I have a requirement where I need to read couple of Tiff tags from a input Tiff file. As user can provide any tag ID to read. For this, I need to know the type of the value of that tag so that i can read the tag and return the value to user.
const char* filename = "C:\\test\\Modified.tif";
TIFF* mtif = TIFFOpen(filename, "r");
uint16 flor, w, h;
uint16 gotcount = 0;
TIFFGetField(mtif, TIFFTAG_FILLORDER, &flor);
TIFFGetField(mtif, TIFFTAG_IMAGEWIDTH, &w);
TIFFGetField(mtif, TIFFTAG_IMAGELENGTH, &h);
I am using LibTif library. Here all i am able to read the width and height properly whereas fillorder tag value is not being received.
I opened the file in a Tiff editor and can see that FillOrder has valid value.
Can someone help me in this? Thanks.
Related
Can you explain to me why my EXTRACT doesn't work? I am trying to count the number of users with private profiles in my group (because mostly these are bots). So I need to check whether the string "This profile is private" exists on the user's page.
After the code runs, a blue frame appears around the DIV which means the element is pinned correctly. However, the extract result is NaN.
I tried extracting both TXT and HTM.
iimPlay("CODE:TAG POS=1 TYPE=DIV ATTR=TXT:This<SP>profile<SP>is<SP>private EXTRACT=TXT");
var pageblock = parseInt (iimGetLastExtract());
alert (pageblock);
An example page with a private profile:
https://vk.com/id646170325
I tried extracting both TXT and HTM.
Yep normal..., no way you can convert the extracted This profile is private (is a String) to an Integer...!, ... which is what parseInt() is trying to do..., => Result = NaN...
=> The Behaviour/Result looks then "normal" to me...
I've set up a webserver running on ESP8266 thats currently hosting 7 sites. The sites is written in plain HTML in each diffrent tab in the arduino ide. I have installed the library Pagebuilder to help with making everything look nice and run.
Except one thing. I have a button connected to my ESP8266 which by the time being imitates a sensor input. basicly when the button is pressed my integer "x" increments with 1. I also managed to make a string that replicates "x" and increments with the same value.
I also have a problem with Printing the IPadresse of the server, but thats not as important as the other.
My plan then was writing the string "score" (which contains x) into the HTML tab where it should be output. this obviously didnt work.
Things I've tried:
Splitting up the HTML code where I want the string to be printed and using client.println("");
This didnt work because the two libraries does not cooperate and WiFiClient does not find Pagebuilders server. (basicly, the client.println does nothing when I used it with Pagebuilder).
Reconstructing the HTML page as a literal really long string, and adding in the String with x like this: "html"+score+"html" and adding it into where the HTML page const char were. (basicly replacing the variable with the text that were in the variable).
This did neighter work because the argument "PageElement" from Pagebuilder does only expect one string, and errors out because theres an additional string inside the HTML string.
I've tried sending it as a post req. but this did not output the value either.
I have run out of Ideas to try.
//root page
#if defined(ARDUINO_ARCH_ESP8266)
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <WiFiClient.h>
#elif defined(ARDUINO_ARCH_ESP32)
#include <WiFi.h>
#include <WebServer.h>
#endif
#include "PageBuilder.h"
#include "currentGame.h" //tab 1
#if defined(ARDUINO_ARCH_ESP8266)
ESP8266WebServer Server;
ESP8266WebServer server;
#endif
int sensorPin = 2; // button input
int sensorValue = 0;
int x = 0; // the int x
String score=""; //the string x will be in
PageElement CURRENT_GAME_ELEMENT(htmlPage1);
PageBuilder CURRENT_GAME("/current-game", {CURRENT_GAME_ELEMENT}); // this //only showes on href /current-game
void button() {
sensorValue = analogRead(sensorPin); //read the voltage
score="Team 1: "+String((int)x+1); //"make" x a string
if (sensorValue <= 10) { // check if button is pressed
x++; // increment x
Serial.println(x);
Serial.println(score);
delay(100);
}
}
void setup() {
Serial.begin(115200);
pinMode(2, INPUT);
WiFi.softAP("SSID", "PASS");
delay(100);
CURRENT_GAME.insert(Server);
Server.begin();
}
void loop() {
Server.handleClient();
button();
}
// tab 1
const char htmlPage1[] PROGMEM = R"=====(
/*
alot of HTML, basicly the whole website...
