用DirectDraw封裝的位圖動畫類

頭文件

#pragma once #include <vector> using namespace std; #include <DShow.h> #include <uuids.h> #define DXIMAGE_WIDTH 1024 #define DXIMAGE_HEIGHT 768 class CDXImage { public: CDXImage(void); ~CDXImage(void); // public: // 文件中載入位圖 BOOL LoadImageFromFile(char *pFileName, int cx, int cy); // 載入圖像 void LoadDXImage(char* pBits, int cx, int cy); // 顯示圖像 void Display(CDC *pDC); // 初始化DirectDraw void InitDraw(HWND hWnd); // 恢複丟失的圖麵 void RestoreAll(HWND hWnd); protected: // 釋放對象 void ReleaseObject(); // DX objects private: IDirectDraw7 *m_lpDD; // DirectDraw Object IDirectDrawSurface7 *m_lpDDSPrimary; // Primary Surface Object IDirectDrawSurface7 *m_lppDDSBackBuffer; // BackBuffer Surface Object // Image Object private: vector<HBITMAP> m_vpBMPs; // BMP Objects Array HWND m_hWnd; };

源文件

#include "StdAfx.h" #include "DXImage.h" CDXImage::CDXImage(void) { // 成員變量初始化 this->m_lpDD = NULL; this->m_lpDDSPrimary = NULL; this->m_lppDDSBackBuffer = NULL; this->m_hWnd = NULL; } CDXImage::~CDXImage(void) { ReleaseObject(); } /************************************************************************ * 函數名稱：LoadDXImage * 函數功能：從DSP端接收圖像數據 * 函數參數： * char *pBits : 圖像數據 * int cx : 圖像寬度 * int cy : 圖像高度 * 返回值：void ************************************************************************/ void CDXImage::LoadDXImage(char *pBits, int cx,int cy) { } /************************************************************************ * 函數名稱：LoadImageFromFile * 函數功能：從硬盤文件中讀取圖像 * 函數參數： * char *pFileName : 圖像文件名 * int cx : 圖像寬度 * int cy : 圖像高度 * 返回值類型：BOOL true : 文件載入成功 false: 文件載入失敗 ************************************************************************/ BOOL CDXImage::LoadImageFromFile(char *pFileName, int cx, int cy) { HBITMAP hbmp; hbmp = (HBITMAP)LoadImage(AfxGetInstanceHandle(), pFileName, IMAGE_BITMAP, cx, cy, LR_LOADFROMFILE); if (hbmp == NULL) { AfxMessageBox("Failed to Load Image /n Please Check the File Path!"); return FALSE; } m_vpBMPs.push_back(hbmp); return TRUE; } /************************************************************************ * 函數名稱：InitDraw * 函數功能：初始化DirectDraw * 函數參數： * HWND hWnd : 圖像顯示窗口句柄 * 返回值類型：void ************************************************************************/ void CDXImage::InitDraw(HWND hWnd) { ASSERT(m_lpDD == NULL); ASSERT(m_lpDDSPrimary == NULL); ASSERT(m_lppDDSBackBuffer == NULL); ASSERT(m_vpBMPs.size() == 0); ASSERT(m_hWnd == NULL); m_hWnd = hWnd; // 創建DirectDraw對象 HRESULT hr; hr = DirectDrawCreateEx(NULL, (VOID**)&m_lpDD, IID_IDirectDraw7, NULL); if (FAILED(hr)) { AfxMessageBox("Failed to Create DirectDraw Object!"); return; } hr = m_lpDD->SetCooperativeLevel(m_hWnd, DDSCL_NORMAL); if (FAILED(hr)) { AfxMessageBox("Failed to Initialize DirectDraw"); return; } // 創建主圖麵 DDSURFACEDESC2 ddsd; memset(&ddsd, 0, sizeof(ddsd)); ddsd.dwSize = sizeof(ddsd); ddsd.dwFlags = DDSD_CAPS; ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE; hr = m_lpDD->CreateSurface(&ddsd, &m_lpDDSPrimary, NULL); if (FAILED(hr)) { AfxMessageBox("Failed to Create primary surface!"); return; } // 創建裁剪 IDirectDrawClipper *lpClipper = NULL; hr = m_lpDD->CreateClipper(NULL, &lpClipper, NULL); if (FAILED(hr)) { AfxMessageBox("Failed to Create Clipper!"); return; } hr = lpClipper->SetHWnd(0, hWnd); if (FAILED(hr)) { AfxMessageBox("Failed to Create Window Clipper!"); return; } hr = m_lpDDSPrimary->SetClipper(lpClipper); if (FAILED(hr)) { AfxMessageBox("Failed to Set Clipper of Primary Surface!"); return; } lpClipper->Release(); // 創建輔助畫麵 memset(&ddsd, 0, sizeof(ddsd)); ddsd.dwSize = sizeof(ddsd); ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH; ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN; ddsd.dwWidth = DXIMAGE_WIDTH; ddsd.dwHeight = DXIMAGE_HEIGHT; hr = m_lpDD->CreateSurface(&ddsd, &m_lppDDSBackBuffer, NULL); if (FAILED(hr)) { AfxMessageBox("Failed to Create Assistant Surface!"); return; } } /************************************************************************ * 函數名稱：Display * 函數功能：顯示圖像 * 函數參數： * CDC pDC : 圖像顯示設備上下文 * 返回值類型：void ************************************************************************/ void CDXImage::Display(CDC *pDC = NULL) { // 繪製輔助圖麵 HRESULT hr; DDSURFACEDESC2 desc; memset(&desc, 0, sizeof(desc)); desc.dwSize = sizeof(desc); hr = m_lppDDSBackBuffer->GetSurfaceDesc(&desc); if (FAILED(hr)) { AfxMessageBox("Failed to Get Assistant Surface Descriptor"); return; } for (vector<HBITMAP>::iterator it = m_vpBMPs.begin(); it != m_vpBMPs.end(); it++) { // 獲取設備DC HDC hDC; if (m_lppDDSBackBuffer->GetDC(&hDC) != DD_OK) { return; } // 保存DC CDC dc; //dbg dc.m_hDC = hDC; int nSavedDC = dc.SaveDC(); CDC memDC; memDC.CreateCompatibleDC(&dc); HBITMAP hbmp = *it; memDC.SelectObject(hbmp); dc.BitBlt(0, 0, DXIMAGE_WIDTH, DXIMAGE_HEIGHT, &memDC, 0, 0, SRCCOPY); memDC.DeleteDC(); DeleteObject(hbmp); //m_vpBMPs.erase(it); CRect rcClient; GetClientRect(m_hWnd, &rcClient); ClientToScreen(m_hWnd, &rcClient.TopLeft()); ClientToScreen(m_hWnd, &rcClient.BottomRight()); dc.RestoreDC(nSavedDC); dc.m_hDC = NULL; m_lppDDSBackBuffer->ReleaseDC(hDC); m_lpDDSPrimary->Blt(&rcClient, m_lppDDSBackBuffer, NULL, DDBLT_WAIT, NULL); } } /************************************************************************ * 函數名稱：ReleaseObject * 函數功能：釋放DirectDraw對象 * 函數參數：無 * 返回值類型：void ************************************************************************/ void CDXImage::ReleaseObject() { // 刪除對象 if (m_lpDDSPrimary != NULL) { m_lpDDSPrimary->Release(); m_lpDDSPrimary = NULL; } if (m_lppDDSBackBuffer != NULL) { m_lppDDSBackBuffer->Release(); m_lppDDSBackBuffer = NULL; } if (m_lpDD != NULL) { m_lpDD->Release(); m_lpDD = NULL; } } /************************************************************************ * 函數名稱：RestoreAll * 函數功能：所有DirectDraw對象複位 * 函數參數： HWND hWnd : 圖像顯示設備句柄 * 返回值類型：void ************************************************************************/ void CDXImage::RestoreAll(HWND hWnd) { HRESULT hr; hr = m_lpDDSPrimary->Restore(); if (hr == DDERR_WRONGMODE) { TRACE("Dispaly model changed"); ReleaseObject(); m_hWnd = hWnd; InitDraw(m_hWnd); return; } else if (FAILED(hr)) { return; } if (FAILED(m_lppDDSBackBuffer->Restore())) { return; } }

用法：

適用於Win32平台

一、創建一個CDXImage類對象

CDXImage m_DXImage;

二、初始化並載入位圖

m_DXImage.InitDraw(GetSafeHwnd()); // 初始化DX圖像對象 m_DXImage.LoadImageFromFile("pics//0.bmp", 1024, 768); m_DXImage.LoadImageFromFile("pics//2.bmp", 1024, 768);

三、顯示位圖

m_DXImage.Display(NULL);

然後可借助定時器使用。