From fdae2107d9340f575aa6f663d5332544969efeba Mon Sep 17 00:00:00 2001
From: mzernova <mzernova@opencascade.com>
Date: Tue, 10 Sep 2019 17:10:25 +0300
Subject: [PATCH] 0030946: Visualization - Image_AlienPixMap ignores 1-bit
 pixelformat when using FreeImage

Convert 1-bit image to 8-bit one during its loading because only greyscale images are supported by visualization
---
 src/Image/Image_AlienPixMap.cxx |  7 +++++++
 tests/bugs/vis/bug30946         | 14 ++++++++++++++
 2 files changed, 21 insertions(+)
 create mode 100644 tests/bugs/vis/bug30946

diff --git a/src/Image/Image_AlienPixMap.cxx b/src/Image/Image_AlienPixMap.cxx
index 0cbd6534d2..b38190195a 100644
--- a/src/Image/Image_AlienPixMap.cxx
+++ b/src/Image/Image_AlienPixMap.cxx
@@ -589,6 +589,13 @@ bool Image_AlienPixMap::Load (const Standard_Byte* theData,
     return false;
   }
 
+  if (FreeImage_GetBPP (anImage) == 1)
+  {
+    FIBITMAP* aTmpImage = FreeImage_ConvertTo8Bits (anImage);
+    FreeImage_Unload (anImage);
+    anImage = aTmpImage;
+  }
+
   Image_Format aFormat = convertFromFreeFormat (FreeImage_GetImageType(anImage),
                                                 FreeImage_GetColorType(anImage),
                                                 FreeImage_GetBPP      (anImage));
diff --git a/tests/bugs/vis/bug30946 b/tests/bugs/vis/bug30946
new file mode 100644
index 0000000000..605662c64c
--- /dev/null
+++ b/tests/bugs/vis/bug30946
@@ -0,0 +1,14 @@
+puts "============="
+puts "0030946: Visualization - Image_AlienPixMap ignores 1-bit pixelformat when using FreeImage"
+puts "============="
+
+pload VISUALIZATION
+vinit View
+
+vbackground -image [locate_data_file bug30946_img_1bit_256px.png]
+if { [vreadpixel 120 315 rgb name] != "WHITE" } { puts "Error: background image was loaded incorrectly" }
+
+vpoint p0 0 0 0
+vaspects p0 -setMarkerType [locate_data_file bug30946_img_1bit_32px.png]
+
+vdump $imagedir/${casename}.png