skin_engine: New tag to draw a rectangle (optionally with a gradient)

%dr(x, y, width, height, [colour1[, colour2]]):
x,y - viewport relative pixel coordinates to start the rectangle.
width, height - obvious. can be '-' to fill the viewport
if both colours are left out the viewports foreground colour will be used
if one colour is specified it will fill the rectangle that colour.
if both colours are specified it will gradient fill the rectangle.

Change-Id: Iad451e99ded663bc7c5d182443659db7d909b388

apps/gui/skin_engine/skin_parser.c

@@ -638,6 +638,51 @@ static int parse_viewporttextstyle(struct skin_element *element,
     return 0;
 }
 
+static int parse_drawrectangle( struct skin_element *element,
+                                struct wps_token *token,
+                                struct wps_data *wps_data)
+{
+    (void)wps_data;
+    struct draw_rectangle *rect =
+            (struct draw_rectangle *)skin_buffer_alloc(sizeof(struct draw_rectangle));
+
+    if (!rect)
+        return -1;
+
+    rect->x = get_param(element, 0)->data.number;
+    rect->y = get_param(element, 1)->data.number;
+
+    if (isdefault(get_param(element, 2)))
+        rect->width = curr_vp->vp.width - rect->x;
+    else
+        rect->width = get_param(element, 2)->data.number;
+        
+    if (isdefault(get_param(element, 3)))
+        rect->height = curr_vp->vp.height - rect->y;
+    else
+        rect->height = get_param(element, 3)->data.number;
+
+    rect->start_colour = curr_vp->vp.fg_pattern;
+    rect->end_colour = curr_vp->vp.fg_pattern;
+
+    if (element->params_count > 4)
+    {
+        if (!parse_color(curr_screen, get_param_text(element, 4),
+                    &rect->start_colour))
+            return -1;
+        rect->end_colour = rect->start_colour;
+    }
+    if (element->params_count > 5)
+    {
+        if (!parse_color(curr_screen, get_param_text(element, 5),
+                    &rect->end_colour))
+            return -1;
+    }
+    token->value.data = PTRTOSKINOFFSET(skin_buffer, rect);
+
+    return 0;
+}
+        
 static int parse_viewportcolour(struct skin_element *element,
                                 struct wps_token *token,
                                 struct wps_data *wps_data)
@@ -2013,6 +2058,9 @@ static int skin_element_callback(struct skin_element* element, void* data)
                     sb_skin_has_title(curr_screen);
 #endif
                     break;
+                case SKIN_TOKEN_DRAWRECTANGLE:
+                    function = parse_drawrectangle;
+                    break;
 #endif
                 case SKIN_TOKEN_FILE_DIRECTORY:
                     token->value.i = get_param(element, 0)->data.number;

apps/gui/skin_engine/skin_render.c

@@ -176,8 +176,29 @@ static bool do_non_text_tags(struct gui_wps *gwps, struct skin_draw_info *info,
             if (do_refresh)
                 draw_peakmeters(gwps, info->line_number, vp);
             break;
+        case SKIN_TOKEN_DRAWRECTANGLE:
+            if (do_refresh)
+            {
+                struct draw_rectangle *rect =
+                        SKINOFFSETTOPTR(skin_buffer, token->value.data);
+#ifdef HAVE_LCD_COLOR
+                if (rect->start_colour != rect->end_colour &&
+                        gwps->display->screen_type == SCREEN_MAIN)
+                {
+                    gwps->display->gradient_fillrect(rect->x, rect->y, rect->width,
+                            rect->height, rect->start_colour, rect->end_colour);
+                }
+                else
 #endif
-#ifdef HAVE_LCD_BITMAP
+                {
+                    unsigned backup = vp->fg_pattern;
+                    vp->fg_pattern = rect->start_colour;
+                    gwps->display->fillrect(rect->x, rect->y, rect->width,
+                            rect->height);
+                    vp->fg_pattern = backup;
+                }
+            }
+            break;
         case SKIN_TOKEN_PEAKMETER_LEFTBAR:
         case SKIN_TOKEN_PEAKMETER_RIGHTBAR:
             data->peak_meter_enabled = true;

apps/gui/skin_engine/wps_internals.h

@@ -113,6 +113,15 @@ struct progressbar {
     bool horizontal;
     OFFSETTYPE(struct gui_img *) backdrop;
 };
+
+struct draw_rectangle {
+    int x;
+    int y;
+    int width;
+    int height;
+    unsigned start_colour;
+    unsigned end_colour;
+};
 #endif
 
 

apps/screen_access.c

@@ -264,6 +264,9 @@ struct screen screens[NB_SCREENS] =
 #endif
 #if defined(HAVE_LCD_BITMAP)
         .set_framebuffer = (void*)lcd_set_framebuffer,
+#if defined(HAVE_LCD_COLOR)    
+        .gradient_fillrect = lcd_gradient_fillrect,
+#endif
 #endif
     },
 #if NB_SCREENS == 2

apps/screen_access.h

@@ -162,6 +162,10 @@ struct screen
 #endif
 #if defined(HAVE_LCD_BITMAP)
     void (*set_framebuffer)(void *framebuffer);
+#if defined(HAVE_LCD_COLOR)    
+    void (*gradient_fillrect)(int x, int y, int width, int height,
+            unsigned start, unsigned end);
+#endif
 #endif
 };