIN(name)
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#define GL_FUNCTION(name, type, args) type (XGL_DLL *name) args;
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#define GL_GROUP_END()
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#include "../generated/glcfn.h"
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#undef GL_GROUP_BEGIN
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#undef GL_FUNCTION
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#undef GL_GROUP_END
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namespace GL
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{
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using namespace Torque;
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bool bindFunction(DLibrary* dll,void *&fnAddress, const char *name);
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bool hasExtension(const char *name,const char* extensions);
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bool hasVersion(const char *name,const char* prefix,int major,int minor);
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//-----------------------------------------------------------------------------
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// Instantiation of GLX function pointers.
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#define GL_GROUP_BEGIN(name)
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#define GL_FUNCTION(name, type, args) type (XGL_DLL *name) args;
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#define GL_GROUP_END()
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#include "../generated/glxfn.h"
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#undef GL_GROUP_BEGIN
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#undef GL_FUNCTION
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#undef GL_GROUP_END
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//-----------------------------------------------------------------------------
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bool bindFunction(DLibrary* dll,GLFunction (*gproc)(const GLubyte*),
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void *&fnAddress, const char *name)
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{
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// Use the getProcAddress if we have it.
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fnAddress = gproc? (void*)(*gproc)((const GLubyte*)name): dll->bind(name);
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return fnAddress != 0;
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}
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//-----------------------------------------------------------------------------
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bool gglBindCoreFunctions(DLibrary* dll,GLXExtensionPtrs* glp)
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{
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bool bound = true;
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// Bind static functions which are quarenteed to be part of the
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// OpenGL library. In this case, OpenGL 1.0 and GLX 1.0 functions
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#define GL_GROUP_BEGIN(name)
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#define GL_GROUP_END()
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#define GL_FUNCTION(fn_name, fn_return, fn_args) \
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bound &= bindFunction(dll,*(void**)&fn_name, #fn_name);
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#include "../generated/glcfn.h"
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#include "../generated/glxfn.h"
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#undef GL_FUNCTION
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#undef GL_GROUP_BEGIN
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#undef GL_GROUP_END
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// Check for the getProcAddress first, otherwise we'll expect everything
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// to be in the DLL.
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memset(glp,0,sizeof(GLXExtensionPtrs));
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glp->_glXGetProcAddressARB = (GLFunction (*)(const GLubyte*))dll->bind("glXGetProcAddressARB");
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// Try and bind all known extension functions. We'll check later to
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// see which ones are actually valid for a context.
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#define GL_GROUP_BEGIN(name)
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#define GL_FUNCTION(fn_name, fn_return, fn_args) \
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bindFunction(dll,glp->_glXGetProcAddressARB,*(void**)&glp->_##fn_name, #fn_name);
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#define GL_GROUP_END()
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#include "../generated/glefn.h"
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#include "../generated/glxefn.h"
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#undef GL_FUNCTION
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#undef GL_GROUP_BEGIN
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#undef GL_GROUP_END
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return bound;
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}
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//-----------------------------------------------------------------------------
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void gglBindGLX(::Display* display,int screen,GLXExtensionFlags* glx)
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{
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// Check GLX version and glx extensions
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int glxMajor,glxMinor;
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glXQueryVersion(display,&glxMajor,&glxMinor);
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const char* glxExtensions = glXQueryExtensionsString(display,screen);
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static LogCategory log("/Gfx/Device/GL");
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log.print(format("GLX Version: %d.%d",glxMajor,glxMinor));
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Assert(glxMajor == 1 && glxMinor >= 1,"GLXBind: Need GLX version 1.1 or greater");
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#define GL_GROUP_BEGIN(name) \
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glx->has_##name = hasVersion(#name,"GLX_VERSION",glxMajor,glxMinor) || \
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hasExtension(#name,glxExtensions);
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#define GL_FUNCTION(fn_name, fn_return, fn_args)
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#define GL_GROUP_END()
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#include "../generated/glxefn.h"
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#undef GL_FUNCTION
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#undef GL_GROUP_BEGIN
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#undef GL_GROUP_END
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}
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//-----------------------------------------------------------------------------
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bool gglBindExtensions(GLExtensionFlags* gl)
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{
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memset(gl,0,sizeof(GLExtensionFlags));
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// Get GL version and extensions
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const char* glExtensions = (const char*)glGetString(GL_EXTENSIONS);
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const char* glVersion = (const char*) glGetString(GL_VERSION);
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if (!glExtensions || !glVersion)
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return false;
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// Parse the GL version string "major.minor"
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const char *itr = glVersion;
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int glMajor = atoi(itr);
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while (isDigit(*itr))
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*itr++;
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int glMinor = atoi(++itr);
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// Check which extensions are available on the active context.
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// GL and GLX versions ubove 1.0 are also tested here.
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#define GL_GROUP_BEGIN(name) \
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gl->has_##name = hasVersion(#name,"GL_VERSION",glMajor,glMinor) || \
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hasExtension(#name,glExtensions);
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#define GL_FUNCTION(fn_name, fn_return, fn_args)
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#define GL_GROUP_END()
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#include "../generated/glefn.h"
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#undef GL_FUNCTION
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#undef GL_GROUP_BEGIN
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#undef GL_GROUP_END
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gl->bound = true;
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return true;
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}
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} // Namespace
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