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Library Forwarding: Support GL forwarding with guest-libX11
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Tony Wasserka committed
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a114850c2a
5 files changed
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-28
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@@ -6,7 +6,8 @@ $end_info$
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*/
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#include <cstdio>
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#include <dlfcn.h>
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#include <cstdlib>
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#include <string_view>
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#define GL_GLEXT_PROTOTYPES 1
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#define GLX_GLXEXT_PROTOTYPES 1
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@@ -17,15 +18,195 @@ $end_info$
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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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#include <cstdlib>
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#include <xcb/xcb.h>
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#include "common/Host.h"
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#include "common/X11Manager.h"
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template<>
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struct host_layout<_XDisplay*> {
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_XDisplay* data;
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_XDisplay* guest_display;
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host_layout(guest_layout<_XDisplay*>&);
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~host_layout();
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};
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static X11Manager x11_manager;
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static void* (*GuestMalloc)(size_t) = nullptr;
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host_layout<_XDisplay*>::host_layout(guest_layout<_XDisplay*>& guest)
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: guest_display(guest.force_get_host_pointer()) {
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data = x11_manager.GuestToHostDisplay(guest_display);
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}
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host_layout<_XDisplay*>::~host_layout() {
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// Flush host-side event queue to make effects of the guest-side connection visible
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x11_manager.HostXFlush(data);
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}
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static void fexfn_impl_libGL_SetGuestMalloc(uintptr_t GuestTarget, uintptr_t GuestUnpacker) {
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MakeHostTrampolineForGuestFunctionAt(GuestTarget, GuestUnpacker, &GuestMalloc);
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}
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static void fexfn_impl_libGL_SetGuestXGetVisualInfo(uintptr_t GuestTarget, uintptr_t GuestUnpacker) {
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MakeHostTrampolineForGuestFunctionAt(GuestTarget, GuestUnpacker, &x11_manager.GuestXGetVisualInfo);
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}
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static void fexfn_impl_libGL_SetGuestXSync(uintptr_t GuestTarget, uintptr_t GuestUnpacker) {
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MakeHostTrampolineForGuestFunctionAt(GuestTarget, GuestUnpacker, &x11_manager.GuestXSync);
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}
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static void fexfn_impl_libGL_SetGuestXDisplayString(uintptr_t GuestTarget, uintptr_t GuestUnpacker) {
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MakeHostTrampolineForGuestFunctionAt(GuestTarget, GuestUnpacker, &x11_manager.GuestXDisplayString);
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}
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#include "thunkgen_host_libGL.inl"
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void* symbolFromGlXGetProcAddr(void*, const char* name) {
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return (void*)glXGetProcAddress((const GLubyte*)name);
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auto fexfn_impl_libGL_glXGetProcAddress(const GLubyte* name) -> void (*)() {
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using VoidFn = void (*)();
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std::string_view name_sv {reinterpret_cast<const char*>(name)};
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if (name_sv == "glXChooseFBConfig") {
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return (VoidFn)fexfn_impl_libGL_glXChooseFBConfig;
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} else if (name_sv == "glXChooseFBConfigSGIX") {
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return (VoidFn)fexfn_impl_libGL_glXChooseFBConfigSGIX;
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} else if (name_sv == "glXGetFBConfigs") {
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return (VoidFn)fexfn_impl_libGL_glXGetFBConfigs;
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} else if (name_sv == "glXGetFBConfigFromVisualSGIX") {
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return (VoidFn)fexfn_impl_libGL_glXGetFBConfigFromVisualSGIX;
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} else if (name_sv == "glXGetVisualFromFBConfigSGIX") {
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return (VoidFn)fexfn_impl_libGL_glXGetVisualFromFBConfigSGIX;
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} else if (name_sv == "glXChooseVisual") {
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return (VoidFn)fexfn_impl_libGL_glXChooseVisual;
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} else if (name_sv == "glXCreateContext") {
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return (VoidFn)fexfn_impl_libGL_glXCreateContext;
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} else if (name_sv == "glXCreateGLXPixmap") {
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return (VoidFn)fexfn_impl_libGL_glXCreateGLXPixmap;
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} else if (name_sv == "glXCreateGLXPixmapMESA") {
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return (VoidFn)fexfn_impl_libGL_glXCreateGLXPixmapMESA;
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} else if (name_sv == "glXGetConfig") {
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return (VoidFn)fexfn_impl_libGL_glXGetConfig;
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} else if (name_sv == "glXGetVisualFromFBConfig") {
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return (VoidFn)fexfn_impl_libGL_glXGetVisualFromFBConfig;
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}
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return (VoidFn)glXGetProcAddress((const GLubyte*)name);
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}
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// Relocate data to guest heap so it can be called with XFree.
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// The memory at the given host location will be de-allocated.
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template<typename T>
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T* RelocateArrayToGuestHeap(T* Data, int NumItems) {
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if (!Data) {
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return nullptr;
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}
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guest_layout<T*> GuestData;
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GuestData.data = reinterpret_cast<uintptr_t>(GuestMalloc(sizeof(guest_layout<T>) * NumItems));
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for (int Index = 0; Index < NumItems; ++Index) {
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GuestData.get_pointer()[Index] = to_guest(to_host_layout(Data[Index]));
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}
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x11_manager.HostXFree(Data);
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return GuestData.force_get_host_pointer();
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}
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// Maps to a host-side XVisualInfo, which must be XFree'ed by the caller.
