Hello,
Here is an example using the GdipLoadImageFromFile GDI+ function :
https://docs.microsoft.com/en-us/windows/win32/gdiplus/-gdiplus-image-flat
LoadImgFromFile PROC filename:QWORD
LOCAL BmpImage :QWORD
LOCAL hBitmap :QWORD
invoke GdipLoadImageFromFile,filename,\
ADDR BmpImage
invoke GdipCreateHBITMAPFromBitmap,BmpImage,\
ADDR hBitmap,0
invoke GdipDisposeImage,BmpImage
mov rax,hBitmap
ret
LoadImgFromFile ENDP
The first paremeter of the GdipLoadImageFromFile function expects a UNICODE filename.
:thumbsup:
Erol,
Your program is running fine. :thumbsup: Do they always have to be *.bmp or *.jpg? I would like to try it once with *.tga.
Gunther
It doesn't seem to work with TGA images. That's a pity.
Gunther
Quote from: Gunther on February 19, 2021, 10:11:57 AMDo they always have to be *.bmp or *.jpg? I would like to try it once with *.tga
Gdi+ handles jpg, jpeg, png, gif, tif and ico files, see attachment (work in progress, use at your own risk etc). Unfortunately it doesn't work with tga :sad:
Hi Gunther,
I guess you will need an external library to load .tga files.
Erol,
Quote from: Vortex on February 20, 2021, 02:20:35 AM
I guess you will need an external library to load .tga files.
loading TGA files isn't so hard. Displaying TGA files isn't easy. But it should be possible. IrfanView can do it (read, display, and write).
Gunther
If WIC don't support targa (.tga), it's a black sheep in image formats :undecided:
Quote from: Gunther on February 20, 2021, 03:48:20 AMloading TGA files isn't so hard. Displaying TGA files isn't easy. But it should be possible
Have fun (http://www.paulbourke.net/dataformats/tga/) :thumbsup:
Whether it's worthwhile is another question:
1. a medium-sized tga image is 20x the size of its jpg representation
2. converters tga->gif or jpg exist; even the old 1996 Paintshop 4.1 can do it, in batch mode
Timo,
Quote from: TimoVJL on February 20, 2021, 04:07:43 AM
If WIC don't support targa (.tga), it's a black sheep in image formats :undecided:
no it isn't. TGA was the first image format that could properly handle true color images, by the way.
Gunther
Hi Gunther,
Quote from: Gunther on February 20, 2021, 03:48:20 AM
loading TGA files isn't so hard. Displaying TGA files isn't easy. But it should be possible.
I think only is possible to diplay the format that you device support. Any other format must be translated by software or hardware.
Here there is an example of translator to BMP (that for sure can be displayed but some Vortex's function :biggrin:):
https://github.com/dbrant/imageformats/blob/master/ImageFormats/TgaReader.cs
Jochen,
Quote from: jj2007 on February 20, 2021, 04:48:18 AM
Have fun (http://www.paulbourke.net/dataformats/tga/) :thumbsup:
my reference is that (https://www.fileformat.info/format/tga/egff.htm).
Quote from: jj2007 on February 20, 2021, 04:48:18 AM
Whether it's worthwhile is another question:
1. a medium-sized tga image is 20x the size of its jpg representation
2. converters tga->gif or jpg exist; even the old 1996 Paintshop 4.1 can do it, in batch mode
Things are not so easy. Our fractal image compression software uses the TGA format for historical reasons. The encoder reads a TGA file and compresses it. I left out a lot of steps, but it's just the principle.
The decoder reads the compressed file, decodes it and writes back a TGA file. This can be viewed with various image viewers or image processing programs: Photoshop, Gimp, IrfanView... you name it.
We need lossless data, of course, which TGA provides; JPG is already lossy due to quantization.
In some cases it would be quite comfortable to see the result of the decoder directly without having to use additional software. But before I change everything in the encoder, decoder, filters (low pass, high pass, median),
and edge detectors, I have to try if my idea is feasible. I plan to proceed like this:
- Determine the size of the TGA file.
- Request enough memory for double buffer.
- Read the TGA header.
- Write a corresponding BITMAPFILEHEADER and BITMAPINFOHEADER in the memory.
- Copy the image data behind the new headers.
This should work, because the image data is the same for BMP and TGA: First comes the last line, then the second to last line, ... at the end then the first line.
Since we work with 24 bit color depth, the color order is also the same: Blue, Green, Red one byte each. I think MS kept a sharp eye on the TGA format when developing the BMP format.
The question now is: Is it possible to tell via GDI or GDI+ that there is a BMP file to display at the memory address?
Gunther
HSE,
Quote from: HSE on February 20, 2021, 06:41:40 AM
Here there is an example of translator to BMP (that for sure can be displayed but some Vortex's function :biggrin:):
https://github.com/dbrant/imageformats/blob/master/ImageFormats/TgaReader.cs
Yes, Dimitry Brant. The buddy handles all sorts of cases, including palette images with DAC table. However, I only need a specific case and do not want to shoot with cannons at sparrows.
