708 lines
17 KiB
C
708 lines
17 KiB
C
#include <windows.h>
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#include <windowsx.h>
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#include <win32.h>
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#include "lockbm.h"
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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#ifndef BI_BITFIELDS
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#define BI_BITFIELDS 3
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#endif
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#ifndef BI_BITMAP
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#define BI_BITMAP 0x4D544942 // 'BITM'
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#endif
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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//
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// GDI!GDIInit2() GDI.403
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//
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// this GDI function does the following:
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//
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// GetSetBitmapHandle(hbm, 0) - will return global handle of bitmap
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//
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// GetSetBitmapHandle(hbm, h) - will set global handle to <h>
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//
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// GetSetBitmapHandle(hbm, -1) - will set global handle to NULL
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//
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static HANDLE (FAR PASCAL *GetSetBitmapHandle)(HBITMAP hbm, HANDLE h);
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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#define muldiv(a,b,c) (UINT)(((DWORD)(UINT)(a) * (DWORD)(UINT)(b)) / (UINT)(c))
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//////////////////////////////////////////////////////////////////////////////
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//
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// CanLockBitmaps()
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//
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// determime if we can lock bitmaps on the current display device
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//
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//////////////////////////////////////////////////////////////////////////////
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BOOL FAR CanLockBitmaps(void)
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{
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#ifndef WIN32
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//its not safe to do this on NT. god only knows what gdi.403 is on future
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//nt platforms - the only thing we can be sure of is that it is NOT
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// GetSetBitmapHandle()
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UINT w;
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UINT rc;
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HDC hdc;
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BOOL f;
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static BOOL fCanLockBitmaps = -1;
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if (fCanLockBitmaps == -1)
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{
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w = (UINT)GetVersion();
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w = ((UINT)LOBYTE(w) << 8) | HIBYTE(w);
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hdc = GetDC(NULL);
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rc = GetDeviceCaps(hdc, RASTERCAPS);
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ReleaseDC(NULL, hdc);
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(FARPROC)GetSetBitmapHandle =
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GetProcAddress(GetModuleHandle(TEXT("GDI")),(LPCSTR)MAKEINTATOM(403));
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#ifdef WIN32
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// MAKEINTATOM returns a LPTSTR.
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// GetProcAddress wants LPCSTR - NOT Unicode. Hence we cast
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#endif
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//
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// assume we dont need this on windows 4.0?
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//
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// what about the DIBENG? it does DEVBITS and in win 4.0?
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//
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// if the display handles device bitmaps, dont do this either
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//
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f = GetProfileIntA("DrawDib", "Bitmaps", TRUE);
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#ifdef DEBUG
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fCanLockBitmaps = f && GetSetBitmapHandle != NULL;
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#else
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fCanLockBitmaps = f && /* (w < 0x0400) && */
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!(rc & RC_DEVBITS) &&
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GetSetBitmapHandle != NULL;
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#endif
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}
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return fCanLockBitmaps;
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#else
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return FALSE;
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#endif
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// LockBitmap
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//
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// return a pointer to the bitmap bits
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//
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//////////////////////////////////////////////////////////////////////////////
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LPVOID FAR LockBitmap(HBITMAP hbm)
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{
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return GetBitmap(hbm, NULL, 0);
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// GetBitmapDIB
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//
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//////////////////////////////////////////////////////////////////////////////
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LPVOID FAR GetBitmapDIB(LPBITMAPINFOHEADER lpbi, LPVOID lpBits, LPVOID p, int cb)
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{
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IBITMAP FAR *pbm;
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if (lpBits == NULL)
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lpBits = (LPBYTE)lpbi + (int)lpbi->biSize + lpbi->biClrUsed * sizeof(RGBQUAD);
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if (p == NULL || cb < sizeof(BITMAP))
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return lpBits;
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pbm = p;
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if (lpbi->biCompression == 0)
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{
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switch ((int)lpbi->biBitCount + (int)lpbi->biPlanes*256)
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{
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case 0x0101: pbm->bmType = BM_1BIT; break;
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case 0x0104: pbm->bmType = BM_4BIT; break;
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case 0x0108: pbm->bmType = BM_8BIT; break;
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case 0x0110: pbm->bmType = BM_16555; break;
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case 0x0118: pbm->bmType = BM_24BGR; break;
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case 0x0120: pbm->bmType = BM_32BGR; break;
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case 0x0401: pbm->bmType = BM_VGA; break;
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default: return NULL;
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}
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}
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else if (lpbi->biCompression == BI_BITFIELDS)
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{
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switch ((int)lpbi->biBitCount + (int)lpbi->biPlanes*256)
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{
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//!!! hack: realy should check the bit fields!
