//用 Bitmap 显示图像
var
g: TGPGraphics;
bit: TGPBitmap;
begin
g := TGPGraphics.Create(Canvas.Handle);
bit := TGPBitmap.Create('c:\temp\x.jpg');
g.DrawImage(bit, 11, 11); {默认大小竟然和 1:1 不一样, 是不是分辨率的问题?}
g.DrawImage(bit, 11, 11, bit.GetWidth, bit.GetHeight); {1:1}
g.DrawImage(bit, 11, 11, bit.GetWidth*0.5, bit.GetHeight*0.5); {1:2}
bit.Free;
g.Free;
end;
//复制像素
var
g: TGPGraphics;
bit1,bit2: TGPBitmap;
row,column,width,height: Integer;
color: TGPColor;
begin
g := TGPGraphics.Create(Canvas.Handle);
bit1 := TGPBitmap.Create('c:\temp\x.jpg');
width := bit1.GetWidth;
height := bit1.GetHeight;
bit2 := TGPBitmap.Create(width, height);
for row := 0 to height - 1 do
begin
for column := 0 to width - 1 do
begin
bit1.GetPixel(column, row, color);
bit2.SetPixel(column, row, color);
end;
end;
g.DrawImage(bit1, 0, 0, width, height);
g.DrawImage(bit2, width, 0, width, height);
bit1.Free;
bit2.Free;
g.Free;
end;