REVIEWED: Window messages WM_SIZING, WM_SIZE, WM_WINDOWPOSCHANGED #5720

* fix drm with rlsw

* fix window resizing with sdl

* fix window resizing with win32

CHANGELOG

@@ -4,7 +4,7 @@ changelog
 Current Release:    raylib 5.5 (18 November 2024)
 
 -------------------------------------------------------------------------
-Release:     raylib 6.0 (?? March 2026)
+Release:     raylib 6.0 (23 April 2026)
 -------------------------------------------------------------------------
 KEY CHANGES:
  - New Software Renderer backend [rlsw]
@@ -285,6 +285,7 @@ Detailed changes:
 [rtext] REVIEWED: `TextToFloat()`, remove removed inaccurate comment (#4596) by @hexmaster111
 [rtext] REDESIGNED: `LoadFontData()`, added input parameter by @raysan5 -WARNING-
 [rmodels] ADDED: Support CPU animation in OpenGL 1.1 (#4925) by @JeffM2501
+[rmodels] REMOVED: `DrawModelPoints()` and `DrawModelPointsEx()`, moved to an example (#5697) by @maiconpintoabreu -WARNING-
 [rmodels] RENAMED: Skinning shader variables (new default naming) by @raysan5
 [rmodels] REVIEWED: glTF animation framerate calculation (#4472, #5445) by @TheLazyIndianTechie
 [rmodels] REVIEWED: Assign meshes without bone weights to the bone they are attached to so they animate by @Jeffm2501
@@ -311,6 +312,7 @@ Detailed changes:
 [rmodels] REVIEWED: `LoadModelAnimationsGLTF()`, properly load 1 frame animations (#5561) by @arlez80
 [rmodels] REVIEWED: `LoadModelAnimationsGLTF()`, anim correctly inherits world transform (#5206) by @ArmanOmmid
 [rmodels] REVIEWED: `UploadMesh()`, improve default normal and tangent values (#4763) by @Bigfoot71
+[rmodels] REVIEWED: `UplaodMesh()`, fix for devices without VAO support (#5692) by @psxdev
 [rmodels] REVIEWED: `GenMeshTangents()`, improvements (#4937) by @Bigfoot71
 [rmodels] REVIEWED: `UpdateModelAnimation()` optimization (#5244) by @Arrangemonk
 [rmodels] REVIEWED: `UpdateModelAnimationBones()`, break on first mesh found and formating by @raysan5
@@ -322,6 +324,7 @@ Detailed changes:
 [rmodels] REVIEWED: `DrawMeshInstanced()`, breaking if instanceTransform was unused (#5469) by @al13n321
 [rmodels] REVIEWED: `DrawSphereEx()`, normals support (#4926) by @karl-zylinski
 [rmodels] REVIEWED: `ExportMesh()`, improve OBJ vertex data precision and lower memory usage (#4496) by @mikeemm
+[rmodels] REVIEWED: `CheckCollisionSpheres()`, simplified using `Vector3DistanceSqr()` (#5695) by @Bigfoot71
 [raudio] REVIEWED: Fix a glitch at the end of a sound (#5578) by @mackron
 [raudio] REVIEWED: Improvements to device configuration (#5577) by @mackron
 [raudio] REVIEWED: Initialize sound alias properties as if it was a new sound (#5123) by @JeffM2501

src/external/rlsw.h

@@ -2357,7 +2357,8 @@ static inline bool sw_texture_alloc(sw_texture_t *texture, const void *data, int
 
