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wine/dlls/gdiplus/region.c

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/*
* Copyright (C) 2008 Google (Lei Zhang)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "objbase.h"
#include "gdiplus.h"
#include "gdiplus_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
/**********************************************************
*
* Data returned by GdipGetRegionData looks something like this:
*
* struct region_data_header
* {
* DWORD size; size in bytes of the data - 8.
* DWORD magic1; probably a checksum.
* DWORD magic2; always seems to be 0xdbc01001 - version?
* DWORD num_ops; number of combining ops * 2
* };
*
* Then follows a sequence of combining ops and region elements.
*
* A region element is either a RECTF or some path data.
*
* Combining ops are just stored as their CombineMode value.
*
* Each RECTF is preceded by the DWORD 0x10000000. An empty rect is
* stored as 0x10000002 (with no following RECTF) and an infinite rect
* is stored as 0x10000003 (again with no following RECTF).
*
* Path data is preceded by the DWORD 0x10000001. Then follows a
* DWORD size and then size bytes of data.
*
* The combining ops are stored in the reverse order to the region
* elements and in the reverse order to which the region was
* constructed.
*
* When two or more complex regions (ie those with more than one
* element) are combined, the combining op for the two regions comes
* first, then the combining ops for the region elements in region 1,
* followed by the region elements for region 1, then follows the
* combining ops for region 2 and finally region 2's region elements.
* Presumably you're supposed to use the 0x1000000x header to find the
* end of the op list (the count of the elements in each region is not
* stored).
*
* When a simple region (1 element) is combined, it's treated as if a
* single rect/path is being combined.
*
*/
#define FLAGS_NOFLAGS 0x0
#define FLAGS_INTPATH 0x4000
/* Header size as far as header->size is concerned. This doesn't include
* header->size or header->checksum
*/
static const INT sizeheader_size = sizeof(DWORD) * 2;
typedef struct packed_point
{
short X;
short Y;
} packed_point;
/* Everything is measured in DWORDS; round up if there's a remainder */
static inline INT get_pathtypes_size(const GpPath* path)
{
INT needed = path->pathdata.Count / sizeof(DWORD);
if (path->pathdata.Count % sizeof(DWORD) > 0)
needed++;
return needed * sizeof(DWORD);
}
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:
needed += element->elementdata.pathdata.pathheader.size;
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;
}
/* Does not check parameters, caller must do that */
static inline GpStatus init_region(GpRegion* region, const RegionType type)
{
region->node.type = type;
region->header.checksum = 0xdeadbeef;
region->header.magic = VERSION_MAGIC;
region->header.num_children = 0;
region->header.size = sizeheader_size + get_element_size(&region->node);
return Ok;
}
static inline GpStatus clone_element(const region_element* element,
region_element** element2)
{
GpStatus stat;
/* root node is allocated with GpRegion */
if(!*element2){
*element2 = GdipAlloc(sizeof(region_element));
if (!*element2)
return OutOfMemory;
}
(*element2)->type = element->type;
switch (element->type)
{
case RegionDataRect:
(*element2)->elementdata.rect = element->elementdata.rect;
break;
case RegionDataEmptyRect:
case RegionDataInfiniteRect:
break;
case RegionDataPath:
(*element2)->elementdata.pathdata.pathheader = element->elementdata.pathdata.pathheader;
stat = GdipClonePath(element->elementdata.pathdata.path,
&(*element2)->elementdata.pathdata.path);
if (stat != Ok) goto clone_out;
break;
default:
(*element2)->elementdata.combine.left = NULL;
(*element2)->elementdata.combine.right = NULL;
stat = clone_element(element->elementdata.combine.left,
&(*element2)->elementdata.combine.left);
if (stat != Ok) goto clone_out;
