[gegl] gegl: include math.h in headers used by ops

[Øyvind "pippin" Kolås <ok src gnome org>]

commit a3c57eb512ceacc1934085ed751a4dd4801eefba
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu May 28 21:15:17 2020 +0200

    gegl: include math.h in headers used by ops
    
    It needs to be included before gegl-math.h on some platforms, since many
    operations do use such functions for -lm including it is boilerplate
    reduction.

 gegl/gegl-plugin.h                | 1 +
 operations/common/color-overlay.c | 2 +-
 operations/common/exp-combine.c   | 2 +-
 operations/common/little-planet.c | 4 ++--
 operations/common/long-shadow.c   | 2 +-
 operations/common/mono-mixer.c    | 8 ++++----
 6 files changed, 10 insertions(+), 9 deletions(-)
---
diff --git a/gegl/gegl-plugin.h b/gegl/gegl-plugin.h
index bffb310f0..b33c2b127 100644
--- a/gegl/gegl-plugin.h
+++ b/gegl/gegl-plugin.h
@@ -24,6 +24,7 @@
 #include "config.h"
 #endif
 
+#include <math.h>
 #include <string.h>
 #include <glib-object.h>
 #include <gmodule.h>
diff --git a/operations/common/color-overlay.c b/operations/common/color-overlay.c
index cd9489a1c..98ea64cb1 100644
--- a/operations/common/color-overlay.c
+++ b/operations/common/color-overlay.c
@@ -77,7 +77,7 @@ process (GeglOperation       *operation,
 
   alpha_c = 1.0f - color[3];
 
-  if (fabs (alpha_c) <= EPSILON)
+  if (fabsf (alpha_c) <= EPSILON)
     {
       while (samples--)
         {
diff --git a/operations/common/exp-combine.c b/operations/common/exp-combine.c
index 8f81124ab..3aecf2b54 100644
--- a/operations/common/exp-combine.c
+++ b/operations/common/exp-combine.c
@@ -1095,7 +1095,7 @@ gegl_expcombine_process (GeglOperation        *operation,
            */
           if (e->pixels[PIXELS_FULL][i] <= 0.0f)
             {
-              under += fabs (e->pixels[PIXELS_FULL][i]);
+              under += fabsf (e->pixels[PIXELS_FULL][i]);
               e->pixels[PIXELS_FULL][i] = 0.0f;
             }
           else if (e->pixels[PIXELS_FULL][i] > 1.0f)
diff --git a/operations/common/little-planet.c b/operations/common/little-planet.c
index bb6efe478..5389a5ff7 100644
--- a/operations/common/little-planet.c
+++ b/operations/common/little-planet.c
@@ -211,8 +211,8 @@ static void prepare_transform (Transform *transform,
     xoffset = ((orig_width - height)/height) / 2 + 0.5f;
   }
 
-  transform->do_spin = fabs (spin) > 0.000001 ? 1 : 0;
-  transform->do_zoom = fabs (zoom-1.0) > 0.000001 ? 1 : 0;
+  transform->do_spin = fabsf (spin) > 0.000001 ? 1 : 0;
+  transform->do_zoom = fabsf (zoom-1.0f) > 0.000001 ? 1 : 0;
 
   transform->pan         = pan;
   transform->tilt        = tilt;
diff --git a/operations/common/long-shadow.c b/operations/common/long-shadow.c
index 51a3b1e94..997fbeefc 100644
--- a/operations/common/long-shadow.c
+++ b/operations/common/long-shadow.c
@@ -376,7 +376,7 @@ init_geometry (Context *ctx)
     {
       ctx->shadow_proj = cos (ctx->options.angle) * ctx->options.length;
 
-      ctx->shadow_height    = ceil (ctx->shadow_proj);
+      ctx->shadow_height    = ceilf (ctx->shadow_proj);
       ctx->shadow_remainder = 1.0 - (ctx->shadow_height - ctx->shadow_proj);
     }
 }
diff --git a/operations/common/mono-mixer.c b/operations/common/mono-mixer.c
index f78b45527..de31e7a33 100644
--- a/operations/common/mono-mixer.c
+++ b/operations/common/mono-mixer.c
@@ -66,7 +66,7 @@ process (GeglOperation       *op,
   gfloat      green       = o->green;
   gfloat      blue        = o->blue;
   gboolean    normalize   = o->preserve_luminosity;
-  gfloat      norm_factor = 1.0;
+  gfloat      norm_factor = 1.0f;
   gfloat     * GEGL_ALIGNED in_pixel;
   gfloat     * GEGL_ALIGNED out_pixel;
   glong       i;
@@ -78,10 +78,10 @@ process (GeglOperation       *op,
    {
      gdouble sum = red + green + blue;
 
-     if (sum == 0.0)
-       norm_factor = 1.0;
+     if (sum == 0.0f)
+       norm_factor = 1.0f;
      else
-       norm_factor = fabs (1 / sum);
+       norm_factor = fabsf (1.0 / sum);
    }
 
   for (i=0; i<n_pixels; i++)