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&Vage
Grandmaster Cheater Supreme
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 Posted: Sun Jun 28, 2009 10:33 am Post subject: Comparing bitmaps |
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| Is there a function to compare 2 .bmps?
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talkerzero
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| Posted: Sun Jun 28, 2009 11:04 am Post subject: |
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| I guess you could open both files and compare each byte..
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hcavolsdsadgadsg
I'm a spammer
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| Posted: Sun Jun 28, 2009 3:02 pm Post subject: |
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1. The header will provide you with useful information, like the size, etc.
2. If that fails, the header also tells you where the actual pixel data is. Just compare the bytes.
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Strider96
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| Posted: Sun Jun 28, 2009 3:24 pm Post subject: Re: Comparing bitmaps |
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| ; wrote: | | Is there a function to compare 2 .bmps? |
I don't get what you want but if you have windows 7 you can move one file to the far left and one to the far right and they go into compare mode or you can use areosnap:
http://aerosnap.de/download/aerosnap/current_version/aerosnap_0_61_setup.exe
_________________
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HolyBlah
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| Posted: Sun Jun 28, 2009 4:08 pm Post subject: |
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| Read the files into memory and then use memcmp(if you are using C++) to compare them.
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hcavolsdsadgadsg
I'm a spammer
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| Posted: Sun Jun 28, 2009 4:15 pm Post subject: |
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| Code: | #include <Windows.h>
struct BitmapInfo{
DWORD* rawStart;
DWORD* width;
DWORD* height;
BYTE* bits;
};
void LoadBMP(char* path, struct BitmapInfo* bmi){
DWORD bytesRead;
HANDLE hFile = CreateFile(path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
DWORD bmSize = GetFileSize(hFile, NULL);
BYTE* bm = (BYTE*)HeapAlloc(GetProcessHeap(), 0, bmSize);
ReadFile(hFile, bm, bmSize, &bytesRead, NULL);
CloseHandle(hFile);
bmi->rawStart = (DWORD*)&bm[0x0A];
bmi->width = (DWORD*)&bm[0x12];
bmi->height = (DWORD*)&bm[0x16];
bmi->bits = &bm[*bmi->rawStart];
}
int main(void)
{
struct BitmapInfo bm1;
struct BitmapInfo bm2;
LoadBMP("C:\\bm1.bmp", &bm1);
LoadBMP("C:\\bm2.bmp", &bm2);
//example, bm1.bits points to the pixel data
//just compare them however you want. memcmp
return 0;
} |
I'm going out, I'm sure you can manage the rest. This should be more than enough to get you started
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&Vage
Grandmaster Cheater Supreme
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Joined: 25 Jul 2008
Posts: 1053
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| Posted: Sun Jun 28, 2009 4:45 pm Post subject: |
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| Oh gawd you're sexyyyy.
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