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case 0x0110: pbm->bmType = BM_16565; break;
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case 0x0118: pbm->bmType = BM_24RGB; break;
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case 0x0120: pbm->bmType = BM_32RGB; break;
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default: return NULL;
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}
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}
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else
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return NULL;
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pbm->bmWidth = (int)lpbi->biWidth;
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pbm->bmHeight = ((int)lpbi->biHeight > 0) ? (int)lpbi->biHeight : -(int)lpbi->biHeight;
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pbm->bmWidthBytes = (((int)lpbi->biBitCount * (int)lpbi->biWidth + 31)&~31)/8;
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pbm->bmPlanes = (BYTE)lpbi->biPlanes;
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pbm->bmBitsPixel = (BYTE)lpbi->biBitCount;
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pbm->bmBits = lpBits;
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if (cb > sizeof(BITMAP))
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{
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pbm->bmSegmentIndex = 0;
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pbm->bmScanSegment = pbm->bmHeight;
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pbm->bmFillBytes = 0;
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pbm->bmBitmapInfo = (long)lpbi;
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if ((long)lpbi->biHeight < 0)
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{
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pbm->bmNextScan = -pbm->bmWidthBytes;
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pbm->bmOffset = (long)pbm->bmWidthBytes * (pbm->bmHeight-1);
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}
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else
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{
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pbm->bmNextScan = pbm->bmWidthBytes;
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pbm->bmOffset = 0;
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}
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}
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return lpBits;
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}
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#if 0
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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void FAR BitmapXY(IBITMAP FAR *pbm, int x, int y)
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{
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UINT t;
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if (pbm->bmFillBytes)
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{
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while (y-- > 0)
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{
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t = (UINT)(pbm->bmOffset & 0xFFFF0000);
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pbm->bmOffset += pbm->bmNextScan;
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if ((UINT)(pbm->bmOffset & 0xFFFF0000) != t)
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pbm->bmOffset += pbm->bmFillBytes;
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}
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}
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else
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{
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pbm->bmOffset += y * (long)pbm->bmNextScan;
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}
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pbm->bmOffset += x * pbm->bmBitsPixel / 8;
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}
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#endif
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//////////////////////////////////////////////////////////////////////////////
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//
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// GetDIBBitmap
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//
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//////////////////////////////////////////////////////////////////////////////
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/*
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* creates a DIB header for a bitmap, and returns a pointer to the bitmap
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* bits. This pointer is not used - it's checked against NULL, as if this
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* routine returned BOOL.
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*
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* On NT, you can't get the bitmap bits (wrong process) so we return 1 meaning
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* TRUE. You need to call SetBitmapBits to access the bits themselves.
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*/
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LPVOID FAR GetDIBBitmap(HBITMAP hbm, LPBITMAPINFOHEADER lpbi)
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{
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UINT wType;
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BITMAP bm;
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UINT ScansPerSeg;
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UINT FillBytes;
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if (hbm)
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GetObject(hbm, sizeof(bm), &bm);
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wType = GetBitmapType();
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if (wType == 0)
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return NULL;
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lpbi->biSize = sizeof(BITMAPINFOHEADER);
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lpbi->biWidth = bm.bmWidth;
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lpbi->biHeight = bm.bmHeight;
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lpbi->biPlanes = bm.bmPlanes;
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lpbi->biBitCount = bm.bmBitsPixel;
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lpbi->biCompression = 0;
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lpbi->biSizeImage = (DWORD)(bm.bmWidthBytes * bm.bmPlanes) * (DWORD)bm.bmHeight;
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lpbi->biXPelsPerMeter = 0;
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lpbi->biYPelsPerMeter = 0;
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lpbi->biClrUsed = 0;
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lpbi->biClrImportant = 0;
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switch(wType & BM_TYPE)
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{
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case BM_VGA:
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break;
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case BM_1BIT:
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case BM_4BIT:
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case BM_8BIT:
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break;
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case BM_16555:
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break;
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case BM_24BGR:
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case BM_32BGR:
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break;
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case BM_16565:
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lpbi->biCompression = BI_BITFIELDS;
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((LPDWORD)(lpbi+1))[0] = 0x00F800;
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((LPDWORD)(lpbi+1))[1] = 0x0007E0;
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((LPDWORD)(lpbi+1))[2] = 0x00001F;
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break;
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case BM_24RGB:
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case BM_32RGB:
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lpbi->biCompression = BI_BITFIELDS;
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((LPDWORD)(lpbi+1))[0] = 0x0000FF;
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((LPDWORD)(lpbi+1))[1] = 0x00FF00;
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((LPDWORD)(lpbi+1))[2] = 0xFF0000;
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break;
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default:
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return NULL;
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}
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//
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// make sure WidthBytes is right, dont forget bitmaps are WORD aligned
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// and DIBs are DWORD aligned.
