diff options
Diffstat (limited to 'basys3/basys3.srcs/ppu_sprite_fg.vhd')
| -rw-r--r-- | basys3/basys3.srcs/ppu_sprite_fg.vhd | 93 |
1 files changed, 44 insertions, 49 deletions
diff --git a/basys3/basys3.srcs/ppu_sprite_fg.vhd b/basys3/basys3.srcs/ppu_sprite_fg.vhd index 340104a..c3cb59a 100644 --- a/basys3/basys3.srcs/ppu_sprite_fg.vhd +++ b/basys3/basys3.srcs/ppu_sprite_fg.vhd @@ -36,11 +36,11 @@ end ppu_sprite_fg; architecture Behavioral of ppu_sprite_fg is component ppu_sprite_transform port( - XI : in std_logic_vector(PPU_SPRITE_POS_H_WIDTH-1 downto 0); -- pixel position relative to tile - YI : in std_logic_vector(PPU_SPRITE_POS_V_WIDTH-1 downto 0); -- pixel position relative to tile + XI : in unsigned(PPU_SPRITE_POS_H_WIDTH-1 downto 0); -- pixel position relative to tile + YI : in unsigned(PPU_SPRITE_POS_V_WIDTH-1 downto 0); -- pixel position relative to tile FLIP_H, FLIP_V : in std_logic; -- flip sprite - XO : out std_logic_vector(PPU_SPRITE_POS_H_WIDTH-1 downto 0); -- new pixel position relative to tile - YO : out std_logic_vector(PPU_SPRITE_POS_V_WIDTH-1 downto 0)); -- new pixel position relative to tile + XO : out unsigned(PPU_SPRITE_POS_H_WIDTH-1 downto 0); -- new pixel position relative to tile + YO : out unsigned(PPU_SPRITE_POS_V_WIDTH-1 downto 0)); -- new pixel position relative to tile end component; component er_ram -- exposed register RAM generic( @@ -77,15 +77,13 @@ architecture Behavioral of ppu_sprite_fg is alias FAM_REG_COL_IDX is INT_FAM(12 downto 10); -- Palette index for tile alias FAM_REG_TILE_IDX is INT_FAM(9 downto 0); -- Tilemap index - -- signal PIXEL_ABS_X, PIXEL_ABS_Y : integer := 0; -- absolute pixel position (relative to FG canvas instead of viewport) - -- signal TILE_IDX_X, TILE_IDX_Y : integer := 0; -- background canvas tile grid xy - -- signal TILE_PIXEL_IDX_X, TILE_PIXEL_IDX_Y : integer := 0; -- xy position of pixel within tile (local tile coords) - -- signal TRANS_TILE_PIDX_X, TRANS_TILE_PIDX_Y : integer := 0; -- transformed xy position of pixel within tile - -- signal TRANS_TILE_PIXEL_IDX : integer := 0; -- index of pixel within tile (reading order) - -- signal TRANSFORM_XI, TRANSFORM_XO : std_logic_vector(PPU_SPRITE_POS_H_WIDTH-1 downto 0); -- transform inputs/outputs (x axis) - -- signal TRANSFORM_YI, TRANSFORM_YO : std_logic_vector(PPU_SPRITE_POS_V_WIDTH-1 downto 0); -- transform inputs/outputs (y axis) - -- signal TILEMAP_WORD_OFFSET : integer := 0; -- word offset from tile start address in TMM - -- signal PIXEL_BIT_OFFSET : integer := 0; -- pixel index within word of TMM + signal SPRITE_ACTIVE : std_logic := '0'; -- is pixel in bounding box of sprite + signal PIXEL_ABS_X, PIXEL_ABS_Y : integer := 0; -- absolute pixel position (relative to FG canvas instead of viewport) + signal TILE_PIDX_X, TRANS_TILE_PIDX_X : unsigned(PPU_SPRITE_POS_H_WIDTH-1 downto 0) := (others => '0'); -- xy position of pixel within tile (local tile coords) + signal TILE_PIDX_Y, TRANS_TILE_PIDX_Y : unsigned(PPU_SPRITE_POS_V_WIDTH-1 downto 0) := (others => '0'); -- xy position of pixel within tile (local tile coords) + signal TRANS_TILE_PIXEL_IDX : integer := 0; -- index of pixel within tile (reading order) + signal TILEMAP_WORD_OFFSET : integer := 0; -- word offset from tile start address in TMM + signal PIXEL_BIT_OFFSET : integer := 0; -- pixel index within word of TMM signal TMM_DATA_PAL_IDX : std_logic_vector(PPU_PALETTE_COLOR_WIDTH-1 downto 0); -- color of palette begin -- output drivers @@ -104,42 +102,39 @@ begin DATA => FAM_DATA, REG => INT_FAM); - -- -- -- FAM address calculations - -- -- PIXEL_ABS_X <= to_integer(unsigned(X)) + to_integer(unsigned(FG_SHIFT_X)); - -- -- PIXEL_ABS_Y <= to_integer(unsigned(Y)) + to_integer(unsigned(FG_SHIFT_Y)); - -- -- TILE_IDX_X <= PIXEL_ABS_X / 16; - -- -- TILE_IDX_Y <= PIXEL_ABS_Y / 16; - -- -- TILE_PIXEL_IDX_X <= PIXEL_ABS_X - TILE_IDX_X * 16; - -- -- TILE_PIXEL_IDX_Y <= PIXEL_ABS_Y - TILE_IDX_Y * 16; - -- -- T_FAM_ADDR <= std_logic_vector(to_unsigned((TILE_IDX_Y * integer(PPU_FG_CANVAS_TILES_H)) + TILE_IDX_X, PPU_FAM_ADDR_WIDTH)); - - -- -- -- FAM data dependant calculations - -- -- TRANSFORM_XI <= std_logic_vector(to_unsigned(TILE_PIXEL_IDX_X, PPU_SPRITE_POS_H_WIDTH)); - -- -- TRANSFORM_YI <= std_logic_vector(to_unsigned(TILE_PIXEL_IDX_Y, PPU_SPRITE_POS_V_WIDTH)); - -- -- transform: component ppu_sprite_transform port map( - -- -- XI => TRANSFORM_XI, - -- -- YI => TRANSFORM_YI, - -- -- FLIP_H => FAM_DATA_FLIP_H, - -- -- FLIP_V => FAM_DATA_FLIP_V, - -- -- XO => TRANSFORM_XO, - -- -- YO => TRANSFORM_YO); - -- -- TRANS_TILE_PIDX_X <= to_integer(unsigned(TRANSFORM_XO)); - -- -- TRANS_TILE_PIDX_Y <= to_integer(unsigned(TRANSFORM_YO)); - - -- -- TRANS_TILE_PIXEL_IDX <= integer(PPU_SPRITE_WIDTH) * TRANS_TILE_PIDX_Y + TRANS_TILE_PIDX_X; - -- -- TILEMAP_WORD_OFFSET <= TRANS_TILE_PIXEL_IDX / PPU_PIXELS_PER_TILE_WORD; - -- -- PIXEL_BIT_OFFSET <= TRANS_TILE_PIXEL_IDX mod PPU_PIXELS_PER_TILE_WORD; - - -- -- T_TMM_ADDR <= std_logic_vector(to_unsigned(PPU_SPRITE_PIXELS_PER_WORD * to_integer(unsigned(FAM_DATA_TILE_IDX)) + TILEMAP_WORD_OFFSET, PPU_TMM_ADDR_WIDTH)); - - -- -- -- TMM DATA - -- -- with PIXEL_BIT_OFFSET select - -- -- TMM_DATA_PAL_IDX <= R_TMM_DATA(2 downto 0) when 0, - -- -- R_TMM_DATA(5 downto 3) when 1, - -- -- R_TMM_DATA(8 downto 6) when 2, - -- -- R_TMM_DATA(11 downto 9) when 3, - -- -- R_TMM_DATA(14 downto 12) when 4, - -- -- (others => '0') when others; + SPRITE_ACTIVE <= ((unsigned(X) + 16) >= unsigned(FAM_REG_POS_H)) and + ((unsigned(X) + 16) < (unsigned(FAM_REG_POS_H) + to_unsigned(PPU_SPRITE_WIDTH, PPU_POS_H_WIDTH))) and + ((unsigned(Y) + 16) >= unsigned(FAM_REG_POS_V)) and + ((unsigned(Y) + 16) < (unsigned(FAM_REG_POS_V) + to_unsigned(PPU_SPRITE_HEIGHT, PPU_POS_V_WIDTH))); + + HIT <= SPRITE_ACTIVE and (nor TMM_DATA_PAL_IDX); -- if pixel in sprite hitbox and TMM_DATA_PAL_IDX > 0 + + TILE_PIDX_X <= to_unsigned(unsigned(X) + 16 - to_unsigned(FAM_REG_POS_H, TILE_PIDX_X'length), TILE_PIDX_X'length); -- (sprite local) pixel coords + TILE_PIDX_Y <= to_unsigned(unsigned(Y) + 16 - to_unsigned(FAM_REG_POS_V, TILE_PIDX_Y'length), TILE_PIDX_Y'length); -- (sprite local) pixel coords + + -- FAM data dependant calculations + transform: component ppu_sprite_transform port map( + XI => TILE_PIDX_X, + YI => TILE_PIDX_Y, + FLIP_H => FAM_REG_FLIP_H, + FLIP_V => FAM_REG_FLIP_V, + XO => TRANS_TILE_PIDX_X, + YO => TRANS_TILE_PIDX_Y); + + -- TMM address calculations (sprite word start, word offset, and pixel offset) + TRANS_TILE_PIXEL_IDX <= integer(PPU_SPRITE_WIDTH) * to_integer(TRANS_TILE_PIDX_Y) + to_integer(TRANS_TILE_PIDX_X); -- pixel index of sprite + TILEMAP_WORD_OFFSET <= TRANS_TILE_PIXEL_IDX / PPU_PIXELS_PER_TILE_WORD; -- word offset from starting word of sprite + PIXEL_BIT_OFFSET <= TRANS_TILE_PIXEL_IDX mod PPU_PIXELS_PER_TILE_WORD; -- pixel bit offset + T_TMM_ADDR <= std_logic_vector(to_unsigned(PPU_SPRITE_PIXELS_PER_WORD * to_integer(unsigned(FAM_REG_TILE_IDX)) + TILEMAP_WORD_OFFSET, PPU_TMM_ADDR_WIDTH)); -- TMM address + + -- TMM DATA + with PIXEL_BIT_OFFSET select + TMM_DATA_PAL_IDX <= R_TMM_DATA(2 downto 0) when 0, + R_TMM_DATA(5 downto 3) when 1, + R_TMM_DATA(8 downto 6) when 2, + R_TMM_DATA(11 downto 9) when 3, + R_TMM_DATA(14 downto 12) when 4, + (others => '0') when others; -- state machine (pipeline stage counter) + sync r/w process(CLK, RESET) |