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drawCanvas.js
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let use_webgl = true
let ctx = null;
let canvas = null;
let offscreenContext = null;
let cameraOffset = { x:0, y: 0 }
let previousCameraOffset = { x:0, y: 0 }
let cameraOffsetMin = { x:0, y: 0 }
let cameraOffsetMax = { x:0, y: 0 }
let cameraZoom = 0.5
let previousZoom = 1
let MAX_ZOOM = 2
let MIN_ZOOM = 0.2
let SCROLL_SENSITIVITY = 0.0005
let timed_effects = {};
const _PRG = document.getElementById('p'), _OUT = document.querySelector('[for=p]'), K = 5, TMAX = K*_PRG.max;
let double_tap_time = null;
let start_time_image_load = 0
let loading_progress = 0
let complete_layer_amount = -1
let completely_loaded = false
let layer_redraw_progress = -1;
let current_rendering_run_start = null;
let redo_cache = false
let redo_canvas = false
let schedule_draw = false
let draw_in_progress = false
let layerSize = { x: 0, y: 0}
let project_metadata = null;
let selected_layer = -1;
let layers = []
let layer_click = []
let layer_area = []
let layer_border = []
let layer_info = []
let layer_visibility_copy = []
let layer_opacity = []
let layers_loaded = 0
let layer_click_loaded = 0
let layer_area_loaded = 0
let layer_border_loaded = 0
let layer_info_loaded = 0
let layer_opacity_loaded = 0
let datapath = null
let mobile = null;
function detectMob() {
const toMatch = [
/Android/i,
/webOS/i,
/iPhone/i,
/iPad/i,
/iPod/i,
/BlackBerry/i,
/Windows Phone/i
];
return toMatch.some((toMatchItem) => {
return navigator.userAgent.match(toMatchItem);
});
}
function is_mobile(){
if (mobile == null) {
mobile = detectMob();
}
return mobile;
}
function formatTime(unix_timestamp) {
let date = new Date(unix_timestamp);
let datestring = ("0" + date.getDate()).slice(-2) + "." + ("0"+(date.getMonth()+1)).slice(-2) + "." +
date.getFullYear() + " " + ("0" + date.getHours()).slice(-2) + ":" + ("0" + date.getMinutes()).slice(-2);
return datestring;
}
function formatBytes(bytes, decimals = 2) {
if (bytes === 0) return '0 Bytes';
const k = 1024;
const dm = decimals < 0 ? 0 : decimals;
const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
const i = Math.floor(Math.log(bytes) / Math.log(k));
return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
}
function get_image_name() {
let url_string = window.location.href;
console.log(url_string)
let url = new URL(url_string);
//%20 for spaces in URL
console.log(url.searchParams.get("image"));
}
function get_pixel_value(canvas, x, y) {
if (use_webgl) {
let context = enableWebGLCanvas( canvas );
context.start2D();
data = context.getImageData(x, y, 1, 1).data;
context.finish2D();
return data
}else{
return canvas.getContext('2d').getImageData(x, y, 1, 1).data;
}
}
function _create_layers() {
let main_view = document.getElementById('main_view');
let image_container = document.createElement('div');
image_container.id = 'image_container';
console.log("ZOOM: "+cameraZoom)
console.log(cameraZoom * layerSize.x);
image_container.style.width = (cameraZoom * layerSize.x)+"px";
image_container.style.height = (cameraZoom * layerSize.y)+"px";
main_view.appendChild(image_container);
let rect = image_container.getBoundingClientRect();
console.log(rect.top, rect.right, rect.bottom, rect.left);
for (let i = 0; i < layer_amount; i++) {
let layer_image = document.createElement('div');
layer_image.id = 'layer_'+i;
layer_image.classList.add('layer');
layer_image.style.background = "url("+datapath+"/"+i+".png)";
layer_image.style.backgroundSize = "100% 100%";
layer_image.style.zIndex = -100 - 2*(layer_amount-i);
if (layer_info[i].visible) {
layer_image.style.opacity = layer_info[i].opacity / 255;
}else {
layer_image.style.opacity = 0;
}
layer_image.style.mixBlendMode = "normal"; //for now :)
//layer_image.style.aspectRatio = layer_info[i].x + " / " + layer_info[i].y;
layer_image.style.aspectRatio = layerSize.x + " / " + layerSize.y;
image_container.appendChild(layer_image);
let layer_image_alpha = document.createElement('div');
layer_image_alpha.id = 'layer_b_'+i;
layer_image_alpha.classList.add('layer');
layer_image_alpha.style.background = "url("+datapath+"/"+i+"_b.png)";
layer_image_alpha.style.backgroundSize = "100% 100%";
layer_image_alpha.style.zIndex = -101 - 2*(layer_amount-i);
layer_image_alpha.style.opacity = 0;
layer_image_alpha.style.mixBlendMode = "normal"; //for now :)
//layer_image_alpha.style.aspectRatio = layer_info[i].x + " / " + layer_info[i].y;
layer_image_alpha.style.aspectRatio = layerSize.x + " / " + layerSize.y;
image_container.appendChild(layer_image_alpha);
}
/*
context.globalAlpha = js.opacity / 255;
blendMode = js.blendMode;
switch(blendMode) {
case "0": context.globalCompositeOperation = "source-over"; break; //Normal
case "1": context.globalCompositeOperation = "multiply"; break; //Multiply
case "2": context.globalCompositeOperation = "lighter"; break; //Additive
case "3": context.globalCompositeOperation = "color-burn"; break; //ColorBurn !NOT THE SAME!
