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uopengl_graphikengine.pas
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uopengl_graphikengine.pas
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(******************************************************************************)
(* uOpenGLGraphikEngine.pas ??.??.???? *)
(* *)
(* Version : 0.10 *)
(* *)
(* Author : Uwe Schächterle (Corpsman) *)
(* *)
(* Support : www.Corpsman.de *)
(* *)
(* Description : This unit tries to help the user to use graphiks with OpenGL *)
(* without the need of special knowlege in bitmanipulations. *)
(* *)
(* The unit is in alpha-state there are a lot functions that *)
(* work not correct, please read the implementation part *)
(* carefully before use. *)
(* *)
(* License : See the file license.md, located under: *)
(* https://github.com/PascalCorpsman/Software_Licenses/blob/main/license.md *)
(* for details about the license. *)
(* *)
(* It is not allowed to change or remove this text from any *)
(* source file of the project. *)
(* *)
(* Warranty : There is no warranty, neither in correctness of the *)
(* implementation, nor anything other that could happen *)
(* or go wrong, use at your own risk. *)
(* *)
(* Known Issues: none *)
(* *)
(* History : 0.01 - Initial version ( exported from balanced ) *)
(* 0.02 - Hinzufügen der RenderBillboard Routine *)
(* 0.03 - Ändern RenderQuad zur unterstützung für negative Width*)
(* Damit Bugfix Spiegelungsbug für 180° rotation *)
(* 0.04 - added glcolor() *)
(* 0.05 - neuer Stretch mode Nearest Neighbour interpolation *)
(* 0.06 - Methode RemoveGraphik *)
(* 0.07 - LoadAlphaPNGGraphik *)
(* 0.08 - Fix Memleaks *)
(* 0.09 - Fix LoadAlphaColorGraphik *)
(* 0.10 - Fix speedup graphik loading *)
(* *)
(******************************************************************************)
Unit uopengl_graphikengine;
{$IFDEF FPC}
{$MODE objFPC}{$H+}
{$ENDIF}
Interface
// Je nach dem wie mans Braucht mus hier angepasst werden!!
{.$DEFINE USE_GL}
(*
Ist dieser Schalter an, werden diverse Informationen in die Konsole geschrieben
- Anzeige des Allokierten OpenGLSpeichers
- Anzeige der Anzahl der Allokierten Texturen
*)
{.$DEFINE DEBUGGOUTPUT}
Uses
// Die OpenGL Schnittstelle
{$IFDEF USE_GL}
gl, glu,
{$ELSE}
dglopengl,
{$ENDIF}
// IDE spezifisches
LCLType, // HBitmap type
IntfGraphics, // TLazIntfImage type
fpImage, // TFPColor type
// lazjpg, // ist in "Lazarus/Components/Image" zu finden, dieses Packete mus installiert werden !!
Graphics, // TBitmap
//, // Für PNG Dateien
// dialogs, // Debugg
ugraphics, // TRGB
Classes, // Function Point
math, // SinCos
uvectormath, // Mathe Operationen
sysutils; // Fileexists, ..
Type
TStretchMode = (
smNone, // Kein Stretching, wirft eine Exception bei Größen <> 2^n
smStretch, // Die Textur wird mittels Stretchdraw bilinear hochgesampelt
smStretchHard, // Die Textur wird via Nearest Neighbour gestretcht (besonders wichtig bei Binärer Transparenz)
smClamp // Die ZielTextur wird groß gemacht, und die Quelltextur Oben Links reinkopiert.
);
TFRect = Record
Left, Top, Right, Bottom: Single;
End;
TSubImage = Record
ImageData: Integer; // Pointer auf die Texture
ImageRect: TFrect; // Ausschnitt der Textur der Gerendert werden soll
Width: Integer; // Breite auf dem Monitor
Height: Integer; // Höhe auf dem Monitor
End;
TGraphikItem = Record
Image: Integer;
Name: String;
IsAlphaImage: Boolean; // Wenn True, dann wurde Image mit AlphaKanal geladen und kann geblendet werden
Stretched: TStretchMode;
OrigWidth: integer;
OrigHeight: integer;
StretchedWidth: integer;
StretchedHeight: integer;
End;
{ TOpenGL_GraphikEngine }
TOpenGL_GraphikEngine = Class
private
FImages: Array Of TGraphikItem;
{$IFDEF DEBUGGOUTPUT}
OpenGLBufCount: int64;
{$ENDIF}
public
Constructor create;
Destructor destroy; override;
Function GetInfo(Value: String): TGraphikItem;
Function GetInfo(Value: integer): TGraphikItem;
Function Find(Value: String; ExceptionOnNotExists: Boolean = True): integer; // Gibt die Textur wieder die unter dem Namen gespeichert ist. Pfadangaben nur bei doppeldeutigen namen notwendig.
Function FindItem(Value: String; ExceptionOnNotExists: Boolean = True): TGraphikItem; // Gibt die Textur wieder die unter dem Namen gespeichert ist. Pfadangaben nur bei doppeldeutigen namen notwendig.
