evas: Refactor evas filters a bit

This is a preparation step for (experimental) textblock support.
Textblock objects won't have a single filter, and the buffer's
geometry wouldn't be that of of the object itself. Thus a few
internal APIs need to be reworked first.

10 files changed, 146 insertions, 106 deletions

diff --git a/src/Makefile_Evas.am b/src/Makefile_Evas.am
index 8b8186b4fd..c78a3982dd 100644
--- a/src/Makefile_Evas.am
+++ b/src/Makefile_Evas.am
@@ -2353,6 +2353,7 @@ tests/evas/evas_suite.h
 
 tests_evas_evas_suite_CPPFLAGS = -I$(top_builddir)/src/lib/efl \
 -I$(top_srcdir)/src/lib/ecore_evas \
+-I$(top_builddir)/src/lib/evas/canvas \
 -DTESTS_SRC_DIR=\"$(top_srcdir)/src/tests/evas\" \
 -DTESTS_BUILD_DIR=\"$(top_builddir)/src/tests/evas\" \
 @CHECK_CFLAGS@ \
diff --git a/src/lib/evas/canvas/efl_canvas_filter_internal.eo b/src/lib/evas/canvas/efl_canvas_filter_internal.eo
index 48bfd2685d..1f612701c5 100644
--- a/src/lib/evas/canvas/efl_canvas_filter_internal.eo
+++ b/src/lib/evas/canvas/efl_canvas_filter_internal.eo
@@ -1,3 +1,43 @@
+// import efl_gfx_types -> need to add Efl.Gfx.Color
+
+/* Everything in this file is internal to Evas. It is not meant to be used
+   from outside EFL itself! */
+
+struct Efl.Gfx.Color32
+{
+   r: uint8;
+   g: uint8;
+   b: uint8;
+   a: uint8;
+}
+
+struct Efl.Canvas.Filter.State_Name
+{
+   name: string;
+   value: double;
+}
+
+struct Efl.Canvas.Filter.State_Text
+{
+   outline: Efl.Gfx.Color32;
+   shadow: Efl.Gfx.Color32;
+   glow: Efl.Gfx.Color32;
+   glow2: Efl.Gfx.Color32;
+}
+
+struct Efl.Canvas.Filter.State
+{
+   [[Internal structure representing the state of a Gfx Filter]]
+   text: Efl.Canvas.Filter.State_Text;
+   color: Efl.Gfx.Color32;
+   cur: Efl.Canvas.Filter.State_Name;
+   next: Efl.Canvas.Filter.State_Name;
+   w: int;
+   h: int;
+   scale: double;
+   pos: double;
+}
+
 mixin Efl.Canvas.Filter.Internal (Efl.Gfx.Filter, Efl.Object)
 {
    [[Evas internal implementation of filters.]]
@@ -26,14 +66,21 @@ mixin Efl.Canvas.Filter.Internal (Efl.Gfx.Filter, Efl.Object)
          [[Called by Efl.Canvas.Filter.Internal to determine whether the input is alpha or rgba.]]
          return: bool; [[$true on success, $false otherwise]]
       }
+      filter_state_prepare @protected @pure_virtual {
+         [[Called by Efl.Canvas.Filter.Internal to request the parent class
+           for state information (color, etc...).]]
+         params {
+            @out state: Efl.Canvas.Filter.State; [[State info to fill in]]
+            @in data: void_ptr; [[Private data for the class]]
+         }
+      }
       filter_input_render @protected @pure_virtual {
-         [[Called by Efl.Canvas.Filter.Internal when the parent class must render the input.
-         ;
-         ]]
+         [[Called by Efl.Canvas.Filter.Internal when the parent class must render the input.]]
          return: bool; [[Indicates success from the object render function.]]
          params {
-            filter: void_ptr; [[Evas_Filter_Context]]
-            drawctx: void_ptr; [[Draw context]]
+            filter: void_ptr; [[Current filter context]]
+            drawctx: void_ptr; [[Draw context (for evas engine)]]
+            data: void_ptr; [[Arbitrary private data]]
             l: int; [[Left]]
             r: int; [[Right]]
             t: int; [[Top]]
diff --git a/src/lib/evas/canvas/efl_canvas_image_internal.eo b/src/lib/evas/canvas/efl_canvas_image_internal.eo
index 2101a564f0..420743ecd8 100644
--- a/src/lib/evas/canvas/efl_canvas_image_internal.eo
+++ b/src/lib/evas/canvas/efl_canvas_image_internal.eo
@@ -28,8 +28,9 @@ abstract Efl.Canvas.Image.Internal (Efl.Canvas.Object, Efl.Canvas.Filter.Interna
       Efl.Gfx.Fill.fill_auto { get; set; }
       Efl.Gfx.Filter.filter_program { set; }
       Efl.Gfx.View.view_size { get; }
+      Efl.Canvas.Filter.Internal.filter_dirty;
       Efl.Canvas.Filter.Internal.filter_input_alpha;
       Efl.Canvas.Filter.Internal.filter_input_render;
-      Efl.Canvas.Filter.Internal.filter_dirty;
+      Efl.Canvas.Filter.Internal.filter_state_prepare;
    }
 }
diff --git a/src/lib/evas/canvas/evas_filter_mixin.c b/src/lib/evas/canvas/evas_filter_mixin.c
index 94070ca331..3f211a4fab 100644
--- a/src/lib/evas/canvas/evas_filter_mixin.c
+++ b/src/lib/evas/canvas/evas_filter_mixin.c
@@ -150,6 +150,21 @@ _filter_source_hash_free_cb(void *data)
    free(pb);
 }
 
