From a33a97841544a01f6aca4c87244606b5f65470da Mon Sep 17 00:00:00 2001
From: Martin Fouilleul <martinfouilleul@gmail.com>
Date: Thu, 3 Aug 2023 13:42:47 +0200
Subject: [PATCH] Create app's canvas surface on demand, like the gles one

---
 src/main.c     | 38 ++++++++++++++------------------------
 src/orca_app.h |  2 --
 2 files changed, 14 insertions(+), 26 deletions(-)

diff --git a/src/main.c b/src/main.c
index ab1c904..9e62150 100644
--- a/src/main.c
+++ b/src/main.c
@@ -170,11 +170,6 @@ void orca_log(log_level level,
 	         msg);
 }
 
-mg_surface orca_surface_canvas(void)
-{
-	return(__orcaApp.surface);
-}
-
 typedef struct orca_surface_create_data
 {
 	mp_window window;
@@ -183,13 +178,25 @@ typedef struct orca_surface_create_data
 
 } orca_surface_create_data;
 
-i32 orca_surface_gles_callback(void* user)
+i32 orca_surface_callback(void* user)
 {
 	orca_surface_create_data* data = (orca_surface_create_data*)user;
 	data->surface = mg_surface_create_for_window(data->window, data->api);
 	return(0);
 }
 
+mg_surface orca_surface_canvas(void)
+{
+	orca_surface_create_data data = {
+		.surface = mg_surface_nil(),
+		.window = __orcaApp.window,
+		.api = MG_CANVAS
+	};
+
+	mp_dispatch_on_main_thread_sync(orca_surface_callback, (void*)&data);
+	return(data.surface);
+}
+
 mg_surface orca_surface_gles(void)
 {
 	orca_surface_create_data data = {
@@ -198,7 +205,7 @@ mg_surface orca_surface_gles(void)
 		.api = MG_GLES
 	};
 
-	mp_dispatch_on_main_thread_sync(orca_surface_gles_callback, (void*)&data);
+	mp_dispatch_on_main_thread_sync(orca_surface_callback, (void*)&data);
 	return(data.surface);
 }
 
@@ -478,9 +485,6 @@ i32 orca_runloop(void* user)
 		app->rootDir = cmp.handle;
 	}
 
-	//NOTE: prepare GL surface
-	mg_surface_prepare(app->surface);
-
 	IM3Function* exports = app->runtime.exports;
 
 	//NOTE: call init handler
@@ -759,7 +763,6 @@ i32 orca_runloop(void* user)
 
 		if(exports[G_EXPORT_FRAME_REFRESH])
 		{
-			mg_surface_prepare(app->surface);
 			m3_Call(exports[G_EXPORT_FRAME_REFRESH], 0, 0);
 		}
 
@@ -788,11 +791,6 @@ int main(int argc, char** argv)
 	mp_rect windowRect = {.x = 100, .y = 100, .w = 810, .h = 610};
 	app->window = mp_window_create(windowRect, "orca", 0);
 
-	app->surface = mg_surface_create_for_window(app->window, MG_CANVAS);
-	app->canvas = mg_canvas_create();
-	mg_surface_swap_interval(app->surface, 1);
-
-
 	app->debugOverlay.show = false;
 	app->debugOverlay.surface = mg_surface_create_for_window(app->window, MG_CANVAS);
 	app->debugOverlay.canvas = mg_canvas_create();
@@ -812,11 +810,6 @@ int main(int argc, char** argv)
 
 	for(int i=0; i<3; i++)
 	{
-		mg_surface_prepare(app->surface);
-		mg_canvas_set_current(app->canvas);
-		mg_render(app->surface, app->canvas);
-		mg_surface_present(app->surface);
-
 		mg_surface_prepare(app->debugOverlay.surface);
 		mg_canvas_set_current(app->debugOverlay.canvas);
 		mg_render(app->debugOverlay.surface, app->debugOverlay.canvas);
@@ -840,9 +833,6 @@ int main(int argc, char** argv)
 
 	mp_thread_join(runloopThread, NULL);
 
-	mg_canvas_destroy(app->canvas);
-	mg_surface_destroy(app->surface);
-
 	mg_canvas_destroy(app->debugOverlay.canvas);
 	mg_surface_destroy(app->debugOverlay.surface);
 
diff --git a/src/orca_app.h b/src/orca_app.h
index f6d74b6..edd545a 100644
--- a/src/orca_app.h
+++ b/src/orca_app.h
@@ -112,8 +112,6 @@ typedef struct orca_debug_overlay
 typedef struct orca_app
 {
 	mp_window window;
-	mg_surface surface;
-	mg_canvas canvas;
 
 	file_table fileTable;
 	file_handle rootDir;