uCanvas 2D Graphics API

Overview

The uCanvas Rendering Engine API provides a set of functions for initializing and controlling a rendering engine, creating tasks for animations and user interactions, managing scenes, and creating 2D shapes and objects. The API is designed to be simple and versatile for creating graphical applications.

Initializing and Starting

void start_uCanvas_engine(void);

This function initiates the rendering engine and initializes the display.

Task Management

uCanvas_Animation_task_handle_t uCanvas_Add_Task(uCanvas_Animation_task_t animation_loop);

Creates an independent custom thread for the passed loop function and returns a handle.

void uCanvas_Pause_Task(uCanvas_Animation_task_handle_t task_handle);

Pauses a custom user task identified by the task handle.

void uCanvas_Delay(uint16_t delay);

Adds a delay in milliseconds.

void uCanvas_Remove_Task(uCanvas_Animation_task_handle_t handle);

Deletes a custom user task identified by the task handle.

Scene Management

uCanvas_Scene_t* New_uCanvas_Scene(void);

Creates a new 2D scene instance.

void uCanvas_set_active_scene(uCanvas_Scene_t* scene);

Sets the passed 2D instance as the active scene to render.

Object Creation

uCanvas_universal_obj_t* New_uCanvas_2DRectangle(uint16_t xpos, uint16_t ypos, uint16_t h, uint16_t w);

uCanvas_universal_obj_t* New_uCanvas_2DTextbox(char* text, uint16_t xpos, uint16_t ypos);

uCanvas_universal_obj_t* New_uCanvas_2DCircle(uint16_t xpos, uint16_t ypos, uint16_t radius);

uCanvas_universal_obj_t* New_uCanvas_2DLine(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2);

Creates various 2D objects such as rectangles, textboxes, circles, and lines.

Properties Control

void uCanvas_Animate_Text_Reveal(uCanvas_universal_obj_t* obj, char* text, uint16_t delay);

Animates a textbox with a reveal-style animation.

void uCanvas_Set_Text(uCanvas_universal_obj_t* obj, char* text);

Sets the content of the passed textbox object.

void uCanvas_Set_Obj_Type(uCanvas_universal_obj_t* obj, uCanvas_element_type_t type);

Sets the type of the passed 2D object.

void uCanvas_Set_Color(uCanvas_universal_obj_t* obj, uint16_t r, uint16_t g, uint16_t b);

Sets the color of the passed 2D object.

void uCanvas_Set_Monochrome_Color(uCanvas_universal_obj_t* obj, uint16_t color);

Sets monochrome pixel values of the passed 2D object.

void uCanvas_Set_Position(uCanvas_universal_obj_t* obj, uint16_t xpos, uint16_t ypos);

Sets the absolute position of the passed 2D object.

void uCanvas_Set_Line_Coordinates(uCanvas_universal_obj_t* line, uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2);

Sets coordinates for a 2D line object.

void uCanvas_Set_Radius(uCanvas_universal_obj_t* obj, uint16_t radius);

Sets the radius value of an elliptical type of 2D object.

void uCanvas_Set_Width_Height(uCanvas_universal_obj_t* obj, uint16_t width, uint16_t height);

Sets the height and width of a rectangular 2D object.

void uCanvas_Set_Fill(uCanvas_universal_obj_t* obj, fill_t fill);

Allows indicating fill/no-fill insides of a 2D object.

void uCanvas_Set_Visibility(uCanvas_universal_obj_t* obj, visibility_ctrl_t vctrl);

Allows controlling the visibility of the passed 2D object.