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395 lines (306 loc) · 13.8 KB
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/******************************************************************************
* The MIT License (MIT)
*
* Copyright (c) 2014 Crytek
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
******************************************************************************/
#include <dlfcn.h>
#include <stdio.h>
#include "hooks/hooks.h"
#include "driver/gl/gl_common.h"
#include "driver/gl/gl_hookset.h"
#include "driver/gl/gl_driver.h"
#include "common/string_utils.h"
// bit of a hack
namespace Keyboard { extern Display *CurrentXDisplay; }
typedef GLXContext (*PFNGLXCREATECONTEXTPROC)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
typedef const char *(*PFNGLXQUERYEXTENSIONSSTRING)(Display *dpy, int screen);
typedef Bool (*PFNGLXMAKECURRENTPROC)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
typedef void (*PFNGLXSWAPBUFFERSPROC)(Display *dpy, GLXDrawable drawable);
#define HookInit(function) \
GL.function = (CONCAT(function, _hooktype))dlsym(RTLD_NEXT, STRINGIZE(function));
#define HookExtension(funcPtrType, function) \
if(!strcmp(func, STRINGIZE(function))) \
{ \
OpenGLHook::glhooks.GL.function = (funcPtrType)realFunc; \
return (__GLXextFuncPtr)&function; \
}
#define HookExtensionAlias(funcPtrType, function, alias) \
if(!strcmp(func, STRINGIZE(alias))) \
{ \
OpenGLHook::glhooks.GL.function = (funcPtrType)realFunc; \
return (__GLXextFuncPtr)&function; \
}
/*
in bash:
function HookWrapper()
{
N=$1;
echo -n "#define HookWrapper$N(ret, function";
for I in `seq 1 $N`; do echo -n ", t$I, p$I"; done;
echo ") \\";
echo -en "\ttypedef ret (*CONCAT(function, _hooktype)) (";
for I in `seq 1 $N`; do echo -n "t$I"; if [ $I -ne $N ]; then echo -n ", "; fi; done;
echo "); \\";
echo -e "\textern \"C\" __attribute__ ((visibility (\"default\"))) \\";
echo -en "\tret function(";
for I in `seq 1 $N`; do echo -n "t$I p$I"; if [ $I -ne $N ]; then echo -n ", "; fi; done;
echo ") \\";
echo -en "\t{ return OpenGLHook::glhooks.GetDriver()->function(";
for I in `seq 1 $N`; do echo -n "p$I"; if [ $I -ne $N ]; then echo -n ", "; fi; done;
echo -n "); }";
}
for I in `seq 0 ...`; do HookWrapper $I; echo; done
*/
#define HookWrapper0(ret, function) \
typedef ret (*CONCAT(function, _hooktype)) (); \
extern "C" __attribute__ ((visibility ("default"))) \
ret function() \
{ return OpenGLHook::glhooks.GetDriver()->function(); }
#define HookWrapper1(ret, function, t1, p1) \
typedef ret (*CONCAT(function, _hooktype)) (t1); \
extern "C" __attribute__ ((visibility ("default"))) \
ret function(t1 p1) \
{ return OpenGLHook::glhooks.GetDriver()->function(p1); }
#define HookWrapper2(ret, function, t1, p1, t2, p2) \
typedef ret (*CONCAT(function, _hooktype)) (t1, t2); \
extern "C" __attribute__ ((visibility ("default"))) \
ret function(t1 p1, t2 p2) \
{ return OpenGLHook::glhooks.GetDriver()->function(p1, p2); }
#define HookWrapper3(ret, function, t1, p1, t2, p2, t3, p3) \
