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/*
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Chris Wilson <chris@chris-wilson.co.uk>
*
*/
#ifndef FBCLIP_H
#define FBCLIP_H
extern const BoxRec *
fbClipBoxes(const RegionRec *region, const BoxRec *box, const BoxRec **end);
inline static bool
box_intersect(BoxPtr a, const BoxRec *b)
{
if (a->x1 < b->x1)
a->x1 = b->x1;
if (a->x2 > b->x2)
a->x2 = b->x2;
if (a->y1 < b->y1)
a->y1 = b->y1;
if (a->y2 > b->y2)
a->y2 = b->y2;
return a->x1 < a->x2 && a->y1 < a->y2;
}
#define run_box(b, c) \
DBG(("%s: box=(%d, %d), (%d, %d), clip=(%d, %d), (%d, %d)\n", \
__FUNCTION__, (b)->x1, (b)->y1, (b)->x2, (b)->y2, (c)->x1, (c)->y1, (c)->x2, (c)->y2)); \
if ((b)->y2 <= (c)->y1) break; \
if ((b)->x1 >= (c)->x2) continue; \
if ((b)->x2 <= (c)->x1) { if ((b)->y2 <= (c)->y2) break; continue; }
static inline void
fbDrawableRun(DrawablePtr d, GCPtr gc, const BoxRec *box,
void (*func)(DrawablePtr, GCPtr, const BoxRec *b, void *data),
void *data)
{
const BoxRec *c, *end;
for (c = fbClipBoxes(gc->pCompositeClip, box, &end); c != end; c++) {
BoxRec b;
run_box(box, c);
b = *box;
if (box_intersect(&b, c))
func(d, gc, &b, data);
}
}
static inline void
fbDrawableRunUnclipped(DrawablePtr d, GCPtr gc, const BoxRec *box,
void (*func)(DrawablePtr, GCPtr, const BoxRec *b, void *data),
void *data)
{
const BoxRec *c, *end;
for (c = fbClipBoxes(gc->pCompositeClip, box, &end); c != end; c++) {
run_box(box, c);
func(d, gc, c, data);
}
}
#endif /* FBCLIP_H */
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