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images.Text: Add option for vertical alignment #13415

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images.Text: Add option for vertical alignment #13415

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3 changes: 3 additions & 0 deletions docs/content/en/functions/images/Text.md
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,9 @@ alignx
{{< new-in 0.141.0 />}}
: (`string`) The horizontal alignment of the text relative to the horizontal offset, one of `left`, `center`, or `right`. Default is `left`.

aligny
: (`string`) The vertical alignment of the text relative to the vertical offset, one of `top`, `center`, or `bottom`. Default is `top`.

color
: (`string`) The font color, either a 3-digit or 6-digit hexadecimal color code. Default is `#ffffff` (white).

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6 changes: 6 additions & 0 deletions resources/images/filters.go
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Expand Up @@ -79,6 +79,7 @@ func (*Filters) Text(text string, options ...any) gift.Filter {
x: 10,
y: 10,
alignx: "left",
aligny: "top",
linespacing: 2,
}

Expand All @@ -102,6 +103,11 @@ func (*Filters) Text(text string, options ...any) gift.Filter {
if tf.alignx != "left" && tf.alignx != "center" && tf.alignx != "right" {
panic("alignx must be one of left, center, right")
}
case "aligny":
tf.aligny = cast.ToString(v)
if tf.aligny != "top" && tf.aligny != "center" && tf.aligny != "bottom" {
panic("aligny must be one of top, center, bottom")
}

case "linespacing":
tf.linespacing = cast.ToInt(v)
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16 changes: 12 additions & 4 deletions resources/images/text.go
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Expand Up @@ -36,6 +36,7 @@ type textFilter struct {
color color.Color
x, y int
alignx string
aligny string
size float64
linespacing int
fontSource hugio.ReadSeekCloserProvider
Expand Down Expand Up @@ -110,12 +111,19 @@ func (f textFilter) Draw(dst draw.Image, src image.Image, options *gift.Options)
}
finalLines = append(finalLines, currentLine)
}
// Total height of the text from the top of the first line to the baseline of the last line
totalHeight := len(finalLines)*fontHeight + (len(finalLines)-1)*f.linespacing

// Correct y position based on font and size
f.y = f.y + fontHeight

// Start position
y := f.y
y := f.y + fontHeight
switch f.aligny {
case "top":
// Do nothing
case "center":
y = y - totalHeight/2
case "bottom":
y = y - totalHeight
}

// Draw text line by line
for _, line := range finalLines {
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