+static inline Eina_Bool
+_evas_filter_state_set_internal(Evas_Filter_Program *pgm, Evas_Filter_Data *pd)
+{
+   Efl_Canvas_Filter_State state = EFL_CANVAS_FILTER_STATE_DEFAULT;
+
+   evas_filter_state_prepare(pd->obj->object, &state, NULL);
+   state.cur.name = pd->data->state.cur.name;
+   state.cur.value = pd->data->state.cur.value;
+   state.next.name = pd->data->state.next.name;
+   state.next.value = pd->data->state.next.value;
+   state.pos = pd->data->state.pos;
+
+   return evas_filter_program_state_set(pgm, &state);
+}
+
 Eina_Bool
 evas_filter_object_render(Eo *eo_obj, Evas_Object_Protected_Data *obj,
                           void *output, void *context, void *surface,
@@ -196,13 +211,11 @@ evas_filter_object_render(Eo *eo_obj, Evas_Object_Protected_Data *obj,
         if (!pd->data->chain)
           {
              Evas_Filter_Program *pgm;
+
              pgm = evas_filter_program_new(pd->data->name, alpha);
              evas_filter_program_source_set_all(pgm, pd->data->sources);
              evas_filter_program_data_set_all(pgm, pd->data->data);
-             evas_filter_program_state_set(pgm, eo_obj, obj,
-                                           pd->data->state.cur.name, pd->data->state.cur.value,
-                                           pd->data->state.next.name, pd->data->state.next.value,
-                                           pd->data->state.pos);
+             _evas_filter_state_set_internal(pgm, pd);
              if (!evas_filter_program_parse(pgm, pd->data->code))
                {
                   ERR("Filter program parsing failed");
@@ -226,10 +239,7 @@ evas_filter_object_render(Eo *eo_obj, Evas_Object_Protected_Data *obj,
           {
              Eina_Bool redraw;
 
-             redraw = evas_filter_program_state_set(pd->data->chain, eo_obj, obj,
-                                                    pd->data->state.cur.name, pd->data->state.cur.value,
-                                                    pd->data->state.next.name, pd->data->state.next.value,
-                                                    pd->data->state.pos);
+             redraw = _evas_filter_state_set_internal(pd->data->chain, pd);
              if (redraw)
                DBG("Filter redraw by state change!");
              else if (obj->changed)
@@ -280,10 +290,9 @@ evas_filter_object_render(Eo *eo_obj, Evas_Object_Protected_Data *obj,
                }
           }
         else
-           evas_filter_program_state_set(pd->data->chain, eo_obj, obj,
-                                         pd->data->state.cur.name, pd->data->state.cur.value,
-                                         pd->data->state.next.name, pd->data->state.next.value,
-                                         pd->data->state.pos);
+          {
+             _evas_filter_state_set_internal(pd->data->chain, pd);
+          }
 
         filter = evas_filter_context_new(obj->layer->evas, do_async);
 
@@ -316,7 +325,7 @@ evas_filter_object_render(Eo *eo_obj, Evas_Object_Protected_Data *obj,
 