Procedure Clear; // Alles Freigeben
(*
Funktionen die Machen was sie sollen
*)
Function LoadGraphik(Filename: String; Stretch: TStretchmode = smNone): Integer; overload; // Laden einer Graphik ohne Alphakanal
Function LoadGraphikItem(Filename: String; Stretch: TStretchmode = smNone): TGraphikItem; overload; // Laden einer Graphik ohne Alphakanal
Function LoadGraphik(Const Graphik: TBitmap; Name: String; Stretch: TStretchmode = smNone): Integer; overload; // Laden einer Graphik ohne Alphakanal
Function LoadAlphaColorGraphik(Filename: String; Color: TRGB; Stretch: TStretchmode = smNone): Integer; overload; // Lädt eine Alphagraphik und setzt den Wert von Color = Transparent.
Function LoadAlphaColorGraphik(Const Graphik: TBitmap; Name: String; Color: TRGB; Stretch: TStretchmode = smNone): Integer; overload; // Lädt eine Alphagraphik und setzt den Wert von Color = Transparent.
(*
Funktionen die NICHT Machen was sie sollen
Sie werden aber trotzdem in einigen Projekten genutzt und Funktionieren dort.
*)
Function LoadAlphaValueGraphik(Filename: String; AlphaValue: byte; Stretch: TStretchmode = smNone): Integer; Deprecated; // Laden einer Graphik, und Vorgeben eines Gesammten Alpha wertes
Function LoadAlphaGraphik(Filename: String; Stretch: TStretchmode = smNone): Integer; overload; // Laden einer Transparenten Graphik, clfuchsia = Transparent
Function LoadAlphaGraphikItem(Filename: String; Stretch: TStretchmode = smNone): TGraphikItem; overload; // Laden einer Transparenten Graphik, clfuchsia = Transparent
Function LoadAlphaGraphik(Const Graphik, AlphaMask: Tbitmap; Name: String; Stretch: TStretchmode = smNone): integer; overload; // Lädt eine Graphik aus TBitmap, und Lädt den Alphakanal aus den Luminanzdaten von Alphamask, Name dient zum späteren Wiederfinden
Function LoadAlphaGraphik(Graphik, AlphaMask: String; Stretch: TStretchmode = smNone): integer; overload; // Lädt eine Graphik aus TBitmap, und Lädt den Alphakanal aus den Luminanzdaten von Alphamask
Function LoadAlphaGraphikItem(Graphik, AlphaMask: String; Stretch: TStretchmode = smNone): TGraphikItem; overload; // Lädt eine Graphik aus TBitmap, und Lädt den Alphakanal aus den Luminanzdaten von Alphamask
Function LoadAlphaPNGGraphik(Graphik: String; Stretch: TStretchmode = smNone): integer; // Lädt eine .png Graphik und nutzt deren Alpha Kanal als Alpha
(*
* Wenn eine Graphik Explicit nicht mehr gecached werden soll, true wenn sie gefunden und gelöscht werden konnte
*)
Function RemoveGraphik(Value: TGraphikItem): Boolean; overload;
Function RemoveGraphik(Value: integer): Boolean; overload;
End;
Const
Fuchsia: TRGB = (r: 255; g: 0; b: 255);
Black: TRGB = (r: 0; g: 0; b: 0);
White: TRGB = (r: 255; g: 255; b: 255);
Var
OpenGL_GraphikEngine: TOpenGL_GraphikEngine;
(*
Rendert in 2D ein Quad
ACHTUNG Bei Bildern mit der KantenLänge 1 Kommt blödsinn = kein Bild raus !!
ACHTUNG Diese Routinen funktionieren nicht immer mit eingeschalteten CullFacing !!
*)
Procedure RenderAlphaQuad(Top, Left: Single; Image: TGraphikItem); overload; // Fertig Getestet // WTF: warum ist hier top und left vertauscht ?
Procedure RenderAlphaQuad(Middle: Tpoint; Width, Height, Angle: Integer; Texture: integer = 0); overload; // Fertig Getestet
Procedure RenderAlphaRQuad(TopLeft, BottomRight: TPoint; Angle: Integer; RotatebyOrigin: Boolean = False; Texture: Integer = 0); overload; // Fertig Getestet
Procedure RenderAlphaRQuad(TopLeft, BottomRight: TVector2; Angle: Integer; RotatebyOrigin: Boolean = False; Texture: Integer = 0); overload; // Fertig Getestet
Procedure RenderAlphaImage(Value: TSubImage);
Procedure RenderQuad(Top, Left: Single; Image: TGraphikItem); overload; // WTF: warum ist hier top und left vertauscht ?
Procedure RenderQuad(Middle: TVector2; Angle: Single; Image: TGraphikItem); overload;
Procedure RenderQuad(Middle: Tpoint; Width, Height, Angle: Integer; Texture: integer = 0); overload; // Fertig Getestet
Procedure RenderQuad(Middle: TVector2; Width, Height, Angle: Single; Texture: integer = 0); overload; // Fertig Getestet
Procedure RenderQuad(TopLeft, BottomRight: TPoint; Angle: Integer; RotatebyOrigin: Boolean = False; Texture: Integer = 0); overload; // Fertig Getestet
Procedure RenderQuad(TopLeft, BottomRight: TVector2; Angle: Integer; RotatebyOrigin: Boolean = False; Texture: Integer = 0); overload; // Fertig Getestet
(*
Rendert einen Kreis, ohne Füllung
*)
Procedure RenderCircle(Middle: TVector2; Steps, Radius: Integer);
(*
Rendert ein Billboard, ACHTUNG bei mehr als einem Bildboard Pro Renderschritt, sollte das "Hohlen" der Modelviewmatrix ausgelagert werden !!
