Merge commit 'dec0d4ec4153bf9fc2b78ae6c2df45b6ea8dde7a' as 'external/sdl/SDL'

external/sdl/SDL/test/testrelative.c

@@ -0,0 +1,136 @@
+/*
+  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.
+*/
+
+/* Simple program:  Test relative mouse motion */
+
+#include <stdlib.h>
+#include <time.h>
+
+#include <SDL3/SDL_test_common.h>
+#include <SDL3/SDL_main.h>
+
+#ifdef __EMSCRIPTEN__
+#include <emscripten/emscripten.h>
+#endif
+
+static SDLTest_CommonState *state;
+static int i, done;
+static float mouseX, mouseY;
+static SDL_FRect rect;
+static SDL_Event event;
+
+static void DrawRects(SDL_Renderer *renderer)
+{
+    SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
+    rect.x = mouseX;
+    rect.y = mouseY;
+    SDL_RenderFillRect(renderer, &rect);
+}
+
+static void loop(void)
+{
+    /* Check for events */
+    while (SDL_PollEvent(&event)) {
+        SDLTest_CommonEvent(state, &event, &done);
+        switch (event.type) {
+        case SDL_EVENT_MOUSE_MOTION:
+        {
+            mouseX += event.motion.xrel;
+            mouseY += event.motion.yrel;
+        } break;
+        }
+    }
+    for (i = 0; i < state->num_windows; ++i) {
+        SDL_Rect viewport;
+        SDL_Renderer *renderer = state->renderers[i];
+        if (state->windows[i] == NULL) {
+            continue;
+        }
+        SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 0xFF);
+        SDL_RenderClear(renderer);
+
+        /* Wrap the cursor rectangle at the screen edges to keep it visible */
+        SDL_GetRenderViewport(renderer, &viewport);
+        if (rect.x < viewport.x) {
+            rect.x += viewport.w;
+        }
+        if (rect.y < viewport.y) {
+            rect.y += viewport.h;
+        }
+        if (rect.x > viewport.x + viewport.w) {
+            rect.x -= viewport.w;
+        }
+        if (rect.y > viewport.y + viewport.h) {
+            rect.y -= viewport.h;
+        }
+
+        DrawRects(renderer);
+
+        SDL_RenderPresent(renderer);
+    }
+#ifdef __EMSCRIPTEN__
+    if (done) {
+        emscripten_cancel_main_loop();
+    }
+#endif
+}
+
+int main(int argc, char *argv[])
+{
+
+    /* Enable standard application logging */
+    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
+
+    /* Initialize test framework */
+    state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
+    if (state == NULL) {
+        return 1;
+    }
+
+    /* Parse commandline */
+    if (!SDLTest_CommonDefaultArgs(state, argc, argv)) {
+        return 1;
+    }
+
+    if (!SDLTest_CommonInit(state)) {
+        return 2;
+    }
+
+    /* Create the windows and initialize the renderers */
+    for (i = 0; i < state->num_windows; ++i) {
+        SDL_Renderer *renderer = state->renderers[i];
+        SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_NONE);
+        SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
+        SDL_RenderClear(renderer);
+    }
+
+    srand((unsigned int)time(NULL));
+    if (SDL_SetRelativeMouseMode(SDL_TRUE) < 0) {
+        return 3;
+    }
+
+    rect.x = DEFAULT_WINDOW_WIDTH / 2;
+    rect.y = DEFAULT_WINDOW_HEIGHT / 2;
+    rect.w = 10;
+    rect.h = 10;
+    /* Main render loop */
+    done = 0;
+#ifdef __EMSCRIPTEN__
+    emscripten_set_main_loop(loop, 0, 1);
+#else
+    while (!done) {
+        loop();
+    }
+#endif
+    SDLTest_CommonQuit(state);
+    return 0;
+}