78 lines
1.5 KiB
C++
78 lines
1.5 KiB
C++
/*++
|
|
|
|
Copyright (c) 1999 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
TonkaConstruction.cpp
|
|
|
|
Abstract:
|
|
|
|
Workaround for GDI behavior difference when bltting palettized bitmaps. On
|
|
Win9x GDI first looked at the current index for a color match when building
|
|
a lookup table, but on NT, it simply searches from the beginning. This
|
|
breaks palette animation. The fix is to make sure that the entries that are
|
|
animated are different from all the others.
|
|
|
|
Notes:
|
|
|
|
This is an app specific shim.
|
|
|
|
History:
|
|
|
|
12/02/2001 linstev Created
|
|
|
|
--*/
|
|
|
|
#include "precomp.h"
|
|
|
|
IMPLEMENT_SHIM_BEGIN(TonkaConstruction)
|
|
#include "ShimHookMacro.h"
|
|
|
|
APIHOOK_ENUM_BEGIN
|
|
APIHOOK_ENUM_ENTRY(CreatePalette)
|
|
APIHOOK_ENUM_END
|
|
|
|
/*++
|
|
|
|
Make sure index 10->15 are different from all other entries.
|
|
|
|
--*/
|
|
|
|
HPALETTE
|
|
APIHOOK(CreatePalette)(
|
|
CONST LOGPALETTE *lplgpl
|
|
)
|
|
{
|
|
Restart:
|
|
for (int i=10; i<=15; i++) {
|
|
LPDWORD p1 = (DWORD *)&lplgpl->palPalEntry[i];
|
|
for (int j=16; j<=255; j++) {
|
|
LPDWORD p2 = (DWORD *)&lplgpl->palPalEntry[j];
|
|
|
|
if (*p1 == *p2) {
|
|
//
|
|
// Entry is the same, so make it different
|
|
//
|
|
*p1 = *p1-1;
|
|
goto Restart;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ORIGINAL_API(CreatePalette)(lplgpl);
|
|
}
|
|
|
|
/*++
|
|
|
|
Register hooked functions
|
|
|
|
--*/
|
|
|
|
HOOK_BEGIN
|
|
APIHOOK_ENTRY(GDI32.DLL, CreatePalette)
|
|
HOOK_END
|
|
|
|
IMPLEMENT_SHIM_END
|
|
|