Window resize fixes

base/sources/backends/android_system.c

@@ -1070,8 +1070,6 @@ double iron_time() {
 	return (double)(now.tv_sec - start_sec) + (now.tv_usec / 1000000.0);
 }
 
-void gpu_internal_resize(int width, int height);
-
 bool iron_internal_handle_messages(void) {
 	iron_mutex_lock(&unicode_mutex);
 	for (int i = 0; i < unicode_stack_index; ++i) {
@@ -1114,7 +1112,7 @@ bool iron_internal_handle_messages(void) {
 		activityJustResized = false;
 		int32_t width = iron_android_width();
 		int32_t height = iron_android_height();
-		gpu_internal_resize(width, height);
+		gpu_resize(width, height);
 		iron_internal_call_resize_callback(width, height);
 	}
 

base/sources/backends/direct3d12_gpu.c

@@ -469,7 +469,7 @@ void gpu_present() {
 	command_list->lpVtbl->Reset(command_list, command_allocator, NULL);
 }
 
-void gpu_internal_resize(int width, int height) {
+void gpu_resize_internal(int width, int height) {
 	if (fence_value == 0 || width == 0 || height == 0) {
 		return;
 	}

base/sources/backends/ios_system.m

@@ -112,9 +112,7 @@ void iron_internal_call_resize_callback(int width, int height);
 	backingWidth = self.frame.size.width * self.contentScaleFactor;
 	backingHeight = self.frame.size.height * self.contentScaleFactor;
 
-	CAMetalLayer *metalLayer = (CAMetalLayer *)self.layer;
-	metalLayer.drawableSize = CGSizeMake(backingWidth, backingHeight);
-
+	gpu_resize();
 	iron_internal_call_resize_callback(backingWidth, backingHeight);
 }
 

base/sources/backends/linux_system.c

@@ -473,7 +473,6 @@ static char *clipboardString = NULL;
 
 char buffer[1024];
 
-void gpu_internal_resize(int width, int height);
 static void init_pen_device(XDeviceInfo *info, struct x11_pen_device *pen, bool eraser);
 
 static void load_lib(void **lib, const char *name) {
@@ -1198,7 +1197,7 @@ static bool _handle_messages() {
 			if (event.xconfigure.width != k_window->width || event.xconfigure.height != k_window->height) {
 				k_window->width = event.xconfigure.width;
 				k_window->height = event.xconfigure.height;
-				gpu_internal_resize(event.xconfigure.width, event.xconfigure.height);
+				gpu_resize(event.xconfigure.width, event.xconfigure.height);
 				iron_internal_call_resize_callback(event.xconfigure.width, event.xconfigure.height);
 			}
 			break;

base/sources/backends/macos_system.m

@@ -1308,13 +1308,23 @@ int main(int argc, char **argv) {
 	iron_stop();
 }
 
+void iron_internal_call_resize_callback(int width, int height) {
+	if (windows[0].resizeCallback != NULL) {
+		windows[0].resizeCallback(width, height, windows[0].resizeCallbackData);
+	}
+}
+
 - (void)windowDidResize:(NSNotification *)notification {
 	NSWindow *window = [notification object];
 	NSSize size = [[window contentView] frame].size;
 	[view resize:size];
-	if (windows[0].resizeCallback != NULL) {
-		windows[0].resizeCallback(size.width, size.height, windows[0].resizeCallbackData);
-	}
+
+	float scale = [window backingScaleFactor];
+	int w = size.width * scale;
+	int h = size.height * scale;
+
+	gpu_resize(w, h);
+	iron_internal_call_resize_callback(w, h);
 }
 
