Fix comments

The comments in zinitgrpahics and the PostScript definition of
initgraphics in gs_cspace.ps were incorrect, now that gs_initgraphics
does reset the colour space properly.

However, we do still need the /initgraphics override in gs_cspace.ps
in order to correctly set the colour space which we store in the
'interpreter' graphics state. We only use that to hand back in response
to a currentcolorspace, but we do need it.

2 files changed, 8 insertions, 4 deletions

diff --git a/Resource/Init/gs_cspace.ps b/Resource/Init/gs_cspace.ps
index 35e4da182..c612ea9ac 100644
--- a/Resource/Init/gs_cspace.ps
+++ b/Resource/Init/gs_cspace.ps
@@ -64,8 +64,10 @@ end % colorspacedict
 %
 %   -   initgraphics   -
 %
-% The internal routine gs_initgraphics doesn't (re)set the color space,
-% so we must redefine the operation to do it here.
+% Although the internal routine gs_initgraphics resets the color space,
+% it does not reset the color space we store in the 'interpreter'
+% graphics state (so that we can hand it back in currentcolorspace).
+% So we need to do that in the PostScript world.
 %
 %
 /initgraphics
diff --git a/psi/zgstate.c b/psi/zgstate.c
index 254335c0e..b7ee61c43 100644
--- a/psi/zgstate.c
+++ b/psi/zgstate.c
@@ -188,8 +188,10 @@ static int
 zinitgraphics(i_ctx_t *i_ctx_p)
 {
     /*
-     * gs_initigraphics does not reset the colorspace;
-     * this is now handled in the PostScript code.
+     * Although gs_initgraphics resets the color space to DeviceGray, it does
+     * not modify the 'interpreter' gstate, which stores a copy of the PostScript
+     * object used to set the colour space. We could do this here, with effort,
+     * but instead we choose t do it in gs_cspace.ps and handle it all in PostScript.
      */
      make_empty_array(&istate->dash_pattern_array, a_all);
      return gs_initgraphics(igs);