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87aac8cf03
We avoid rendering any area that has not changed since the buffer was used and also not covered by an overlay.
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/**
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* Looking Glass
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* Copyright (C) 2017-2021 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _H_LG_UTIL_
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#define _H_LG_UTIL_
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#include <stdlib.h>
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#include <stdbool.h>
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#include "common/types.h"
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#define min(a,b) ({ __typeof__ (a) _a = (a); __typeof__ (b) _b = (b); _a < _b ? _a : _b; })
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#define max(a,b) ({ __typeof__ (a) _a = (a); __typeof__ (b) _b = (b); _a > _b ? _a : _b; })
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#define UPCAST(type, x) \
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(type *)((uintptr_t)(x) - offsetof(type, base))
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// reads the specified file into a new buffer
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// the callee must free the buffer
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bool util_fileGetContents(const char * filename, char ** buffer, size_t * length);
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void util_cursorToInt(double ex, double ey, int *x, int *y);
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bool util_guestCurToLocal(struct DoublePoint *local);
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void util_localCurToGuest(struct DoublePoint *guest);
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void util_rotatePoint(struct DoublePoint *point);
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bool util_hasGLExt(const char * exts, const char * ext);
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int util_mergeOverlappingRects(FrameDamageRect * rects, int count);
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static inline double util_clamp(double x, double min, double max)
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{
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if (x < min) return min;
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if (x > max) return max;
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return x;
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}
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char * util_getUIFont(const char * fontName);
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#endif
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