..............................................
*/
<div class="jumbotron">
<div align="center">
<h1 class="display-4"> score </h1> // <--- this is where
//I want to print the
//string:
</div>
</div>
)=====";
what I want to do is getting the value of the string score displayed on the website. If I put "score" directly into the HTML, the word score will be displayed, not the value. I want the value displayed.
Edit:
I have figured out how to make the string(score) be printed in the HTML code, thus, I only have to convert the HTML code string back to a char. explanation is in comment below.
Edit 2: (-------------------------solution-------------------------)
Many thanks for the help I've gotten and sorry for being so ignorant, its just so hard being so close and that thing doesnt work. but anyways, What I did was following Pagebuilders example, and making another element to print in current game..
String test(PageArgument& args) {
return score;
}
const char html[] = "<div class=\"jumbotron\"><div align=\"center\"><h1 class=\"display-4\">{{NAME}}</h1></div></div>";
PageElement FRAMEWORK_PAGE_ELEMENT(htmlPage0);
PageBuilder FRAMEWORK_PAGE("/", {FRAMEWORK_PAGE_ELEMENT});
PageElement body_elem(html, { {"NAME", test} });
PageElement CURRENT_GAME_ELEMENT(htmlPage1);
PageBuilder CURRENT_GAME("/current-game", { CURRENT_GAME_ELEMENT, body_elem});
suprisingly easy when I first understood it.. Thanks again.
You could try building your string first, then converting it to a const char
like this: const char * c = str.c_str();
if you can't use a pointer you could try this:
string s = "yourHTML" + score + "moreHTML";
int n = s.length();
char char_array[n + 1];
strcpy(char_array, s.c_str());
additionally you could try the stringstream standard library
This sort of thing is often done using magic tags in your markup that are detected by the server code before it serves the HTML and filled in by executing some sort of callback or filling in a variable, or whatever.
So with this in mind and hoping for the best, I nipped over to: PageBuilder on github and looked to see if there was something similar here. Good news! In one of the examples:
const char html[] = "hello <b>{{NAME}}</b>, <br>Good {{DAYTIME}}.";
...
PageElement body_elem(html, { {"NAME", AsName}, {"DAYTIME", AsDayTime} });
Where {{NAME}} and {{DAYTIME}} are magic tokens. AsName and AsDayTime are functions to be called when the respective tag is encountered while the page is being served.
EDIT: in response to a request to explain differently, I'm not convinced I can do a better job of explaining the code than the example on the library's own github page, so I'll try a wordy description instead:
When you want to serve a webpage to a client, the code needs to know what you want to serve. In the simplest case, it's a static page: the same every time. You can just write the HTML, stick it in a string an be done.
whole_page = "<html>My fixed content</html>";
webserver.serve(whole_page);
But you want some dynamic element(s). As noted, you can do it in a few ways, such as serving some static HTML, then the dynamic bit, then some more static HTML. It seems you've not had much luck like this, and it's rather clunky anyway.
Or you can pre-build a new string out of the three bits and serve that in one chunk, but that's also pretty clunky.
(Aside: taking big strings and adding them together is likely to be slow and memory intensive, two things you really don't want on a little CPU like the ESP8266).
So instead, you allow 'magic' markers in the HTML, using a marker in place of the dynamic content, and serve that instead.
whole_page = "<html>My dynamic content. Value is {{my_value}}</html>";
webserver.serve(whole_page, ...);
The clever bit is that as the page is being served, the webserver is watching the text go by, and when it sees a magic tag, it stops and asks you to fill in the blank, then carries on as before.
Obviously, there is some processing overhead with watching for tags, and some programming overhead with telling it what tags to watch for and how to ask you for the data it needs.
I got advice from a friend who told me I should make a unique argument where I wanted the string(x) and then using some syntax to replace it. I also took inspiration from you Jelle..
what I did was make a unique argument "VAR_CURRENT_SCORE" put that into the HTML where I want the score output, then convert htmlPage1 from a char to a string, use string.replace() and replace "VAR_CURRENT_SCORE" with the string(x) score. this workes as I can see in the serial monitor output.