case "4": context.globalCompositeOperation = "color-dodge"; break; //ColorDodge !NOT THE SAME!
case "5": context.globalCompositeOperation = "screen"; break; //Reflect !NOT THE SAME!
case "6": context.globalCompositeOperation = "lighten"; break; //Glow !NOT THE SAME!
case "7": context.globalCompositeOperation = "overlay"; break; //Overlay
case "8": context.globalCompositeOperation = "difference"; break; //Difference
case "9": context.globalCompositeOperation = "exclusion"; break; //Negation !SOMEWHAT WRONG!
case "10": context.globalCompositeOperation = "lighten"; break; //Lighten
case "11": context.globalCompositeOperation = "darken"; break; //Darken
case "12": context.globalCompositeOperation = "screen"; break; //Screen
case "13": context.globalCompositeOperation = "exclusion"; break; //XOR !SOMEWHAT WRONG!
}*/
}
function _focus_on_layer(id) {
let target_offset = {x: 0, y: 0};
let target_zoom = 0;
if (id >= 0 && id < layer_amount) {
console.log("Focus on layer: "+id);
bbox_center_x = (layer_info[id]["bounding_box"]["x_max"]+layer_info[id]["bounding_box"]["x_min"]) / 2;
bbox_center_y = (layer_info[id]["bounding_box"]["y_max"]+layer_info[id]["bounding_box"]["y_min"]) / 2;
if (layer_info[id]["bounding_box"]["x_max"]-layer_info[id]["bounding_box"]["x_min"] > 0 &&
layer_info[id]["bounding_box"]["y_max"]-layer_info[id]["bounding_box"]["y_min"] > 0){
target_zoom = Math.min(MAX_ZOOM, 0.85*Math.min(window.innerWidth / (layer_info[id]["bounding_box"]["x_max"]-layer_info[id]["bounding_box"]["x_min"]), window.innerHeight / (layer_info[id]["bounding_box"]["y_max"]-layer_info[id]["bounding_box"]["y_min"])));
target_offset.x = 0.5 * window.innerWidth + (1 - 2*(bbox_center_x / layerSize.x)) * 0.5 * layerSize.x * target_zoom; //parseInt(moving_canvas_container.style.width);
target_offset.y = 0.5 * window.innerHeight + (1 - 2*(bbox_center_y / layerSize.y)) * 0.5 * layerSize.y * target_zoom; //parseInt(moving_canvas_container.style.height);
}
}
if (target_zoom == 0) {
target_zoom = 0.85*Math.min(window.innerWidth / layerSize.x, window.innerHeight / layerSize.y)
target_offset = { x: window.innerWidth/2, y: window.innerHeight/2 }
}
let change_offset = {x: 0, y: 0};
change_offset.x = target_offset.x - cameraOffset.x;
change_offset.y = target_offset.y - cameraOffset.y;
let change_zoom = target_zoom - cameraZoom;
let original_zoom = cameraZoom;
let orig_position = {x: 0, y: 0}
orig_position.x = cameraOffset.x;
orig_position.y = cameraOffset.y;
steps = 0;
dist = 10*Math.log(Math.max(Math.abs(change_offset.x)+1, Math.abs(change_offset.y)+1))
zm = 20*Math.max(target_zoom / cameraZoom, cameraZoom / target_zoom);
console.log("Factors: ")
console.log(dist)
console.log(zm);
totalSteps = parseInt(Math.max(dist, zm));
//cameraOffset.x += change_offset.x;
//cameraOffset.y += change_offset.y;
//_update_position();
let sum = 0;
let moveEffect = setInterval(function () {
if (false) {
cameraOffset.x = target_offset.x
cameraOffset.y = target_offset.y
cameraZoom = target_zoom;
_update_zoom(offset_camera=false)
_update_position()
clearInterval(moveEffect)
}
if (steps < totalSteps+1) {
x = 3*(1 - 2*steps/totalSteps)
f = 0.5-0.5*Math.tanh(x)
x_p = 0
f_p = 0
if (steps > 0) {
x_p = 3*(1 - 2*(steps-1)/totalSteps)
f_p = 0.5-0.5*Math.tanh(x_p)
}
if (steps == totalSteps) {
f = 1
}
cameraOffset.x += change_offset.x * (f - f_p);
cameraOffset.y += change_offset.y * (f - f_p);
cameraZoom += change_zoom * (f - f_p);
steps++;
_update_zoom(offset_camera=false)
_update_position()
} else {
console.log("Focus done.")
