### Add Audio to Movie (Java)

Source: https://context7.com/svga/svga-format/llms.txt

Example code demonstrating how to add `AudioEntity` objects to a `MovieEntity` builder in Java. This shows how to embed background music and sound effects with their respective timing and frame information.

```java
// Example: Adding background music that plays from frame 0 to 100
AudioEntity bgMusic = AudioEntity.newBuilder()
    .setAudioKey("background.mp3")
    .setStartFrame(0)
    .setEndFrame(100)
    .setStartTime(0)
    .setTotalTime(5000)  // 5 seconds
    .build();

// Example: Sound effect that plays at frame 30
AudioEntity soundEffect = AudioEntity.newBuilder()
    .setAudioKey("explosion.mp3")
    .setStartFrame(30)
    .setEndFrame(35)
    .setStartTime(0)
    .setTotalTime(250)  // 250ms
    .build();

MovieEntity.Builder movie = MovieEntity.newBuilder();
movie.addAudios(bgMusic);
movie.addAudios(soundEffect);
```

--------------------------------

### Define Audio Synchronization (Protobuf)

Source: https://context7.com/svga/svga-format/llms.txt

Defines `AudioEntity` for synchronizing audio files with animation frames. It specifies the audio file key, start and end frames for playback, and timing offsets in milliseconds. This is essential for audio-visual synchronization.

```protobuf
message AudioEntity {
    string audioKey = 1;        // Audio filename (e.g., "sound.mp3")
    int32 startFrame = 2;       // Animation frame to start playback
    int32 endFrame = 3;         // Animation frame to stop playback
    int32 startTime = 4;        // Audio offset in milliseconds
    int32 totalTime = 5;        // Total audio duration in milliseconds
}
```

--------------------------------

### Create Rectangle Shape (Java)

Source: https://context7.com/svga/svga-format/llms.txt

Example code demonstrating how to construct a `ShapeEntity` for a rectangle using Java. It specifies the rectangle's dimensions, corner radius, fill color, stroke color, and line cap style.

```java
// Example: Drawing a red rectangle with blue stroke
ShapeEntity rectangle = ShapeEntity.newBuilder()
    .setType(ShapeEntity.ShapeType.RECT)
    .setRect(ShapeEntity.RectArgs.newBuilder()
        .setX(10.0f).setY(10.0f)
        .setWidth(80.0f).setHeight(60.0f)
        .setCornerRadius(5.0f))
    .setStyles(ShapeEntity.ShapeStyle.newBuilder()
        .setFill(ShapeEntity.ShapeStyle.RGBAColor.newBuilder()
            .setR(1.0f).setG(0.0f).setB(0.0f).setA(1.0f))
        .setStroke(ShapeEntity.ShapeStyle.RGBAColor.newBuilder()
            .setR(0.0f).setG(0.0f).setB(1.0f).setA(1.0f))
        .setStrokeWidth(2.0f)
        .setLineCap(ShapeEntity.ShapeStyle.LineCap.LineCap_ROUND))
    .setTransform(Transform.newBuilder() // Assuming Transform is defined elsewhere
        .setA(1.0f).setD(1.0f)
        .setTx(0.0f).setTy(0.0f))
    .build();
```

