| 55 | } |
| 56 | |
| 57 | func inlineImageFromBase64(name, mimeType, b64 string) (inlineImage, bool) { |
| 58 | if strings.TrimSpace(b64) == "" { |
| 59 | return inlineImage{}, false |
| 60 | } |
| 61 | |
| 62 | data, err := base64.StdEncoding.DecodeString(b64) |
| 63 | if err != nil { |
| 64 | return inlineImage{}, false |
| 65 | } |
| 66 | if mimeType == "" { |
| 67 | mimeType = chat.DetectMimeTypeByContent(data) |
| 68 | } |
| 69 | if !chat.IsImageMimeType(mimeType) { |
| 70 | return inlineImage{}, false |
| 71 | } |
| 72 | if resized, err := chat.ResizeImage(data, mimeType); err == nil { |
| 73 | data = resized.Data |
| 74 | mimeType = resized.MimeType |
| 75 | } |
| 76 | |
| 77 | img, _, err := image.Decode(bytes.NewReader(data)) |
| 78 | if err != nil { |
| 79 | return inlineImage{}, false |
| 80 | } |
| 81 | bounds := img.Bounds() |
| 82 | |
| 83 | var pngBuf bytes.Buffer |
| 84 | if err := png.Encode(&pngBuf, img); err != nil { |
| 85 | return inlineImage{}, false |
| 86 | } |
| 87 | |
| 88 | return inlineImage{ |
| 89 | name: name, |
| 90 | mime: mimeType, |
| 91 | pngData: pngBuf.Bytes(), |
| 92 | width: bounds.Dx(), |
| 93 | height: bounds.Dy(), |
| 94 | }, true |
| 95 | } |
| 96 | |
| 97 | func renderInlineImage(img inlineImage, width int) []string { |
| 98 | if len(img.pngData) == 0 || img.width <= 0 || img.height <= 0 { |