Mittels Dimension kann man die Ausbreitung in x und y Richtung angeben. Position ist stets der Mittelpunkt der textur
*)
Procedure RenderBillboard(Position: TVector3; Dimension: TVector2; Texture: integer = 0);
(*
Erstellt einen Screenshot aus dem Aktuellen Framebuffer,
inclusive Ermittlung der Auflösung.
*)
Function OpenGLScreenshot: TBitmap;
(*
* Setzt die OpenGLFarbe auf den Wert von TColor
* Alpha = 0 = Opak
*)
Procedure glColor(Color: TColor; Alpha: byte = 0);
Function FRect(Top, Left, Bottom, Right: Single): TFRect;
Implementation
{$IFDEF DEBUGGOUTPUT}
Function FileSizetoString(Value: Int64): String;
Var
s: Char;
r: Int64;
Begin
s := ' ';
r := 0;
If value > 1024 Then Begin
s := 'K';
r := value Mod 1024;
value := value Div 1024;
End;
If value > 1024 Then Begin
s := 'M';
r := value Mod 1024;
value := value Div 1024;
End;
If value > 1024 Then Begin
s := 'G';
r := value Mod 1024;
value := value Div 1024;
End;
If value > 1024 Then Begin
s := 'T';
r := value Mod 1024;
value := value Div 1024;
End;
If value > 1024 Then Begin
s := 'P';
r := value Mod 1024;
value := value Div 1024;
End;
If (r Div 100) <> 0 Then
result := inttostr(value) + ',' + inttostr(r Div 100) + s + 'B'
Else
result := inttostr(value) + s + 'B'
End;
{$ENDIF}
(*
* Der Folgende Code bassiert auf dieser Grundlage :
* http://wiki.delphigl.com/index.php/Sphärisches_Billboard
*)
Procedure RenderBillboard(Position: TVector3; Dimension: TVector2;
Texture: integer);
Var
up, right: TVector3;
Matrix: TMatrix4x4;
Begin
If Texture <> 0 Then Begin
glBindTexture(gl_texture_2d, Texture);
End;
(*
* Dieser Code muss theoretisch nur ein mal gerechnet werden ( so lange sich die Augposition nicht ändert )
*)
glGetFloatv(GL_MODELVIEW_MATRIX, @Matrix[0, 0]);
glColor4f(1, 1, 1, 1);
// Auslesen des Right und Up Vektors ( das geht nur wenn man annimmt das die ModelView Matrix Orthogonal ist )
Right := V3(Matrix[0, 0], Matrix[1, 0], Matrix[2, 0]);
Up := V3(Matrix[0, 1], Matrix[1, 1], Matrix[2, 1]);
// Das Billboard auf die gewünschte Größe Skalieren
glbegin(GL_QUADS);
(*
* Mit unterschiedlichen Positionen/ Dimensionen könnten nun mehrere Billboards gerendert werden.
*)
right := ScaleV3(Dimension.x / 2, NormV3(right));
up := ScaleV3(Dimension.y / 2, NormV3(up));
//Der eigentliche Renderschritt
glTexCoord2d(1, 1);
glVertex3f(Position.x + Right.x + Up.x, Position.y + Right.y + Up.y, Position.z + Right.z + Up.z);
glTexCoord2d(0, 1);
glVertex3f(Position.x - Right.x + Up.x, Position.y - Right.y + Up.y, Position.z - Right.z + Up.z);
glTexCoord2d(0, 0);
glVertex3f(Position.x - Right.x - Up.x, Position.y - Right.y - Up.y, Position.z - Right.z - Up.z);
glTexCoord2d(1, 0);
glVertex3f(Position.x + Right.x - Up.x, Position.y + Right.y - Up.y, Position.z + Right.z - Up.z);
glend();
End;
Function OpenGLScreenshot: TBitmap;
Var
dim: Array[0..3] Of Integer;
c: Array Of Array[0..3] Of Byte;
z, i, j: integer;
TempIntfImg: TLazIntfImage;
ImgHandle, ImgMaskHandle: HBitmap;
CurColor: TFPColor;
Begin
// Auslesen der Framebuffer Auflösung
glGetIntegerv(GL_VIEWPORT, @dim[0]);
// Erstellen des Bitmaps
result := TBitmap.create;
result.pixelformat := pf24bit;
result.width := dim[2];
result.height := dim[3];
TempIntfImg := TLazIntfImage.Create(0, 0);
TempIntfImg.LoadFromBitmap(result.Handle, result.MaskHandle);
c := Nil;
setlength(c, dim[2] * dim[3]);
// Auslesen des Framebuffers in einen temporären Speicher
glReadPixels(dim[0], dim[1], dim[2], dim[3], GL_RGBA, GL_UNSIGNED_BYTE, @c[0, 0]);
// Umschreiben des Temporären Speichers in das TBitmap
z := 0;
For j := 0 To result.height - 1 Do
For i := 0 To result.width - 1 Do Begin
CurColor.red := c[z][0] * 256;
CurColor.green := c[z][1] * 256;
CurColor.blue := c[z][2] * 256;
// c[z][3] wäre der Alphakanal, aber den Braucht man ja hier nicht ...
