95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
/*++
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*
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* WOW v1.0
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*
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* Copyright (c) 1991, Microsoft Corporation
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*
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* WGPAL.C
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* WOW32 16-bit GDI API support
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*
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* History:
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* 07-Mar-1991 Jeff Parsons (jeffpar)
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* Created.
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*
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* 09-Apr-1991 NigelT
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* Various defines are used here to remove calls to Win32
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* features which don't work yet.
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--*/
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#include "precomp.h"
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#pragma hdrstop
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MODNAME(wgpal.c);
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ULONG FASTCALL WG32GetSystemPaletteEntries(PVDMFRAME pFrame)
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{
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ULONG ul = 0L;
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PPALETTEENTRY ppal;
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register PGETSYSTEMPALETTEENTRIES16 parg16;
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GETARGPTR(pFrame, sizeof(GETSYSTEMPALETTEENTRIES16), parg16);
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GETVDMPTR(parg16->f4, parg16->f3 * sizeof(PALETTEENTRY), ppal);
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if( ppal ) {
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ul = GETWORD16(GetSystemPaletteEntries(HDC32(parg16->f1),
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WORD32(parg16->f2),
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WORD32(parg16->f3),
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ppal));
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// if we fail but are on a rgb device, fill in the default 256 entries.
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// WIN31 just calls Escape(hdc,GETCOLORTABLE) which on NT just calls
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// GetSysteemPaletteEntries().
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if (!ul && (GetDeviceCaps(HDC32(parg16->f1),BITSPIXEL) > 8))
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{
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if (parg16->f4 == 0)
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{
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ul = 256;
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}
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else
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{
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int j;
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int i = WORD32(parg16->f2);
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int c = WORD32(parg16->f3);
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if ((c + i) > 256)
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c = 256 - i;
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if (c > 0)
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{
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BYTE abGreenRed[8] = {0x0,0x25,0x48,0x6d,0x92,0xb6,0xdb,0xff};
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BYTE abBlue[4] = {0x0,0x55,0xaa,0xff};
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// green mask 00000111
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// red mask 00111000
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// blue mask 11000000
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// could certainly do this faster with a table and mem copy
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// but I don't really care about performance here. Apps
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// shouldn't be doing this. That is why it is in the wow
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// layer.
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for (j = 0; j < c; ++j,++i)
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{
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ppal[j].peGreen = abGreenRed[i & 0x07];
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ppal[j].peRed = abGreenRed[(i >> 3) & 0x07];
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ppal[j].peBlue = abBlue[(i >> 6) & 0x03];
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ppal[j].peFlags = 0;
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}
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ul = c;
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}
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}
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}
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FREEVDMPTR(ppal);
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}
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FREEARGPTR(parg16);
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RETURN(ul);
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}
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