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Windows: Load wgl functions dynamically

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UnknownShadow200 2025-01-11 07:16:24 +11:00
parent 5092b5ac7f
commit a0f652cb8c
2 changed files with 26 additions and 15 deletions
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37
src/Window_Win.c
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@ -824,11 +824,16 @@ void Window_DisableRawMouse(void) {
#if CC_GFX_BACKEND_IS_GL() && !defined CC_BUILD_EGL #if CC_GFX_BACKEND_IS_GL() && !defined CC_BUILD_EGL
static HGLRC ctx_handle; static HGLRC ctx_handle;
static HDC ctx_DC; static HDC ctx_DC;
static void* gl_lib;
static HGLRC (WINAPI *_wglCreateContext)(HDC dc);
static BOOL (WINAPI *_wglDeleteContext)(HGLRC glrc);
static HDC (WINAPI *_wglGetCurrentDC)(void);
static BOOL (WINAPI *_wglMakeCurrent)(HDC dc, HGLRC glrc);
static PROC (WINAPI *_wglGetProcAddress)(LPCSTR func);
typedef BOOL (WINAPI *FP_SWAPINTERVAL)(int interval); typedef BOOL (WINAPI *FP_SWAPINTERVAL)(int interval);
static FP_SWAPINTERVAL wglSwapIntervalEXT; static FP_SWAPINTERVAL _wglSwapIntervalEXT;
static void* gl_lib;
static void GLContext_SelectGraphicsMode(struct GraphicsMode* mode) { static void GLContext_SelectGraphicsMode(struct GraphicsMode* mode) {
PIXELFORMATDESCRIPTOR pfd = { 0 }; PIXELFORMATDESCRIPTOR pfd = { 0 };
@ -859,41 +864,47 @@ static void GLContext_SelectGraphicsMode(struct GraphicsMode* mode) {
} }
void GLContext_Create(void) { void GLContext_Create(void) {
static const struct DynamicLibSym funcs[] = {
DynamicLib_ReqSym(wglCreateContext),
DynamicLib_ReqSym(wglDeleteContext),
DynamicLib_ReqSym(wglGetCurrentDC),
DynamicLib_ReqSym(wglMakeCurrent),
DynamicLib_OptSym(wglGetProcAddress)
};
static const cc_string glPath = String_FromConst("OPENGL32.dll"); static const cc_string glPath = String_FromConst("OPENGL32.dll");
struct GraphicsMode mode; struct GraphicsMode mode;
InitGraphicsMode(&mode); InitGraphicsMode(&mode);
GLContext_SelectGraphicsMode(&mode); GLContext_SelectGraphicsMode(&mode);
gl_lib = DynamicLib_Load2(&glPath); DynamicLib_LoadAll(&glPath, funcs, Array_Elems(funcs), &gl_lib);
ctx_handle = wglCreateContext(win_DC); ctx_handle = _wglCreateContext(win_DC);
if (!ctx_handle) { if (!ctx_handle) {
Process_Abort2(GetLastError(), "Failed to create OpenGL context"); Process_Abort2(GetLastError(), "Failed to create OpenGL context");
} }
if (!wglMakeCurrent(win_DC, ctx_handle)) { if (!_wglMakeCurrent(win_DC, ctx_handle)) {
Process_Abort2(GetLastError(), "Failed to make OpenGL context current"); Process_Abort2(GetLastError(), "Failed to make OpenGL context current");
} }
ctx_DC = wglGetCurrentDC(); ctx_DC = _wglGetCurrentDC();
wglSwapIntervalEXT = (FP_SWAPINTERVAL)GLContext_GetAddress("wglSwapIntervalEXT"); _wglSwapIntervalEXT = (FP_SWAPINTERVAL)GLContext_GetAddress("wglSwapIntervalEXT");
} }
void GLContext_Update(void) { } void GLContext_Update(void) { }
cc_bool GLContext_TryRestore(void) { return true; } cc_bool GLContext_TryRestore(void) { return true; }
void GLContext_Free(void) { void GLContext_Free(void) {
if (!ctx_handle) return; if (!ctx_handle) return;
wglDeleteContext(ctx_handle); _wglDeleteContext(ctx_handle);
ctx_handle = NULL; ctx_handle = NULL;
} }
static PROC (WINAPI *_wglGetProcAddress)(LPCSTR func);
/* https://www.khronos.org/opengl/wiki/Load_OpenGL_Functions#Windows */ /* https://www.khronos.org/opengl/wiki/Load_OpenGL_Functions#Windows */
#define GLContext_IsInvalidAddress(ptr) (ptr == (void*)0 || ptr == (void*)1 || ptr == (void*)-1 || ptr == (void*)2) #define GLContext_IsInvalidAddress(ptr) (ptr == (void*)0 || ptr == (void*)1 || ptr == (void*)-1 || ptr == (void*)2)
void* GLContext_GetAddress(const char* function) { void* GLContext_GetAddress(const char* function) {
/* Not present on NT 3.5 */ /* Not present on NT 3.5 */
if (!_wglGetProcAddress) _wglGetProcAddress = DynamicLib_Get2(gl_lib, "wglGetProcAddress");
if (_wglGetProcAddress) { if (_wglGetProcAddress) {
void* addr = (void*)_wglGetProcAddress(function); void* addr = (void*)_wglGetProcAddress(function);
if (!GLContext_IsInvalidAddress(addr)) return addr; if (!GLContext_IsInvalidAddress(addr)) return addr;
@ -909,8 +920,8 @@ cc_bool GLContext_SwapBuffers(void) {
} }
void GLContext_SetVSync(cc_bool vsync) { void GLContext_SetVSync(cc_bool vsync) {
if (!wglSwapIntervalEXT) return; if (!_wglSwapIntervalEXT) return;
wglSwapIntervalEXT(vsync); _wglSwapIntervalEXT(vsync);
} }
void GLContext_GetApiInfo(cc_string* info) { } void GLContext_GetApiInfo(cc_string* info) { }
#endif #endif