//TempIntfImg.Colors[i, j] := CurColor;
TempIntfImg.Colors[i, result.height - 1 - j] := CurColor;
inc(z);
End;
TempIntfImg.CreateBitmaps(ImgHandle, ImgMaskHandle, false);
result.Handle := ImgHandle;
result.MaskHandle := ImgMaskHandle;
TempIntfImg.free;
End;
Procedure glColor(Color: TColor; Alpha: byte);
Var
r, g, b: Byte;
Begin
r := color And $FF;
g := (color Shr 8) And $FF;
b := (color Shr 16) And $FF;
glColor4ub(r, g, b, Alpha);
End;
Function FRect(Top, Left, Bottom, Right: Single): TFRect;
Begin
result.Top := Top;
result.Left := Left;
result.Bottom := Bottom;
result.Right := Right;
End;
Procedure RenderAlphaImage(Value: TSubImage);
Var
b: {$IFDEF USE_GL}Byte{$ELSE}Boolean{$ENDIF};
Begin
B := glIsEnabled(gl_Blend);
If Not (b{$IFDEF USE_GL} = 1{$ENDIF}) Then
glenable(gl_Blend);
glBlendFunc(GL_ONE_MINUS_SRC_ALPHA, GL_SRC_ALPHA);
glbindtexture(GL_TEXTURE_2d, Value.ImageData);
glbegin(gl_quads);
glTexCoord2f(Value.ImageRect.left, Value.ImageRect.top);
glvertex3f(0, 0, 0);
glTexCoord2f(Value.ImageRect.Right, Value.ImageRect.top);
glvertex3f(value.Width, 0, 0);
glTexCoord2f(Value.ImageRect.right, Value.ImageRect.Bottom);
glvertex3f(value.width, Value.Height, 0);
glTexCoord2f(Value.ImageRect.left, Value.ImageRect.Bottom);
glvertex3f(0, Value.height, 0);
glend;
If Not (b{$IFDEF USE_GL} = 1{$ENDIF}) Then
gldisable(gl_blend);
End;
Function IsPowerOfTwo(Value: Integer): Boolean;
Var
i: Integer;
Begin
i := 1;
While i < Value Do
i := i Shl 1;
result := i = Value;
End;
Function GetNextPowerOfTwo(Value: integer): Integer;
Var
i: Integer;
Begin
i := 1;
While i < Value Do
i := i Shl 1;
result := i;
End;
Procedure RenderCircle(Middle: TVector2; Steps, Radius: Integer);
Var
delta: Double;
s, c: extended;
i: Integer;
Begin
Delta := 2 * Pi / Steps;
glbegin(gl_Line_Loop);
For i := 0 To Steps - 1 Do Begin
sincos(i * Delta, s, c);
glvertex3f(middle.x + c * Radius, middle.y + s * Radius, 0);
End;
glend;
End;
Procedure RenderAlphaQuad(Top, Left: Single; Image: TGraphikItem);
Var
b: {$IFDEF USE_GL}Byte{$ELSE}Boolean{$ENDIF};
Begin
B := glIsEnabled(gl_Blend);
If Not (b{$IFDEF USE_GL} = 1{$ENDIF}) Then
glenable(gl_Blend);
glBlendFunc(GL_ONE_MINUS_SRC_ALPHA, GL_SRC_ALPHA);
RenderQuad(Top, Left, Image);
If Not (b{$IFDEF USE_GL} = 1{$ENDIF}) Then
gldisable(gl_blend);
End;
Procedure RenderAlphaQuad(Middle: Tpoint; Width, Height, Angle: Integer; Texture: integer = 0);
Var
b: {$IFDEF USE_GL}Byte{$ELSE}Boolean{$ENDIF};
Begin
B := glIsEnabled(gl_Blend);
If Not (b{$IFDEF USE_GL} = 1{$ENDIF}) Then
glenable(gl_Blend);
glBlendFunc(GL_ONE_MINUS_SRC_ALPHA, GL_SRC_ALPHA);
RenderQuad(Middle, Width, height, angle, texture);
If Not (b{$IFDEF USE_GL} = 1{$ENDIF}) Then
gldisable(gl_blend);
End;
Procedure RenderAlphaRQuad(TopLeft, BottomRight: TVector2; Angle: Integer; RotatebyOrigin: Boolean = False; Texture: Integer = 0); overload; // Fertig Getestet
Var
b: {$IFDEF USE_GL}Byte{$ELSE}Boolean{$ENDIF};
Begin
B := glIsEnabled(gl_Blend);
If Not (b{$IFDEF USE_GL} = 1{$ENDIF}) Then
glenable(gl_Blend);
glBlendFunc(GL_ONE_MINUS_SRC_ALPHA, GL_SRC_ALPHA);
RenderQuad(Topleft, Bottomright, angle, RotatebyOrigin, texture);
If Not (b{$IFDEF USE_GL} = 1{$ENDIF}) Then
gldisable(gl_blend);
End;
Procedure RenderAlphaRQuad(TopLeft, BottomRight: TPoint; Angle: Integer; RotatebyOrigin: Boolean = False; Texture: Integer = 0);
Var
b: {$IFDEF USE_GL}Byte{$ELSE}Boolean{$ENDIF};
Begin
B := glIsEnabled(gl_Blend);
If Not (b{$IFDEF USE_GL} = 1{$ENDIF}) Then
glenable(gl_Blend);
glBlendFunc(GL_ONE_MINUS_SRC_ALPHA, GL_SRC_ALPHA);
RenderQuad(Topleft, Bottomright, angle, RotatebyOrigin, texture);
If Not (b{$IFDEF USE_GL} = 1{$ENDIF}) Then
gldisable(gl_blend);
End;