--------------------------------

### Define MovieEntity Structure with Protocol Buffers

Source: https://context7.com/svga/svga-format/llms.txt

Defines the root MovieEntity message for SVGA animations using Protocol Buffers. It includes version, canvas parameters, images, sprites, and audios. This structure is serialized into the binary .svga file. Example usage in Java demonstrates building and serializing a MovieEntity.

```protobuf
syntax = "proto3";
package com.opensource.svga;

message MovieEntity {
    string version = 1;                 // SVGA format version (e.g., "2.0.0")
    MovieParams params = 2;             // Canvas size, FPS, frame count
    map<string, bytes> images = 3;      // Image key -> PNG binary data or filename
    repeated SpriteEntity sprites = 4;  // Sprite/layer definitions
    repeated AudioEntity audios = 5;    // Audio tracks with timing info
}

message MovieParams {
    float viewBoxWidth = 1;     // Canvas width in points
    float viewBoxHeight = 2;    // Canvas height in points
    int32 fps = 3;              // Frame rate: [1,2,3,5,6,10,12,15,20,30,60]
    int32 frames = 4;           // Total frame count
}
```

```java
// Example usage in Java
MovieEntity.Builder builder = MovieEntity.newBuilder();
builder.setVersion("2.0.0");

MovieParams params = MovieParams.newBuilder()
    .setViewBoxWidth(300.0f)
    .setViewBoxHeight(300.0f)
    .setFps(20)
    .setFrames(144)
    .build();
builder.setParams(params);

// Add image data
byte[] imageData = Files.readAllBytes(Paths.get("sprite.png"));
builder.putImages("sprite_key", ByteString.copyFrom(imageData));

MovieEntity movie = builder.build();
byte[] serialized = movie.toByteArray(); // Serialize to binary
```

--------------------------------

### Create SVG Path Shape (Java)

Source: https://context7.com/svga/svga-format/llms.txt

Example code demonstrating how to construct a `ShapeEntity` for an SVG path using Java. This allows for complex vector shapes defined by SVG path data strings, with specified fill color.

```java
// Example: Drawing an SVG path (triangle)
ShapeEntity triangle = ShapeEntity.newBuilder()
    .setType(ShapeEntity.ShapeType.SHAPE)
    .setShape(ShapeEntity.ShapeArgs.newBuilder()
        .setD("M 50 0 L 100 100 L 0 100 Z"))
    .setStyles(ShapeEntity.ShapeStyle.newBuilder()
        .setFill(ShapeEntity.ShapeStyle.RGBAColor.newBuilder()
            .setR(0.0f).setG(1.0f).setB(0.0f).setA(0.8f)))
    .build();
```

--------------------------------

### Compile Protocol Buffer Definitions for SVGA

Source: https://context7.com/svga/svga-format/llms.txt

Demonstrates compiling the `svga.proto` definition file into various programming language bindings using `protoc`. This enables cross-platform compatibility for SVGA animations. It also includes generating a JSON schema for documentation.

```bash
#!/bin/bash

# Generate Objective-C bindings
protoc --objc_out="./" svga.proto

# Generate Java bindings
protoc --java_out="./" svga.proto

# Generate JavaScript bindings (CommonJS)
protoc --js_out=import_style=commonjs,binary:. svga.proto

# Generate JSON schema for documentation
pbjs -t json svga.proto > svga.json

# Generate Java bindings using Wire library (alternative)
java -jar wire-compiler-2.2.0-jar-with-dependencies.jar \
    --proto_path=./ \
    --java_out=wire220 \
    svga.proto

# Usage example - compile all bindings
chmod +x svga.pb.sh
./svga.pb.sh

# For Python bindings (not in default script)
protoc --python_out=./ svga.proto

# For Go bindings
protoc --go_out=./ svga.proto

# For C# bindings
protoc --csharp_out=./ svga.proto

