Getting RGB values for each pixel from a 24bpp Bitmap in C
- by seven
Hello,
i want to read the RGB values for each pixel from a .bmp file , so i can convert the bmp into a format suitable for gba .
so i need to get just the RGB for each pixel and then write this information to a file.
i am trying to use the windows.h structures :
typedef struct
{
char signature[2];
unsigned int fileSize;
unsigned int reserved;
unsigned int offset;
}BmpHeader;
typedef struct
{
unsigned int headerSize;
unsigned int width;
unsigned int height;
unsigned short planeCount;
unsigned short bitDepth;
unsigned int compression;
unsigned int compressedImageSize;
unsigned int horizontalResolution;
unsigned int verticalResolution;
unsigned int numColors;
unsigned int importantColors;
}BmpImageInfo;
typedef struct
{
unsigned char blue;
unsigned char green;
unsigned char red;
unsigned char reserved;
}Rgb;
typedef struct
{
BmpHeader header;
BmpImageInfo info;
Rgb colors[256];
unsigned short image[1];
}BmpFile;
but i only need RGB struct. So lets say i read "in.bmp":
FILE *inFile, *outFile;
inFile = fopen("C://in.bmp", "rb");
Rgb Palette[256];
for(i=0;i<256;i++)
{
fread(&Palette[i],sizeof(Rgb),1,inFile);
}
fclose(inFile);
is this correct ?
how do i write only the RGB information to a file ?
can anyone please give me some information please .
Thank you.
