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remove loop delay from gifs

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This commit is contained in:
Matt Walsh
2020-09-24 19:10:06 -05:00
parent 24855fd959
commit 26606757ce
6 changed files with 3 additions and 217 deletions
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212
server/scripts/twc3.js
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@@ -152,218 +152,6 @@ const GetMonthPrecipitation = async (WeatherParameters) => {
};
var GetOutlook = function (WeatherParameters) {
WeatherParameters.Outlook = null;
// No current support for HI and AK.
if (WeatherParameters.State === 'HI' || WeatherParameters.State === 'AK') {
GetTideInfo2(WeatherParameters);
return;
}
var ImagesLoadedCounter = 0;
var ImagesLoadedMax = 2;
var ImageOnError = function () {
GetTideInfo2(WeatherParameters);
};
var ImageOnLoad = function () {
ImagesLoadedCounter++;
if (ImagesLoadedCounter < ImagesLoadedMax) {
return;
}
var Outlook = {};
var now = new Date();
var CurrentMonth = new Date(now.getYear(), now.getMonth(), 1);
if (now.getDate() <= 14) {
CurrentMonth = CurrentMonth.addMonths(-1);
}
Outlook.From = CurrentMonth.getMonthShortName();
CurrentMonth = CurrentMonth.addMonths(1);
Outlook.To = CurrentMonth.getMonthShortName();
var cnvOutlookTempId = 'cnvOutlookTemp';
var contextTemp;
if (_DontLoadGifs === false) {
// Clear the current image.
divOutlookTemp.empty();
divOutlookTemp.html('<canvas id=\'' + cnvOutlookTempId + '\' />');
cnvOutlookTemp = $('#' + cnvOutlookTempId);
cnvOutlookTemp.attr('width', '719'); // For Chrome.
cnvOutlookTemp.attr('height', '707'); // For Chrome.
}
cnvOutlookTemp = $('#' + cnvOutlookTempId);
contextTemp = cnvOutlookTemp[0].getContext('2d');
contextTemp.drawImage(TempImage, 0, 0);
var TempColor = GetOutlookColor(WeatherParameters, contextTemp);
var Temperature = GetOutlookTemperatureIndicator(TempColor);
Outlook.Temperature = Temperature;
var cnvOutlookPrcpId = 'cnvOutlookPrcp';
var contextPrcp;
if (_DontLoadGifs === false) {
// Clear the current image.
divOutlookPrcp.empty();
divOutlookPrcp.html('<canvas id=\'' + cnvOutlookPrcpId + '\' />');
cnvOutlookPrcp = $('#' + cnvOutlookPrcpId);
cnvOutlookPrcp.attr('width', '719'); // For Chrome.
cnvOutlookPrcp.attr('height', '707'); // For Chrome.
}
cnvOutlookPrcp = $('#' + cnvOutlookPrcpId);
contextPrcp = cnvOutlookPrcp[0].getContext('2d');
contextPrcp.drawImage(PrcpImage, 0, 0);
var PrcpColor = GetOutlookColor(WeatherParameters, contextPrcp);
var Precipitation = GetOutlookPrecipitationIndicator(PrcpColor);
Outlook.Precipitation = Precipitation;
WeatherParameters.Outlook = Outlook;
PopulateOutlook(WeatherParameters);
GetTideInfo2(WeatherParameters);
};
var TempUrl = 'https://www.cpc.ncep.noaa.gov/products/predictions/30day/off14_temp.gif';
TempUrl = 'cors/?u=' + encodeURIComponent(TempUrl);
var TempImage = new Image();
TempImage.onload = ImageOnLoad;
TempImage.onerror = ImageOnError;
TempImage.src = TempUrl;
var PrcpUrl = 'https://www.cpc.ncep.noaa.gov/products/predictions/30day/off14_prcp.gif';
PrcpUrl = 'cors/?u=' + encodeURIComponent(PrcpUrl);
var PrcpImage = new Image();
PrcpImage.onload = ImageOnLoad;
TempImage.onerror = ImageOnError;
PrcpImage.src = PrcpUrl;
};
var GetOutlookColor = function (WeatherParameters, context) {
var X = 0;
var Y = 0;
var PixelColor = '';
var Latitude = WeatherParameters.Latitude;
var Longitude = WeatherParameters.Longitude;
// The height is in the range of latitude 75'N (top) - 15'N (bottom)
Y = ((75 - Latitude) / 53) * 707;
if (Latitude < 48.83) {
Y -= Math.abs(48.83 - Latitude) * 2.9;
}
if (Longitude < -100.46) {
Y -= Math.abs(-100.46 - Longitude) * 1.7;
} else {
Y -= Math.abs(-100.46 - Longitude) * 1.7;
}
// The width is in the range of the longitude ???
X = ((-155 - Longitude) / -110) * 719; // -155 - -40
if (Longitude < -100.46) {
X -= Math.abs(-100.46 - Longitude) * 1;
if (Latitude > 40) {
X += Math.abs(40 - Latitude) * 4;
} else {
X -= Math.abs(40 - Latitude) * 4;
}
} else {
X += Math.abs(-100.46 - Longitude) * 2;
if (Latitude < 36 && Longitude > -90) {
X += Math.abs(36 - Latitude) * 8;
} else {
X -= Math.abs(36 - Latitude) * 6;
}
}
// The further left and right from lat 45 and lon -97 the y increases
X = Math.round(X);
Y = Math.round(Y);
// Determine if there is any "non-white" colors around the area.
// Search a 16x16 region.
var FoundColor = false;
for (var ColorX = X - 8; ColorX <= X + 8; ColorX++) {
for (var ColorY = Y - 8; ColorY <= Y + 8; ColorY++) {
PixelColor = GetPixelColor(context, ColorX, ColorY);
if (PixelColor !== '#FFFFFF' && PixelColor !== '#000000') {
FoundColor = true;
}
if (FoundColor) {
break;
}
}
if (FoundColor) {
break;
}
}
return PixelColor;
};
var GetOutlookTemperatureIndicator = function (PixelColor) {
var RGB = HexToRgb(PixelColor);
if (RGB.b > RGB.r) {
return 'B';
} else if (RGB.r > RGB.b) {
return 'A';
} else {
return 'N';
}
};
var GetOutlookPrecipitationIndicator = function (PixelColor) {
var RGB = HexToRgb(PixelColor);
if (RGB.g > RGB.r) {
return 'A';
} else if (RGB.r > RGB.g) {
return 'B';
} else {
return 'N';
}
};
const GetPixelColor = (context, x, y) => {
var PixelData = context.getImageData(x, y, 1, 1).data;
var R = PixelData[0];
var G = PixelData[1];
var B = PixelData[2];
return '#' + ('000000' + RgbToHex(R, G, B)).slice(-6);
};
const RgbToHex = (r, g, b) => {
if (r > 255 || g > 255 || b > 255) throw 'Invalid color component';
return ((r << 16) | (g << 8) | b).toString(16).toUpperCase();
};
const HexToRgb = (h) => {
const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(h);
return result ? {
r: parseInt(result[1], 16),
g: parseInt(result[2], 16),
b: parseInt(result[3], 16),
} : null;
};
var PopulateOutlook = function (WeatherParameters) {
if (WeatherParameters === null || (_DontLoadGifs && WeatherParameters.Progress.Almanac !== LoadStatuses.Loaded)) {
return;