dragonbones-runtime/.cache/egret-core-5.1.0/src/egret/native/NativeTexture.ts

the tools to build dragonbones file for diffrent framework

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namespace egret.native {

    /**
     * @private
     */
    function convertImageToRenderTexture(texture: egret.Texture, rect?: egret.Rectangle): NativeCanvasRenderBuffer {
        let buffer = <NativeCanvasRenderBuffer><any>sys.canvasHitTestBuffer;
        let w = texture.$getTextureWidth();
        let h = texture.$getTextureHeight();
        if (rect == null) {
            rect = egret.$TempRectangle;
            rect.x = 0;
            rect.y = 0;
            rect.width = w;
            rect.height = h;
        }

        rect.x = Math.min(rect.x, w - 1);
        rect.y = Math.min(rect.y, h - 1);
        rect.width = Math.min(rect.width, w - rect.x);
        rect.height = Math.min(rect.height, h - rect.y);

        let iWidth = rect.width;
        let iHeight = rect.height;
        let surface = buffer.surface;
        buffer.resize(iWidth, iHeight);

        let bitmapData = texture;
        let offsetX: number = Math.round(bitmapData.$offsetX);
        let offsetY: number = Math.round(bitmapData.$offsetY);
        let bitmapWidth: number = bitmapData.$bitmapWidth;
        let bitmapHeight: number = bitmapData.$bitmapHeight;
        buffer.context.drawImage(bitmapData.$bitmapData.source, bitmapData.$bitmapX + rect.x / $TextureScaleFactor, bitmapData.$bitmapY + rect.y / $TextureScaleFactor,
            bitmapWidth * rect.width / w, bitmapHeight * rect.height / h, offsetX, offsetY, rect.width, rect.height);

        return buffer;
    }

    /**
     * @private
     */
    function toDataURL(type: string, rect?: egret.Rectangle, encoderOptions?): string {
        try {
            let buffer = convertImageToRenderTexture(this, rect);
            //todo encoderOptions
            let base64 = buffer.toDataURL(type);
            return base64
        }
        catch (e) {
            egret.$error(1033);
            return null;
        }
    }


    function saveToFile(type: string, filePath: string, rect?: egret.Rectangle): void {
        try {
            let buffer = convertImageToRenderTexture(this, rect);
            buffer.surface.saveToFile(type, filePath);
        }
        catch (e) {
            egret.$error(1033);
        }
    }

    function getPixel32(x: number, y: number): number[] {
        egret.$warn(1041, "getPixel32", "getPixels");
        return this.getPixels(x, y);
    }

    function getPixels(x: number, y: number, width: number = 1, height: number = 1): number[] {
        let self = this;
        if ((<RenderTexture>self).$renderBuffer) {
            return (<RenderTexture>self).$renderBuffer.getPixels(x, y, width, height);
        }
        else {
            try {
                let buffer = convertImageToRenderTexture(this);
                return buffer.getPixels(x, y, width, height);
            }
            catch (e) {
                egret.$error(1033);
            }
        }
    }

    Texture.prototype.toDataURL = toDataURL;
    Texture.prototype.saveToFile = saveToFile;
    Texture.prototype.getPixel32 = getPixel32;
    Texture.prototype.getPixels = getPixels;
}