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332 | -- part of OpenGLAda, (c) 2017 Felix Krause
-- released under the terms of the MIT license, see the file "COPYING"
with Ada.Containers.Indefinite_Ordered_Maps;
with Ada.Unchecked_Conversion;
with System;
with GL.API;
with GL.Enums;
package body GL.Objects.Buffers is
use type Low_Level.Enums.Buffer_Kind;
package Buffer_Maps is new Ada.Containers.Indefinite_Ordered_Maps
(Key_Type => Low_Level.Enums.Buffer_Kind,
Element_Type => Buffer'Class);
use type Buffer_Maps.Cursor;
Current_Buffers : Buffer_Maps.Map;
package Transform_Buffer_Maps is new Ada.Containers.Indefinite_Ordered_Maps
(Key_Type => Low_Level.Enums.Buffer_Kind,
Element_Type => Transform_Buffer'Class);
use type Transform_Buffer_Maps.Cursor;
Current_Transform_Buffers : Transform_Buffer_Maps.Map;
procedure Bind (Target : Buffer_Target; Object : Buffer'Class) is
Cursor : constant Buffer_Maps.Cursor
:= Current_Buffers.Find (Target.Kind);
begin
if Cursor = Buffer_Maps.No_Element or else
Buffer_Maps.Element (Cursor).Reference.GL_Id /= Object.Reference.GL_Id
then
API.Bind_Buffer (Target.Kind, Object.Reference.GL_Id);
Raise_Exception_On_OpenGL_Error;
if Cursor = Buffer_Maps.No_Element then
Current_Buffers.Insert (Target.Kind, Object);
else
Current_Buffers.Replace_Element (Cursor, Object);
end if;
end if;
end Bind;
procedure Bind_Transform_Feedback (Object : Transform_Buffer'Class) is
Target_Kind : constant GL.Low_Level.Enums.Buffer_Kind :=
GL.Low_Level.Enums.Transform_Feedback;
Cursor : constant Transform_Buffer_Maps.Cursor
:= Current_Transform_Buffers.Find (Target_Kind);
begin
if Cursor = Transform_Buffer_Maps.No_Element or else
Transform_Buffer_Maps.Element (Cursor).Reference.GL_Id /= Object.Reference.GL_Id
then
API.Bind_Transform_Feedback (Target_Kind, Object.Reference.GL_Id);
Raise_Exception_On_OpenGL_Error;
if Cursor = Transform_Buffer_Maps.No_Element then
Current_Transform_Buffers.Insert (Target_Kind, Object);
else
Current_Transform_Buffers.Replace_Element (Cursor, Object);
end if;
end if;
end Bind_Transform_Feedback;
procedure Bind_Buffer_Base (Target : Buffer_Target; Index : UInt;
Object : Buffer'Class) is
Cursor : constant Buffer_Maps.Cursor
:= Current_Buffers.Find (Target.Kind);
begin
if Cursor = Buffer_Maps.No_Element or else
Buffer_Maps.Element (Cursor).Reference.GL_Id /= Object.Reference.GL_Id
then
API.Bind_Buffer_Base (Target.Kind, Index, Object.Reference.GL_Id);
Raise_Exception_On_OpenGL_Error;
if Cursor = Buffer_Maps.No_Element then
Current_Buffers.Insert (Target.Kind, Object);
else
Current_Buffers.Replace_Element (Cursor, Object);
end if;
end if;
end Bind_Buffer_Base;
function Current_Object (Target : Buffer_Target) return Buffer'Class is
Cursor : constant Buffer_Maps.Cursor
:= Current_Buffers.Find (Target.Kind);
begin
if Cursor /= Buffer_Maps.No_Element then
return Buffer_Maps.Element (Cursor);
else
raise No_Object_Bound_Exception with Target.Kind'Img;
end if;
end Current_Object;
procedure Load_To_Buffer (Target : Buffer_Target'Class;
Data : Pointers.Element_Array;
Usage : Buffer_Usage) is
use type C.long;
begin
API.Buffer_Data (Target.Kind,
Pointers.Element'Size * Data'Length / System.Storage_Unit,
Data (Data'First)'Address, Usage);
Raise_Exception_On_OpenGL_Error;
end Load_To_Buffer;
procedure Allocate (Target : Buffer_Target; Number_Of_Bytes : Long;
Usage : Buffer_Usage) is
begin
API.Buffer_Data (Target.Kind, Low_Level.SizeIPtr (Number_Of_Bytes),
