Add `image.destroy`

core/image/common.odin

@@ -54,6 +54,7 @@ Image :: struct {
 	*/
 	background:    Maybe(RGB_Pixel_16),
 	metadata:      Image_Metadata,
+	which:         Which_File_Type,
 }
 
 Image_Metadata :: union {

core/image/general_loader.odin

@@ -43,3 +43,16 @@ load_from_file :: proc(filename: string, options := Options{}, allocator := cont
 		return nil, .Unable_To_Read_File
 	}
 }
+
+destroy :: proc(img: ^Image, allocator := context.allocator) -> bool {
+	if img == nil {
+		return true
+	}
+	context.allocator = allocator
+	destroyer := _internal_destroyers[img.which]
+	if destroyer != nil {
+		destroyer(img)
+	}
+	free(img)
+	return true
+}

core/image/netpbm/netpbm.odin

@@ -47,6 +47,7 @@ load_from_bytes :: proc(data: []byte, allocator := context.allocator) -> (img: ^
 	context.allocator = allocator
 
 	img = new(Image)
+	img.which = .NetPBM
 
 	header: Header; defer header_destroy(&header)
 	header_size: int
@@ -758,9 +759,5 @@ _register :: proc() {
 	destroyer :: proc(img: ^Image) {
 		_ = destroy(img)
 	}
-	image.register(.PBM, loader, destroyer)
-	image.register(.PGM, loader, destroyer)
-	image.register(.PPM, loader, destroyer)
-	image.register(.PAM, loader, destroyer)
-	image.register(.PFM, loader, destroyer)
+	image.register(.NetPBM, loader, destroyer)
 }

core/image/png/png.odin

@@ -372,6 +372,7 @@ load_from_context :: proc(ctx: ^$C, options := Options{}, allocator := context.a
 	if img == nil {
 		img = new(Image)
 	}
+	img.which = .PNG
 
 	info := new(image.PNG_Info)
 	img.metadata = info

core/image/qoi/qoi.odin

@@ -224,6 +224,7 @@ load_from_context :: proc(ctx: ^$C, options := Options{}, allocator := context.a
 	if img == nil {
 		img = new(Image)
 	}
+	img.which = .QOI
 
 	if .return_metadata in options {
 		info := new(image.QOI_Info)

core/image/which.odin

@@ -14,7 +14,7 @@ Which_File_Type :: enum {
 	JPEG,
 	JPEG_2000,
 	JPEG_XL,
-	PBM, PGM, PPM, PAM, PFM, // NetPBM family
+	NetPBM, // NetPBM family
 	PIC, // Softimage PIC
 	PNG, // Portable Network Graphics
 	PSD, // Photoshop PSD
@@ -111,16 +111,16 @@ which_bytes :: proc(data: []byte) -> Which_File_Type {
 		switch s[2] {
 		case '\t', '\n', '\r':
 			switch s[1] {
-			case '1', '4':
-				return .PBM
-			case '2', '5':
-				return .PGM
-			case '3', '6':
-				return .PPM
-			case '7':
-				return .PAM
-			case 'F', 'f':
-				return .PFM
+			case '1', '4': // PBM
+				return .NetPBM
+			case '2', '5': // PGM
+				return .NetPBM
+			case '3', '6': // PPM
+				return .NetPBM
+			case '7':      // PAM
+				return .NetPBM
+			case 'F', 'f': // PFM
+				return .NetPBM
 			}
 		}
 	case s[:8] == "\x89PNG\r\n\x1a\n":