Improved handling of window size changes

Author: britzl

README.md

@@ -95,9 +95,6 @@ The Orthographic API provides a helper module to easily update the camera and se
 	end
 
 	function update(self)
-		render_helper.update()
-		...
-
 		render_helper.set_world_view_projection()
 		-- draw world
 		...

orthographic/camera.lua

@@ -144,15 +144,17 @@ function M.set_window_scaling_factor(scaling_factor)
 	end
 end
 
---- Set the window size
--- Call this from your render script to update the current window size
--- The width and height can later be retrieved through the M.get_window_size()
--- function. This is a convenience for use by custom projector functions
+--- Update the window size
 -- @param width Current window width
 -- @param height Current window height
-function M.set_window_size(width, height)
-	assert(width, "You must provide window width")
-	assert(height, "You must provide window height")
+local function update_window_size()
+	local width, height = window.get_size()
+	if width == 0 or height == 0 then
+		return
+	end
+	if width == WINDOW_WIDTH and height == WINDOW_HEIGHT then
+		return
+	end
 	WINDOW_WIDTH = width
 	WINDOW_HEIGHT = height
 
@@ -269,6 +271,8 @@ function M.update(camera_id, dt)
 		return
 	end
 
+	update_window_size()
+	
 	local camera_world_pos = go.get_world_position(camera_id)
 	local camera_world_to_local_diff = camera_world_pos - go.get_position(camera_id)
 	local follow_enabled = go.get(camera.url, "follow")

orthographic/render/helper.lua

@@ -15,25 +15,11 @@ local world_view = vmath.matrix4()
 local world_projection = vmath.matrix4()
 local screen_view = vmath.matrix4()
 local camera_offset = nil
-local window_width = nil
-local window_height = nil
 
 
 function M.init()
 end
 
-
-function M.update()
-	local current_window_width = render.get_window_width()
-	local current_window_height = render.get_window_height()
-	if window_width ~= current_window_width or window_height ~= current_window_height then
-		window_width = current_window_width
-		window_height = current_window_height
-		camera.set_window_size(current_window_width, current_window_height)
-	end
-end
-
-
 function M.world_projection()
 	return world_projection
 end

orthographic/render/orthographic.render_script

@@ -19,9 +19,6 @@ function init(self)
 end
 
 function update(self)
-	render_helper.update()
-
-
 	-- clear color
 	render.set_depth_mask(true)
 	render.clear({[render.BUFFER_COLOR_BIT] = self.clear_color, [render.BUFFER_DEPTH_BIT] = 1, [render.BUFFER_STENCIL_BIT] = 0})