From aa9e2e888ef7eaca961e6d7c17ec1ebab0469e54 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Fri, 20 Nov 2020 10:33:31 +0100
Subject: Fix for issue #159 - continued

Changes here concentrate the fix within static function alpha_blend() and thus
are visible only when drawing transparent images under X11 platform
without Xrender.
---
 src/fl_read_image.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/fl_read_image.cxx')

diff --git a/src/fl_read_image.cxx b/src/fl_read_image.cxx
index 90cefe5a7..de6907fe4 100644
--- a/src/fl_read_image.cxx
+++ b/src/fl_read_image.cxx
@@ -50,7 +50,7 @@ uchar *fl_read_image(uchar *p, int X, int Y, int w, int h, int alpha) {
     img = Fl_Screen_Driver::traverse_to_gl_subwindows(Fl_Window::current(), X, Y, w, h, NULL);
   }
   int depth = alpha ? 4 : 3;
-  if (img->d() != depth) {
+  if (img && img->d() != depth) {
     uchar *data = new uchar[img->w() * img->h() * depth];
     if (depth == 4) memset(data, alpha, img->w() * img->h() * depth);
     uchar *d = data;
-- 
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