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gdiplus: Add utility function get_visible_clip_region.

This commit is contained in:
Andrew Eikum 2009-08-26 18:03:08 -05:00 committed by Alexandre Julliard
parent 650a0f3fdd
commit 39f6f491a6
1 changed files with 28 additions and 9 deletions
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37
dlls/gdiplus/graphics.c
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@ -1062,6 +1062,33 @@ static GpStatus get_graphics_bounds(GpGraphics* graphics, GpRectF* rect)
return Ok;
}
/* on success, rgn will contain the region of the graphics object which
* is visible after clipping has been applied */
static GpStatus get_visible_clip_region(GpGraphics *graphics, GpRegion *rgn)
{
GpStatus stat;
GpRectF rectf;
GpRegion* tmp;
if((stat = get_graphics_bounds(graphics, &rectf)) != Ok)
return stat;
if((stat = GdipCreateRegion(&tmp)) != Ok)
return stat;
if((stat = GdipCombineRegionRect(tmp, &rectf, CombineModeReplace)) != Ok)
goto end;
if((stat = GdipCombineRegionRegion(tmp, graphics->clip, CombineModeIntersect)) != Ok)
goto end;
stat = GdipCombineRegionRegion(rgn, tmp, CombineModeReplace);
end:
GdipDeleteRegion(tmp);
return stat;
}
GpStatus WINGDIPAPI GdipCreateFromHDC(HDC hdc, GpGraphics **graphics)
{
TRACE("(%p, %p)\n", hdc, graphics);
@ -3123,7 +3150,6 @@ GpStatus WINGDIPAPI GdipGetVisibleClipBounds(GpGraphics *graphics, GpRectF *rect
{
GpRegion *clip_rgn;
GpStatus stat;
GpRectF wnd_rect;
TRACE("(%p, %p)\n", graphics, rect);
@ -3133,18 +3159,11 @@ GpStatus WINGDIPAPI GdipGetVisibleClipBounds(GpGraphics *graphics, GpRectF *rect
if(graphics->busy)
return ObjectBusy;
/* get window bounds */
if((stat = get_graphics_bounds(graphics, &wnd_rect)) != Ok)
return stat;
/* intersect window and graphics clipping regions */
if((stat = GdipCreateRegion(&clip_rgn)) != Ok)
return stat;
if((stat = GdipCombineRegionRect(clip_rgn, &wnd_rect, CombineModeIntersect)) != Ok)
goto cleanup;
if((stat = GdipCombineRegionRegion(clip_rgn, graphics->clip, CombineModeIntersect)) != Ok)
if((stat = get_visible_clip_region(graphics, clip_rgn)) != Ok)
goto cleanup;
/* get bounds of the region */