✨ initial commit
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337
examples/02-formats/main.go
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337
examples/02-formats/main.go
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package main
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import (
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"fmt"
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"github.com/landaiqing/freezelib"
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"os"
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)
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func main() {
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fmt.Println("📊 Output Format Examples")
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fmt.Println("=========================")
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// Create output directory
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os.MkdirAll("output", 0755)
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// Run format examples
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svgVsPngExample()
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qualityComparisonExample()
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dimensionExamples()
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formatOptimizationExample()
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fmt.Println("\n✅ Format examples completed!")
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fmt.Println("📁 Check the 'output' directory for generated files.")
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fmt.Println("📏 Compare file sizes and visual quality between formats.")
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}
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// SVG vs PNG comparison
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func svgVsPngExample() {
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fmt.Println("\n🆚 SVG vs PNG Comparison")
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fmt.Println("-------------------------")
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freeze := freezelib.New().
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WithTheme("github-dark").
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WithFont("JetBrains Mono", 14).
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WithWindow(true).
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WithLineNumbers(true).
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WithShadow(15, 0, 8)
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code := `package main
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import (
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"fmt"
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"net/http"
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"log"
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)
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func handler(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintf(w, "Hello, %s!", r.URL.Path[1:])
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}
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func main() {
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http.HandleFunc("/", handler)
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fmt.Println("Server starting on :8080")
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log.Fatal(http.ListenAndServe(":8080", nil))
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}`
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// Generate SVG
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svgData, err := freeze.GenerateFromCode(code, "go")
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if err != nil {
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fmt.Printf("❌ Error generating SVG: %v\n", err)
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return
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}
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// Generate PNG
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pngData, err := freeze.GeneratePNGFromCode(code, "go")
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if err != nil {
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fmt.Printf("❌ Error generating PNG: %v\n", err)
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return
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}
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// Save files
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svgPath := "output/comparison.svg"
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pngPath := "output/comparison.png"
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os.WriteFile(svgPath, svgData, 0644)
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os.WriteFile(pngPath, pngData, 0644)
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// Show file size comparison
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svgInfo, _ := os.Stat(svgPath)
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pngInfo, _ := os.Stat(pngPath)
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fmt.Printf("✅ Generated: %s (%d bytes)\n", svgPath, svgInfo.Size())
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fmt.Printf("✅ Generated: %s (%d bytes)\n", pngPath, pngInfo.Size())
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fmt.Printf("📊 Size ratio: PNG is %.1fx larger than SVG\n",
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float64(pngInfo.Size())/float64(svgInfo.Size()))
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}
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// Quality comparison with different settings
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func qualityComparisonExample() {
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fmt.Println("\n🎨 Quality Comparison")
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fmt.Println("---------------------")
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baseCode := `def quicksort(arr):
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if len(arr) <= 1:
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return arr
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pivot = arr[len(arr) // 2]
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left = [x for x in arr if x < pivot]
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middle = [x for x in arr if x == pivot]
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right = [x for x in arr if x > pivot]
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return quicksort(left) + middle + quicksort(right)
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# Example usage
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numbers = [3, 6, 8, 10, 1, 2, 1]
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sorted_numbers = quicksort(numbers)
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print(f"Original: {numbers}")
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print(f"Sorted: {sorted_numbers}")`
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// Different quality settings
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configs := []struct {
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name string
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width float64
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height float64
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fontSize float64
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theme string
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}{
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{"low_quality", 400, 300, 10, "github"},
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{"medium_quality", 800, 600, 14, "github-dark"},
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{"high_quality", 1200, 900, 16, "dracula"},
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{"ultra_quality", 1600, 1200, 18, "monokai"},
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}
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for _, config := range configs {
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fmt.Printf("🔧 Generating %s...\n", config.name)
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freeze := freezelib.New().
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WithTheme(config.theme).
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WithFont("JetBrains Mono", config.fontSize).
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WithDimensions(config.width, config.height).
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WithWindow(true).
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WithLineNumbers(true).
