Affine transformation

[guga]

Hi Guys

Someone already tried to do some Affine transformations with GDIPlus directly from the pixel data of a image ?


I´m reading some examples here

https://www.codeproject.com/Tips/516761/Affine-Transformations-in-Computer-Graphics
https://github.com/LidaPetr/affine-transformation/blob/master/aurora.cpp
https://engineerslaboratory.wordpress.com/2016/08/27/affine-transformation-in-image-processing-explained-with-c/
https://en.wikipedia.org/wiki/Affine_transformation

Maybe could be a good idea to give a try. I wonder if using gdi plus to retrieve the pixel data and manipulating it directly to perform those tranformations could be faster the using the gdi+ apis itself. ?

[TouEnMasm]

Try to complie the first,little problem "#include <graphics.h>" no more exist.
Seem to be an old sample ,some says it's directx and some says it's opengl ????

[TimoVJL]

https://sourceforge.net/projects/openbgi/

https://github.com/nirin/WinBGI

[TouEnMasm]

Thanks for links
https://github.com/nirin/WinBGI     ;works (without errors !!!) with win10 VS2019 C++

[TouEnMasm]

First sample compiled ,works 64 in dos or Windows mode.Stop with spacebar.
Library too big for the forum.
can surely be done more easily with opengl. http://masm32.com/board/index.php?topic=8885.msg97287#msg97287

second sample

Microsoft Windows [version 10.0.19042.572]
(c) 2020 Microsoft Corporation. Tous droits réservés.

H:\ecrase>math
Affine Transformation is being created
Affine Transformation is being created
Affine Transformation is being created
Initial values:
1 0
Transformation:
3 -3
Inverse Transformation:
1 -2.22045e-16
Combined Transformation:
1 0

H:\ecrase>

[TimoVJL]

With these dll's it worked in Windows 7

[guga]

First sample compiled ,works 64 in dos or Windows mode.Stop with spacebar.
Library too big for the forum.
can surely be done more easily with opengl. http://masm32.com/board/index.php?topic=8885.msg97287#msg97287

second sample

Microsoft Windows [version 10.0.19042.572]
(c) 2020 Microsoft Corporation. Tous droits réservés.

H:\ecrase>math
Affine Transformation is being created
Affine Transformation is being created
Affine Transformation is being created
Initial values:
1 0
Transformation:
3 -3
Inverse Transformation:
1 -2.22045e-16
Combined Transformation:
1 0

H:\ecrase>

How did you managed to compiled ? Can it be one in VisualStudio and for x86 ?

[avcaballero]

Well, this is an example on GDI, rotating and scaling, if you are interested in source code:
http://abreojosensamblador.epizy.com/?Tarea=5&SubTarea=6#Rotozoomer

Using matrices to achieve such transformations is easy, I could make an example when have time

Here an example using a bitmap, it can accept any bmp file (drag and drop)
http://masm32.com/board/index.php?topic=7145.msg88350#msg88350

[TouEnMasm]

How did you managed to compiled ? Can it be one in VisualStudio and for x86 ?

On windows 10 with c++ of visual studio 2019,64 bits
* First step download the c++ project for the winbgi library (upper post,master....)
   del the soluce,open the project,compile with visual studio,He is very easy to compile in 32 or 64(no one error).
   When it is done,dowload the source code i have posted,made it compilable,it is compiled with command line,not visual studio.
* Now you have just to delet the code (except  include and lib),replace the code by the second sample,It much work at the first time.

You can made a batch with that

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EditMasmIni Platform
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EditMasmIni PATH
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\bin\Hostx64\x64
C:\Program Files (x86)\Windows Kits\10\bin\10.0.18362.0\x64

EditMasmIni LIB
C:\Program Files (x86)\Windows Kits\10\Lib\10.0.18362.0\um\x64
C:\Program Files (x86)\Windows Kits\10\Lib\10.0.18362.0\ucrt\x64
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\lib\x64

EditMasmIni INCLUDE
C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\um
C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\shared
C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\include

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X64

EditMasmIni CL
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[guga]

Well, this is an example on GDI, rotating and scaling, if you are interested in source code:
http://abreojosensamblador.epizy.com/?Tarea=5&SubTarea=6#Rotozoomer

Using matrices to achieve such transformations is easy, I could make an example when have time

Here an example using a bitmap, it can accept any bmp file (drag and drop)
http://masm32.com/board/index.php?topic=7145.msg88350#msg88350

Tks, Caballero

Please, when you have some time, try making some examples of transformations using matrices (whose pixel where retrieved from bitmap etc )

[avcaballero]

The same using matrices

[guga]

 

Tks a lot, caballero

Great Work