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1020 | with
openGL.Viewport,
openGL.Program,
openGL.Camera,
openGL.Palette,
openGL.Model.billboard.textured,
openGL.Geometry. lit_textured_skinned,
openGL.Geometry.lit_colored_textured_skinned,
openGL.Font.texture,
openGL.Server,
openGL.Tasks,
openGL.IO,
openGL.Errors,
GL.Binding,
GL.lean,
Interfaces.C,
gnat.heap_Sort,
System,
ada.Text_IO,
ada.Exceptions,
ada.Task_Identification,
ada.unchecked_Deallocation;
package body openGL.Renderer.lean
is
use GL,
Program,
Interfaces.C,
ada.Text_IO;
---------
--- Forge
--
procedure define (Self : access Item)
is
begin
Self.safe_Camera_updates_Map.define;
end define;
procedure destroy (Self : in out Item)
is
use Texture;
begin
Self.stop_Engine;
while not Self.Engine'Terminated
loop
delay Duration'Small;
end loop;
Self.safe_Camera_updates_Map.destruct;
declare
procedure free is new ada.unchecked_Deallocation (visual_geometry_Couples,
visual_geometry_Couples_view);
begin
free (Self.all_opaque_Couples);
free (Self.all_lucid_Couples);
end;
vacuum (Self.texture_Pool);
destroy (Self.texture_Pool);
end destroy;
procedure free (Self : in out View)
is
procedure deallocate is new ada.unchecked_Deallocation (Item'Class, View);
begin
Self.destroy;
deallocate (Self);
end free;
--------------
--- Attributes
--
procedure Context_is (Self : in out Item; Now : in Context.view)
is
begin
Self.Context := Now;
end Context_is;
procedure Context_Setter_is (Self : in out Item; Now : in context_Setter)
is
begin
Self.context_Setter := Now;
end Context_Setter_is;
procedure Swapper_is (Self : in out Item; Now : in Swapper)
is
begin
Self.Swapper := Now;
end Swapper_is;
procedure queue_Impostor_updates (Self : in out Item; the_Updates : in impostor_Updates;
the_Camera : access Camera.item'Class)
is
begin
Self.safe_Camera_updates_Map.add (the_Updates,
Camera_view (the_Camera));
end queue_Impostor_updates;
procedure queue_Visuals (Self : in out Item; the_Visuals : in Visual.views;
the_Camera : access Camera.item'Class)
is
begin
Self.safe_Camera_updates_Map.add (the_Visuals,
Camera_view (the_Camera));
end queue_Visuals;
procedure update_Impostors_and_draw_Visuals (Self : in out Item; all_Updates : in camera_updates_Couples)
is
begin
for i in all_Updates'Range
loop
declare
the_Camera : constant Camera_view := all_Updates (i).Camera;
the_Updates : constant updates_for_Camera_view := all_Updates (i).Updates;
begin
Viewport.Extent_is ((the_Camera.Viewport.Max (1),
the_Camera.Viewport.Max (2)));
Self.update_Impostors (the_Updates.impostor_Updates (1 .. the_Updates.impostor_updates_Last),
camera_world_Transform => the_Camera.World_Transform,
view_Transform => the_Camera.view_Transform,
perspective_Transform => the_Camera.projection_Transform);
the_Updates.impostor_updates_Last := 0;
end;
end loop;
Self.swap_Required := False;
for i in all_Updates'Range
loop
declare
the_Camera : constant Camera_view := all_Updates (i).Camera;
the_Updates : constant updates_for_Camera_view := all_Updates (i).Updates;
clear_Frame : constant Boolean := i = all_Updates'First;
begin
Viewport.Extent_is ((the_Camera.Viewport.Max (1),
the_Camera.Viewport.Max (2)));
Self.draw (the_Visuals => the_Updates.Visuals (1 .. the_Updates.visuals_Last),
camera_world_Transform => the_Camera.World_Transform,
view_Transform => the_Camera.view_Transform,
perspective_Transform => the_Camera.projection_Transform,
clear_Frame => clear_Frame,
to_Surface => null);
the_Updates.visuals_Last := 0;
Self.swap_Required := True;
end;
end loop;
end update_Impostors_and_draw_Visuals;
procedure free_old_Models (Self : in out Item)
is
use Model;
free_Models : graphics_Models;
Last : Natural;
begin
Self.obsolete_Models.fetch (free_Models, Last);
for i in 1 .. Last
loop
free (free_Models (i));
end loop;
end free_old_Models;
procedure free_old_Impostors (Self : in out Item)
is
use Impostor;
free_Impostors : Impostor_Set;
Last : Natural;
begin
Self.obsolete_Impostors.fetch (free_Impostors, Last);
for i in 1 .. Last
loop
free (free_Impostors (i));
end loop;
end free_old_Impostors;
---------
-- Engine
--
task body Engine
is
the_Context : Context.view with unreferenced;
Done : Boolean := False;
begin
select
accept start (Context : openGL.Context.view)
do
the_Context := Context; -- TODO: This is not used.