System.Null_Address, Usage);
Raise_Exception_On_OpenGL_Error;
end Allocate;
procedure Allocate (Target : Texture_Buffer_Target;
Format : GL.Pixels.Internal_Format;
Object : Buffer'Class) is
begin
API.Texture_Buffer_Data (Target.Kind, Format, Object.Reference.GL_Id);
Raise_Exception_On_OpenGL_Error;
end Allocate;
procedure Draw_Elements (Mode : Connection_Mode; Count : Types.Size;
Index_Type : Unsigned_Numeric_Type;
Element_Offset : Natural := 0) is
Element_Bytes : Natural;
begin
case Index_Type is
when UByte_Type => Element_Bytes := 1;
when UShort_Type => Element_Bytes := 2;
when UInt_Type => Element_Bytes := 4;
end case;
API.Draw_Elements (Mode, Count, Index_Type,
Low_Level.IntPtr (Element_Bytes * Element_Offset));
Raise_Exception_On_OpenGL_Error;
end Draw_Elements;
procedure Draw_Elements_Instanced (Mode : Connection_Mode;
Count : UInt;
Index_Type : Unsigned_Numeric_Type;
Element_Offset : UInt := 0;
Instance_Count : UInt := 0) is
Element_Bytes : constant array (Unsigned_Numeric_Type) of UInt :=
(UByte_Type => 1, UShort_Type => 2, UInt_Type => 4);
begin
API.Draw_Elements_Instanced (Mode, Int (Count), Index_Type,
Low_Level.IntPtr (Element_Bytes (Index_Type) * Element_Offset),
Int (Instance_Count));
Raise_Exception_On_OpenGL_Error;
end Draw_Elements_Instanced;
procedure Draw_Elements_Base_Vertex (Mode : Connection_Mode;
Count : UInt;
Index_Type : Unsigned_Numeric_Type;
Element_Offset : UInt;
Base_Vertex : Int) is
Element_Bytes : UInt;
begin
case Index_Type is
when UByte_Type => Element_Bytes := 1;
when UShort_Type => Element_Bytes := 2;
when UInt_Type => Element_Bytes := 4;
end case;
API.Draw_Elements_Base_Vertex (Mode, Count, Index_Type,
UInt (Low_Level.IntPtr (Element_Bytes * Element_Offset)), Base_Vertex);
Raise_Exception_On_OpenGL_Error;
end Draw_Elements_Base_Vertex;
procedure Draw_Transform_Feedback (Mode : Connection_Mode;
Object : Transform_Buffer) is
begin
API.Draw_Transform_Feedback (Mode, Object.Reference.GL_Id);
Raise_Exception_On_OpenGL_Error;
end Draw_Transform_Feedback;
procedure Draw_Transform_Feedback_Stream (Mode : Connection_Mode;
Object : Transform_Buffer;
Stream : UInt) is
begin
API.Draw_Transform_Feedback_Stream (Mode, Object.Reference.GL_Id, Stream);
Raise_Exception_On_OpenGL_Error;
end Draw_Transform_Feedback_Stream;
procedure Map (Target : Buffer_Target'Class; Access_Type : Access_Kind;
Pointer : out Pointers.Pointer) is
function To_Pointer is new Ada.Unchecked_Conversion
(System.Address, Pointers.Pointer);
begin
Pointer := To_Pointer (API.Map_Buffer (Target.Kind, Access_Type));
Raise_Exception_On_OpenGL_Error;
end Map;
procedure Map_Range (Target : Buffer_Target'Class;
Access_Type : Map_Bits;
Offset : Int;
Size : Types.Size;
Pointer : out Pointers.Pointer) is
function To_Pointer is new Ada.Unchecked_Conversion
(System.Address, Pointers.Pointer);
function To_BitField is new Ada.Unchecked_Conversion
(Map_Bits, GL.Low_Level.Bitfield);
begin
Pointer := To_Pointer
(API.Map_Buffer_Range (Target.Kind, Low_Level.IntPtr (Offset),
Low_Level.SizeIPtr (Size), To_BitField (Access_Type)));
Raise_Exception_On_OpenGL_Error;
end Map_Range;
procedure Unmap (Target : Buffer_Target) is
begin
API.Unmap_Buffer (Target.Kind);
Raise_Exception_On_OpenGL_Error;
end Unmap;
procedure Flush_Mapped_Buffer_Range (Target : Buffer_Target'Class;
Offset : Int; Size : Types.Size) is
begin
API.Flush_Mapped_Buffer_Range (Target.Kind, Low_Level.IntPtr (Offset),
