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> Tutorials and Examples > [help] Saving a bitmap in memory to a png on disk?Goto page Previous 1, 2 |
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bitRAKE 30 Sep 2024, 00:34
Do you have a github or something? Where can I see your work nasm?
_________________ ¯\(°_o)/¯ “languages are not safe - uses can be” Bjarne Stroustrup |
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30 Sep 2024, 00:34 |
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nasm 30 Sep 2024, 06:36
bitRAKE, no github for me. I've never posted my code anywhere so far.
_________________ Do you think anyone will sell their soul over a 10 cent yoghurt with a bad after taste that lasts, a decade? |
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30 Sep 2024, 06:36 |
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bitRAKE 03 Oct 2024, 14:52
Here is the brief way to load any WIC supported image format and write out as another supported format:
Code:
.inputPath dq ? ; wide-string
.outputPath dq ? ; wide-string
; needed COM objects:
.pFactory IWICImagingFactory
.pDecoder IWICBitmapDecoder
.pFrame IWICBitmapFrameDecode
.pConverter IWICFormatConverter
.pStream IWICStream
.pEncoder IWICBitmapEncoder
.pFrameEncode IWICBitmapFrameEncode
CoCreateInstance & CLSID_WICImagingFactory2, NULL, CLSCTX_INPROC_SERVER, & IID_IWICImagingFactory, & .pFactory
IWICImagingFactory__CreateDecoderFromFilename [.pFactory], [.inputPath], NULL, GENERIC_READ, WICDecodeMetadataCacheOnDemand, & .pDecoder
IWICBitmapDecoder__GetFrame [.pDecoder], 0, & .pFrame
; create and configuring converter for desired output format:
IWICImagingFactory__CreateFormatConverter [.pFactory], & .pConverter
IWICFormatConverter__Initialize [.pConverter], [.pFrame], & GUID_WICPixelFormat32bppBGRA, WICBitmapDitherTypeNone, NULL, 0.0, WICBitmapPaletteTypeCustom
IWICImagingFactory__CreateStream [.pFactory], & .pStream
IWICStream__InitializeFromFilename [.pStream], [.outputPath], GENERIC_WRITE
IWICImagingFactory__CreateEncoder [.pFactory], & GUID_ContainerFormatBmp, NULL, & .pEncoder
IWICBitmapEncoder__Initialize [.pEncoder], [.pStream], WICBitmapEncoderNoCache
IWICBitmapEncoder__CreateNewFrame [.pEncoder], & .pFrameEncode, NULL
IWICBitmapFrameEncode__Initialize [.pFrameEncode], NULL
{data:16} .format ddq ? ; format need to be readwrite
movdqa xmm0, [GUID_WICPixelFormat32bppBGRA]
movdqa [.format], xmm0
IWICBitmapFrameEncode__SetPixelFormat [.pFrameEncode], & .format
; write the converted pixels to the frame
IWICBitmapFrameEncode__WriteSource [.pFrameEncode], [.pConverter], NULL
IWICBitmapFrameEncode__Commit [.pFrameEncode]
IWICBitmapEncoder__Commit [.pEncoder] Note: no error checking - lots of HRESULTS to examine, and IUnknown__Release all the objects when done. The important thing is to watch what data types and access restriction each parameter has. I've tested the code and it does work - this is the minimal process needed. |
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03 Oct 2024, 14:52 |
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nasm 07 Oct 2024, 09:36
bitRAKE, I'm going to try it soon. You're one of the legends who still care about the assembly forum.
The truth is, we DO need more PNG code, this example will get us far, but we do need to have alternatives too. It's a great world, the needs are also great. Do we have more legends? The fact of the matter is that it can be more than just PNG, if you have a custom image format that works well for video processing, that too is welcome. |
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07 Oct 2024, 09:36 |
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edfed 07 Oct 2024, 10:58
hem. an idea like this.. why don't develop a set of binaries that can be installed in ram and be called like any bios function? libpng can be one of these.
