HSURF
APIENTRY
EngCreateDeviceSurface(
_In_ DHSURF dhsurf,
_In_ SIZEL sizl,
_In_ ULONG iFormat)
{
PSURFACE psurf;
HSURF hsurf;
/* Allocate a surface */
psurf = SURFACE_AllocSurface(STYPE_DEVICE,
sizl.cx,
sizl.cy,
iFormat,
0,
0,
0,
NULL);
if (!psurf)
{
DPRINT1("SURFACE_AllocSurface failed.\n");
return NULL;
}
/* Set the device handle */
psurf->SurfObj.dhsurf = dhsurf;
/* Set public ownership */
GDIOBJ_vSetObjectOwner(&psurf->BaseObject, GDI_OBJ_HMGR_PUBLIC);
/* Get the handle for the surface */
hsurf = psurf->SurfObj.hsurf;
/* Unlock the surface and return */
SURFACE_UnlockSurface(psurf);
return hsurf;
}
HBITMAP
APIENTRY
EngCreateBitmap(
_In_ SIZEL sizl,
_In_ LONG lWidth,
_In_ ULONG iFormat,
_In_ ULONG fl,
_In_opt_ PVOID pvBits)
{
PSURFACE psurf;
HBITMAP hbmp;
/* Allocate a surface */
psurf = SURFACE_AllocSurface(STYPE_BITMAP,
sizl.cx,
sizl.cy,
iFormat,
fl,
lWidth,
0,
pvBits);
if (!psurf)
{
DPRINT1("SURFACE_AllocSurface failed.\n");
return NULL;
}
/* Get the handle for the bitmap */
hbmp = (HBITMAP)psurf->SurfObj.hsurf;
/* Set public ownership */
GDIOBJ_vSetObjectOwner(&psurf->BaseObject, GDI_OBJ_HMGR_PUBLIC);
/* Unlock the surface and return */
SURFACE_UnlockSurface(psurf);
return hbmp;
}
HBITMAP
NTAPI
GreCreateBitmapEx(
_In_ ULONG nWidth,
_In_ ULONG nHeight,
_In_ ULONG cjWidthBytes,
_In_ ULONG iFormat,
_In_ USHORT fjBitmap,
_In_ ULONG cjSizeImage,
_In_opt_ PVOID pvBits,
_In_ FLONG flags)
{
PSURFACE psurf;
HBITMAP hbmp;
PVOID pvCompressedBits = NULL;
/* Verify format */
if (iFormat < BMF_1BPP || iFormat > BMF_PNG) return NULL;
/* The infamous RLE hack */
if ((iFormat == BMF_4RLE) || (iFormat == BMF_8RLE))
{
pvCompressedBits = pvBits;
pvBits = NULL;
iFormat = (iFormat == BMF_4RLE) ? BMF_4BPP : BMF_8BPP;
}
/* Allocate a surface */
psurf = SURFACE_AllocSurface(STYPE_BITMAP,
nWidth,
nHeight,
iFormat,
fjBitmap,
cjWidthBytes,
pvBits);
if (!psurf)
{
DPRINT1("SURFACE_AllocSurface failed.\n");
return NULL;
}
/* The infamous RLE hack */
if (pvCompressedBits)
{
SIZEL sizl;
LONG lDelta;
sizl.cx = nWidth;
sizl.cy = nHeight;
lDelta = WIDTH_BYTES_ALIGN32(nWidth, gajBitsPerFormat[iFormat]);
pvBits = psurf->SurfObj.pvBits;
DecompressBitmap(sizl, pvCompressedBits, pvBits, lDelta, iFormat);
}
/* Get the handle for the bitmap */
hbmp = (HBITMAP)psurf->SurfObj.hsurf;
/* Mark as API bitmap */
psurf->flags |= (flags | API_BITMAP);
/* Unlock the surface and return */
SURFACE_UnlockSurface(psurf);
return hbmp;
}
