mirror of https://github.com/ZDoom/raze-gles.git
509 lines
15 KiB
Lua
509 lines
15 KiB
Lua
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local ffi = require("ffi")
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local C = ffi.C
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local bcarray = require("bcarray")
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local assert = assert
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local error = error
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local ipairs = ipairs
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local type = type
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local decl = assert(decl) -- comes from above (defs.ilua or defs_m32.lua)
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local ismapster32 = (C.LUNATIC_CLIENT == C.LUNATIC_CLIENT_MAPSTER32)
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----------
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decl[[
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const int32_t qsetmode;
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int32_t getclosestcol_lim(int32_t r, int32_t g, int32_t b, int32_t lastokcol);
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char *palookup[256]; // MAXPALOOKUPS
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uint8_t palette[768];
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uint8_t *basepaltable[];
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const char *getblendtab(int32_t blend);
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void setblendtab(int32_t blend, const char *tab);
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int32_t setpalookup(int32_t palnum, const uint8_t *shtab);
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]]
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if (ismapster32) then
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ffi.cdef[[
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int32_t _getnumber16(const char *namestart, int32_t num, int32_t maxnumber, char sign, const char *(func)(int32_t));
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const char *getstring_simple(const char *querystr, const char *defaultstr, int32_t maxlen, int32_t completion);
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typedef const char *(*luamenufunc_t)(void);
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void LM_Register(const char *name, luamenufunc_t funcptr, const char *description);
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void LM_Clear(void);
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]]
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end
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----------
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-- The API table
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local engine = {}
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local shtab_t -- forward-decl
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local function cast_u8ptr(sth)
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return ffi.cast("uint8_t *", sth)
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end
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local shtab_methods = {
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-- Remap consecutive blocks of 16 color indices and return this new shade
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-- table.
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--
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-- <idxs16>: table with idxs16[0] .. idxs16[15] >= 0 and <= 15
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-- (i.e. 0-based indices of such 16-tuples)
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--
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-- For example, the table
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-- { [0]=0,1, 2,3, 5,4, 6,7, 8,13, 10,11, 12,9, 14,15 }
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-- TODO (...)
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remap16 = function(sht, idxs16)
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if (type(idxs16) ~= "table") then
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error("invalid argument #2: must be a table", 2)
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end
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for i=0,15 do
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local idx = idxs16[i]
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if (not (idx==nil or type(idx)=="number" and idx >= 0 and idx <= 15)) then
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error("invalid reordering table: elements must be numbers in [0 .. 15], or nil", 2)
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end
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end
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local newsht = shtab_t()
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for sh=0,31 do
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for i=0,15 do
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ffi.copy(cast_u8ptr(newsht[sh]) + 16*i,
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cast_u8ptr(sht[sh]) + 16*(idxs16[i] or i), 16)
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end
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end
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return newsht
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end,
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}
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local function shtab_mt__index(sht, idx)
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local method = shtab_methods[idx]
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if (method) then
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return method
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end
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end
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local pal256_t = bcarray.new("uint8_t", 256, "color index 256-tuple")
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-- The shade table type, effectively a bound-checked uint8_t [32][256]:
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shtab_t = bcarray.new(pal256_t, 32, "shade table", nil, nil, { __index = shtab_mt__index })
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local SIZEOF_SHTAB = ffi.sizeof(shtab_t)
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local blendtab_t = bcarray.new(pal256_t, 256, "blending table")
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local SIZEOF_BLENDTAB = ffi.sizeof(blendtab_t)
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local RESERVEDPALS = 8 -- KEEPINSYNC build.h: assure that ours is >= theirs
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engine.RESERVEDPALS = RESERVEDPALS
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local MAXBLENDTABS = 256 -- KEEPINSYNC build.h
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local function check_palidx(i)
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if (type(i) ~= "number" or not (i >= 0 and i <= 255-RESERVEDPALS)) then
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error("invalid argument #1: palette swap index must be in the range [0 .. "..255-RESERVEDPALS.."]", 3)
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end
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end
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local function check_blendidx(i)
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if (type(i) ~= "number" or not (i >= 0 and i <= MAXBLENDTABS-1)) then
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error("invalid argument #1: blending table index must be in the range [0 .. ".. MAXBLENDTABS-1 .."]", 3)
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end
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end
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local function err_uncommon_shade_table(ret)
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if (ret == -1) then
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error("loaded engine shade tables don't have 32 gradients of shade", 3)
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end
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end
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local function palookup_isdefault(palnum) -- KEEPINSYNC engine.c