Procedure RenderQuad(TopLeft, BottomRight: TVector2; Angle: Integer; RotatebyOrigin: Boolean = False; Texture: Integer = 0); overload; // Fertig Getestet
Var
w2, h2: Single;
Begin
If RotatebyOrigin Then Begin
If Texture <> 0 Then
glBindTexture(gl_texture_2d, Texture);
glpushmatrix;
w2 := (BottomRight.x - TopLeft.x) / 2;
h2 := (BottomRight.y - TopLeft.y) / 2;
If Angle <> 0 Then
glRotatef(angle, 0, 0, 1);
gltranslatef((TopLeft.x + BottomRight.x) / 2, (TopLeft.y + BottomRight.y) / 2, 0);
glbegin(gl_quads);
glTexCoord2f(0, 1);
glvertex3f(-w2, -h2, 0);
glTexCoord2f(1, 1);
glvertex3f(w2, -h2, 0);
glTexCoord2f(1, 0);
glvertex3f(w2, h2, 0);
glTexCoord2f(0, 0);
glvertex3f(-w2, h2, 0);
glend;
glpopmatrix;
End
Else
// RenderQuad(point((TopLeft.x + BottomRight.x) Shr 1, (TopLeft.y + BottomRight.y) Shr 1), BottomRight.x - TopLeft.x, TopLeft.y - BottomRight.y, angle, Texture);
// RenderQuad(Fpoint((TopLeft.x + BottomRight.x) / 2, (TopLeft.y + BottomRight.y) / 2), abs(BottomRight.x - TopLeft.x), abs(TopLeft.y - BottomRight.y), angle, Texture);
RenderQuad(v2((TopLeft.x + BottomRight.x) / 2, (TopLeft.y + BottomRight.y) / 2), abs(BottomRight.x - TopLeft.x), abs(TopLeft.y - BottomRight.y), angle, Texture);
End;
Procedure RenderQuad(TopLeft, BottomRight: TPoint; Angle: Integer; RotatebyOrigin: Boolean = False; Texture: Integer = 0);
Var
w2, h2: integer;
Begin
If RotatebyOrigin Then Begin
If Texture <> 0 Then
glBindTexture(gl_texture_2d, Texture);
glpushmatrix;
w2 := (BottomRight.x - TopLeft.x) Div 2;
h2 := (BottomRight.y - TopLeft.y) Div 2;
If Angle <> 0 Then
glRotatef(angle, 0, 0, 1);
gltranslatef((TopLeft.x + BottomRight.x) Div 2, (TopLeft.y + BottomRight.y) Div 2, 0);
glbegin(gl_quads);
glTexCoord2f(0, 1);
glvertex3f(-w2, -h2, 0);
glTexCoord2f(1, 1);
glvertex3f(w2, -h2, 0);
glTexCoord2f(1, 0);
glvertex3f(w2, h2, 0);
glTexCoord2f(0, 0);
glvertex3f(-w2, h2, 0);
glend;
glpopmatrix;
End
Else
// RenderQuad(point((TopLeft.x + BottomRight.x) Shr 1, (TopLeft.y + BottomRight.y) Shr 1), BottomRight.x - TopLeft.x, TopLeft.y - BottomRight.y, angle, Texture);
RenderQuad(point((TopLeft.x + BottomRight.x) Div 2, (TopLeft.y + BottomRight.y) Div 2), abs(BottomRight.x - TopLeft.x), abs(TopLeft.y - BottomRight.y), angle, Texture);
End;
Procedure RenderQuad(Middle: TVector2; Width, Height, Angle: Single; Texture: integer = 0); overload; // Fertig Getestet
Var
w2, h2: Single;
Begin
If Texture <> 0 Then
glBindTexture(gl_texture_2d, Texture);
glpushmatrix;
gltranslatef(middle.x, middle.y, 0);
w2 := Width / 2;
h2 := height / 2;
If Angle <> 0 Then
glRotatef(angle, 0, 0, 1);
glbegin(gl_quads);
glTexCoord2f(0, 1);
glvertex3f(-w2, h2, 0);
glTexCoord2f(1, 1);
glvertex3f(w2, h2, 0);
glTexCoord2f(1, 0);
glvertex3f(w2, -h2, 0);
glTexCoord2f(0, 0);
glvertex3f(-w2, -h2, 0);
glend;
// Der Code macht Probleme mit glCullface
// glbegin(gl_quads);
// glTexCoord2f(0, 1);
// glvertex3f(-w2, -h2, 0);
// glTexCoord2f(1, 1);
// glvertex3f(w2, -h2, 0);
// glTexCoord2f(1, 0);
// glvertex3f(w2, h2, 0);
// glTexCoord2f(0, 0);
// glvertex3f(-w2, h2, 0);
// glend;
glpopmatrix;
End;
Procedure RenderQuad(Top, Left: Single; Image: TGraphikItem);
Var
tw, th: Single;
Begin
Case Image.Stretched Of
smClamp: Begin
tw := Image.OrigWidth / Image.StretchedWidth;
th := Image.OrigHeight / Image.StretchedHeight;
End;
smNone, smStretch, smStretchHard: Begin
tw := 1;
th := 1;
End;
End;
glBindTexture(gl_texture_2d, image.Image);
glpushmatrix;
gltranslatef(left, top, 0);
glbegin(gl_quads);
glTexCoord2f(0, th);
glvertex3f(0, image.OrigHeight, 0);
glTexCoord2f(tw, th);
glvertex3f(image.OrigWidth, image.OrigHeight, 0);
glTexCoord2f(tw, 0);
glvertex3f(image.OrigWidth, 0, 0);
glTexCoord2f(0, 0);