 - (void)windowWillMiniaturize:(NSNotification *)notification {

base/sources/backends/metal_gpu.m

@@ -24,6 +24,8 @@ static id<MTLSamplerState> linear_sampler;
 static bool has_depth = false;
 static int argument_buffer_step;
 static gpu_buffer_t *current_index_buffer;
+static int resize_w = 0;
+static int resize_h = 0;
 
 static MTLBlendFactor convert_blending_factor(gpu_blending_factor_t factor) {
 	switch (factor) {
@@ -143,7 +145,6 @@ static int format_byte_size(gpu_texture_format_t format) {
 }
 
 void gpu_render_target_init2(gpu_texture_t *target, int width, int height, gpu_texture_format_t format, int framebuffer_index) {
-	id<MTLDevice> device = getMetalDevice();
 	memset(target, 0, sizeof(gpu_texture_t));
 	target->width = width;
 	target->height = height;
@@ -171,7 +172,15 @@ void gpu_render_target_init2(gpu_texture_t *target, int width, int height, gpu_t
 void gpu_destroy(void) {
 }
 
-void gpu_internal_resize(int width, int height) {
+void gpu_resize_internal(int width, int height) {
+	if (width == 0 || height == 0) {
+		return;
+	}
+	if (width == framebuffers[0].width && height == framebuffers[0].height) {
+		return;
+	}
+	resize_w = width;
+	resize_h = height;
 }
 
 static void next_drawable() {
@@ -317,6 +326,16 @@ void gpu_present() {
 	command_buffer = nil;
 	command_encoder = nil;
 
+	if (resize_w > 0) {
+		CAMetalLayer *layer = getMetalLayer();
+		layer.drawableSize = CGSizeMake(resize_w, resize_h);
+		for (int i = 0; i < GPU_FRAMEBUFFER_COUNT; ++i) {
+			// gpu_texture_destroy(&framebuffers[i]);
+			gpu_render_target_init2(&framebuffers[i], resize_w, resize_h, GPU_TEXTURE_FORMAT_RGBA32, i);
+		}
+		resize_w = 0;
+	}
+
 	next_drawable();
 }
 

base/sources/backends/vulkan_gpu.c

@@ -399,7 +399,7 @@ void create_descriptor_layout(void) {
 	vkCreateDescriptorPool(device, &pool_info, NULL, &descriptor_pool);
 }
 
-void gpu_internal_resize(int width, int height) {
+void gpu_resize_internal(int width, int height) {
 	// vkDeviceWaitIdle(device);
 	// create_swapchain();
 }

base/sources/backends/windows_system.c

@@ -408,7 +408,6 @@ void iron_mouse_get_position(int *x, int *y) {
 
 __declspec(dllexport) unsigned long NvOptimusEnablement = 0x00000001;
 __declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
-void gpu_internal_resize(int width, int height);
 
 typedef BOOL(WINAPI *GetPointerInfoType)(UINT32 pointerId, POINTER_INFO *pointerInfo);
 static GetPointerInfoType MyGetPointerInfo = NULL;
@@ -653,7 +652,7 @@ LRESULT WINAPI IronWindowsMessageProcedure(HWND hWnd, UINT msg, WPARAM wParam, L
 	case WM_SIZE: {
 		int width = LOWORD(lParam);
 		int height = HIWORD(lParam);
-		gpu_internal_resize(width, height);
+		gpu_resize(width, height);
 		iron_internal_call_resize_callback(width, height);
 		break;
 	}

base/sources/iron_gpu.c

@@ -74,6 +74,10 @@ void gpu_end() {
 	gpu_end_internal();
 }
 
+void gpu_resize(int width, int height) {
+	gpu_resize_internal(width, height);
+}
+
 void gpu_set_int(int location, int value) {
 	int *ints = (int *)(&constant_buffer.data[location]);
 	ints[0] = value;

base/sources/iron_gpu.h

@@ -154,6 +154,8 @@ void gpu_init(int depth_buffer_bits, bool vsync);
 void gpu_init_internal(int depth_buffer_bits, bool vsync);
 void gpu_destroy(void);
 void gpu_draw(void);
+void gpu_resize(int width, int height);
+void gpu_resize_internal(int width, int height);
 void gpu_set_int(int location, int value);
 void gpu_set_int2(int location, int value1, int value2);
 void gpu_set_int3(int location, int value1, int value2, int value3);