Bitmap Image #1

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open

fatmaebrahim wants to merge 2 commits into main from development

README.md

-Original file line number
+Diff line change
@@ -1,2 +1,45 @@
     # Bitmap-Image-Fatma-Ebrahim
-    a small Go program that can read a bitmap image file and extract its dimensions (height and width).
+    This repository contains an implementation of a small Go program that can read a bitmap image file and extract its dimensions (height and width).
+    ## Features:
+    - Reads bitmap image and extracts its dimensions
+    - Accept the image file path as a command-line argument
+    ## How to Use:
+    ### Step 1: Install the library using `go get`
+      ```bash
+      go get github.com/codescalersinternships/Bitmap-Image-Fatma-Ebrahim
+      ```
+    This command fetches the library and adds it to your project's `go.mod` file.
+    ### Step 2: Import and use the library in your code
+      After running `go get`, you can import the library into your project and use the function as follows:
+      ```
+      package main
+    import (
+    	"fmt"
+    	bitmap "github.com/codescalersinternships/Bitmap-Image-Fatma-Ebrahim/pkg"
+    )
+    func main() {
+    	res,err := bitmap.GetDim("sample.bmp")
+    	if err != nil {
+    		fmt.Println(err)
+    		return
+    	}
+    	fmt.Printf("Bitmap image width: %d, height: %d\n", res.Width, res.Height)
+    }
+      ```
+    Also, you can specify the image file path via command-line argument as follows:
+    ```
+    go run main.go sample.bmp
+    ```

cmd/main.go

-Original file line number
+Diff line change
@@ -0,0 +1,17 @@
+    package main
+    import (
+    	"fmt"
+    	bitmap "github.com/codescalersinternships/Bitmap-Image-Fatma-Ebrahim/pkg"
+    )
+    func main() {
+    	res,err := bitmap.GetDim()
+    	if err != nil {
+    		fmt.Println(err)
+    		return
+    	}
+    	fmt.Printf("Bitmap image width: %d, height: %d\n", res.Width, res.Height)
+    }

go.mod

Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		module github.com/codescalersinternships/Bitmap-Image-Fatma-Ebrahim

		go 1.25.1

pkg/bitmap.go

-Original file line number
+Diff line change
@@ -0,0 +1,52 @@
+    package bitmap
+    import (
+    	"encoding/binary"
+    	"flag"
+    	"fmt"
+    	"os"
+    )
+    type bitmap struct {
+    	Width int
+    	Height int
+    }
+    func GetDim(paths ...string) (bitmap, error) {
+    	var path string
+    	if len(paths) == 0 {
+    		path = handleCLArgs()
+    	} else{
+    		path = paths[0]
+    	}
+    	img, err := os.ReadFile(path)
+    	bitmapImage := bitmap{}
+    	if err != nil {
+    		return bitmapImage, err
+    	}
+    	headerOffset :=14
+    	headerSize := 12
+    	header:= img [headerOffset: headerOffset + headerSize]
+    	widthOffset := 4
+    	size:= 4
+    	heightOffset := widthOffset + size
+    	width:= binary.LittleEndian.Uint16(header[widthOffset:widthOffset+size])
+    	height := binary.LittleEndian.Uint16(header[heightOffset:heightOffset+size])
+    	bitmapImage.Width = int(width)
+    	bitmapImage.Height = int(height)
+    	fmt.Printf("Bitmap image width: %d, height: %d\n", bitmapImage.Width, bitmapImage.Height)
+    	return bitmapImage, nil
+    }
+    func handleCLArgs() string {
+    	flag.Parse()
+    	path := flag.Arg(0)
+    	return path
+    }

sample.bmp

Binary file not shown.

Provide feedback