編輯 JPEG 的問題 |
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尚未結案
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st
一般會員   發表：11 回覆：21 積分：11 註冊：2004-07-02 發送簡訊給我 |
我想自己寫一個像 photoed 般可以隨意剪貼
圖檔的某一區段的程式(請參考詳圖) 基本上我已經做到可以載入 JPEG 及壓縮合存檔了
但是我不知要如何為做一個可動態張縮
的"橡皮筋"來定義要存出的區塊 範例如下: //--------------------------------------------------------------------------- void __fastcall TForm1::Button3Click(TObject *Sender)
{
TJPEGImage *jpg = new TJPEGImage();
Graphics::TBitmap *bmp1 = new Graphics::TBitmap();
bmp2 = new Graphics::TBitmap(); try
{
jpg->LoadFromFile("D:\\MyPrograms\\CPP\\EZShow\\Maastricht\\Maastricht001.jpg");
bmp1->Assign(jpg); //Change Size
bmp2->Width=500;
bmp2->Height=500; int x1,y1,x2,y2,x0,y0,dx,dy,x,y; x1=bmp1->Width;
y1=bmp1->Height;
x2=bmp2->Width;
y2=bmp2->Height;
dx=0;
x0=0;
for (x=0 ; x<=bmp2->Width-1 ; x++)
{
dy=0;
y0=0;
dx=dx+x1; while (dx>=x2)
{
x0++;
dx=dx-x2;
} for (y=0 ; y<=bmp2->Height-1 ; y++)
{
dy=dy+y1;
while (dy>=y2)
{
y0++;
dy=dy-y2;
}
bmp2->Canvas->Pixels[x][y]=bmp1->Canvas->Pixels[x0][y0];
} } //jpg->Assign(bmp2);
//jpg->SaveToFile("D:\\MyPrograms\\CPP\\EZShow\\Test1.jpg");
Image1->Picture->Assign(bmp2); }
catch (...)
{
ShowMessage("Could not load or alter JPEG Files");
} delete jpg;
delete bmp1;
//delete bmp2; }
//--------------------------------------------------------------------------- void __fastcall TForm1::PaintBox1MouseMove(TObject *Sender,
TShiftState Shift, int X, int Y)
{
//if(Drawing)
//{
PaintBox1->Canvas->CopyRect(PaintBox1->ClientRect, Image1->Canvas, Image1->ClientRect);
PaintBox1->Canvas->Brush->Style=bsClear;
PaintBox1->Canvas->Pen->Style=psDot;
PaintBox1->Canvas->Pen->Color=clBlack;
PaintBox1->Canvas->MoveTo(X, 0);
PaintBox1->Canvas->LineTo(X, PaintBox1->Height);
PaintBox1->Canvas->MoveTo(0, Y);
PaintBox1->Canvas->LineTo(PaintBox1->Width, Y);
//}
}
//--------------------------------------------------------------------------- void __fastcall TForm1::PaintBox1MouseDown(TObject *Sender,
TMouseButton Button, TShiftState Shift, int X, int Y)
{
if (!Drawing)
{
Image1->Picture->Assign(bmp2);
} Drawing = true;
rRect.Left=X;
rRect.Top=Y;
}
//--------------------------------------------------------------------------- void __fastcall TForm1::PaintBox1MouseUp(TObject *Sender,
TMouseButton Button, TShiftState Shift, int X, int Y)
{
rRect.Right=X;
rRect.Bottom=Y;
Image1->Canvas->Brush->Style=bsClear;
//Image1->Canvas->FrameRect(rRect);
Image1->Canvas->Rectangle(rRect.Left,rRect.Top,rRect.Right,rRect.Bottom);
Drawing = false;
}
//--------------------------------------------------------------------------- void __fastcall TForm1::FormCreate(TObject *Sender)
{
Drawing=true;
}
//---------------------------------------------------------------------------
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RaynorPao
