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#ifndef GRAPH_H_INCLUDED
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#define GRAPH_H_INCLUDED
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/**
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 * @defgroup    graph   graph
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 * @brief Graph module.
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 *
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 * Provides functions, classes and methods for graphic drawing.
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 *
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 * @{
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 */
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// Graphics modes
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/// @brief Indexed graphic mode, 1024x768 px
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#define INDEXED_1024_768        0x105
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/// @brief Direct graphic mode, 640x480 px, RGB = 888 bits
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#define DIRECT_640_480_888      0x110
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/// @brief Direct graphic mode, 800x600 px, RGB = 888 bits
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#define DIRECT_800_600_888      0x115
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/// @brief Direct graphic mode, 1024x768 px, RGB = 888 bits
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#define DIRECT_1024_768_888     0x118
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/// @brief Direct graphic mode, 1280x1024 px, RGB = 565 bits
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#define DIRECT_1280_1024_565    0x11A
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/// @brief Direct graphic mode, 1280x1024 px, RGB = 888 bits
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#define DIRECT_1280_1024_888    0x11B
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// Colors in RBG (8 bit)
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/// @brief Black color
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#define GRAPH_BLACK             0x000000
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/// @brief White color
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#define GRAPH_WHITE             0xFFFFFF
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/// @brief Transparent
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#define GRAPH_TRANSPARENT       0x00
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/// @brief Red color
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#define GRAPH_RED               0xFF0000
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/// @brief Alpha threshold, from which it is either considered transparent or opaque
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#define ALPHA_THRESHOLD     0x7F
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/**
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 * @brief Initialize graphics.
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 * @param   mode    Graphics mode to use
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 * @return  SUCCESS if operation was successful, other value otherwise
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 */
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int (graph_init)(uint16_t mode);
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/**
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 * @brief Cleanup graphics.
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 * @return  SUCCESS if operation was successful, other value otherwise
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 */
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int (graph_cleanup)(void);
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/**
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 * @brief Get screen X-resolution.
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 * @return Screen X-resolution
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 */
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uint16_t   (graph_get_XRes)         (void);
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/**
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 * @brief Get screen Y-resolution.
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 * @return Screen Y-resolution
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 */
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uint16_t   (graph_get_YRes)         (void);
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/**
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 * @brief Get number of bytes per pixel.
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 *
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 * That is, the number of bytes needed to encode the color of a pixel.
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 * @return Number of bytes per pixel
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 */
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uint16_t   (graph_get_bytes_pixel)  (void);
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/**
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 * @brief Draw pixel with color.
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 * @param   x       X-position of pixel to draw
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 * @param   y       Y-position of pixel to draw
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 * @param   color   Color that will be used to draw the pixel
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 * @return  SUCCESS if operation was successful, other value otherwise
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 */
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void (graph_set_pixel)             (uint16_t x, uint16_t y, uint32_t color);
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/**
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 * @brief Draw pixel with color using position.
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 *
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 * Position is calculated from y*WIDTH+x.
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 * @param   pos     Position
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 * @param   color   Color that will be used to draw the pixel
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 */
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void (graph_set_pixel_pos)         (unsigned pos          , uint32_t color);
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/**
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 * @brief Clear screen, painting it black.
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 * @return  SUCCESS if operation was successful, other value otherwise
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 */
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int (graph_clear_screen)(void);
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/**
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 * @brief Draw everything on the buffer to the screen.
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 * @return  SUCCESS if operation was successful, other value otherwise
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 */
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int (graph_draw)(void);
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/**
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 * @}
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 */
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#endif /* end of include guard: GRAPH_H_INCLUDED */