stat = clone_element(element->elementdata.combine.right,
&(*element2)->elementdata.combine.right);
if (stat != Ok) goto clone_out;
break;
}
return Ok;
clone_out:
delete_element(*element2);
*element2 = NULL;
return stat;
}
/* Common code for CombineRegion*
* All the caller has to do is get its format into an element
*/
static inline void fuse_region(GpRegion* region, region_element* left,
region_element* right, const CombineMode mode)
{
region->node.type = mode;
region->node.elementdata.combine.left = left;
region->node.elementdata.combine.right = right;
region->header.size = sizeheader_size + get_element_size(&region->node);
region->header.num_children += 2;
}
/*****************************************************************************
* GdipCloneRegion [GDIPLUS.@]
*
* Creates a deep copy of the region
*
* PARAMS
* region [I] source region
* clone [O] resulting clone
*
* RETURNS
* SUCCESS: Ok
* FAILURE: InvalidParameter or OutOfMemory
*/
GpStatus WINGDIPAPI GdipCloneRegion(GpRegion *region, GpRegion **clone)
{
region_element *element;
TRACE("%p %p\n", region, clone);
if (!(region && clone))
return InvalidParameter;
*clone = GdipAlloc(sizeof(GpRegion));
if (!*clone)
return OutOfMemory;
element = &(*clone)->node;
(*clone)->header = region->header;
return clone_element(&region->node, &element);
}
/*****************************************************************************
* GdipCombineRegionPath [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipCombineRegionPath(GpRegion *region, GpPath *path, CombineMode mode)
{
GpRegion *path_region;
region_element *left, *right = NULL;
GpStatus stat;
TRACE("%p %p %d\n", region, path, mode);
if (!(region && path))
return InvalidParameter;
stat = GdipCreateRegionPath(path, &path_region);
if (stat != Ok)
return stat;
/* simply replace region data */
if(mode == CombineModeReplace){
delete_element(&region->node);
memcpy(region, path_region, sizeof(GpRegion));
GdipFree(path_region);
return Ok;
}
left = GdipAlloc(sizeof(region_element));
if (!left)
goto out;
*left = region->node;
stat = clone_element(&path_region->node, &right);
if (stat != Ok)
goto out;
fuse_region(region, left, right, mode);
GdipDeleteRegion(path_region);
return Ok;
out:
GdipFree(left);
GdipDeleteRegion(path_region);
return stat;
}
/*****************************************************************************
* GdipCombineRegionRect [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipCombineRegionRect(GpRegion *region,
GDIPCONST GpRectF *rect, CombineMode mode)
{
GpRegion *rect_region;
region_element *left, *right = NULL;
GpStatus stat;
TRACE("%p %p %d\n", region, rect, mode);
if (!(region && rect))
return InvalidParameter;
stat = GdipCreateRegionRect(rect, &rect_region);
if (stat != Ok)
return stat;
/* simply replace region data */
if(mode == CombineModeReplace){
delete_element(&region->node);
memcpy(region, rect_region, sizeof(GpRegion));
GdipFree(rect_region);
return Ok;
}
left = GdipAlloc(sizeof(region_element));
if (!left)
goto out;
memcpy(left, &region->node, sizeof(region_element));
stat = clone_element(&rect_region->node, &right);
if (stat != Ok)
goto out;
fuse_region(region, left, right, mode);
GdipDeleteRegion(rect_region);
return Ok;
out:
GdipFree(left);
GdipDeleteRegion(rect_region);
return stat;
}
/*****************************************************************************
* GdipCombineRegionRectI [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipCombineRegionRectI(GpRegion *region,
GDIPCONST GpRect *rect, CombineMode mode)
{
GpRectF rectf;
TRACE("%p %p %d\n", region, rect, mode);
if (!rect)
return InvalidParameter;
rectf.X = (REAL)rect->X;
rectf.Y = (REAL)rect->Y;
rectf.Height = (REAL)rect->Height;
rectf.Width = (REAL)rect->Width;
return GdipCombineRegionRect(region, &rectf, mode);
}
/*****************************************************************************
* GdipCombineRegionRegion [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipCombineRegionRegion(GpRegion *region1,
