Added SDL 1c0f6952e65e.

libs/SDL2/test/testrelative.c

@@ -18,24 +18,62 @@
 
 #include "SDL_test_common.h"
 
+#ifdef __EMSCRIPTEN__
+#include <emscripten/emscripten.h>
+#endif
 
 static SDLTest_CommonState *state;
-static SDL_Rect rect;
+int i, done;
+SDL_Rect rect;
+SDL_Event event;
 
 static void
-DrawRects(SDL_Renderer * renderer)
+DrawRects(SDL_Renderer * renderer, SDL_Rect * rect)
 {
     SDL_SetRenderDrawColor(renderer, 255, 127, 0, 255);
-    SDL_RenderFillRect(renderer,&rect);
+    SDL_RenderFillRect(renderer, rect);
+}
+
+static void
+loop(){
+    /* Check for events */
+    while (SDL_PollEvent(&event)) {
+        SDLTest_CommonEvent(state, &event, &done);
+        switch(event.type) {
+        case SDL_MOUSEMOTION:
+            {
+                rect.x += event.motion.xrel;
+                rect.y += 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, 0xA0, 0xA0, 0xA0, 0xFF);
+        SDL_RenderClear(renderer);
+
+        /* Wrap the cursor rectangle at the screen edges to keep it visible */
+        SDL_RenderGetViewport(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, &rect);
+
+        SDL_RenderPresent(renderer);
+    }
 }
 
 int
 main(int argc, char *argv[])
 {
-    int i, done;
-    SDL_Event event;
 
-	/* Enable standard application logging */
+    /* Enable standard application logging */
     SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
 
     /* Initialize test framework */
@@ -43,7 +81,7 @@ main(int argc, char *argv[])
     if (!state) {
         return 1;
     }
-    for (i = 1; i < argc;i++) {
+    for (i = 1; i < argc; ++i) {
         SDLTest_CommonArg(state, i);
     }
     if (!SDLTest_CommonInit(state)) {
@@ -69,32 +107,13 @@ main(int argc, char *argv[])
     rect.h = 10;
     /* Main render loop */
     done = 0;
+#ifdef __EMSCRIPTEN__
+    emscripten_set_main_loop(loop, 0, 1);
+#else
     while (!done) {
-        /* Check for events */
-        while (SDL_PollEvent(&event)) {
-            SDLTest_CommonEvent(state, &event, &done);
-            switch(event.type) {
-                case SDL_MOUSEMOTION:
-                {
-                    rect.x += event.motion.xrel;
-                    rect.y += event.motion.yrel;
-                }
-                break;
-            }
+        loop();
         }
-        for (i = 0; i < state->num_windows; ++i) {
-            SDL_Renderer *renderer = state->renderers[i];
-            if (state->windows[i] == NULL)
-                continue;
-            SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
-            SDL_RenderClear(renderer);
-
-            DrawRects(renderer);
-
-            SDL_RenderPresent(renderer);
-        }
-    }
-
+#endif
     SDLTest_CommonQuit(state);
     return 0;
 }