Two new lcd/multi screen api convinience functions: draw_viewport(), fill_viewport().

They work as the drawrect/fillrect pendants but work on a viewport basis; pass NULL to draw the current viewport (the one set with set_viewport()).
In conjunction with action_get_touchscreen_press_in_vp() it should be less of a pain to draw buttons and get presses on them.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28239 a1c6a512-1295-4272-9138-f99709370657

apps/gui/buttonbar.c

@@ -66,16 +66,17 @@ static void gui_buttonbar_draw_button(struct gui_buttonbar * buttonbar, int num)
     struct viewport vp = bb_vp[display->screen_type];
 
     button_width = display->lcdwidth/BUTTONBAR_MAX_BUTTONS;
-    vp.width = button_width;
+    vp.width = button_width-1;
     vp.x = button_width * num;
     display->set_viewport(&vp);
-    display->fillrect(0, 0, button_width - 1, vp.height);
+    display->fill_viewport(NULL);
     if(buttonbar->caption[num][0] != 0)
     {
         display->getstringsize(buttonbar->caption[num], &fw, &fh);
         display->putsxy((button_width - fw)/2,
                         (vp.height-fh)/2, buttonbar->caption[num]);
     }
+    display->set_viewport(NULL);
 }
 
 void gui_buttonbar_set(struct gui_buttonbar * buttonbar,

apps/gui/splash.c

@@ -163,7 +163,7 @@ static void splash_internal(struct screen * screen, const char *fmt, va_list ap)
 #endif
         vp.drawmode = (DRMODE_SOLID|DRMODE_INVERSEVID);
 
-    screen->fillrect(0, 0, vp.width, vp.height);
+    screen->fill_viewport(NULL);
 
 #if LCD_DEPTH > 1
     if (screen->depth > 1)
@@ -174,7 +174,7 @@ static void splash_internal(struct screen * screen, const char *fmt, va_list ap)
 #endif
         vp.drawmode = DRMODE_SOLID;
 
-    screen->drawrect(0, 0, vp.width, vp.height);
+    screen->draw_viewport(NULL);
 
     /* prepare putting the text */
     y = RECT_SPACING;

apps/gui/statusbar.c

@@ -280,7 +280,7 @@ void gui_statusbar_draw(struct gui_statusbar * bar, bool force_redraw, struct vi
     {
         display->set_viewport(vp);
         display->set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
-        display->fillrect(0, 0, display->getwidth(), STATUSBAR_HEIGHT);
+        display->fill_viewport(NULL);
         display->set_drawmode(DRMODE_SOLID);
 
         if (bar->info.battery_state)

apps/plugins/lib/pluginlib_touchscreen.c

@@ -88,7 +88,8 @@ void touchbutton_draw(struct touchbutton *data, int num_buttons) {
     int i;
     /* These store the width and height of the title offset */
     int title_width, title_height;
-    
+    struct screen *lcd = rb->screens[SCREEN_MAIN];
+
     /* Loop over all the elements in data */
     for(i=0; i<num_buttons; i++) {
         /* Is this a visible button? */
@@ -96,10 +97,10 @@ void touchbutton_draw(struct touchbutton *data, int num_buttons) {
             /* Set the current viewport to the button so that all drawing
              *  operations are within the button location.
              */
-            rb->screens[SCREEN_MAIN]->set_viewport(&data[i].vp);
+            lcd->set_viewport(&data[i].vp);
             
             /* Get the string size so that the title can be centered. */
-            rb->lcd_getstringsize(data[i].title, &title_width, &title_height);
+            lcd->getstringsize(data[i].title, &title_width, &title_height);
             
             /* Center the title vertically */
             title_height=(data[i].vp.height-title_height)/2;
@@ -121,16 +122,17 @@ void touchbutton_draw(struct touchbutton *data, int num_buttons) {
              *  print the title.
              */
             if(title_width==0) {
-               rb->lcd_puts_scroll(0, 0, data[i].title);
+                lcd->puts_scroll_style_xyoffset(0, 0, data[i].title,
+                                                STYLE_DEFAULT, 0, title_height);
             } else {
-                rb->lcd_putsxy(title_width, title_height, data[i].title);
+                lcd->putsxy(title_width, title_height, data[i].title);
             }
             
             /* Draw bounding box around the button location. */
-            rb->lcd_drawrect( 0, 0, data[i].vp.width, data[i].vp.height);
+            lcd->draw_viewport(NULL);
         }
     }
-    rb->screens[SCREEN_MAIN]->set_viewport(NULL); /* Go back to the default viewport */
+    lcd->set_viewport(NULL); /* Go back to the default viewport */
 }
 
