feat(gx): add incomplete 'CGxDeviceGLSDL' (#2)

* chore(build): add vendored SDL 3.0.0 library

* chore(build): add vendored glew-cmake-2.2.0 library

* feat(console): in the presence of -opengl launch flag, change GxApi to OpenGl

* feat(gx): add uncompleted CGxDeviceGLSDL targeting Windows and Linux

* chore(build): change SDL3 linkage from shared (bad) to to static (good)

vendor/sdl-3.0.0/src/video/android/SDL_androidmouse.c

@@ -0,0 +1,253 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_internal.h"
+
+#ifdef SDL_VIDEO_DRIVER_ANDROID
+
+#include "SDL_androidmouse.h"
+
+#include "../../events/SDL_mouse_c.h"
+
+#include "../../core/android/SDL_android.h"
+
+/* See Android's MotionEvent class for constants */
+#define ACTION_DOWN       0
+#define ACTION_UP         1
+#define ACTION_MOVE       2
+#define ACTION_HOVER_MOVE 7
+#define ACTION_SCROLL     8
+#define BUTTON_PRIMARY    1
+#define BUTTON_SECONDARY  2
+#define BUTTON_TERTIARY   4
+#define BUTTON_BACK       8
+#define BUTTON_FORWARD    16
+
+typedef struct
+{
+    int custom_cursor;
+    int system_cursor;
+
+} SDL_AndroidCursorData;
+
+/* Last known Android mouse button state (includes all buttons) */
+static int last_state;
+
+/* Blank cursor */
+static SDL_Cursor *empty_cursor;
+
+static SDL_Cursor *Android_WrapCursor(int custom_cursor, int system_cursor)
+{
+    SDL_Cursor *cursor;
+
+    cursor = SDL_calloc(1, sizeof(*cursor));
+    if (cursor) {
+        SDL_AndroidCursorData *data = (SDL_AndroidCursorData *)SDL_calloc(1, sizeof(*data));
+        if (data) {
+            data->custom_cursor = custom_cursor;
+            data->system_cursor = system_cursor;
+            cursor->driverdata = data;
+        } else {
+            SDL_free(cursor);
+            cursor = NULL;
+            SDL_OutOfMemory();
+        }
+    } else {
+        SDL_OutOfMemory();
+    }
+
+    return cursor;
+}
+
+static SDL_Cursor *Android_CreateDefaultCursor()
+{
+    return Android_WrapCursor(0, SDL_SYSTEM_CURSOR_ARROW);
+}
+
+static SDL_Cursor *Android_CreateCursor(SDL_Surface *surface, int hot_x, int hot_y)
+{
+    int custom_cursor;
+    SDL_Surface *converted;
+
+    converted = SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_ARGB8888);
+    if (converted == NULL) {
+        return NULL;
+    }
+    custom_cursor = Android_JNI_CreateCustomCursor(converted, hot_x, hot_y);
+    SDL_DestroySurface(converted);
+    if (!custom_cursor) {
+        SDL_Unsupported();
+        return NULL;
+    }
+    return Android_WrapCursor(custom_cursor, 0);
+}
+
+static SDL_Cursor *Android_CreateSystemCursor(SDL_SystemCursor id)
+{
+    return Android_WrapCursor(0, id);
+}
+
+static void Android_FreeCursor(SDL_Cursor *cursor)
+{
+    SDL_AndroidCursorData *data = (SDL_AndroidCursorData *)cursor->driverdata;
+    if (data->custom_cursor != 0) {
+        Android_JNI_DestroyCustomCursor(data->custom_cursor);
+    }
+    SDL_free(cursor->driverdata);
+    SDL_free(cursor);
+}
+
+static SDL_Cursor *Android_CreateEmptyCursor()
+{
+    if (empty_cursor == NULL) {
+        SDL_Surface *empty_surface = SDL_CreateSurface(1, 1, SDL_PIXELFORMAT_ARGB8888);
+        if (empty_surface) {
+            SDL_memset(empty_surface->pixels, 0, (size_t)empty_surface->h * empty_surface->pitch);
+            empty_cursor = Android_CreateCursor(empty_surface, 0, 0);