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return (C.palookup[palnum] == nil or (palnum ~= 0 and C.palookup[palnum] == C.palookup[0]))
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end
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function engine.shadetab()
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return shtab_t()
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end
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function engine.blendtab()
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return blendtab_t()
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end
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function engine.getshadetab(palidx)
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check_palidx(palidx)
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if (palookup_isdefault(palidx)) then
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return nil
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end
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local ret = C.setpalookup(palidx, nil)
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err_uncommon_shade_table(ret)
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local sht = shtab_t()
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ffi.copy(sht, C.palookup[palidx], SIZEOF_SHTAB)
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return sht
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end
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function engine.getblendtab(blendidx)
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check_blendidx(blendidx)
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local ptr = C.getblendtab(blendidx)
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if (ptr == nil) then
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return nil
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end
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local tab = blendtab_t()
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ffi.copy(tab, ptr, SIZEOF_BLENDTAB)
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return tab
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end
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local function check_first_time()
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if (not ismapster32 and C.g_elFirstTime == 0) then
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error("may be called only while LUNATIC_FIRST_TIME is true", 3)
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end
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end
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function engine.setshadetab(palidx, shtab)
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check_first_time()
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check_palidx(palidx)
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if (not ffi.istype(shtab_t, shtab)) then
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error("invalid argument #2: must be a shade table obtained by shadetab()", 2)
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end
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if (not ismapster32 and not palookup_isdefault(palidx)) then
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error("attempt to override already defined shade table", 2)
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end
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local ret = C.setpalookup(palidx, cast_u8ptr(shtab))
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err_uncommon_shade_table(ret)
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end
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function engine.setblendtab(blendidx, tab)
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check_first_time()
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check_blendidx(blendidx)
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if (not ffi.istype(blendtab_t, tab)) then
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error("invalid argument #2: must be a blending table obtained by blendtab()", 2)
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end
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if (not ismapster32 and C.getblendtab(blendidx) ~= nil) then
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error("attempt to override already defined blending table", 2)
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end
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C.setblendtab(blendidx, cast_u8ptr(tab))
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end
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local function check_colcomp(a)
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if (type(a) ~= "number" or not (a >= 0 and a <= 63)) then
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error("color component must be in the range [0 .. 63]", 3)
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end
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end
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-- TODO: other base palettes?
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function engine.getrgb(colidx)
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if (type(colidx) ~= "number" or not (colidx >= 0 and colidx <= 255)) then
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error("color index must be in the range [0 .. 255]", 2)
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end
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-- NOTE: In the game, palette[255*{0..2}] is set to 0 in
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-- G_LoadExtraPalettes() via G_Startup(). However, that's after Lua state
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-- initialization (i.e. when LUNATIC_FIRST_TIME would be true), and in the
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-- editor, it's never changed from the purple color. Therefore, I think
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-- it's more useful to always return the fully black color here.
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if (colidx == 255) then
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return 0, 0, 0
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end
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local rgbptr = C.palette + 3*colidx
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return rgbptr[0], rgbptr[1], rgbptr[2]
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end
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function engine.nearcolor(r, g, b, lastokcol)
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check_colcomp(r)
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check_colcomp(g)
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check_colcomp(b)
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if (lastokcol == nil) then
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lastokcol = 255
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elseif (type(lastokcol)~="number" or not (lastokcol >= 0 and lastokcol <= 255)) then
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error("invalid argument #4 <lastokcol>: must be in the range [0 .. 255]", 2)
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end
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return C.getclosestcol_lim(r, g, b, lastokcol)
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end
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---------- Mapster32-only functions ----------
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if (ismapster32) then
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local io = require("io")
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local math = require("math")
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local string = require("string")
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ffi.cdef[[size_t fwrite(const void * restrict ptr, size_t size, size_t nmemb, void * restrict stream);]]
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local function validate_more_blendtabs(moreblends, kindname, gettabfunc)
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if (moreblends == nil) then
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return nil, nil
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end
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-- Additional blending tables: validate <moreblends> table.
