update_ex working on iOS

src/ios/WindowData_IOS.h

@@ -4,10 +4,13 @@
 #include <WindowData.h>
 #include <MetalKit/MetalKit.h>
 
+@class iOSViewDelegate;
+
 typedef struct Vertex {
     float x, y, z, w;
 } Vertex;
 
 typedef struct {
+    iOSViewDelegate     *view_delegate;
     Vertex              vertices[4];
 } SWindowData_IOS;

src/ios/iOSMiniFB.m

@@ -150,6 +150,17 @@ mfb_update_ex(struct mfb_window *window, void *buffer, unsigned width, unsigned
         return STATE_INVALID_BUFFER;
     }
 
+    SWindowData_IOS *window_data_ios = (SWindowData_IOS *) window_data->specific;
+
+    if(window_data->buffer_width != width || window_data->buffer_height != height) {
+        window_data->buffer_width  = width;
+        window_data->buffer_stride = width * 4;
+        window_data->buffer_height = height;
+        window_data->draw_buffer   = realloc(window_data->draw_buffer, window_data->buffer_stride * window_data->buffer_height);
+
+        [window_data_ios->view_delegate resizeTextures];
+    }
+
     memcpy(window_data->draw_buffer, buffer, window_data->buffer_width * window_data->buffer_height * 4);
 
     return STATE_OK;

src/ios/iOSViewController.m

@@ -17,7 +17,7 @@
 @implementation iOSViewController
 {
     iOSView         *metal_view;
-    iOSViewDelegate *view_delegate;
+    //iOSViewDelegate *view_delegate;
 }
 
 //-------------------------------------
@@ -60,10 +60,11 @@
         return;
     }
 
-    view_delegate = [[iOSViewDelegate alloc] initWithMetalKitView:metal_view windowData:window_data];
-    [view_delegate mtkView:metal_view drawableSizeWillChange:metal_view.bounds.size];
+    SWindowData_IOS *window_data_ios = (SWindowData_IOS *) window_data->specific;
+    window_data_ios->view_delegate = [[iOSViewDelegate alloc] initWithMetalKitView:metal_view windowData:window_data];
+    [window_data_ios->view_delegate mtkView:metal_view drawableSizeWillChange:metal_view.bounds.size];
 
-    metal_view.delegate = view_delegate;
+    metal_view.delegate = window_data_ios->view_delegate;
 }
 
 @end

src/ios/iOSViewDelegate.h

@@ -17,6 +17,7 @@
 }
 
 -(nonnull instancetype) initWithMetalKitView:(nonnull MTKView *) view windowData:(nonnull SWindowData *) windowData;
+- (void) resizeTextures;
 
 @end
 

src/ios/iOSViewDelegate.m

@@ -167,6 +167,19 @@ NSString *g_shader_src = kShader(
     texture_buffer = [metal_device newTextureWithDescriptor:td];
 }
 
+//-------------------------------------
+- (void) resizeTextures {
+    MTLTextureDescriptor    *td;
+    td = [MTLTextureDescriptor texture2DDescriptorWithPixelFormat:MTLPixelFormatBGRA8Unorm
+                                                            width:window_data->buffer_width
+                                                           height:window_data->buffer_height
+                                                        mipmapped:false];
+
+    // Create the texture from the device by using the descriptor
+    [texture_buffer release];
+    texture_buffer = [metal_device newTextureWithDescriptor:td];
+}
+
 //-------------------------------------
 - (void) drawInMTKView:(nonnull MTKView *) view {
     // Wait to ensure only MaxBuffersInFlight number of frames are getting proccessed

tests/ios/AppDelegate.m

@@ -74,7 +74,7 @@ resize(struct mfb_window *window, int width, int height) {
         }
     }
     
-    mfb_update_state state = mfb_update(g_window, g_buffer);
+    mfb_update_state state = mfb_update_ex(g_window, g_buffer, g_width, g_height);
     if (state != STATE_OK) {
         free(g_buffer);
         g_buffer = 0x0;