103 lines
3.2 KiB
C
103 lines
3.2 KiB
C
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#ifndef HOOKS_H_
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#define HOOKS_H_
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/*----------------------------------------------------------------------------*/
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#include "sdk.h"
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#include <dlfcn.h> /* dlsym */
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#include <GL/gl.h> /* GLFloat */
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/*
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* Table of prefixes:
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* prefix | meaning
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* -------+----------------------------
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* *_t | typedef (function type)
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* h_* | hook function (ours)
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* ho_* | hook original (ptr to orig)
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* hp_* | hook pointer (pointer to function pointer)
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*
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*
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* DECL_HOOK_EXTERN: Version for the header. typedef's the function pointer with
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* the return type, name and args. Example:
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*
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* DECL_HOOK_EXTERN(int, test, double, double);
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* typedef int (*test_t)(double, double);
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* extern test_t ho_test; // Original
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* int h_test(double, double); // Our func
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*
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*
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* DECL_HOOK: Macro for declaring the global function pointer for the original
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* in the source file. Example:
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*
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* DECL_HOOK(test);
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* test_t ho_test = NULL; // Original
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*
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*
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* HOOK: Macro for storing the original function ptr of an interface and hooking
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* our own. Example:
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*
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* HOOK(gp_client, CL_CreateMove);
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* ho_CL_CreateMove = gp_client->CL_CreateMove; // Original
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* gp_client->CL_CreateMove = h_CL_CreateMove; // Our func
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*
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*
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* ORIGINAL: Macro for calling the original function. Example:
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*
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* ORIGINAL(CL_CreateMove, frametime, cmd, active);
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* ho_CL_CreateMove(frametime, cmd, active); // Original
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*
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*
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* GL_HOOK: Hooks a OpenGL function. Example:
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*
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* GL_HOOK(glColor4f);
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* void** hp_glColor4f = (void**)dlsym(hw, "qglColor4f"); // Ptr
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* ho_glColor4f = (glColor4f_t)(*hp_glColor4f); // Original from ptr
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* *hp_glColor4f = (void*)h_glColor4f; // Set ptr to our func
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* Note: ho_glColor4f and h_glColor4f sould be declared with DECL_HOOK_EXTERN
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*
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*
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* GL_UNHOOK: Restores a OpenGL hook created by GL_HOOK. Example:
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*
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* GL_UNHOOK(glColor4f);
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* void** hp_glColor4f = (void**)dlsym(hw, "qglColor4f"); // Ptr
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* *hp_glColor4f = (void*)ho_glColor4f; // Set to original
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*/
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#define DECL_HOOK_EXTERN(type, name, ...) \
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typedef type (*name##_t)(__VA_ARGS__); \
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extern name##_t ho_##name; \
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type h_##name(__VA_ARGS__);
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#define DECL_HOOK(name) name##_t ho_##name = NULL;
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#define HOOK(interface, name) \
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ho_##name = interface->name; \
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interface->name = h_##name;
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#define ORIGINAL(name, ...) ho_##name(__VA_ARGS__);
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#define GL_HOOK(name) \
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void** hp_##name = (void**)dlsym(hw, "q" #name); \
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ho_##name = (name##_t)(*hp_##name); \
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*hp_##name = (void*)h_##name;
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#define GL_UNHOOK(name) \
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void** hp_##name = (void**)dlsym(hw, "q" #name); \
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*hp_##name = (void*)ho_##name;
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/*----------------------------------------------------------------------------*/
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bool hooks_init(void);
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void hooks_restore(void);
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DECL_HOOK_EXTERN(void, CL_CreateMove, float, usercmd_t*, int);
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DECL_HOOK_EXTERN(int, HUD_Redraw, float, int);
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DECL_HOOK_EXTERN(void, StudioRenderModel, void* this_ptr);
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DECL_HOOK_EXTERN(void, glColor4f, GLfloat r, GLfloat g, GLfloat b, GLfloat a);
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DECL_HOOK_EXTERN(void, CL_Move);
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#endif /* HOOKS_H_ */
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