end start;
openGL.Tasks.Renderer_Task := ada.Task_Identification.current_Task;
Self.context_Setter.all;
put_Line ("openGL Server version: " & Server.Version);
or
accept Stop
do
Done := True;
end Stop;
end select;
openGL.Geometry. lit_textured_skinned.define_Program;
openGL.Geometry.lit_colored_textured_skinned.define_Program;
while not Done
loop
declare
all_Updates : camera_updates_Couples (1 .. 100); -- Caters for 100 cameras.
Length : Natural;
new_font_Name : asset_Name := null_Asset;
new_font_Size : Integer;
new_snapshot_Name : asset_Name := null_Asset;
snapshot_has_Alpha : Boolean;
begin
select
accept render
do
Self.is_Busy := True;
Self.safe_Camera_updates_Map.fetch_all_Updates (all_Updates, Length);
end render;
or accept add_Font (font_Id : in Font.font_Id)
do
new_font_Name := font_Id.Name;
new_font_Size := font_Id.Size;
end add_Font;
or accept Screenshot (Filename : in String;
with_Alpha : in Boolean := False)
do
new_snapshot_Name := to_Asset (Filename);
snapshot_has_Alpha := with_Alpha;
end Screenshot;
or accept Stop
do
Done := True;
end Stop;
end select;
exit when Done;
if new_font_Name /= null_Asset
then
Self.Fonts.insert ((new_font_Name,
new_font_Size),
Font.texture.new_Font_texture (to_String (new_font_Name)).all'Access);
elsif new_snapshot_Name /= null_Asset
then
IO.Screenshot (Filename => to_String (new_snapshot_Name),
with_Alpha => snapshot_has_Alpha);
else
Self.update_Impostors_and_draw_Visuals (all_Updates (1 .. Length));
Self.free_old_Models;
Self.free_old_Impostors;
Self.is_Busy := False;
if Self.Swapper /= null
and Self.swap_Required
then
Self.Swapper.all;
end if;
end if;
end;
end loop;
Self.free_old_Models;
Self.free_old_Impostors;
-- Free any fonts.
--
while not Self.Fonts.is_Empty
loop
declare
use Font,
Font.font_id_Maps_of_font;
the_Cursor : Cursor := Self.Fonts.First;
the_Font : Font.view := Element (the_Cursor);
begin
free (the_Font);
Self.Fonts.delete (the_Cursor);
end;
end loop;
exception
when E : others =>
new_Line;
put_Line ("Unhandled exception in openGL Renderer engine !");
put_Line (ada.Exceptions.Exception_Information (E));
end Engine;
--------------
--- Operations
--
procedure start_Engine (Self : in out Item)
is
begin
Self.Engine.start (null);
end start_Engine;
procedure stop_Engine (Self : in out Item)
is
begin
Self.Engine.stop;
end stop_Engine;
procedure render (Self : in out Item; to_Surface : in Surface.view := null)
is
pragma unreferenced (to_Surface);
begin
Self.Engine.render;
end render;
procedure add_Font (Self : in out Item; font_Id : in Font.font_Id)
is
begin
Self.Engine.add_Font (font_Id);
end add_Font;
procedure Screenshot (Self : in out Item; Filename : in String;
with_Alpha : in Boolean := False)
is
begin
Self.Engine.Screenshot (Filename, with_Alpha);
end Screenshot;
function is_Busy (Self : in Item) return Boolean
is
begin
return Self.is_Busy;
end is_Busy;
procedure update_Impostors (Self : in out Item; the_Updates : in impostor_Updates;
camera_world_Transform : in Matrix_4x4;
view_Transform : in Matrix_4x4;
perspective_Transform : in Matrix_4x4)
is
use linear_Algebra_3D;
light_Site : constant Vector_3 := (10_000.0, -10_000.0, 10_000.0);
the_Light : openGL.Light.item;
begin
Tasks.check;
the_Light. Site_is (light_Site);
the_Light.Color_is (Palette.White);
for i in the_Updates'Range
loop
declare
use Texture,
Visual,
GL.Binding;
the_Update : impostor_Update renames the_Updates (i);
the_Impostor : Impostor.view renames the_Update.Impostor;
