mirror of https://github.com/kepler155c/opus
499 lines
10 KiB
Lua
499 lines
10 KiB
Lua
local class = require('class')
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local Region = require('ui.region')
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local Util = require('util')
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local _rep = string.rep
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local _sub = string.sub
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local _gsub = string.gsub
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local colors = _G.colors
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local Canvas = class()
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Canvas.colorPalette = { }
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Canvas.darkPalette = { }
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Canvas.grayscalePalette = { }
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for n = 1, 16 do
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Canvas.colorPalette[2 ^ (n - 1)] = _sub("0123456789abcdef", n, n)
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Canvas.grayscalePalette[2 ^ (n - 1)] = _sub("088888878877787f", n, n)
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Canvas.darkPalette[2 ^ (n - 1)] = _sub("8777777f77fff77f", n, n)
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end
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function Canvas:init(args)
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self.x = 1
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self.y = 1
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self.layers = { }
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Util.merge(self, args)
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self.ex = self.x + self.width - 1
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self.ey = self.y + self.height - 1
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if not self.palette then
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if self.isColor then
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self.palette = Canvas.colorPalette
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else
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self.palette = Canvas.grayscalePalette
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end
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end
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self.lines = { }
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for i = 1, self.height do
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self.lines[i] = { }
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end
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end
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function Canvas:move(x, y)
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self.x, self.y = x, y
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self.ex = self.x + self.width - 1
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self.ey = self.y + self.height - 1
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end
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function Canvas:resize(w, h)
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for i = self.height, h do
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self.lines[i] = { }
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end
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while #self.lines > h do
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table.remove(self.lines, #self.lines)
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end
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if w ~= self.width then
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for i = 1, self.height do
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self.lines[i] = { dirty = true }
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end
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end
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self.ex = self.x + w - 1
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self.ey = self.y + h - 1
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self.width = w
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self.height = h
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end
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function Canvas:copy()
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local b = Canvas({
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x = self.x,
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y = self.y,
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width = self.width,
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height = self.height,
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isColor = self.isColor,
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})
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for i = 1, self.height do
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b.lines[i].text = self.lines[i].text
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b.lines[i].fg = self.lines[i].fg
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b.lines[i].bg = self.lines[i].bg
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end
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return b
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end
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function Canvas:addLayer(layer)
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local canvas = Canvas({
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x = layer.x,
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y = layer.y,
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width = layer.width,
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height = layer.height,
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isColor = self.isColor,
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})
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canvas.parent = self
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table.insert(self.layers, canvas)
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return canvas
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end
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function Canvas:removeLayer()
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for k, layer in pairs(self.parent.layers) do
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if layer == self then
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self:setVisible(false)
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table.remove(self.parent.layers, k)
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break
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end
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end
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end
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function Canvas:setVisible(visible)
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self.visible = visible
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if not visible then
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self.parent:dirty()
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-- set parent's lines to dirty for each line in self
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end
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end
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function Canvas:write(x, y, text, bg, fg)
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if bg then
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bg = _rep(self.palette[bg], #text)
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end
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if fg then
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fg = _rep(self.palette[fg], #text)
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end
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self:writeBlit(x, y, text, bg, fg)
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end
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function Canvas:writeBlit(x, y, text, bg, fg)
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if y > 0 and y <= #self.lines and x <= self.width then
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local width = #text
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-- fix ffs
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if x < 1 then
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text = _sub(text, 2 - x)
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if bg then
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bg = _sub(bg, 2 - x)
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end
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if bg then
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fg = _sub(fg, 2 - x)
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end
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width = width + x - 1
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x = 1
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end
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if x + width - 1 > self.width then
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text = _sub(text, 1, self.width - x + 1)
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if bg then
