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99 lines
2.8 KiB
Lua
99 lines
2.8 KiB
Lua
-- ase -- allegro-sprite-editor: the ultimate sprites factory
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-- Copyright (C) 2001-2005 by David A. Capello
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function GUI_MergeDown()
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local sprite, frpos, index
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local src_layer, dst_layer
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local src_frame, dst_frame
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local src_image, dst_image
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local old_id
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sprite = current_sprite
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if not sprite then return end
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src_layer = sprite.layer
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if not src_layer or not layer_is_image(src_layer) then return end
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dst_layer = sprite.layer.prev
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if not dst_layer or not layer_is_image(dst_layer) then return end
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if undo_is_enabled(sprite.undo) then
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undo_open(sprite.undo)
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end
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for frpos = 0, sprite.frames-1 do
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-- get frames
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src_frame = layer_get_frame(src_layer, frpos)
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dst_frame = layer_get_frame(dst_layer, frpos)
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-- get images
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if src_frame then
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src_image = stock_get_image(src_layer.stock, src_frame.image)
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else
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src_image = nil
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end
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if dst_frame then
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dst_image = stock_get_image(dst_layer.stock, dst_frame.image)
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else
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dst_image = nil
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end
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-- with source image?
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if src_image then
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-- no destination image
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if not dst_image then
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-- copy this frame to the destination layer
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dst_image = image_new_copy(src_image)
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index = stock_add_image(dst_layer.stock, dst_image)
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if undo_is_enabled(sprite.undo) then
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undo_add_image(sprite.undo, dst_layer.stock, dst_image)
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end
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dst_frame = frame_new(frpos, index)
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frame_set_position(dst_frame, src_frame.x, src_frame.y)
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frame_set_opacity(dst_frame, src_frame.opacity)
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if undo_is_enabled(sprite.undo) then
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undo_add_frame(sprite.undo, dst_layer, dst_frame)
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end
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layer_add_frame(dst_layer, dst_frame)
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-- with destination
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else
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local x1 = MIN(src_frame.x, dst_frame.x)
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local y1 = MIN(src_frame.y, dst_frame.y)
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local x2 = MAX(src_frame.x+src_image.w-1, dst_frame.x+dst_image.w-1)
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local y2 = MAX(src_frame.y+src_image.h-1, dst_frame.y+dst_image.h-1)
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local new_image = image_crop(dst_image,
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x1-dst_frame.x,
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y1-dst_frame.y,
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x2-x1+1, y2-y1+1)
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-- merge src_image in new_image
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image_merge(new_image, src_image,
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src_frame.x-x1,
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src_frame.y-y1,
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src_frame.opacity, src_layer.blend_mode)
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frame_set_position(dst_frame, x1, y1)
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if undo_is_enabled(sprite.undo) then
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undo_replace_image(sprite.undo, dst_layer.stock, dst_frame.image)
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end
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stock_replace_image(dst_layer.stock, dst_frame.image, new_image)
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image_free(dst_image)
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end
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end
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end
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if undo_is_enabled(sprite.undo) then
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undo_set_layer(sprite.undo, sprite)
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undo_remove_layer(sprite.undo, src_layer)
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undo_close(sprite.undo)
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end
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sprite_set_layer(sprite, dst_layer)
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layer_remove_layer(src_layer.parent, src_layer)
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layer_free(src_layer)
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GUI_Refresh(sprite)
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end
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