texture_Width : constant gl.glSizei := power_of_2_Ceiling (Natural (the_Update.current_Width_pixels ));
texture_Height : constant gl.glSizei := power_of_2_Ceiling (Natural (the_Update.current_Height_pixels));
the_Model : constant openGL.Model.billboard.textured.view
:= openGL.Model.billboard.textured.view (the_Impostor.Visual.Model);
begin
the_Impostor.Visual.Scale_is (the_Impostor.Target.Scale);
the_Impostor.Visual.is_Terrain (the_Impostor.Target.is_Terrain);
the_Impostor.Visual.face_Count_is (the_Impostor.Target.face_Count);
the_Impostor.Visual.apparent_Size_is (the_Impostor.Target.apparent_Size);
-- Render the target after clearing openGL buffers.
--
glClearColor (0.0, 0.0, 0.0, 0.0);
glClear ( GL_COLOR_BUFFER_BIT
or GL_DEPTH_BUFFER_BIT);
declare
new_view_Transform : Matrix_4x4 := camera_world_Transform;
begin
set_Rotation (new_view_Transform, the_Update.current_Camera_look_at_Rotation);
new_view_Transform := inverse_Transform (new_view_Transform);
-- Render the target for subsequent copy to impostor texture.
--
Self.draw (the_Visuals => (1 => the_Impostor.Target),
camera_world_Transform => camera_world_Transform,
view_Transform => new_view_Transform,
perspective_Transform => perspective_Transform,
clear_Frame => False,
to_Surface => null);
end;
-- Get a new sized texture, if needed.
--
if Natural (the_Update.current_Width_pixels) /= the_Model.Texture.Size.Width
or else Natural (the_Update.current_Height_pixels) /= the_Model.Texture.Size.Height
then
free (Self.texture_Pool, the_Model.Texture);
the_Model.Texture_is (new_Texture (From => Self.texture_Pool'Access,
Size => (Natural (texture_Width),
Natural (texture_Height))));
end if;
-- Set texture coordinates.
--
declare
X_first : constant Real := the_Impostor.expand_X;
Y_first : constant Real := the_Impostor.expand_Y;
X_last : constant Real := Real (the_Update.current_Width_pixels) / Real (texture_Width) - X_First;
Y_last : constant Real := Real (the_Update.current_Height_pixels) / Real (texture_Height) - Y_First;
begin
the_Model.Texture_Coords_are ((1 => (S => X_first, T => Y_first),
2 => (S => X_last, T => Y_first),
3 => (S => X_last, T => Y_last),
4 => (S => X_first, T => Y_last)));
end;
the_Model.Texture.enable;
GL.lean.glCopyTexSubImage2D (gl.GL_TEXTURE_2D, 0,
the_Update.current_copy_x_Offset, the_Update.current_copy_y_Offset,
the_Update.current_copy_X, the_Update.current_copy_Y,
the_Update.current_copy_Width, the_Update.current_copy_Height);
Errors.log;
end;
end loop;
Errors.log;
end update_Impostors;
procedure draw (Self : in out Item; the_Visuals : in Visual.views;
camera_world_Transform : in Matrix_4x4;
view_Transform : in Matrix_4x4;
perspective_Transform : in Matrix_4x4;
clear_Frame : in Boolean;
to_Surface : in Surface.view := null)
is
pragma unreferenced (to_Surface);
use linear_Algebra_3D;
opaque_Count : math.Index := 0;
lucid_Count : math.Index := 0;
view_and_perspective_Transform : constant Matrix_4x4 := view_Transform * perspective_Transform;
function get_on_Lights return openGL.Light.items
is
all_Lights : constant openGL.Light.items := Self.Lights.fetch;
lit_Lights : openGL.Light.items (all_Lights'Range);
Count : Natural := 0;
begin
for i in all_Lights'Range
loop
if all_Lights (i).is_On
then
Count := Count + 1;
lit_Lights (Count) := all_Lights (i);
end if;
end loop;
return lit_Lights (1 .. Count);
end get_on_Lights;
Lights : constant openGL.Light.items := get_on_Lights;
begin
Tasks.check;
if clear_Frame then
Self.clear_Frame;
end if;
---------------------
--- Draw the visuals.