+            SDL_DestroySurface(empty_surface);
+        }
+    }
+    return empty_cursor;
+}
+
+static void Android_DestroyEmptyCursor()
+{
+    if (empty_cursor) {
+        Android_FreeCursor(empty_cursor);
+        empty_cursor = NULL;
+    }
+}
+
+static int Android_ShowCursor(SDL_Cursor *cursor)
+{
+    if (cursor == NULL) {
+        cursor = Android_CreateEmptyCursor();
+    }
+    if (cursor) {
+        SDL_AndroidCursorData *data = (SDL_AndroidCursorData *)cursor->driverdata;
+        if (data->custom_cursor) {
+            if (!Android_JNI_SetCustomCursor(data->custom_cursor)) {
+                return SDL_Unsupported();
+            }
+        } else {
+            if (!Android_JNI_SetSystemCursor(data->system_cursor)) {
+                return SDL_Unsupported();
+            }
+        }
+        return 0;
+    } else {
+        /* SDL error set inside Android_CreateEmptyCursor() */
+        return -1;
+    }
+}
+
+static int Android_SetRelativeMouseMode(SDL_bool enabled)
+{
+    if (!Android_JNI_SupportsRelativeMouse()) {
+        return SDL_Unsupported();
+    }
+
+    if (!Android_JNI_SetRelativeMouseEnabled(enabled)) {
+        return SDL_Unsupported();
+    }
+
+    return 0;
+}
+
+void Android_InitMouse(void)
+{
+    SDL_Mouse *mouse = SDL_GetMouse();
+
+    mouse->CreateCursor = Android_CreateCursor;
+    mouse->CreateSystemCursor = Android_CreateSystemCursor;
+    mouse->ShowCursor = Android_ShowCursor;
+    mouse->FreeCursor = Android_FreeCursor;
+    mouse->SetRelativeMouseMode = Android_SetRelativeMouseMode;
+
+    SDL_SetDefaultCursor(Android_CreateDefaultCursor());
+
+    last_state = 0;
+}
+
+void Android_QuitMouse(void)
+{
+    Android_DestroyEmptyCursor();
+}
+
+/* Translate Android mouse button state to SDL mouse button */
+static Uint8 TranslateButton(int state)
+{
+    if (state & BUTTON_PRIMARY) {
+        return SDL_BUTTON_LEFT;
+    } else if (state & BUTTON_SECONDARY) {
+        return SDL_BUTTON_RIGHT;
+    } else if (state & BUTTON_TERTIARY) {
+        return SDL_BUTTON_MIDDLE;
+    } else if (state & BUTTON_FORWARD) {
+        return SDL_BUTTON_X1;
+    } else if (state & BUTTON_BACK) {
+        return SDL_BUTTON_X2;
+    } else {
+        return 0;
+    }
+}
+
+void Android_OnMouse(SDL_Window *window, int state, int action, float x, float y, SDL_bool relative)
+{
+    int changes;
+    Uint8 button;
+
+    if (window == NULL) {
+        return;
+    }
+
+    switch (action) {
+    case ACTION_DOWN:
+        changes = state & ~last_state;
+        button = TranslateButton(changes);
+        last_state = state;
+        SDL_SendMouseMotion(0, window, 0, relative, x, y);
+        SDL_SendMouseButton(0, window, 0, SDL_PRESSED, button);
+        break;
+
+    case ACTION_UP:
+        changes = last_state & ~state;
+        button = TranslateButton(changes);
+        last_state = state;
+        SDL_SendMouseMotion(0, window, 0, relative, x, y);
+        SDL_SendMouseButton(0, window, 0, SDL_RELEASED, button);
+        break;
+
+    case ACTION_MOVE:
+    case ACTION_HOVER_MOVE:
+        SDL_SendMouseMotion(0, window, 0, relative, x, y);
+        break;
+
+    case ACTION_SCROLL:
+        SDL_SendMouseWheel(0, window, 0, x, y, SDL_MOUSEWHEEL_NORMAL);
+        break;
+
+    default:
+        break;
+    }
+}
+
+#endif /* SDL_VIDEO_DRIVER_ANDROID */