85 lines
4.1 KiB
Lua
85 lines
4.1 KiB
Lua
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--[[ Lua Blit Operations
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2017 William Wilgus
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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]]
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--[[
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copy(dst, src, [dx, dy, sx, sy, offset_x, offset_y, clip, _blit.OP, clr/customfunct])
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blit allows you to copy a [portion of a] source image to a dest image applying
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a transformation operation to the pixels as they are copied
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offsets are auto calculated if left empty or out of range
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blit will default to copy if operation is empty or out of range
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it is slightly faster to use the number directly and you don't really
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need to define all (any) of these if you don't use them but I put them
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here for easier use of the blit function
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]]
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if not rb.lcd_framebuffer then rb.splash(rb.HZ, "No Support!") return nil end
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local _blit ={} do
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_blit.CUSTOM = 0xFF --user defined blit function func(dst_val, x, y, src_val, x, y)
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_blit.BCOPY = 0x0 --copy (use :copy() instead it is slightly faster
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_blit.BOR = 0x1 --OR source and dest pixels
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_blit.BXOR = 0x2 --XOR source and dest pixels
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_blit.BNOR = 0x3 --(NOT) (source OR dest pixels)
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_blit.BSNOR = 0x4 --(NOT source) OR dest pixels
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_blit.BAND = 0x5 --AND source and dest pixels
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_blit.BNAND = 0x6 --(NOT) AND source and dest pixels
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_blit.BNOT = 0x7 --NOT source and dest pixels
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--blit functions for masks
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_blit.BSAND = 0x8 --copy color to dest if source pixel <> 0
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_blit.BSNOT = 0x9 --copy color to dest if source pixel == 0
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--blit functions for masks with colors
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_blit.BSORC = 0xA --copy source pixel or color
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_blit.BSXORC = 0xB --copy source pixel xor color
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_blit.BNSORC = 0xC --copy ~(src_val | clr)
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_blit.BSORNC = 0xD --copy src_val | (~clr)
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_blit.BSANDC = 0xE --copy src_val & clr;
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_blit.BNSANDC = 0xF --copy (~src_val) & clr
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_blit.BDORNSORC = 0x10 --copy dst | (~src_val) | clr
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_blit.BXORSADXORC = 0x11 --copy dst ^ (src_val & (dst_val ^ clr))
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_blit.BSNEC = 0x12 --copy source pixel if source <> color
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_blit.BSEQC = 0x13 --copy source pixel if source == color
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_blit.BSGTC = 0x14 --copy source pixel if source > color
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_blit.BSLTC = 0x15 --copy source pixel if source < color
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_blit.BDNEC = 0x16 --copy source pixel if dest <> color
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_blit.BDEQC = 0x17 --copy source pixel if dest == color
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_blit.BDGTC = 0x18 --copy source pixel if dest > color
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_blit.BDLTC = 0x19 --copy source pixel if dest < color
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_blit.BDNES = 0x1A --copy color to dest if dest <> source pixel
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_blit.BDEQS = 0x1B --copy color to dest if dest == source pixel
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_blit.BDGTS = 0x1C --copy color to dest if dest > source pixel
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_blit.BDLTS = 0x1D --copy color to dest if dest < source pixel
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--Source unused for these blits
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_blit.BCOPYC = 0x1E --copy color
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_blit.BORC = 0x1F --OR dest and color
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_blit.BXORC = 0x20 --XOR dest and color
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_blit.BNDORC = 0x21 --~(dst_val | clr)
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_blit.BDORNC = 0x22 --dst_val | (~clr)
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_blit.BANDC = 0x23 --AND dest and color
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_blit.BNDANDC = 0x24 --copy (~dst_val) & clr
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_blit.BDLTS = 0x25 --dest NOT color
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end -- _blit operations
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return _blit
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