This is what I did:
//root page
String HTMLstring(htmlstringPage);
delay(100);
HTMLstring.replace("VAR_CURRENT_SCORE", score);
delay(50);
Serial.println("string:");
Serial.println(HTMLstring);
//tab 1 char htmlstringPage[] PROGMEM = R"=====(
<div class="jumbotron">
<div align="center">
<h1 class="display-4">VAR_CURRENT_SCORE</h1>
</div>
</div>
)=====";
However, I still have a small problem left which is converting the string back to char to post it to the website.
To convert the string back:
request->send_P(200, "text/html", HTMLstring.c_str());
In Django, I have programmed a form in which you can upload one image. After uploading the image, the image is passed to another method with the type TemporaryUploadedFile, after executing the method it is given to the HTML page.
What I would like to do is display that TemporaryUploadedFile as an image in HTML. It sounds quite simple to me but I could not find the answer on StackOverflow or on Google to the question: How to display a TemporaryUploadedFile in HTML without having to save it first, hence my question.
All help is appreciated.
Edit 1:
To give some more information about the code and the variables while debugging.
input_image = next(iter(request.FILES.values()))
output_b64 = (input_image.content_type, str(base64.b64encode(input_image.read()), 'utf8'))
Well, you can encode the image to base64 and use a data url as the value for src.
A base64 data url looks like this:
<img src="data:image/png;base64,SGLAFdsfsafsf098sflf">
\_______/ \__________________/
| |
File type base64 encoded data
Read the Mozilla docs for more on data urls.
Here's some relevant code:
import base64
def my_view(request):
# assuming `image` is a <TemporaryUploadedFile object>
image_b64 = base64.b64encode(image.read())
image_b64 = image_b64.decode('utf8') # convert bytes to string
image_type = image.content_type # png or jpeg or something else
return render('template', {'image_b64': image_b64, 'image_type': image_type})
Then in your template:
<img src="data:{{ image_type }};base64,{{ image_b64 }}">
I want to thank xyres for pushing me in the right direction. As you can see, I used some parts of his solution in the code below:
# As input I take one image from the form.
temp_uploaded_file = next(iter(request.FILES.values()))
# The TemporaryUploadedFile is converted to a Pillow Image
input_image = pil_image.open(temp_uploaded_file)
# The input image does not have a name so I set it afterwards. (This step, of course, is not mandatory)
input_image.filename = temp_uploaded_file.name
# The image is saved to an InMemoryFile
output = BytesIO()
input_image.save(output, format=img.format)
# Then the InMemoryFile is encoded
img_data = str(base64.b64encode(output.getvalue()), 'utf8')
output_b64 = ('image/' + img.format, img_data)
# Pass it to the template
return render(request, 'visualsearch/similarity_output.html', {
"output_image": output_b64
})
In the template:
<img id="output_image" src="data:{{ image.0 }};base64,{{ image.1 }}">
The current solution works but I don't think it is perfect because I expect that it can be done with less code and faster, so if you know how this can be done better you are welcome to post your answer here.
As the title says, I have been trying to write data that the user enters into a CEdit control to a file.
The system is a handheld terminal running Windows CE, in which my test application is running, and I try to enter test data (Japanese characters in Romaji, Hiragana, Katakana and Kanji mixed along with normal English alphanumeric data) that initially is displayed in a CListCtrl. The characters display properly on the handheld display screen in my test application UI.
Finally, I try to read back the data from the List control and write it to a text CSV file. The data I get on reading back from the control is correct, but on writing it to the CSV, things mess up and my CSV file is unreadable and shows strange symbols and nonsense alphanumeric garbage.
I searched about this, and I ended up with a similar question on stackOverflow:
UTF-8, CString and CFile? (C++, MFC)
I tried some of their suggestions and finally ended up with a proper UTF-8 CSV file.