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static XVisualInfo* LookupHostVisualInfo(Display* HostDisplay, guest_layout<XVisualInfo*> GuestInfo) {
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if (!GuestInfo.data) {
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return nullptr;
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}
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int num_matches;
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auto ret = x11_manager.HostXGetVisualInfo(HostDisplay, VisualScreenMask | VisualIDMask, GuestInfo.force_get_host_pointer(), &num_matches);
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if (num_matches != 1) {
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fprintf(stderr, "ERROR: Did not find unique host XVisualInfo\n");
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std::abort();
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}
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return ret;
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}
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// Maps to a guest-side XVisualInfo and destroys the host argument.
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static guest_layout<XVisualInfo*> MapToGuestVisualInfo(Display* HostDisplay, XVisualInfo* HostInfo) {
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if (!HostInfo) {
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return guest_layout<XVisualInfo*> {.data = 0};
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}
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int num_matches;
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auto guest_display = x11_manager.HostToGuestDisplay(HostDisplay);
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auto ret = x11_manager.GuestXGetVisualInfo(guest_display.get_pointer(), VisualScreenMask | VisualIDMask, HostInfo, &num_matches);
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if (num_matches != 1) {
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fprintf(stderr, "ERROR: Did not find unique guest XVisualInfo\n");
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std::abort();
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}
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// We effectively relocated the VisualInfo, so free the original one now
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x11_manager.HostXFree(HostInfo);
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guest_layout<XVisualInfo*> GuestRet;
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GuestRet.data = reinterpret_cast<uintptr_t>(ret);
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return GuestRet;
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}
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GLXFBConfig* fexfn_impl_libGL_glXChooseFBConfig(Display* Display, int Screen, const int* Attributes, int* NumItems) {
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auto ret = fexldr_ptr_libGL_glXChooseFBConfig(Display, Screen, Attributes, NumItems);
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return RelocateArrayToGuestHeap(ret, *NumItems);
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}
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GLXFBConfigSGIX* fexfn_impl_libGL_glXChooseFBConfigSGIX(Display* Display, int Screen, int* Attributes, int* NumItems) {
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auto ret = fexldr_ptr_libGL_glXChooseFBConfigSGIX(Display, Screen, Attributes, NumItems);
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return RelocateArrayToGuestHeap(ret, *NumItems);
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}
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GLXFBConfig* fexfn_impl_libGL_glXGetFBConfigs(Display* Display, int Screen, int* NumItems) {
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auto ret = fexldr_ptr_libGL_glXGetFBConfigs(Display, Screen, NumItems);
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return RelocateArrayToGuestHeap(ret, *NumItems);
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}
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GLXFBConfigSGIX fexfn_impl_libGL_glXGetFBConfigFromVisualSGIX(Display* Display, guest_layout<XVisualInfo*> Info) {
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auto HostInfo = LookupHostVisualInfo(Display, Info);
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auto ret = fexldr_ptr_libGL_glXGetFBConfigFromVisualSGIX(Display, HostInfo);
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x11_manager.HostXFree(HostInfo);
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return ret;
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}
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guest_layout<XVisualInfo*> fexfn_impl_libGL_glXGetVisualFromFBConfigSGIX(Display* Display, GLXFBConfigSGIX Config) {
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return MapToGuestVisualInfo(Display, fexldr_ptr_libGL_glXGetVisualFromFBConfigSGIX(Display, Config));
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}
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guest_layout<XVisualInfo*> fexfn_impl_libGL_glXChooseVisual(Display* Display, int Screen, int* Attributes) {
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return MapToGuestVisualInfo(Display, fexldr_ptr_libGL_glXChooseVisual(Display, Screen, Attributes));
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}
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GLXContext fexfn_impl_libGL_glXCreateContext(Display* Display, guest_layout<XVisualInfo*> Info, GLXContext ShareList, Bool Direct) {
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auto HostInfo = LookupHostVisualInfo(Display, Info);
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auto ret = fexldr_ptr_libGL_glXCreateContext(Display, HostInfo, ShareList, Direct);
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x11_manager.HostXFree(HostInfo);
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return ret;
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}
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GLXPixmap fexfn_impl_libGL_glXCreateGLXPixmap(Display* Display, guest_layout<XVisualInfo*> Info, Pixmap Pixmap) {
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auto HostInfo = LookupHostVisualInfo(Display, Info);
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auto ret = fexldr_ptr_libGL_glXCreateGLXPixmap(Display, HostInfo, Pixmap);
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x11_manager.HostXFree(HostInfo);
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return ret;
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}
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GLXPixmap fexfn_impl_libGL_glXCreateGLXPixmapMESA(Display* Display, guest_layout<XVisualInfo*> Info, Pixmap Pixmap, Colormap Colormap) {
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auto HostInfo = LookupHostVisualInfo(Display, Info);
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auto ret = fexldr_ptr_libGL_glXCreateGLXPixmapMESA(Display, HostInfo, Pixmap, Colormap);
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x11_manager.HostXFree(HostInfo);
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return ret;
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}
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int fexfn_impl_libGL_glXGetConfig(Display* Display, guest_layout<XVisualInfo*> Info, int Attribute, int* Value) {
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auto HostInfo = LookupHostVisualInfo(Display, Info);
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auto ret = fexldr_ptr_libGL_glXGetConfig(Display, HostInfo, Attribute, Value);
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x11_manager.HostXFree(HostInfo);
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return ret;
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}
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guest_layout<XVisualInfo*> fexfn_impl_libGL_glXGetVisualFromFBConfig(Display* Display, GLXFBConfig Config) {
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return MapToGuestVisualInfo(Display, fexldr_ptr_libGL_glXGetVisualFromFBConfig(Display, Config));
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}
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EXPORTS(libGL)
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