Libraries: PNG - page 2

[Dominik Egert]

Nikolai Semko #:

New version of the library 1.04

Unfortunately, CB does not allow you to update the code.

Added a default constructor to allow array declarations.

Example of using an array:

You can update the code in CB if you specify a valid #property version string. It needs to be greater than the last version.

[Nikolai Semko]

Dominik Egert #:
You can update the code in CB if you specify a valid #property version string. It needs to be greater than the last version.

That's what I do, but unfortunately it doesn't work.

[Patar Ferry C P Napit]

can you make this or MT4 please?

[Nikolai Semko]

Patar Ferry C P Napit #:
can you make this or MT4 please?

https://www.mql5.com/en/forum/467203#comment_53418848

see working example in mql4.zip file

[Vu Bao Linh]

Could you please have code to display walking bear at bottom of chart (from x = 0 -> width) (gif animation) show the remain time

[Nikolai Semko]

Vu Bao Linh #:
Could you please have code to display walking bear at bottom of chart (from x = 0 -> width) (gif animation) show the remain time

Like this?

Forum on trading, automated trading systems and testing trading strategies

Canvas is cool!

Yury Kulikov, 2019.09.19 11:05

[Muhammad Fahad]

new meta editor update causing this warning to pop up:

'struct CPoint' initialized from type type 'CPoint' using assignment operator, this behavior is deprecated and will be removed in future Canvas.mqh 2898 17

CPoint tmp=p[0];

[Nikolai Semko]

Muhammad Fahad #:
new meta editor update causing this warning to pop up:

'struct CPoint' initialized from type type 'CPoint' using assignment operator, this behavior is deprecated and will be removed in future Canvas.mqh 2898 17

The problem is not in my library. The CPoint class is a standard library class Rect.mqh, which in turn is referenced by the standard library Canvas.mqh. Wait for MQ to fix this file.

By the way, I have build 5227 and there are no warnings during compilation.

[Nikolai Semko]

Latest version of png.mqh.
I don't know why, but I can't update the file in the codebase.

[hini]

fix:

           int byteWidth = 0 ;
           switch (header.colorType) {
             case 6 :   // RGBA 
              byteWidth = 4 ;
               break ;
             case 2 :   // RGB 
              byteWidth = 3 ;
               break ;
             case 3 :   // Palette 
              byteWidth = 1 ;
               break ;
          }


           ArrayResize (imagePixels, imageWidth * imageHeight);
           ArrayResize (previousRow, imageWidth * byteWidth); 

Using the attached image will cause the program to encounter an array out-of-bounds error. The code above is the fixed version.