Added SDL_HINT_OPENGL_LIBRARY and SDL_HINT_VULKAN_LIBRARY

include/SDL3/SDL_hints.h

@@ -2436,6 +2436,15 @@ extern "C" {
  */
 #define SDL_HINT_NO_SIGNAL_HANDLERS   "SDL_NO_SIGNAL_HANDLERS"
 
+/**
+ * Specify the OpenGL library to load.
+ *
+ * This hint should be set before creating an OpenGL window or creating an OpenGL context.
+ *
+ * \since This hint is available since SDL 3.0.0.
+ */
+#define SDL_HINT_OPENGL_LIBRARY "SDL_OPENGL_LIBRARY"
+
 /**
  * A variable controlling what driver to use for OpenGL ES contexts.
  *
@@ -3341,6 +3350,15 @@ extern "C" {
  */
 #define SDL_HINT_VITA_TOUCH_MOUSE_DEVICE    "SDL_VITA_TOUCH_MOUSE_DEVICE"
 
+/**
+ * Specify the Vulkan library to load.
+ *
+ * This hint should be set before creating a Vulkan window or calling SDL_Vulkan_LoadLibrary().
+ *
+ * \since This hint is available since SDL 3.0.0.
+ */
+#define SDL_HINT_VULKAN_LIBRARY "SDL_VULKAN_LIBRARY"
+
 /**
  * A variable controlling how the fact chunk affects the loading of a WAVE
  * file.

src/video/android/SDL_androidvulkan.c

@@ -49,7 +49,7 @@ int Android_Vulkan_LoadLibrary(SDL_VideoDevice *_this, const char *path)
 
     /* Load the Vulkan loader library */
     if (!path) {
-        path = SDL_getenv("SDL_VULKAN_LIBRARY");
+        path = SDL_GetHint(SDL_HINT_VULKAN_LIBRARY);
     }
     if (!path) {
         path = "libvulkan.so";

src/video/cocoa/SDL_cocoaopengl.m

@@ -229,7 +229,7 @@ int Cocoa_GL_LoadLibrary(SDL_VideoDevice *_this, const char *path)
 {
     /* Load the OpenGL library */
     if (path == NULL) {
-        path = SDL_getenv("SDL_OPENGL_LIBRARY");
+        path = SDL_GetHint(SDL_HINT_OPENGL_LIBRARY);
     }
     if (path == NULL) {
         path = DEFAULT_OPENGL;

src/video/cocoa/SDL_cocoavulkan.m

@@ -61,7 +61,7 @@ int Cocoa_Vulkan_LoadLibrary(SDL_VideoDevice *_this, const char *path)
 
     /* Load the Vulkan loader library */
     if (!path) {
-        path = SDL_getenv("SDL_VULKAN_LIBRARY");
+        path = SDL_GetHint(SDL_HINT_VULKAN_LIBRARY);
     }
 
     if (!path) {

src/video/kmsdrm/SDL_kmsdrmvulkan.c

@@ -56,7 +56,7 @@ int KMSDRM_Vulkan_LoadLibrary(SDL_VideoDevice *_this, const char *path)
 
     /* Load the Vulkan library */
     if (!path) {
-        path = SDL_getenv("SDL_VULKAN_LIBRARY");
+        path = SDL_GetHint(SDL_HINT_VULKAN_LIBRARY);
     }
     if (!path) {
         path = DEFAULT_VULKAN;

src/video/offscreen/SDL_offscreenvulkan.c

@@ -74,7 +74,7 @@ int OFFSCREEN_Vulkan_LoadLibrary(SDL_VideoDevice *_this, const char *path)
 
     /* Load the Vulkan loader library */
     if (!path) {
-        path = SDL_getenv("SDL_VULKAN_LIBRARY");
+        path = SDL_GetHint(SDL_HINT_VULKAN_LIBRARY);
     }
 
 #if defined(SDL_PLATFORM_APPLE)

src/video/uikit/SDL_uikitvulkan.m

@@ -59,7 +59,7 @@ int UIKit_Vulkan_LoadLibrary(SDL_VideoDevice *_this, const char *path)
 
     /* Load the Vulkan loader library */
     if (!path) {
-        path = SDL_getenv("SDL_VULKAN_LIBRARY");
+        path = SDL_GetHint(SDL_HINT_VULKAN_LIBRARY);
     }
 
     if (!path) {

src/video/vivante/SDL_vivantevulkan.c

@@ -47,7 +47,7 @@ int VIVANTE_Vulkan_LoadLibrary(SDL_VideoDevice *_this, const char *path)
 
     /* Load the Vulkan loader library */
     if (!path) {
-        path = SDL_getenv("SDL_VULKAN_LIBRARY");
+        path = SDL_GetHint(SDL_HINT_VULKAN_LIBRARY);
     }
     if (!path) {
         /* If no path set, try Vivante fb vulkan driver explicitly */

src/video/wayland/SDL_waylandvulkan.c

@@ -54,7 +54,7 @@ int Wayland_Vulkan_LoadLibrary(SDL_VideoDevice *_this, const char *path)
 
     /* Load the Vulkan loader library */
     if (!path) {
-        path = SDL_getenv("SDL_VULKAN_LIBRARY");
+        path = SDL_GetHint(SDL_HINT_VULKAN_LIBRARY);
     }
     if (!path) {
         path = DEFAULT_VULKAN;

src/video/windows/SDL_windowsopengl.c

@@ -110,7 +110,7 @@ int WIN_GL_LoadLibrary(SDL_VideoDevice *_this, const char *path)
     void *handle;
 
     if (path == NULL) {
-        path = SDL_getenv("SDL_OPENGL_LIBRARY");
+        path = SDL_GetHint(SDL_HINT_OPENGL_LIBRARY);
     }
     if (path == NULL) {
         path = DEFAULT_OPENGL;

src/video/windows/SDL_windowsvulkan.c

@@ -49,7 +49,7 @@ int WIN_Vulkan_LoadLibrary(SDL_VideoDevice *_this, const char *path)
 
     /* Load the Vulkan loader library */
     if (!path) {
-        path = SDL_getenv("SDL_VULKAN_LIBRARY");
+        path = SDL_GetHint(SDL_HINT_VULKAN_LIBRARY);
     }
     if (!path) {
         path = "vulkan-1.dll";

src/video/x11/SDL_x11opengl.c

@@ -172,7 +172,7 @@ int X11_GL_LoadLibrary(SDL_VideoDevice *_this, const char *path)
 
     /* Load the OpenGL library */
     if (path == NULL) {
-        path = SDL_getenv("SDL_OPENGL_LIBRARY");
+        path = SDL_GetHint(SDL_HINT_OPENGL_LIBRARY);
     }
     if (path == NULL) {
         path = DEFAULT_OPENGL;

src/video/x11/SDL_x11vulkan.c

@@ -58,7 +58,7 @@ int X11_Vulkan_LoadLibrary(SDL_VideoDevice *_this, const char *path)
 
     /* Load the Vulkan loader library */
     if (!path) {
-        path = SDL_getenv("SDL_VULKAN_LIBRARY");
+        path = SDL_GetHint(SDL_HINT_VULKAN_LIBRARY);
     }
     if (!path) {
         path = DEFAULT_VULKAN;