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just about finished the maybe_clipped renderer
This commit is contained in:
Corey O'Connor
parent
26663ac1d6
commit
73415951e0
@ -208,6 +208,9 @@ is_out_of_bounds image s
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| s ^. remain_rows <= 0 = True
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| otherwise = False
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-- TODO: prove skip_columns, skip_rows == 0
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-- TODO: prove remaining_columns >= image_width
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-- TODO: prove remaining_rows >= image_height
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add_unclipped :: Image -> BlitM s ()
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add_unclipped EmptyImage = return ()
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add_unclipped (HorizText text_str _ow _cw) = do
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@ -227,59 +230,78 @@ add_unclipped (VertJoin part_top part_bottom _ow _oh) = do
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-- TODO: assumes background character is 1 column
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add_unclipped (BGFill ow oh) = do
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Background c a <- view bg
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y <- use row_offset
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let op = TextSpan ow ow (TL.replicate (fromIntegral ow) c)
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forM_ [y..y+oh] $ snoc_op op
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-- TODO: we know it's clipped actually, the equations that are exposed that introduce a
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-- Crop all assure the image exceeds the crop in the relevant direction.
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add_unclipped CropRight {cropped_image, output_width} = do
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remaining_columns .= output_width
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add_maybe_clipped cropped_image
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add_unclipped CropLeft {cropped_image, left_skip} = do
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skip_columns .= left_skip
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add_maybe_clipped cropped_image
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add_unclipped CropBottom {cropped_image, output_height} = do
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remaining_rows .= output_height
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add_maybe_clipped cropped_image
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add_unclipped CropTop {cropped_image, top_skip} = do
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skip_rows .= top_skip
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add_maybe_clipped cropped_image
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-- TODO: prove this cannot be called in fully clipped case
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-- TODO: prove this cannot be called in an out of bounds case.
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add_maybe_clipped :: Image -> BlitM s ()
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add_maybe_clipped EmptyImage = return ()
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add_maybe_clipped (HorizText text_str ow _cw) = do
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use row_offset >>= snoc_op (AttributeChange a)
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left_clip <- use skip_columns
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right_clip <- use remaining_columns
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let left_clipped = left_clip > 0
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right_clipped = (ow - left_clip) > right_clip
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if left_clipped || right_clipped
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then let text_str' = clip_text left_clip right_clip
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in add_unclipped_text text_str'
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else add_unclipped_text text_str
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add_maybe_clipped (VertJoin top_image bottom_image ow oh) = do
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add_maybe_clipped top_image
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row_offset += image_height top_image
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add_maybe_clipped bottom_image
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add_maybe_clipped (HorizJoin left_image right_image ow oh) -> do
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add_maybe_clipped left_image
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add_maybe_clipped right_image
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(skip_row',skip_col') <- row_ops_for_image mrow_ops l bg region skip_dim y remaining_columns remain_rows
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-- Don't output the right part unless there is at least a single column left after
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-- outputting the left part.
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if image_width l - (skip_col - skip_col') > remaining_columns
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then return (skip_row,skip_col')
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else do
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(skip_row'',skip_col'') <- row_ops_for_image mrow_ops r bg region (skip_row, skip_col') y (remaining_columns - image_width l + (skip_col - skip_col')) remain_rows
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return (min skip_row' skip_row'', skip_col'')
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add_maybe_clipped (BGFill width height) -> do
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let min_height = if y + height > (region_height region)
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then region_height region - y
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else min height remain_rows
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min_width = min width remaining_columns
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actual_height = if skip_row > min_height
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then 0
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else min_height - skip_row
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actual_width = if skip_col > min_width
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then 0
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else min_width - skip_col
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forM_ [y .. y + actual_height - 1] $! \y' -> snoc_bg_fill mrow_ops bg actual_width y'
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let skip_row' = if actual_height > skip_row
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then 0
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else skip_row - min_height
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skip_col' = if actual_width > skip_col
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then 0
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else skip_col - min_width
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return (skip_row',skip_col')
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ImageCrop (max_w,max_h) i ->
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row_ops_for_image mrow_ops i bg region skip_dim y (min remaining_columns max_w) (min remain_rows max_h)
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-- TODO: assumption that text spans are only 1 row high.
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s <- use skip_rows
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when (s < 1) $ do
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use row_offset >>= snoc_op (AttributeChange a)
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left_clip <- use skip_columns
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right_clip <- use remaining_columns
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let left_clipped = left_clip > 0
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right_clipped = (ow - left_clip) > right_clip
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if left_clipped || right_clipped
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then let text_str' = clip_text left_clip right_clip
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in add_unclipped_text text_str'
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else add_unclipped_text text_str
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add_maybe_clipped (VertJoin top_image bottom_image _ow oh) = do
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add_maybe_clipped_join "vert_join" skip_rows remaining_rows row_offset
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(image_height top_image)
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top_image
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bottom_image
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oh
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add_maybe_clipped (HorizJoin left_image right_image ow _oh) = do
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add_maybe_clipped_join "horiz_join" skip_columns remaining_columns devoid
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(image_width right_image)
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left_image
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right_image
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ow
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add_maybe_clipped BGFill {output_width, output_height} = do
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s <- get
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let output_width' = min (output_width - s.^skip_columns) s.^remaining_columns
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output_height' = min (output_height - s.^skip_rows ) s.^remaining_rows
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add_unclipped (BGFill output_width' output_height')
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add_maybe_clipped_join name skip remaining offset i0_dim i0 i1 size = do
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state <- get
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when (state^.remaining == 0) $ fail $ name ++ " with remaining == 0"
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case state^.skip of
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s | s >= size -> fail $ name ++ " on fully clipped"
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-- TODO: check if clipped in other dim. if not use add_unclipped
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| s == 0 -> case state^.remaining of
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r | r > i0_dim -> do
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add_maybe_clipped i0
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put $ state & offset +~ i0_dim & remaining -~ i0_dim
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add_maybe_clipped i1
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| otherwise -> add_maybe_clipped i0
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| s >= i0_dim -> do
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put $ state & skip -~ i0_dim
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add_maybe_clipped i1
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| otherwise -> case i0_dim - s of
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i0_dim' | state^.remaining <= i0_dim' -> add_maybe_clipped i0
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| otherwise -> do
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add_maybe_clipped i0
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put $ state & offset +~ i0_dim' & remaining -~ i0_dim'
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add_maybe_clipped i1
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-- TODO: store a skip list in HorizText
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-- TODO: represent display strings containing chars that are not 1 column chars as a separate
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