TekH
f1c8e223dd
Updated the `ComposeSignaturePreviewPng` method in the `IPdfPageImageRenderer` interface to return a `Stream` instead of a `byte[]` for improved memory efficiency when handling large image data. - Added `ComposeSignaturePreviewPngBytes` extension method to convert the `Stream` to a `byte[]` for backward compatibility. - Updated `PdfPageImageRenderer` to return a `Stream` and adjusted its internal logic to reset the `MemoryStream` position before returning. - Modified `DevSignatureInkController` to use the `Stream`-based implementation for HTTP responses. - Made minor formatting adjustments in `PdfPageImageRenderer`. These changes optimize memory usage while maintaining compatibility with existing workflows that require `byte[]`.
67 lines
1.9 KiB
C#
67 lines
1.9 KiB
C#
using DigitalData.Core.Exceptions;
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using EnvelopeGenerator.Application.Common.Dto;
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using EnvelopeGenerator.Domain.Interfaces;
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namespace EnvelopeGenerator.Application.Common.Interfaces.Doc;
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/// <summary>
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///
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/// </summary>
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public interface IPdfPageImageRenderer
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{
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/// <summary>
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///
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/// </summary>
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/// <param name="pdfBytes"></param>
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/// <param name="cancellationToken"></param>
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/// <returns></returns>
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Task<IReadOnlyList<PdfPageImageDto>> RenderPagesAsImagesAsync(byte[] pdfBytes, CancellationToken cancellationToken = default);
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/// <summary>
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///
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/// </summary>
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/// <param name="element"></param>
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/// <returns></returns>
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Stream ComposeSignaturePreviewPng(ISignatureInkPayload element);
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/// <summary>
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///
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/// </summary>
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/// <param name="bytes"></param>
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/// <returns></returns>
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public bool IsSupportedImageFormat(byte[] bytes);
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}
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/// <summary>
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///
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/// </summary>
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public static class PdfPageImageRendererExtensions
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{
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/// <summary>
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///
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/// </summary>
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/// <param name="renderer"></param>
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/// <param name="inkBytes"></param>
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/// <returns></returns>
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/// <exception cref="BadRequestException"></exception>
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public static byte[] EnsureSupportedImageBytes(this IPdfPageImageRenderer renderer, byte[] inkBytes)
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{
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if (!renderer.IsSupportedImageFormat(inkBytes))
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throw new BadRequestException("Only PNG and JPEG signature formats are supported.");
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return inkBytes;
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}
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public static byte[] ComposeSignaturePreviewPngBytes(this IPdfPageImageRenderer renderer, ISignatureInkPayload element)
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{
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using var stream = renderer.ComposeSignaturePreviewPng(element);
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if (stream is MemoryStream memoryStream)
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return memoryStream.ToArray();
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using var copy = new MemoryStream();
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stream.CopyTo(copy);
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return copy.ToArray();
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}
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}
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