Make sure to properly handle High DPI displays when calculating the p…

…rojection

Fixes #7

example/example.collection

@@ -150,6 +150,60 @@ embedded_instances {
   "    w: 1.0\n"
   "  }\n"
   "}\n"
+  "embedded_components {\n"
+  "  id: \"position\"\n"
+  "  type: \"label\"\n"
+  "  data: \"size {\\n"
+  "  x: 128.0\\n"
+  "  y: 32.0\\n"
+  "  z: 0.0\\n"
+  "  w: 0.0\\n"
+  "}\\n"
+  "scale {\\n"
+  "  x: 1.0\\n"
+  "  y: 1.0\\n"
+  "  z: 1.0\\n"
+  "  w: 0.0\\n"
+  "}\\n"
+  "color {\\n"
+  "  x: 1.0\\n"
+  "  y: 1.0\\n"
+  "  z: 1.0\\n"
+  "  w: 1.0\\n"
+  "}\\n"
+  "outline {\\n"
+  "  x: 0.0\\n"
+  "  y: 0.0\\n"
+  "  z: 0.0\\n"
+  "  w: 1.0\\n"
+  "}\\n"
+  "shadow {\\n"
+  "  x: 0.0\\n"
+  "  y: 0.0\\n"
+  "  z: 0.0\\n"
+  "  w: 1.0\\n"
+  "}\\n"
+  "leading: 1.0\\n"
+  "tracking: 0.0\\n"
+  "pivot: PIVOT_CENTER\\n"
+  "blend_mode: BLEND_MODE_ALPHA\\n"
+  "line_break: false\\n"
+  "text: \\\"\\\"\\n"
+  "font: \\\"/example/assets/fonts/silkscreen.font\\\"\\n"
+  "material: \\\"/builtins/fonts/label.material\\\"\\n"
+  "\"\n"
+  "  position {\n"
+  "    x: 0.0\n"
+  "    y: -34.0\n"
+  "    z: 0.0\n"
+  "  }\n"
+  "  rotation {\n"
+  "    x: 0.0\n"
+  "    y: 0.0\n"
+  "    z: 0.0\n"
+  "    w: 1.0\n"
+  "  }\n"
+  "}\n"
   ""
   position {
     x: 0.0

example/player.script

@@ -11,7 +11,9 @@ end
 function update(self, dt)
 	-- update crosshair based on mouse and camera position
 	local cursor_pos = camera.screen_to_world(go.get_id("camera"), self.crosshair)
-	go.set_position(vmath.lerp(0.5, go.get_position("crosshair"), cursor_pos), "crosshair")
+	cursor_pos = vmath.lerp(0.5, go.get_position("crosshair"), cursor_pos)
+	go.set_position(cursor_pos, "crosshair")
+	label.set_text("crosshair#position", ("%.2f x %.2f"):format(cursor_pos.x, cursor_pos.y))
 
 	-- rotate towards cursor
 	local player_world = go.get_world_position()

game.project

@@ -1,7 +1,7 @@
 [project]
 title = Orthographic
 version = 0.9
-dependencies =
+dependencies = 
 
 [bootstrap]
 main_collection = /example/example.collectionc
@@ -13,6 +13,7 @@ game_binding = /input/game.input_bindingc
 [display]
 width = 1280
 height = 720
+high_dpi = 1
 
 [physics]
 scale = 0.02
@@ -27,3 +28,7 @@ include_dirs = orthographic
 
 [graphics]
 max_debug_vertices = 50000
+
+[label]
+subpixels = 0
+

orthographic/render/orthographic.render_script

@@ -6,6 +6,8 @@ if sys.get_config("script.shared_state") ~= "1" then
 	error("ERROR - camera - 'shared_state' setting in game.project must be enabled for camera to work.")
 end
 
+local high_dpi = sys.get_config("display.high_dpi", "0") == "1"
+
 local CLEAR_COLOR = hash("clear_color")
 local SET_VIEW_PROJECTION = hash("set_view_projection")
 local SET_CAMERA_OFFSET = hash("set_camera_offset")
@@ -31,15 +33,25 @@ function init(self)
 	self.world_projection = vmath.matrix4()
 
 	self.screen_view = vmath.matrix4()
-end
 
+	self.window_width = nil
+	self.window_height = nil
+end
 
 function update(self)
 	local window_width = render.get_window_width()
 	local window_height = render.get_window_height()
-
-	-- update window width/height for camera (used by the projections)
-	camera.set_window_size(window_width, window_height)
+	if self.window_width ~= window_width or self.window_height ~= window_height then
+		self.window_width = window_width
+		self.window_height = window_height
+
+		-- update window width/height for camera (used by the projections)
+		if high_dpi then
+			camera.set_window_size(window_width / 2, window_height /2)
+		else
+			camera.set_window_size(window_width, window_height)
+		end
+	end
 
 
 	-- clear color