diff options
Diffstat (limited to 'contrib/visupng/VisualPng.c')
| -rw-r--r-- | contrib/visupng/VisualPng.c | 291 |
1 files changed, 148 insertions, 143 deletions
diff --git a/contrib/visupng/VisualPng.c b/contrib/visupng/VisualPng.c index 2018999a0..009f120e3 100644 --- a/contrib/visupng/VisualPng.c +++ b/contrib/visupng/VisualPng.c @@ -1,41 +1,42 @@ -//------------------------------------ -// VisualPng.C -- Shows a PNG image -//------------------------------------ +/*------------------------------------ + * VisualPng.C -- Shows a PNG image + *------------------------------------ + * + * Copyright 2000, Willem van Schaik. + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ -// Copyright 2000, Willem van Schaik. +/* switches */ -// This code is released under the libpng license. -// For conditions of distribution and use, see the disclaimer -// and license in png.h - -// switches - -// defines +/* defines */ #define PROGNAME "VisualPng" #define LONGNAME "Win32 Viewer for PNG-files" #define VERSION "1.0 of 2000 June 07" -// constants +/* constants */ #define MARGIN 8 -// standard includes +/* standard includes */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <windows.h> -// application includes +/* application includes */ #include "png.h" #include "pngfile.h" #include "resource.h" -// macros +/* macros */ -// function prototypes +/* function prototypes */ LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM); BOOL CALLBACK AboutDlgProc (HWND, UINT, WPARAM, LPARAM) ; @@ -65,14 +66,14 @@ BOOL FillBitmap ( BYTE *pbImage, int cxImgSize, int cyImgSize, int cImgChannels, BOOL bStretched); -// a few global variables +/* a few global variables */ static char *szProgName = PROGNAME; static char *szAppName = LONGNAME; static char *szIconName = PROGNAME; static char szCmdFileName [MAX_PATH]; -// MAIN routine +/* MAIN routine */ int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) @@ -90,7 +91,7 @@ int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, wndclass.hInstance = hInstance; wndclass.hIcon = LoadIcon (hInstance, szIconName) ; wndclass.hCursor = LoadCursor (NULL, IDC_ARROW); - wndclass.hbrBackground = NULL; // (HBRUSH) GetStockObject (GRAY_BRUSH); + wndclass.hbrBackground = NULL; /* (HBRUSH) GetStockObject (GRAY_BRUSH); */ wndclass.lpszMenuName = szProgName; wndclass.lpszClassName = szProgName; @@ -101,7 +102,7 @@ int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, return 0; } - // if filename given on commandline, store it + /* if filename given on commandline, store it */ if ((szCmdLine != NULL) && (*szCmdLine != '\0')) if (szCmdLine[0] == '"') strncpy (szCmdFileName, szCmdLine + 1, strlen(szCmdLine) - 2); @@ -110,20 +111,20 @@ int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, else strcpy (szCmdFileName, ""); - // calculate size of window-borders + /* calculate size of window-borders */ ixBorders = 2 * (GetSystemMetrics (SM_CXBORDER) + GetSystemMetrics (SM_CXDLGFRAME)); iyBorders = 2 * (GetSystemMetrics (SM_CYBORDER) + GetSystemMetrics (SM_CYDLGFRAME)) + GetSystemMetrics (SM_CYCAPTION) + GetSystemMetrics (SM_CYMENUSIZE) + - 1; /* WvS: don't ask me why? */ + 1; /* WvS: don't ask me why? */ hwnd = CreateWindow (szProgName, szAppName, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 512 + 2 * MARGIN + ixBorders, 384 + 2 * MARGIN + iyBorders, -// CW_USEDEFAULT, CW_USEDEFAULT, +/* CW_USEDEFAULT, CW_USEDEFAULT, */ NULL, NULL, hInstance, NULL); ShowWindow (hwnd, iCmdShow); @@ -180,29 +181,29 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, strcpy (szImgPathName, ""); - // in case we process file given on command-line + /* in case we process file given on command-line */ if (szCmdFileName[0] != '\0') { strcpy (szImgPathName, szCmdFileName); - // read the other png-files in the directory for later - // next/previous commands + /* read the other png-files in the directory for later */ + /* next/previous commands */ BuildPngList (szImgPathName, &pPngFileList, &iPngFileCount, &iPngFileIndex); - // load the image from file + /* load the image from file */ if (!LoadImageFile (hwnd, szImgPathName, &pbImage, &cxImgSize, &cyImgSize, &cImgChannels, &bkgColor)) return 0; - // invalidate the client area for later update + /* invalidate the client area for later update */ InvalidateRect (hwnd, NULL, TRUE); - // display the PNG into the DIBitmap + /* display the PNG into the DIBitmap */ DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize, pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched); @@ -214,11 +215,11 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, cxWinSize = LOWORD (lParam); cyWinSize = HIWORD (lParam); - // invalidate the client area for later update + /* invalidate the client area for later update */ InvalidateRect (hwnd, NULL, TRUE); - // display the PNG into the DIBitmap + /* display the PNG into the DIBitmap */ DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize, pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched); @@ -242,28 +243,28 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, { case IDM_FILE_OPEN: - // show the File Open dialog box + /* show the File Open dialog box */ if (!PngFileOpenDlg (hwnd, szImgPathName, szTitleName)) return 0; - // read the other png-files in the directory for later - // next/previous commands + /* read the other png-files in the directory for later */ + /* next/previous commands */ BuildPngList (szImgPathName, &pPngFileList, &iPngFileCount, &iPngFileIndex); - // load the image from file + /* load the image from file */ if (!LoadImageFile (hwnd, szImgPathName, &pbImage, &cxImgSize, &cyImgSize, &cImgChannels, &bkgColor)) return 0; - // invalidate the client area for later update + /* invalidate the client area for later update */ InvalidateRect (hwnd, NULL, TRUE); - // display the PNG into the DIBitmap + /* display the PNG into the DIBitmap */ DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize, pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched); @@ -272,12 +273,12 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, case IDM_FILE_SAVE: - // show the File Save dialog box + /* show the File Save dialog box */ if (!PngFileSaveDlg (hwnd, szImgPathName, szTitleName)) return 0; - // save the PNG to a disk file + /* save the PNG to a disk file */ SetCursor (LoadCursor (NULL, IDC_WAIT)); ShowCursor (TRUE); @@ -295,55 +296,55 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, case IDM_FILE_NEXT: - // read next entry in the directory + /* read next entry in the directory */ if (SearchPngList (pPngFileList, iPngFileCount, &iPngFileIndex, NULL, szImgPathName)) { if (strcmp (szImgPathName, "") == 0) return 0; - - // load the image from file - + + /* load the image from file */ + if (!LoadImageFile (hwnd, szImgPathName, &pbImage, &cxImgSize, &cyImgSize, &cImgChannels, &bkgColor)) return 0; - - // invalidate the client area for later update - + + /* invalidate the client area for later update */ + InvalidateRect (hwnd, NULL, TRUE); - - // display the PNG into the DIBitmap - + + /* display the PNG into the DIBitmap */ + DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize, pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched); } - + return 0; case IDM_FILE_PREVIOUS: - // read previous entry in the directory + /* read previous entry in the directory */ if (SearchPngList (pPngFileList, iPngFileCount, &iPngFileIndex, szImgPathName, NULL)) { - + if (strcmp (szImgPathName, "") == 0) return 0; - - // load the image from file - + + /* load the image from file */ + if (!LoadImageFile (hwnd, szImgPathName, &pbImage, &cxImgSize, &cyImgSize, &cImgChannels, &bkgColor)) return 0; - - // invalidate the client area for later update - + + /* invalidate the client area for later update */ + InvalidateRect (hwnd, NULL, TRUE); - - // display the PNG into the DIBitmap - + + /* display the PNG into the DIBitmap */ + DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize, pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched); } @@ -352,9 +353,9 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, case IDM_FILE_EXIT: - // more cleanup needed... + /* more cleanup needed... */ - // free image buffer + /* free image buffer */ if (pDib != NULL) { @@ -362,7 +363,7 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, pDib = NULL; } - // free file-list + /* free file-list */ if (pPngFileList != NULL) { @@ -370,7 +371,7 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, pPngFileList = NULL; } - // let's go ... + /* let's go ... */ exit (0); @@ -383,11 +384,11 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, else CheckMenuItem (hMenu, IDM_OPTIONS_STRETCH, MF_UNCHECKED); - // invalidate the client area for later update + /* invalidate the client area for later update */ InvalidateRect (hwnd, NULL, TRUE); - // display the PNG into the DIBitmap + /* display the PNG into the DIBitmap */ DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize, pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched); @@ -398,7 +399,7 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, DialogBox (hInstance, TEXT ("AboutBox"), hwnd, AboutDlgProc) ; return 0; - } // end switch + } /* end switch */ break; @@ -450,10 +451,10 @@ BOOL CALLBACK AboutDlgProc (HWND hDlg, UINT message, return FALSE ; } -//--------------- -// CenterAbout -//--------------- - +/*--------------- + * CenterAbout + *--------------- + */ BOOL CenterAbout (HWND hwndChild, HWND hwndParent) { RECT rChild, rParent, rWorkArea; @@ -461,19 +462,19 @@ BOOL CenterAbout (HWND hwndChild, HWND hwndParent) int xNew, yNew; BOOL bResult; - // Get the Height and Width of the child window + /* Get the Height and Width of the child window */ GetWindowRect (hwndChild, &rChild); wChild = rChild.right - rChild.left; hChild = rChild.bottom - rChild.top; - // Get the Height and Width of the parent window + /* Get the Height and Width of the parent window */ GetWindowRect (hwndParent, &rParent); wParent = rParent.right - rParent.left; hParent = rParent.bottom - rParent.top; - // Get the limits of the 'workarea' + /* Get the limits of the 'workarea' */ bResult = SystemParametersInfo( - SPI_GETWORKAREA, // system parameter to query or set + SPI_GETWORKAREA, /* system parameter to query or set */ sizeof(RECT), &rWorkArea, 0); @@ -483,7 +484,7 @@ BOOL CenterAbout (HWND hwndChild, HWND hwndParent) rWorkArea.bottom = GetSystemMetrics(SM_CYSCREEN); } - // Calculate new X position, then adjust for workarea + /* Calculate new X position, then adjust for workarea */ xNew = rParent.left + ((wParent - wChild) /2); if (xNew < rWorkArea.left) { xNew = rWorkArea.left; @@ -491,7 +492,7 @@ BOOL CenterAbout (HWND hwndChild, HWND hwndParent) xNew = rWorkArea.right - wChild; } - // Calculate new Y position, then adjust for workarea + /* Calculate new Y position, then adjust for workarea */ yNew = rParent.top + ((hParent - hChild) /2); if (yNew < rWorkArea.top) { yNew = rWorkArea.top; @@ -499,15 +500,15 @@ BOOL CenterAbout (HWND hwndChild, HWND hwndParent) yNew = rWorkArea.bottom - hChild; } - // Set it, and return + /* Set it, and return */ return SetWindowPos (hwndChild, NULL, xNew, yNew, 0, 0, SWP_NOSIZE | SWP_NOZORDER); } -//---------------- -// BuildPngList -//---------------- - +/*---------------- + * BuildPngList + *---------------- + */ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount, int *pFileIndex) { @@ -523,7 +524,7 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount, int i, ii; int j, jj; - // free previous file-list + /* free previous file-list */ if (*ppFileList != NULL) { @@ -531,7 +532,7 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount, *ppFileList = NULL; } - // extract foldername, filename and search-name + /* extract foldername, filename and search-name */ strcpy (szImgPathName, pstrPathName); strcpy (szImgFileName, strrchr (pstrPathName, '\\') + 1); @@ -540,7 +541,7 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount, *(strrchr (szImgFindName, '\\') + 1) = '\0'; strcat (szImgFindName, "*.png"); - // first cycle: count number of files in directory for memory allocation + /* first cycle: count number of files in directory for memory allocation */ *pFileCount = 0; @@ -554,11 +555,11 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount, } FindClose(hFind); - // allocation memory for file-list + /* allocation memory for file-list */ *ppFileList = (TCHAR *) malloc (*pFileCount * MAX_PATH); - // second cycle: read directory and store filenames in file-list + /* second cycle: read directory and store filenames in file-list */ hFind = FindFirstFile(szImgFindName, &finddata); bOk = (hFind != (HANDLE) -1); @@ -580,7 +581,7 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount, } FindClose(hFind); - // finally we must sort the file-list + /* finally we must sort the file-list */ for (i = 0; i < *pFileCount - 1; i++) { @@ -594,7 +595,7 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount, strcpy (*ppFileList + jj, *ppFileList + ii); strcpy (*ppFileList + ii, szTmp); - // check if this was the current image that we moved + /* check if this was the current image that we moved */ if (*pFileIndex == i) *pFileIndex = j; @@ -608,9 +609,10 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount, return TRUE; } -//---------------- -// SearchPngList -//---------------- +/*---------------- + * SearchPngList + *---------------- + */ BOOL SearchPngList ( TCHAR *pFileList, int FileCount, int *pFileIndex, @@ -618,30 +620,30 @@ BOOL SearchPngList ( { if (FileCount > 0) { - // get previous entry - + /* get previous entry */ + if (pstrPrevName != NULL) { if (*pFileIndex > 0) *pFileIndex -= 1; else *pFileIndex = FileCount - 1; - + strcpy (pstrPrevName, pFileList + (*pFileIndex * MAX_PATH)); } - - // get next entry - + + /* get next entry */ + if (pstrNextName != NULL) { if (*pFileIndex < FileCount - 1) *pFileIndex += 1; else *pFileIndex = 0; - + strcpy (pstrNextName, pFileList + (*pFileIndex * MAX_PATH)); } - + return TRUE; } else @@ -650,9 +652,10 @@ BOOL SearchPngList ( } } -//----------------- -// LoadImageFile -//----------------- +/*----------------- + * LoadImageFile + *----------------- + */ BOOL LoadImageFile (HWND hwnd, PTSTR pstrPathName, png_byte **ppbImage, int *pxImgSize, int *pyImgSize, @@ -660,7 +663,7 @@ BOOL LoadImageFile (HWND hwnd, PTSTR pstrPathName, { static TCHAR szTmp [MAX_PATH]; - // if there's an existing PNG, free the memory + /* if there's an existing PNG, free the memory */ if (*ppbImage) { @@ -668,7 +671,7 @@ BOOL LoadImageFile (HWND hwnd, PTSTR pstrPathName, *ppbImage = NULL; } - // Load the entire PNG into memory + /* Load the entire PNG into memory */ SetCursor (LoadCursor (NULL, IDC_WAIT)); ShowCursor (TRUE); @@ -694,10 +697,10 @@ BOOL LoadImageFile (HWND hwnd, PTSTR pstrPathName, return TRUE; } -//---------------- -// DisplayImage -//---------------- - +/*---------------- + * DisplayImage + *---------------- + */ BOOL DisplayImage (HWND hwnd, BYTE **ppDib, BYTE **ppDiData, int cxWinSize, int cyWinSize, BYTE *pbImage, int cxImgSize, int cyImgSize, int cImgChannels, @@ -705,14 +708,14 @@ BOOL DisplayImage (HWND hwnd, BYTE **ppDib, { BYTE *pDib = *ppDib; BYTE *pDiData = *ppDiData; - // BITMAPFILEHEADER *pbmfh; + /* BITMAPFILEHEADER *pbmfh; */ BITMAPINFOHEADER *pbmih; WORD wDIRowBytes; png_color bkgBlack = {0, 0, 0}; png_color bkgGray = {127, 127, 127}; png_color bkgWhite = {255, 255, 255}; - // allocate memory for the Device Independant bitmap + /* allocate memory for the Device Independant bitmap */ wDIRowBytes = (WORD) ((3 * cxWinSize + 3L) >> 2) << 2; @@ -733,7 +736,7 @@ BOOL DisplayImage (HWND hwnd, BYTE **ppDib, *ppDib = pDib; memset (pDib, 0, sizeof(BITMAPINFOHEADER)); - // initialize the dib-structure + /* initialize the dib-structure */ pbmih = (BITMAPINFOHEADER *) pDib; pbmih->biSize = sizeof(BITMAPINFOHEADER); @@ -745,11 +748,11 @@ BOOL DisplayImage (HWND hwnd, BYTE **ppDib, pDiData = pDib + sizeof(BITMAPINFOHEADER); *ppDiData = pDiData; - // first fill bitmap with gray and image border + /* first fill bitmap with gray and image border */ InitBitmap (pDiData, cxWinSize, cyWinSize); - // then fill bitmap with image + /* then fill bitmap with image */ if (pbImage) { @@ -762,16 +765,16 @@ BOOL DisplayImage (HWND hwnd, BYTE **ppDib, return TRUE; } -//-------------- -// InitBitmap -//-------------- - +/*-------------- + * InitBitmap + *-------------- + */ BOOL InitBitmap (BYTE *pDiData, int cxWinSize, int cyWinSize) { BYTE *dst; int x, y, col; - // initialize the background with gray + /* initialize the background with gray */ dst = pDiData; for (y = 0; y < cyWinSize; y++) @@ -779,13 +782,13 @@ BOOL InitBitmap (BYTE *pDiData, int cxWinSize, int cyWinSize) col = 0; for (x = 0; x < cxWinSize; x++) { - // fill with GRAY + /* fill with GRAY */ *dst++ = 127; *dst++ = 127; *dst++ = 127; col += 3; } - // rows start on 4 byte boundaries + /* rows start on 4 byte boundaries */ while ((col % 4) != 0) { dst++; @@ -796,10 +799,10 @@ BOOL InitBitmap (BYTE *pDiData, int cxWinSize, int cyWinSize) return TRUE; } -//-------------- -// FillBitmap -//-------------- - +/*-------------- + * FillBitmap + *-------------- + */ BOOL FillBitmap ( BYTE *pDiData, int cxWinSize, int cyWinSize, BYTE *pbImage, int cxImgSize, int cyImgSize, int cImgChannels, @@ -824,11 +827,12 @@ BOOL FillBitmap ( cxNewSize = cxWinSize - 2 * MARGIN; cyNewSize = cyWinSize - 2 * MARGIN; - // stretch the image to it's window determined size + /* stretch the image to it's window determined size */ - // the following two are the same, but the first has side-effects - // because of rounding -// if ((cyNewSize / cxNewSize) > (cyImgSize / cxImgSize)) + /* the following two are mathematically the same, but the first + * has side-effects because of rounding + */ +/* if ((cyNewSize / cxNewSize) > (cyImgSize / cxImgSize)) */ if ((cyNewSize * cxImgSize) > (cyImgSize * cxNewSize)) { cyNewSize = cxNewSize * cyImgSize / cxImgSize; @@ -867,12 +871,12 @@ BOOL FillBitmap ( } } - // calculate row-bytes + /* calculate row-bytes */ wImgRowBytes = cImgChannels * cxNewSize; wDIRowBytes = (WORD) ((cDIChannels * cxWinSize + 3L) >> 2) << 2; - // copy image to screen + /* copy image to screen */ for (yImg = 0, yWin = cyImgPos; yImg < cyNewSize; yImg++, yWin++) { @@ -888,7 +892,7 @@ BOOL FillBitmap ( r = *src++; g = *src++; b = *src++; - *dst++ = b; /* note the reverse order */ + *dst++ = b; /* note the reverse order */ *dst++ = g; *dst++ = r; if (cImgChannels == 4) @@ -898,7 +902,7 @@ BOOL FillBitmap ( } } - // free memory + /* free memory */ if (pStretchedImage != NULL) { @@ -908,28 +912,28 @@ BOOL FillBitmap ( } - // process the image not-stretched + /* process the image not-stretched */ else { - // calculate the central position + /* calculate the central position */ cxImgPos = (cxWinSize - cxImgSize) / 2; cyImgPos = (cyWinSize - cyImgSize) / 2; - // check for image larger than window + /* check for image larger than window */ if (cxImgPos < MARGIN) cxImgPos = MARGIN; if (cyImgPos < MARGIN) cyImgPos = MARGIN; - // calculate both row-bytes + /* calculate both row-bytes */ wImgRowBytes = cImgChannels * cxImgSize; wDIRowBytes = (WORD) ((cDIChannels * cxWinSize + 3L) >> 2) << 2; - // copy image to screen + /* copy image to screen */ for (yImg = 0, yWin = cyImgPos; yImg < cyImgSize; yImg++, yWin++) { @@ -945,7 +949,7 @@ BOOL FillBitmap ( r = *src++; g = *src++; b = *src++; - *dst++ = b; /* note the reverse order */ + *dst++ = b; /* note the reverse order */ *dst++ = g; *dst++ = r; if (cImgChannels == 4) @@ -959,6 +963,7 @@ BOOL FillBitmap ( return TRUE; } -//----------------- -// end of source -//----------------- +/*----------------- + * end of source + *----------------- + */ |