mirror of
https://github.com/FEX-Emu/FEX.git
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73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
/*
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$info$
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tags: thunklibs|GL
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desc: Handles glXGetProcAddress
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$end_info$
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*/
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#define GL_GLEXT_PROTOTYPES 1
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#define GLX_GLXEXT_PROTOTYPES 1
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#include <GL/glx.h>
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#include <GL/glxext.h>
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#include <GL/gl.h>
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#include <GL/glext.h>
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#undef GL_ARB_viewport_array
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#include "glcorearb.h"
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#include <stdio.h>
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#include <cstdlib>
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#include <functional>
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#include <string_view>
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#include <unordered_map>
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#include "common/Guest.h"
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#include "thunks.inl"
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#include "function_packs.inl"
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#include "function_packs_public.inl"
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#include "symbol_list.inl"
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typedef void voidFunc();
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// Maps OpenGL API function names to the address of a guest function which is
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// linked to the corresponding host function pointer
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const std::unordered_map<std::string_view, uintptr_t /* guest function address */> HostPtrInvokers =
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std::invoke([]() {
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#define PAIR(name, unused) Ret[#name] = reinterpret_cast<uintptr_t>(GetCallerForHostFunction(name));
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std::unordered_map<std::string_view, uintptr_t> Ret;
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FOREACH_internal_SYMBOL(PAIR);
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return Ret;
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#undef PAIR
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});
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extern "C" {
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voidFunc *glXGetProcAddress(const GLubyte *procname) {
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auto Ret = fexfn_pack_glXGetProcAddress(procname);
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if (!Ret) {
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return nullptr;
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}
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auto TargetFuncIt = HostPtrInvokers.find(reinterpret_cast<const char*>(procname));
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if (TargetFuncIt == HostPtrInvokers.end()) {
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// Extension found in host but not in our interface definition => treat as fatal error
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fprintf(stderr, "glXGetProcAddress: not found %s\n", procname);
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__builtin_trap();
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}
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LinkAddressToFunction((uintptr_t)Ret, TargetFuncIt->second);
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return Ret;
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}
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voidFunc *glXGetProcAddressARB(const GLubyte *procname) {
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return glXGetProcAddress(procname);
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}
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}
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// libGL.so must pull in libX11.so as a dependency. Referencing some libX11
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// symbol here prevents the linker from optimizing away the unused dependency
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auto implicit_libx11_dependency = XSetErrorHandler;
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LOAD_LIB(libGL)
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