83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
/*
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* Copyright (C) 2014 Glyptodon LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "config.h"
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#include "guac_rect.h"
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void guac_common_rect_init(guac_common_rect* rect, int x, int y, int width, int height) {
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rect->x = x;
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rect->y = y;
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rect->width = width;
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rect->height = height;
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}
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void guac_common_rect_extend(guac_common_rect* rect, const guac_common_rect* min) {
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/* Calculate extents of existing dirty rect */
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int left = rect->x;
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int top = rect->y;
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int right = left + rect->width;
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int bottom = top + rect->height;
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/* Calculate missing extents of given new rect */
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int min_left = min->x;
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int min_top = min->y;
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int min_right = min_left + min->width;
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int min_bottom = min_top + min->height;
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/* Update minimums */
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if (min_left < left) left = min_left;
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if (min_top < top) top = min_top;
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if (min_right > right) right = min_right;
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if (min_bottom > bottom) bottom = min_bottom;
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/* Commit rect */
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guac_common_rect_init(rect, left, top, right - left, bottom - top);
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}
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void guac_common_rect_constrain(guac_common_rect* rect, const guac_common_rect* max) {
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/* Calculate extents of existing dirty rect */
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int left = rect->x;
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int top = rect->y;
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int right = left + rect->width;
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int bottom = top + rect->height;
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/* Calculate missing extents of given new rect */
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int max_left = max->x;
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int max_top = max->y;
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int max_right = max_left + max->width;
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int max_bottom = max_top + max->height;
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/* Update maximums */
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if (max_left > left) left = max_left;
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if (max_top > top) top = max_top;
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if (max_right < right) right = max_right;
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if (max_bottom < bottom) bottom = max_bottom;
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/* Commit rect */
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guac_common_rect_init(rect, left, top, right - left, bottom - top);
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}
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