typedef ret (*CONCAT(function, _hooktype)) (t1, t2, t3); \
extern "C" __attribute__ ((visibility ("default"))) \
ret function(t1 p1, t2 p2, t3 p3) \
{ return OpenGLHook::glhooks.GetDriver()->function(p1, p2, p3); }
#define HookWrapper4(ret, function, t1, p1, t2, p2, t3, p3, t4, p4) \
typedef ret (*CONCAT(function, _hooktype)) (t1, t2, t3, t4); \
extern "C" __attribute__ ((visibility ("default"))) \
ret function(t1 p1, t2 p2, t3 p3, t4 p4) \
{ return OpenGLHook::glhooks.GetDriver()->function(p1, p2, p3, p4); }
#define HookWrapper5(ret, function, t1, p1, t2, p2, t3, p3, t4, p4, t5, p5) \
typedef ret (*CONCAT(function, _hooktype)) (t1, t2, t3, t4, t5); \
extern "C" __attribute__ ((visibility ("default"))) \
ret function(t1 p1, t2 p2, t3 p3, t4 p4, t5 p5) \
{ return OpenGLHook::glhooks.GetDriver()->function(p1, p2, p3, p4, p5); }
#define HookWrapper6(ret, function, t1, p1, t2, p2, t3, p3, t4, p4, t5, p5, t6, p6) \
typedef ret (*CONCAT(function, _hooktype)) (t1, t2, t3, t4, t5, t6); \
extern "C" __attribute__ ((visibility ("default"))) \
ret function(t1 p1, t2 p2, t3 p3, t4 p4, t5 p5, t6 p6) \
{ return OpenGLHook::glhooks.GetDriver()->function(p1, p2, p3, p4, p5, p6); }
#define HookWrapper7(ret, function, t1, p1, t2, p2, t3, p3, t4, p4, t5, p5, t6, p6, t7, p7) \
typedef ret (*CONCAT(function, _hooktype)) (t1, t2, t3, t4, t5, t6, t7); \
extern "C" __attribute__ ((visibility ("default"))) \
ret function(t1 p1, t2 p2, t3 p3, t4 p4, t5 p5, t6 p6, t7 p7) \
{ return OpenGLHook::glhooks.GetDriver()->function(p1, p2, p3, p4, p5, p6, p7); }
#define HookWrapper8(ret, function, t1, p1, t2, p2, t3, p3, t4, p4, t5, p5, t6, p6, t7, p7, t8, p8) \
typedef ret (*CONCAT(function, _hooktype)) (t1, t2, t3, t4, t5, t6, t7, t8); \
extern "C" __attribute__ ((visibility ("default"))) \
ret function(t1 p1, t2 p2, t3 p3, t4 p4, t5 p5, t6 p6, t7 p7, t8 p8) \
{ return OpenGLHook::glhooks.GetDriver()->function(p1, p2, p3, p4, p5, p6, p7, p8); }
#define HookWrapper9(ret, function, t1, p1, t2, p2, t3, p3, t4, p4, t5, p5, t6, p6, t7, p7, t8, p8, t9, p9) \
typedef ret (*CONCAT(function, _hooktype)) (t1, t2, t3, t4, t5, t6, t7, t8, t9); \
extern "C" __attribute__ ((visibility ("default"))) \
ret function(t1 p1, t2 p2, t3 p3, t4 p4, t5 p5, t6 p6, t7 p7, t8 p8, t9 p9) \
{ return OpenGLHook::glhooks.GetDriver()->function(p1, p2, p3, p4, p5, p6, p7, p8, p9); }
#define HookWrapper10(ret, function, t1, p1, t2, p2, t3, p3, t4, p4, t5, p5, t6, p6, t7, p7, t8, p8, t9, p9, t10, p10) \
typedef ret (*CONCAT(function, _hooktype)) (t1, t2, t3, t4, t5, t6, t7, t8, t9, t10); \
extern "C" __attribute__ ((visibility ("default"))) \
ret function(t1 p1, t2 p2, t3 p3, t4 p4, t5 p5, t6 p6, t7 p7, t8 p8, t9 p9, t10 p10) \
{ return OpenGLHook::glhooks.GetDriver()->function(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10); }
class OpenGLHook : LibraryHook
{
public:
OpenGLHook()
{
LibraryHooks::GetInstance().RegisterHook("libGL.so", this);
// TODO: need to check against implementation to ensure we don't claim to support
// an extension that it doesn't!
