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diff --git a/PIPET-1/pipet_view.h b/PIPET-1/pipet_view.h
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+//
+//  pipet_view.h
+//  PIPET-1
+//
+//  Created by dianshi on 3/28/20.
+//  Copyright © 2020 dianshi. All rights reserved.
+//
+
+#ifndef pipet_view_h
+#define pipet_view_h
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#include <SDL2/SDL.h>
+
+typedef struct pipet_view {
+    int32_t width;
+    int32_t height;
+    int32_t delay;
+    int32_t color; //rgb
+    int64_t max_dot_value;
+    int64_t last_max_dot;
+    float   *dots_relative; //buf of dots values relative
+    uint64_t *dots;
+    int32_t cur_dot;
+    int32_t dots_size;
+} pipet_view;
+
+int pv_init(pipet_view *pv, int32_t max_dots, int32_t w, int32_t h);
+int pv_set_color(pipet_view *pv, int32_t color);
+int pv_add_dot(pipet_view *pv, uint64_t val);
+int pv_destroy(pipet_view *pv);
+
+
+int pv_draw_texture(pipet_view *pv, SDL_Renderer *renderer, int x, int y);
+int pv_render(pipet_view *pv, SDL_Renderer *renderer);
+
+
+
+#endif /* pipet_view_h */