--
-- Collect opaque geometry (for state sorting) and collect lucid geometry (for depth sorting).
--
for Each in the_Visuals'Range
loop
declare
use type Model.view,
Model.access_Geometry_views;
the_Visual : Visual.view renames the_Visuals (Each);
begin
if the_Visual.Model.needs_Rebuild
or ( the_Visual.Model.opaque_Geometries = null
and the_Visual.Model. lucid_Geometries = null)
then
the_Visual.Model.create_GL_Geometries (Self.Textures'Access, Self.Fonts);
elsif the_Visual.Model.is_Modified
then
the_Visual.Model.modify;
end if;
declare
opaque_Geometries : Model.access_Geometry_views renames the_Visual.Model.opaque_Geometries;
lucid_Geometries : Model.access_Geometry_views renames the_Visual.Model. lucid_Geometries;
begin
the_Visual.mvp_Transform_is (the_Visual.Transform * view_and_perspective_Transform);
if opaque_Geometries /= null
then
for i in opaque_Geometries'Range
loop
opaque_Count := opaque_Count + 1;
Self.all_opaque_Couples (opaque_Count) := (visual => the_Visual,
Geometry => opaque_Geometries (i));
end loop;
end if;
if lucid_Geometries /= null
then
for i in lucid_Geometries'Range
loop
lucid_Count := lucid_Count + 1;
Self.all_lucid_Couples (lucid_Count) := (visual => the_Visual,
Geometry => lucid_Geometries (i));
end loop;
end if;
end;
end;
end loop;
Errors.log;
-- State sort opaque geometries and render them.
--
declare
use GL.Binding;
procedure Heap_swap (Left, Right : in Natural)
is
Pad : constant visual_geometry_Couple := Self.all_opaque_Couples (Left);
begin
Self.all_opaque_Couples (Left) := Self.all_opaque_Couples (Right);
Self.all_opaque_Couples (Right) := Pad;
end Heap_swap;
function Heap_less_than (Left, Right : in Natural) return Boolean
is
use System;
L_Geometry : openGL.Geometry.view renames Self.all_opaque_Couples (Left) .Geometry;
R_Geometry : openGL.Geometry.view renames Self.all_opaque_Couples (Right).Geometry;
begin
if L_Geometry.Program.gl_Program = R_Geometry.Program.gl_Program
then
return L_Geometry.all'Address < R_Geometry.all'Address;
end if;
return L_Geometry.Program.gl_Program < R_Geometry.Program.gl_Program;
end Heap_less_than;
the_Couple : visual_geometry_Couple;
current_Program : openGL.Program.view;
begin
if opaque_Count > 1
then
gnat.heap_Sort.sort (opaque_Count,
Heap_swap 'unrestricted_Access,
Heap_less_than'unrestricted_Access);
end if;
glDisable (GL_BLEND);
glEnable (GL_DEPTH_TEST);
glDepthMask (gl_TRUE); -- Make depth buffer read/write.
for Each in 1 .. opaque_Count
loop
the_Couple := Self.all_opaque_Couples (Each);
if the_Couple.Geometry.Program /= current_Program
then
current_Program := the_Couple.Geometry.Program;
end if;
current_Program.enable; -- TODO: Only need to do this when program changes ?
current_Program.mvp_Transform_is (the_Couple.Visual.mvp_Transform);
current_Program.model_Matrix_is (the_Couple.Visual.Transform);
current_Program.camera_Site_is (get_Translation (camera_world_Transform));
current_Program.Lights_are (Lights);
current_Program.Scale_is (the_Couple.Visual.Scale);
if the_Couple.Visual.program_Parameters /= null then
the_Couple.Visual.program_Parameters.enable;
end if;
the_Couple.Geometry.render;
end loop;
end;
Errors.log;
-- Depth sort lucid geometries and render them.