clearInterval(moveEffect);
}
}, 10);
}
function _add_layers_to_side() {
let sidebar = document.getElementById('sidebar_layers');
sidebar.innerHTML = '';
for (let i = 0; i < layer_amount; i++) {
let div_layer = document.createElement('div');
div_layer.id = 'layer_element_' + i;
div_layer.value = i;
div_layer.classList.add('layer_element');
div_layer.addEventListener('dblclick', function (event) {
id = null;
if (event.target.classList.contains("layer_element")) {
id = parseInt(event.target.id.replace("layer_element_", ""))
}
if (event.target.classList.contains("layer_thumbnail")) {
id = parseInt(event.target.id.replace("layer_thumbnail_", ""))
}
if (event.target.classList.contains("layer_name_div")) {
id = parseInt(event.target.id.replace("layer_name_div_", ""))
}
if (id !== null) {
_focus_on_layer(id);
}
});
div_layer.addEventListener('click', function (event) {
// do something
id = null;
if (event.target.classList.contains("layer_element")) {
id = parseInt(event.target.id.replace("layer_element_", ""))
}
if (event.target.classList.contains("layer_thumbnail")) {
id = parseInt(event.target.id.replace("layer_thumbnail_", ""))
}
if (event.target.classList.contains("layer_name_div")) {
id = parseInt(event.target.id.replace("layer_name_div_", ""))
}
if (id !== null) {
console.log("Select layer: "+id)
deselectLayerSide(selected_layer);
selectLayerSide(id);
selected_layer = id;
}
});
sidebar.appendChild(div_layer);
let checkbox_div = document.createElement('div');
checkbox_div.classList.add('checkbox_div');
checkbox_div.id = 'checkbox_div_' + i;
div_layer.appendChild(checkbox_div);
let checkbox = document.createElement('input');
checkbox.type = "checkbox";
checkbox.name = "checkbox_"+i;
checkbox.value = i;
checkbox.id = "checkbox_"+i;
checkbox.classList.add('checkbox');
checkbox.checked = layer_info[i].visible;
checkbox.addEventListener('change', (event) => {
for (let i = 0; i < layer_amount; i++) {
layer_info[i].visible = document.getElementById('checkbox_'+i).checked;
//console.log(i+": "+layer_info[i].visible)
}
redo_cache = true;
requestAnimationFrame( draw );
})
checkbox_div.appendChild(checkbox);
let layer_thumbnail = document.createElement('div');
layer_thumbnail.id = 'layer_thumbnail_'+i;
layer_thumbnail.classList.add('layer_thumbnail');
layer_thumbnail.style.background = "url("+datapath+"/"+i+"_thumbnail.png)";
layer_thumbnail.style.backgroundSize = "100% 100%";
//layer_thumbnail.style.aspectRatio = layer_info[i].x + " / " + layer_info[i].y;
layer_thumbnail.style.aspectRatio = layerSize.x + " / " + layerSize.y;
div_layer.appendChild(layer_thumbnail);
let layer_name_div = document.createElement('div');
layer_name_div.id = 'layer_name_div_' + i;
layer_name_div.classList.add('layer_name_div');
layer_name_div.innerHTML = layer_info[i].name
//jQuery(layer_name_div).fitText();
div_layer.appendChild(layer_name_div);
}
}
function selectLayerSide(layer) {
if (layer >= 0 && layer <= layer_amount) {
let layer_side_element = document.getElementById('layer_element_'+layer);
let layer_thumbail_element = document.getElementById('layer_thumbnail_'+layer);
let moving_canvas_selection = document.getElementById('moving_canvas_selection');
moving_canvas_selection.style.background = "url("+datapath+"/"+layer+"_b.png)";
moving_canvas_selection.style.backgroundSize = "100% 100%";
moving_canvas_selection.style.aspectRatio = layerSize.x + " / " + layerSize.y;
