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Add glColor4f hook

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Add GL_HOOK and GL_UNHOOK macros
This commit is contained in:
8dcc
2023-07-25 14:20:38 +02:00
parent fdb5cdf356
commit b6cdb9a55d
2 changed files with 47 additions and 0 deletions
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31
src/include/hooks.h
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@@ -6,6 +6,8 @@
#include "sdk.h"
#include <dlfcn.h> /* dlsym */
#include <GL/gl.h> /* GLFloat */
/*
* Table of prefixes:
* prefix | meaning
@@ -13,6 +15,7 @@
* *_t | typedef (function type)
* h_* | hook function (ours)
* ho_* | hook original (ptr to orig)
* hp_* | hook pointer (pointer to function pointer)
*
*
* DECL_HOOK_EXTERN: Version for the header. typedef's the function pointer with
@@ -43,6 +46,23 @@
*
* ORIGINAL(CL_CreateMove, frametime, cmd, active);
* ho_CL_CreateMove(frametime, cmd, active); // Original
*
*
* GL_HOOK: Hooks a OpenGL function. Example:
*
* GL_HOOK(glColor4f);
* void** hp_glColor4f = (void**)dlsym(hw, "qglColor4f"); // Ptr
* ho_glColor4f = (glColor4f_t)(*hp_glColor4f); // Original from ptr
* *hp_glColor4f = (void*)h_glColor4f; // Set ptr to our func
* Note: ho_glColor4f and h_glColor4f sould be declared with DECL_HOOK_EXTERN
*
*
* GL_UNHOOK: Restores a OpenGL hook created by GL_HOOK. Example:
*
* GL_UNHOOK(glColor4f);
* void** hp_glColor4f = (void**)dlsym(hw, "qglColor4f"); // Ptr
* *hp_glColor4f = (void*)ho_glColor4f; // Set to original
*/
#define DECL_HOOK_EXTERN(type, name, ...) \
typedef type (*name##_t)(__VA_ARGS__); \
@@ -57,6 +77,15 @@
#define ORIGINAL(name, ...) ho_##name(__VA_ARGS__);
#define GL_HOOK(name) \
void** hp_##name = (void**)dlsym(hw, "q" #name); \
ho_##name = (name##_t)(*hp_##name); \
*hp_##name = (void*)h_##name;
#define GL_UNHOOK(name) \
void** hp_##name = (void**)dlsym(hw, "q" #name); \
*hp_##name = (void*)ho_##name;
/*----------------------------------------------------------------------------*/
bool hooks_init(void);
@@ -64,4 +93,6 @@ DECL_HOOK_EXTERN(void, CL_CreateMove, float, usercmd_t*, int);
DECL_HOOK_EXTERN(int, HUD_Redraw, float, int);
DECL_HOOK_EXTERN(void, StudioRenderModel, void* this_ptr);
DECL_HOOK_EXTERN(void, glColor4f, GLfloat r, GLfloat g, GLfloat b, GLfloat a);
#endif /* HOOKS_H_ */