```

--------------------------------

### Create and Serialize SVGA Animation in Java

Source: https://context7.com/svga/svga-format/llms.txt

This Java code demonstrates the complete process of creating an SVGA animation programmatically. It includes defining movie parameters, loading image data, constructing sprite entities with frame-by-frame transformations, and finally serializing and compressing the animation into an SVGA file. Dependencies include the SVGA protobuf definitions and standard Java I/O libraries.

```java
import com.opensource.svgaplayer.proto.Svga.*;
import com.google.protobuf.ByteString;
import java.io.*;
import java.util.zip.Deflater;
import java.nio.file.Files;
import java.nio.file.Paths;

public class SVGACreator {

    public static void createAnimation() throws IOException {
        // Create movie parameters
        MovieParams params = MovieParams.newBuilder()
            .setViewBoxWidth(400.0f)
            .setViewBoxHeight(400.0f)
            .setFps(30)
            .setFrames(90)  // 3 seconds at 30fps
            .build();

        // Load image data
        byte[] spriteImage = Files.readAllBytes(Paths.get("assets/sprite.png"));

        // Create sprite with animation
        SpriteEntity.Builder sprite = SpriteEntity.newBuilder()
            .setImageKey("sprite.png");

        // Generate 90 frames of rotation animation
        for (int i = 0; i < 90; i++) {
            double angle = (i / 90.0) * 2 * Math.PI;
            float cosA = (float) Math.cos(angle);
            float sinA = (float) Math.sin(angle);

            // Create rotation transform matrix
            Transform transform = Transform.newBuilder()
                .setA(cosA)   // cos(θ)
                .setB(sinA)   // sin(θ)
                .setC(-sinA)  // -sin(θ)
                .setD(cosA)   // cos(θ)
                .setTx(200.0f)  // Center X
                .setTy(200.0f)  // Center Y
                .build();

            FrameEntity frame = FrameEntity.newBuilder()
                .setAlpha(1.0f)
                .setLayout(Layout.newBuilder()
                    .setX(0).setY(0)
                    .setWidth(100).setHeight(100))
                .setTransform(transform)
                .build();

            sprite.addFrames(frame);
        }

        // Build complete movie entity
        MovieEntity movie = MovieEntity.newBuilder()
            .setVersion("2.0.0")
            .setParams(params)
            .putImages("sprite.png", ByteString.copyFrom(spriteImage))
            .addSprites(sprite)
            .build();

        // Serialize and compress
        byte[] serialized = movie.toByteArray();
        byte[] compressed = compress(serialized);

        // Write to file
        Files.write(Paths.get("output.svga"), compressed);
        System.out.println("SVGA file created: output.svga");
    }

    private static byte[] compress(byte[] data) throws IOException {
        Deflater deflater = new Deflater();
        deflater.setInput(data);
        deflater.finish();

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream(data.length);
        byte[] buffer = new byte[1024];

        while (!deflater.finished()) {
            int count = deflater.deflate(buffer);
            outputStream.write(buffer, 0, count);
        }

        outputStream.close();
        return outputStream.toByteArray();
    }

    public static void main(String[] args) {
        try {
            createAnimation();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

```

--------------------------------

### Load and Parse SVGA File in JavaScript

Source: https://context7.com/svga/svga-format/llms.txt

This snippet shows how to load a compressed SVGA file, decompress it using zlib, and deserialize the Protocol Buffer data into a MovieEntity object. It then accesses and logs animation parameters, sprite details, and image data. Dependencies include 'fs', 'zlib', and the generated SVGA proto file.

```javascript
const svga = require('./proto/js/svga_pb.js');
const fs = require('fs');
const zlib = require('zlib');

// Load and decompress SVGA file
async function loadSVGA(filePath) {
    try {
        // Read compressed binary file
        const compressedData = fs.readFileSync(filePath);

        // Decompress using zlib
        const decompressed = zlib.inflateSync(compressedData);

        // Deserialize protocol buffer
        const movieEntity = svga.com.opensource.svga.MovieEntity.deserializeBinary(decompressed);

        // Access animation properties
        const params = movieEntity.getParams();
        console.log(`Canvas: ${params.getViewboxwidth()}x${params.getViewboxheight()}`);
        console.log(`FPS: ${params.getFps()}, Frames: ${params.getFrames()}`);

        // Iterate through sprites
        const sprites = movieEntity.getSpritesList();
        sprites.forEach((sprite, index) => {
            console.log(`Sprite ${index}: ${sprite.getImagekey()}`);
            console.log(`  Frame count: ${sprite.getFramesList().length}`);

            // Access first frame properties
            const frame = sprite.getFramesList()[0];
            if (frame) {
                console.log(`  Alpha: ${frame.getAlpha()}`);
                const transform = frame.getTransform();
                console.log(`  Position: (${transform.getTx()}, ${transform.getTy()})`);
            }
        });

        // Extract image data
        const images = movieEntity.getImagesMap();
        images.forEach((imageData, key) => {
            console.log(`Image: ${key}, Size: ${imageData.length} bytes`);
            // imageData is Uint8Array of PNG binary
            fs.writeFileSync(`extracted_${key}`, Buffer.from(imageData));
        });

        return movieEntity;
    } catch (error) {
        console.error('Failed to load SVGA:', error);
        throw error;
    }
}

// Usage
loadSVGA('animation.svga').then(movie => {
    console.log('Successfully loaded SVGA animation');
});