//let layer_b_element = document.getElementById('layer_b_'+layer);
//layer_b_element.style.opacity = 1;
layer_side_element.style.borderColor = "red"
layer_side_element.style.background = "rgba(0, 0, 0, 0.5)"
layer_side_element.scrollIntoView({
behavior: 'smooth',
block: 'nearest',
inline: 'nearest'
});
}
}
function deselectLayerSide(layer) {
console.log("deselect "+layer);
if (layer >= 0 && layer <= layer_amount) {
let layer_element = document.getElementById('layer_element_'+layer);
let layer_thumbail_element = document.getElementById('layer_thumbnail_'+layer);
let moving_canvas_selection = document.getElementById('moving_canvas_selection');
moving_canvas_selection.style.background = "none";
//let layer_b_element = document.getElementById('layer_b_'+layer);
//layer_b_element.style.opacity = 0;
layer_element.style.borderColor = "black"
layer_element.style.background = "rgba(127, 127, 127, 0.5)"
}
}
function refreshSite() {
//overwrite changed layer_info values
for (let i = 0; i < layer_amount; i++) {
layer_info[i].visible = layer_visibility_copy[i]
}
//reset sidebar visibility checkboxes
for (let i = 0; i < layer_amount; i++) {
let checkbox = document.getElementById("checkbox_"+i);
checkbox.checked = layer_info[i].visible;
}
//clear selection
deselectLayerSide(selected_layer);
selected_layer = -1
//redraw
redo_cache = true;
requestAnimationFrame( draw );
//reset zoom
cameraZoom = 0.85*Math.min(window.innerWidth / layerSize.x, window.innerHeight / layerSize.y)
//reset cameraOffset
cameraOffset = { x: window.innerWidth/2, y: window.innerHeight/2 }
_update_zoom(offset_camera=false, null)
console.log("Reset to default.")
}
function is_fullscreen(){
return document.fullscreenElement != null;
}
function toggleFullscreen() {
console.log(is_fullscreen())
if (is_fullscreen()) {
document.exitFullscreen();
} else {
document.body.requestFullscreen();
}
}
function hideSidebar() {
let moveTarget = document.getElementById("sidebar");
if (parseFloat(moveTarget.style.left) >= 0) {
let moveEffect = setInterval(function () {
if (parseFloat(moveTarget.getBoundingClientRect().right) > 0) {
moveTarget.style.left = (parseFloat(moveTarget.style.left) - 10) + "px"
let hideSidebarIcon = document.getElementById("hideSidebarIcon");
let rect = hideSidebarIcon.getBoundingClientRect();
//console.log(rect.top, rect.right, rect.bottom, rect.left);
if (rect.left <= 0) {
let showSidebarIcon = document.getElementById("showSidebarIcon");
showSidebarIcon.style.opacity = 1
showSidebarIcon.style.zIndex = 5
hideSidebarIcon.style.opacity = 0
hideSidebarIcon.style.zIndex = -1
}
} else {
console.log("Sidebar hidden.")
clearInterval(moveEffect);
}
}, 10);
}
}
function showSidebar() {
let moveTarget = document.getElementById("sidebar");
if (parseFloat(moveTarget.getBoundingClientRect().right) <= 0) {
let moveEffect = setInterval(function () {
if (parseFloat(moveTarget.getBoundingClientRect().left) < 0) {
moveTarget.style.left = (parseFloat(moveTarget.style.left) + 10) + "px"
let hideSidebarIcon = document.getElementById("hideSidebarIcon");
let rect = hideSidebarIcon.getBoundingClientRect();
//console.log(rect.top, rect.right, rect.bottom, rect.left);
if (rect.left >= 0) {
let showSidebarIcon = document.getElementById("showSidebarIcon");
showSidebarIcon.style.opacity = 0
showSidebarIcon.style.zIndex = 1
hideSidebarIcon.style.opacity = 1
hideSidebarIcon.style.zIndex = 5
}
} else {
console.log("Sidebar shown.")
