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https://github.com/infinitefusion/infinitefusion-e18.git
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73 lines
3.3 KiB
Ruby
73 lines
3.3 KiB
Ruby
class TilemapRenderer
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module AutotileExpander
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MAX_TEXTURE_SIZE = (Bitmap.max_size / 1024) * 1024
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module_function
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# This doesn't allow for cache sizes smaller than 768, but if that applies
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# to you, you've got bigger problems.
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def expand(bitmap)
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return bitmap if bitmap.height == SOURCE_TILE_HEIGHT
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expanded_format = (bitmap.height == SOURCE_TILE_HEIGHT * 6)
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wrap = false
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if MAX_TEXTURE_SIZE < TILES_PER_AUTOTILE * SOURCE_TILE_HEIGHT
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wrap = true # Each autotile will occupy two columns instead of one
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end
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frames_count = [bitmap.width / (3 * SOURCE_TILE_WIDTH), 1].max
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new_bitmap = Bitmap.new(frames_count * (wrap ? 2 : 1) * SOURCE_TILE_WIDTH,
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TILES_PER_AUTOTILE * SOURCE_TILE_HEIGHT / (wrap ? 2 : 1))
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rect = Rect.new(0, 0, SOURCE_TILE_WIDTH / 2, SOURCE_TILE_HEIGHT / 2)
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TILES_PER_AUTOTILE.times do |id|
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pattern = TileDrawingHelper::AUTOTILE_PATTERNS[id >> 3][id % TILESET_TILES_PER_ROW]
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wrap_offset_x = (wrap && id >= TILES_PER_AUTOTILE / 2) ? SOURCE_TILE_WIDTH : 0
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wrap_offset_y = (wrap && id >= TILES_PER_AUTOTILE / 2) ? (TILES_PER_AUTOTILE / 2) * SOURCE_TILE_HEIGHT : 0
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frames_count.times do |frame|
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if expanded_format && [1, 2, 4, 8].include?(id)
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dest_x = frame * SOURCE_TILE_WIDTH * (wrap ? 2 : 1)
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dest_x += wrap_offset_x
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next if dest_x > MAX_TEXTURE_SIZE
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dest_y = id * SOURCE_TILE_HEIGHT
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dest_y -= wrap_offset_y
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next if dest_y > MAX_TEXTURE_SIZE
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case id
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when 1 # Top left corner
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new_bitmap.blt(dest_x, dest_y, bitmap,
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Rect.new(frame * SOURCE_TILE_WIDTH * 3, SOURCE_TILE_HEIGHT * 4,
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SOURCE_TILE_WIDTH, SOURCE_TILE_HEIGHT))
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when 2 # Top right corner
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new_bitmap.blt(dest_x, dest_y, bitmap,
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Rect.new(SOURCE_TILE_WIDTH + frame * SOURCE_TILE_WIDTH * 3, SOURCE_TILE_HEIGHT * 4,
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SOURCE_TILE_WIDTH, SOURCE_TILE_HEIGHT))
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when 4 # Bottom right corner
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new_bitmap.blt(dest_x, dest_y, bitmap,
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Rect.new(SOURCE_TILE_WIDTH + frame * SOURCE_TILE_WIDTH * 3, SOURCE_TILE_HEIGHT * 5,
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SOURCE_TILE_WIDTH, SOURCE_TILE_HEIGHT))
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when 8 # Bottom left corner
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new_bitmap.blt(dest_x, dest_y, bitmap,
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Rect.new(frame * SOURCE_TILE_WIDTH * 3, SOURCE_TILE_HEIGHT * 5,
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SOURCE_TILE_WIDTH, SOURCE_TILE_HEIGHT))
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end
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next
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end
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pattern.each_with_index do |src_chunk, i|
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real_src_chunk = src_chunk - 1
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dest_x = (i % 2) * SOURCE_TILE_WIDTH / 2
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dest_x += frame * SOURCE_TILE_WIDTH * (wrap ? 2 : 1)
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dest_x += wrap_offset_x
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next if dest_x > MAX_TEXTURE_SIZE
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dest_y = (i / 2) * SOURCE_TILE_HEIGHT / 2
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dest_y += id * SOURCE_TILE_HEIGHT
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dest_y -= wrap_offset_y
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next if dest_y > MAX_TEXTURE_SIZE
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rect.x = (real_src_chunk % 6) * SOURCE_TILE_WIDTH / 2
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rect.x += SOURCE_TILE_WIDTH * 3 * frame
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rect.y = (real_src_chunk / 6) * SOURCE_TILE_HEIGHT / 2
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new_bitmap.blt(dest_x, dest_y, bitmap, rect)
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end
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end
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end
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return new_bitmap
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end
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end
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end
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