syntax = "proto3";
package com.opensource.svga;
option objc_class_prefix = "SVGAProto";
option java_package = "com.opensource.svgaplayer.proto";

message MovieParams {
    float viewBoxWidth = 1;     // Canvas width
    float viewBoxHeight = 2;    // Canvas height
    int32 fps = 3;              // Animation frames per second, valid values are any of [1, 2, 3, 5, 6, 10, 12, 15, 20, 30, 60].
    int32 frames = 4;           // Total number of animation frames
}

message SpriteEntity {
    string imageKey = 1;                // Bitmap key name for the element. If imageKey has a .vector suffix, the sprite is a vector layer. If it has a .matte suffix, the sprite is a matte layer.
    repeated FrameEntity frames = 2;    // Frame list
    string matteKey = 3;                // The matteKey of the masked layer corresponds to the imageKey of its matte layer.
}

message AudioEntity {
    string audioKey = 1;        // Audio file name
    int32 startFrame = 2;       // Audio playback start frame
    int32 endFrame = 3;         // Audio playback end frame
    int32 startTime = 4;        // Audio playback start time (relative to audio length)
    int32 totalTime = 5;        // Total audio length
}

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

message Transform {
    float a = 1;
    float b = 2;
    float c = 3;
    float d = 4;
    float tx = 5;
    float ty = 6;
}

message ShapeEntity {

    enum ShapeType {
        SHAPE = 0;      // Path
        RECT = 1;       // Rectangle
        ELLIPSE = 2;    // Ellipse
        KEEP = 3;       // Same as previous frame
    }

    message ShapeArgs {
        string d = 1;   // SVG path
    }

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

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

    message ShapeStyle {

        message RGBAColor {
            float r = 1;
            float g = 2;
            float b = 3;
            float a = 4;
        }

        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
        LineCap lineCap = 4;        // Line cap style
        LineJoin lineJoin = 5;      // Line join style
        float miterLimit = 6;       // Miter limit
        float lineDashI = 7;        // Dash parameter
        float lineDashII = 8;       // Gap parameter
        float lineDashIII = 9;      // Offset parameter

    }

    ShapeType type = 1;                 // Vector type
    oneof args {
        ShapeArgs shape = 2;
        RectArgs rect = 3;
        EllipseArgs ellipse = 4;
    }                                   // Vector parameters
    ShapeStyle styles = 10;             // Render parameters
    Transform transform = 11;           // 2D transform matrix for vector layer
    
}

message FrameEntity {
    float alpha = 1;                    // Opacity
    Layout layout = 2;                  // Initial constraint size
    Transform transform = 3;            // 2D transform matrix
    string clipPath = 4;                // Mask path, use SVG standard Path to draw pattern for mask.
    repeated ShapeEntity shapes = 5;    // Vector element list
}

message MovieEntity {
    string version = 1;                 // SVGA format version
    MovieParams params = 2;             // Animation parameters
    map<string, bytes> images = 3;      // Key is bitmap key name, Value is bitmap file name or binary PNG data.
    repeated SpriteEntity sprites = 4;  // Element list
    repeated AudioEntity audios = 5;    // Audio list
}