glXExts.push_back("GLX_ARB_extensions_string");
//glXExts.push_back("GLX_ARB_multisample");
glXExts.push_back("GLX_ARB_create_context");
glXExts.push_back("GLX_ARB_create_context_profile");
merge(glXExts, glXExtsString, ' ');
m_GLDriver = NULL;
m_EnabledHooks = true;
m_PopulatedHooks = false;
}
~OpenGLHook()
{
delete m_GLDriver;
}
bool CreateHooks(const char *libName)
{
RDCEraseEl(GL);
if(!m_EnabledHooks)
return false;
bool success = SetupHooks(GL);
if(!success) return false;
m_HasHooks = true;
return true;
}
void EnableHooks(const char *libName, bool enable)
{
m_EnabledHooks = enable;
}
static OpenGLHook glhooks;
const GLHookSet &GetRealFunctions()
{
if(!m_PopulatedHooks)
m_PopulatedHooks = PopulateHooks();
return GL;
}
WrappedOpenGL *GetDriver()
{
if(m_GLDriver == NULL)
m_GLDriver = new WrappedOpenGL(L"", GL);
return m_GLDriver;
}
PFNGLXCREATECONTEXTPROC glXCreateContext_real;
PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB_real;
PFNGLXGETPROCADDRESSPROC glXGetProcAddress_real;
PFNGLXMAKECURRENTPROC glXMakeCurrent_real;
PFNGLXSWAPBUFFERSPROC glXSwapBuffers_real;
WrappedOpenGL *m_GLDriver;
GLHookSet GL;
vector<string> glXExts;
string glXExtsString;
bool m_PopulatedHooks;
bool m_HasHooks;
bool m_EnabledHooks;
bool SetupHooks(GLHookSet &GL);
bool PopulateHooks();
};
DefineDLLExportHooks();
DefineGLExtensionHooks();
typedef XVisualInfo* (*PFNGLXGETVISUALFROMFBCONFIGPROC)(Display *dpy, GLXFBConfig config);
typedef int (*PFNGLXGETCONFIGPROC)(Display *dpy, XVisualInfo *vis, int attrib, int * value);
static PFNGLXGETCONFIGPROC getVisualInfoAttrib = NULL;
__attribute__ ((visibility ("default")))
GLXContext glXCreateContext(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct)
{
GLXContext ret = OpenGLHook::glhooks.glXCreateContext_real(dpy, vis, shareList, direct);
GLInitParams init;
init.width = 0;
init.height = 0;
int value = 0;
if(Keyboard::CurrentXDisplay == NULL) Keyboard::CurrentXDisplay = dpy;
if(getVisualInfoAttrib == NULL) getVisualInfoAttrib = (PFNGLXGETCONFIGPROC)dlsym(RTLD_NEXT, "glXGetConfig");
getVisualInfoAttrib(dpy, vis, GLX_BUFFER_SIZE, &value); init.colorBits = value;
getVisualInfoAttrib(dpy, vis, GLX_DEPTH_SIZE, &value); init.depthBits = value;
getVisualInfoAttrib(dpy, vis, GLX_STENCIL_SIZE, &value); init.stencilBits = value;
OpenGLHook::glhooks.GetDriver()->CreateContext(NULL, ret, shareList, init);
return ret;
}
__attribute__ ((visibility ("default")))
GLXContext glXCreateContextAttribsARB(Display *dpy, GLXFBConfig config, GLXContext shareList, Bool direct, const int *attribList)
{
GLXContext ret = OpenGLHook::glhooks.glXCreateContextAttribsARB_real(dpy, config, shareList, direct, attribList);
PFNGLXGETVISUALFROMFBCONFIGPROC getVisual = (PFNGLXGETVISUALFROMFBCONFIGPROC)dlsym(RTLD_NEXT, "glXGetVisualFromFBConfig");
XVisualInfo *vis = getVisual(dpy, config);
GLInitParams init;
init.width = 0;
init.height = 0;
int value = 0;
if(Keyboard::CurrentXDisplay == NULL) Keyboard::CurrentXDisplay = dpy;
if(getVisualInfoAttrib == NULL) getVisualInfoAttrib = (PFNGLXGETCONFIGPROC)dlsym(RTLD_NEXT, "glXGetConfig");
getVisualInfoAttrib(dpy, vis, GLX_BUFFER_SIZE, &value); init.colorBits = value;
getVisualInfoAttrib(dpy, vis, GLX_DEPTH_SIZE, &value); init.depthBits = value;
getVisualInfoAttrib(dpy, vis, GLX_STENCIL_SIZE, &value); init.stencilBits = value;