Thank you for your effort.
Gunther
Quote from: Gunther on February 20, 2021, 06:47:23 AMThe question now is: Is it possible to tell via GDI or GDI+ that there is a BMP file to display at the memory address?
GdipCreateBitmapFromScan0 ?
24 bit BMP format is lossless but TGA is not supported in GDI+ so I would be looking for a library or even an app that will convert TGA to 24 bit BMP.
I found a couple of links that may be useful to you.
http://tgalib.sourceforge.net/
https://github.com/nothings/stb
Hi,
FASM mandeldb + MASM Example + TGALib
http://www.dca.fee.unicamp.br/~martino/disciplinas/ea978/tgaffs.pdf
; DON'T _RUN_ this file, just COMPILE it and view it with any
; image program that supports 8-bit paletted TGA-images (many does).
; usage: "fasm mandeldb.asm"
format binary as ".tga"
; Some basic image properties. Feel free to modify
Width equ 120
Height equ 120
IterLim equ 256
Prec equ 29; don't set above 29 nor to low, else image may be scrambled
; TGA-header: 8-bit paletted image
dw 256,1
db 0,0,1,24
dw 0,0,Width,Height
db 8,8
; palette: 256*3bytes (RGB)
repeat 256
db (%+54h) and 0FFh
db (%+0A9h) and 0FFh
db % - 1
end repeat
; actual image (Mandelbrot fractal)
PrecScale = 1 shl (Prec-1)
StepR = (5 shl (Prec-1) +Width shr 1) / Width; = 2.5/Width
StepI = (5 shl (Prec-1) +Height shr 1) / Height; = 3/Height
PosI = -5 shl (Prec-2); = -1.25
repeat Height
PosR = -2 shl Prec; = -2
repeat Width
R = PosR
I = PosI
RR = (PosR*PosR) shr Prec
II = (PosI*PosI) shr Prec
Color = IterLim - 1; Color is also the current iteration number
repeat IterLim
if (RR + II) > 4 shl Prec
break
end if
Tmp = (RR - II) + PosR
I = (R*I) / PrecScale + PosI
R = Tmp
RR = (Tmp*Tmp) shr Prec
II = (I*I) shr Prec
Color = Color - 1; discounting Color
end repeat
if Color < 0
Color = 0
end if
db Color
PosR = PosR + StepR
end repeat
PosI = PosI + StepI
end repeat
LiaoMi,
thank you for your distribution. I know the C library from Mr. Brueckner.
Is it your assembly language code? The program did crash. First I've loaded a 24 Bit True Color Image and it was displayed as greyscale image but upside down and torn quite obliquely.
By loading a large True Color Image (20 MB) the application crashed.
Gunther
Steve,
Quote from: hutch-- on February 20, 2021, 09:48:46 AM
24 bit BMP format is lossless but TGA is not supported in GDI+ so I would be looking for a library or even an app that will convert TGA to 24 bit BMP.
I found a couple of links that may be useful to you.
that doesn't help. I think that I'm on the right way, but it'll take some time. If I am successful, I will open a new thread.
Gunther
Hi Gunther,
no, this is an example from the fasm forum.. https://board.flatassembler.net/topic.php?t=4381
Quotebut upside down
mov [bmi.bmiHeader.biHeight], ecxmust be
push ecx
neg ecx
mov [bmi.bmiHeader.biHeight], ecx
pop ecxFor testing I took the file https://www.fileformat.info/format/tga/sample/8fcef46a9229460cae03d41f89ef5287/MARBLES.TGA, it was displayed, but the picture has a diagonal separator. The color of the picture is displayed very well.
Another interesting example is "
Decoding OpenGL Textures in Targa Format from an SQLite Database" - https://www.codeproject.com/Articles/21084/Decoding-OpenGL-Textures-in-Targa-Format-from-an-S
Framework for loading TGA image data from an SQLite table, decoding this data and binding it to OpenGL textures.
There has to code around to do the conversion, my ancient Micrografx Picture Publisher converts both ways, I guess its finding some code that has been posted that will do the conversion.
Quote from: LiaoMi on February 20, 2021, 09:05:52 PM
no, this is an example from the fasm forum.. https://board.flatassembler.net/topic.php?t=4381
Apparently only read correctly 32bit format
You can check file format inserting in line 358 (LoadTGA):
movsx eax, byte ptr [edx+8*2] ; <--- bitsPerPixel
pushad
print str$(eax),13,10
popad
New attachment at the top. Corrected some minor bugs.
