6.8 KiB
local Render = {} Render.__index = Render local colorChars = require("libraries/colorHex")
function Render.new(terminal) local self = setmetatable({}, Render) self.terminal = terminal self.width, self.height = terminal.getSize()
self.buffer = {
text = {},
fg = {},
bg = {},
dirtyRects = {}
}
for y=1, self.height do
self.buffer.text[y] = string.rep(" ", self.width)
self.buffer.fg[y] = string.rep("0", self.width)
self.buffer.bg[y] = string.rep("f", self.width)
end
return self
end
function Render:addDirtyRect(x, y, width, height) table.insert(self.buffer.dirtyRects, { x = x, y = y, width = width, height = height }) end
function Render:blit(x, y, text, fg, bg) if y < 1 or y > self.height then return self end if(#text ~= #fg or #text ~= #bg)then error("Text, fg, and bg must be the same length") end
self.buffer.text[y] = self.buffer.text[y]:sub(1,x-1) .. text .. self.buffer.text[y]:sub(x+#text)
self.buffer.fg[y] = self.buffer.fg[y]:sub(1,x-1) .. fg .. self.buffer.fg[y]:sub(x+#fg)
self.buffer.bg[y] = self.buffer.bg[y]:sub(1,x-1) .. bg .. self.buffer.bg[y]:sub(x+#bg)
self:addDirtyRect(x, y, #text, 1)
return self
end
function Render:multiBlit(x, y, width, height, text, fg, bg) if y < 1 or y > self.height then return self end if(#text ~= #fg or #text ~= #bg)then error("Text, fg, and bg must be the same length") end
text = text:rep(width)
fg = fg:rep(width)
bg = bg:rep(width)
for dy=0, height-1 do
local cy = y + dy
if cy >= 1 and cy <= self.height then
self.buffer.text[cy] = self.buffer.text[cy]:sub(1,x-1) .. text .. self.buffer.text[cy]:sub(x+#text)
self.buffer.fg[cy] = self.buffer.fg[cy]:sub(1,x-1) .. fg .. self.buffer.fg[cy]:sub(x+#fg)
self.buffer.bg[cy] = self.buffer.bg[cy]:sub(1,x-1) .. bg .. self.buffer.bg[cy]:sub(x+#bg)
end
end
self:addDirtyRect(x, y, width, height)
return self
end
function Render:textFg(x, y, text, fg) if y < 1 or y > self.height then return self end fg = colorChars[fg] or "0"
self.buffer.text[y] = self.buffer.text[y]:sub(1,x-1) .. text .. self.buffer.text[y]:sub(x+#text)
self.buffer.fg[y] = self.buffer.fg[y]:sub(1,x-1) .. fg:rep(#text) .. self.buffer.fg[y]:sub(x+#text)
self:addDirtyRect(x, y, #text, 1)
return self
end
function Render:textBg(x, y, text, bg) if y < 1 or y > self.height then return self end bg = colorChars[bg] or "f"
self.buffer.text[y] = self.buffer.text[y]:sub(1,x-1) .. text .. self.buffer.text[y]:sub(x+#text)
self.buffer.bg[y] = self.buffer.bg[y]:sub(1,x-1) .. bg:rep(#text) .. self.buffer.bg[y]:sub(x+#text)
self:addDirtyRect(x, y, #text, 1)
return self
end
function Render:text(x, y, text) if y < 1 or y > self.height then return self end
self.buffer.text[y] = self.buffer.text[y]:sub(1,x-1) .. text .. self.buffer.text[y]:sub(x+#text)
self:addDirtyRect(x, y, #text, 1)
return self
end
function Render:fg(x, y, fg) if y < 1 or y > self.height then return self end
self.buffer.fg[y] = self.buffer.fg[y]:sub(1,x-1) .. fg .. self.buffer.fg[y]:sub(x+#fg)
self:addDirtyRect(x, y, #fg, 1)
return self
end
function Render:bg(x, y, bg) if y < 1 or y > self.height then return self end
self.buffer.bg[y] = self.buffer.bg[y]:sub(1,x-1) .. bg .. self.buffer.bg[y]:sub(x+#bg)
self:addDirtyRect(x, y, #bg, 1)
return self
end
function Render:blit(x, y, text, fg, bg) if y < 1 or y > self.height then return self end if(#text ~= #fg or #text ~= #bg)then error("Text, fg, and bg must be the same length") end
self.buffer.text[y] = self.buffer.text[y]:sub(1,x-1) .. text .. self.buffer.text[y]:sub(x+#text)
self.buffer.fg[y] = self.buffer.fg[y]:sub(1,x-1) .. fg .. self.buffer.fg[y]:sub(x+#fg)
self.buffer.bg[y] = self.buffer.bg[y]:sub(1,x-1) .. bg .. self.buffer.bg[y]:sub(x+#bg)
self:addDirtyRect(x, y, #text, 1)
return self
end
function Render:clear(bg) local bgChar = colorChars[bg] or "f" for y=1, self.height do self.buffer.text[y] = string.rep(" ", self.width) self.buffer.fg[y] = string.rep("0", self.width) self.buffer.bg[y] = string.rep(bgChar, self.width) self:addDirtyRect(1, y, self.width, 1) end return self end
function Render:render()
local mergedRects = {}
for _, rect in ipairs(self.buffer.dirtyRects) do
local merged = false
for _, existing in ipairs(mergedRects) do
if self:rectOverlaps(rect, existing) then
self:mergeRects(existing, rect)
merged = true
break
end
end
if not merged then
table.insert(mergedRects, rect)
end
end
for _, rect in ipairs(mergedRects) do
for y = rect.y, rect.y + rect.height - 1 do
if y >= 1 and y <= self.height then
self.terminal.setCursorPos(rect.x, y)
self.terminal.blit(
self.buffer.text[y]:sub(rect.x, rect.x + rect.width - 1),
self.buffer.fg[y]:sub(rect.x, rect.x + rect.width - 1),
self.buffer.bg[y]:sub(rect.x, rect.x + rect.width - 1)
)
end
end
end
self.buffer.dirtyRects = {}
if self.blink then
self.terminal.setCursorPos(self.xCursor, self.yCursor)
self.terminal.setCursorBlink(true)
else
self.terminal.setCursorBlink(false)
end
return self
end
function Render:rectOverlaps(r1, r2) return not (r1.x + r1.width <= r2.x or r2.x + r2.width <= r1.x or r1.y + r1.height <= r2.y or r2.y + r2.height <= r1.y) end
function Render:mergeRects(target, source) local x1 = math.min(target.x, source.x) local y1 = math.min(target.y, source.y) local x2 = math.max(target.x + target.width, source.x + source.width) local y2 = math.max(target.y + target.height, source.y + source.height)
target.x = x1
target.y = y1
target.width = x2 - x1
target.height = y2 - y1
end
function Render:setCursor(x, y, blink) self.terminal.setCursorPos(x, y) self.terminal.setCursorBlink(blink) self.xCursor = x self.yCursor = y self.blink = blink return self end
function Render:clearArea(x, y, width, height, bg) local bgChar = colorChars[bg] or "f" for dy=0, height-1 do local cy = y + dy if cy >= 1 and cy <= self.height then local text = string.rep(" ", width) local color = string.rep(bgChar, width) self:blit(x, cy, text, "0", bgChar) end end return self end
function Render:getSize() return self.width, self.height end
return Render