clearInterval(moveEffect);
}
}, 10);
}
}
function _display_title() {
let title = ids[id_selected].replaceAll("%20", " ");
let project_name = document.getElementById("project_name");
project_name.innerHTML = title;
project_name.style.opacity = 1;
_fade_out("project_name", fade_time=1, delay=5);
}
function _stop_effect(key, clear_function){
if (key in timed_effects){
console.log("Stop "+key);
clear_function(timed_effects[key]);
delete timed_effects[key];
}
}
function _clear_all_effects(){
for (k in Object.keys(timed_effects)){
if (k.endsWith("_timeout")) {
_stop_effect(k, clearTimeout);
}else if (k.endsWith("_interval")){
_stop_effect(k, clearInterval);
}
}
}
function _fade_out(target_div_name, fade_time=1.0, delay=0) {
let fadeTarget = document.getElementById(target_div_name);
fadeTarget.style.visibility = "visible";
let timeout_key = target_div_name+"_timeout";
let interval_key = target_div_name+"_interval";
_stop_effect(timeout_key, clearTimeout);
_stop_effect(interval_key, clearInterval);
setTimeout( function() {
delete timed_effects[timeout_key];
let fadeEffect = setInterval(function () {
if (!fadeTarget.style.opacity) {
fadeTarget.style.opacity = 1;
}
if (fadeTarget.style.opacity > 0) {
fadeTarget.style.opacity -= 10/(fade_time*1000);
} else {
console.log("Element hidden")
fadeTarget.style.opacity = 0;
fadeTarget.style.visibility = "hidden";
delete timed_effects[interval_key];
clearInterval(fadeEffect);
}
}, 10);
}, 1000*delay);
}
function load_status(path) {
return fetch(path+"/status.txt")
.then(function(response) {
let tmp = response.text();
return tmp; });
}
function load_json_metadata(path) {
return fetch(path+"/info.json")
.then(function(response) {
let tmp = response.json();
return tmp; });
}
async function load_image_json(path, id)
{
await (fetch(path+"/"+id+".json")
.then(response => response.json())
.then(json => layer_info[id] = json ));
}
function load_image(path, id)
{
let img = new Image(); // Create new img element
img.addEventListener('load', function() {
layers[id] = img;
//layerSize.x = img.width;
//layerSize.y = img.height;
layers_loaded += 1;
fully_loaded();
}, false);
img.src = path + "/" + id + ".png"; // Set source path
/*
let img2 = new Image();
img2.addEventListener('load', function() {
layer_click[id] = img2;
layer_click_loaded += 1;
fully_loaded();
}, false);
img2.src = path + "/" + id + "_r.png";
*/
let img3 = new Image();
img3.addEventListener('load', function() {
layer_border[id] = img3;
layer_border_loaded += 1;
fully_loaded();
}, false);
img3.src = path + "/" + id + "_b.png";
/*
let img4 = new Image();
img4.addEventListener('load', function() {
layer_area[id] = img4;
layer_area_loaded += 1;
fully_loaded();
}, false);
img4.src = path + "/" + id + "_a.png";
*/
let blob = null;
fetch(path + "/" + id +".blob")
.then(function(response) {
let tmp = response.blob();
return tmp; })
.then(function (blob)
{
let fr = new FileReader();
fr.onload = function() {
var data = fr.result;
var array = new Int8Array(data);
layer_opacity[id] = array;
layer_opacity_loaded += 1;
fully_loaded();
}
fr.readAsArrayBuffer(blob);
});
}
function fully_loaded() {
//loading_progress = parseInt( (layers_loaded + layer_click_loaded + layer_border_loaded + layer_area_loaded + layer_opacity_loaded) * 100 / (5 * complete_layer_amount) ) ;
loading_progress = parseInt( (layers_loaded + layer_border_loaded + layer_opacity_loaded) * 100 / (3 * complete_layer_amount) ) ;
_OUT.value = parseInt(loading_progress);
_PRG.value = loading_progress;
let fadeTarget = document.getElementById("loader");
fadeTarget.style.visibility = "visible";
if (complete_layer_amount <= layers_loaded &&
complete_layer_amount <= layer_border_loaded &&
complete_layer_amount <= layer_opacity_loaded) {
//if (complete_layer_amount <= layers_loaded && complete_layer_amount <= layer_click_loaded && complete_layer_amount <= layer_border_loaded && complete_layer_amount <= layer_area_loaded) {
_fully_loaded()
} else {
//requestAnimationFrame( draw ) //for updating the loading bar :S
}
}
function _fully_loaded() {
end_time_image_load = performance.now()
console.log(`Image-Load ${end_time_image_load - start_time_image_load} ms`)
console.log("Completely loaded!")
