【练习】reserving.kr 之imageprc write up

补充：c++ builder 与 windows  API经典范例

#include <vcl.h>   
#pragma hdrstop   
   
#include "Unit1.h"   
//---------------------------------------------------------------------------   
#pragma package(smart_init)   
#pragma resource "*.dfm"   
TForm1 *Form1;   
//---------------------------------------------------------------------------   
__fastcall TForm1::TForm1(TComponent* Owner)   
    : TForm(Owner)   
{   
}   
//---------------------------------------------------------------------------   
   
void __fastcall TForm1::Button1Click(TObject *Sender)   
{   
//用Bitmap简化Image1图文件叙述   
Graphics::TBitmap *Bitmap = Image1->Picture->Bitmap;   
   
//建立一新暂时设定，以利图文件16位转成8位时的最适化   
BITMAPINFO bmi;   
//将bmi结构所在内存初始化   
memset(&bmi, 0, sizeof(BITMAPINFO));   
//BITMAPINFO结构包含BITMAPINFOHEADER结构+RGBQUAD结构   
//设置BITMAPINFOHEADER结构成员�   
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);//结构大小�   
bmi.bmiHeader.biWidth = Bitmap->Width;//位图宽度�   
bmi.bmiHeader.biHeight = Bitmap->Height; //位图高度�   
bmi.bmiHeader.biPlanes = 1;//目的装置平面数，必为1   
//转换成 8 位像素   
bmi.bmiHeader.biBitCount = 8; // 8位像素   
//设置RGBQUAD结构成员�   
DWORD BitMasks[3];   
BitMasks[0] = 0xFFFF;//Blue明亮度   
BitMasks[1] = 0xFFFF;//Green明亮度�   
BitMasks[2] = 0xFFFF;//Red明亮度   
//将设好的RGB结构填入到RGBQUAD结构中   
memcpy(bmi.bmiColors, BitMasks, sizeof(BitMasks));   
   
unsigned char *bits;   
//将BITMAPINFO结构创造一个新DIB图文件，并返回handle   
HBITMAP HBmp = ::CreateDIBSection(0, &bmi, DIB_RGB_COLORS,   
                                  reinterpret_cast<void **>(&bits),   
                                  NULL, NULL);   
   
if (HBmp)   
    {   
    //建立与指定DC兼容的DC   
    HDC Hdc = ::CreateCompatibleDC(0);   
    //选定新对象，并返回原有对象设置   
    HBITMAP HOldBmp = ::SelectObject(Hdc, HBmp);   
    try   
      {   
      //先由Image复制图像至暂时设备   
      ::BitBlt(Hdc, 0, 0,   
               Bitmap->Width, Bitmap->Height,   
               Bitmap->Canvas->Handle, 0, 0,   
               SRCCOPY);   
      //再由暂时设备复制图像至Form1上   
      ::BitBlt(Canvas->Handle, 10, 10,   
               Bitmap->Width, Bitmap->Height,   
               Hdc, 0, 0,   
               SRCCOPY);   
      }   
   
    catch (...)   
      {   
      //先恢复原设置，再释放对象   
      ::DeleteObject(::SelectObject(Hdc, HOldBmp));   
      //释放DC   
      ::DeleteDC(Hdc);   
      }   
    //先恢复原设置，再释放对象   
    ::DeleteObject(::SelectObject(Hdc, HOldBmp));   
    //释放DC   
    ::DeleteDC(Hdc);   
    }   
}   
//---------------------------------------------------------------------------   
   
void __fastcall TForm1::Button2Click(TObject *Sender)   
{   
//在内存中配置一个新图文件   
//在Unit1.h中加入 #include <memory>   
std::auto_ptr<Graphics::TBitmap> Bitmap(new Graphics::TBitmap());   
//设置长宽   
Bitmap->Width = Image1->Picture->Bitmap->Width;   
Bitmap->Height = Image1->Picture->Bitmap->Height;   
//设置为8位图文件   
Bitmap->PixelFormat = pf8bit;   
//将Image1复制至此新图文件，并最适化   
::BitBlt(Bitmap->Canvas->Handle, 0, 0,   
         Bitmap->Width, Bitmap->Height,   
         Image1->Canvas->Handle, 0, 0,   
         SRCCOPY);   
//再将此图文件指派回Image1   
Image1->Picture->Bitmap->Assign(Bitmap.get());   
}   
//---------------------------------------------------------------------------   
void __fastcall TForm1::FormClose(TObject *Sender, TCloseAction &Action)   
{   
//释放所有图文件   
for(int i=0;i<ComponentCount;i++)   
  if (Components[i]->ClassNameIs("TBitmap"))   
      delete Components[i];   
   
}   
//---------------------------------------------------------------------------   
   

这种代码完全看不懂，先把过程照着wp写下来，之后慢慢 分析吧，首先字符 wrong定位到算法函数：

如图为主函数：

用exescope导出dump如图

于是写出脚本，拷贝别人的：

from PIL import Image
width = 200
height = 150
image_file = open('Data_1.bin', 'rb')
data = image_file.read()
image = Image.frombuffer('RGB', (width, height), data, 'raw', 'RGB')
image = image.transpose(Image.FLIP_TOP_BOTTOM)
image.show()
image_file.close()

于是得到了这张图片