GraphicsMagick: coders/wpg.c Fixed Monochromatic bilevel WPG sho...

changeset 1d0fd7d1152c in /hg/GraphicsMagick
details: http://hg.GraphicsMagick.org/hg/GraphicsMagick?cmd=changeset;node=1d0fd7d1152c
summary: coders/wpg.c Fixed Monochromatic bilevel WPG should answer to gm identify file.wpg ..... PseudoClass 2c 8-bit

diffstat:

 ChangeLog    |   5 +++++
 coders/wpg.c |  10 +++++++++-
 2 files changed, 14 insertions(+), 1 deletions(-)

diffs (32 lines):

diff -r d2698b7e3232 -r 1d0fd7d1152c ChangeLog
--- a/ChangeLog	Mon Jan 09 08:23:29 2023 -0600
+++ b/ChangeLog	Wed Jan 11 09:50:33 2023 +0100
@@ -1,3 +1,8 @@
+2023-01-11  Fojtik Jaroslav  <[email protected]>
+
+	* coders/wpg.c Fixed Monochromatic bilevel WPG should answer to 
+	gm identify file.wpg ..... PseudoClass 2c 8-bit
+
 2023-01-08  Fojtik Jaroslav  <[email protected]>
 
 	* coders/wpg.c Fixed deffect in WPG header reading.
diff -r d2698b7e3232 -r 1d0fd7d1152c coders/wpg.c
--- a/coders/wpg.c	Mon Jan 09 08:23:29 2023 -0600
+++ b/coders/wpg.c	Wed Jan 11 09:50:33 2023 +0100
@@ -1339,7 +1339,15 @@
               image->rows=BitmapHeader1.Heigth;
               bpp=BitmapHeader1.Depth;
 				// Whole palette is useless for bilevel image.
-              if(bpp==1) image->storage_class=DirectClass;
+              if(bpp==1)
+              {
+                image->storage_class = PseudoClass;
+                image->colors = 2;
+                if (!AllocateImageColormap(image,2)) goto NoMemory;
+                image->colormap[0].red = image->colormap[0].green = image->colormap[0].blue = 0;
+                image->colormap[1].red = image->colormap[1].green = image->colormap[1].blue = MaxRGB;
+                image->colormap[0].opacity = image->colormap[1].opacity = OpaqueOpacity;
+              }
               goto UnpackRaster;
 
             case 0x0E:  /*Color palette */