v0.0.488 fix wpdf with 16bpp images

ginext/cors.go

@@ -6,11 +6,14 @@ import (
 	"strings"
 )
 
-func CorsMiddleware(header []string) gin.HandlerFunc {
+func CorsMiddleware(allowheader []string, exposeheader []string) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
 		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
-		c.Writer.Header().Set("Access-Control-Allow-Headers", strings.Join(header, ", "))
+		c.Writer.Header().Set("Access-Control-Allow-Headers", strings.Join(allowheader, ", "))
+		if len(exposeheader) > 0 {
+			c.Writer.Header().Set("Access-Control-Expose-Headers", strings.Join(exposeheader, ", "))
+		}
 		c.Writer.Header().Set("Access-Control-Allow-Methods", "OPTIONS, GET, POST, PUT, PATCH, DELETE, COUNT")
 
 		if c.Request.Method == "OPTIONS" {

ginext/engine.go

@@ -22,6 +22,7 @@ type GinWrapper struct {
 	opt                   Options
 	allowCors             bool
 	corsAllowHeader       []string
+	corsExposeHeader      []string
 	ginDebug              bool
 	bufferBody            bool
 	requestTimeout        time.Duration
@@ -43,6 +44,7 @@ type ginRouteSpec struct {
 type Options struct {
 	AllowCors                *bool                                                          // Add cors handler to allow all CORS requests on the default http methods
 	CorsAllowHeader          *[]string                                                      // override the default values of Access-Control-Allow-Headers (AllowCors must be true)
+	CorsExposeHeader         *[]string                                                      // return Access-Control-Expose-Headers (AllowCors must be true)
 	GinDebug                 *bool                                                          // Set gin.debug to true (adds more logs)
 	SuppressGinLogs          *bool                                                          // Suppress our custom gin logs (even if GinDebug == true)
 	BufferBody               *bool                                                          // Buffers the input body stream, this way the ginext error handler can later include the whole request body
@@ -78,6 +80,7 @@ func NewEngine(opt Options) *GinWrapper {
 		suppressGinLogs:       langext.Coalesce(opt.SuppressGinLogs, false),
 		allowCors:             langext.Coalesce(opt.AllowCors, false),
 		corsAllowHeader:       langext.Coalesce(opt.CorsAllowHeader, []string{"Content-Type", "Content-Length", "Accept-Encoding", "X-CSRF-Token", "Authorization", "accept", "origin", "Cache-Control", "X-Requested-With"}),
+		corsExposeHeader:      langext.Coalesce(opt.CorsExposeHeader, []string{}),
 		ginDebug:              ginDebug,
 		bufferBody:            langext.Coalesce(opt.BufferBody, false),
 		requestTimeout:        langext.Coalesce(opt.Timeout, 24*time.Hour),
@@ -90,7 +93,7 @@ func NewEngine(opt Options) *GinWrapper {
 	engine.RedirectTrailingSlash = false
 
 	if wrapper.allowCors {
-		engine.Use(CorsMiddleware(wrapper.corsAllowHeader))
+		engine.Use(CorsMiddleware(wrapper.corsAllowHeader, wrapper.corsExposeHeader))
 	}
 
 	if ginDebug && !wrapper.suppressGinLogs {

goextVersion.go

@@ -1,5 +1,5 @@
 package goext
 
-const GoextVersion = "0.0.486"
+const GoextVersion = "0.0.488"
 
-const GoextVersionTimestamp = "2024-07-18T17:29:18+0200"
+const GoextVersionTimestamp = "2024-07-22T15:16:28+0200"

wpdf/wpdfImage.go

@@ -7,6 +7,7 @@ import (
 	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 	"image"
 	"image/color"
+	"image/draw"
 	"net/http"
 )
 
@@ -284,6 +285,13 @@ func (b *WPDFBuilder) Image(img *PDFImageRef, opts ...*PDFImageOpt) {
 			}
 		}
 
+		if dataimg.ColorModel() != color.RGBAModel && dataimg.ColorModel() != color.NRGBAModel {
+			// the image cannto be 16bpp or similar - otherwise fpdf errors out
+			dataImgRGBA := image.NewNRGBA(image.Rect(0, 0, dataimg.Bounds().Dx(), dataimg.Bounds().Dy()))
+			draw.Draw(dataImgRGBA, dataImgRGBA.Bounds(), dataimg, dataimg.Bounds().Min, draw.Src)
+			dataimg = dataImgRGBA
+		}
+
 		bfr, imgMime, err := imageext.EncodeImage(dataimg, compression)
 		if err != nil {
 			b.b.SetError(err)