298 lines
10 KiB
Bash
298 lines
10 KiB
Bash
#!/bin/bash
|
|
|
|
# Script to minimize PNG images with progress bar
|
|
# Usage: ./minimize-png.sh [colors] file1.png file2.png ...
|
|
# Usage: ./minimize-png.sh [colors] *.png
|
|
# Works as Nemo script with selected files
|
|
# Default colors: 256
|
|
|
|
# Colors for output
|
|
RED='\033[0;31m'
|
|
GREEN='\033[0;32m'
|
|
YELLOW='\033[1;33m'
|
|
BLUE='\033[0;34m'
|
|
NC='\033[0m' # No Color
|
|
|
|
# Function to get colors from user via dialog (for Nemo)
|
|
get_colors_dialog() {
|
|
local colors=256
|
|
|
|
# Try zenity
|
|
if command -v zenity &> /dev/null; then
|
|
colors=$(zenity --entry \
|
|
--title="PNG Color Reduction" \
|
|
--text="Enter number of colors (8-256):" \
|
|
--entry-text="256" \
|
|
2>/dev/null)
|
|
|
|
# Check if user cancelled or entered invalid value
|
|
if [ $? -ne 0 ] || [ -z "$colors" ]; then
|
|
echo "256"
|
|
return
|
|
fi
|
|
else
|
|
# No dialog available, use default
|
|
echo "256"
|
|
return
|
|
fi
|
|
|
|
# Validate colors
|
|
if [[ "$colors" =~ ^[0-9]+$ ]] && [ "$colors" -ge 8 ] && [ "$colors" -le 256 ]; then
|
|
echo "$colors"
|
|
else
|
|
echo "256"
|
|
fi
|
|
}
|
|
|
|
# Function to check if pngquant is installed
|
|
check_pngquant() {
|
|
if ! command -v pngquant &> /dev/null; then
|
|
echo -e "${RED}Error: pngquant is not installed.${NC}"
|
|
echo -e "${YELLOW}Install pngquant with:${NC}"
|
|
echo " Ubuntu/Debian: sudo apt-get install pngquant"
|
|
echo " CentOS/RHEL: sudo yum install pngquant"
|
|
echo " Arch: sudo pacman -S pngquant"
|
|
exit 1
|
|
fi
|
|
}
|
|
|
|
# Main function
|
|
main() {
|
|
local colors=256
|
|
local file_args=()
|
|
local colors_was_explicit=false
|
|
|
|
# Parse arguments
|
|
for arg in "$@"; do
|
|
if [[ "$arg" =~ ^[0-9]+$ ]] && [ "$arg" -ge 8 ] && [ "$arg" -le 256 ]; then
|
|
colors="$arg"
|
|
colors_was_explicit=true
|
|
else
|
|
# Add all non-numeric arguments as potential file paths
|
|
file_args+=("$arg")
|
|
fi
|
|
done
|
|
|
|
# Check pngquant
|
|
check_pngquant
|
|
|
|
# Create output directory
|
|
local output_dir="min"
|
|
if [ ! -d "$output_dir" ]; then
|
|
mkdir -p "$output_dir"
|
|
echo -e "${GREEN}Created output directory: $output_dir${NC}"
|
|
fi
|
|
|
|
# Get files to process
|
|
local png_files=()
|
|
|
|
# If we have file arguments, process them
|
|
if [ ${#file_args[@]} -gt 0 ]; then
|
|
# Process file arguments (expand patterns and check files)
|
|
for pattern in "${file_args[@]}"; do
|
|
# Use shell expansion for patterns like *.png
|
|
for file in $pattern; do
|
|
if [[ -f "$file" ]] && [[ "$file" =~ \.(png|PNG)$ ]]; then
