C/C++ Image Loading [closed]

Answer 1

FreeImage is a good open source library

Here is an example code, data is accessible with "out.data()"

FREE_IMAGE_FORMAT format = FreeImage_GetFileTypeU(filename.c_str());
if (format == FIF_UNKNOWN)      format = FreeImage_GetFIFFromFilenameU(filename.c_str());
if (format == FIF_UNKNOWN)      throw(std::runtime_error("File format not supported"));

FIBITMAP* bitmap = FreeImage_LoadU(format, filename.c_str());
FIBITMAP* bitmap2 = FreeImage_ConvertTo32Bits(bitmap);
FreeImage_Unload(bitmap);

std::vector out(FreeImage_GetWidth(bitmap2) * FreeImage_GetHeight(bitmap2) * 4);
FreeImage_ConvertToRawBits((BYTE*)out.data(), bitmap2, FreeImage_GetWidth(bitmap2) * 4, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK, true);

FreeImage_Unload(bitmap2);