         // Request rendering from the object itself (child class)
         evas_filter_program_padding_get(pd->data->chain, &l, &r, &t, &b);
-        ok = evas_filter_input_render(eo_obj, filter, drawctx, l, r, t, b, do_async);
+        ok = evas_filter_input_render(eo_obj, filter, drawctx, NULL, l, r, t, b, do_async);
         if (!ok) ERR("Filter input render failed.");
 
         ENFN->context_free(ENDT, drawctx);
@@ -377,10 +386,7 @@ _efl_canvas_filter_internal_efl_gfx_filter_filter_program_set(Eo *eo_obj, Evas_F
            pgm = evas_filter_program_new(fcow->name, alpha);
            evas_filter_program_source_set_all(pgm, fcow->sources);
            evas_filter_program_data_set_all(pgm, fcow->data);
-           evas_filter_program_state_set(pgm, eo_obj, obj,
-                                         fcow->state.cur.name, fcow->state.cur.value,
-                                         fcow->state.next.name, fcow->state.next.value,
-                                         fcow->state.pos);
+           _evas_filter_state_set_internal(pgm, pd);
            if (!evas_filter_program_parse(pgm, code))
              {
                 ERR("Parsing failed!");
@@ -523,10 +529,7 @@ _efl_canvas_filter_internal_efl_gfx_filter_filter_state_set(Eo *eo_obj, Evas_Fil
 
         if (pd->data->chain)
           {
-             evas_filter_program_state_set(pd->data->chain, eo_obj, obj,
-                                           pd->data->state.cur.name, pd->data->state.cur.value,
-                                           pd->data->state.next.name, pd->data->state.next.value,
-                                           pd->data->state.pos);
+             _evas_filter_state_set_internal(pd->data->chain, pd);
           }
 
         evas_filter_dirty(eo_obj);
diff --git a/src/lib/evas/canvas/evas_object_image.c b/src/lib/evas/canvas/evas_object_image.c
index 427359e2f9..1a93fafb5b 100644
--- a/src/lib/evas/canvas/evas_object_image.c
+++ b/src/lib/evas/canvas/evas_object_image.c
@@ -1717,7 +1717,8 @@ _efl_canvas_image_internal_efl_canvas_filter_internal_filter_dirty(Eo *eo_obj, E
 }
 
 EOLIAN static Eina_Bool
-_efl_canvas_image_internal_efl_canvas_filter_internal_filter_input_alpha(Eo *eo_obj EINA_UNUSED, Evas_Image_Data *o EINA_UNUSED)
+_efl_canvas_image_internal_efl_canvas_filter_internal_filter_input_alpha(
+      Eo *eo_obj EINA_UNUSED, Evas_Image_Data *o EINA_UNUSED)
 {
    return EINA_FALSE;
 }
@@ -1730,11 +1731,27 @@ _efl_canvas_image_internal_efl_gfx_filter_filter_program_set(Eo *obj, Evas_Image
    efl_gfx_filter_program_set(efl_super(obj, MY_CLASS), code, name);
 }
 
+EOLIAN static void
+_efl_canvas_image_internal_efl_canvas_filter_internal_filter_state_prepare(
+      Eo *eo_obj, Evas_Image_Data *o EINA_UNUSED, Efl_Canvas_Filter_State *state, void *data EINA_UNUSED)
+{
+   Evas_Object_Protected_Data *obj = efl_data_scope_get(eo_obj, EFL_CANVAS_OBJECT_CLASS);
+
+   memset(&state->text, 0, sizeof(state->text));
+#define STATE_COLOR(dst, src) dst.r = src.r; dst.g = src.g; dst.b = src.b; dst.a = src.a
+   STATE_COLOR(state->color, obj->cur->color);
+#undef STATE_COLOR
+
+   state->w = obj->cur->geometry.w;
+   state->h = obj->cur->geometry.h;
+   state->scale = obj->cur->scale;
+}
+
 EOLIAN static Eina_Bool
-_efl_canvas_image_internal_efl_canvas_filter_internal_filter_input_render(Eo *eo_obj, Evas_Image_Data *o,
-                                                           void *_filter, void *context,
-                                                           int l, int r EINA_UNUSED, int t, int b EINA_UNUSED,
-                                                           Eina_Bool do_async)
+_efl_canvas_image_internal_efl_canvas_filter_internal_filter_input_render(
+      Eo *eo_obj, Evas_Image_Data *o, void *_filter, void *context,
+      void *data EINA_UNUSED, int l, int r EINA_UNUSED, int t, int b EINA_UNUSED,
+      Eina_Bool do_async)
 {
    Evas_Object_Protected_Data *obj = efl_data_scope_get(eo_obj, EFL_CANVAS_OBJECT_CLASS);
    Evas_Filter_Context *filter = _filter;
diff --git a/src/lib/evas/canvas/evas_object_text.c b/src/lib/evas/canvas/evas_object_text.c
index ce383dac52..7329e78d82 100644
--- a/src/lib/evas/canvas/evas_object_text.c
+++ b/src/lib/evas/canvas/evas_object_text.c
@@ -1698,11 +1698,31 @@ _evas_text_efl_canvas_filter_internal_filter_input_alpha(Eo *eo_obj EINA_UNUSED,
    return EINA_TRUE;
 }
 