GpRegion *region2, CombineMode mode)
{
region_element *left, *right = NULL;
GpStatus stat;
GpRegion *reg2copy;
TRACE("%p %p %d\n", region1, region2, mode);
if(!(region1 && region2))
return InvalidParameter;
/* simply replace region data */
if(mode == CombineModeReplace){
stat = GdipCloneRegion(region2, &reg2copy);
if(stat != Ok) return stat;
delete_element(&region1->node);
memcpy(region1, reg2copy, sizeof(GpRegion));
GdipFree(reg2copy);
return Ok;
}
left = GdipAlloc(sizeof(region_element));
if (!left)
return OutOfMemory;
*left = region1->node;
stat = clone_element(&region2->node, &right);
if (stat != Ok)
{
GdipFree(left);
return OutOfMemory;
}
fuse_region(region1, left, right, mode);
region1->header.num_children += region2->header.num_children;
return Ok;
}
/*****************************************************************************
* GdipCreateRegion [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipCreateRegion(GpRegion **region)
{
TRACE("%p\n", region);
if(!region)
return InvalidParameter;
*region = GdipAlloc(sizeof(GpRegion));
if(!*region)
return OutOfMemory;
return init_region(*region, RegionDataInfiniteRect);
}
/*****************************************************************************
* 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;
}
/*****************************************************************************
* GdipCreateRegionRect [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipCreateRegionRect(GDIPCONST GpRectF *rect,
GpRegion **region)
{
GpStatus stat;
TRACE("%p, %p\n", rect, region);
if (!(rect && region))
return InvalidParameter;
*region = GdipAlloc(sizeof(GpRegion));
stat = init_region(*region, RegionDataRect);
if(stat != Ok)
{
GdipDeleteRegion(*region);
return stat;
}
(*region)->node.elementdata.rect.X = rect->X;
(*region)->node.elementdata.rect.Y = rect->Y;
(*region)->node.elementdata.rect.Width = rect->Width;
(*region)->node.elementdata.rect.Height = rect->Height;
return Ok;
}
/*****************************************************************************
* GdipCreateRegionRectI [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipCreateRegionRectI(GDIPCONST GpRect *rect,
GpRegion **region)
{
GpRectF rectf;
TRACE("%p, %p\n", rect, region);
rectf.X = (REAL)rect->X;
rectf.Y = (REAL)rect->Y;
rectf.Width = (REAL)rect->Width;
rectf.Height = (REAL)rect->Height;
return GdipCreateRegionRect(&rectf, region);
}
GpStatus WINGDIPAPI GdipCreateRegionRgnData(GDIPCONST BYTE *data, INT size, GpRegion **region)
{
FIXME("(%p, %d, %p): stub\n", data, size, region);
*region = NULL;
return NotImplemented;
}
/******************************************************************************
* GdipCreateRegionHrgn [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipCreateRegionHrgn(HRGN hrgn, GpRegion **region)
{
DWORD size;
LPRGNDATA buf;
LPRECT rect;
GpStatus stat;
GpPath* path;
GpRegion* local;
int i;
TRACE("(%p, %p)\n", hrgn, region);
if(!region || !(size = GetRegionData(hrgn, 0, NULL)))
return InvalidParameter;
buf = GdipAlloc(size);
if(!buf)
return OutOfMemory;
if(!GetRegionData(hrgn, size, buf)){
GdipFree(buf);
return GenericError;
}
if(buf->rdh.nCount == 0){
if((stat = GdipCreateRegion(&local)) != Ok){
GdipFree(buf);
return stat;
}
if((stat = GdipSetEmpty(local)) != Ok){
GdipFree(buf);
GdipDeleteRegion(local);
return stat;
}
*region = local;
GdipFree(buf);
return Ok;
}
if((stat = GdipCreatePath(FillModeAlternate, &path)) != Ok){
GdipFree(buf);
return stat;
}
rect = (LPRECT)buf->Buffer;
for(i = 0; i < buf->rdh.nCount; i++){
if((stat = GdipAddPathRectangle(path, (REAL)rect->left, (REAL)rect->top,
(REAL)(rect->right - rect->left), (REAL)(rect->bottom - rect->top))) != Ok){
GdipFree(buf);
GdipDeletePath(path);
return stat;
}
rect++;
}
stat = GdipCreateRegionPath(path, region);
GdipFree(buf);
GdipDeletePath(path);
return stat;
}
/*****************************************************************************
