107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
#ifndef TETRIS_PIECE_H_
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#define TETRIS_PIECE_H_
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#include <inttypes.h>
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/*********
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* types *
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*********/
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typedef enum tetris_piece_shape_t
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{
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TETRIS_PC_LINE,
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TETRIS_PC_T,
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TETRIS_PC_SQUARE,
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TETRIS_PC_L,
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TETRIS_PC_LBACK,
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TETRIS_PC_S,
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TETRIS_PC_Z
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}
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tetris_piece_shape_t;
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typedef enum tetris_piece_angle_t
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{
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TETRIS_PC_ANGLE_0,
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TETRIS_PC_ANGLE_90,
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TETRIS_PC_ANGLE_180,
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TETRIS_PC_ANGLE_270
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}
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tetris_piece_angle_t;
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typedef enum tetris_piece_rotation_t
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{
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TETRIS_PC_ROT_CW, // clockwise rotation
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TETRIS_PC_ROT_CCW // counter clockwise rotation
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}
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tetris_piece_rotation_t;
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typedef struct tetris_piece_t
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{
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tetris_piece_shape_t shape; // specifies the shape of the piece
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tetris_piece_angle_t angle; // specifies one of 4 angels
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}
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tetris_piece_t;
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/*****************************
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* construction/destruction *
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*****************************/
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/* Function: tetris_piece_construct
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* Description: constructs a piece with the given attributes
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* Argument s: shape of the piece (see tetris_piece_shape_t)
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* Argument a: its angle (see tetris_piece_angel_t)
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* Return value: pointer to a newly created piece
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*/
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tetris_piece_t *tetris_piece_construct(tetris_piece_shape_t s,
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tetris_piece_angle_t a);
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/* Function: tetris_piece_destruct
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* Description: destructs a piece
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* Argument pPc: pointer to the piece to be destructed
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* Return value: void
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*/
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void tetris_piece_destruct(tetris_piece_t *pPc);
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/****************************
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* piece related functions *
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****************************/
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/* Function: tetris_piece_getBitmap
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* Description: returns bitfield representation of the piece
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* Argument pPc: piece from which the bitfield shuld be retrieved
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* Return value: bitfield representation of the piece
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* - nth nibble is nth row of the piece (from upper left)
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* - the LSB of a nibble represents the left side of a row
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*/
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uint16_t tetris_piece_getBitmap(tetris_piece_t *pPc);
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/* Function: tetris_piece_rotate
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* Description: rotates a piece
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* Argument pPc: piece to rotate
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* Argument r: type of rotation (see tetris_piece_rotation_t)
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* Return value: void
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*/
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void tetris_piece_rotate(tetris_piece_t *pPc,
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tetris_piece_rotation_t r);
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/* Function: tetris_piece_change
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* Description: changes the shape of a piece
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* Argument pPc: piece to change
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* Argument shape: the shape of interest
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* Return value: void
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*/
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void tetris_piece_change(tetris_piece_t *pPc,
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tetris_piece_shape_t shape);
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#endif /*TETRIS_PIECE_H_*/
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