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libcopybit: Add copybit iterator.

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Add the copybit iterator which takes a single rectangle as an input.

Change-Id: I6fd496450c29ed06ffbfad62b5c880e837450791
This commit is contained in:
Naomi Luis 2011-11-29 16:00:36 -08:00
parent 8994068ce6
commit f79ec0f398
1 changed files with 57 additions and 0 deletions
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57
libcopybit/copybit_priv.h Normal file
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/*
* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Code Aurora Forum, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <copybit.h>
struct copybit_iterator : public copybit_region_t {
copybit_iterator(const copybit_rect_t& rect) {
mRect = rect;
mCount = 1;
this->next = iterate;
}
private:
static int iterate(copybit_region_t const * self, copybit_rect_t* rect) {
if (!self || !rect) {
return 0;
}
copybit_iterator const* me = static_cast<copybit_iterator const*>(self);
if (me->mCount) {
rect->l = me->mRect.l;
rect->t = me->mRect.t;
rect->r = me->mRect.r;
rect->b = me->mRect.b;
me->mCount--;
return 1;
}
return 0;
}
copybit_rect_t mRect;
mutable int mCount;
};