* GdipDeleteRegion [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipDeleteRegion(GpRegion *region)
{
TRACE("%p\n", region);
if (!region)
return InvalidParameter;
delete_element(&region->node);
GdipFree(region);
return Ok;
}
/*****************************************************************************
* GdipGetRegionBounds [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipGetRegionBounds(GpRegion *region, GpGraphics *graphics, GpRectF *rect)
{
HRGN hrgn;
RECT r;
GpStatus status;
TRACE("(%p, %p, %p)\n", region, graphics, rect);
if(!region || !graphics || !rect)
return InvalidParameter;
/* Contrary to MSDN, native ignores the graphics transform. */
status = GdipGetRegionHRgn(region, NULL, &hrgn);
if(status != Ok)
return status;
/* infinite */
if(!hrgn){
rect->X = rect->Y = -(REAL)(1 << 22);
rect->Width = rect->Height = (REAL)(1 << 23);
return Ok;
}
if(GetRgnBox(hrgn, &r)){
rect->X = r.left;
rect->Y = r.top;
rect->Width = r.right - r.left;
rect->Height = r.bottom - r.top;
}
else
status = GenericError;
DeleteObject(hrgn);
return status;
}
/*****************************************************************************
* GdipGetRegionBoundsI [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipGetRegionBoundsI(GpRegion *region, GpGraphics *graphics, GpRect *rect)
{
GpRectF rectf;
GpStatus status;
TRACE("(%p, %p, %p)\n", region, graphics, rect);
if(!rect)
return InvalidParameter;
status = GdipGetRegionBounds(region, graphics, &rectf);
if(status == Ok){
rect->X = roundr(rectf.X);
rect->Y = roundr(rectf.X);
rect->Width = roundr(rectf.Width);
rect->Height = roundr(rectf.Height);
}
return status;
}
static inline void write_dword(DWORD* location, INT* offset, const DWORD write)
{
location[*offset] = write;
(*offset)++;
}
static inline void write_float(DWORD* location, INT* offset, const FLOAT write)
{
((FLOAT*)location)[*offset] = write;
(*offset)++;
}
static inline void write_packed_point(DWORD* location, INT* offset,
const GpPointF* write)
{
packed_point point;
point.X = write->X;
point.Y = write->Y;
memcpy(location + *offset, &point, sizeof(packed_point));
(*offset)++;
}
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.pathdata.path;
memcpy(buffer + *filled, &element->elementdata.pathdata.pathheader,
sizeof(element->elementdata.pathdata.pathheader));
*filled += sizeof(element->elementdata.pathdata.pathheader) / sizeof(DWORD);
switch (element->elementdata.pathdata.pathheader.flags)
{
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]);
}
}
write_path_types(buffer, filled, path);
break;
}
case RegionDataEmptyRect:
case RegionDataInfiniteRect:
break;
}
}
/*****************************************************************************
* GdipGetRegionData [GDIPLUS.@]
*
* Returns the header, followed by combining ops and region elements.
*
* PARAMS
* region [I] region to retrieve from
* buffer [O] buffer to hold the resulting data
* size [I] size of the buffer
* needed [O] (optional) how much data was written
*
* RETURNS
* SUCCESS: Ok
* FAILURE: InvalidParameter
*
* NOTES
* The header contains the size, a checksum, a version string, and the number
* of children. The size does not count itself or the checksum.
* Version is always something like 0xdbc01001 or 0xdbc01002
*
* An element is a RECT, or PATH; Combining ops are stored as their
* CombineMode value. Special regions (infinite, empty) emit just their
* op-code; GpRectFs emit their code followed by their points; GpPaths emit
* their code followed by a second header for the path followed by the actual
* path data. Followed by the flags for each point. The pathheader contains
* the size of the data to follow, a version number again, followed by a count
* of how many points, and any special flags which may apply. 0x4000 means its
* a path of shorts instead of FLOAT.
*
* Combining Ops are stored in reverse order from when they were constructed;
* the output is a tree where the left side combining area is always taken
* first.
