Allow passing 0 to SDL_SetWindowMinimumSize() and SDL_SetWindowMaximumSize() to indicate no limit

include/SDL3/SDL_video.h

@@ -1009,8 +1009,8 @@ extern DECLSPEC int SDLCALL SDL_GetWindowSizeInPixels(SDL_Window *window, int *w
  * Set the minimum size of a window's client area, in screen coordinates.
  *
  * \param window the window to change
- * \param min_w the minimum width of the window
- * \param min_h the minimum height of the window
+ * \param min_w the minimum width of the window, or 0 for no limit
+ * \param min_h the minimum height of the window, or 0 for no limit
  * \returns 0 on success or a negative error code on failure; call
  *          SDL_GetError() for more information.
  *
@@ -1043,8 +1043,8 @@ extern DECLSPEC int SDLCALL SDL_GetWindowMinimumSize(SDL_Window *window, int *w,
  * Set the maximum size of a window's client area, in screen coordinates.
  *
  * \param window the window to change
- * \param max_w the maximum width of the window
- * \param max_h the maximum height of the window
+ * \param max_w the maximum width of the window, or 0 for no limit
+ * \param max_h the maximum height of the window, or 0 for no limit
  * \returns 0 on success or a negative error code on failure; call
  *          SDL_GetError() for more information.
  *

src/video/SDL_video.c

@@ -2611,10 +2611,10 @@ int SDL_GetWindowSizeInPixels(SDL_Window *window, int *w, int *h)
 int SDL_SetWindowMinimumSize(SDL_Window *window, int min_w, int min_h)
 {
     CHECK_WINDOW_MAGIC(window, -1);
-    if (min_w <= 0) {
+    if (min_w < 0) {
         return SDL_InvalidParamError("min_w");
     }
-    if (min_h <= 0) {
+    if (min_h < 0) {
         return SDL_InvalidParamError("min_h");
     }
 
@@ -2627,11 +2627,16 @@ int SDL_SetWindowMinimumSize(SDL_Window *window, int min_w, int min_h)
     window->min_h = min_h;
 
     if (!(window->flags & SDL_WINDOW_FULLSCREEN)) {
+        int w, h;
+
         if (_this->SetWindowMinimumSize) {
             _this->SetWindowMinimumSize(_this, window);
         }
+
         /* Ensure that window is not smaller than minimal size */
-        return SDL_SetWindowSize(window, SDL_max(window->w, window->min_w), SDL_max(window->h, window->min_h));
+        w = window->min_w ? SDL_max(window->w, window->min_w) : window->w;
+        h = window->min_h ? SDL_max(window->h, window->min_h) : window->h;
+        return SDL_SetWindowSize(window, w, h);
     }
     return 0;
 }
@@ -2651,10 +2656,10 @@ int SDL_GetWindowMinimumSize(SDL_Window *window, int *min_w, int *min_h)
 int SDL_SetWindowMaximumSize(SDL_Window *window, int max_w, int max_h)
 {
     CHECK_WINDOW_MAGIC(window, -1);
-    if (max_w <= 0) {
+    if (max_w < 0) {
         return SDL_InvalidParamError("max_w");
     }
-    if (max_h <= 0) {
+    if (max_h < 0) {
         return SDL_InvalidParamError("max_h");
     }
 
@@ -2666,11 +2671,16 @@ int SDL_SetWindowMaximumSize(SDL_Window *window, int max_w, int max_h)
     window->max_h = max_h;
 
     if (!(window->flags & SDL_WINDOW_FULLSCREEN)) {
+        int w, h;
+
         if (_this->SetWindowMaximumSize) {
             _this->SetWindowMaximumSize(_this, window);
         }
+
         /* Ensure that window is not larger than maximal size */
-        return SDL_SetWindowSize(window, SDL_min(window->w, window->max_w), SDL_min(window->h, window->max_h));
+        w = window->max_w ? SDL_min(window->w, window->max_w) : window->w;
+        h = window->max_h ? SDL_min(window->h, window->max_h) : window->h;
+        return SDL_SetWindowSize(window, w, h);
     }
     return 0;
 }

test/testautomation_video.c

@@ -1141,7 +1141,7 @@ static int video_getSetWindowMinimumSize(void *arg)
     SDLTest_AssertPass("Call to SDL_ClearError()");
     for (desiredH = -2; desiredH < 2; desiredH++) {
         for (desiredW = -2; desiredW < 2; desiredW++) {
-            if (desiredW <= 0 || desiredH <= 0) {
+            if (desiredW < 0 || desiredH < 0) {
                 SDL_SetWindowMinimumSize(window, desiredW, desiredH);
                 SDLTest_AssertPass("Call to SDL_SetWindowMinimumSize(...,%d,%d)", desiredW, desiredH);
                 checkInvalidParameterError();
@@ -1279,7 +1279,7 @@ static int video_getSetWindowMaximumSize(void *arg)
     SDLTest_AssertPass("Call to SDL_ClearError()");
     for (desiredH = -2; desiredH < 2; desiredH++) {
         for (desiredW = -2; desiredW < 2; desiredW++) {
-            if (desiredW <= 0 || desiredH <= 0) {
+            if (desiredW < 0 || desiredH < 0) {
                 SDL_SetWindowMaximumSize(window, desiredW, desiredH);
                 SDLTest_AssertPass("Call to SDL_SetWindowMaximumSize(...,%d,%d)", desiredW, desiredH);
                 checkInvalidParameterError();