From eb8f6521a3f13832ee63705b0338d3902d3ce9b9 Mon Sep 17 00:00:00 2001
From: sigonasr2 <sigonasr2@gmail.com>
Date: Thu, 27 Feb 2020 14:09:23 +0900
Subject: [PATCH] Create canvasUtils.js

---
 canvasUtils.js | 119 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 canvasUtils.js

diff --git a/canvasUtils.js b/canvasUtils.js
new file mode 100644
index 0000000..d7f1e47
--- /dev/null
+++ b/canvasUtils.js
@@ -0,0 +1,119 @@
+function loadImage(url) {
+	var img = new Image();
+	img.src = url;
+	return img;
+}
+
+function key_is_pressed(a) {
+	return keysDown.indexOf(a)!=-1;
+}
+
+function mouse_button_is_pressed(a) {
+	/*
+		"LEFT"
+		"RIGHT"
+		"MIDDLE"
+		"MOUSE4"
+		"MOUSE5"
+	*/
+	return mouseDown.indexOf(a)!=-1;
+}
+
+function instance_create(object) {
+	gameObjs.push(object);
+}
+
+function setGameSpeed(fps) {
+	setInterval(onGameUpdate,1000/fps);
+}
+
+function resetTransform() {
+	con.setTransform(1,0,0,1,0,0);
+}
+
+function transformScale(w,h) {
+	con.scale(w,h);
+}
+
+function transformRotate(degrees) {
+	con.rotate(degrees*Math.PI/180);
+}
+
+function transformTranslate(x,y) {
+	con.translate(x,y);
+}
+
+function getStringWidth(text) {
+	return con.measureText(text).width;
+}
+
+function drawSprite(x,y,sprite) {
+	con.drawImage(sprite,x,y);
+}
+
+function drawSpriteExt(x,y,sprite,w,h) {
+	con.drawImage(sprite,x,y,w*sprite.width,h*sprite.height);
+}
+
+function drawSpritePart(x,y,sprite,spritex,spritey,spritew,spriteh,w,h) {
+	con.drawImage(sprite,spritex,spritey,spritew,spriteh,x,y,w,h);
+}
+
+function drawText(x,y,text) {
+	con.fillText(text,x,y);
+}
+
+function setBackgroundColor(color) {
+	drawSetColor(color);
+	con.fillRect(0,0,canvas.width,canvas.height);
+}
+
+function drawSetAlpha(alpha) {
+	con.globalAlpha = alpha;
+}
+
+function drawSetFont(font) {
+	//font should be in JS style: "30px Arial"
+	//https://www.w3schools.com/tags/canvas_font.asp
+	con.font = font;
+}
+
+function drawSetHAlign(align) {
+	//left,center,right
+	con.textAlign = align;
+}
+function drawSetVAlign(align) {
+	//top,bottom,middle,alphabetic,hanging,ideographic
+	con.textBaseline = align;
+}
+
+function drawSetColor(color) {
+	con.strokeStyle = color;
+	con.fillStyle = color;
+}
+
+function drawLine(x1,y1,x2,y2) {
+	con.moveTo(x1,y1);
+	con.lineTo(x2,y2);
+	con.stroke();
+}
+
+function drawRectangle(x1,y1,x2,y2,outline) {
+	con.beginPath();
+	con.rect(x1,y1,x2,y2);
+	if (outline) {
+		con.stroke();
+	} else {
+		con.fill();
+	}
+}
+
+function drawCircle(x,y,r,outline) {
+	con.beginPath();
+	con.arc(x,y,r,0,2*Math.PI);
+	if (outline) {
+		con.stroke();
+	} else {
+		con.fill();
+	}
+}