*/
GpStatus WINGDIPAPI GdipGetRegionData(GpRegion *region, BYTE *buffer, UINT size,
UINT *needed)
{
INT filled = 0;
TRACE("%p, %p, %d, %p\n", region, buffer, size, needed);
if (!(region && buffer && size))
return InvalidParameter;
memcpy(buffer, &region->header, sizeof(region->header));
filled += sizeof(region->header) / sizeof(DWORD);
/* With few exceptions, everything written is DWORD aligned,
* so use that as our base */
write_element(&region->node, (DWORD*)buffer, &filled);
if (needed)
*needed = filled * sizeof(DWORD);
return Ok;
}
/*****************************************************************************
* GdipGetRegionDataSize [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipGetRegionDataSize(GpRegion *region, UINT *needed)
{
TRACE("%p, %p\n", region, needed);
if (!(region && needed))
return InvalidParameter;
/* header.size doesn't count header.size and header.checksum */
*needed = region->header.size + sizeof(DWORD) * 2;
return Ok;
}
static GpStatus get_path_hrgn(GpPath *path, GpGraphics *graphics, HRGN *hrgn)
{
HDC new_hdc=NULL;
GpGraphics *new_graphics=NULL;
GpStatus stat;
INT save_state;
if (!graphics)
{
new_hdc = GetDC(0);
if (!new_hdc)
return OutOfMemory;
stat = GdipCreateFromHDC(new_hdc, &new_graphics);
graphics = new_graphics;
if (stat != Ok)
{
ReleaseDC(0, new_hdc);
return stat;
}
}
else if (!graphics->hdc)
{
graphics->hdc = new_hdc = GetDC(0);
if (!new_hdc)
return OutOfMemory;
}
save_state = SaveDC(graphics->hdc);
EndPath(graphics->hdc);
SetPolyFillMode(graphics->hdc, (path->fill == FillModeAlternate ? ALTERNATE
: WINDING));
stat = trace_path(graphics, path);
if (stat == Ok)
{
*hrgn = PathToRegion(graphics->hdc);
stat = *hrgn ? Ok : OutOfMemory;
}
RestoreDC(graphics->hdc, save_state);
if (new_hdc)
{
ReleaseDC(0, new_hdc);
if (new_graphics)
GdipDeleteGraphics(new_graphics);
else
graphics->hdc = NULL;
}
return stat;
}
static GpStatus get_region_hrgn(struct region_element *element, GpGraphics *graphics, HRGN *hrgn)
{
switch (element->type)
{
case RegionDataInfiniteRect:
*hrgn = NULL;
return Ok;
case RegionDataEmptyRect:
*hrgn = CreateRectRgn(0, 0, 0, 0);
return *hrgn ? Ok : OutOfMemory;
case RegionDataPath:
return get_path_hrgn(element->elementdata.pathdata.path, graphics, hrgn);
case RegionDataRect:
{
GpPath* path;
GpStatus stat;
GpRectF* rc = &element->elementdata.rect;
stat = GdipCreatePath(FillModeAlternate, &path);
if (stat != Ok)
return stat;
stat = GdipAddPathRectangle(path, rc->X, rc->Y, rc->Width, rc->Height);
if (stat == Ok)
stat = get_path_hrgn(path, graphics, hrgn);
GdipDeletePath(path);
return stat;
}
case CombineModeIntersect:
case CombineModeUnion:
case CombineModeXor:
case CombineModeExclude:
case CombineModeComplement:
{
HRGN left, right;
GpStatus stat;
int ret;
stat = get_region_hrgn(element->elementdata.combine.left, graphics, &left);
if (stat != Ok)
{
*hrgn = NULL;
return stat;
}
if (left == NULL)
{
/* existing region is infinite */
switch (element->type)
{
case CombineModeIntersect:
return get_region_hrgn(element->elementdata.combine.right, graphics, hrgn);
case CombineModeXor: case CombineModeExclude:
FIXME("cannot exclude from an infinite region\n");
/* fall-through */
case CombineModeUnion: case CombineModeComplement:
*hrgn = NULL;
return Ok;
}
}
stat = get_region_hrgn(element->elementdata.combine.right, graphics, &right);
if (stat != Ok)
{
DeleteObject(left);
*hrgn = NULL;
return stat;
}
if (right == NULL)
{
/* new region is infinite */
switch (element->type)
{
case CombineModeIntersect:
*hrgn = left;
return Ok;
case CombineModeXor: case CombineModeComplement:
FIXME("cannot exclude from an infinite region\n");
/* fall-through */
