Mercurial > molko
view src/libmlk-core/core/drawable-stack.c @ 368:15bdac29ba4b
core: split drawable and drawable_stack
author | David Demelier <markand@malikania.fr> |
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date | Sun, 24 Oct 2021 17:07:20 +0200 |
parents | |
children | 460c78706989 |
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/* * drawable-stack.c -- convenient stack of drawables * * Copyright (c) 2020-2021 David Demelier <markand@malikania.fr> * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <assert.h> #include <string.h> #include "drawable.h" #include "drawable-stack.h" #define DRAWABLE_FOREACH(st, iter) \ for (size_t i = 0; i < DRAWABLE_STACK_MAX && ((iter) = (st)->objects[i], 1); ++i) void drawable_stack_init(struct drawable_stack *st) { assert(st); memset(st, 0, sizeof (*st)); } int drawable_stack_add(struct drawable_stack *st, struct drawable *dw) { assert(st); assert(dw); for (size_t i = 0; i < DRAWABLE_STACK_MAX; ++i) { if (!st->objects[i]) { st->objects[i] = dw; return 0; } } return -1; } int drawable_stack_update(struct drawable_stack *st, unsigned int ticks) { assert(st); for (size_t i = 0; i < DRAWABLE_STACK_MAX; ++i) { struct drawable *dw = st->objects[i]; if (dw && drawable_update(dw, ticks)) { drawable_end(dw); drawable_finish(dw); st->objects[i] = NULL; } } /* * We process the array again in case a drawable added a new drawable * within the update function. */ return drawable_stack_completed(st); } void drawable_stack_draw(struct drawable_stack *st) { assert(st); struct drawable *dw; DRAWABLE_FOREACH(st, dw) if (dw) drawable_draw(dw); } int drawable_stack_completed(const struct drawable_stack *st) { assert(st); struct drawable *dw; DRAWABLE_FOREACH(st, dw) if (dw) return 0; return 1; } void drawable_stack_finish(struct drawable_stack *st) { assert(st); struct drawable *dw; DRAWABLE_FOREACH(st, dw) { if (dw) { drawable_end(dw); drawable_finish(dw); } } memset(st, 0, sizeof (*st)); }