Low_Level.SizeIPtr (Size));
Raise_Exception_On_OpenGL_Error;
end Flush_Mapped_Buffer_Range;
function Pointer (Target : Buffer_Target'Class) return Pointers.Pointer is
function To_Pointer is new Ada.Unchecked_Conversion
(System.Address, Pointers.Pointer);
Ret : System.Address := System.Null_Address;
begin
API.Buffer_Pointer (Target.Kind, Enums.Buffer_Map_Pointer, Ret);
Raise_Exception_On_OpenGL_Error;
return To_Pointer (Ret);
end Pointer;
procedure Set_Sub_Data (Target : Buffer_Target'Class;
Offset : Types.Size;
Data : Pointers.Element_Array) is
use type C.long;
begin
API.Buffer_Sub_Data (Target.Kind, Low_Level.IntPtr (Offset),
Pointers.Element'Size * Data'Length / System.Storage_Unit,
Data (Data'First)'Address);
Raise_Exception_On_OpenGL_Error;
end Set_Sub_Data;
procedure Get_Sub_Data (Target : Buffer_Target'Class;
Offset : Types.Int;
Data : out Types.Single_Array) is
begin
Data := (others => <>);
API.Get_Buffer_Sub_Data (Target.Kind, Low_Level.IntPtr (Offset),
Low_Level.SizeIPtr (Data'Size / 8), Data'Address);
Raise_Exception_On_OpenGL_Error;
end Get_Sub_Data;
function Access_Type (Target : Buffer_Target) return Access_Kind is
Ret : Access_Kind := Access_Kind'First;
begin
API.Get_Buffer_Parameter_Access_Kind (Target.Kind, Enums.Buffer_Access,
Ret);
Raise_Exception_On_OpenGL_Error;
return Ret;
end Access_Type;
function Mapped (Target : Buffer_Target) return Boolean is
Ret : Low_Level.Bool := Low_Level.Bool (False);
begin
API.Get_Buffer_Parameter_Bool (Target.Kind, Enums.Buffer_Mapped, Ret);
Raise_Exception_On_OpenGL_Error;
return Boolean (Ret);
end Mapped;
function Size (Target : Buffer_Target) return Types.Size is
Ret : Types.Size := 0;
begin
API.Get_Buffer_Parameter_Size (Target.Kind, Enums.Buffer_Size, Ret);
Raise_Exception_On_OpenGL_Error;
return Ret;
end Size;
function Usage (Target : Buffer_Target) return Buffer_Usage is
Ret : Buffer_Usage := Buffer_Usage'First;
begin
API.Get_Buffer_Parameter_Usage (Target.Kind, Enums.Buffer_Usage, Ret);
Raise_Exception_On_OpenGL_Error;
return Ret;
end Usage;
overriding
procedure Internal_Create_Id (Object : Buffer; Id : out UInt) is
pragma Unreferenced (Object);
begin
API.Gen_Buffers (1, Id);
Raise_Exception_On_OpenGL_Error;
end Internal_Create_Id;
overriding
procedure Internal_Create_Id (Object : Transform_Buffer; Id : out UInt) is
pragma Unreferenced (Object);
begin
API.Gen_Transform_Feedbacks (1, Id);
Raise_Exception_On_OpenGL_Error;
end Internal_Create_Id;
overriding
procedure Internal_Release_Id (Object : Buffer; Id : UInt) is
pragma Unreferenced (Object);
begin
API.Delete_Buffers (1, (1 => Id));
Raise_Exception_On_OpenGL_Error;
end Internal_Release_Id;
overriding
procedure Internal_Release_Id (Object : Transform_Buffer; Id : UInt) is
pragma Unreferenced (Object);
begin
API.Delete_Transform_Feedbacks (1, (1 => Id));
Raise_Exception_On_OpenGL_Error;
end Internal_Release_Id;
procedure Invalidate_Data (Object : in out Buffer) is
begin
API.Invalidate_Buffer_Data (Object.Reference.GL_Id);
Raise_Exception_On_OpenGL_Error;
end Invalidate_Data;
procedure Invalidate_Sub_Data (Object : in out Buffer;
Offset, Length : Long_Size) is
begin
API.Invalidate_Buffer_Sub_Data (Object.Reference.GL_Id,
Low_Level.IntPtr (Offset),
Low_Level.SizeIPtr (Length));
Raise_Exception_On_OpenGL_Error;
end Invalidate_Sub_Data;
end GL.Objects.Buffers;
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