glvertex3f(0, 0, 0);
glend;
glpopmatrix;
End;
Procedure RenderQuad(Middle: TVector2; Angle: Single; Image: TGraphikItem);
Begin
glPushMatrix;
gltranslatef(middle.x, middle.y, 0);
If Angle <> 0 Then
glRotatef(angle, 0, 0, 1);
glTranslatef(-Image.OrigWidth / 2, -image.OrigHeight / 2, 0);
RenderQuad(0, 0, Image);
glPopMatrix;
End;
Procedure RenderQuad(Middle: Tpoint; Width, Height, Angle: Integer; Texture: integer = 0);
Var
w2, h2: Integer;
Begin
If Texture <> 0 Then
glBindTexture(gl_texture_2d, Texture);
glpushmatrix;
gltranslatef(middle.x, middle.y, 0);
w2 := Width Div 2;
h2 := height Div 2;
If Angle <> 0 Then
glRotatef(angle, 0, 0, 1);
glbegin(gl_quads);
glTexCoord2f(0, 1);
glvertex3f(-w2, -h2, 0);
glTexCoord2f(1, 1);
glvertex3f(w2, -h2, 0);
glTexCoord2f(1, 0);
glvertex3f(w2, h2, 0);
glTexCoord2f(0, 0);
glvertex3f(-w2, h2, 0);
glend;
glpopmatrix;
End;
{ TGraphikEngine }
Constructor TOpenGL_GraphikEngine.create;
Begin
Inherited create;
{$IFDEF DEBUGGOUTPUT}
OpenGLBufCount := 0;
{$ENDIF}
End;
Destructor TOpenGL_GraphikEngine.destroy;
Begin
Clear;
End;
Procedure TOpenGL_GraphikEngine.Clear;
Var
i: Integer;
Begin
For i := 0 To high(Fimages) Do
If Fimages[i].image <> 0 Then
glDeleteTextures(1, @Fimages[i].image);
setlength(Fimages, 0);
{$IFDEF DEBUGGOUTPUT}
OpenGLBufCount := 0;
{$ENDIF}
End;
Function TOpenGL_GraphikEngine.LoadGraphik(Filename: String; Stretch: TStretchmode): Integer;
Begin
result := LoadGraphikItem(Filename, Stretch).Image;
End;
Function TOpenGL_GraphikEngine.LoadGraphikItem(Filename: String; Stretch: TStretchmode): TGraphikItem;
Var
OpenGLData: Array Of Array[0..2] Of Byte;
Data: String;
b, b2: Tbitmap;
IntfImg1: TLazIntfImage;
CurColor: TFPColor;
jp: TJPEGImage;
png: TPortableNetworkGraphic;
c, j, i: Integer;
bool: {$IFDEF USE_GL}Byte{$ELSE}Boolean{$ENDIF};
ow, oh, nw, nh: INteger;
Begin
If FileExists(Filename) Then Begin
Data := LowerCase(Filename);
// Graphik bereits geladen
For i := 0 To high(Fimages) Do Begin
If Fimages[i].Name = Data Then Begin
result := Fimages[i];
{$IFDEF DEBUGGOUTPUT}
writeln('TGraphikEngine.LoadGraphik(' + Filename + ')');
writeln('OpenGL Buffer : ' + FileSizetoString(OpenGLBufCount));
writeln('TextureCount : ' + inttostr(high(Fimages) + 1));
{$ENDIF}
exit;
End;
End;
// Graphik mus geladen werden
b := TBitmap.create;
If lowercase(ExtractFileExt(Filename)) = '.jpg' Then Begin
jp := TJPEGImage.create;
jp.LoadFromFile(Filename);
b.assign(jp);
jp.free;
End
Else If lowercase(ExtractFileExt(Filename)) = '.png' Then Begin
png := TPortableNetworkGraphic.create;
png.LoadFromFile(Filename);
b.assign(png);
png.free;
End
Else Begin
b.LoadFromFile(Filename);
End;
// create the raw image
IntfImg1 := TLazIntfImage.Create(0, 0);
nw := b.width;
nh := b.height;
ow := b.width;
oh := b.height;
{$IFDEF DEBUGGOUTPUT}
writeln('TGraphikEngine.LoadGraphik(' + Filename + ')');
writeln('Orig size : ' + inttostr(b.width) + 'x' + inttostr(b.height));
{$ENDIF}
Case Stretch Of
smNone: Begin
End;
smStretchHard, smStretch: Begin
nw := GetNextPowerOfTwo(b.width);
nh := GetNextPowerOfTwo(b.height);
If (nw <> b.width) Or (nh <> b.height) Then Begin
b2 := TBitmap.create;
b2.PixelFormat := pf24bit;
b2.width := nw;
b2.height := nh;
If Stretch = smStretch Then Begin
Stretchdraw(b2.canvas, rect(0, 0, nw, nh), b, imBilinear);
End
Else Begin
Stretchdraw(b2.canvas, rect(0, 0, nw, nh), b, imNearestNeighbour);
End;
b.free;
b := b2;
End;
End;
smClamp: Begin
nw := GetNextPowerOfTwo(b.width);
nh := GetNextPowerOfTwo(b.height);
If (nw <> b.width) Or (nh <> b.height) Then Begin
b2 := TBitmap.create;
b2.PixelFormat := pf24bit;
b2.width := nw;
b2.height := nh;
b2.canvas.Draw(0, 0, b);
b.free;
b := b2;
End;
End;