|
|
png_files+=("$file")
|
|
fi
|
|
done
|
|
done
|
|
else
|
|
echo -e "${RED}Error: No files specified.${NC}"
|
|
echo -e "${YELLOW}Usage from terminal: $0 [colors] file1.png file2.png ...${NC}"
|
|
echo -e "${YELLOW}Usage from terminal: $0 [colors] *.png${NC}"
|
|
echo -e "${YELLOW}Or select files in Nemo and run as script${NC}"
|
|
exit 1
|
|
fi
|
|
|
|
if [ ${#png_files[@]} -eq 0 ]; then
|
|
echo -e "${YELLOW}No PNG files found to process.${NC}"
|
|
exit 0
|
|
fi
|
|
|
|
local total_files=${#png_files[@]}
|
|
local total_size_before=0
|
|
local total_size_after=0
|
|
|
|
# Detect if running from Nemo (file manager) or terminal
|
|
local use_gui=false
|
|
local colors_from_dialog=false
|
|
local original_colors=$colors
|
|
|
|
# Only use GUI if:
|
|
# 1. Colors wasn't explicitly set
|
|
# 2. We're likely running from Nemo (NEMO_SCRIPT_SELECTED_FILE_PATHS is set)
|
|
# 3. zenity is available
|
|
if [ "$colors_was_explicit" = false ] && [ -n "$NEMO_SCRIPT_SELECTED_FILE_PATHS" ] && command -v zenity &> /dev/null; then
|
|
local dialog_colors
|
|
dialog_colors=$(get_colors_dialog)
|
|
if [ -n "$dialog_colors" ]; then
|
|
colors="$dialog_colors"
|
|
colors_from_dialog=true
|
|
use_gui=true
|
|
fi
|
|
fi
|
|
|
|
# Show initial info only for terminal
|
|
if [ "$use_gui" = false ]; then
|
|
echo -e "${GREEN}PNG minimization started${NC}"
|
|
echo -e "${BLUE}Colors set to: ${colors}${NC}"
|
|
echo -e "${BLUE}Files to process: ${total_files}${NC}"
|
|
echo -e "${BLUE}Output directory: ${output_dir}${NC}"
|
|
echo ""
|
|
fi
|
|
|
|
# Calculate total size before compression
|
|
for file in "${png_files[@]}"; do
|
|
if [ -f "$file" ]; then
|
|
size=$(stat -f%z "$file" 2>/dev/null || stat -c%s "$file" 2>/dev/null)
|
|
total_size_before=$((total_size_before + size))
|
|
fi
|
|
done
|
|
|
|
# Process each file with appropriate progress display
|
|
local count=0
|
|
if [ "$use_gui" = true ]; then
|
|
# Use zenity progress bar for GUI
|
|
(
|
|
for file in "${png_files[@]}"; do
|
|
if [ -f "$file" ]; then
|
|
count=$((count + 1))
|
|
filename=$(basename "$file")
|
|
output_file="${output_dir}/${filename}"
|
|
|
|
echo "# Minimizing $filename... ($count/$total_files)"
|
|
|
|
# Minimize the file
|
|
pngquant --output "$output_file" --force "$colors" "$file"
|
|
|
|
echo "$((count * 100 / total_files))"
|
|
fi
|
|
done
|
|
) | zenity --progress --title="PNG Minimization" --text="Initializing..." --percentage=0 --auto-close
|
|
|
|
# Check if user cancelled
|
|
if [ $? -ne 0 ]; then
|
|
zenity --error --text="Minimization was cancelled."
