projects / wxWidgets.git / blame
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1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: dibutils.h | |
| 3 | // Purpose: Utilities for DIBs | |
| 4 | // Author: Julian Smart | |
| 5 | // Modified by: | |
| 6 | // Created: 04/01/98 | |
| 7 | // RCS-ID: $Id$ | |
| 8 | // Copyright: (c) Microsoft, Julian Smart | |
| 9 | // Licence: wxWindows license | |
| 10 | ///////////////////////////////////////////////////////////////////////////// | |
| 11 | ||
| 12 | /*************************************************************************** | |
| 13 | ||
| 14 | (C) Copyright 1994 Microsoft Corp. All rights reserved. | |
| 15 | ||
| 16 | You have a royalty-free right to use, modify, reproduce and | |
| 17 | distribute the Sample Files (and/or any modified version) in | |
| 18 | any way you find useful, provided that you agree that | |
| 19 | Microsoft has no warranty obligations or liability for any | |
| 20 | Sample Application Files which are modified. | |
| 21 | ||
| 22 | **************************************************************************/ | |
| 23 | ||
| 24 | /*************************************************************************** | |
| 25 | Functions for handling Device Independent Bitmaps and clearing the | |
| 26 | System Palette. | |
| 27 | **************************************************************************/ | |
| 28 | ||
| 29 | #ifndef SAMPLES_UTILS_H | |
| 30 | #define SAMPLES_UTILS_H | |
| 31 | ||
| 32 | #ifdef __GNUG__ | |
| 33 | #pragma interface "dibutils.h" | |
| 34 | #endif | |
| 35 | ||
| 36 | typedef LPBITMAPINFOHEADER PDIB; | |
| 37 | typedef HANDLE HDIB; | |
| 38 | ||
| 39 | /*************************************************************************** | |
| 40 | External function declarations | |
| 41 | **************************************************************************/ | |
| 42 | ||
| 43 | void ClearSystemPalette(void); | |
| 44 | PDIB DibOpenFile(LPSTR szFile); | |
| 45 | int DibWriteFile(LPSTR szFile, LPBITMAPINFOHEADER lpbi); | |
| 46 | BOOL DibSetUsage(PDIB pdib, HPALETTE hpal,UINT wUsage); | |
| 47 | PDIB DibCreate(int bits, int dx, int dy); | |
| 48 | BOOL DibMapToPalette(PDIB pdib, HPALETTE hpal); | |
| 49 | HPALETTE MakePalette(const BITMAPINFO FAR* Info, UINT flags); | |
| 50 | ||
| 51 | /**************************************************************************** | |
| 52 | Internal function declarations | |
| 53 | ***************************************************************************/ | |
| 54 | ||
| 55 | PDIB DibReadBitmapInfo(HFILE fh); | |
| 56 | ||
| 57 | /**************************************************************************** | |
| 58 | DIB macros. | |
| 59 | ***************************************************************************/ | |
| 60 | ||
| 61 | #ifdef WIN32 | |
| 62 | #define HandleFromDib(lpbi) GlobalHandle(lpbi) | |
| 63 | #else | |
| 64 | #define HandleFromDib(lpbi) (HANDLE)GlobalHandle(SELECTOROF(lpbi)) | |
| 65 | #endif | |
| 66 | ||