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WithShadow(10, 0, 5)
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// Generate PNG for quality comparison
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pngData, err := freeze.GeneratePNGFromCode(baseCode, "python")
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if err != nil {
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fmt.Printf("❌ Error: %v\n", err)
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continue
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}
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filename := fmt.Sprintf("output/quality_%s.png", config.name)
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err = os.WriteFile(filename, pngData, 0644)
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if err != nil {
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fmt.Printf("❌ Error saving: %v\n", err)
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continue
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}
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// Show file info
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info, _ := os.Stat(filename)
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fmt.Printf("✅ Generated: %s (%dx%d, %d bytes)\n",
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filename, config.width, config.height, info.Size())
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}
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}
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// Different dimension examples
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func dimensionExamples() {
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fmt.Println("\n📏 Dimension Examples")
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fmt.Println("---------------------")
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code := `SELECT u.name, u.email, COUNT(o.id) as order_count
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FROM users u
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LEFT JOIN orders o ON u.id = o.user_id
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WHERE u.created_at >= '2024-01-01'
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GROUP BY u.id, u.name, u.email
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HAVING COUNT(o.id) > 0
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ORDER BY order_count DESC
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LIMIT 10;`
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dimensions := []struct {
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name string
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width float64
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height float64
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desc string
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}{
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{"square", 600, 600, "Square format"},
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{"wide", 1000, 400, "Wide format (presentations)"},
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{"tall", 400, 800, "Tall format (mobile)"},
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{"standard", 800, 600, "Standard 4:3 ratio"},
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{"widescreen", 1200, 675, "Widescreen 16:9 ratio"},
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}
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for _, dim := range dimensions {
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fmt.Printf("📐 Creating %s format (%fx%f)...\n", dim.name, dim.width, dim.height)
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freeze := freezelib.New().
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WithTheme("nord").
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WithFont("Cascadia Code", 13).
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WithDimensions(dim.width, dim.height).
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WithWindow(true).
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WithLineNumbers(true).
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WithPadding(20)
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svgData, err := freeze.GenerateFromCode(code, "sql")
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if err != nil {
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fmt.Printf("❌ Error: %v\n", err)
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continue
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}
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filename := fmt.Sprintf("output/dimension_%s.svg", dim.name)
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err = os.WriteFile(filename, svgData, 0644)
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if err != nil {
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fmt.Printf("❌ Error saving: %v\n", err)
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continue
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}
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fmt.Printf("✅ Generated: %s - %s\n", filename, dim.desc)
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}
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}
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// Format optimization examples
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func formatOptimizationExample() {
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fmt.Println("\n⚡ Format Optimization")
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fmt.Println("----------------------")
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code := `import React, { useState, useEffect } from 'react';
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const TodoApp = () => {
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const [todos, setTodos] = useState([]);
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const [input, setInput] = useState('');
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useEffect(() => {
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// Load todos from localStorage
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const saved = localStorage.getItem('todos');
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if (saved) {
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setTodos(JSON.parse(saved));
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}
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}, []);
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const addTodo = () => {
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if (input.trim()) {
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const newTodo = {
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id: Date.now(),
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text: input,
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completed: false
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};
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setTodos([...todos, newTodo]);
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setInput('');
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}
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};
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return (
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<div className="todo-app">
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<h1>Todo List</h1>
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<input
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value={input}
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onChange={(e) => setInput(e.target.value)}
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placeholder="Add a todo..."
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/>
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<button onClick={addTodo}>Add</button>
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</div>
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);
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};
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export default TodoApp;`
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// Optimized for different use cases
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optimizations := []struct {
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name string
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format string
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description string
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config func() *freezelib.Freeze
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}{
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{
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"web_optimized",
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"svg",
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"Optimized for web (small, scalable)",
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func() *freezelib.Freeze {
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return freezelib.New().
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WithTheme("github").
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WithFont("system-ui", 12).
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WithPadding(15).
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WithWindow(false) // No window for smaller size
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},
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},
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{
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"print_optimized",
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"png",
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"Optimized for print (high DPI)",
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func() *freezelib.Freeze {
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return freezelib.New().
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WithTheme("github").
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WithFont("Times New Roman", 14).
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WithDimensions(1200, 900).
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WithWindow(true).
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WithLineNumbers(true).
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WithShadow(0, 0, 0) // No shadow for print
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},
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},
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{
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"social_optimized",
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"png",
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"Optimized for social media",
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func() *freezelib.Freeze {
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return freezelib.New().
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WithTheme("dracula").
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WithFont("Fira Code", 16).
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WithDimensions(1080, 1080). // Square for Instagram
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WithWindow(true).
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WithShadow(20, 0, 15).
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WithPadding(30)
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},
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},
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}
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for _, opt := range optimizations {
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fmt.Printf("🎯 Creating %s (%s)...\n", opt.name, opt.description)
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freeze := opt.config()
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var data []byte
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var err error
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var filename string
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if opt.format == "svg" {
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data, err = freeze.GenerateFromCode(code, "javascript")
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filename = fmt.Sprintf("output/optimized_%s.svg", opt.name)
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} else {
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data, err = freeze.GeneratePNGFromCode(code, "javascript")
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filename = fmt.Sprintf("output/optimized_%s.png", opt.name)
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}
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if err != nil {
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fmt.Printf("❌ Error: %v\n", err)
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continue
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}
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err = os.WriteFile(filename, data, 0644)
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if err != nil {
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fmt.Printf("❌ Error saving: %v\n", err)
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continue
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}
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info, _ := os.Stat(filename)
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fmt.Printf("✅ Generated: %s (%d bytes)\n", filename, info.Size())
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}
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}
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