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Fix out-of-bounds in 'combine' texture modifier

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Co-authored-by: tenplus1 <tenplus1@users.noreply.github.com>
This commit is contained in:
Niklp
2024-02-26 16:14:54 +01:00
parent e387808065
commit 1fdff47dc8
626 changed files with 36 additions and 26 deletions
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52
api.lua
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@ -467,15 +467,6 @@ signs_lib.charwidth_wide32 = build_char_db(32)
local math_max = math.max
local function fill_line(x, y, w, c, font_size, colorbgw)
c = c or "0"
local tex = { }
for xx = 0, math.max(0, w), colorbgw do
table.insert(tex, (":%d,%d=signs_lib_color_"..font_size.."px_%s.png"):format(x + xx, y, c))
end
return table.concat(tex)
end
-- make char texture file name
-- if texture file does not exist use fallback texture instead
local function char_tex(font_name, ch)
@ -511,6 +502,26 @@ local function char_tex_wide(font_name, ch)
end
end
-- sign colour table
local colgrid = {
["0"] = "000000", -- black
["1"] = "000080", -- blue
["2"] = "008000", -- dark green
["3"] = "008080", -- dark cyan
["4"] = "800000", -- red
["5"] = "800080", -- purple
["6"] = "804000", -- brown
["7"] = "808080", -- light grey
["8"] = "404040", -- dark grey
["9"] = "8080ff", -- light blue
["A"] = "80ff80", -- green
["B"] = "80ffff", -- cyan
["C"] = "ff8080", -- skin pink
["D"] = "ff80ff", -- pink
["E"] = "ffff00", -- yellow
["F"] = "ffffff" -- white
}
local function make_line_texture(line, lineno, pos, line_width, line_height, cwidth_tab, font_size, colorbgw, cwidth_tab_wide, force_unicode_font)
local width = 0
local maxw = 0
@ -647,36 +658,25 @@ local function make_line_texture(line, lineno, pos, line_width, line_height, cwi
local xpos = start_xpos
local ypos = (line_height + def.line_spacing)* lineno + def.y_offset
cur_color = nil
for word_i, word in ipairs(words) do
local xoffs = (xpos - start_xpos)
if (xoffs > 0) and ((xoffs + word.w) > maxw) then
table.insert(texture, fill_line(xpos, ypos, maxw, "n", font_size, colorbgw))
xpos = start_xpos
ypos = ypos + line_height + def.line_spacing
lineno = lineno + 1
if lineno >= def.number_of_lines then break end
table.insert(texture, fill_line(xpos, ypos, maxw, cur_color, font_size, colorbgw))
end
for ch_i, ch in ipairs(word.chars) do
if ch.col ~= cur_color then
cur_color = ch.col
table.insert(texture, fill_line(xpos + ch.off, ypos, maxw, cur_color, font_size, colorbgw))
end
table.insert(texture, (":%d,%d=%s"):format(xpos + ch.off, ypos, ch.tex))
-- colorize character texture
local newtex = ch.tex .. '\\^[colorize\\:#' .. colgrid[ch.col]
table.insert(texture, (":%d,%d=%s"):format(xpos + ch.off, ypos, newtex))
end
table.insert(
texture,
(":%d,%d="):format(xpos + word.w, ypos) .. char_tex(font_name, " ")
)
xpos = xpos + word.w + cwidth_tab[" "]
if xpos >= (line_width + cwidth_tab[" "]) then break end
end
table.insert(texture, fill_line(xpos, ypos, maxw, "n", font_size, colorbgw))
table.insert(texture, fill_line(start_xpos, ypos + line_height, maxw, "n", font_size, colorbgw))
return table.concat(texture), lineno
end
@ -721,7 +721,7 @@ function signs_lib.make_sign_texture(lines, pos)
table.insert(texture, linetex)
lineno = ln + 1
end
table.insert(texture, "^[makealpha:0,0,0")
return table.concat(texture, "")
end