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146 lines
3.7 KiB
146 lines
3.7 KiB
#include "ctlspriv.h"
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// these are the default colors used to map the dib colors
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// to the current system colors
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#define RGB_BUTTONTEXT (RGB(000,000,000)) // black
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#define RGB_BUTTONSHADOW (RGB(128,128,128)) // dark grey
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#define RGB_BUTTONFACE (RGB(192,192,192)) // bright grey
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#define RGB_BUTTONHILIGHT (RGB(255,255,255)) // white
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#define RGB_BACKGROUNDSEL (RGB(000,000,255)) // blue
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#define RGB_BACKGROUND (RGB(255,000,255)) // magenta
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#define FlipColor(rgb) (RGB(GetBValue(rgb), GetGValue(rgb), GetRValue(rgb)))
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#define MAX_COLOR_MAPS 16
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HBITMAP WINAPI CreateMappedBitmap(HINSTANCE hInstance, int idBitmap,
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BOOL bDiscardable, LPCOLORMAP lpColorMap, int iNumMaps)
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{
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HDC hdc;
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HANDLE h;
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DWORD *p;
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LPBYTE lpBits;
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HANDLE hRes;
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LPBITMAPINFOHEADER lpBitmapInfo;
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HBITMAP hbm;
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int numcolors, i;
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int wid, hgt;
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DWORD dwSize;
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static const COLORMAP SysColorMap[] = {
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{RGB_BUTTONTEXT, COLOR_BTNTEXT}, // black
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{RGB_BUTTONSHADOW, COLOR_BTNSHADOW}, // dark grey
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{RGB_BUTTONFACE, COLOR_BTNFACE}, // bright grey
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{RGB_BUTTONHILIGHT, COLOR_BTNHIGHLIGHT},// white
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{RGB_BACKGROUNDSEL, COLOR_HIGHLIGHT}, // blue
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{RGB_BACKGROUND, COLOR_WINDOW} // magenta
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};
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LPVOID lpResource;
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#define NUM_DEFAULT_MAPS (sizeof(SysColorMap) / sizeof(COLORMAP))
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COLORMAP DefaultColorMap[NUM_DEFAULT_MAPS];
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COLORMAP DIBColorMap[MAX_COLOR_MAPS];
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h = FindResource(hInstance, (LPTSTR) MAKEINTRESOURCE(idBitmap), RT_BITMAP);
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if (!h)
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return NULL;
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hRes = LoadResource(hInstance, h);
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//
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// Lock the bitmap and get a pointer to the color table.
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//
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dwSize = SizeofResource(hInstance, h);
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if (!dwSize)
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return NULL;
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lpResource = (LPVOID) hRes;
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if (!lpResource)
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return NULL;
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lpBitmapInfo = (LPBITMAPINFOHEADER) LocalAlloc(LMEM_FIXED, dwSize);
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if (!lpBitmapInfo)
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return NULL;
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CopyMemory((LPBYTE)lpBitmapInfo,(LPBYTE)lpResource, dwSize);
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//
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// Get system colors for the default color map
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//
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if (!lpColorMap) {
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lpColorMap = DefaultColorMap;
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iNumMaps = NUM_DEFAULT_MAPS;
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for (i = 0; i < iNumMaps; i++) {
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lpColorMap[i].from = SysColorMap[i].from;
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lpColorMap[i].to = GetSysColor((int)SysColorMap[i].to);
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}
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}
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//
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// Transform RGB color map to a BGR DIB format color map
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//
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if (iNumMaps > MAX_COLOR_MAPS)
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iNumMaps = MAX_COLOR_MAPS;
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for (i = 0; i < iNumMaps; i++) {
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DIBColorMap[i].to = FlipColor(lpColorMap[i].to);
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DIBColorMap[i].from = FlipColor(lpColorMap[i].from);
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}
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p = (DWORD FAR *)((LPBYTE)(lpBitmapInfo) + lpBitmapInfo->biSize);
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//
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// Replace button-face and button-shadow colors with the current values
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//
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numcolors = 16;
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while (numcolors-- > 0) {
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for (i = 0; i < iNumMaps; i++) {
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if (*p == DIBColorMap[i].from) {
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*p = DIBColorMap[i].to;
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break;
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}
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}
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p++;
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}
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//
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// First skip over the header structure
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//
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lpBits = (LPBYTE)(lpBitmapInfo + 1);
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//
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// Skip the color table entries, if any
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//
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lpBits += (1 << (lpBitmapInfo->biBitCount)) * sizeof(RGBQUAD);
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//
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// Create a color bitmap compatible with the display device
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//
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wid = (int)lpBitmapInfo->biWidth;
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hgt = (int)lpBitmapInfo->biHeight;
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hdc = GetDC(NULL);
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if (bDiscardable)
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hbm = CreateDiscardableBitmap(hdc, wid, hgt);
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else
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hbm = CreateCompatibleBitmap(hdc, wid, hgt);
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if (hbm)
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SetDIBits(hdc, hbm, 0, hgt, lpBits, (LPBITMAPINFO)lpBitmapInfo, DIB_RGB_COLORS);
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ReleaseDC(NULL, hdc);
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LocalFree((HLOCAL)lpBitmapInfo);
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return hbm;
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}
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