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gdi32: Don't use MulDiv in ntgdi functions. 

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2021-09-24 12:56:00 +02:00 committed by Alexandre Julliard
parent 5e481ab965
commit 9ca7966aed
6 changed files with 38 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
dlls/gdi32/clipping.c
View File

@ -237,8 +237,8 @@ INT WINAPI NtGdiOffsetClipRgn( HDC hdc, INT x, INT y )
if (dc->hClipRgn)
{
x = MulDiv( x, dc->attr->vport_ext.cx, dc->attr->wnd_ext.cx );
y = MulDiv( y, dc->attr->vport_ext.cy, dc->attr->wnd_ext.cy );
x = muldiv( x, dc->attr->vport_ext.cx, dc->attr->wnd_ext.cx );
y = muldiv( y, dc->attr->vport_ext.cy, dc->attr->wnd_ext.cy );
if (dc->attr->layout & LAYOUT_RTL) x = -x;
ret = NtGdiOffsetRgn( dc->hClipRgn, x, y );
update_dc_clipping( dc );

4
dlls/gdi32/driver.c
View File

@ -382,9 +382,9 @@ static INT CDECL nulldrv_GetDeviceCaps( PHYSDEV dev, INT cap )
{
case DRIVERVERSION: return 0x4000;
case TECHNOLOGY: return DT_RASDISPLAY;
case HORZSIZE: return MulDiv( NtGdiGetDeviceCaps( dev->hdc, HORZRES ), 254,
case HORZSIZE: return muldiv( NtGdiGetDeviceCaps( dev->hdc, HORZRES ), 254,
NtGdiGetDeviceCaps( dev->hdc, LOGPIXELSX ) * 10 );
case VERTSIZE: return MulDiv( NtGdiGetDeviceCaps( dev->hdc, VERTRES ), 254,
case VERTSIZE: return muldiv( NtGdiGetDeviceCaps( dev->hdc, VERTRES ), 254,
NtGdiGetDeviceCaps( dev->hdc, LOGPIXELSY ) * 10 );
case HORZRES:
{

4
dlls/gdi32/font.c
View File

@ -2874,9 +2874,9 @@ static BOOL get_face_enum_data( struct gdi_font_face *face, ENUMLOGFONTEXW *elf,
UINT cell_height;
#define TM font->otm.otmTextMetrics
#define SCALE_NTM(value) (MulDiv( ntm->ntmTm.tmHeight, (value), TM.tmHeight ))
#define SCALE_NTM(value) (muldiv( ntm->ntmTm.tmHeight, (value), TM.tmHeight ))
cell_height = TM.tmHeight / ( -lf.lfHeight / font->otm.otmEMSquare );
ntm->ntmTm.tmHeight = MulDiv( ntm_ppem, cell_height, font->otm.otmEMSquare );
ntm->ntmTm.tmHeight = muldiv( ntm_ppem, cell_height, font->otm.otmEMSquare );
ntm->ntmTm.tmAscent = SCALE_NTM( TM.tmAscent );
ntm->ntmTm.tmDescent = ntm->ntmTm.tmHeight - ntm->ntmTm.tmAscent;
ntm->ntmTm.tmInternalLeading = SCALE_NTM( TM.tmInternalLeading );

2
dlls/gdi32/gdiobj.c
View File

@ -592,7 +592,7 @@ static HFONT create_scaled_font( const LOGFONTW *deffont )
}
lf = *deffont;
lf.lfHeight = MulDiv( lf.lfHeight, dpi, 96 );
lf.lfHeight = muldiv( lf.lfHeight, dpi, 96 );
return create_font( &lf );
}

36
dlls/gdi32/mapping.c
View File

@ -29,6 +29,30 @@
WINE_DEFAULT_DEBUG_CHANNEL(dc);
/* copied from kernelbase */
int muldiv( int a, int b, int c )
{
LONGLONG ret;
if (!c) return -1;
/* We want to deal with a positive divisor to simplify the logic. */
if (c < 0)
{
a = -a;
c = -c;
}
/* If the result is positive, we "add" to round. else, we subtract to round. */
if ((a < 0 && b < 0) || (a >= 0 && b >= 0))
ret = (((LONGLONG)a * b) + (c / 2)) / c;
else
ret = (((LONGLONG)a * b) - (c / 2)) / c;
if (ret > 2147483647 || ret < -2147483647) return -1;
return ret;
}
static SIZE get_dc_virtual_size( DC *dc )
{
SIZE ret = dc->attr->virtual_size;
@ -113,20 +137,20 @@ BOOL set_map_mode( DC *dc, int mode )
dc->attr->vport_ext.cy = -virtual_res.cy;
break;
case MM_LOENGLISH:
dc->attr->wnd_ext.cx = MulDiv(1000, virtual_size.cx, 254);
dc->attr->wnd_ext.cy = MulDiv(1000, virtual_size.cy, 254);
dc->attr->wnd_ext.cx = muldiv(1000, virtual_size.cx, 254);
dc->attr->wnd_ext.cy = muldiv(1000, virtual_size.cy, 254);
dc->attr->vport_ext.cx = virtual_res.cx;
dc->attr->vport_ext.cy = -virtual_res.cy;
break;
case MM_HIENGLISH:
dc->attr->wnd_ext.cx = MulDiv(10000, virtual_size.cx, 254);
dc->attr->wnd_ext.cy = MulDiv(10000, virtual_size.cy, 254);
dc->attr->wnd_ext.cx = muldiv(10000, virtual_size.cx, 254);
dc->attr->wnd_ext.cy = muldiv(10000, virtual_size.cy, 254);
dc->attr->vport_ext.cx = virtual_res.cx;
dc->attr->vport_ext.cy = -virtual_res.cy;
break;
case MM_TWIPS:
dc->attr->wnd_ext.cx = MulDiv(14400, virtual_size.cx, 254);
dc->attr->wnd_ext.cy = MulDiv(14400, virtual_size.cy, 254);
dc->attr->wnd_ext.cx = muldiv(14400, virtual_size.cx, 254);
dc->attr->wnd_ext.cy = muldiv(14400, virtual_size.cy, 254);
dc->attr->vport_ext.cx = virtual_res.cx;
dc->attr->vport_ext.cy = -virtual_res.cy;
break;

1
dlls/gdi32/ntgdi_private.h
View File

@ -391,6 +391,7 @@ extern void lp_to_dp( DC *dc, POINT *points, INT count ) DECLSPEC_HIDDEN;
extern BOOL set_map_mode( DC *dc, int mode ) DECLSPEC_HIDDEN;
extern void combine_transform( XFORM *result, const XFORM *xform1,
const XFORM *xform2 ) DECLSPEC_HIDDEN;
extern int muldiv( int a, int b, int c ) DECLSPEC_HIDDEN;
/* driver.c */
extern BOOL is_display_device( LPCWSTR name ) DECLSPEC_HIDDEN;