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server: use fixed-size social media images

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Signed-off-by: Naman Sood <mail@nsood.in>
This commit is contained in:
Naman Sood 2021-12-17 04:21:17 -05:00
parent ab6c3af0b7
commit bd28e62c33
1 changed files with 5 additions and 18 deletions
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23
server.go
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@ -4,7 +4,6 @@ import (
"bytes" "bytes"
"io" "io"
"log" "log"
"math"
"net/http" "net/http"
"strings" "strings"
"sync" "sync"
@ -206,15 +205,13 @@ func (s *server) loadStylesheet(res http.ResponseWriter, req *http.Request, file
} }
func createImage(title, summary, url string, out io.Writer) error { func createImage(title, summary, url string, out io.Writer) error {
imgWidth, imgPaddingX, imgPaddingY := 1200, 45, 90 imgWidth, imgHeight, imgPaddingX, imgPaddingY := 1200, 630, 45, 90
accentHeight := 7.5 accentHeight, spacerHeight := 7.5, 20.0
titleSize, summarySize, urlSize := 63.0, 42.0, 27.0 titleSize, summarySize, urlSize := 63.0, 42.0, 27.0
lineHeight := 1.5 lineHeight := 1.05
textWidth := float64(imgWidth - 2*imgPaddingX) textWidth := float64(imgWidth - 2*imgPaddingX)
// temporarily set height = 0 for context only used to generate draw := gg.NewContext(imgWidth, imgHeight)
// wrapped strings
draw := gg.NewContext(imgWidth, 0)
titleFont, err := gg.LoadFontFace("fonts/Nunito-Bold.ttf", titleSize) titleFont, err := gg.LoadFontFace("fonts/Nunito-Bold.ttf", titleSize)
if err != nil { if err != nil {
@ -234,17 +231,6 @@ func createImage(title, summary, url string, out io.Writer) error {
draw.SetFontFace(summaryFont) draw.SetFontFace(summaryFont)
wrappedSummary := draw.WordWrap(summary, textWidth) wrappedSummary := draw.WordWrap(summary, textWidth)
imgHeight := 2 * imgPaddingY
for range wrappedTitle {
imgHeight += int(math.Ceil(lineHeight * titleSize))
}
for range wrappedSummary {
imgHeight += int(math.Ceil(lineHeight * summarySize))
}
imgHeight += int(math.Ceil(lineHeight * urlSize))
// actual context with actual height
draw = gg.NewContext(imgWidth, imgHeight)
draw.SetHexColor("#fff") draw.SetHexColor("#fff")
draw.DrawRectangle(0, 0, float64(imgWidth), float64(imgHeight)) draw.DrawRectangle(0, 0, float64(imgWidth), float64(imgHeight))
draw.Fill() draw.Fill()
@ -260,6 +246,7 @@ func createImage(title, summary, url string, out io.Writer) error {
draw.DrawString(line, float64(imgPaddingX), offset) draw.DrawString(line, float64(imgPaddingX), offset)
offset += lineHeight * titleSize offset += lineHeight * titleSize
} }
offset += spacerHeight
draw.SetFontFace(summaryFont) draw.SetFontFace(summaryFont)
draw.SetHexColor("#999") draw.SetHexColor("#999")