static inline INT get_element_size(const region_element* element)
{
INT needed = sizeof(DWORD); /* DWORD for the type */
switch(element->type)
{
case RegionDataRect:
return needed + sizeof(GpRect);
case RegionDataPath:
{
const GpPath *path = element->elementdata.path;
DWORD flags = is_integer_path(path) ? FLAGS_INTPATH : FLAGS_NOFLAGS;
/* 3 for headers, once again size doesn't count itself */
needed += sizeof(DWORD) * 3;
if (flags & FLAGS_INTPATH)
needed += 2 * sizeof(SHORT) * path->pathdata.Count;
else
needed += 2 * sizeof(FLOAT) * path->pathdata.Count;
needed += get_pathtypes_size(path);
needed += sizeof(DWORD); /* Extra DWORD for pathheader.size */
return needed;
}
case RegionDataEmptyRect:
case RegionDataInfiniteRect:
return needed;
default:
needed += get_element_size(element->elementdata.combine.left);
needed += get_element_size(element->elementdata.combine.right);
return needed;
}
return 0;
}
static inline void write_path_types(DWORD* location, INT* offset,
const GpPath* path)
{
memcpy(location + *offset, path->pathdata.Types, path->pathdata.Count);
/* The unwritten parts of the DWORD (if any) must be cleared */
if (path->pathdata.Count % sizeof(DWORD))
ZeroMemory(((BYTE*)location) + (*offset * sizeof(DWORD)) +
path->pathdata.Count,
sizeof(DWORD) - path->pathdata.Count % sizeof(DWORD));
*offset += (get_pathtypes_size(path) / sizeof(DWORD));
}
static void write_element(const region_element* element, DWORD *buffer,
INT* filled)
{
write_dword(buffer, filled, element->type);
switch (element->type)
{
case CombineModeReplace:
case CombineModeIntersect:
case CombineModeUnion:
case CombineModeXor:
case CombineModeExclude:
case CombineModeComplement:
write_element(element->elementdata.combine.left, buffer, filled);
write_element(element->elementdata.combine.right, buffer, filled);
break;
case RegionDataRect:
write_float(buffer, filled, element->elementdata.rect.X);
write_float(buffer, filled, element->elementdata.rect.Y);
write_float(buffer, filled, element->elementdata.rect.Width);
write_float(buffer, filled, element->elementdata.rect.Height);
break;
case RegionDataPath:
{
INT i;
const GpPath* path = element->elementdata.path;
struct _pathheader
{
DWORD size;
DWORD magic;
DWORD count;
DWORD flags;
} *pathheader;
pathheader = (struct _pathheader *)(buffer + *filled);
pathheader->flags = is_integer_path(path) ? FLAGS_INTPATH : FLAGS_NOFLAGS;
/* 3 for headers, once again size doesn't count itself */
pathheader->size = sizeof(DWORD) * 3;
if (pathheader->flags & FLAGS_INTPATH)
pathheader->size += 2 * sizeof(SHORT) * path->pathdata.Count;
else
pathheader->size += 2 * sizeof(FLOAT) * path->pathdata.Count;
pathheader->size += get_pathtypes_size(path);
pathheader->magic = VERSION_MAGIC;
pathheader->count = path->pathdata.Count;
*filled += 4;
switch (pathheader->flags & FLAGS_INTPATH)
{
case FLAGS_NOFLAGS:
for (i = 0; i < path->pathdata.Count; i++)
{
write_float(buffer, filled, path->pathdata.Points[i].X);
write_float(buffer, filled, path->pathdata.Points[i].Y);
}
break;
case FLAGS_INTPATH:
for (i = 0; i < path->pathdata.Count; i++)
{
write_packed_point(buffer, filled,
&path->pathdata.Points[i]);
}
break;
}
write_path_types(buffer, filled, path);
break;
}
case RegionDataEmptyRect:
case RegionDataInfiniteRect:
break;
}
}
/*****************************************************************************
* GdipCreateRegionPath [GDIPLUS.@]
*
* Creates a GpRegion from a GpPath
*
* PARAMS
* path [I] path to base the region on
* region [O] pointer to the newly allocated region
*
* RETURNS
* SUCCESS: Ok
* FAILURE: InvalidParameter
*
* NOTES
* If a path has no floating point points, its points will be stored as shorts
* (INTPATH)
*
* If a path is empty, it is considered to be an INTPATH
*/
GpStatus WINGDIPAPI GdipCreateRegionPath(GpPath *path, GpRegion **region)
{
region_element* element;
GpPoint *pointsi;
GpPointF *pointsf;
GpStatus stat;
DWORD flags = FLAGS_INTPATH;
INT count, i;
TRACE("%p, %p\n", path, region);
if (!(path && region))
return InvalidParameter;
*region = GdipAlloc(sizeof(GpRegion));
if(!*region)
return OutOfMemory;
stat = init_region(*region, RegionDataPath);
if (stat != Ok)
{
GdipDeleteRegion(*region);
return stat;
}
element = &(*region)->node;
count = path->pathdata.Count;
/* Test to see if the path is an Integer path */
if (count)
{
pointsi = GdipAlloc(sizeof(GpPoint) * count);
pointsf = GdipAlloc(sizeof(GpPointF) * count);
if (!(pointsi && pointsf))
{
GdipFree(pointsi);
GdipFree(pointsf);
GdipDeleteRegion(*region);
return OutOfMemory;
}
stat = GdipGetPathPointsI(path, pointsi, count);
if (stat != Ok)
{
GdipDeleteRegion(*region);
return stat;
}
stat = GdipGetPathPoints(path, pointsf, count);
if (stat != Ok)
{
GdipDeleteRegion(*region);
return stat;
}
for (i = 0; i < count; i++)
{
if (!(pointsi[i].X == pointsf[i].X &&
pointsi[i].Y == pointsf[i].Y ))
{
flags = FLAGS_NOFLAGS;
break;
}
}
GdipFree(pointsi);
GdipFree(pointsf);
}
stat = GdipClonePath(path, &element->elementdata.pathdata.path);
if (stat != Ok)
{
GdipDeleteRegion(*region);
return stat;
}
/* 3 for headers, once again size doesn't count itself */
element->elementdata.pathdata.pathheader.size = ((sizeof(DWORD) * 3));
switch(flags)
{
/* Floats, sent out as floats */
case FLAGS_NOFLAGS:
element->elementdata.pathdata.pathheader.size +=
(sizeof(DWORD) * count * 2);
break;
/* INTs, sent out as packed shorts */
case FLAGS_INTPATH:
element->elementdata.pathdata.pathheader.size +=
(sizeof(DWORD) * count);
break;
default:
FIXME("Unhandled flags (%08x). Expect wrong results.\n", flags);
}
element->elementdata.pathdata.pathheader.size += get_pathtypes_size(path);
element->elementdata.pathdata.pathheader.magic = VERSION_MAGIC;
element->elementdata.pathdata.pathheader.count = count;
element->elementdata.pathdata.pathheader.flags = flags;
(*region)->header.size = sizeheader_size + get_element_size(element);
return Ok;
}