```

--------------------------------

### Create Bouncing Ball Animation in Java

Source: https://context7.com/svga/svga-format/llms.txt

Demonstrates the creation of a complete SVGA animation with physics-based movement. This code generates a bouncing ball using vector graphics and simulates its motion over a specified number of frames. It utilizes the SVGA protobuf definitions for constructing the animation data.

```java
import com.opensource.svgaplayer.proto.Svga.*;
import com.google.protobuf.ByteString;
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Paths;

public class BouncingBallAnimation {

    public static MovieEntity createBouncingBall() throws IOException {
        int totalFrames = 60;
        int fps = 30;
        float canvasWidth = 400.0f;
        float canvasHeight = 400.0f;
        float ballRadius = 20.0f;

        // Animation parameters
        MovieParams params = MovieParams.newBuilder()
            .setViewBoxWidth(canvasWidth)
            .setViewBoxHeight(canvasHeight)
            .setFps(fps)
            .setFrames(totalFrames)
            .build();

        // Create vector ball sprite
        SpriteEntity.Builder ballSprite = SpriteEntity.newBuilder()
            .setImageKey("ball.vector");

        // Physics simulation parameters
        float gravity = 0.5f;
        float velocity = 0.0f;
        float posY = 50.0f;
        float posX = canvasWidth / 2;
        float bounce = 0.8f;

        // Generate frames with physics
        for (int frame = 0; frame < totalFrames; frame++) {
            // Apply gravity
            velocity += gravity;
            posY += velocity;

            // Bounce off ground
            if (posY > canvasHeight - ballRadius) {
                posY = canvasHeight - ballRadius;
                velocity *= -bounce;
            }

            // Create circle shape
            ShapeEntity circle = ShapeEntity.newBuilder()
                .setType(ShapeEntity.ShapeType.ELLIPSE)
                .setEllipse(ShapeEntity.EllipseArgs.newBuilder()
                    .setX(0.0f)
                    .setY(0.0f)
                    .setRadiusX(ballRadius)
                    .setRadiusY(ballRadius))
                .setStyles(ShapeEntity.ShapeStyle.newBuilder()
                    .setFill(ShapeEntity.ShapeStyle.RGBAColor.newBuilder()
                        .setR(1.0f).setG(0.3f).setB(0.0f).setA(1.0f))
                    .setStroke(ShapeEntity.ShapeStyle.RGBAColor.newBuilder()
                        .setR(0.5f).setG(0.15f).setB(0.0f).setA(1.0f))
                    .setStrokeWidth(2.0f))
                .setTransform(Transform.newBuilder() 
                    .setA(1.0f).setD(1.0f)
                    .setTx(0.0f).setTy(0.0f))
                .build();

            // Create frame
            FrameEntity frameEntity = FrameEntity.newBuilder()
                .setAlpha(1.0f)
                .setLayout(Layout.newBuilder()
                    .setX(0).setY(0)
                    .setWidth(ballRadius * 2)
                    .setHeight(ballRadius * 2))
                .setTransform(Transform.newBuilder()
                    .setA(1.0f).setD(1.0f)
                    .setTx(posX).setTy(posY))
                .addShapes(circle)
                .build();

            ballSprite.addFrames(frameEntity);
        }

        // Build and return movie
        return MovieEntity.newBuilder()
            .setVersion("2.0.0")
            .setParams(params)
            .addSprites(ballSprite)
            .build();
    }

    public static void saveToFile(MovieEntity movie, String filename) throws IOException {
        byte[] data = movie.toByteArray();

        // Compress with zlib
        java.util.zip.Deflater deflater = new java.util.zip.Deflater();
        deflater.setInput(data);
        deflater.finish();

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        while (!deflater.finished()) {
            int count = deflater.deflate(buffer);
            baos.write(buffer, 0, count);
        }

        Files.write(Paths.get(filename), baos.toByteArray());
        System.out.println("Saved: " + filename);
    }

    public static void main(String[] args) throws IOException {
        MovieEntity animation = createBouncingBall();
        saveToFile(animation, "bouncing_ball.svga");
    }
}

