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WIP

main
Isaiah Odhner 2019-10-01 10:57:15 -04:00
parent 57057611be
commit 5795c897fb
1 changed files with 8 additions and 8 deletions
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16
src/functions.js
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@ -14,10 +14,10 @@ function update_helper_layer() {
var hctx = hcanvas.ctx;
var margin = 50;
var viewport_width = Math.min($canvas_area.width() + margin, canvas.width * magnification);
var viewport_height = Math.min($canvas_area.height() + margin, canvas.height * magnification);
var viewport_x = Math.max($canvas_area.scrollLeft() - margin, 0);
var viewport_y = Math.max($canvas_area.scrollTop() - margin, 0);
var viewport_width = Math.min($canvas_area.width() / magnification + margin*2, canvas.width);
var viewport_height = Math.min($canvas_area.height() / magnification + margin*2, canvas.height);
var viewport_x = Math.max($canvas_area.scrollLeft() / magnification - margin, 0);
var viewport_y = Math.max($canvas_area.scrollTop() / magnification - margin, 0);
// console.log($canvas_area.width(), $canvas_area.height(), viewport_width, viewport_height);
var resolution_width = Math.floor(viewport_width);
var resolution_height = Math.floor(viewport_height);
@ -28,11 +28,11 @@ function update_helper_layer() {
hcanvas.width = resolution_width;
hcanvas.height = resolution_height;
hcanvas.ctx.disable_image_smoothing();
helper_layer.width = Math.floor(viewport_width / scale);
helper_layer.height = Math.floor(viewport_height / scale);
helper_layer.width = Math.floor(viewport_width);
helper_layer.height = Math.floor(viewport_height);
}
helper_layer.x = Math.floor(viewport_x / magnification);
helper_layer.y = Math.floor(viewport_y / magnification);
helper_layer.x = Math.floor(viewport_x);
helper_layer.y = Math.floor(viewport_y);
helper_layer.position();
hctx.clearRect(0, 0, hcanvas.width, hcanvas.height);