Screenshot with reduce quality script for mac

captureOptimize.sh

#!/bin/bash

# ==============================================================================
# Script Name: captureOptimize.sh
# Description: Automated macOS Screen Capture & Image Processing Utility
#
# Functionality:
# 1. Captures a specific region of the screen based on standard input arguments
#    (X, Y, Width, Height) via native macOS `screencapture`.
# 2. Automatically falls back to an interactive selection mode (-i) if no
#    coordinates are provided.
# 3. Reads plain text directly from the macOS system clipboard (pbpaste).
# 4. Processes the captured image using ImageMagick (`magick`):
#    - Resizes image dimensions down to 85%.
#    - Strips all internal metadata for optimal file size reduction.
#    - Resamples image density to 72 DPI.
#    - Annotates clipboard text at the top-right corner with a semi-transparent
#      black background box and custom font styling.
# 5. Converts and exports the final output as a JPG file to a designated path.
# 6. Prints file details (Dimensions, File Size) to STDOUT and cleans up 
#    temporary processing files.
#
# Run with Shortcuts
# nohup ~/Scripts/captureOptimize.sh 268 362 1100 588 >/dev/null 2>&1 &
# ==============================================================================

# --- Configuration ---
MAGICK="/usr/local/bin/magick"
FONT_PATH="/Users/empty/Library/Fonts/GoogleSans-Regular.ttf"
TEMP_IMG="/tmp/capture_process.png"
OUTPUT_PATH="/Users/empty/Downloads/temp_resize.jpg"

# 1. Capture Area (Native macOS)
# If 4 arguments are passed ($1=X, $2=Y, $3=Width, $4=Height), use fixed rectangle (-R)
if [ "$#" -eq 4 ]; then
    CAPTURE_RECT="$1,$2,$3,$4"
    /usr/sbin/screencapture -R "$CAPTURE_RECT" -x "$TEMP_IMG"
else
    # Fallback to interactive mode if no coordinates given
    /usr/sbin/screencapture -i -x "$TEMP_IMG"
fi

# ตรวจสอบว่ามีไฟล์จากการ Capture หรือไม่
if [ -s "$TEMP_IMG" ]; then
    
    # 2. ดึง Text จาก Clipboard
    CLIP_TEXT=$(pbpaste)
    
    # ถ้าไม่มี Text ใน Clipboard ให้เว้นว่างไว้
    if [ -z "$CLIP_TEXT" ]; then
        CLIP_TEXT=" "
    fi

    # 3. Image Processing: Resize, Strip, Resample, and Annotate
    $MAGICK "$TEMP_IMG" \
        -resize 85% \
        -strip \
        -resample 72 \
        -font "$FONT_PATH" \
        -pointsize 24 \
        -fill white -undercolor '#00000080' \
        -gravity Northeast -annotate +15+15 " $CLIP_TEXT" \
        "$OUTPUT_PATH"

    # 4. แสดง Log ข้อมูลไฟล์
    FILE_SIZE=$(du -h "$OUTPUT_PATH" | cut -f1)
    DIMENSIONS=$($MAGICK identify -format "%wx%h" "$OUTPUT_PATH")
    
    echo "--- Process Complete ---"
    echo "Text Added : $CLIP_TEXT"
    echo "Dimensions : $DIMENSIONS"
    echo "File Size  : $FILE_SIZE"
    echo "Saved to   : $OUTPUT_PATH"

    # 5. ลบไฟล์ Capture ชั่วคราว
    rm "$TEMP_IMG"
else
    echo "Capture cancelled."
fi