デスクトップをスクリーンキャプチャし、それをjpg形式で保存する方法 (ID:71964)

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本文 初心者ですがよろしくお願いします。表題のとおりのプログラムを作成したいのですが、うまくいきません。bmpファイルの保存はできるのですが、jpgファイルに変換できず、終了コード1(0x1)が吐き出されます。以下にソースコードを示すので、アドバイス等ありましたらよろしくお願いします。 // fukumura41.cpp : コンソール アプリケーション用のエントリ ポイントの定義 // #include "stdafx.h" #define WIN32_LEAN_AND_MEAN #include <windows.h> #include <stdlib.h> #include <stdio.h> #ifdef __cplusplus #define TRUE 1 #define FALSE 0 extern "C" { #endif #define XMD_H #include "jpeglib.h" #include "jerror.h" #ifdef __cplusplus } #endif #pragma comment(lib, "libjpeg.lib") BOOL SaveBitmapAsJpeg(LPCSTR pszFileName, HBITMAP hbm, INT quality, BOOL progression) { FILE *fp; BITMAP bm; struct jpeg_compress_struct comp; struct jpeg_error_mgr jerr; JSAMPLE * image_buffer; BITMAPINFO bi; HDC hDC, hMemDC; LPBYTE pbBits; INT nWidthBytes; DWORD cbBits; BOOL f; if (GetObject(hbm, sizeof(BITMAP), &bm) != sizeof(BITMAP)) return FALSE; fp = fopen(pszFileName, "wb"); if (fp == NULL) return FALSE; comp.err = jpeg_std_error(&jerr); jpeg_create_compress(&comp); jpeg_stdio_dest(&comp, fp); comp.image_width = bm.bmWidth; comp.image_height = bm.bmHeight; comp.input_components = 3; comp.in_color_space = JCS_RGB; jpeg_set_defaults(&comp); jpeg_set_quality(&comp, quality, TRUE); if (progression) jpeg_simple_progression(&comp); jpeg_start_compress(&comp, TRUE); ZeroMemory(&bi, sizeof(BITMAPINFOHEADER)); bi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER); bi.bmiHeader.biWidth = bm.bmWidth; bi.bmiHeader.biHeight = bm.bmHeight; bi.bmiHeader.biPlanes = 1; bi.bmiHeader.biBitCount = 24; f = FALSE; #define WIDTHBYTES(i) (((i) + 31) / 32 * 4) nWidthBytes = WIDTHBYTES(bm.bmWidth * 24); cbBits = nWidthBytes * bm.bmHeight; pbBits = (LPBYTE)HeapAlloc(GetProcessHeap(), 0, cbBits); if (pbBits != NULL) { image_buffer = (JSAMPLE *)HeapAlloc(GetProcessHeap(), 0, nWidthBytes); if (image_buffer != NULL) { hDC = GetDC(NULL); if (hDC != NULL) { hMemDC = CreateCompatibleDC(hDC); if (hMemDC != NULL) { f = GetDIBits(hMemDC, hbm, 0, bm.bmHeight, pbBits, (BITMAPINFO*)&bi, DIB_RGB_COLORS); DeleteDC(hMemDC); } ReleaseDC(NULL, hDC); } if (f) { INT x, y; LPBYTE src, dest; for(y = 0; y < bm.bmHeight; y++) { dest = image_buffer; src = &pbBits[(bm.bmHeight - y - 1) * nWidthBytes]; for(x = 0; x < bm.bmWidth; x++) { *dest++ = *src++; *dest++ = *src++; *dest++ = *src++; } jpeg_write_scanlines(&comp, &image_buffer, 1); } } HeapFree(GetProcessHeap(), 0, image_buffer); } HeapFree(GetProcessHeap(), 0, pbBits); } jpeg_finish_compress(&comp); jpeg_destroy_compress(&comp); fclose(fp); if (!f) { DeleteFile(pszFileName); return FALSE; } return TRUE; } //#ifdef UNITTEST HBITMAP CreateWindowBitmap(HWND hWnd) { HBITMAP hbmNew; HDC hDC, hMemDC; HGDIOBJ hbmOld; RECT rc; SIZE siz; DWORD dwError; BITMAPINFO bi; VOID *pvBits; GetWindowRect(hWnd, &rc); siz.cx = rc.right - rc.left; siz.cy = rc.bottom - rc.top; hbmNew = NULL; hDC = GetWindowDC(hWnd); if (hDC != NULL) { hMemDC = CreateCompatibleDC(hDC); if (hMemDC != NULL) { ZeroMemory(&bi.bmiHeader, sizeof(BITMAPINFOHEADER)); bi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER); bi.bmiHeader.biWidth = siz.cx; bi.bmiHeader.biHeight = siz.cy; bi.bmiHeader.biPlanes = 1; bi.bmiHeader.biBitCount = 24; hbmNew = CreateDIBSection(hDC, &bi, DIB_RGB_COLORS, &pvBits, NULL, 0); if (hbmNew != NULL) { hbmOld = SelectObject(hMemDC, hbmNew); BitBlt(hMemDC, 0, 0, siz.cx, siz.cy, hDC, 0, 0, SRCCOPY); SelectObject(hMemDC, hbmOld); } else dwError = GetLastError(); DeleteDC(hMemDC); } else dwError = GetLastError(); ReleaseDC(hWnd, hDC); SetLastError(dwError); } return hbmNew; } typedef struct tagBITMAPINFOEX { BITMAPINFOHEADER bmiHeader; RGBQUAD bmiColors[256]; } BITMAPINFOEX, FAR * LPBITMAPINFOEX; BOOL SaveBitmapToFile(LPCTSTR pszFileName, HBITMAP hbm) { BOOL f; DWORD dwError; BITMAPFILEHEADER bf; BITMAPINFOEX bi; BITMAPINFOHEADER *pbmih; DWORD cb; DWORD cColors, cbColors; HDC hDC; HANDLE hFile; LPVOID pBits; BITMAP bm; if (!GetObject(hbm, sizeof(BITMAP), &bm)) return FALSE; pbmih = &bi.bmiHeader; ZeroMemory(pbmih, sizeof(BITMAPINFOHEADER)); pbmih->biSize = sizeof(BITMAPINFOHEADER); pbmih->biWidth = bm.bmWidth; pbmih->biHeight = bm.bmHeight; pbmih->biPlanes = 1; pbmih->biBitCount = bm.bmBitsPixel; pbmih->biCompression = BI_RGB; pbmih->biSizeImage = bm.bmWidthBytes * bm.bmHeight; if (bm.bmBitsPixel < 16) cColors = 1 << bm.bmBitsPixel; else cColors = 0; cbColors = cColors * sizeof(RGBQUAD); bf.bfType = 0x4d42; bf.bfReserved1 = 0; bf.bfReserved2 = 0; cb = sizeof(BITMAPFILEHEADER) + pbmih->biSize + cbColors; bf.bfOffBits = cb; bf.bfSize = cb + pbmih->biSizeImage; pBits = HeapAlloc(GetProcessHeap(), 0, pbmih->biSizeImage); if (pBits == NULL) return FALSE; f = FALSE; hDC = GetDC(NULL); if (hDC != NULL) { if (GetDIBits(hDC, hbm, 0, bm.bmHeight, pBits, (BITMAPINFO*)&bi, DIB_RGB_COLORS)) { hFile = CreateFile(pszFileName, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_WRITE_THROUGH, NULL); if (hFile != INVALID_HANDLE_VALUE) { f = WriteFile(hFile, &bf, sizeof(BITMAPFILEHEADER), &cb, NULL) && WriteFile(hFile, &bi, sizeof(BITMAPINFOHEADER), &cb, NULL) && WriteFile(hFile, bi.bmiColors, cbColors, &cb, NULL) && WriteFile(hFile, pBits, pbmih->biSizeImage, &cb, NULL); if (!f) dwError = GetLastError(); CloseHandle(hFile); if (!f) DeleteFile(pszFileName); } else dwError = GetLastError(); } else dwError = GetLastError(); ReleaseDC(NULL, hDC); } else dwError = GetLastError(); HeapFree(GetProcessHeap(), 0, pBits); SetLastError(dwError); return f; } int main(int argc, char* argv[]) { HBITMAP hbm = CreateWindowBitmap(GetDesktopWindow()); SaveBitmapToFile("Desktop.bmp", hbm); if(hbm != NULL){ printf("succes!\n"); } SaveBitmapAsJpeg("100%.jpg", hbm, 100, FALSE); DeleteObject(hbm); return 0; }