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bg = _sub(bg, 1, self.width - x + 1)
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end
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if bg then
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fg = _sub(fg, 1, self.width - x + 1)
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end
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width = #text
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end
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if width > 0 then
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local function replace(sstr, pos, rstr, width)
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if pos == 1 and width == self.width then
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return rstr
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elseif pos == 1 then
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return rstr .. _sub(sstr, pos+width)
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elseif pos + width > self.width then
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return _sub(sstr, 1, pos-1) .. rstr
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end
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return _sub(sstr, 1, pos-1) .. rstr .. _sub(sstr, pos+width)
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end
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local line = self.lines[y]
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line.dirty = true
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line.text = replace(line.text, x, text, width)
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if fg then
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line.fg = replace(line.fg, x, fg, width)
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end
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if bg then
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line.bg = replace(line.bg, x, bg, width)
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end
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end
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end
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end
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function Canvas:writeLine(y, text, fg, bg)
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self.lines[y].dirty = true
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self.lines[y].text = text
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self.lines[y].fg = fg
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self.lines[y].bg = bg
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end
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function Canvas:reset()
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self.regions = nil
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end
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function Canvas:clear(bg, fg)
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local text = _rep(' ', self.width)
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fg = _rep(self.palette[fg or colors.white], self.width)
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bg = _rep(self.palette[bg or colors.black], self.width)
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for i = 1, self.height do
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self:writeLine(i, text, fg, bg)
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end
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end
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function Canvas:punch(rect)
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if not self.regions then
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self.regions = Region.new(self.x, self.y, self.ex, self.ey)
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end
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self.regions:subRect(rect.x, rect.y, rect.ex, rect.ey)
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end
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function Canvas:blitClipped(device)
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for _,region in ipairs(self.regions.region) do
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self:blit(device,
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{ x = region[1] - self.x + 1,
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y = region[2] - self.y + 1,
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ex = region[3]- self.x + 1,
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ey = region[4] - self.y + 1 },
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{ x = region[1], y = region[2] })
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end
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end
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function Canvas:redraw(device)
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self:reset()
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if #self.layers > 0 then
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for _,layer in pairs(self.layers) do
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self:punch(layer)
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end
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self:blitClipped(device)
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else
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self:blit(device)
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end
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self:clean()
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end
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function Canvas:isDirty()
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for _, line in pairs(self.lines) do
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if line.dirty then
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return true
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end
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end
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end
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function Canvas:dirty()
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for _, line in pairs(self.lines) do
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line.dirty = true
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end
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end
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function Canvas:clean()
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for _, line in pairs(self.lines) do
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line.dirty = false
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end
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end
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function Canvas:render(device, layers) --- redrawAll ?
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layers = layers or self.layers
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if #layers > 0 then
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self.regions = Region.new(self.x, self.y, self.ex, self.ey)
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local l = Util.shallowCopy(layers)
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for _, canvas in ipairs(layers) do
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table.remove(l, 1)
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if canvas.visible then
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self:punch(canvas)
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canvas:render(device, l)
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end
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end
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self:blitClipped(device)
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self:reset()
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else
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self:blit(device)
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end
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self:clean()
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end
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function Canvas:blit(device, src, tgt)
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src = src or { x = 1, y = 1, ex = self.ex - self.x + 1, ey = self.ey - self.y + 1 }
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tgt = tgt or self
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for i = 0, src.ey - src.y do
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local line = self.lines[src.y + i]
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if line and line.dirty then
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local t, fg, bg = line.text, line.fg, line.bg
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if src.x > 1 or src.ex < self.ex then
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t = _sub(t, src.x, src.ex)
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fg = _sub(fg, src.x, src.ex)
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bg = _sub(bg, src.x, src.ex)
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end
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--if tgt.y + i > self.ey then -- wrong place to do clipping ??