--
declare
use GL.Binding;
procedure Heap_swap (Left, Right : in Natural)
is
Pad : constant visual_geometry_Couple := Self.all_lucid_Couples (Left);
begin
Self.all_lucid_Couples (Left) := Self.all_lucid_Couples (Right);
Self.all_lucid_Couples (Right) := Pad;
end Heap_swap;
function Heap_less_than (Left, Right : in Natural) return Boolean
is
begin
return Self.all_lucid_Couples (Left) .Visual.Transform (4, 3) -- Depth_in_camera_space -- NB: In camera space, negative Z is
< Self.all_lucid_Couples (Right).Visual.Transform (4, 3); -- forward, so use '<'.
end Heap_less_than;
the_Couple : visual_geometry_Couple;
current_Program : openGL.Program.view;
begin
if lucid_Count > 1
then
gnat.heap_Sort.sort (lucid_Count,
Heap_swap 'unrestricted_Access,
Heap_less_than'unrestricted_Access);
end if;
glDepthMask (gl_False); -- Make depth buffer read-only, for correct transparency.
glEnable (GL_BLEND);
gl.lean.glBlendEquation (gl.lean.GL_FUNC_ADD);
glBlendFunc (GL_SRC_ALPHA,
GL_ONE_MINUS_SRC_ALPHA);
for Each in 1 .. lucid_Count
loop
the_Couple := Self.all_lucid_Couples (Each);
current_Program := the_Couple.Geometry.Program; -- TODO: Only do this when program changes (as is done above with opaques) ?
current_Program.enable;
current_Program.mvp_Transform_is (the_Couple.Visual.mvp_Transform);
current_Program.camera_Site_is (get_Translation (camera_world_Transform));
current_Program.model_Matrix_is (the_Couple.Visual.Transform);
current_Program.Lights_are (Lights);
current_Program.Scale_is (the_Couple.Visual.Scale);
if the_Couple.Visual.program_Parameters /= null then
the_Couple.Visual.program_Parameters.enable;
end if;
the_Couple.Geometry.render;
end loop;
glDepthMask (gl_True);
end;
Errors.log;
end draw;
-----------------------------
-- safe_camera_Map_of_updates
--
protected
body safe_camera_Map_of_updates
is
procedure define
is
begin
current_Map := Map_1'Unchecked_Access;
end define;
procedure destruct
is
use camera_Maps_of_updates;
procedure deallocate is new ada.unchecked_Deallocation (updates_for_Camera,
updates_for_Camera_view);
the_Updates : updates_for_Camera_view;
Cursor : camera_Maps_of_updates.Cursor := Map_1.First;
begin
while has_Element (Cursor)
loop
the_Updates := Element (Cursor);
deallocate (the_Updates);
next (Cursor);
end loop;
Cursor := Map_2.First;
while has_Element (Cursor)
loop
the_Updates := Element (Cursor);
deallocate (the_Updates);
next (Cursor);
end loop;
current_Map := null;
end destruct;
procedure add (the_Updates : in impostor_Updates;
the_Camera : in Camera_view)
is
the_camera_Updates : updates_for_Camera_view;
our_Camera : constant Camera_view := the_Camera;
begin
begin
the_camera_Updates := current_Map.Element (our_Camera);
exception
when constraint_Error => -- No element exists for this camera yet.
the_camera_Updates := new updates_for_Camera;
current_Map.insert (our_Camera, the_camera_Updates);
end;
declare
First : constant Integer := the_camera_Updates.impostor_updates_Last + 1;
Last : constant Integer := the_camera_Updates.impostor_updates_Last + the_Updates'Length;
begin
the_camera_Updates.Impostor_updates (First .. Last) := the_Updates;
the_camera_Updates.impostor_updates_Last := Last;
end;
end add;
procedure add (the_Visuals : in Visual.views;
the_Camera : in Camera_view)
is
the_camera_Updates : updates_for_Camera_view;
our_Camera : constant Camera_view := the_Camera;
begin
begin
the_camera_Updates := current_Map.Element (our_Camera);
exception
when constraint_Error => -- No element exists for this camera yet.