版主   發表：139 回覆：3622 積分：7025 註冊：2002-08-12 發送簡訊給我 |
引言: 我想自己寫一個像 photoed 般可以隨意剪貼 圖檔的某一區段的程式(請參考詳圖) 基本上我已經做到可以載入 JPEG 及壓縮合存檔了 但是我不知要如何為做一個可動態張縮 的"橡皮筋"來定義要存出的區塊 範例如下: //--------------------------------------------------------------------------- void __fastcall TForm1::Button3Click(TObject *Sender) { TJPEGImage *jpg = new TJPEGImage(); Graphics::TBitmap *bmp1 = new Graphics::TBitmap(); bmp2 = new Graphics::TBitmap(); try { jpg->LoadFromFile("D:\\MyPrograms\\CPP\\EZShow\\Maastricht\\Maastricht001.jpg"); bmp1->Assign(jpg); //Change Size bmp2->Width=500; bmp2->Height=500; int x1,y1,x2,y2,x0,y0,dx,dy,x,y; x1=bmp1->Width; y1=bmp1->Height; x2=bmp2->Width; y2=bmp2->Height; dx=0; x0=0; for (x=0 ; x<=bmp2->Width-1 ; x++) { dy=0; y0=0; dx=dx+x1; while (dx>=x2) { x0++; dx=dx-x2; } for (y=0 ; y<=bmp2->Height-1 ; y++) { dy=dy+y1; while (dy>=y2) { y0++; dy=dy-y2; } bmp2->Canvas->Pixels[x][y]=bmp1->Canvas->Pixels[x0][y0]; } } //jpg->Assign(bmp2); //jpg->SaveToFile("D:\\MyPrograms\\CPP\\EZShow\\Test1.jpg"); Image1->Picture->Assign(bmp2); } catch (...) { ShowMessage("Could not load or alter JPEG Files"); } delete jpg; delete bmp1; //delete bmp2; } //--------------------------------------------------------------------------- void __fastcall TForm1::PaintBox1MouseMove(TObject *Sender, TShiftState Shift, int X, int Y) { //if(Drawing) //{ PaintBox1->Canvas->CopyRect(PaintBox1->ClientRect, Image1->Canvas, Image1->ClientRect); PaintBox1->Canvas->Brush->Style=bsClear; PaintBox1->Canvas->Pen->Style=psDot; PaintBox1->Canvas->Pen->Color=clBlack; PaintBox1->Canvas->MoveTo(X, 0); PaintBox1->Canvas->LineTo(X, PaintBox1->Height); PaintBox1->Canvas->MoveTo(0, Y); PaintBox1->Canvas->LineTo(PaintBox1->Width, Y); //} } //--------------------------------------------------------------------------- void __fastcall TForm1::PaintBox1MouseDown(TObject *Sender, TMouseButton Button, TShiftState Shift, int X, int Y) { if (!Drawing) { Image1->Picture->Assign(bmp2); } Drawing = true; rRect.Left=X; rRect.Top=Y; } //--------------------------------------------------------------------------- void __fastcall TForm1::PaintBox1MouseUp(TObject *Sender, TMouseButton Button, TShiftState Shift, int X, int Y) { rRect.Right=X; rRect.Bottom=Y; Image1->Canvas->Brush->Style=bsClear; //Image1->Canvas->FrameRect(rRect); Image1->Canvas->Rectangle(rRect.Left,rRect.Top,rRect.Right,rRect.Bottom); Drawing = false; } //--------------------------------------------------------------------------- void __fastcall TForm1::FormCreate(TObject *Sender) { Drawing=true; } //---------------------------------------------------------------------------st 你好: 你講的功能，是不是類似這個樣子？
------
-- 若您已經得到滿意的答覆，請適時結案!! -- -- 欲知前世因，今生受者是；欲知來世果，今生做者是 -- -- 一切有為法，如夢幻泡影，如露亦如電，應作如是觀 -- |
發表時間：2004-07-09 16:49:29
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