|
|
exit 1
|
|
fi
|
|
else
|
|
# Use terminal progress bar
|
|
for file in "${png_files[@]}"; do
|
|
if [ -f "$file" ]; then
|
|
count=$((count + 1))
|
|
filename=$(basename "$file")
|
|
output_file="${output_dir}/${filename}"
|
|
|
|
# Show terminal progress
|
|
local percentage=$((count * 100 / total_files))
|
|
printf "\r${BLUE}[%3d%%] Processing $filename ($count/$total_files)${NC}" "$percentage"
|
|
|
|
# Minimize the file
|
|
pngquant --output "$output_file" --force "$colors" "$file"
|
|
fi
|
|
done
|
|
echo "" # New line after progress
|
|
fi
|
|
|
|
# Calculate total size after compression
|
|
for file in "${png_files[@]}"; do
|
|
filename=$(basename "$file")
|
|
output_file="${output_dir}/${filename}"
|
|
if [ -f "$output_file" ]; then
|
|
size=$(stat -f%z "$output_file" 2>/dev/null || stat -c%s "$output_file" 2>/dev/null)
|
|
total_size_after=$((total_size_after + size))
|
|
fi
|
|
done
|
|
|
|
# Calculate statistics
|
|
local saved_bytes=$((total_size_before - total_size_after))
|
|
local saved_percentage=0
|
|
if [ "$total_size_before" -gt 0 ]; then
|
|
saved_percentage=$((saved_bytes * 100 / total_size_before))
|
|
fi
|
|
|
|
# Convert bytes to readable format with automatic KB/MB selection
|
|
local size_before_display
|
|
local size_after_display
|
|
local saved_display
|
|
local unit_before="MB"
|
|
local unit_after="MB"
|
|
local unit_saved="MB"
|
|
|
|
# Check if sizes are less than 1MB to display in KB
|
|
if [ "$total_size_before" -lt 1048576 ]; then
|
|
size_before_display=$((total_size_before / 1024))
|
|
unit_before="KB"
|
|
else
|
|
size_before_display=$((total_size_before / 1024 / 1024))
|
|
fi
|
|
|
|
if [ "$total_size_after" -lt 1048576 ]; then
|
|
size_after_display=$((total_size_after / 1024))
|
|
unit_after="KB"
|
|
else
|
|
size_after_display=$((total_size_after / 1024 / 1024))
|
|
fi
|
|
|
|
if [ "$saved_bytes" -lt 1048576 ]; then
|
|
saved_display=$((saved_bytes / 1024))
|
|
unit_saved="KB"
|
|
else
|
|
saved_display=$((saved_bytes / 1024 / 1024))
|
|
fi
|
|
|
|
# Show final report
|
|
if [ "$use_gui" = true ]; then
|
|
# Show report with zenity
|
|
local report_message="✓ Minimization completed!\n\n"
|
|
report_message+="Files processed: ${total_files}\n"
|
|
report_message+="Original size: ${size_before_display} ${unit_before}\n"
|
|
report_message+="Minimized size: ${size_after_display} ${unit_after}\n"
|
|
report_message+="Space saved: ${saved_display} ${unit_saved} (${saved_percentage}%)\n"
|
|
report_message+="Colors used: ${colors}\n"
|
|
report_message+="Output directory: ${output_dir}/"
|
|
|
|
zenity --info --title="PNG Minimization Complete" --text="$report_message"
|
|
else
|
|
# Show report in terminal
|
|
echo ""
|
|
echo -e "${GREEN}✓ Minimization completed!${NC}"
|
|
echo ""
|
|
echo -e "${BLUE}Statistics:${NC}"
|
|
echo -e " Files processed: ${total_files}"
|
|
echo -e " Original size: ${size_before_display} ${unit_before}"
|
|
echo -e " Minimized size: ${size_after_display} ${unit_after}"
|
|
echo -e " Space saved: ${saved_display} ${unit_saved} (${saved_percentage}%)"
|
|
echo -e " Colors used: ${colors}"
|
|
echo -e " Output directory: ${output_dir}/"
|
|
fi
|
|
}
|
|
|
|
# Show help if requested
|
|
if [[ "$1" == "-h" || "$1" == "--help" ]]; then
|
|
echo -e "${GREEN}Script to minimize PNG images${NC}"
|
|
echo ""
|
|
echo -e "${YELLOW}Usage:${NC}"
|
|
echo " $0 [colors] file1.png file2.png ..."
|
|
echo " $0 [colors] *.png"
|
|
echo " Or select files in Nemo file manager and run as script"
|
|
echo ""
|
|
echo -e "${YELLOW}Parameters:${NC}"
|
|
echo " colors Number of colors (8-256, default: 256)"
|
|
echo " files PNG files to minimize"
|
|
echo ""
|
|
echo -e "${YELLOW}Examples:${NC}"
|
|
echo " $0 image1.png image2.png # Minimize specific files with 256 colors"
|
|
echo " $0 128 *.png # Minimize all PNG files with 128 colors"
|
|
echo " $0 64 graphics/*.png # Minimize PNG files in graphics folder"
|
|
echo ""
|
|
echo -e "${BLUE}Note: Minimized images will be saved in the 'min' subdirectory${NC}"
|
|
echo -e "${BLUE} When used as Nemo script, a dialog will ask for colors${NC}"
|
|
echo -e "${BLUE} Requires pngquant for PNG optimization${NC}"
|
|
exit 0
|
|
fi
|
|
|
|
# Execute main
|
|
main "$@"
|