XFree(vis);
OpenGLHook::glhooks.GetDriver()->CreateContext(NULL, ret, shareList, init);
return ret;
}
__attribute__ ((visibility ("default")))
Bool glXMakeCurrent(Display *dpy, GLXDrawable drawable, GLXContext ctx)
{
Bool ret = OpenGLHook::glhooks.glXMakeCurrent_real(dpy, drawable, ctx);
OpenGLHook::glhooks.GetDriver()->ActivateContext((void *)drawable, ctx);
return ret;
}
__attribute__ ((visibility ("default")))
void glXSwapBuffers(Display *dpy, GLXDrawable drawable)
{
Window root;
int x, y;
unsigned int width, height, border_width, depth;
XGetGeometry(dpy, drawable, &root, &x, &y, &width, &height, &border_width, &depth);
OpenGLHook::glhooks.GetDriver()->WindowSize((void *)drawable, width, height);
OpenGLHook::glhooks.GetDriver()->Present((void *)drawable);
OpenGLHook::glhooks.glXSwapBuffers_real(dpy, drawable);
}
__attribute__ ((visibility ("default")))
const char *glXQueryExtensionsString(Display *dpy, int screen)
{
#if !defined(_RELEASE)
PFNGLXQUERYEXTENSIONSSTRING glXGetExtStr = (PFNGLXQUERYEXTENSIONSSTRING)dlsym(RTLD_NEXT, "glXQueryExtensionsString");
string realExtsString = glXGetExtStr(dpy, screen);
vector<string> realExts;
split(realExtsString, realExts, ' ');
#endif
return OpenGLHook::glhooks.glXExtsString.c_str();
}
bool OpenGLHook::SetupHooks(GLHookSet &GL)
{
bool success = true;
glXGetProcAddress_real = (PFNGLXGETPROCADDRESSPROC)dlsym(RTLD_NEXT, "glXGetProcAddress");
glXCreateContext_real = (PFNGLXCREATECONTEXTPROC)dlsym(RTLD_NEXT, "glXCreateContext");
glXCreateContextAttribsARB_real = (PFNGLXCREATECONTEXTATTRIBSARBPROC)dlsym(RTLD_NEXT, "glXCreateContextAttribsARB");
glXMakeCurrent_real = (PFNGLXMAKECURRENTPROC)dlsym(RTLD_NEXT, "glXMakeCurrent");
glXSwapBuffers_real = (PFNGLXSWAPBUFFERSPROC)dlsym(RTLD_NEXT, "glXSwapBuffers");
DLLExportHooks();
return success;
}
__attribute__ ((visibility ("default")))
__GLXextFuncPtr glXGetProcAddress(const GLubyte *f)
{
__GLXextFuncPtr realFunc = OpenGLHook::glhooks.glXGetProcAddress_real(f);
const char *func = (const char *)f;
// if the real RC doesn't support this function, don't bother hooking
if(realFunc == NULL)
return realFunc;
if(!strcmp(func, "glXCreateContextAttribsARB"))
{
OpenGLHook::glhooks.glXCreateContextAttribsARB_real = (PFNGLXCREATECONTEXTATTRIBSARBPROC)realFunc;
return (__GLXextFuncPtr)&glXCreateContextAttribsARB;
}
HookCheckGLExtensions();
// claim not to know this extension!
RDCWARN("Claiming not to know extension that is available - %s", func);
return NULL;
}
bool OpenGLHook::PopulateHooks()
{
bool success = true;
if(glXGetProcAddress_real == NULL)
glXGetProcAddress_real = (PFNGLXGETPROCADDRESSPROC)dlsym(RTLD_NEXT, "glXGetProcAddress");
glXGetProcAddress_real((const GLubyte *)"glXCreateContextAttribsARB");
#undef HookInit
#define HookInit(function) if(GL.function == NULL) GL.function = (CONCAT(function, _hooktype))dlsym(RTLD_NEXT, "glXGetProcAddress");
// cheeky
#undef HookExtension
#define HookExtension(funcPtrType, function) glXGetProcAddress((const GLubyte *)STRINGIZE(function))
#undef HookExtensionAlias
#define HookExtensionAlias(funcPtrType, function, alias)
DLLExportHooks();
HookCheckGLExtensions();
return true;
}
OpenGLHook OpenGLHook::glhooks;
const GLHookSet &GetRealFunctions() { return OpenGLHook::glhooks.GetRealFunctions(); }