     sw_pixel_read_color8_f readColor8 = NULL;
     sw_pixel_read_color_f readColor = NULL;
-    if (!isDepth) {
+    if (!isDepth)
+    {
         readColor8 = sw_pixel_get_read_color8_func(format);
         readColor = sw_pixel_get_read_color_func(format);
     }
@@ -2803,7 +2804,8 @@ static const sw_blend_f SW_BLEND_TABLE[SW_BLEND_FACTOR_COUNT][SW_BLEND_FACTOR_CO
 // Maps a GL blend factor enum to its compact table index
 static inline int sw_blend_factor_index(SWfactor f)
 {
-    switch (f) {
+    switch (f)
+    {
         case SW_ZERO:                return 0;
         case SW_ONE:                 return 1;
         case SW_SRC_COLOR:           return 2;
@@ -2821,7 +2823,8 @@ static inline int sw_blend_factor_index(SWfactor f)
 
 static bool sw_blend_factor_needs_alpha(SWfactor f)
 {
-    switch (f) {
+    switch (f)
+    {
         case SW_SRC_ALPHA:
         case SW_ONE_MINUS_SRC_ALPHA:
         case SW_DST_ALPHA:
@@ -2829,6 +2832,7 @@ static bool sw_blend_factor_needs_alpha(SWfactor f)
         case SW_SRC_ALPHA_SATURATE: return true;
         default: break;
     }
+
     return false;
 }
 

src/platforms/rcore_desktop_sdl.c

@@ -1528,6 +1528,10 @@ void PollInputEvents(void)
                             if ((width + borderLeft + borderRight != usableBounds.w) && (height + borderTop + borderBottom != usableBounds.h)) FLAG_CLEAR(CORE.Window.flags, FLAG_WINDOW_MAXIMIZED);
                         }
                         #endif
+
+                        #if defined(GRAPHICS_API_OPENGL_SOFTWARE)
+                        swResize(width, height);
+                        #endif
                     } break;
 
                     case SDL_WINDOWEVENT_ENTER: CORE.Input.Mouse.cursorOnScreen = true; break;

src/platforms/rcore_desktop_win32.c

@@ -1063,14 +1063,14 @@ Vector2 GetMonitorPosition(int monitor)
 // Get selected monitor width (currently used by monitor)
 int GetMonitorWidth(int monitor)
 {
-    TRACELOG(LOG_WARNING, "GetMonitorWidth not implemented");
+    //TRACELOG(LOG_WARNING, "GetMonitorWidth not implemented");
     return 0;
 }
 
 // Get selected monitor height (currently used by monitor)
 int GetMonitorHeight(int monitor)
 {
-    TRACELOG(LOG_WARNING, "GetMonitorHeight not implemented");
+    //TRACELOG(LOG_WARNING, "GetMonitorHeight not implemented");
     return 0;
 }
 
@@ -1105,7 +1105,7 @@ const char *GetMonitorName(int monitor)
 // Get window position XY on monitor
 Vector2 GetWindowPosition(void)
 {
-    TRACELOG(LOG_WARNING, "GetWindowPosition not implemented");
+    //TRACELOG(LOG_WARNING, "GetWindowPosition not implemented");
     return (Vector2){ 0, 0 };
 }
 
@@ -1760,13 +1760,31 @@ static LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lpara
             memset(CORE.Input.Keyboard.previousKeyState, 0, sizeof(CORE.Input.Keyboard.previousKeyState));
             memset(CORE.Input.Keyboard.currentKeyState, 0, sizeof(CORE.Input.Keyboard.currentKeyState));
         } break;
-        case WM_SIZING:
+        case WM_SIZING: // Sent to a window that the user is resizing
         {
-            if (!(CORE.Window.flags & FLAG_WINDOW_RESIZABLE))
-                TRACELOG(LOG_WARNING, "WIN32: WINDOW: Trying to resize a non-resizable window");
+            if (CORE.Window.flags & FLAG_WINDOW_RESIZABLE)
+            {
+                //HandleWindowResize(hwnd, &platform.appScreenWidth, &platform.appScreenHeight);
+            }
 
