Add patch

Author: xtyxtyx

patches/0007-sync-mouse-button-state.patch

@@ -0,0 +1,71 @@
+diff --git a/Sources/SwiftSDL3/src/video/cocoa/SDL_cocoawindow.m b/Sources/SwiftSDL3/src/video/cocoa/SDL_cocoawindow.m
+index 3425737..859b9f3 100644
+--- a/Sources/SwiftSDL3/src/video/cocoa/SDL_cocoawindow.m
++++ b/Sources/SwiftSDL3/src/video/cocoa/SDL_cocoawindow.m
+@@ -1703,6 +1703,56 @@ - (BOOL)processHitTest:(NSEvent *)theEvent
+     return NO; // not a special area, carry on.
+ }
+ 
++static void Cocoa_SyncMouseButtonState(SDL_Mouse *mouse, SDL_MouseID mouseID)
++{
++    const NSUInteger actualButtons = [NSEvent pressedMouseButtons];
++    Uint32 actualButtonState = 0;
++    Uint32 sdlButtonState = 0;
++    
++    // Convert NSEvent button mask to SDL button mask
++    if (actualButtons & (1 << 0)) {
++        actualButtonState |= SDL_BUTTON_LMASK;
++    }
++    if (actualButtons & (1 << 1)) {
++        actualButtonState |= SDL_BUTTON_RMASK;
++    }
++    if (actualButtons & (1 << 2)) {
++        actualButtonState |= SDL_BUTTON_MMASK;
++    }
++    if (actualButtons & (1 << 3)) {
++        actualButtonState |= SDL_BUTTON_X1MASK;
++    }
++    if (actualButtons & (1 << 4)) {
++        actualButtonState |= SDL_BUTTON_X2MASK;
++    }
++    
++    // Get SDL's tracked button state
++    for (int i = 0; i < mouse->num_sources; ++i) {
++        if (mouseID == SDL_GLOBAL_MOUSE_ID || mouseID == SDL_TOUCH_MOUSEID) {
++            if (mouse->sources[i].mouseID != SDL_TOUCH_MOUSEID) {
++                sdlButtonState |= mouse->sources[i].buttonstate;
++            }
++        } else {
++            if (mouseID == mouse->sources[i].mouseID) {
++                sdlButtonState = mouse->sources[i].buttonstate;
++                break;
++            }
++        }
++    }
++    
++    // Sync any buttons that are out of sync
++    for (Uint8 btn = SDL_BUTTON_LEFT; btn <= SDL_BUTTON_X2; ++btn) {
++        Uint32 buttonMask = SDL_BUTTON_MASK(btn);
++        bool sdlPressed = (sdlButtonState & buttonMask) != 0;
++        bool actuallyPressed = (actualButtonState & buttonMask) != 0;
++        
++        if (sdlPressed != actuallyPressed) {
++            // Send synthetic event to sync state
++            SDL_SendMouseButton(0, mouse->focus, mouseID, btn, actuallyPressed);
++        }
++    }
++}
++
+ static void Cocoa_SendMouseButtonClicks(SDL_Mouse *mouse, NSEvent *theEvent, SDL_Window *window, Uint8 button, bool down)
+ {
+     SDL_MouseID mouseID = SDL_DEFAULT_MOUSE_ID;
+@@ -1919,6 +1969,9 @@ - (void)mouseMoved:(NSEvent *)theEvent
+         }
+     }
+ 
++    // Sync button state with hardware before sending motion event
++    Cocoa_SyncMouseButtonState(mouse, mouseID);
++
+     SDL_SendMouseMotion(Cocoa_GetEventTimestamp([theEvent timestamp]), window, mouseID, false, x, y);
+ }
+ 

patches/README.md

@@ -21,6 +21,11 @@ This directory contains custom patches that have been applied to the SDL3 source
    - Comments out the precise scrolling delta scaling code in SDL_cocoamouse.m
    - Prevents over-scaling of trackpad scroll events
 
+7. **0007-sync-mouse-button-state.patch** - Sync mouse button state with hardware
+   - Adds Cocoa_SyncMouseButtonState function that uses NSEvent.pressedMouseButtons to synchronize SDL's tracked button state with macOS hardware state
+   - Ensures event.motion.state accurately reflects actual button presses
+   - Calls sync in mouseMoved: handler before sending motion events to maintain consistency
+
 ## How to Apply Patches
 
 After updating the SDL3 source code, apply these patches in order:
@@ -33,6 +38,7 @@ git apply patches/0003-commit-a56a797.patch
 git apply patches/0004-commit-f20e32b.patch
 git apply patches/0005-add-modulemap.patch
 git apply patches/0006-comment-precise-scrolling.patch
+git apply patches/0007-sync-mouse-button-state.patch
 ```
 
 Or apply them all at once: