diff options
author | quou <quou@disroot.org> | 2024-09-23 21:11:29 +1000 |
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committer | quou <quou@disroot.org> | 2024-09-23 21:11:29 +1000 |
commit | 259237fae792e8f19d9b7920b2354f75bc1789e2 (patch) | |
tree | af079430f30f7df1b76efc4f96f520b0b6eee0af /rect.c |
initial commit, basic platform and rendering code.
Diffstat (limited to 'rect.c')
-rw-r--r-- | rect.c | 85 |
1 files changed, 85 insertions, 0 deletions
@@ -0,0 +1,85 @@ +#include "rect.h" + +Rect* rect_clip(Rect* r, const Rect* c) { + int n; + if ((n = c->x - r->x) > 0) { + r->w -= n; + r->x += n; + } + if ((n = c->y - r->y) > 0) { + r->h -= n; + r->y += n; + } + if ((n = r->x + r->w - (c->x + c->w)) > 0) + r->w -= n; + if ((n = r->y + r->h - (c->y + c->h)) > 0) + r->h -= n; + return r; +} + +Rect* rect_clipr(Rect* r, const int* c) { + int n; + if ((n = c[0] - r->x) > 0) { + r->w -= n; + r->x += n; + } + if ((n = c[1] - r->y) > 0) { + r->h -= n; + r->y += n; + } + if ((n = r->x + r->w - c[2]) > 0) + r->w -= n; + if ((n = r->y + r->h - c[3]) > 0) + r->h -= n; + return r; +} + +Rect* rect_clips(Rect* r, Rect* s, const Rect* c) { + int n; + if ((n = c->x - r->x) > 0) { + r->w -= n; + r->x += n; + s->w -= n; + s->x += n; + } + if ((n = c->y - r->y) > 0) { + r->h -= n; + r->y += n; + s->h -= n; + s->y += n; + } + if ((n = r->x + r->w - (c->x + c->w)) > 0) { + r->w -= n; + s->w -= n; + } + if ((n = r->y + r->h - (c->y + c->h)) > 0) { + r->h -= n; + s->h -= n; + } + return r; +} + +Rect* rect_clipsr(Rect* r, Rect* s, const int* c) { + int n; + if ((n = c[0] - r->x) > 0) { + r->w -= n; + r->x += n; + s->w -= n; + s->x += n; + } + if ((n = c[1] - r->y) > 0) { + r->h -= n; + r->y += n; + s->h -= n; + s->y += n; + } + if ((n = r->x + r->w - c[2]) > 0) { + r->w -= n; + s->w -= n; + } + if ((n = r->y + r->h - c[3]) > 0) { + r->h -= n; + s->h -= n; + } + return r; +} |