```

--------------------------------

### Define Sprite and Frame Entities for Animation

Source: https://context7.com/svga/svga-format/llms.txt

Defines the structure for `SpriteEntity` and `FrameEntity` within the SVGA format using Protocol Buffers. `SpriteEntity` references an image and contains per-frame definitions, while `FrameEntity` specifies properties like alpha, layout, transform, clipping paths, and shapes for each frame. This enables detailed animation control.

```protobuf
message SpriteEntity {
    string imageKey = 1;                // Reference to images map key
    repeated FrameEntity frames = 2;    // Per-frame property definitions
    string matteKey = 3;                // Matte layer key for masking
}

message FrameEntity {
    float alpha = 1;                    // Opacity [0.0 - 1.0]
    Layout layout = 2;                  // Bounding box constraint
    Transform transform = 3;            // 2D affine transformation matrix
    string clipPath = 4;                // SVG path for clipping mask
    repeated ShapeEntity shapes = 5;    // Vector shapes for .vector sprites
}

message Layout {
    float x = 1;
    float y = 2;
    float width = 3;
    float height = 4;
}

message Transform {
    float a = 1;    // Scale X & skew
    float b = 2;    // Skew
    float c = 3;    // Skew
    float d = 4;    // Scale Y & skew
    float tx = 5;   // Translate X
    float ty = 6;   // Translate Y
}
```

```protobuf
// Example: Creating an animated sprite
SpriteEntity.Builder sprite = SpriteEntity.newBuilder();sprite.setImageKey("character.png");

// Frame 0: Initial position
FrameEntity frame0 = FrameEntity.newBuilder()
    .setAlpha(1.0f)
    .setLayout(Layout.newBuilder()
        .setX(0).setY(0)
        .setWidth(100).setHeight(100))
    .setTransform(Transform.newBuilder()
        .setA(1.0f).setD(1.0f)  // Identity scale
        .setTx(50.0f).setTy(50.0f))  // Position
    .build();

// Frame 1: Moved and scaled
FrameEntity frame1 = FrameEntity.newBuilder()
    .setAlpha(0.8f)
    .setLayout(Layout.newBuilder()
        .setX(0).setY(0)
        .setWidth(100).setHeight(100))
    .setTransform(Transform.newBuilder()
        .setA(1.5f).setD(1.5f)  // 150% scale
        .setTx(100.0f).setTy(50.0f))  // New position
    .build();
sprite.addFrames(frame0).addFrames(frame1);
```