Library to read TGA files and other things
https://archive.codeplex.com/?p=directxtex (https://archive.codeplex.com/?p=directxtex)
Good work Erol. :thumbsup:
Yves,
Quote from: TouEnMasm on February 21, 2021, 04:55:43 AM
Library to read TGA files and other things
https://archive.codeplex.com/?p=directxtex (https://archive.codeplex.com/?p=directxtex)
thank you for the link.
Gunther
Hallo, Gunther!
Lesson #33: Loading Compressed and Uncompressed TGA's (http://masm32.com/board/index.php?topic=8722.msg95636#msg95636)
The "DirectXTex texture processing library" https://github.com/Microsoft/DirectXTex (https://github.com/Microsoft/DirectXTex)
Seem to be done by microsoft,so I have translated the DirectXTex.h with the LoadFromTGAFile function.
doc of the library can be found here https://github.com/microsoft/DirectXTex/wiki/DirectXTex (https://github.com/microsoft/DirectXTex/wiki/DirectXTex)
Sample of use for the function
Quote
auto image = std::make_unique<ScratchImage>();
HRESULT hr = LoadFromTGAFile( L"ROCKS.TGA", TGA_FLAGS_NONE, nullptr, *image );
if ( FAILED(hr) )
// error
image is a structure defined in directxtex.sdk
Quote
I have try to add the 32 bit lib,too large
Image STRUCT DEFALIGNMASM
awidth XMASM ?
height XMASM ?
format DWORD ?
rowPitch XMASM ?
slicePitch XMASM ?
pixels XMASM ?
Image ENDS
.data
Oneimage image <>
.code
invoke LoadFromTGAFile,TXT( "ROCKS.TGA"), TGA_FLAGS_NONE,NULL, addr Oneimage ;perhaps name must be in unicode
Quote from: TouEnMasm on February 21, 2021, 07:51:19 PM
The "DirectXTex texture processing library" https://github.com/Microsoft/DirectXTex (https://github.com/Microsoft/DirectXTex)
I've tried the ...\DirectXTex-master\DirectXTex_Desktop_2017.sln
with VS Express 2010, but obviously it throws loads of errors (so much to portability etc). Could you build the DLL, Yves, can you post it?
http://www.dhpoware.com/source/bitmap.html
JJ,
library 32 on my site http://luce.yves.pagesperso-orange.fr/directxtex.zip (http://luce.yves.pagesperso-orange.fr/directxtex.zip) + hader
Thanks, Yves :thumbsup:
find a tga dumper who can be of great help (enum...)
Quote
TGA ---------------------------------------------- XING_T32.TGA --------------------------
ColorMap Type = 0
ImageType = 2 TGA_TRUECOLOR
ColorMap First = 0
ColorMap Length = 0
ColorMap Entry Size = 0
Origin 0, 0
Size: 240 by 164
Bits Per Pixel 32
Image descriptor 20
TGA_FLAGS_INVERTY
reusing the dumpfile and the image given by LiaoMi (XING_T32.TGA) in C++.
Follow use of the Directx::ScratchImage class
Quote
int __cdecl wmain(int argc, wchar_t* argv[], wchar_t* envp[])
{
const DirectX::Image* ImageStruct = 0 // To show the content of Image struct
auto image = std::make_unique<ScratchImage>();
HRESULT hr = LoadFromTGAFile( L"XING_T32.TGA",nullptr, *image );
if ( FAILED(hr) )
printf("LoadFromTGAFile failed");
else printf("LoadFromTGAFile REUSSITE \n");
// size_t __cdecl GetPixelsSize() const { return m_size; }
ImageStruct = image->GetImages();
// image->m_image
printf("image width %d", ImageStruct->width );
Next step is to create a masm proto to call that.
Yves,
thank you for your efforts.
Quote from: TouEnMasm on February 23, 2021, 03:23:41 AM
find a tga dumper who can be of great help (enum...)
The TGA header contains 18 bytes in which all information about the image and its display is stored. Reading these out and interpreting them correctly is really not witchcraft.
What MS has written in code for this simple task is very cumbersome. On the PowerBASIC page, you can find a TGA Viewer, written by me with PB 3.5 (DOS compiler).
The program can display True Color images and TGA images with DAC (256 colors) correctly. To be able to display large images, I used the XMS memory and worked with
VESA bank switching. The credits of the program still show my old mail address at CompuServe. So the program was written in the mid 90s.
Of course, my program has weaknesses. I am in the process of changing that. At that time VESA 2.0 was up to date and my program hard coded e.g. some VESA modes.
The right thing to do, of course, is to get the list of available VESA modes and scan them etc.
Gunther
I have just a little problem with the upper function.
I can do manything to get informations and modify the file but ... I don't know how to view it ??
any idea ??
There is no DC given.
Yves,
Quote from: TouEnMasm on February 25, 2021, 04:13:55 AM
I have just a little problem with the upper function.
I can do manything to get informations and modify the file but ... I don't know how to view it ??
any idea ??
There is no DC given.
not at the moment. Let me think about that.
Gunther