CODEWITHSUNDEEP
clinuximlib2
Siva Guru
Siva Guru

Reputation: 694

erorr reading Rgb Images uisng imLIb2

I am trying to read a raw RGBA image using imLIb2 (https://docs.enlightenment.org/api/imlib2/html/ -> according to this page it seems like they accept RGBA data for images)

    #include <Imlib2.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>

int main(int argc, char **argv)
{
    /* an image handle */
    Imlib_Image image;

    /* load the image */
    Imlib_Load_Error error;
    image = imlib_load_image_with_error_return("rgba.raw", &error);

    printf("load error:%d", error);

    if (image)
    {
        imlib_context_set_image(image);
        
        imlib_image_set_format("png");
        /* save the image */
        imlib_save_image("working.png");
    }
    else
    {
        printf("not loaded\n");
    }
}

loading other images formats like png and Jpeg work properly but when trying to load an RGBA image I get the error "IMLIB_LOAD_ERROR_NO_LOADER_FOR_FILE_FORMAT". Could someone tell me if I am missing something or should add Some header to the RGBA image or should I call some more functions before opening an RGBA image?

If Imlib2 doesn't support reading RgbA images is there any alternative C-library that can read rgb image and do scaling like functions?

Upvotes: 0

Views: 189

Answers (1)

Siva Guru
Siva Guru

Reputation: 694

So this for if someone is facing the same issue

Thanks to @mark-setchell for contributing!!

magickcore Api is an alternative C-library that can be used to perform functions on raw RGB.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <magick/ImageMagick.h>

int main(int argc, char **argv)
{
    ExceptionInfo
        exception;

    Image
        *image,
        *images,
        *resize_image,
        *thumbnails;

    ImageInfo
        *image_info;

    /*
      Initialize the image info structure and read an image.
    */
    
    InitializeMagick(NULL);
    GetExceptionInfo(&exception);
    image_info = CloneImageInfo((ImageInfo *)NULL);
    image_info->size = "1920x1080";
    image_info->depth = 8;
    (void)strcpy(image_info->filename, "image.rgba");
    images = ReadImage(image_info, &exception);

    if (images == (Image *)NULL)
        exit(1);

    resize_image = MinifyImage(images, &exception);

    if (resize_image == (Image *)NULL)
        printf("error \n");

    DestroyImageInfo(image_info);
    
    DestroyMagick();
    return (0);
}

for reading raw images the depth and the WxH have to be specified for the image. the above is a very small example for reducing the size in half. (https://imagemagick.org/script/magick-core.php).

Upvotes: 0

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