End;
// load the raw image from the bitmap handles
IntfImg1.LoadFromBitmap(B.Handle, B.MaskHandle);
{$IFDEF DEBUGGOUTPUT}
writeln('OpenGL size : ' + inttostr(b.width) + 'x' + inttostr(b.height));
OpenGLBufCount := OpenGLBufCount + (b.width * b.height * 3);
writeln('OpenGL Buffer : ' + FileSizetoString(OpenGLBufCount));
{$ENDIF}
If IsPowerOfTwo(b.width) And IsPowerOfTwo(b.Height) Then Begin
// Laden der Graphikdaten
opengldata := Nil;
setlength(opengldata, b.width * b.height);
c := 0;
For j := 0 To b.height - 1 Do Begin
For i := 0 To b.width - 1 Do Begin
CurColor := IntfImg1.Colors[i, j];
OpenGLData[c, 0] := CurColor.Red Div 256;
OpenGLData[c, 1] := CurColor.green Div 256;
OpenGLData[c, 2] := CurColor.blue Div 256;
inc(c);
End;
End;
// Übergeben an OpenGL
bool := glIsEnabled(GL_TEXTURE_2D);
If Not (Bool{$IFDEF USE_GL} = 1{$ENDIF}) Then
glEnable(GL_TEXTURE_2D);
glGenTextures(1, @Result);
glBindTexture(GL_TEXTURE_2D, result.Image);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, gl_RGB, b.width, b.height, 0, GL_RGB, GL_UNSIGNED_BYTE, @OpenGLData[0]);
If Not (Bool{$IFDEF USE_GL} = 1{$ENDIF}) Then
gldisable(GL_TEXTURE_2D);
IntfImg1.free;
b.free;
// Übernehmen in die Engine
setlength(Fimages, high(Fimages) + 2);
Fimages[high(Fimages)].Image := Result.Image;
Fimages[high(Fimages)].Name := data;
Fimages[high(Fimages)].Stretched := stretch;
Fimages[high(Fimages)].OrigWidth := ow;
Fimages[high(Fimages)].OrigHeight := oh;
Fimages[high(Fimages)].StretchedWidth := nw;
Fimages[high(Fimages)].StretchedHeight := nh;
Fimages[high(Fimages)].IsAlphaImage := false;
result := Fimages[high(Fimages)];
{$IFDEF DEBUGGOUTPUT}
writeln('TextureCount : ' + inttostr(high(Fimages) + 1));
{$ENDIF}
End
Else
Raise Exception.create('Error Image ' + extractfilename(Filename) + ' has invalid Width / Height, has to be 2^x.');
End
Else Begin
result.Image := 0;
Raise Exception.create('Error could not find "' + Filename + '".');
End;
End;
Function TOpenGL_GraphikEngine.LoadGraphik(Const Graphik: TBitmap; Name: String; Stretch: TStretchmode): Integer; // Laden einer Graphik ohne Alphakanal
Var
OpenGLData: Array Of Array[0..2] Of Byte;
Data: String;
b, b2: Tbitmap;
IntfImg1: TLazIntfImage;
CurColor: TFPColor;
c, j, i: Integer;
bool: {$IFDEF USE_GL}Byte{$ELSE}Boolean{$ENDIF};
ow, oh, nw, nh: Integer;
Begin
Data := LowerCase(name);
// Graphik bereits geladen
For i := 0 To high(Fimages) Do
If Fimages[i].Name = Data Then Begin
result := Fimages[i].Image;
{$IFDEF DEBUGGOUTPUT}
writeln('TGraphikEngine.LoadGraphik(' + name + ')');
writeln('OpenGL Buffer : ' + FileSizetoString(OpenGLBufCount));
writeln('TextureCount : ' + inttostr(high(Fimages) + 1));
{$ENDIF}
exit;
End;
// Graphik mus geladen werden
b := TBitmap.create;
b.assign(Graphik);
// create the raw image
IntfImg1 := TLazIntfImage.Create(0, 0);
nw := b.width;
nh := b.height;
ow := b.width;
oh := b.height;
{$IFDEF DEBUGGOUTPUT}
writeln('TGraphikEngine.LoadGraphik(' + name + ')');
writeln('Orig size : ' + inttostr(b.width) + 'x' + inttostr(b.height));
{$ENDIF}
Case Stretch Of
smNone: Begin
End;
smStretchHard, smStretch: Begin
nw := GetNextPowerOfTwo(b.width);
nh := GetNextPowerOfTwo(b.height);
If (nw <> b.width) Or (nh <> b.height) Then Begin
b2 := TBitmap.create;
b2.PixelFormat := pf24bit;
b2.width := nw;
b2.height := nh;
// b2.canvas.StretchDraw(rect(0, 0, nw, nh), b);
If Stretch = smStretch Then Begin
Stretchdraw(b2.canvas, rect(0, 0, nw, nh), b, imBilinear);
End
Else Begin
Stretchdraw(b2.canvas, rect(0, 0, nw, nh), b, imNearestNeighbour);
End;
b.free;
b := b2;
End;
End;
smClamp: Begin
nw := GetNextPowerOfTwo(b.width);
nh := GetNextPowerOfTwo(b.height);
If (nw <> b.width) Or (nh <> b.height) Then Begin