the_camera_Updates := new updates_for_Camera;
current_Map.Insert (our_Camera, the_camera_Updates);
end;
declare
First : constant Integer := the_camera_Updates.visuals_Last + 1;
Last : constant Integer := the_camera_Updates.visuals_Last + the_Visuals'Length;
begin
the_camera_Updates.Visuals (First .. Last) := the_Visuals;
the_camera_Updates.visuals_Last := Last;
end;
end add;
procedure fetch_all_Updates (the_Updates : out camera_updates_Couples;
Length : out Natural)
is
use camera_Maps_of_updates;
the_Couples : camera_updates_Couples (1 .. Integer (current_Map.Length));
Cursor : camera_Maps_of_updates.Cursor := current_Map.First;
begin
for i in the_Couples'Range
loop
the_Couples (i).Camera := Key (Cursor);
the_Couples (i).Updates := Element (Cursor);
next (Cursor);
end loop;
if current_Map = Map_1'unrestricted_Access
then current_Map := Map_2'unchecked_Access;
else current_Map := Map_1'unchecked_Access;
end if;
the_Updates (1 .. the_Couples'Length) := the_Couples;
Length := the_Couples'Length;
end fetch_all_Updates;
end safe_camera_Map_of_updates;
--------------
-- safe_Models
--
protected
body safe_Models
is
procedure add (the_Model : in Model.view)
is
begin
my_Count := my_Count + 1;
my_Models (my_Count) := the_Model;
end add;
procedure fetch (the_Models : out graphics_Models;
Count : out Natural)
is
begin
the_Models (1 .. my_Count) := my_Models (1 .. my_Count);
Count := my_Count;
my_Count := 0;
end fetch;
end safe_Models;
procedure free (Self : in out Item; the_Model : in Model.view)
is
begin
Self.obsolete_Models.add (the_Model);
end free;
-----------------
-- safe_Impostors
--
protected
body safe_Impostors
is
procedure add (the_Impostor : in Impostor.view)
is
begin
the_Count := the_Count + 1;
the_Impostors (the_Count) := the_Impostor;
end add;
procedure fetch (Impostors : out Impostor_Set;
Count : out Natural)
is
begin
Impostors (1 .. the_Count) := the_Impostors (1 .. the_Count);
Count := the_Count;
the_Count := 0;
end fetch;
end safe_Impostors;
procedure free (Self : in out Item; the_Impostor : in Impostor.view)
is
begin
Self.obsolete_Impostors.add (the_Impostor);
end free;
---------
-- Lights
--
function Hash (Id : in openGL.Light.Id_t) return ada.Containers.Hash_type
is
begin
return ada.Containers.Hash_type (Id);
end Hash;
protected
body safe_Lights
is
procedure add (Light : in openGL.Light.item)
is
begin
the_Lights.insert (Light.Id,
Light);
end add;
procedure set (Light : in openGL.Light.item)
is
begin
the_Lights.replace (Light.Id,
Light);
end set;
procedure rid (Light : in openGL.Light.item)
is
begin
the_Lights.delete (Light.Id);
end rid;
function get (Id : in openGL.Light.Id_t) return openGL.Light.item
is
begin
return the_Lights.Element (Id);
end get;
function fetch return openGL.Light.items
is
all_Lights : openGL.Light.items (1 .. Natural (the_Lights.Length));
i : Natural := 0;
begin
for Each of the_Lights
loop
i := i + 1;
all_Lights (i) := Each;
end loop;
return all_Lights;
end fetch;
end safe_Lights;
function new_Light (Self : in out Item) return openGL.Light.item
is
the_Light : openGL.Light.item;
begin
Self.prior_Light_Id := Self.prior_Light_Id + 1;
the_Light.Id_is (Self.prior_Light_Id);
Self.Lights.add (the_Light);
return the_Light;
end new_Light;
procedure set (Self : in out Item; the_Light : in openGL.Light.item)
is
begin
Self.Lights.set (the_Light);
end set;
procedure rid (Self : in out Item; the_Light : in openGL.Light.item)
is
begin
Self.Lights.rid (the_Light);
end rid;
function Light (Self : in out Item; Id : in openGL.light.Id_t) return openGL.Light.item
is
begin
return Self.Lights.get (Id);
end Light;
function fetch (Self : in out Item) return openGL.Light.items
is
begin
return Self.Lights.fetch;
end fetch;
end openGL.Renderer.lean;
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