/* * 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 * */ #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; } 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; if (box->x1 >= c->x2) continue; if (box->x2 <= c->x1) { if (box->y2 <= c->y2) break; else continue; } 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++) { if (box->x1 >= c->x2) continue; if (box->x2 <= c->x1) { if (box->y2 <= c->y2) break; else continue; } func(d, gc, c, data); } } #endif /* FBCLIP_H */