case CombineModeUnion: case CombineModeExclude:
DeleteObject(left);
*hrgn = NULL;
return Ok;
}
}
switch (element->type)
{
case CombineModeIntersect:
ret = CombineRgn(left, left, right, RGN_AND);
break;
case CombineModeUnion:
ret = CombineRgn(left, left, right, RGN_OR);
break;
case CombineModeXor:
ret = CombineRgn(left, left, right, RGN_XOR);
break;
case CombineModeExclude:
ret = CombineRgn(left, left, right, RGN_DIFF);
break;
case CombineModeComplement:
ret = CombineRgn(left, right, left, RGN_DIFF);
break;
default:
ret = ERROR;
}
DeleteObject(right);
if (ret == ERROR)
{
DeleteObject(left);
*hrgn = NULL;
return GenericError;
}
*hrgn = left;
return Ok;
}
default:
FIXME("GdipGetRegionHRgn unimplemented for region type=%x\n", element->type);
*hrgn = NULL;
return NotImplemented;
}
}
/*****************************************************************************
* GdipGetRegionHRgn [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipGetRegionHRgn(GpRegion *region, GpGraphics *graphics, HRGN *hrgn)
{
TRACE("(%p, %p, %p)\n", region, graphics, hrgn);
if (!region || !hrgn)
return InvalidParameter;
return get_region_hrgn(&region->node, graphics, hrgn);
}
GpStatus WINGDIPAPI GdipIsEmptyRegion(GpRegion *region, GpGraphics *graphics, BOOL *res)
{
TRACE("(%p, %p, %p)\n", region, graphics, res);
if(!region || !graphics || !res)
return InvalidParameter;
*res = (region->node.type == RegionDataEmptyRect);
return Ok;
}
/*****************************************************************************
* GdipIsEqualRegion [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipIsEqualRegion(GpRegion *region, GpRegion *region2, GpGraphics *graphics,
BOOL *res)
{
HRGN hrgn1, hrgn2;
GpStatus stat;
TRACE("(%p, %p, %p, %p)\n", region, region2, graphics, res);
if(!region || !region2 || !graphics || !res)
return InvalidParameter;
stat = GdipGetRegionHRgn(region, graphics, &hrgn1);
if(stat != Ok)
return stat;
stat = GdipGetRegionHRgn(region2, graphics, &hrgn2);
if(stat != Ok){
DeleteObject(hrgn1);
return stat;
}
*res = EqualRgn(hrgn1, hrgn2);
/* one of GpRegions is infinite */
if(*res == ERROR)
*res = (!hrgn1 && !hrgn2);
DeleteObject(hrgn1);
DeleteObject(hrgn2);
return Ok;
}
/*****************************************************************************
* GdipIsInfiniteRegion [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipIsInfiniteRegion(GpRegion *region, GpGraphics *graphics, BOOL *res)
{
/* I think graphics is ignored here */
TRACE("(%p, %p, %p)\n", region, graphics, res);
if(!region || !graphics || !res)
return InvalidParameter;
*res = (region->node.type == RegionDataInfiniteRect);
return Ok;
}
/*****************************************************************************
* GdipIsVisibleRegionRect [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipIsVisibleRegionRect(GpRegion* region, REAL x, REAL y, REAL w, REAL h, GpGraphics *graphics, BOOL *res)
{
HRGN hrgn;
GpStatus stat;
RECT rect;
TRACE("(%p, %.2f, %.2f, %.2f, %.2f, %p, %p)\n", region, x, y, w, h, graphics, res);
if(!region || !res)
return InvalidParameter;
if((stat = GdipGetRegionHRgn(region, NULL, &hrgn)) != Ok)
return stat;
/* infinite */
if(!hrgn){
*res = TRUE;
return Ok;
}
rect.left = ceilr(x);
rect.top = ceilr(y);
rect.right = ceilr(x + w);
rect.bottom = ceilr(y + h);
*res = RectInRegion(hrgn, &rect);
DeleteObject(hrgn);
return Ok;
}
/*****************************************************************************
* GdipIsVisibleRegionRectI [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipIsVisibleRegionRectI(GpRegion* region, INT x, INT y, INT w, INT h, GpGraphics *graphics, BOOL *res)
{