b2 := TBitmap.create;
b2.PixelFormat := pf24bit;
b2.width := nw;
b2.height := nh;
b2.canvas.Draw(0, 0, b);
b.free;
b := b2;
End;
End;
End;
// load the raw image from the bitmap handles
IntfImg1.LoadFromBitmap(B.Handle, B.MaskHandle);
{$IFDEF DEBUGGOUTPUT}
writeln('OpenGL size : ' + inttostr(b.width) + 'x' + inttostr(b.height));
OpenGLBufCount := OpenGLBufCount + (b.width * b.height * 3);
writeln('OpenGL Buffer : ' + FileSizetoString(OpenGLBufCount));
{$ENDIF}
If IsPowerOfTwo(b.width) And IsPowerOfTwo(b.Height) Then Begin
// Laden der Graphikdaten
opengldata := Nil;
setlength(opengldata, b.width * b.height);
c := 0;
For j := 0 To b.height - 1 Do Begin
For i := 0 To b.width - 1 Do Begin
CurColor := IntfImg1.Colors[i, j];
OpenGLData[c, 0] := CurColor.Red Div 256;
OpenGLData[c, 1] := CurColor.green Div 256;
OpenGLData[c, 2] := CurColor.blue Div 256;
inc(c);
End;
End;
// Übergeben an OpenGL
glGenTextures(1, @Result);
bool := glIsEnabled(GL_TEXTURE_2D);
If Not (Bool{$IFDEF USE_GL} = 1{$ENDIF}) Then
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, result);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, gl_RGB, b.width, b.height, 0, GL_RGB, GL_UNSIGNED_BYTE, @OpenGLData[0]);
If Not (Bool{$IFDEF USE_GL} = 1{$ENDIF}) Then
gldisable(GL_TEXTURE_2D);
IntfImg1.free;
// Übernehmen in die Engine
setlength(Fimages, high(Fimages) + 2);
Fimages[high(Fimages)].Image := Result;
Fimages[high(Fimages)].Name := data;
Fimages[high(Fimages)].Stretched := stretch;
Fimages[high(Fimages)].OrigWidth := ow;
Fimages[high(Fimages)].OrigHeight := oh;
Fimages[high(Fimages)].StretchedWidth := nw;
Fimages[high(Fimages)].StretchedHeight := nh;
Fimages[high(Fimages)].IsAlphaImage := false;
{$IFDEF DEBUGGOUTPUT}
writeln('TextureCount : ' + inttostr(high(Fimages) + 1));
{$ENDIF}
End
Else
Raise Exception.create('Error Image ' + extractfilename(name) + ' has invalid Width / Height, has to be 2^x.');
b.free;
End;
Function TOpenGL_GraphikEngine.GetInfo(Value: String): TGraphikItem;
Var
i: Integer;
Begin
Value := LowerCase(Value);
For i := 0 To high(Fimages) Do
If pos(value, Fimages[i].Name) <> 0 Then Begin
result := Fimages[i];
exit;
End;
Raise Exception.create('Error could not find "' + Value + '" in List.');
End;
Function TOpenGL_GraphikEngine.GetInfo(Value: integer): TGraphikItem;
Var
i: Integer;
Begin
For i := 0 To high(Fimages) Do
If Fimages[i].Image = Value Then Begin
result := Fimages[i];
exit;
End;
Raise Exception.create('Error could not find image "' + inttostr(value) + '" in List.');
End;
Function TOpenGL_GraphikEngine.Find(Value: String; ExceptionOnNotExists: Boolean
): integer;
Var
i: Integer;
Begin
result := 0;
Value := LowerCase(Value);
For i := 0 To high(Fimages) Do Begin
If pos(value, Fimages[i].Name) <> 0 Then Begin
result := Fimages[i].Image;
exit;
End;
End;
If ExceptionOnNotExists Then Begin
(*
Will Man Debuggen so ist es manchmal sinnvoller eine Message zu haben, anstatt einer Exception
*)
// showmessage('Error Could not Find "' + Value + '" in List.');
Raise Exception.create('Error Could not Find "' + Value + '" in List.');
End;
End;
Function TOpenGL_GraphikEngine.FindItem(Value: String;
ExceptionOnNotExists: Boolean): TGraphikItem;
Var
i: Integer;
Begin
result.Image := 0;
Value := LowerCase(Value);
For i := 0 To high(Fimages) Do Begin
If pos(value, Fimages[i].Name) <> 0 Then Begin
result := Fimages[i];
exit;
End;
End;
If ExceptionOnNotExists Then Begin
(*
Will Man Debuggen so ist es manchmal sinnvoller eine Message zu haben, anstatt einer Exception
*)
// showmessage('Error Could not Find "' + Value + '" in List.');
Raise Exception.create('Error Could not Find "' + Value + '" in List.');
End;