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if (type(moreblends) ~= "table") then
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error("invalid argument #4: must be a table", 3)
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end
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local haveblend = { [0]=true }
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local blendnumtab, blendptrtab = {}, {}
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for i=1,#moreblends do
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local tmp = moreblends[i]
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local blendspec = (type(tmp) == "number") and { tmp, tmp } or tmp
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if (not (type(blendspec) == "table" and #blendspec == 2)) then
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error("invalid argument #4: must contain numbers or 2-tables", 3)
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end
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local blend1, blend2 = math.floor(blendspec[1]), math.floor(blendspec[2])
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if (not (type(blend1)=="number" and blend1 >= 1 and blend1 <= 255 and
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type(blend2)=="number" and blend2 >= 1 and blend2 <= 255)) then
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error("invalid argument #4: "..kindname.." table numbers must be in [1 .. 255]", 3)
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end
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for bi=blend1,blend2 do
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if (haveblend[bi]) then
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error("invalid argument #4: duplicate "..kindname.." table number "..bi, 3)
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end
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haveblend[bi] = true
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local ptr = gettabfunc(bi)
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if (ptr == nil) then
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error("invalid argument #4: "..kindname.." table for number "..bi.." is void", 3)
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end
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blendnumtab[#blendnumtab+1] = bi
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blendptrtab[#blendptrtab+1] = ptr
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end
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end
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assert(#blendnumtab <= 255)
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return blendnumtab, blendptrtab
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end
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-- ok, errmsg, nummoreblends = engine.savePaletteDat(
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-- filename [, palnum [, blendnum [, moreblends [, lognumalphatabs]]]])
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function engine.savePaletteDat(filename, palnum, blendnum, moreblends, lognumalphatabs)
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local sht = engine.getshadetab(palnum or 0)
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local tab = engine.getblendtab(blendnum or 0)
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if (sht == nil) then
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return nil, "no shade table with number "..palnum
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elseif (tab == nil) then
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return nil, "no blending table with number "..blendnum
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end
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local blendnumtab, blendptrtab = validate_more_blendtabs(
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moreblends, "blending", C.getblendtab)
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if (lognumalphatabs ~= nil) then
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if (not (type(lognumalphatabs)=="number" and lognumalphatabs >= 1 and lognumalphatabs <= 7)) then
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error("invalid argument #5: must be a number in [1 .. 7]", 2)
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end
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end
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local f, errmsg = io.open(filename, "wb+")
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if (f == nil) then
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return nil, errmsg
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end
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local n1 = C.fwrite(C.palette, 3, 256, f)
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f:write("\032\000") -- int16_t numshades
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local n3 = C.fwrite(sht, 256, 32, f)
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local n4 = C.fwrite(tab, 256, 256, f)
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if (n1 ~= 256 or n3 ~= 32 or n4 ~= 256) then
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return nil, "failed writing classic PALETTE.DAT data"
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end
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if (blendnumtab ~= nil) then
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f:write("MoreBlendTab")
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f:write(string.char(#blendnumtab))
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for i=1,#blendnumtab do
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f:write(string.char(blendnumtab[i]))
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if (C.fwrite(blendptrtab[i], 256, 256, f) ~= 256) then
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return nil, "failed writing additional blending table"
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end
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end
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if (lognumalphatabs ~= nil) then
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-- XXX: no checking whether these blending tables 1 to
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-- 1<<lognumalphatabs have been written.