console.log("Fill sidebar.")
_add_layers_to_side()
//_create_layers()
console.log("Sidebar complete.")
//canvas.offscreenCanvas = document.createElement('canvas');
//canvas.clickCanvas = document.createElement('canvas');
//canvas.offscreenCanvas.width = layerSize.x
//canvas.offscreenCanvas.height = layerSize.y
//canvas.clickCanvas.width = layerSize.x
//canvas.clickCanvas.height = layerSize.y
cameraZoom = Math.min(window.innerWidth / layerSize.x, window.innerHeight / layerSize.y)
MIN_ZOOM = cameraZoom * 0.5
MAX_ZOOM = cameraZoom * 5
cameraZoom *= 0.85
_update_zoom(offset_camera=false, null);
_update_position();
completely_loaded = true
redo_cache = true
redraw_layer = true
//_fade_out("loader", 1, 1);
redo_cache = true
redo_canvas = true
requestAnimationFrame( draw );
_display_title();
}
function load_images(path)
{
datapath = path
load_json_metadata(path).then(function(metadata) {
layerSize.x = metadata.width
layerSize.y = metadata.height
project_metadata = metadata
console.log("Layer-Size:")
console.log(layerSize.x)
console.log(layerSize.y)
}).then(
load_status(path).then(function(amount_of_layers) {
console.log(""+amount_of_layers+" Layer");
layer_amount = parseInt(amount_of_layers);
console.log("Load json descriptors...")
json_promises = [];
var start_time_json_load = performance.now()
for (let i = 0; i < layer_amount; i++) {
json_promises.push(load_image_json(path, i));
}
Promise.all(json_promises).then(function() {
_update_info_container();
layer_visibility_copy = {};
for (let i=0; i < layer_amount; i++) {
layer_visibility_copy[i] = layer_info[i].visible;
}
var end_time_json_load = performance.now()
start_time_image_load = performance.now()
console.log(`JSON-Load ${end_time_json_load - start_time_json_load} ms`)
for (let i = 0; i < layer_amount; i++) {
console.log(i+": "+layer_info[i].name);
}
console.log("Json loaded. Load images...")
complete_layer_amount = layer_amount
for (let i = 0; i < layer_amount; i++) {
load_image(path, i);
}
});
})
);
}
/*function _draw_selection(index, context) {
if (index >= 0 && index < layer_amount) {
console.log("Draw selection "+index)
context.globalAlpha = 1.0;
context.globalCompositeOperation = "color";
context.drawImage(layer_border[index], 0, 0);
}
}*/
function _draw_layer(index, context){
js = layer_info[index]
if (typeof js !== 'undefined') {
if (js.visible) {
/*
click_context.globalCompositeOperation = "source-over";
click_context.globalAlpha = 1.0;
click_context.drawImage(layer_click[index], 0, 0);
area_context.globalCompositeOperation = "lighten";
area_context.globalAlpha = 1.0;
area_context.drawImage(layer_area[index], 0, 0);
*/
/*if (index == selected_layer) {
console.log("Draw selection "+selected_layer)
context.globalAlpha = 1.0;
context.globalCompositeOperation = "source-over";
context.drawImage(layer_border[index], 0, 0);
}*/
context.globalAlpha = js.opacity / 255;
/*blendMode = js.blendMode;
switch(blendMode) {
case "0": context.globalCompositeOperation = "source-over"; break; //Normal
case "1": context.globalCompositeOperation = "multiply"; break; //Multiply
case "2": context.globalCompositeOperation = "lighter"; break; //Additive
case "3": context.globalCompositeOperation = "color-burn"; break; //ColorBurn !NOT THE SAME!
