unit1.cpp

来自「本书《C++Builder与WindowsAPI经典范例》附含配套光盘包括132」· C++ 代码 · 共 28 行

//---------------------------------------------------------------------------
#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)
{
Graphics::TBitmap* Bitmap = Image1->Picture->Bitmap;
//声明RGB色盘数组
RGBQUAD rgbQ[256];
memset(rgbQ, 0, 256);
//取得Image1的色盘，并逐一修改颜色
if (::GetDIBColorTable(Bitmap->Canvas->Handle, 0, 256, rgbQ))
   {
   for (int index = 0; index < 256; index++)
      {
      // floor函数 #include <math>
      //取出色盘中每一RGB加以平均，再提升亮度