 /*******************************************************************************

apps/screen_access.c

@@ -162,6 +162,8 @@ struct screen screens[NB_SCREENS] =
         .update_viewport_rect=&lcd_update_viewport_rect,
         .fillrect=&lcd_fillrect,
         .drawrect=&lcd_drawrect,
+        .draw_viewport=&lcd_draw_viewport,
+        .fill_viewport=&lcd_fill_viewport,
         .drawpixel=&lcd_drawpixel,
         .drawline=&lcd_drawline,
         .vline=&lcd_vline,
@@ -253,6 +255,8 @@ struct screen screens[NB_SCREENS] =
         .update_viewport_rect=&lcd_remote_update_viewport_rect,
         .fillrect=&lcd_remote_fillrect,
         .drawrect=&lcd_remote_drawrect,
+        .draw_viewport=&lcd_remote_draw_viewport,
+        .fill_viewport=&lcd_remote_fill_viewport,
         .drawpixel=&lcd_remote_drawpixel,
         .drawline=&lcd_remote_drawline,
         .vline=&lcd_remote_vline,

apps/screen_access.h

@@ -117,6 +117,8 @@ struct screen
     void (*update_viewport_rect)(int x, int y, int width, int height);
     void (*fillrect)(int x, int y, int width, int height);
     void (*drawrect)(int x, int y, int width, int height);
+    void (*fill_viewport)(const struct viewport *vp);
+    void (*draw_viewport)(const struct viewport *vp);
     void (*drawpixel)(int x, int y);
     void (*drawline)(int x1, int y1, int x2, int y2);
     void (*vline)(int x, int y1, int y2);
@@ -139,8 +141,6 @@ struct screen
     void (*puts_scroll)(int x, int y, const unsigned char *string);
     void (*puts_scroll_offset)(int x, int y, const unsigned char *string,
                                  int x_offset);
-    void (*puts_scroll_xyoffset)(int x, int y, const unsigned char *string,
-                                 int x_offset, int y_offset);
     void (*scroll_speed)(int speed);
     void (*scroll_delay)(int ms);
     void (*stop_scroll)(void);

firmware/drivers/lcd-bitmap-common.c

@@ -81,6 +81,28 @@ static void lcd_gradient_rect(int x1, int x2, int y, unsigned h,
 }
 #endif
 
+/*
+ * draws the borders of the viewport, or of current_vp if vp == NULL
+ **/
+void LCDFN(draw_viewport)(const struct viewport *vp)
+{
+    if (vp == NULL)
+        LCDFN(drawrect)(0, 0, current_vp->width, current_vp->height);
+    else
+        LCDFN(drawrect)(vp->x, vp->y, vp->width, vp->height);
+}
+
+/*
+ * fills the rectangle formed by vp or by current_vp if vp == NULL
+ **/
+void LCDFN(fill_viewport)(const struct viewport *vp)
+{
+    if (vp == NULL)
+        LCDFN(fillrect)(0, 0, current_vp->width, current_vp->height);
+    else
+        LCDFN(fillrect)(vp->x, vp->y, vp->width, vp->height);
+}
+
 /* put a string at a given pixel position, skipping first ofs pixel columns */
 static void LCDFN(putsxyofs)(int x, int y, int ofs, const unsigned char *str)
 {

firmware/export/lcd-remote.h

@@ -178,6 +178,8 @@ extern void lcd_remote_hline(int x1, int x2, int y);
 extern void lcd_remote_vline(int x, int y1, int y2);
 extern void lcd_remote_drawrect(int x, int y, int width, int height);
 extern void lcd_remote_fillrect(int x, int y, int width, int height);
+extern void lcd_remote_draw_viewport(const struct viewport *vp);
+extern void lcd_remote_fill_viewport(const struct viewport *vp);
 extern void lcd_remote_bitmap_part(const fb_remote_data *src, int src_x,
                                    int src_y, int stride, int x, int y,
                                    int width, int height);

firmware/export/lcd.h

@@ -507,6 +507,8 @@ extern void lcd_hline(int x1, int x2, int y);
 extern void lcd_vline(int x, int y1, int y2);
 extern void lcd_drawrect(int x, int y, int width, int height);
 extern void lcd_fillrect(int x, int y, int width, int height);
+extern void lcd_draw_viewport(const struct viewport *vp);
+extern void lcd_fill_viewport(const struct viewport *vp);
 extern void lcd_bitmap_part(const fb_data *src, int src_x, int src_y,
                             int stride, int x, int y, int width, int height);
 extern void lcd_bitmap(const fb_data *src, int x, int y, int width,