+EOLIAN static void
+_evas_text_efl_canvas_filter_internal_filter_state_prepare(Eo *eo_obj, Evas_Text_Data *o,
+                                                           Efl_Canvas_Filter_State *state, void *data EINA_UNUSED)
+{
+   Evas_Object_Protected_Data *obj = efl_data_scope_get(eo_obj, EFL_CANVAS_OBJECT_CLASS);
+
+#define STATE_COLOR(dst, src) dst.r = src.r; dst.g = src.g; dst.b = src.b; dst.a = src.a
+   STATE_COLOR(state->color, obj->cur->color);
+   STATE_COLOR(state->text.glow, o->cur.glow);
+   STATE_COLOR(state->text.glow2, o->cur.glow2);
+   STATE_COLOR(state->text.shadow, o->cur.shadow);
+   STATE_COLOR(state->text.outline, o->cur.outline);
+#undef STATE_COLOR
+
+   state->w = obj->cur->geometry.w;
+   state->h = obj->cur->geometry.h;
+   state->scale = obj->cur->scale;
+}
+
 EOLIAN static Eina_Bool
 _evas_text_efl_canvas_filter_internal_filter_input_render(Eo *eo_obj EINA_UNUSED, Evas_Text_Data *o,
-                                           void *_filter, void *drawctx,
-                                           int l, int r EINA_UNUSED, int t, int b EINA_UNUSED,
-                                           Eina_Bool do_async)
+                                                          void *_filter, void *drawctx,
+                                                          void *data EINA_UNUSED,
+                                                          int l, int r EINA_UNUSED, int t, int b EINA_UNUSED,
+                                                          Eina_Bool do_async)
 {
    Evas_Filter_Context *filter = _filter;
    Evas_Object_Text_Item *it;
diff --git a/src/lib/evas/canvas/evas_text.eo b/src/lib/evas/canvas/evas_text.eo
index f2e2b46612..8cce0edd66 100644
--- a/src/lib/evas/canvas/evas_text.eo
+++ b/src/lib/evas/canvas/evas_text.eo
@@ -267,9 +267,10 @@ class Evas.Text (Efl.Canvas.Object, Efl.Text, Efl.Text.Properties, Efl.Canvas.Fi
       Efl.Text.Properties.font { get; set; }
       Efl.Text.Properties.font_source { get; set; }
       Efl.Gfx.Filter.filter_program { set; }
+      Efl.Canvas.Filter.Internal.filter_dirty;
       Efl.Canvas.Filter.Internal.filter_input_alpha;
       Efl.Canvas.Filter.Internal.filter_input_render;
-      Efl.Canvas.Filter.Internal.filter_dirty;
-      Efl.Canvas.Object.paragraph_direction { get; set; }
+      Efl.Canvas.Filter.Internal.filter_state_prepare;
+      Efl.Canvas.Object.paragraph_direction { set; get; }
    }
 }
diff --git a/src/lib/evas/filters/evas_filter.c b/src/lib/evas/filters/evas_filter.c
index 5440105a28..e4008d5600 100644
--- a/src/lib/evas/filters/evas_filter.c
+++ b/src/lib/evas/filters/evas_filter.c
@@ -1314,17 +1314,13 @@ _filter_target_render(Evas_Filter_Context *ctx)
                                      ctx->target.r, ctx->target.g,
                                      ctx->target.b, ctx->target.a);
      }
-   else
-     {
-        ENFN->context_multiplier_unset(ENDT, drawctx);
-     }
 