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//
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if (bm.bmWidthBytes != ((bm.bmWidth * bm.bmBitsPixel + 31) & ~31)/8)
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{
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if (lpbi->biCompression != 0)
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return NULL;
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lpbi->biCompression = BI_BITMAP;
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lpbi->biXPelsPerMeter = bm.bmWidthBytes;
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}
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if ((wType & BM_HUGE) && (lpbi->biSizeImage > 64*1024l))
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{
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if (lpbi->biCompression == BI_BITFIELDS)
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return NULL;
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lpbi->biCompression = BI_BITMAP;
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ScansPerSeg = muldiv(64,1024,bm.bmWidthBytes * bm.bmPlanes);
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FillBytes = (UINT)(64ul*1024 - bm.bmWidthBytes * bm.bmPlanes * ScansPerSeg);
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lpbi->biSizeImage += FillBytes * (bm.bmHeight / ScansPerSeg);
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lpbi->biXPelsPerMeter = bm.bmWidthBytes;
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lpbi->biYPelsPerMeter = FillBytes;
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}
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if (!(wType & BM_BOTTOMTOTOP))
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lpbi->biHeight = -bm.bmHeight;
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#ifdef WIN32
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return (LPVOID) TRUE;
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#else
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return LockBitmap(hbm);
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#endif
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// GetBitmap
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//
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//////////////////////////////////////////////////////////////////////////////
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LPVOID FAR GetBitmap(HBITMAP hbm, LPVOID p, int cb)
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{
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HANDLE h;
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DWORD dwSize;
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IBITMAP FAR *pbm;
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HDC hdc = NULL;
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HBITMAP hbmT;
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if (!CanLockBitmaps())
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return NULL;
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if (hbm == NULL)
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return NULL;
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h = GetSetBitmapHandle(hbm, 0);
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if (h == NULL)
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return NULL;
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pbm = (LPVOID)GlobalLock(h);
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if (IsBadReadPtr(pbm, sizeof(IBITMAP)))
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return NULL;
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//
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// see if it is realy a bitmap.
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//
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if (pbm->bmType != 0)
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return NULL;
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//
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// make sure the bmBits pointer is valid.
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//
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if (pbm->bmBits == NULL)
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{
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hdc = CreateCompatibleDC(NULL);
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hbmT = SelectObject(hdc, hbm);
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}
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dwSize = (DWORD)pbm->bmHeight * (DWORD)pbm->bmWidthBytes;
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if (IsBadHugeWritePtr((LPVOID)pbm->bmBits, dwSize))
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{
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if (hdc)
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{
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SelectObject(hdc, hbmT);
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DeleteDC(hdc);
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}
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return NULL;
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}
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if (p)
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{
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UINT u;
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hmemcpy(p, pbm, min(cb, sizeof(IBITMAP)));
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pbm = p;
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u = GetBitmapType();
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pbm->bmType = u & BM_TYPE;
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if (cb > sizeof(BITMAP))
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{
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pbm->bmBitmapInfo = 0;
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pbm->bmNextScan = pbm->bmWidthBytes * pbm->bmPlanes;
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if (u & BM_BOTTOMTOTOP)
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{
