//-----------------------------------------------------------------------------
// File: ddutil.cpp
//
// Desc: Routines for loading bitmap and palettes from resources
//
//
// Copyright (c) 1995-1999 Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
#define STRICT
#include <windows.h>
#include <windowsx.h>
#include <ddraw.h>
#include "ddutil.h"
//-----------------------------------------------------------------------------
// Name: DDUtil_LoadBitmap()
// Desc: Create a DirectDrawSurface from a bitmap resource.
//-----------------------------------------------------------------------------
LPDIRECTDRAWSURFACE7 DDUtil_LoadBitmap( LPDIRECTDRAW7 pDD, LPCSTR strBitmap,
int dx, int dy )
{
HBITMAP hbm;
BITMAP bm;
DDSURFACEDESC2 ddsd;
LPDIRECTDRAWSURFACE7 pdds;
// Try to load the bitmap as a resource, if that fails, try it as a file
hbm = (HBITMAP)LoadImage( GetModuleHandle(NULL), strBitmap, IMAGE_BITMAP,
dx, dy, LR_CREATEDIBSECTION );
if( NULL == hbm )
hbm = (HBITMAP)LoadImage( NULL, strBitmap, IMAGE_BITMAP, dx, dy,
LR_LOADFROMFILE | LR_CREATEDIBSECTION );
if( NULL == hbm )
return NULL;
// Get size of the bitmap
GetObject( hbm, sizeof(bm), &bm );
// Create a DirectDrawSurface for this bitmap
ZeroMemory( &ddsd, sizeof(ddsd) );
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
ddsd.dwWidth = bm.bmWidth;
ddsd.dwHeight = bm.bmHeight;
if( FAILED( pDD->CreateSurface( &ddsd, &pdds, NULL ) ) )
return NULL;
DDUtil_CopyBitmap( pdds, hbm, 0, 0, 0, 0 );
DeleteObject( hbm );
return pdds;
}
//-----------------------------------------------------------------------------
// Name: DDUtil_ReLoadBitmap()
// Desc: Load a bitmap from a file or resource into a directdraw surface.
// normaly used to re-load a surface after a restore.
//-----------------------------------------------------------------------------
HRESULT DDUtil_ReLoadBitmap( LPDIRECTDRAWSURFACE7 pdds, LPCSTR strBitmap )
{
HBITMAP hbm;
HRESULT hr;
// Try to load the bitmap as a resource, if that fails, try it as a file
hbm = (HBITMAP)LoadImage( GetModuleHandle(NULL), strBitmap, IMAGE_BITMAP,
0, 0, LR_CREATEDIBSECTION );
if( NULL == hbm )
hbm = (HBITMAP)LoadImage( NULL, strBitmap, IMAGE_BITMAP, 0, 0,
LR_LOADFROMFILE | LR_CREATEDIBSECTION );
if( NULL == hbm )
{
OutputDebugString( "DDUtil_ReLoadBitmap: handle is null\n" );
return E_FAIL;
}
hr = DDUtil_CopyBitmap( pdds, hbm, 0, 0, 0, 0 );
if( FAILED( hr ) )
OutputDebugString( "DDUtil_ReLoadBitmap: copy bitmap failed\n" );
DeleteObject( hbm );
return hr;
}
//-----------------------------------------------------------------------------
// Name: DDUtil_CopyBitmap()
// Desc: Draw a bitmap into a DirectDrawSurface
//-----------------------------------------------------------------------------
HRESULT DDUtil_CopyBitmap( LPDIRECTDRAWSURFACE7 pdds, HBITMAP hbm,
int x, int y, int dx, int dy )
{
HDC hdcImage;
HDC hdc;
BITMAP bm;
DDSURFACEDESC2 ddsd;
HRESULT hr = E_FAIL;
if( hbm == NULL || pdds == NULL )
return E_FAIL;
// Make sure this surface is restored.
pdds->Restore();
// Select bitmap into a memoryDC so we can use it.
hdcImage = CreateCompatibleDC( NULL );
if( !hdcImage )
{
OutputDebugString("createcompatible dc failed\n");
SelectObject( hdcImage, hbm );
// Get size of the bitmap
GetObject( hbm, sizeof(bm), &bm );
dx = ( dx == 0 ? bm.bmWidth : dx ); // Use the passed size, unless zero
dy = ( dy == 0 ? bm.bmHeight : dy );
// Get size of surface.
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_HEIGHT | DDSD_WIDTH;
pdds->GetSurfaceDesc( &ddsd );
if( SUCCEEDED( hr = pdds->GetDC( &hdc ) ) )
{
StretchBlt( hdc, 0, 0, ddsd.dwWidth, ddsd.dwHeight, hdcImage,
x, y, dx, dy, SRCCOPY );
pdds->ReleaseDC( hdc );
}
DeleteDC( hdcImage );
}
return hr;
}
//-----------------------------------------------------------------------------
// Name: DDUtil_LoadPalette()
// Desc: Create a DirectDraw palette object from a bitmap resource
// if the resource does not exist or NULL is passed create a
// default 332 palette.
