unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, OleCtrls, CamCaptureCtlLib_TLB;

type
  TForm1 = class(TForm)
    CamCaptureCtl1: TCamCaptureCtl;
    Label1: TLabel;
    Label2: TLabel;
    ComboBox1: TComboBox;
    ComboBox2: TComboBox;
    Button1: TButton;
    Button2: TButton;
    Label3: TLabel;
    ComboBox3: TComboBox;
    Button3: TButton;
    GroupBox1: TGroupBox;
    RadioButton1: TRadioButton;
    RadioButton2: TRadioButton;
    RadioButton3: TRadioButton;
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure FormShow(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure ComboBox1Change(Sender: TObject);
    procedure ComboBox2Change(Sender: TObject);
    procedure ComboBox3Change(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure RadioButton1Click(Sender: TObject);
    procedure RadioButton2Click(Sender: TObject);
    procedure RadioButton3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
    CamCaptureCtl1.CloseDevice();
end;


procedure TForm1.FormShow(Sender: TObject);
var
i,j,pos,tmpVal:integer;
devCount,resCount:integer;
devName,resStr :string;
strs :TStrings;

begin
    devCount:= CamCaptureCtl1.GetDeviceCount();
    if devCount<=0 then
      Exit;
    if devCount>0 then
    begin
        for i:=0 to devCount-1 do
        begin
           devName:=CamCaptureCtl1.GetDeviceName(i);
           //showmessage( devName);
           ComboBox1.Items.Add(devName);
        end;
        if devCount>1 then
          begin
            ComboBox1.ItemIndex:=1;  //默认打开副摄像头
          end
        else
          begin
            ComboBox1.ItemIndex:=0;
          end;
    end;

    resCount:= CamCaptureCtl1.GetResolutionCount(ComboBox1.ItemIndex);
    if resCount<=0 then
    begin
       showmessage('获取分辨率信息异常！');
       Exit;
    end;

    pos:=0;
    tmpVal:=0;
    for i:=0 to resCount-1 do
    begin
      resStr:=CamCaptureCtl1.GetResolution(i);
      ComboBox2.Items.Add(resStr);
      strs:= TStringList.Create;
      strs.Delimiter:='*';
      strs.DelimitedText:=resStr;
      if StrToInt(strs[0])> tmpVal then  //选出最大分辨率
      begin
          tmpVal:= StrToInt(strs[0]);
          pos:=i;
      end;
    end;
    ComboBox2.ItemIndex:= pos;
end;


//打开设备
procedure TForm1.Button1Click(Sender: TObject);
var
iRest :integer;
width,height: integer;
strs :TStrings;
begin
      if ComboBox2.Items.Count>0 then
      begin
         strs:= TStringList.Create;
         strs.Delimiter:='*';
         strs.DelimitedText:=ComboBox2.Text;
         if strs.Count>0 then
         begin
            width:=StrToInt(strs[0]);
            height:= StrToInt(strs[1]);
            iRest:=CamCaptureCtl1.OpenDevice(ComboBox1.ItemIndex,width,height);
            if iRest<>0 then
               showmessage('打开设备失败！');
         end;
      end;
end;


//关闭设备
procedure TForm1.Button2Click(Sender: TObject);
begin
  CamCaptureCtl1.CloseDevice();
end;


//切换摄像头
procedure TForm1.ComboBox1Change(Sender: TObject);
var
i,j,pos,tmpVal:integer;
iRest :integer;
resCount:integer;
resStr :string;
strs :TStrings;

begin
    resCount:= CamCaptureCtl1.GetResolutionCount(ComboBox1.ItemIndex);
    if resCount<=0 then
    begin
       showmessage('获取分辨率信息异常！');
       Exit;
    end;

    pos:=0;
    tmpVal:=0;
    for i:=0 to resCount-1 do
    begin
      resStr:=CamCaptureCtl1.GetResolution(i);
      ComboBox2.Items.Add(resStr);
      strs:= TStringList.Create;
      strs.Delimiter:='*';
      strs.DelimitedText:=resStr;
      if StrToInt(strs[0])> tmpVal then  //选出最大分辨率
      begin
          tmpVal:= StrToInt(strs[0]);
          pos:=i;
      end;
    end;
    ComboBox2.ItemIndex:= pos;

    if ComboBox2.Items.Count>0 then
      begin
         strs:= TStringList.Create;
         strs.Delimiter:='*';
         strs.DelimitedText:=ComboBox2.Text;
         if strs.Count>0 then
         begin
            width:=StrToInt(strs[0]);
            height:= StrToInt(strs[1]);
            iRest:=CamCaptureCtl1.OpenDevice(ComboBox1.ItemIndex,width,height);
            if iRest<>0 then
               showmessage('打开设备失败！');
         end;
      end;

end;


//切换分辨率
procedure TForm1.ComboBox2Change(Sender: TObject);
var
i,j,pos,tmpVal:integer;
iRest :integer;
strs :TStrings;
begin
      if ComboBox2.Items.Count>0 then
      begin
         strs:= TStringList.Create;
         strs.Delimiter:='*';
         strs.DelimitedText:=ComboBox2.Text;
         if strs.Count>0 then
         begin
            width:=StrToInt(strs[0]);
            height:= StrToInt(strs[1]);
            iRest:=CamCaptureCtl1.OpenDevice(ComboBox1.ItemIndex,width,height);
            if iRest<>0 then
               showmessage('切换分辨率失败！');
         end;
         //Form1.Width := 730;
         //Form1.Height := 563;
      end;
end;

//设置DPI
procedure TForm1.ComboBox3Change(Sender: TObject);
var
  val:integer;
begin
   val:= StrToInt(ComboBox3.Text);
   //CamCaptureCtl1.SetDPI(val,val);
end;


//拍照
procedure TForm1.Button3Click(Sender: TObject);
begin
     CamCaptureCtl1.CaptureImage('D:/test.jpg');
end;

procedure TForm1.RadioButton1Click(Sender: TObject);
begin
    if  RadioButton1.Checked then
    begin
        CamCaptureCtl1.SetCutType(0);
    end;
end;

procedure TForm1.RadioButton2Click(Sender: TObject);
begin
    if  RadioButton2.Checked then
    begin
        CamCaptureCtl1.SetCutType(1);
    end;
end;

procedure TForm1.RadioButton3Click(Sender: TObject);
begin
    if  RadioButton3.Checked then
    begin
        CamCaptureCtl1.SetCutType(2);
    end;
end;

end.