Mercurial > molko
view molko-js/src/js-painter.c @ 190:5dc57029b9f1
molko-js: allow objects/parameters in Molko.Painter API
author | David Demelier <markand@malikania.fr> |
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date | Sat, 07 Nov 2020 10:16:38 +0100 |
parents | a5436e15898d |
children | 633a25df450e |
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/* * js-painter.c -- basic drawing routines (Javascript bindings) * * Copyright (c) 2020 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 <duktape.h> #include <core/painter.h> #include "js.h" #include "js-painter.h" static duk_ret_t js_painter_getColor(duk_context *ctx) { duk_push_number(ctx, painter_get_color()); return 1; } static duk_ret_t js_painter_setColor(duk_context *ctx) { painter_set_color(duk_require_number(ctx, 0)); return 0; } static duk_ret_t js_painter_new(duk_context *ctx) { if (!duk_is_constructor_call(ctx)) duk_error(ctx, DUK_ERR_TYPE_ERROR, "Painter must be new-constructed"); duk_push_this(ctx); duk_push_string(ctx, "color"); duk_push_c_function(ctx, js_painter_getColor, 0); duk_push_c_function(ctx, js_painter_setColor, 1); duk_def_prop(ctx, -4, DUK_DEFPROP_HAVE_GETTER | DUK_DEFPROP_HAVE_SETTER); return 0; } static duk_ret_t js_painter_clear(duk_context *ctx) { (void)ctx; painter_clear(); return 0; } static duk_ret_t js_painter_drawLine(duk_context *ctx) { int x1, y1, x2, y2; if (duk_get_top(ctx) == 4) { x1 = duk_require_int(ctx, 0); y1 = duk_require_int(ctx, 1); x2 = duk_require_int(ctx, 2); y2 = duk_require_int(ctx, 3); } else if (duk_get_top(ctx) == 1) { duk_require_object(ctx, 0); duk_get_prop_string(ctx, 0, "x1"); x1 = duk_require_int(ctx, -1); duk_get_prop_string(ctx, 0, "y1"); y1 = duk_require_int(ctx, -1); duk_get_prop_string(ctx, 0, "x2"); x2 = duk_require_int(ctx, -1); duk_get_prop_string(ctx, 0, "y2"); y2 = duk_require_int(ctx, -1); duk_pop_n(ctx, 4); } else return duk_error(ctx, DUK_ERR_ERROR, "Object or 4 numbers expected"); painter_draw_line(x1, y2, x2, y2); return 0; } static duk_ret_t js_painter_drawPoint(duk_context *ctx) { int x, y; if (duk_get_top(ctx) == 2) { x = duk_require_int(ctx, 0); y = duk_require_int(ctx, 1); } else if (duk_get_top(ctx) == 1) { duk_require_object(ctx, 0); duk_get_prop_string(ctx, 0, "x"); x = duk_require_int(ctx, -1); duk_get_prop_string(ctx, 0, "y"); y = duk_require_int(ctx, -1); duk_pop_n(ctx, 2); } else return duk_error(ctx, DUK_ERR_ERROR, "Object or 2 numbers expected"); painter_draw_point(x, y); return 0; } static duk_ret_t js_painter_drawRectangle(duk_context *ctx) { int x, y; unsigned int w, h; if (duk_get_top(ctx) == 4) { x = duk_require_int(ctx, 0); y = duk_require_int(ctx, 1); w = duk_require_uint(ctx, 2); h = duk_require_uint(ctx, 3); } else if (duk_get_top(ctx) == 1) { duk_require_object(ctx, 0); duk_get_prop_string(ctx, 0, "x"); x = duk_require_int(ctx, -1); duk_get_prop_string(ctx, 0, "y"); y = duk_require_int(ctx, -1); duk_get_prop_string(ctx, 0, "w"); w = duk_require_uint(ctx, -1); duk_get_prop_string(ctx, 0, "h"); h = duk_require_uint(ctx, -1); duk_pop_n(ctx, 4); } else return duk_error(ctx, DUK_ERR_ERROR, "Object or 4 numbers expected"); painter_draw_rectangle(x, y, w, h); return 0; } static duk_ret_t js_painter_drawCircle(duk_context *ctx) { int x, y; double r; if (duk_get_top(ctx) == 3) { x = duk_require_int(ctx, 0); y = duk_require_int(ctx, 1); r = duk_require_number(ctx, 2); } else if (duk_get_top(ctx) == 1) { duk_require_object(ctx, 0); duk_get_prop_string(ctx, 0, "x"); x = duk_require_int(ctx, -1); duk_get_prop_string(ctx, 0, "y"); y = duk_require_int(ctx, -1); duk_get_prop_string(ctx, 0, "r"); r = duk_require_number(ctx, -1); duk_pop_n(ctx, 3); } else return duk_error(ctx, DUK_ERR_ERROR, "Object or 3 numbers expected"); painter_draw_circle(x, y, r); return 0; } static duk_ret_t js_painter_present(duk_context *ctx) { (void)ctx; painter_present(); return 0; } static const duk_function_list_entry methods[] = { { "clear", js_painter_clear, 0 }, { "drawLine", js_painter_drawLine, DUK_VARARGS }, { "drawPoint", js_painter_drawPoint, DUK_VARARGS }, { "drawRectangle", js_painter_drawRectangle, DUK_VARARGS }, { "drawCircle", js_painter_drawCircle, DUK_VARARGS }, { "present", js_painter_present, 0 }, { NULL, NULL, 0 } }; void js_painter_load(struct js *js) { assert(js); duk_push_global_object(js->handle); duk_get_prop_string(js->handle, -1, "Molko"); duk_push_c_function(js->handle, js_painter_new, 0); duk_push_object(js->handle); duk_put_function_list(js->handle, -1, methods); duk_put_prop_string(js->handle, -2, "prototype"); duk_put_prop_string(js->handle, -2, "Painter"); duk_pop_n(js->handle, 2); }