faster image processing

main/ui_task.c

@@ -1616,6 +1616,11 @@ static void view_card(void)
 
     bool has_art = load_art_crop(s_uid);
 
+    lv_coord_t prev_scroll = 0;
+    if (s_card_scroll_cont != NULL) {
+        prev_scroll = lv_obj_get_scroll_y(s_card_scroll_cont);
+    }
+
     lvgl_port_lock(0);
     ui_clean_screen();
 
@@ -1698,6 +1703,25 @@ static void view_card(void)
         lv_obj_set_style_border_width(img, 1, 0);
         lv_obj_set_style_radius(img, 3, 0);
         cur_y += s_art_img_dsc.header.h + 4;
+    } else if (scryfall_is_fetching_image(s_uid)) {
+        /* Compact collapsible banner while art is downloading in background */
+        lv_obj_t *banner = lv_obj_create(s_card_scroll_cont);
+        lv_obj_set_size(banner, DISP_W - 32, 28);
+        lv_obj_align(banner, LV_ALIGN_TOP_MID, 0, cur_y);
+        lv_obj_set_style_bg_color(banner, lv_color_hex(0x222222), 0);
+        lv_obj_set_style_border_color(banner, lv_color_hex(COLOR_GOLD), 0);
+        lv_obj_set_style_border_width(banner, 1, 0);
+        lv_obj_set_style_radius(banner, 4, 0);
+        lv_obj_set_style_pad_all(banner, 2, 0);
+        lv_obj_clear_flag(banner, LV_OBJ_FLAG_SCROLLABLE);
+
+        lv_obj_t *blbl = lv_label_create(banner);
+        lv_label_set_text(blbl, "DOWNLOADING ART...");
+        lv_obj_set_style_text_font(blbl, &lv_font_montserrat_14, 0);
+        lv_obj_set_style_text_color(blbl, lv_color_hex(COLOR_AMBER), 0);
+        lv_obj_align(blbl, LV_ALIGN_CENTER, 0, 0);
+
+        cur_y += 32;
     }
 
     /* Type */
@@ -1722,6 +1746,10 @@ static void view_card(void)
         lv_obj_align(oracle_lbl, LV_ALIGN_TOP_LEFT, 0, cur_y);
     }
 
+    if (prev_scroll > 0) {
+        lv_obj_scroll_to_y(s_card_scroll_cont, prev_scroll, LV_ANIM_OFF);
+    }
+
     lvgl_port_unlock();
     cJSON_Delete(root);
 }
@@ -1920,6 +1948,18 @@ static void handle_fetch_ready(void)
     }
 }
 
+static void handle_image_ready(void)
+{
+    const char *img_uid = scryfall_last_image_uid();
+    scryfall_consume_image();
+
+    /* If the user is currently viewing this exact card, refresh view_card so art replaces the banner */
+    if (app_get_view() == APP_STATE_CARD_VIEW && img_uid != NULL && strcmp(img_uid, s_uid) == 0) {
+        ESP_LOGI(TAG, "Background art arrived for %s, updating card view", img_uid);
+        view_card();
+    }
+}
+
 /* ------------------------------------------------------------------ */
 /*  Encoder event dispatcher                                           */
 /* ------------------------------------------------------------------ */
@@ -2283,6 +2323,11 @@ static void ui_task(void *arg)
             handle_fetch_ready();
         }
 
+        /* 2b. Async Scryfall card image ready */
+        if (scryfall_has_pending_image()) {
+            handle_image_ready();
+        }
+
         /* 3. Button press & hold detection */
         int sw_level = gpio_get_level(HW_ENC_SW_GPIO);
         if (sw_level == 0) {