Стартовый пул

bgrabitmap/test/test4lcl_opengl/opengltest2/opengltest2.lpi

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+<?xml version="1.0" encoding="UTF-8"?>
+<CONFIG>
+  <ProjectOptions>
+    <Version Value="9"/>
+    <PathDelim Value="\"/>
+    <General>
+      <SessionStorage Value="InProjectDir"/>
+      <MainUnit Value="0"/>
+      <Title Value="opengltest2"/>
+      <ResourceType Value="res"/>
+      <UseXPManifest Value="True"/>
+      <Icon Value="0"/>
+    </General>
+    <i18n>
+      <EnableI18N LFM="False"/>
+    </i18n>
+    <VersionInfo>
+      <StringTable ProductVersion=""/>
+    </VersionInfo>
+    <BuildModes Count="1">
+      <Item1 Name="Default" Default="True"/>
+    </BuildModes>
+    <PublishOptions>
+      <Version Value="2"/>
+    </PublishOptions>
+    <RunParams>
+      <local>
+        <FormatVersion Value="1"/>
+      </local>
+    </RunParams>
+    <RequiredPackages Count="3">
+      <Item1>
+        <PackageName Value="BGRABitmapPack"/>
+      </Item1>
+      <Item2>
+        <PackageName Value="lazopenglcontext"/>
+      </Item2>
+      <Item3>
+        <PackageName Value="LCL"/>
+      </Item3>
+    </RequiredPackages>
+    <Units Count="2">
+      <Unit0>
+        <Filename Value="opengltest2.lpr"/>
+        <IsPartOfProject Value="True"/>
+      </Unit0>
+      <Unit1>
+        <Filename Value="unit1.pas"/>
+        <IsPartOfProject Value="True"/>
+        <ComponentName Value="Form1"/>
+        <HasResources Value="True"/>
+        <ResourceBaseClass Value="Form"/>
+        <UnitName Value="Unit1"/>
+      </Unit1>
+    </Units>
+  </ProjectOptions>
+  <CompilerOptions>
+    <Version Value="11"/>
+    <PathDelim Value="\"/>
+    <Target>
+      <Filename Value="opengltest2"/>
+    </Target>
+    <SearchPaths>
+      <IncludeFiles Value="$(ProjOutDir)"/>
+      <UnitOutputDirectory Value="lib\$(TargetCPU)-$(TargetOS)"/>
+    </SearchPaths>
+    <Linking>
+      <Options>
+        <Win32>
+          <GraphicApplication Value="True"/>
+        </Win32>
+      </Options>
+    </Linking>
+  </CompilerOptions>
+  <Debugging>
+    <Exceptions Count="3">
+      <Item1>
+        <Name Value="EAbort"/>
+      </Item1>
+      <Item2>
+        <Name Value="ECodetoolError"/>
+      </Item2>
+      <Item3>
+        <Name Value="EFOpenError"/>
+      </Item3>
+    </Exceptions>
+  </Debugging>
+</CONFIG>

bgrabitmap/test/test4lcl_opengl/opengltest2/opengltest2.lpr

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+program opengltest2;
+
+{$mode objfpc}{$H+}
+
+uses
+  {$IFDEF UNIX}{$IFDEF UseCThreads}
+  cthreads,
+  {$ENDIF}{$ENDIF}
+  Interfaces, // this includes the LCL widgetset
+  Forms, lazopenglcontext, Unit1
+  { you can add units after this };
+
+{$R *.res}
+
+begin
+  RequireDerivedFormResource := True;
+  Application.Initialize;
+  Application.CreateForm(TForm1, Form1);
+  Application.Run;
+end.
+

bgrabitmap/test/test4lcl_opengl/opengltest2/unit1.lfm

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+object Form1: TForm1
+  Left = 231
+  Height = 240
+  Top = 114
+  Width = 320
+  Caption = 'Rotate and zoom'
+  OnCreate = FormCreate
+  LCLVersion = '1.4.0.4'
+  object Timer1: TTimer
+    Interval = 15
+    OnTimer = Timer1Timer
+    left = 19
+    top = 16
+  end
+end

bgrabitmap/test/test4lcl_opengl/opengltest2/unit1.pas

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+unit Unit1;
+
+{
+-If you didnt saw opengltest1, go see it first then come back
+
+-OpenGL is fast, so we want to test it a bit
+-Here you will see that you can update your painting much fast without any particular cpu using or whatever
+}
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, ExtCtrls,
+  OpenGLContext, BGRABitmap, BGRABitmapTypes, BGRAOpenGL;
+
+type
+
+  { TForm1 }
+
+  TForm1 = class(TForm)
+    Timer1: TTimer;
+    procedure FormCreate(Sender: TObject);
+    procedure Timer1Timer(Sender: TObject);
+  private
+    { private declarations }
+  public
+    TexBig,TexSmall: IBGLTexture;
+    OpenGLControl: TOpenGLControl;
+    DataLoaded: boolean;
+    angle: single;
+    GoBack: boolean;
+    procedure Load;
+    procedure OpenGLControlPaint(Sender: TObject);
+  end;
+
+var
+  Form1: TForm1;
+
+implementation
+
+{$R *.lfm}
+
+{ TForm1 }
+
+procedure TForm1.FormCreate(Sender: TObject);
+begin
+  OpenGLControl := TOpenGLControl.Create(Self);
+  with OpenGLControl do
+  begin
+    Align := alClient;
+    Parent := Self;
+    OnPaint := @OpenGLControlPaint;
+    AutoResizeViewport := True;
+  end;
+  DataLoaded := False;
+  GoBack := False;
+  angle := 0;
+  WindowState := wsMaximized;
+end;
+
+procedure TForm1.Timer1Timer(Sender: TObject);
+begin
+  if not GoBack then
+  begin
+    if angle = 360 then
+      GoBack := True;
+    angle += 1;
+  end
+  else
+  begin
+    if angle = 0 then
+      GoBack := False;
+    angle -= 1;
+  end;
+  OpenGLControl.DoOnPaint;
+end;
+
+procedure TForm1.Load;
+var bmp, bmpSmall : TBGLBitmap;
+begin
+  if not DataLoaded then
+  begin
+    bmp := TBGLBitmap.Create(ExtractFilePath(Application.ExeName) + 'earth.png');
+    bmp.ResampleFilter := rfBestQuality;
+    bmpSmall := bmp.Resample(bmp.Width div 2,bmp.Height div 2) as TBGLBitmap;
+    TexBig := bmp.MakeTextureAndFree;
+    TexSmall := bmpSmall.MakeTextureAndFree;
+
+    DataLoaded := True;
+  end;
+end;
+
+procedure TForm1.OpenGLControlPaint(Sender: TObject);
+var
+  x, y, w: single;
+  tex: IBGLTexture;
+begin
+  Load;
+  BGLViewPort(OpenGLControl.Width, OpenGLControl.Height, BGRABlack);
+
+  x := OpenGLControl.Width / 2;
+  y := OpenGLControl.Height / 2;
+  w := (angle / 360) * OpenGLControl.Width;
+  if w < TexSmall.Width then
+    tex := TexSmall
+  else
+    tex := TexBig;
+  tex.StretchDrawAngle(x, y, w, w/tex.Width*tex.Height, angle, PointF(tex.Width/2,tex.Height/2), False);
+
+  OpenGLControl.SwapBuffers;
+end;
+
+end.
+