--------------------------------

### Define Vector Shapes (Protobuf)

Source: https://context7.com/svga/svga-format/llms.txt

Defines `ShapeEntity` for rendering vector graphics like SVG paths, rectangles with rounded corners, and ellipses. It includes detailed styling options for fills, strokes, and line patterns. This definition is crucial for vector-based animation playback.

```protobuf
message ShapeEntity {
    enum ShapeType {
        SHAPE = 0;      // SVG path
        RECT = 1;       // Rectangle
        ELLIPSE = 2;    // Ellipse/circle
        KEEP = 3;       // Reuse previous frame's shape
    }

    message ShapeArgs {
        string d = 1;   // SVG path data (e.g., "M 0 0 L 100 100")
    }

    message RectArgs {
        float x = 1;
        float y = 2;
        float width = 3;
        float height = 4;
        float cornerRadius = 5;  // Rounded corners
    }

    message EllipseArgs {
        float x = 1;            // Center X
        float y = 2;            // Center Y
        float radiusX = 3;      // Horizontal radius
        float radiusY = 4;      // Vertical radius
    }

    message ShapeStyle {
        message RGBAColor {
            float r = 1;  // [0.0 - 1.0]
            float g = 2;
            float b = 3;
            float a = 4;  // Alpha
        }

        enum LineCap { LineCap_BUTT = 0; LineCap_ROUND = 1; LineCap_SQUARE = 2; }
        enum LineJoin { LineJoin_MITER = 0; LineJoin_ROUND = 1; LineJoin_BEVEL = 2; }

        RGBAColor fill = 1;         // Fill color
        RGBAColor stroke = 2;       // Stroke color
        float strokeWidth = 3;      // Stroke width in points
        LineCap lineCap = 4;
        LineJoin lineJoin = 5;
        float miterLimit = 6;
        float lineDashI = 7;        // Dash length
        float lineDashII = 8;       // Gap length
        float lineDashIII = 9;      // Dash offset
    }

    ShapeType type = 1;
    oneof args {
        ShapeArgs shape = 2;
        RectArgs rect = 3;
        EllipseArgs ellipse = 4;
    }
    ShapeStyle styles = 10;
    Transform transform = 11;
}
```

--------------------------------

### SVGA 1.x Legacy JSON Format Specification

Source: https://context7.com/svga/svga-format/llms.txt

Defines the structure of a legacy SVGA animation file using JSON. This format is deprecated but supported for backward compatibility. It specifies movie properties, image assets, and sprite definitions, including layout and transformations.

```json
{
    "ver": "1.1.0",
    "movie": {
        "viewBox": {
            "width": 300.0,
            "height": 300.0
        },
        "fps": 20,
        "frames": 144
    },
    "images": {
        "character_idle": "character_idle.png",
        "background": "bg.png"
    },
    "sprites": [
        {
            "imageKey": "background",
            "frames": [
                {
                    "alpha": 1.0,
                    "layout": {
                        "x": 0,
                        "y": 0,
                        "width": 300,
                        "height": 300
                    },
                    "transform": {
                        "a": 1.0,
                        "b": 0.0,
                        "c": 0.0,
                        "d": 1.0,
                        "tx": 0.0,
                        "ty": 0.0
                    }
                }
            ]
        },
        {
            "imageKey": "character_idle.vector",
            "frames": [
                {
                    "alpha": 1.0,
                    "layout": {"x": 0, "y": 0, "width": 100, "height": 100},
                    "transform": {"a": 1.0, "b": 0.0, "c": 0.0, "d": 1.0, "tx": 100.0, "ty": 150.0},
                    "clipPath": "M 0 0 L 100 0 L 100 100 L 0 100 Z",
                    "shapes": [
                        {
                            "type": "rect",
                            "args": {
                                "x": 10.0,
                                "y": 10.0,
                                "width": 80.0,
                                "height": 80.0,
                                "cornerRadius": 5.0
                            },
                            "styles": {
                                "fill": [1.0, 0.5, 0.0, 1.0],
                                "stroke": [0.0, 0.0, 0.0, 1.0],
                                "strokeWidth": 2.0,
                                "lineCap": "round",
                                "lineJoin": "miter",
                                "miterLimit": 4.0,
                                "lineDash": [0.0, 0.0, 0.0]
                            },
                            "transform": {"a": 1.0, "b": 0.0, "c": 0.0, "d": 1.0, "tx": 0.0, "ty": 0.0}
                        }
                    ]
                }
            ]
        }
    ]
}
```

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