//-----------------------------------------------------------------------------
LPDIRECTDRAWPALETTE DDUtil_LoadPalette( LPDIRECTDRAW7 pDD, LPCSTR strBitmap )
{
LPDIRECTDRAWPALETTE pPalette;
int i;
int n;
int file;
HRSRC hRes;
BITMAPINFOHEADER* pbi;
PALETTEENTRY pe[256];
RGBQUAD* prgb;
// Build a 332 palette as the default.
for( i = 0; i < 256; i++ )
{
pe[i].peRed = (BYTE)( ( (i>>5) & 0x07 ) * 255 / 7 );
pe[i].peGreen = (BYTE)( ( (i>>2) & 0x07 ) * 255 / 7 );
pe[i].peBlue = (BYTE)( ( (i>>0) & 0x03 ) * 255 / 3 );
pe[i].peFlags = (BYTE)0;
}
if( strBitmap )
{
// Get a pointer to the bitmap resource.
if( hRes = FindResource( NULL, strBitmap, RT_BITMAP ) )
{
pbi = (BITMAPINFOHEADER*)LockResource( LoadResource( NULL, hRes ) );
if( NULL == pbi )
OutputDebugString("lock resource failed\n");
prgb = (RGBQUAD*)( (BYTE*)pbi + pbi->biSize );
if( NULL == pbi || pbi->biSize < sizeof(BITMAPINFOHEADER) )
n = 0;
else if( pbi->biBitCount > 8 )
n = 0;
else if( pbi->biClrUsed == 0 )
n = 1 << pbi->biBitCount;
else
n = pbi->biClrUsed;
// A DIB color table has its colors stored BGR not RGB
// so flip them around.
for( i = 0; i < n; i++ )
{
pe[i].peRed = prgb[i].rgbRed;
pe[i].peGreen = prgb[i].rgbGreen;
pe[i].peBlue = prgb[i].rgbBlue;
pe[i].peFlags = 0;
}
}
else if( ( file = _lopen( strBitmap, OF_READ ) ) != -1 )
{
BITMAPFILEHEADER bf;
BITMAPINFOHEADER bi;
_lread( file, &bf, sizeof(bf) );
_lread( file, &bi, sizeof(bi) );
_lread( file, pe, sizeof(pe) );
_lclose( file );
if( bi.biSize != sizeof(BITMAPINFOHEADER) )
n = 0;
else if( bi.biBitCount > 8 )
n = 0;
else if( bi.biClrUsed == 0 )
n = 1 << bi.biBitCount;
else
n = bi.biClrUsed;
// A DIB color table has its colors stored BGR not RGB
// so flip them around.
for (i = 0; i < n; i++)
{
BYTE r = pe[i].peRed;
pe[i].peRed = pe[i].peBlue;
pe[i].peBlue = r;
}
}
}
// Return the newly created palette
if( FAILED( pDD->CreatePalette( DDPCAPS_8BIT, pe, &pPalette, NULL ) ) )
return NULL;
return pPalette;
}
//-----------------------------------------------------------------------------
// Name: DDUtil_ColorMatch()
// Desc: Convert a RGB color to a pysical color.
// We do this by leting GDI SetPixel() do the color matching
// then we lock the memory and see what it got mapped to.
//-----------------------------------------------------------------------------
DWORD DDUtil_ColorMatch( LPDIRECTDRAWSURFACE7 pdds, COLORREF rgb )
{
COLORREF rgbT = CLR_INVALID;
HDC hdc;
DWORD dw = CLR_INVALID;
DDSURFACEDESC2 ddsd;
HRESULT hr;
// Use GDI SetPixel to color match for us
if( rgb != CLR_INVALID && SUCCEEDED( pdds->GetDC( &hdc ) ) )
{
rgbT = GetPixel( hdc, 0, 0 ); // Save current pixel value
SetPixel( hdc, 0, 0, rgb ); // Set our value
pdds->ReleaseDC( hdc );
}
// Now lock the surface so we can read back the converted color
ddsd.dwSize = sizeof(ddsd);
while( ( hr = pdds->Lock( NULL, &ddsd, 0, NULL ) ) == DDERR_WASSTILLDRAWING )
{
// Wait for surface to be free
}
if( SUCCEEDED( hr ) )
{
dw = *(DWORD *)ddsd.lpSurface; // Get DWORD
if( ddsd.ddpfPixelFormat.dwRGBBitCount < 32 )
dw &= (1 << ddsd.ddpfPixelFormat.dwRGBBitCount) - 1; // Mask it to bpp
pdds->Unlock( NULL );
}
// Now put the color that was there back.
if( rgbT != CLR_INVALID && rgb != CLR_INVALID && SUCCEEDED( pdds->GetDC(&hdc) ) )
{
SetPixel( hdc, 0, 0, rgbT );
pdds->ReleaseDC( hdc );
}
return dw;
}
//-----------------------------------------------------------------------------
// Name: DDUtil_SetColorKey()
// Desc: Set a color key for a surface, given a RGB.
// If you pass CLR_INVALID as the color key, the pixel
// in the upper-left corner will be used.
//-----------------------------------------------------------------------------
HRESULT DDUtil_SetColorKey( LPDIRECTDRAWSURFACE7 pdds, COLORREF rgb )
{
DDCOLORKEY ddck;
ddck.dwColorSpaceLowValue = DDUtil_ColorMatch( pdds, rgb );
ddck.dwColorSpaceHighValue = ddck.dwColorSpaceLowValue;
return pdds->SetColorKey( DDCKEY_SRCBLT, &ddck );
}