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implemented a client side (and very slow) version of BView::ClipToPicture. See bug #1397

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27321 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stefano Ceccherini
2008-09-04 13:59:41 +00:00
parent c0c7a73dbe
commit 3d2516cb5f
1 changed files with 56 additions and 0 deletions
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src/kits/interface/View.cpp
+56
View File
@@ -4394,6 +4394,61 @@ BView::_ClipToPicture(BPicture *picture, BPoint where,
if (!picture)
return;
#if 1
// TODO: Move the implementation to the server!!!
// Here the idea is to get rid of the padding bytes in the bitmap,
// as padding complicates and slows down the iteration.
// TODO: Maybe it's not so nice as it assumes BBitmaps to be aligned
// to a 4 byte boundary.
BRect bounds(Bounds());
if ((bounds.IntegerWidth() + 1) % 32)
bounds.right = bounds.left + ((bounds.IntegerWidth() + 1) / 32 + 1) * 32 - 1;
// TODO: I used a RGBA32 bitmap because drawing on a GRAY8 doesn't work.
BBitmap *bitmap = new BBitmap(bounds, B_RGBA32, true);
if (bitmap && bitmap->InitCheck() == B_OK && bitmap->Lock()) {
BView *view = new BView(bounds, "drawing view", B_FOLLOW_NONE, 0);
bitmap->AddChild(view);
view->DrawPicture(picture, where);
view->Sync();
bitmap->Unlock();
}
BRegion region;
int32 width = bounds.IntegerWidth() + 1;
int32 height = bounds.IntegerHeight() + 1;
if (bitmap->LockBits() == B_OK) {
uint32 bit = 0;
uint32 *bits = (uint32 *)bitmap->Bits();
clipping_rect rect;
// TODO: A possible optimization would be adding "spans" instead
// of 1x1 rects. That would probably help with very complex
// BPictures
for (int32 y = 0; y < height; y++) {
for (int32 x = 0; x < width; x++) {
bit = *bits++;
if (bit != (uint32)-1) {
rect.left = x;
rect.right = rect.left;
rect.top = rect.bottom = y;
region.Include(rect);
}
}
}
bitmap->UnlockBits();
}
delete bitmap;
if (invert) {
BRegion inverseRegion;
inverseRegion.Include(Bounds());
inverseRegion.Exclude(&region);
ConstrainClippingRegion(&inverseRegion);
} else
ConstrainClippingRegion(&region);
#else
if (_CheckOwnerLockAndSwitchCurrent()) {
fOwner->fLink->StartMessage(AS_VIEW_CLIP_TO_PICTURE);
fOwner->fLink->Attach<int32>(picture->Token());
@@ -4409,6 +4464,7 @@ BView::_ClipToPicture(BPicture *picture, BPoint where,
}
fState->archiving_flags |= B_VIEW_CLIP_REGION_BIT;
#endif
}