case "4": context.globalCompositeOperation = "color-dodge"; break; //ColorDodge !NOT THE SAME!
case "5": context.globalCompositeOperation = "screen"; break; //Reflect !NOT THE SAME!
case "6": context.globalCompositeOperation = "lighten"; break; //Glow !NOT THE SAME!
case "7": context.globalCompositeOperation = "overlay"; break; //Overlay
case "8": context.globalCompositeOperation = "difference"; break; //Difference
case "9": context.globalCompositeOperation = "exclusion"; break; //Negation !SOMEWHAT WRONG!
case "10": context.globalCompositeOperation = "lighten"; break; //Lighten
case "11": context.globalCompositeOperation = "darken"; break; //Darken
case "12": context.globalCompositeOperation = "screen"; break; //Screen
case "13": context.globalCompositeOperation = "exclusion"; break; //XOR !SOMEWHAT WRONG!
}*/
//console.log("Draw")
context.drawImage(layers[index], 0, 0);
} else {
//console.log("Not visible")
}
}
}
function draw_layer(clear_canvas=false)
{
if (typeof canvas !== 'undefined') {
if (typeof canvas.offscreenCanvas === 'undefined' || canvas.offscreenCanvas == null) {
//canvas.offscreenCanvas = document.createElement('canvas');
canvas.offscreenCanvas = document.getElementById("moving_canvas");
/*canvas.offscreenCanvas = document.createElement('canvas');
canvas.offscreenCanvas.id = 'moving_canvas';
document.getElementById('moving_canvas_container').appendChild(canvas.offscreenCanvas);
console.log("GOT CANVAS")
console.log(canvas.offscreenCanvas)*/
}
if (layerSize.x != canvas.offscreenCanvas.width || layerSize.y != canvas.offscreenCanvas.height) {
canvas.offscreenCanvas.width = layerSize.x;
canvas.offscreenCanvas.height = layerSize.y;
if (offscreenContext != null) {
//console.log("GLINFO")
//console.log(offscreenContext)
//console.log(offscreenContext.viewport_data)
//offscreenContext.viewport_data = new Float32Array([0, 0, canvas.offscreenCanvas.width, canvas.offscreenCanvas.height]);
offscreenContext.reset();
//console.log(offscreenContext.viewport_data)
}
}
/*if (typeof canvas.clickCanvas === 'undefined') {
canvas.clickCanvas = document.createElement('canvas');
canvas.clickCanvas.width = layerSize.x
canvas.clickCanvas.height = layerSize.y
}
if (typeof canvas.areaCanvas === 'undefined') {
canvas.areaCanvas = document.createElement('canvas');
canvas.areaCanvas.width = layerSize.x
canvas.areaCanvas.height = layerSize.y
}*/
if (use_webgl) {
if (offscreenContext == null) {
offscreenContext = enableWebGLCanvas( canvas.offscreenCanvas,
{preserveDrawingBuffer: true} );
console.log("IMAGE_DATA");
console.log(offscreenContext.getImageData(0, 0, canvas.offscreenCanvas.width, canvas.offscreenCanvas.height));
}
//click_context = enableWebGLCanvas( canvas.clickCanvas );
//area_context = enableWebGLCanvas( canvas.areaCanvas );
context = offscreenContext;
} else {
//click_context = canvas.clickCanvas.getContext('2d')
//area_context = canvas.areaCanvas.getContext('2d')
context = canvas.offscreenCanvas.getContext('2d')
}
//Clear canvas
if (clear_canvas) {
context.clearRect(0, 0, canvas.offscreenCanvas.width, canvas.offscreenCanvas.height);
}
if (use_webgl) {
//click_context.start2D();
//area_context.start2D();
context.start2D();
}
let start_time = performance.now();
for (let i = layer_redraw_progress; i < layer_amount; i++) {
_draw_layer(i, context);
now = performance.now();
if (now - start_time > 15 || layer_amount - 1 == i) {
//console.log(`Drew `+(i+1-layer_redraw_progress)+` Layer in: ${now - start_time} ms`);
layer_redraw_progress = i+1;
break;
}
}
//console.log(canvas.offscreenCanvas.toDataURL());
//_draw_selection(selected_layer, context);
if (use_webgl) {
//click_context.finish2D();
//area_context.finish2D();
context.finish2D();
}
} else {
console.log("Not defined.")