    if (ctx->target.mask)
-     ENFN->context_clip_image_set(ENDT, drawctx,
-                                  ctx->target.mask, ctx->target.mask_x, ctx->target.mask_y,
-                                  ctx->evas, EINA_FALSE);
-   else
-     ENFN->context_clip_image_unset(ENDT, drawctx);
+     {
+        ENFN->context_clip_image_set(ENDT, drawctx, ctx->target.mask,
+                                     ctx->target.mask_x, ctx->target.mask_y,
+                                     ctx->evas, EINA_FALSE);
+     }
 
    ENFN->image_draw(ENDT, drawctx, surface, image,
                     0, 0, src->w, src->h,
@@ -1359,6 +1355,7 @@ evas_filter_font_draw(Evas_Filter_Context *ctx, void *draw_context, int bufid,
         evas_common_font_glyphs_ref(text_props->glyphs);
         evas_unref_queue_glyph_put(ctx->evas, text_props->glyphs);
      }
+   //evas_common_save_image_to_file(surface, "/tmp/input.png", 0, 100, 0 ,0);
 
    return EINA_TRUE;
 }
diff --git a/src/lib/evas/filters/evas_filter_parser.c b/src/lib/evas/filters/evas_filter_parser.c
index 6ccb649b39..8fce7c57a9 100644
--- a/src/lib/evas/filters/evas_filter_parser.c
+++ b/src/lib/evas/filters/evas_filter_parser.c
@@ -316,30 +316,6 @@ struct _Evas_Filter_Instruction
    Eina_Bool valid : 1;
 };
 
-struct _Evas_Filter_Program_State
-{
-   struct {
-      struct { int a, r, g, b; } outline;
-      struct { int a, r, g, b; } shadow;
-      struct { int a, r, g, b; } glow;
-      struct { int a, r, g, b; } glow2;
-   } text;
-   struct {
-      int a, r, g, b;
-   } color;
-   struct {
-      const char *name;
-      double value;
-   } cur;
-   struct {
-      const char *name;
-      double value;
-   } next;
-   int w, h;
-   double scale;
-   double pos;
-};
-
 struct _Evas_Filter_Program
 {
    Eina_Stringshare *name; // Optional for now
@@ -350,7 +326,7 @@ struct _Evas_Filter_Program
       // Note: padding can't be in the state as it's calculated after running Lua
       int l, r, t, b;
    } pad;
-   Evas_Filter_Program_State state;
+   Efl_Canvas_Filter_State state;
    Eina_Inlist *data; // Evas_Filter_Data_Binding
    lua_State *L;
    int       lua_func;
@@ -2967,50 +2943,24 @@ evas_filter_program_new(const char *name, Eina_Bool input_alpha)
    if (!pgm) return NULL;
    pgm->name = eina_stringshare_add(name);
    pgm->input_alpha = input_alpha;
-   pgm->state.color.r = 255;
-   pgm->state.color.g = 255;
-   pgm->state.color.b = 255;
-   pgm->state.color.a = 255;
-   pgm->state.scale = 1.0;
+   pgm->state = (Efl_Canvas_Filter_State) EFL_CANVAS_FILTER_STATE_DEFAULT;
 
    return pgm;
 }
 
 EAPI Eina_Bool
-evas_filter_program_state_set(Evas_Filter_Program *pgm, Evas_Object *eo_obj,
-                              Evas_Object_Protected_Data *obj,
-                              const char *cur_state, double cur_val,
-                              const char *next_state, double next_val,
-                              double pos)
+evas_filter_program_state_set(Evas_Filter_Program *pgm,
+                              const Efl_Canvas_Filter_State *state)
 {
-   Evas_Filter_Program_State old_state;
-
    EINA_SAFETY_ON_NULL_RETURN_VAL(pgm, EINA_FALSE);
+   EINA_SAFETY_ON_NULL_RETURN_VAL(state, EINA_FALSE);
 
