ector: start implementing radial gradient in cairo backend.

src/lib/ector/cairo/ector_renderer_cairo_gradient_radial.c

@@ -9,29 +9,124 @@
 #include "ector_private.h"
 #include "ector_cairo_private.h"
 
+static cairo_pattern_t *(*cairo_pattern_create_radial)(double cx0, double cy0,
+                                                       double radius0,
+                                                       double cx1, double cy1,
+                                                       double radius1) = NULL;
+static void (*cairo_set_source)(cairo_t *cr, cairo_pattern_t *source) = NULL;
+static void (*cairo_fill)(cairo_t *cr) = NULL;
+static void (*cairo_rectangle)(cairo_t *cr,
+                               double x, double y,
+                               double width, double height) = NULL;
+static void (*cairo_pattern_add_color_stop_rgba)(cairo_pattern_t *pattern, double offset,
+                                                 double red, double green, double blue, double alpha) = NULL;
+static void (*cairo_pattern_destroy)(cairo_pattern_t *pattern) = NULL;
+
+
+// FIXME: as long as it is not possible to directly access the parent structure
+//  this will be duplicated from the linear gradient renderer
 typedef struct _Ector_Renderer_Cairo_Gradient_Radial_Data Ector_Renderer_Cairo_Gradient_Radial_Data;
 struct _Ector_Renderer_Cairo_Gradient_Radial_Data
 {
+   Ector_Cairo_Surface_Data *parent;
+   cairo_pattern_t *pat;
 };
 
 static Eina_Bool
 _ector_renderer_cairo_gradient_radial_ector_renderer_generic_base_prepare(Eo *obj, Ector_Renderer_Cairo_Gradient_Radial_Data *pd, Ector_Surface *s)
 {
+   Ector_Renderer_Generic_Gradient_Radial_Data *grd;
+   Ector_Renderer_Generic_Gradient_Data *gd;
+   unsigned int i;
+
+   if (pd->pat) return EINA_FALSE;
+
+   grd = eo_data_scope_get(obj, ECTOR_RENDERER_GENERIC_GRADIENT_RADIAL_CLASS);
+   gd = eo_data_scope_get(obj, ECTOR_RENDERER_GENERIC_GRADIENT_CLASS);
+   if (!grd || !gd) return EINA_FALSE;
+
+   USE(obj, cairo_pattern_create_radial, EINA_FALSE);
+   USE(obj, cairo_pattern_add_color_stop_rgba, EINA_FALSE);
+
+   pd->pat = cairo_pattern_create_radial(grd->focal.x, grd->focal.y, 0,
+                                         grd->radial.x, grd->radial.y, grd->radius);
+   for (i = 0; i < gd->colors_count; i++)
+     cairo_pattern_add_color_stop_rgba(pd->pat, gd->colors[i].offset,
+                                       gd->colors[i].r, gd->colors[i].g,
+                                       gd->colors[i].b, gd->colors[i].a);
+
+   if (!pd->parent)
+     {
+        Eo *parent;
+
+        eo_do(obj, parent = eo_parent_get());
+        if (!parent) return EINA_FALSE;
+        pd->parent = eo_data_xref(parent, ECTOR_CAIRO_SURFACE_CLASS, obj);
+     }
+
+   return EINA_FALSE;
 }
 
+// Clearly duplicated and should be in a common place...
 static Eina_Bool
 _ector_renderer_cairo_gradient_radial_ector_renderer_generic_base_draw(Eo *obj, Ector_Renderer_Cairo_Gradient_Radial_Data *pd, Ector_Surface *s, Ector_Rop op, Eina_Array *clips, int x, int y)
 {
+   Ector_Renderer_Generic_Gradient_Linear_Data *gld;
+
+   // FIXME: don't ignore clipping !
+   gld = eo_data_scope_get(obj, ECTOR_RENDERER_GENERIC_GRADIENT_LINEAR_CLASS);
+   if (!pd->pat || !gld || CHECK_CAIRO(pd->parent)) return EINA_FALSE;
+
+   USE(obj, cairo_rectangle, EINA_FALSE);
+
+   cairo_rectangle(pd->parent->cairo, gld->start.x - x, gld->start.y - y,
+                   gld->end.x - gld->start.x, gld->end.y - gld->start.y);
+   eo_do(obj, ector_renderer_cairo_base_fill());
+   cairo_fill(pd->parent->cairo);
+
+   return EINA_TRUE;
 }
 
-static Eina_Bool
-_ector_renderer_cairo_gradient_radial_ector_renderer_generic_base_done(Eo *obj, Ector_Renderer_Cairo_Gradient_Radial_Data *pd)
-{
-}
-
+// Clearly duplicated and should be in a common place...
 static Eina_Bool
 _ector_renderer_cairo_gradient_radial_ector_renderer_cairo_base_fill(Eo *obj, Ector_Renderer_Cairo_Gradient_Radial_Data *pd)
 {
+   if (!pd->pat || CHECK_CAIRO(pd->parent)) return EINA_FALSE;
+
+   USE(obj, cairo_set_source, EINA_FALSE);
+
+   cairo_set_source(pd->parent->cairo, pd->pat);
+
+   return EINA_TRUE;
+}
+
+void
+_ector_renderer_cairo_gradient_radial_eo_base_destructor(Eo *obj,
+                                                         Ector_Renderer_Cairo_Gradient_Radial_Data *pd)
+{
+   Eo *parent;
+
+   USE(obj, cairo_pattern_destroy, );
+
+   if (pd->pat) cairo_pattern_destroy(pd->pat);
+   pd->pat = NULL;
+
+   eo_do(obj, parent = eo_parent_get());
+   eo_data_xunref(parent, pd->parent, obj);
+
+   eo_do_super(obj, ECTOR_RENDERER_CAIRO_GRADIENT_RADIAL_CLASS, eo_destructor());
+}
+
+void
+_ector_renderer_cairo_gradient_radial_efl_graphics_gradient_stop_set(Eo *obj, Ector_Renderer_Cairo_Gradient_Radial_Data *pd, const Efl_Graphics_Gradient_Stop *colors, unsigned int length)
+{
+   USE(obj, cairo_pattern_destroy, );
+
+   if (pd->pat) cairo_pattern_destroy(pd->pat);
+   pd->pat = NULL;
+
+   eo_do_super(obj, ECTOR_RENDERER_CAIRO_GRADIENT_LINEAR_CLASS,
+               efl_graphics_gradient_stop_set(colors, length));
 }
 
 #include "ector_renderer_cairo_gradient_radial.eo.c"

src/lib/ector/cairo/ector_renderer_cairo_gradient_radial.eo

@@ -5,7 +5,8 @@ class Ector.Renderer.Cairo.Gradient_Radial (Ector.Renderer.Cairo.Base, Ector.Ren
    implements {
       Ector.Renderer.Generic.Base.prepare;
       Ector.Renderer.Generic.Base.draw;
-      Ector.Renderer.Generic.Base.done;
       Ector.Renderer.Cairo.Base.fill;
+      Eo.Base.destructor;
+      Efl.Graphics.Gradient.stop.set;
    }
 }