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-- break
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--end
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device.setCursorPos(tgt.x, tgt.y + i)
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device.blit(t, fg, bg)
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end
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end
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end
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function Canvas:applyPalette(palette)
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local lookup = { }
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for n = 1, 16 do
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lookup[self.palette[2 ^ (n - 1)]] = palette[2 ^ (n - 1)]
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end
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for _, l in pairs(self.lines) do
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l.fg = _gsub(l.fg, '%w', lookup)
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l.bg = _gsub(l.bg, '%w', lookup)
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l.dirty = true
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end
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self.palette = palette
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end
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function Canvas.convertWindow(win, parent, wx, wy)
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local w, h = win.getSize()
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win.canvas = Canvas({
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x = wx,
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y = wy,
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width = w,
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height = h,
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isColor = win.isColor(),
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})
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function win.clear()
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win.canvas:clear(win.getBackgroundColor(), win.getTextColor())
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end
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function win.clearLine()
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local _, y = win.getCursorPos()
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win.canvas:write(1,
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y,
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_rep(' ', win.canvas.width),
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win.getBackgroundColor(),
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win.getTextColor())
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end
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function win.write(str)
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local x, y = win.getCursorPos()
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win.canvas:write(x,
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y,
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str,
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win.getBackgroundColor(),
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win.getTextColor())
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win.setCursorPos(x + #str, y)
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end
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function win.blit(text, fg, bg)
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local x, y = win.getCursorPos()
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win.canvas:writeBlit(x, y, text, bg, fg)
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end
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function win.redraw()
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win.canvas:redraw(parent)
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end
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function win.scroll(n)
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table.insert(win.canvas.lines, table.remove(win.canvas.lines, 1))
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win.canvas.lines[#win.canvas.lines].text = _rep(' ', win.canvas.width)
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win.canvas:dirty()
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end
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function win.reposition(x, y, width, height)
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win.canvas.x, win.canvas.y = x, y
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win.canvas:resize(width or win.canvas.width, height or win.canvas.height)
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end
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win.clear()
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end
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function Canvas.scrollingWindow(win, wx, wy)
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local w, h = win.getSize()
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local scrollPos = 0
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local maxScroll = h
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-- canvas lines are are a sliding window within the local lines table
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local lines = { }
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local parent
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local canvas = Canvas({
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x = wx,
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y = wy,
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width = w,
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height = h,
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isColor = win.isColor(),
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})
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win.canvas = canvas
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local function scrollTo(p, forceRedraw)
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local ms = #lines - canvas.height -- max scroll
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p = math.min(math.max(p, 0), ms) -- normalize
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if p ~= scrollPos or forceRedraw then
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scrollPos = p
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for i = 1, canvas.height do
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canvas.lines[i] = lines[i + scrollPos]
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end
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canvas:dirty()
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end
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end
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function win.blit(text, fg, bg)
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local x, y = win.getCursorPos()
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win.canvas:writeBlit(x, y, text, bg, fg)
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win.redraw()
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end
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function win.clear()
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lines = { }
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for i = 1, canvas.height do
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lines[i] = canvas.lines[i]
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end
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scrollPos = 0
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canvas:clear(win.getBackgroundColor(), win.getTextColor())
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win.redraw()
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end
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function win.clearLine()
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local _, y = win.getCursorPos()
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scrollTo(#lines - canvas.height)
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win.canvas:write(1,
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y,
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_rep(' ', win.canvas.width),
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win.getBackgroundColor(),
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win.getTextColor())
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win.redraw()
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end
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function win.redraw()
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if parent and canvas.visible then
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local x, y = win.getCursorPos()
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for i = 1, canvas.height do
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local line = canvas.lines[i]
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if line and line.dirty then
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parent.setCursorPos(canvas.x, canvas.y + i - 1)
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parent.blit(line.text, line.fg, line.bg)
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line.dirty = false
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end
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end
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win.setCursorPos(x, y)
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end
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end
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-- doesn't support negative scrolling...
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function win.scroll(n)
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for _ = 1, n do
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lines[#lines + 1] = {
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text = _rep(' ', canvas.width),
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fg = _rep(canvas.palette[win.getTextColor()], canvas.width),
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bg = _rep(canvas.palette[win.getBackgroundColor()], canvas.width),
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}
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end
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while #lines > maxScroll do
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table.remove(lines, 1)
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end
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scrollTo(maxScroll, true)
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win.redraw()
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end
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function win.scrollDown()
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scrollTo(scrollPos + 1)
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win.redraw()
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end
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function win.scrollUp()
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scrollTo(scrollPos - 1)
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win.redraw()
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end
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function win.setMaxScroll(ms)
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maxScroll = ms
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end
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function win.setParent(p)
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parent = p
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end
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function win.write(str)
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str = tostring(str) or ''
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local x, y = win.getCursorPos()
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scrollTo(#lines - canvas.height)
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win.blit(str,
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_rep(canvas.palette[win.getTextColor()], #str),
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_rep(canvas.palette[win.getBackgroundColor()], #str))
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win.setCursorPos(x + #str, y)
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end
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function win.reposition(x, y, width, height)
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win.canvas.x, win.canvas.y = x, y
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win.canvas:resize(width or win.canvas.width, height or win.canvas.height)
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end
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win.clear()
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end
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return Canvas
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