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07 Oct 2024, 10:58 |
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revolution 07 Oct 2024, 11:33
Code: ~ find /lib* -iname "libpng*" /lib/x86_64-linux-gnu/libpng12.so.0.54.0 /lib/x86_64-linux-gnu/libpng12.so.0 /lib/i386-linux-gnu/libpng12.so.0.54.0 /lib/i386-linux-gnu/libpng12.so.0 ~ |
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07 Oct 2024, 11:33 |
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bitRAKE 08 Oct 2024, 05:31
nasm wrote: You're one of the legends who still care about the assembly forum. _________________ ¯\(°_o)/¯ “languages are not safe - uses can be” Bjarne Stroustrup |
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08 Oct 2024, 05:31 |
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edfed 13 Oct 2024, 12:40
https://learn.microsoft.com/en-us/windows/win32/gdiplus/-gdiplus-converting-a-bmp-image-to-a-png-image-use
as in the screenshot example, but with png mimetype. it looks ok in win10 Code: section '.data' data readable writeable file_name du 'test.png',0 encoder_mimetype du 'image/png',0 Code: format PE GUI 4.0 include 'win32w.inc' struct GdiplusStartupInput GdiplusVersion dd ? DebugEventCallback dd ? SuppressBackgroundThread dd ? SuppressExternalCodecs dd ? ends struct ImageCodecInfo Clsid db 16 dup ? FormatID db 16 dup ? CodecName dd ? DllName dd ? FormatDescription dd ? FilenameExtension dd ? MimeType dd ? Flags dd ? Version dd ? SigCount dd ? SizeSize dd ? SigPattern dd ? SigMask dd ? ends section '.text' code readable executable entry $ invoke GdiplusStartup,token,input,NULL test eax,eax jnz exit invoke GdipGetImageEncodersSize,encoders_count,encoders_size test eax,eax jnz gdiplus_shutdown invoke VirtualAlloc,0,[encoders_size],MEM_COMMIT,PAGE_READWRITE test eax,eax jz gdiplus_shutdown mov ebx,eax invoke GdipGetImageEncoders,[encoders_count],[encoders_size],ebx test eax,eax jnz gdiplus_shutdown scan_encoders: mov esi,[ebx+ImageCodecInfo.MimeType] mov edi,encoder_mimetype mov ecx,(encoder_clsid-encoder_mimetype) shr 1 repe cmpsw je encoder_found add ebx,sizeof.ImageCodecInfo dec [encoders_count] jnz scan_encoders ; no encoder found jmp gdiplus_shutdown encoder_found: lea esi,[ebx+ImageCodecInfo.Clsid] mov edi,encoder_clsid mov ecx,4 rep movsd invoke VirtualFree,ebx,0,MEM_RELEASE invoke GetDC,HWND_DESKTOP test eax,eax jz gdiplus_shutdown mov esi,eax invoke GetSystemMetrics,SM_CYSCREEN mov [screen_height],eax invoke GetSystemMetrics,SM_CXSCREEN mov [screen_width],eax invoke CreateCompatibleBitmap,esi,[screen_width],[screen_height] test eax,eax jz release_desktop_dc mov ebx,eax invoke CreateCompatibleDC,esi test eax,eax jz delete_bitmap mov edi,eax invoke SelectObject,edi,ebx test eax,eax jz delete_dc invoke BitBlt,edi,0,0,[screen_width],[screen_height],esi,0,0,SRCCOPY test eax,eax jz delete_dc invoke GdipCreateBitmapFromHBITMAP,ebx,NULL,gdip_bitmap test eax,eax jnz delete_dc invoke GdipSaveImageToFile,[gdip_bitmap],file_name,encoder_clsid,NULL invoke GdipDisposeImage,[gdip_bitmap] delete_dc: invoke DeleteObject,edi delete_bitmap: invoke DeleteObject,ebx release_desktop_dc: invoke ReleaseDC,HWND_DESKTOP,esi gdiplus_shutdown: invoke GdiplusShutdown,[token] exit: invoke ExitProcess,0 section '.data' data readable writeable file_name du 'test.png',0 encoder_mimetype du 'image/png',0 .length = $ - encoder_mimetype encoder_clsid db 16 dup ? input GdiplusStartupInput 1 token dd ? memdc dd ? gdip_bitmap dd ? encoders_count dd ? encoders_size dd ? screen_width dd ? screen_height dd ? section '.rdata' data readable data import library kernel32,'KERNEL32.DLL',\ user32,'USER32.DLL',\ gdi32,'GDI32.DLL',\ gdiplus, 'GDIPLUS.DLL' include 'api\kernel32.inc' include 'api\user32.inc' include 'api\gdi32.inc' import gdiplus,\ GdiplusStartup,'GdiplusStartup',\ GdiplusShutdown,'GdiplusShutdown',\ GdipGetImageEncodersSize,'GdipGetImageEncodersSize',\ GdipGetImageEncoders,'GdipGetImageEncoders',\ GdipSaveImageToFile,'GdipSaveImageToFile',\ GdipDisposeImage,'GdipDisposeImage',\ GdipCreateBitmapFromHBITMAP,'GdipCreateBitmapFromHBITMAP' end data |
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13 Oct 2024, 12:40 |
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nasm 15 Oct 2024, 11:06
edfed, thats a nice example. Gdi+ is a very nice have, MS never drops support for their API's, so it's a nice have.
We have many good examples here now, the only thing missing is a private PNG library which I think Ali.Z said he had, if he could post it here then the thread would be complete. We will not scrutinize it, so don't be afraid to post it. If you feel that the work is too much and that nobody deserves the code, then you don't have to do it. _________________ Do you think anyone will sell their soul over a 10 cent yoghurt with a bad after taste that lasts, a decade? |
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15 Oct 2024, 11:06 |
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