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f:write(string.char(lognumalphatabs))
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end
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end
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f:close()
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return true, nil, (blendnumtab ~= nil) and #blendnumtab or 0
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end
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-- ok, errmsg, numlookups = engine.saveLookupDat(filename, lookups)
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function engine.saveLookupDat(filename, lookups)
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if (lookups == nil) then
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-- set to an invalid value, validate_more_blendtabs will error
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lookups = 0
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end
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local lookupnumtab, lookupptrtab = validate_more_blendtabs(
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lookups, "lookup", engine.getshadetab)
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local f, errmsg = io.open(filename, "wb+")
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if (f == nil) then
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return nil, errmsg
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end
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f:write(string.char(#lookupnumtab))
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for i=1,#lookupnumtab do
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f:write(string.char(lookupnumtab[i]))
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if (C.fwrite(lookupptrtab[i], 1, 256, f) ~= 256) then
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return nil, "failed writing lookup table"
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end
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end
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-- Write five base palettes
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for i=1,5 do
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local bpi = (i==3 or i==4) and 4+3-i or i
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if (C.fwrite(C.basepaltable[bpi], 1, 768, f) ~= 768) then
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return nil, "failed writing base palette"
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end
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end
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f:close()
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return true, nil, #lookupnumtab
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end
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local hexmap = {
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[0] = 0, -14, -- 0, 1: gray ramp
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14, 0, -- 2, 3: skin color ramp
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0, 14, -- 4, 5: blue ramp (second part first)
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14, 0, -- 6, 7: nightvision yellow/green
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14, -- 8: red first part...
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8, -- 9: yellow (slightly more red than green)
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14, 0, -- 10, 11: almost gray ramp, but with a slight red hue
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8, -- 12: "dirty" orange
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0, -- 13: ...red second part
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8, -- 14: blue-purple-red
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}
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-- Setup base palette 1 (water) to contain one color for each consecutive
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-- 16-tuple (which I'm calling a 'hex' for brevity), except for the last
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-- one with the fullbrights.
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function engine.setupDebugBasePal()
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for i=0,14 do
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local ptr = C.basepaltable[1] + 3*(16*i)
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local src = C.basepaltable[0] + 3*(16*i) + 3*hexmap[i]
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local r, g, b = src[0], src[1], src[2]
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for j=0,15 do
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local dst = ptr + 3*j
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dst[0], dst[1], dst[2] = r, g, b
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end
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end
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end
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function engine.linearizeBasePal()
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for _, begi in ipairs{0, 32, 96, 160} do
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local ptr = C.basepaltable[0] + 3*begi
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local refcol = ptr + 3*31
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for i=0,30 do
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for c=0,2 do
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ptr[3*i + c] = i*refcol[c]/31
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end
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end
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end
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for _, begi in ipairs{128, 144, 192, 208, 224} do
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local ptr = C.basepaltable[0] + 3*begi
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for i=0,3*15+2 do
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ptr[i] = 0
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end
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end
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end
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-- Interfaces to Mapster32's status bar menu
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local pcall = pcall
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function engine.clearMenu()
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C.LM_Clear()
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end
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function engine.registerMenuFunc(name, func, description)
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if (type(name) ~= "string") then
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error("invalid argument #1: must be a string", 2)
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end
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if (type(func) ~= "function") then
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error("invalid argument #2: must be a function", 2)
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end
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if (description~=nil and type(description)~="string") then
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error("invalid argument #3: must be nil or a string", 2)
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end
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local safefunc = function()
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local ok, errmsg = pcall(func)
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if (not ok) then
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return errmsg
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end
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end
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C.LM_Register(name, safefunc, description)
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end
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engine.GETNUMFLAG = {
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NEG_ALLOWED = 1,
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AUTOCOMPL_NAMES = 2,
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AUTOCOMPL_TAGLAB = 4,
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RET_M1_ON_CANCEL = 8,
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NEXTFREE = 16,
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}
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function engine.getnumber16(namestart, num, maxnumber, flags)
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if (C.qsetmode == 200) then
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error("getnumber16 must be called from 2D mode", 2)
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end
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if (type(namestart)~="string") then
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error("invalid argument #1: must be a string", 2)
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end
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return C._getnumber16(namestart, num, maxnumber, flags or 8, nil) -- RET_M1_ON_CANCEL
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end
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function engine.getstring(querystr)
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if (type(querystr) ~= "string") then
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error("invalid argument #2: must be a string", 2)
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end
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local cstr = C.getstring_simple(querystr, nil, 0, 0)
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return cstr~=nil and ffi.string(cstr) or nil
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end
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end
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-- Done!
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return engine
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