}
}
function _draw(DOMHighResTimeStamp){
console.log("Useless draw call")
}
function draw(DOMHighResTimeStamp)
{
//console.log("Draw call")
if (redo_cache) {
layer_redraw_progress = 0
current_rendering_run_start = performance.now();
redo_cache = false;
}
if (layer_redraw_progress < layer_amount) {
draw_layer(layer_redraw_progress == 0);
}
if (layer_redraw_progress < layer_amount) {
document.getElementById("loading_text").innerHTML = "Rendering";
rendering_progress = layer_redraw_progress * 100 / layer_amount;
_OUT.value = parseInt(rendering_progress);
_PRG.value = rendering_progress;
let fadeTarget = document.getElementById("loader");
fadeTarget.style.opacity = Math.min(1, (performance.now() - current_rendering_run_start)/1000);
requestAnimationFrame( draw );
} else {
console.log("hide loader...");
rendering_progress = 100;
_OUT.value = parseInt(rendering_progress);
_PRG.value = rendering_progress;
_fade_out("loader", 1, 1);
}
}
// Gets the relevant location from a mouse or single touch event
function getEventLocation(e)
{
if (e.touches && e.touches.length == 1)
{
return { x:e.touches[0].clientX, y: e.touches[0].clientY }
}
else if (e.clientX && e.clientY)
{
return { x: e.clientX, y: e.clientY }
}
}
let isDragging = false
let dragStart = { x: 0, y: 0 }
let pointer_moved = false
function onPointerDown(e)
{
isDragging = true
//dragStart.x = getEventLocation(e).x/cameraZoom - cameraOffset.x
//dragStart.y = getEventLocation(e).y/cameraZoom - cameraOffset.y
dragStart.x = getEventLocation(e).x - cameraOffset.x
dragStart.y = getEventLocation(e).y - cameraOffset.y
//console.log("X: "+dragStart.x)
//console.log("Y: "+dragStart.y)
if (completely_loaded) {
pointer_moved = false
}
}
function _get_canvas_click_location(event) {
let result = {x: 0, y: 0}
let moving_canvas_container = document.getElementById("moving_canvas_container");
result.x = parseInt((getEventLocation(event).x - cameraOffset.x + 0.5 * parseFloat(moving_canvas_container.style.width)) * layerSize.x / parseFloat(moving_canvas_container.style.width));
result.y = parseInt((getEventLocation(event).y - cameraOffset.y + 0.5 * parseFloat(moving_canvas_container.style.height)) * layerSize.y / parseFloat(moving_canvas_container.style.height));
return result;
}
function _get_clicked_layer(x, y) {
start_time_blob_coords = performance.now();
let layer = -1;
for (let i = layer_amount-1; i >= 0; i--) {
js = layer_info[i]
if (typeof js !== 'undefined') {
if (js.visible) {
//opacity_map[(y+im.height*x)//8] |= (0b1 << (7 - ((y+im.height*x) % 8) ))
let res = layer_opacity[i][parseInt((y + layerSize.y * x)/8)] & (1 << (7 - ((y + layerSize.y * x)%8)));
if (res) {
layer = i;
break;
}
}
}
}
end_time_blob_coords = performance.now()
console.log(`Check image coords via blob ${end_time_blob_coords - start_time_blob_coords} ms`)
return layer;
}
function _single_click(x, y) {
if (x >= 0 && y>=0 && x < layerSize.x && y < layerSize.y) {
let id = _get_clicked_layer(x, y);
if (selected_layer != id) {
js = layer_info[id]
if (id != -1) {
console.log("switch layer to "+id)
console.log("Layer Name: "+js.name)
}
old_l = selected_layer;
selected_layer = id;
deselectLayerSide(old_l);
selectLayerSide(id);
}
}else if (selected_layer != -1) {
deselectLayerSide(selected_layer);
selected_layer = -1;
}
}
function _double_click(x, y){
if (x >= 0 && y>=0 && x < layerSize.x && y < layerSize.y) {
let id = _get_clicked_layer(x, y);
_focus_on_layer(id);
} else {
_focus_on_layer(-1);
}
}
function onPointerUp(e)
{
isDragging = false
initialPinchDistance = null
lastZoom = cameraZoom
if (pointer_moved == false) {
if (completely_loaded && layers[0] !== 'undefined') {
let click_coords = _get_canvas_click_location(e);
let x = click_coords.x;
let y = click_coords.y;
if (is_mobile()){