The write-to-csv-file code goes like this:
CStdioFile cCsvFile = CStdioFile();
cCsvFile.Open(cFileName, CFile::modeCreate|CFile::modeWrite);
char BOM[3]={0xEF, 0xBB, 0xBF}; // Utf-8 BOM
cCsvFile.Write(BOM,3); // Write the BOM first
for(int i = 0; i < M_cDataList.GetItemCount(); i++)
{
CString cDataStr = _T("\"") + M_cDataList.GetItemText(i, 0) + _T("\",");
cDataStr += _T("\"") + M_cDataList.GetItemText(i, 1) + _T("\",");
cDataStr += _T("\"") + M_cDataList.GetItemText(i, 2) + _T("\"\r\n");
CT2CA outputString(cDataStr, CP_UTF8);
cCsvFile.Write(outputString, ::strlen(outputString));
}
cCsvFile.Close();
So far it is OK.
Now, for my use case, I would like to change things a bit such that the CSV file is encoded as Shift-JIS, not UTF-8.
For Shift-JIS, what BOM do I use, and what changes should I make to the above code?
Thank you for any suggestions and help.
Codepage for Shift-JIS is apparently 932. Use WideCharToMultiByte and MultiByteToWideChar for conversion. For example:
CStringW source = L"日本語ABC平仮名ABCひらがなABC片仮名ABCカタカナABC漢字ABC①";
CStringA destination = CW2A(source, 932);
CStringW convertBack = CA2W(destination, 932);
//Testing:
ASSERT(source == convertBack);
AfxMessageBox(convertBack);
As far as I can tell there is no BOM for Shift-JIS. Perhaps you just want to work with UTF16. For example:
CStdioFile file;
file.Open(L"utf16.txt", CFile::modeCreate | CFile::modeWrite| CFile::typeUnicode);
BYTE bom[2] = { 0xFF, 0xFE };
file.Write(bom, 2);
CString str = L"日本語";
file.WriteString(str);
file.Close();
ps, according to this page there are some problems between codepage 932 and Shift-JIS, although I couldn't duplicate any errors.
I've got a deceptively simple question: how can I get the text from a text field AND include the formatting? Going through the usual docs I found out it is possible to get the text only. It is also possible to get the text formatting, but this only works if the entire text field uses only one kind of formatting. I need the precise formatting so that I convert it to a string with html-tags.
Personally I need this so I can pass it to a custom-made text field component that uses HTML for formatting. But it could also be used to simply export the contents of any text field to any other format. This could be of interest to others out there, too.
Looking for a solution elsewhere I found this:
http://labs.thesedays.com/blog/2010/03/18/jsfl-rich-text/
Which seems to do the reverse of what I need, convert HTML to Flash Text. My own attempts to reverse this have not been successful thus far. Maybe someone else sees an easy way to reverse this that I’m missing? There might also be other solutions. One might be to get the EXACT data of the text field, which should include formatting tags of some kind(XML, when looking into the contents of the stored FLA file). Then remove/convert those tags. But I have no idea how to do this, if at all possible. Another option is to cycle through every character using start- and endIndex, and storing each formatting kind in an array. Then I could apply the formatting to each character. But this will result in excess tags. Especially for hyperlinks! So can anybody help me with this?
A bit late to the party but the following function takes a JSFL static text element as input and returns a HTML string (using the Flash-friendly <font> tag) based on the styles found it its TextRuns array. It's doing a bit of basic regex to clear up some tags and double spaces etc. and convert /r and /n to <br/> tags. It's probably not perfect but hopefully you can see what's going on easy enough to change or fix it.
function tfToHTML(p_tf)
{
var textRuns = p_tf.textRuns;
var html = "";
for ( var i=0; i<textRuns.length; i++ )
{
var textRun = textRuns[i];
var chars = textRun.characters;
chars = chars.replace(/\n/g,"<br/>");
chars = chars.replace(/\r/g,"<br/>");
chars = chars.replace(/ /g," ");
chars = chars.replace(/. <br\/>/g,".<br/>");
var attrs = textRun.textAttrs;
var font = attrs.face;
var size = attrs.size;
var bold = attrs.bold;
var italic = attrs.italic;
var colour = attrs.fillColor;
if ( bold )
{
chars = "<b>"+chars+"</b>";
}
if ( italic )
{
chars = "<i>"+chars+"</i>";
}
chars = "<font size=\""+size+"\" face=\""+font+"\" color=\""+colour+"\">"+chars+"</font>";
html += chars;
}
return html;
}