| 67 | #define DibFromHandle(h) (PDIB)GlobalLock(h) | |
| 68 | ||
| 69 | #define DibFree(pdib) GlobalFreePtr(pdib) | |
| 70 | ||
| 71 | #define WIDTHBYTES(i) ((unsigned)((i+31)&(~31))/8) /* ULONG aligned ! */ | |
| 72 | ||
| 73 | #define DibWidth(lpbi) (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biWidth) | |
| 74 | #define DibHeight(lpbi) (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biHeight) | |
| 75 | #define DibBitCount(lpbi) (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biBitCount) | |
| 76 | #define DibCompression(lpbi) (DWORD)(((LPBITMAPINFOHEADER)(lpbi))->biCompression) | |
| 77 | ||
| 78 | #define DibWidthBytesN(lpbi, n) (UINT)WIDTHBYTES((UINT)(lpbi)->biWidth * (UINT)(n)) | |
| 79 | #define DibWidthBytes(lpbi) DibWidthBytesN(lpbi, (lpbi)->biBitCount) | |
| 80 | ||
| 81 | #define DibSizeImage(lpbi) ((lpbi)->biSizeImage == 0 \ | |
| 82 | ? ((DWORD)(UINT)DibWidthBytes(lpbi) * (DWORD)(UINT)(lpbi)->biHeight) \ | |
| 83 | : (lpbi)->biSizeImage) | |
| 84 | ||
| 85 | #define DibSize(lpbi) ((lpbi)->biSize + (lpbi)->biSizeImage + (int)(lpbi)->biClrUsed * sizeof(RGBQUAD)) | |
| 86 | #define DibPaletteSize(lpbi) (DibNumColors(lpbi) * sizeof(RGBQUAD)) | |
| 87 | ||
| 88 | #define DibFlipY(lpbi, y) ((int)(lpbi)->biHeight-1-(y)) | |
| 89 | ||
| 90 | //HACK for NT BI_BITFIELDS DIBs | |
| 91 | #ifdef WIN32 | |
| 92 | #define DibPtr(lpbi) ((lpbi)->biCompression == BI_BITFIELDS \ | |
| 93 | ? (LPVOID)(DibColors(lpbi) + 3) \ | |
| 94 | : (LPVOID)(DibColors(lpbi) + (UINT)(lpbi)->biClrUsed)) | |
| 95 | #else | |
| 96 | #define DibPtr(lpbi) (LPVOID)(DibColors(lpbi) + (UINT)(lpbi)->biClrUsed) | |
| 97 | #endif | |
| 98 | ||
| 99 | #define DibColors(lpbi) ((RGBQUAD FAR *)((LPBYTE)(lpbi) + (int)(lpbi)->biSize)) | |
| 100 | ||
| 101 | #define DibNumColors(lpbi) ((lpbi)->biClrUsed == 0 && (lpbi)->biBitCount <= 8 \ | |
| 102 | ? (int)(1 << (int)(lpbi)->biBitCount) \ | |
| 103 | : (int)(lpbi)->biClrUsed) | |
| 104 | ||
| 105 | #define DibXYN(lpbi,pb,x,y,n) (LPVOID)( \ | |
| 106 | (BYTE _huge *)(pb) + \ | |
| 107 | (UINT)((UINT)(x) * (UINT)(n) / 8u) + \ | |
| 108 | ((DWORD)DibWidthBytesN(lpbi,n) * (DWORD)(UINT)(y))) | |
| 109 | ||
| 110 | #define DibXY(lpbi,x,y) DibXYN(lpbi,DibPtr(lpbi),x,y,(lpbi)->biBitCount) | |
| 111 | ||
| 112 | #define FixBitmapInfo(lpbi) if ((lpbi)->biSizeImage == 0) \ | |
| 113 | (lpbi)->biSizeImage = DibSizeImage(lpbi); \ | |
| 114 | if ((lpbi)->biClrUsed == 0) \ | |
| 115 | (lpbi)->biClrUsed = DibNumColors(lpbi); \ | |
| 116 | if ((lpbi)->biCompression == BI_BITFIELDS && (lpbi)->biClrUsed == 0) \ | |
| 117 | ; // (lpbi)->biClrUsed = 3; | |
| 118 | ||
| 119 | #define DibInfo(pDIB) ((BITMAPINFO FAR *)(pDIB)) | |
| 120 | ||
| 121 | /***************************************************************************/ | |
| 122 | ||
| 123 | #ifndef BI_BITFIELDS | |
| 124 | #define BI_BITFIELDS 3 | |
| 125 | #endif | |
| 126 | ||
| 127 | #ifndef HALFTONE | |
| 128 | #define HALFTONE COLORONCOLOR | |
| 129 | #endif | |
| 130 | ||
| 131 | #endif |