             result = TRUE;
         } break;
+        case WM_SIZE:
+        {
+            // WARNING: Don't trust the docs, they say this message can not be obtained if not calling DefWindowProc()
+            // in response to WM_WINDOWPOSCHANGED but looks like when a window is created,
+            // this message can be obtained without getting WM_WINDOWPOSCHANGED
+            
+#if defined(GRAPHICS_API_OPENGL_SOFTWARE)
+            // WARNING: Waiting two frames before resizing because software-renderer backend is initilized with swInit() later 
+            // than InitPlatform(), that triggers WM_SIZE, so avoid crashing
+            if (CORE.Time.frameCounter > 2) HandleWindowResize(hwnd, &platform.appScreenWidth, &platform.appScreenHeight);
+#else
+            // NOTE: This message is only triggered on window creation
+            HandleWindowResize(hwnd, &platform.appScreenWidth, &platform.appScreenHeight);
+#endif
+            result = 0; // If an application processes WM_SIZE message, it should return zero
+        } break;
         case WM_GETMINMAXINFO:
         {
             DWORD style = MakeWindowStyle(platform.desiredFlags);
@@ -1865,19 +1883,13 @@ static LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lpara
                 default: break;
             }
         } break;
-        case WM_SIZE:
-        {
-            // WARNING: Don't trust the docs, they say this message can not be obtained if not calling DefWindowProc()
-            // in response to WM_WINDOWPOSCHANGED but looks like when a window is created,
-            // this message can be obtained without getting WM_WINDOWPOSCHANGED
-            // WARNING: This call fails for Software-Renderer backend
-            //HandleWindowResize(hwnd, &platform.appScreenWidth, &platform.appScreenHeight);
-        } break;
-        //case WM_MOVE
+        //case WM_MOVE: break;
         case WM_WINDOWPOSCHANGED:
         {
             WINDOWPOS *pos = (WINDOWPOS*)lparam;
             if (!(pos->flags & SWP_NOSIZE)) HandleWindowResize(hwnd, &platform.appScreenWidth, &platform.appScreenHeight);
+
+            DefWindowProc(hwnd, msg, wparam, lparam);
         } break;
         case WM_GETDPISCALEDSIZE:
         {
@@ -2091,6 +2103,10 @@ static void HandleWindowResize(HWND hwnd, int *width, int *height)
 
     CORE.Window.screenScale = MatrixScale( (float)CORE.Window.render.width/CORE.Window.screen.width,
         (float)CORE.Window.render.height/CORE.Window.screen.height, 1.0f);
+
+#if defined(GRAPHICS_API_OPENGL_SOFTWARE)
+    swResize(clientSize.cx, clientSize.cy);
+#endif
 }
 
 // Update window style

src/platforms/rcore_drm.c

@@ -837,14 +837,8 @@ void SwapScreenBuffer(void)
     uint32_t height = mode->vdisplay;
 
     // Dumb buffers use a fixed format based on bpp
-#if SW_COLOR_BUFFER_BITS == 24
     const uint32_t bpp = 32;    // 32 bits per pixel (XRGB8888 format)
     const uint32_t depth = 24;  // Color depth, here only 24 bits, alpha is not used
-#else
-    // REVIEW: Not sure how it will be interpreted (RGB or RGBA?)
-    const uint32_t bpp = SW_COLOR_BUFFER_BITS;
-    const uint32_t depth = SW_COLOR_BUFFER_BITS;
-#endif
 
     // Create a dumb buffer for software rendering
     struct drm_mode_create_dumb creq = { 0 };
@@ -899,7 +893,7 @@ void SwapScreenBuffer(void)
 
     // Copy the software rendered buffer to the dumb buffer with scaling if needed
     // NOTE: RLSW will make a simple copy if the dimensions match
-    swBlitFramebuffer(0, 0, width, height, 0, 0, width, height, SW_RGBA, SW_UNSIGNED_BYTE, dumbBuffer);
+    swBlitPixels(0, 0, width, height, 0, 0, width, height, SW_RGBA, SW_UNSIGNED_BYTE, dumbBuffer);
 
     // Unmap the buffer
     munmap(dumbBuffer, creq.size);