diff molko-js/src/js-font.c @ 189:a5436e15898d

molko-js: start Javascript bindings, continue #2503 @4h - Added basic API for the libcore library, - Added a window example.
author David Demelier <markand@malikania.fr>
date Fri, 06 Nov 2020 15:15:01 +0100
parents
children dd77bfb38df2
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/molko-js/src/js-font.c	Fri Nov 06 15:15:01 2020 +0100
@@ -0,0 +1,165 @@
+/*
+ * js-font.c -- basic font management (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/alloc.h>
+#include <core/error.h>
+#include <core/font.h>
+#include <core/texture.h>
+
+#include "js-font.h"
+#include "js-texture.h"
+#include "js.h"
+#include "js_p.h"
+
+#define SYMBOL  DUK_HIDDEN_SYMBOL("molko::font")
+#define PROTO   DUK_HIDDEN_SYMBOL("molko::font::prototype")
+
+static struct font *
+js_font_this(duk_context *ctx)
+{
+	struct font *font;
+
+	duk_push_this(ctx);
+	duk_get_prop_string(ctx, -1, SYMBOL);
+	font = duk_to_pointer(ctx, -1);
+	duk_pop_n(ctx, 2);
+
+	if (!font)
+		duk_error(ctx, DUK_ERR_TYPE_ERROR, "Not a Font object");
+
+	return font;
+}
+
+static duk_ret_t
+js_font_getHeight(duk_context *ctx)
+{
+	duk_push_uint(ctx, font_height(js_font_this(ctx)));
+
+	return 1;
+}
+
+static duk_ret_t
+js_font_fromPath(duk_context *ctx)
+{
+	struct font font;
+	const char *path = duk_require_string(ctx, 0);
+	unsigned int size = duk_require_uint(ctx, 1);
+
+	if (!font_open(&font, path, size))
+		duk_error(ctx, DUK_ERR_ERROR, "%s", error());
+
+	duk_push_object(ctx);
+	duk_push_global_stash(ctx);
+	duk_get_prop_string(ctx, -1, PROTO);
+	duk_remove(ctx, -2);
+	duk_push_pointer(ctx, alloc_dup(&font, sizeof (font)));
+	duk_put_prop_string(ctx, -3, SYMBOL);
+	duk_set_prototype(ctx, -2);
+	duk_push_string(ctx, "height");
+	duk_push_c_function(ctx, js_font_getHeight, 0);
+	duk_def_prop(ctx, -3, DUK_DEFPROP_HAVE_GETTER);
+	
+	return 1;
+}
+
+static duk_ret_t
+js_font_render(duk_context *ctx)
+{
+	struct font *font = js_font_this(ctx);
+	struct texture tex;
+	const char *text = duk_require_string(ctx, 0);
+	unsigned long color = duk_require_number(ctx, 1);
+
+	if (!font_render(font, &tex, text, color))
+		duk_error(ctx, DUK_ERR_ERROR, "%s", error());
+
+	js_texture_push(js_self(ctx), &tex);
+
+	return 1;
+}
+
+static duk_ret_t
+js_font_query(duk_context *ctx)
+{
+	struct font *font = js_font_this(ctx);
+	const char *text = duk_require_string(ctx, 0);
+	unsigned int w, h;
+
+	if (!font_query(font, text, &w, &h))
+		duk_error(ctx, DUK_ERR_ERROR, "%s", error());
+
+	duk_push_object(ctx);
+	duk_push_uint(ctx, w);
+	duk_put_prop_string(ctx, -2, "w");
+	duk_push_uint(ctx, h);
+	duk_put_prop_string(ctx, -2, "h");
+
+	return 1;
+}
+
+static duk_ret_t
+js_font_finish(duk_context *ctx)
+{
+	struct font *font;
+
+	duk_get_prop_string(ctx, 0, SYMBOL);
+	font = duk_to_pointer(ctx, -1);
+	duk_pop(ctx);
+	duk_del_prop_string(ctx, 0, SYMBOL);
+
+	if (font) {
+		font_finish(font);
+		free(font);
+	}
+
+	return 0;
+}
+
+static const duk_function_list_entry functions[] = {
+	{ "fromPath",   js_font_fromPath,       2 },
+	{ NULL,         NULL,                   0 }
+};
+
+static const duk_function_list_entry methods[] = {
+	{ "render",     js_font_render,         2 },
+	{ "query",      js_font_query,          1 },
+	{ NULL, NULL, 0 }
+};
+
+void
+js_font_load(struct js *js)
+{
+	assert(js);
+
+	duk_push_global_object(js->handle);
+	duk_get_prop_string(js->handle, -1, "Molko");
+	duk_push_object(js->handle);
+	duk_put_function_list(js->handle, -1, functions);
+	duk_put_prop_string(js->handle, -2, "Font");
+	duk_push_global_stash(js->handle);
+	duk_push_object(js->handle);
+	duk_put_function_list(js->handle, -1, methods);
+	duk_push_c_function(js->handle, js_font_finish, 1);
+	duk_set_finalizer(js->handle, -2);
+	duk_put_prop_string(js->handle, -2, PROTO);
+	duk_pop_n(js->handle, 3);
+}