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gdi32: Fix handling of ModifyWorldTransform( MWT_IDENTITY ) on an emf dc. 

When the mode parameter is MWT_IDENTITY, the xform parameter can be NULL because it should be
ignored and use the identity matrix.

Fix Tally crashing when exporting a JPEG image.

Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zhiyi Zhang 2021-03-31 08:55:13 +01:00 committed by Alexandre Julliard
parent 8ccf24ccb0
commit efdd6f46c9
2 changed files with 28 additions and 1 deletions
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14
dlls/gdi32/enhmfdrv/dc.c
View File

@ -362,7 +362,19 @@ BOOL CDECL EMFDRV_ModifyWorldTransform( PHYSDEV dev, const XFORM *xform, DWORD m
emr.emr.iType = EMR_MODIFYWORLDTRANSFORM;
emr.emr.nSize = sizeof(emr);
emr.xform = *xform;
if (mode == MWT_IDENTITY)
{
emr.xform.eM11 = 1.0f;
emr.xform.eM12 = 0.0f;
emr.xform.eM21 = 0.0f;
emr.xform.eM22 = 1.0f;
emr.xform.eDx = 0.0f;
emr.xform.eDy = 0.0f;
}
else
{
emr.xform = *xform;
}
emr.iMode = mode;
if (!EMFDRV_WriteRecord( dev, &emr.emr )) return FALSE;

15
dlls/gdi32/tests/metafile.c
View File

@ -4158,6 +4158,18 @@ static INT CALLBACK enum_emf_WorldTransform(HDC hdc, HANDLETABLE *ht,
CombineTransform(&test_data->expected, &test_data->stored, &test_data->scale);
}
else if(lpXfrm->iMode == MWT_IDENTITY)
{
/* reset to identity matrix also does discard */
test_data->stored.eM11 = 1.0f;
test_data->stored.eM12 = 0.0f;
test_data->stored.eM21 = 0.0f;
test_data->stored.eM22 = 1.0f;
test_data->stored.eDx = 0.0f;
test_data->stored.eDy = 0.0f;
CombineTransform(&test_data->expected, &test_data->stored, &test_data->scale);
}
/* verify it is updated immediately */
ret = GetWorldTransform(hdc, &xform);
@ -4265,6 +4277,9 @@ static void test_emf_WorldTransform(void)
ret = SetWorldTransform(hdcMetafile, &xform); /* EMR_SETWORLDTRANSFORM */
ok(ret == TRUE, "SetWorldTransform failed\n");
ret = ModifyWorldTransform(hdcMetafile, NULL, MWT_IDENTITY); /* EMR_MODIFYWORLDTRANSFORM */
ok(ret == TRUE, "ModifyWorldTransform failed\n");
set_rotation_xform(&xform, M_PI / 2.f, -2, -3);
ret = ModifyWorldTransform(hdcMetafile, &xform, MWT_LEFTMULTIPLY); /* EMR_MODIFYWORLDTRANSFORM */
ok(ret == TRUE, "ModifyWorldTransform failed\n");