TRACE("(%p, %d, %d, %d, %d, %p, %p)\n", region, x, y, w, h, graphics, res);
if(!region || !res)
return InvalidParameter;
return GdipIsVisibleRegionRect(region, (REAL)x, (REAL)y, (REAL)w, (REAL)h, graphics, res);
}
/*****************************************************************************
* GdipIsVisibleRegionPoint [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipIsVisibleRegionPoint(GpRegion* region, REAL x, REAL y, GpGraphics *graphics, BOOL *res)
{
HRGN hrgn;
GpStatus stat;
TRACE("(%p, %.2f, %.2f, %p, %p)\n", region, x, y, graphics, res);
if(!region || !res)
return InvalidParameter;
if((stat = GdipGetRegionHRgn(region, NULL, &hrgn)) != Ok)
return stat;
/* infinite */
if(!hrgn){
*res = TRUE;
return Ok;
}
*res = PtInRegion(hrgn, roundr(x), roundr(y));
DeleteObject(hrgn);
return Ok;
}
/*****************************************************************************
* GdipIsVisibleRegionPointI [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipIsVisibleRegionPointI(GpRegion* region, INT x, INT y, GpGraphics *graphics, BOOL *res)
{
TRACE("(%p, %d, %d, %p, %p)\n", region, x, y, graphics, res);
return GdipIsVisibleRegionPoint(region, (REAL)x, (REAL)y, graphics, res);
}
/*****************************************************************************
* GdipSetEmpty [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipSetEmpty(GpRegion *region)
{
GpStatus stat;
TRACE("%p\n", region);
if (!region)
return InvalidParameter;
delete_element(&region->node);
stat = init_region(region, RegionDataEmptyRect);
return stat;
}
GpStatus WINGDIPAPI GdipSetInfinite(GpRegion *region)
{
GpStatus stat;
TRACE("%p\n", region);
if (!region)
return InvalidParameter;
delete_element(&region->node);
stat = init_region(region, RegionDataInfiniteRect);
return stat;
}
/* Transforms GpRegion elements with given matrix */
static GpStatus transform_region_element(region_element* element, GpMatrix *matrix)
{
GpStatus stat;
switch(element->type)
{
case RegionDataEmptyRect:
case RegionDataInfiniteRect:
return Ok;
case RegionDataRect:
{
/* We can't transform a rectangle, so convert it to a path. */
GpRegion *new_region;
GpPath *path;
stat = GdipCreatePath(FillModeAlternate, &path);
if (stat == Ok)
{
stat = GdipAddPathRectangle(path,
element->elementdata.rect.X, element->elementdata.rect.Y,
element->elementdata.rect.Width, element->elementdata.rect.Height);
if (stat == Ok)
stat = GdipCreateRegionPath(path, &new_region);
GdipDeletePath(path);
}
if (stat == Ok)
{
/* Steal the element from the created region. */
memcpy(element, &new_region->node, sizeof(region_element));
HeapFree(GetProcessHeap(), 0, new_region);
}
else
return stat;
}
/* Fall-through to do the actual conversion. */
case RegionDataPath:
stat = GdipTransformMatrixPoints(matrix,
element->elementdata.pathdata.path->pathdata.Points,
element->elementdata.pathdata.path->pathdata.Count);
return stat;
default:
stat = transform_region_element(element->elementdata.combine.left, matrix);
if (stat == Ok)
stat = transform_region_element(element->elementdata.combine.right, matrix);
return stat;
}
}
GpStatus WINGDIPAPI GdipTransformRegion(GpRegion *region, GpMatrix *matrix)
{
TRACE("(%p, %p)\n", region, matrix);
if (!region || !matrix)
return InvalidParameter;
return transform_region_element(&region->node, matrix);
}
/* Translates GpRegion elements with specified offsets */
static void translate_region_element(region_element* element, REAL dx, REAL dy)
{
INT i;
switch(element->type)
{
case RegionDataEmptyRect:
case RegionDataInfiniteRect:
return;
case RegionDataRect:
element->elementdata.rect.X += dx;
element->elementdata.rect.Y += dy;
return;
case RegionDataPath:
for(i = 0; i < element->elementdata.pathdata.path->pathdata.Count; i++){
element->elementdata.pathdata.path->pathdata.Points[i].X += dx;
element->elementdata.pathdata.path->pathdata.Points[i].Y += dy;
}
return;
default:
translate_region_element(element->elementdata.combine.left, dx, dy);
translate_region_element(element->elementdata.combine.right, dx, dy);
return;
}
}
/*****************************************************************************
* GdipTranslateRegion [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipTranslateRegion(GpRegion *region, REAL dx, REAL dy)
{
TRACE("(%p, %f, %f)\n", region, dx, dy);
if(!region)
return InvalidParameter;
translate_region_element(&region->node, dx, dy);
return Ok;
}
/*****************************************************************************
* GdipTranslateRegionI [GDIPLUS.@]
*/
GpStatus WINGDIPAPI GdipTranslateRegionI(GpRegion *region, INT dx, INT dy)
{
TRACE("(%p, %d, %d)\n", region, dx, dy);
return GdipTranslateRegion(region, (REAL)dx, (REAL)dy);
}
static GpStatus get_region_scans_data(GpRegion *region, GpMatrix *matrix, LPRGNDATA *data)
{
GpRegion *region_copy;
GpStatus stat;
HRGN hrgn;
DWORD data_size;
stat = GdipCloneRegion(region, &region_copy);
if (stat == Ok)
{
stat = GdipTransformRegion(region_copy, matrix);
if (stat == Ok)
stat = GdipGetRegionHRgn(region_copy, NULL, &hrgn);
if (stat == Ok)
{
if (hrgn)
{
data_size = GetRegionData(hrgn, 0, NULL);
*data = GdipAlloc(data_size);
if (*data)
GetRegionData(hrgn, data_size, *data);
else
stat = OutOfMemory;
DeleteObject(hrgn);
}
else
{
data_size = sizeof(RGNDATAHEADER) + sizeof(RECT);
*data = GdipAlloc(data_size);
if (*data)
{
(*data)->rdh.dwSize = sizeof(RGNDATAHEADER);
(*data)->rdh.iType = RDH_RECTANGLES;
(*data)->rdh.nCount = 1;
(*data)->rdh.nRgnSize = sizeof(RECT);
(*data)->rdh.rcBound.left = (*data)->rdh.rcBound.top = -0x400000;
(*data)->rdh.rcBound.right = (*data)->rdh.rcBound.bottom = 0x400000;
memcpy(&(*data)->Buffer, &(*data)->rdh.rcBound, sizeof(RECT));
}
else
stat = OutOfMemory;
}
}
GdipDeleteRegion(region_copy);
}
return stat;
}
GpStatus WINGDIPAPI GdipGetRegionScansCount(GpRegion *region, UINT *count, GpMatrix *matrix)
{
GpStatus stat;
LPRGNDATA data;
TRACE("(%p, %p, %p)\n", region, count, matrix);
if (!region || !count || !matrix)
return InvalidParameter;
stat = get_region_scans_data(region, matrix, &data);
if (stat == Ok)
{
*count = data->rdh.nCount;
GdipFree(data);
}
return stat;
}
GpStatus WINGDIPAPI GdipGetRegionScansI(GpRegion *region, GpRect *scans, INT *count, GpMatrix *matrix)
{
GpStatus stat;
INT i;
LPRGNDATA data;
RECT *rects;
if (!region || !count || !matrix)
return InvalidParameter;
stat = get_region_scans_data(region, matrix, &data);
if (stat == Ok)
{
*count = data->rdh.nCount;
rects = (RECT*)&data->Buffer;
if (scans)
{
for (i=0; i<data->rdh.nCount; i++)
{
scans[i].X = rects[i].left;
scans[i].Y = rects[i].top;
scans[i].Width = rects[i].right - rects[i].left;
scans[i].Height = rects[i].bottom - rects[i].top;
}
}
GdipFree(data);
}
return Ok;
}
GpStatus WINGDIPAPI GdipGetRegionScans(GpRegion *region, GpRectF *scans, INT *count, GpMatrix *matrix)
{
GpStatus stat;
INT i;
LPRGNDATA data;
RECT *rects;
if (!region || !count || !matrix)
return InvalidParameter;
stat = get_region_scans_data(region, matrix, &data);
if (stat == Ok)
{
*count = data->rdh.nCount;
rects = (RECT*)&data->Buffer;
if (scans)
{
for (i=0; i<data->rdh.nCount; i++)
{
scans[i].X = rects[i].left;
scans[i].Y = rects[i].top;
scans[i].Width = rects[i].right - rects[i].left;
scans[i].Height = rects[i].bottom - rects[i].top;
}
}
GdipFree(data);
}
return Ok;
}
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