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pbm->bmOffset = 0;
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}
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else
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{
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pbm->bmOffset = (long)pbm->bmNextScan * (pbm->bmHeight-1);
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pbm->bmNextScan = -pbm->bmNextScan;
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pbm->bmFillBytes = -pbm->bmFillBytes;
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}
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//
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// see if this particular bitmap is HUGE
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//
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if (!(u & BM_HUGE) || (DWORD)pbm->bmHeight * pbm->bmWidthBytes < 64l*1024)
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{
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pbm->bmFillBytes = 0;
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pbm->bmScanSegment = pbm->bmHeight;
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}
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else
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{
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if (pbm->bmOffset)
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pbm->bmOffset -= (long)((pbm->bmHeight-1) / pbm->bmScanSegment) * pbm->bmFillBytes;
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}
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}
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}
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if (hdc)
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{
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SelectObject(hdc, hbmT);
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DeleteDC(hdc);
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}
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return (LPVOID)pbm->bmBits;
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}
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/////////////////////////////////////////////////////////////////////////////
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//
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// SetPixel
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//
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// some cards cant't seam to do SetPixel right it is amazing they work at all
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//
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/////////////////////////////////////////////////////////////////////////////
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static void SetPixelX(HDC hdc, int x, int y, COLORREF rgb)
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{
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RECT rc;
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rc.left = x;
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rc.top = y;
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rc.right = x+1;
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rc.bottom = y+1;
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SetBkColor(hdc, rgb);
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ExtTextOut(hdc, 0, 0, ETO_OPAQUE, &rc, NULL, 0, NULL);
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}
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#define SetPixel SetPixelX
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///////////////////////////////////////////////////////////////////////////////
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//
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// GetSurfaceType
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//
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///////////////////////////////////////////////////////////////////////////////
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#define BCODE _based(_segname("_CODE"))
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static BYTE BCODE bits8[] = {0x00,0xF9,0xFA,0xFC,0xFF};
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static WORD BCODE bits555[] = {0x0000,0x7C00,0x03E0,0x001F,0x7FFF};
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static WORD BCODE bits5551[]= {0x8000,0xFC00,0x83E0,0x801F,0xFFFF};
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static WORD BCODE bits565[] = {0x0000,0xF800,0x07E0,0x001F,0xFFFF};
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static BYTE BCODE bitsBGR[] = {0x00,0x00,0x00, 0x00,0x00,0xFF, 0x00,0xFF,0x00, 0xFF,0x00,0x00, 0xFF,0xFF,0xFF};
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static BYTE BCODE bitsRGB[] = {0x00,0x00,0x00, 0xFF,0x00,0x00, 0x00,0xFF,0x00, 0x00,0x00,0xFF, 0xFF,0xFF,0xFF};
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static DWORD BCODE bitsRGBX[]= {0x000000, 0x0000FF, 0x00FF00, 0xFF0000, 0xFFFFFF};
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static DWORD BCODE bitsBGRX[]= {0x000000, 0xFF0000, 0x00FF00, 0x0000FF, 0xFFFFFF};
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void FAR TestSurfaceType(HDC hdc, int x, int y)
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{
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PatBlt(hdc, x, y, 5, 1, BLACKNESS);
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SetPixel(hdc, x+0, y, RGB(000,000,000));
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SetPixel(hdc, x+1, y, RGB(255,000,000));
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SetPixel(hdc, x+2, y, RGB(000,255,000));
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SetPixel(hdc, x+3, y, RGB(000,000,255));
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SetPixel(hdc, x+4, y, RGB(255,255,255));
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GetPixel(hdc, x, y);
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}
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UINT FAR GetSurfaceType(LPVOID lpBits)
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{