-   memcpy(&old_state, &pgm->state, sizeof(Evas_Filter_Program_State));
-
-   pgm->state.w = obj->cur->geometry.w;
-   pgm->state.h = obj->cur->geometry.h;
-   pgm->state.scale = obj->cur->scale;
-   pgm->state.pos = pos;
-   pgm->state.cur.name = cur_state;
-   pgm->state.cur.value = cur_val;
-   pgm->state.next.name = next_state;
-   pgm->state.next.value = next_val;
-
-   efl_gfx_color_get(eo_obj, &pgm->state.color.r, &pgm->state.color.g, &pgm->state.color.b, &pgm->state.color.a);
-
-   if (efl_isa(eo_obj, EVAS_TEXT_CLASS))
+   if (memcmp(&pgm->state, state, sizeof(Efl_Canvas_Filter_State)) != 0)
      {
-        evas_obj_text_shadow_color_get(eo_obj, &pgm->state.text.shadow.r, &pgm->state.text.shadow.g, &pgm->state.text.shadow.b, &pgm->state.text.shadow.a);
-        evas_obj_text_outline_color_get(eo_obj, &pgm->state.text.outline.r, &pgm->state.text.outline.g, &pgm->state.text.outline.b, &pgm->state.text.outline.a);
-        evas_obj_text_glow_color_get(eo_obj, &pgm->state.text.glow.r, &pgm->state.text.glow.g, &pgm->state.text.glow.b, &pgm->state.text.glow.a);
-        evas_obj_text_glow2_color_get(eo_obj, &pgm->state.text.glow2.r, &pgm->state.text.glow2.g, &pgm->state.text.glow2.b, &pgm->state.text.glow2.a);
+        pgm->changed = EINA_TRUE;
+        memcpy(&pgm->state, state, sizeof(Efl_Canvas_Filter_State));
      }
 
-   if (memcmp(&old_state, &pgm->state, sizeof(Evas_Filter_Program_State)) != 0)
-     pgm->changed = EINA_TRUE;
-
    if (pgm->changed)
      pgm->padding_calc = EINA_FALSE;
 
diff --git a/src/lib/evas/include/evas_filter.h b/src/lib/evas/include/evas_filter.h
index bb7a32d287..60d946fddc 100644
--- a/src/lib/evas/include/evas_filter.h
+++ b/src/lib/evas/include/evas_filter.h
@@ -4,6 +4,8 @@
 #include "evas_common_private.h"
 #include "evas_private.h"
 
+#include "efl_canvas_filter_internal.eo.h"
+
 #ifdef EAPI
 # undef EAPI
 #endif
@@ -35,7 +37,6 @@ typedef struct _Evas_Filter_Command Evas_Filter_Command;
 typedef struct _Evas_Filter_Instruction Evas_Filter_Instruction;
 typedef struct _Evas_Filter_Buffer Evas_Filter_Buffer;
 typedef struct _Evas_Filter_Proxy_Binding Evas_Filter_Proxy_Binding;
-typedef struct _Evas_Filter_Program_State  Evas_Filter_Program_State;
 typedef enum _Evas_Filter_Mode Evas_Filter_Mode;
 typedef enum _Evas_Filter_Blur_Type Evas_Filter_Blur_Type;
 typedef enum _Evas_Filter_Channel Evas_Filter_Channel;
@@ -124,9 +125,11 @@ enum _Evas_Filter_Transform_Flags
    EVAS_FILTER_TRANSFORM_VFLIP = 1
 };
 
+#define EFL_CANVAS_FILTER_STATE_DEFAULT { {}, { 255, 255, 255, 255 }, { "default", 0.0 }, {}, 0, 0, 1.0, 0.0 }
+
 /* Parser stuff (high level API) */
 EAPI Evas_Filter_Program *evas_filter_program_new(const char *name, Eina_Bool input_alpha);
-EAPI Eina_Bool           evas_filter_program_state_set(Evas_Filter_Program *pgm, Evas_Object *eo_obj, Evas_Object_Protected_Data *obj, const char *cur_state, double cur_val, const char *next_state, double next_val, double pos);
+EAPI Eina_Bool           evas_filter_program_state_set(Evas_Filter_Program *pgm, const Efl_Canvas_Filter_State *state);
 EAPI Eina_Bool           evas_filter_program_parse(Evas_Filter_Program *pgm, const char *str);
 EAPI void                evas_filter_program_del(Evas_Filter_Program *pgm);
 Eina_Bool                evas_filter_context_program_use(Evas_Filter_Context *ctx, Evas_Filter_Program *pgm);