12.3 and certaing PNGs: error rendering them

[rgomezc 0]

Hello,

 

I noticed since upgrading to 12.3 that certain PNG are rendered incorrectly by the TPngImage class. For instance, the attached PNG.

 

I have opened a bug report on Jira/QP: https://embt.atlassian.net/servicedesk/customer/portal/1/RSS-3382.

 

Just wondering if anybody else can confirm this, and if somebody can think of a workaround?

 

 

[Brian Evans 118]

A image showing what "rendered incorrectly" looks like would make it a lot easier to confirm reproduction.

[rgomezc 0]

Sorry, I attached it to the QP item but not here. This is an example from a vanilla RS 12.3 installation on a VM:

 

 

That object has this code on the dfm:

 

  object Image1: TImage
    Left = 24
    Top = 24
    Width = 577
    Height = 393
    Picture.Data = {
      0954506E67496D61676589504E470D0A1A0A0000000D49484452000003900000
      0390010300000075820C6700000006504C5445000000FFFFFFA5D99FDD000000
      0274524E53FFFFC8B5DFC7000005124944415478DAEDD8D18E5C2B0C4451F3FF
      1FED44CA80AB0C9DFB7215C9AD7DA4C9F401E3E579AAD02BE35F3F0B12121212
      1212121212121212F24BC9654BF9FB3DCFDA9F9156545D0DB94E6D9EBDF553B1
      CE49EF0D09090909093997EC6DE2D12CACD11E21E5DFD7B8BD372424242424E4
      64D28FA4B58DB3E7AD96AD7F8A75EF0D0909090909F92DE47EEE905E6DACB0A1
      E21A29212121212121BF965C767843D1F676BD56BD56212121212121BF87DC4F
      5D64B5D1E7516A986ADFC9D61B12121212127228A98F5E45FF8F1FEF0D090909
      09093995BC9FA5253F073D8A7795AED60925AEDE90909090909023C9D50A3BB5
      E33664355A759C5DBDC62EEB64FF2B8084848484841C46D681B0C679D61C75C8
      BFF4ADB7B07509764848484848C8B1A437ECA1DB9B57C347049F117B75404242
      4242428E27E33AE4908774BFE4EAD558AFB5859F1D4848484848C891E42EAA2B
      E80EDC57F0F650F69A90DFF5D8C090909090909043C97D38A5C47F87D454E486
      EDF731C2F64F6F4848484848C8B1A4876F0A72833AD83BACC3A0657B90909090
      909053496F1272743534DA08FD32ABE7B45B4042424242420E271DD566FD4AAB
      8CD6FA4F3D3EC2CF1A2424242424E44852AE9B2790F32F2DAB910ED323BB0668
      5D212121212121C7929D08695935AB8D968266EBE3E7A4232424242424E44832
      CE52B55A0F5A1BFB28F7C9908E15E30909090909093998D4B677BB3BC4A37D0E
      6BBBEC77F4AE90909090909063C98A608F55FD1AD747D2131AF2D14EEB589090
      909090909349FF3237A4EC15CF37B6CE70AB0DA97B3FFD2021212121214792FE
      A56DFCC7B175C115DD3DA6950A4848484848C8D1E43BA2AB8105EC21E20CB984
      BD6BC2BA424242424242CE2543E00AE1386F1EB97D980A6D1F2EAE3A48484848
      48C8B9E4AB4508D4AFB3BDAEAFDC3B35122424242424E454525B456DB5E31161
      FB1EBDD5DAB9904E7F1E4848484848C8A964C89602CBFECD47D52B84DFBD5A44
      4342424242428E23F53A5A03A47DD2B6CB008DE66CA7970CFBB3030909090909
      3992BC4377FFEED7556FEF44BDEB95F81E0312121212127226590BDA3C0E700F
      F58AE77CBCF501202121212121E792AB95D57B0FDED5D8FD79D9407D00FF1219
      12121212127226A901BA9F1ECAEBDACD6BBCAABA63BE56202121212121A7920E
      7934EF1D0FF094158F6F6B7FD6A51612121212127228A9115DAC5F4B439AA47D
      FE14D1D5C1868784848484841C4A16A5E15A6D430E6BDC7E1A366418FD032021
      21212121E792EF2BE87DE48EDC5EAB5C3C3E434242424242CE254396BCA15F66
      E37C8EB3A67418AC516E382424242424E4485203F68EDB3A960DD3D84E19C1C3
      BD8F0B090909090939930C21E230FDC0E7A1EA62AB675E175B4848484848C8E9
      649C83DE54CBFD8AFA7E8F76CE7B4142424242424E25DF019DCF51426A4FE89E
      B56CBDB42A20212121212147931AB1B5B99E2DA337B8A06C5D3CCC2121212121
      21E792DAC2A3793FD9F07B7DBFDD671D8584848484849C4CD6530D3496FB57B9
      1AE47A05EE6BBBDFE90309090909093992F450EDD06ED6BFE4FDF4A5B05F6F97
      FC404242424242CE26FD62DBA3D7AFB91AD17186AB5DFD13FC229C9090909090
      90C3498FD4B0431ABA61FBF9602BE23B1D9090909090905F457A70DFE1AC51EE
      4DFBF55847818484848484FC2632ACB006F04F15DC7A212E4A6B369D90909090
      9090A3C93A94D76FBFA2FABB36ECEDFD6C4242424242420E27F5D1F0EDEB5AED
      75298856F6108784848484849C4AFEDB07121212121212121212121212F20BC9
      5F587F72D194AAD03B0000000049454E44AE426082}
    Proportional = True
    Stretch = True
  end

 

 

[Brian Evans 118]

Well that is a new hell: the forum screws with the image. Also can't seem to delete the image I attached which ended up showing the same issue - size and bit depth messed with by the forum.

Looks like it is display issue - click the image to bring up large view, click the large view to bring up a fuller view - now that shows the original uploaded image which you can right click and save image as .. to get the proper bit depth and resolution that was uploaded.

 

If I load the image in your first post which is a 23kb 500x500x32 PNG into a TImage using the IDE it looks normal. Note the image itself does have gray pixels around the edges and borders of the squares - it is not black and white.

 

The 2kb 912x912x1 PNG in the DFM does display oddly both on the form and in the IDE image property editor. In Windows explorer and other image editors I tried it looks normal. It has only black and white pixels.

 

So the IDE does seem to have an issue with the 1 bit per pixel PNG. Can work around it by using a higher bit depth it seems but Delphi should really be fixed as the IDE exhibits the same issue. 

Attached is the 912x912x1 image re saved using MS Paint as a 9kb 912x912x32 PNG which works fine as well.

 

Edited 35 minutes ago by Brian Evans