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#define TESTFMT(a,n) \
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if (_fmemcmp(lpBits, (LPVOID)a, sizeof(a)) == 0) return n;
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TESTFMT(bits8, BM_8BIT);
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TESTFMT(bits555, BM_16555);
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TESTFMT(bits5551, BM_16555);
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TESTFMT(bits565, BM_16565);
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TESTFMT(bitsRGB, BM_24RGB);
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TESTFMT(bitsBGR, BM_24BGR);
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TESTFMT(bitsRGBX, BM_32RGB);
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TESTFMT(bitsBGRX, BM_32BGR);
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return 0;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// GetBitmapType
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//
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// return the bitmap type that the display driver uses
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//
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///////////////////////////////////////////////////////////////////////////////
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UINT FAR GetBitmapType()
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{
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BITMAP bm;
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HBITMAP hbm;
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HBITMAP hbmT;
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HDC hdc;
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UINT u;
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BYTE bits[20*4*2];
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static UINT wBitmapType = 0xFFFF;
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if (wBitmapType != 0xFFFF)
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return wBitmapType;
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//
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// create a test bitmap (<64k)
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//
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hdc = GetDC(NULL);
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if (hdc == NULL) {
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return 0;
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}
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hbm = CreateCompatibleBitmap(hdc,20,2);
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ReleaseDC(NULL, hdc);
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if (hbm == NULL) {
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return 0;
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}
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hdc = CreateCompatibleDC(NULL);
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|
if (hdc == NULL) {
|
|
DeleteObject(hbm);
|
|
return 0;
|
|
}
|
|
|
|
hbmT = SelectObject(hdc, hbm);
|
|
|
|
if (GetObject(hbm, sizeof(bm), &bm) == 0) {
|
|
SelectObject(hdc, hbmT);
|
|
DeleteObject(hbm);
|
|
DeleteDC(hdc);
|
|
return 0;
|
|
}
|
|
|
|
PatBlt(hdc, 0, 0, bm.bmWidth, bm.bmHeight, BLACKNESS);
|
|
|
|
TestSurfaceType(hdc, 0, 0);
|
|
GetBitmapBits(hbm, sizeof(bits), bits);
|
|
u = GetSurfaceType(bits);
|
|
|
|
if (u == 0) {
|
|
u = GetSurfaceType(bits + bm.bmWidthBytes);
|
|
|
|
if (u)
|
|
u |= BM_BOTTOMTOTOP;
|
|
}
|
|
|
|
#ifndef WIN32
|
|
if (u) {
|
|
BYTE _huge *pb;
|
|
UINT dy,w;
|
|
|
|
//
|
|
// see if bitmap(s) are huge format
|
|
//
|
|
dy = (UINT)(0x10000l/bm.bmWidthBytes) + 1;
|
|
hbm = CreateCompatibleBitmap(hdc,bm.bmWidth,dy);
|
|
DeleteObject(SelectObject(hdc, hbm));
|
|
PatBlt(hdc, 0, 0, bm.bmWidth, dy, BLACKNESS);
|
|
|
|
pb = (BYTE _huge *)LockBitmap(hbm);
|
|
|
|
if (pb == NULL || OFFSETOF(pb) != 0)
|
|
; // cant lock bitmaps
|
|
else {
|
|
u |= BM_CANLOCK;
|
|
|
|
w = (dy-1) * bm.bmWidthBytes;
|
|
|
|
pb[64l*1024] = 0;
|
|
pb[w] = 0;
|
|
|
|
if (u & BM_BOTTOMTOTOP)
|
|
SetPixel(hdc, 0, 0, RGB(255,255,255));
|
|
else
|
|
SetPixel(hdc, 0, dy-1, RGB(255,255,255));
|
|
|
|
if (pb[64l*1024] != 0 && pb[w] == 0)
|
|
u |= BM_HUGE;
|
|
else if (pb[64l*1024] == 0 && pb[w] != 0)
|
|
;
|
|
else
|
|
u = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
SelectObject(hdc, hbmT);
|
|
DeleteObject(hbm);
|
|
DeleteDC(hdc);
|
|
|
|
wBitmapType = u;
|
|
return u;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// returns the PDevice of the given physical or memory DC
|
|
//
|
|
// return the bitmap type that the display driver uses
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
LPVOID FAR GetPDevice(HDC hdc)
|
|
{
|
|
HANDLE h;
|
|
HBITMAP hbm;
|
|
HBITMAP hbmT;
|
|
HDC hdcT=NULL;
|
|
IBITMAP FAR *pbm;
|
|
LPVOID lpPDevice = NULL;
|
|
|
|
// GDI.403
|
|
static HANDLE (FAR PASCAL *GdiGetBitmapHandle)(HBITMAP hbm, HANDLE h);
|
|
|
|
if (GdiGetBitmapHandle == NULL)
|
|
(FARPROC)GdiGetBitmapHandle = GetProcAddress(GetModuleHandle(TEXT("GDI")),(LPCSTR)MAKEINTATOM(403));
|
|
|
|
if (GdiGetBitmapHandle == NULL)
|
|
return NULL;
|
|
|
|
hbm = CreateBitmap(1,1,1,1,NULL);
|
|
|
|
//
|
|
// first try the passed DC if it is a bitmap/DC
|
|
//
|
|
hbmT = SelectBitmap(hdc, hbm);
|
|
|
|
if (hbmT != NULL)
|
|
{
|
|
//
|
|
// it is a memory DC.
|
|
//
|
|
h = GdiGetBitmapHandle(hbmT, 0);
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// it is a physical DC.
|
|
//
|
|
|
|
hdcT = CreateCompatibleDC(hdc);
|
|
hbmT = SelectBitmap(hdcT, hbm);
|
|
|
|
h = GdiGetBitmapHandle(hbm, 0);
|
|
}
|
|
|
|
if (h == NULL)
|
|
goto exit;
|
|
|
|
pbm = (IBITMAP FAR *)GlobalLock(h);
|
|
|
|
if (IsBadReadPtr(pbm, sizeof(IBITMAP)))
|
|
goto exit;
|
|
|
|
if (pbm)
|
|
pbm = (IBITMAP FAR *)pbm->bmlpPDevice;
|
|
else
|
|
pbm = NULL;
|
|
|
|
if (IsBadReadPtr(pbm, 2))
|
|
goto exit;
|
|
|
|
lpPDevice = (LPVOID)pbm;
|
|
|
|
exit:
|
|
if (hdcT)
|
|
{
|
|
SelectObject(hdcT, hbmT);
|
|
DeleteObject(hdcT);
|
|
}
|
|
else
|
|
{
|
|
SelectObject(hdc, hbmT);
|
|
}
|
|
|
|
DeleteObject(hbm);
|
|
|
|
return lpPDevice;
|
|
}
|