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https://github.com/airstruck/luigi.git
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add dedicated backend (WIP)
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airstruck
288
luigi/backend/ffisdl.lua
Normal file
288
luigi/backend/ffisdl.lua
Normal file
@@ -0,0 +1,288 @@
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local ROOT = (...):gsub('[^.]*.[^.]*$', '')
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local Hooker = require(ROOT .. 'hooker')
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local ffi = require 'ffi'
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local sdl = require((...) .. '.sdl')
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local Image = require((...) .. '.image')
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local Font = require((...) .. '.font')
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local Keyboard = require((...) .. '.keyboard')
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local IntOut = ffi.typeof 'int[1]'
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-- create window and renderer
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local window = sdl.createWindow('', 0, 0, 800, 600,
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sdl.WINDOW_SHOWN)
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if window == nil then
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io.stderr:write(ffi.string(sdl.getError()))
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sdl.quit()
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os.exit(1)
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end
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ffi.gc(window, sdl.destroyWindow)
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local renderer = sdl.createRenderer(window, -1,
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sdl.RENDERER_ACCELERATED + sdl.RENDERER_PRESENTVSYNC)
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if renderer == nil then
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io.stderr:write(ffi.string(sdl.getError()))
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sdl.quit()
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os.exit(1)
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end
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ffi.gc(renderer, sdl.destroyRenderer)
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local Backend = {}
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local callback = {
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draw = function () end,
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resize = function () end,
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mousepressed = function () end,
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mousereleased = function () end,
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mousemoved = function () end,
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keypressed = function () end,
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keyreleased = function () end,
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textinput = function () end,
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}
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Backend.run = function ()
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local event = sdl.Event()
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while true do
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sdl.pumpEvents()
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while sdl.pollEvent(event) ~= 0 do
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if event.type == sdl.QUIT then
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return
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elseif event.type == sdl.WINDOWEVENT
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and event.window.event == sdl.WINDOWEVENT_RESIZED then
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callback.resize(event.window.data1, event.window.data2)
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elseif event.type == sdl.MOUSEBUTTONDOWN then
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callback.mousepressed(event.button.x, event.button.y, event.button.button)
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elseif event.type == sdl.MOUSEBUTTONUP then
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callback.mousereleased(event.button.x, event.button.y, event.button.button)
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elseif event.type == sdl.MOUSEMOTION then
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callback.mousemoved(event.motion.x, event.motion.y)
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elseif event.type == sdl.KEYDOWN then
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local key = Keyboard.stringByKeycode[event.key.keysym.sym]
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callback.keypressed(key, event.key['repeat'])
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elseif event.type == sdl.KEYUP then
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local key = Keyboard.stringByKeycode[event.key.keysym.sym]
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callback.keyreleased(key, event.key['repeat'])
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elseif event.type == sdl.TEXTINPUT then
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callback.textinput(ffi.string(event.text.text))
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end
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end
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sdl.setRenderDrawColor(renderer, 0, 0, 0, 255)
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sdl.renderClear(renderer)
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callback.draw()
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sdl.renderPresent(renderer)
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sdl.delay(1)
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end
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end
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Backend.Cursor = function (image, x, y)
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return sdl.createColorCursor(image.sdlSurface, x, y)
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end
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Backend.Font = Font
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Backend.Image = function (path)
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return Image(renderer, path)
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end
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Backend.Quad = function (x, y, w, h)
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return { x, y, w, h }
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end
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Backend.SpriteBatch = require((...) .. '.spritebatch')
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Backend.draw = function (drawable, x, y, sx, sy)
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return drawable:draw(x, y, sx, sy)
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end
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Backend.drawRectangle = function (mode, x, y, w, h)
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if mode == 'fill' then
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sdl.renderFillRect(renderer, sdl.Rect(x, y, w, h))
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else
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sdl.renderDrawRect(renderer, sdl.Rect(x, y, w, h))
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end
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end
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local currentFont = Font()
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-- print( text, x, y, r, sx, sy, ox, oy, kx, ky )
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Backend.print = function (text, x, y)
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if not text or text == '' then return end
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local font = currentFont.sdlFont
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local color = sdl.Color(currentFont.color)
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local write = Font.SDL2_ttf.TTF_RenderUTF8_Blended
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local surface = write(font, text, color)
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ffi.gc(surface, sdl.freeSurface)
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local texture = sdl.createTextureFromSurface(renderer, surface)
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ffi.gc(texture, sdl.destroyTexture)
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sdl.renderCopy(renderer, texture, nil, sdl.Rect(x, y, surface.w, surface.h))
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end
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Backend.printf = Backend.print
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Backend.getClipboardText = sdl.getClipboardText
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Backend.setClipboardText = sdl.setClipboardText
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Backend.getMousePosition = function ()
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local x, y = IntOut(), IntOut()
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sdl.getMouseState(x, y)
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return x[0], y[0]
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end
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local function SystemCursor (id)
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local cursor = sdl.createSystemCursor(id)
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ffi.gc(cursor, sdl.freeCursor)
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return cursor
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end
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local systemCursors = {
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arrow = SystemCursor(sdl.SYSTEM_CURSOR_ARROW),
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ibeam = SystemCursor(sdl.SYSTEM_CURSOR_IBEAM),
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wait = SystemCursor(sdl.SYSTEM_CURSOR_WAIT),
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crosshair = SystemCursor(sdl.SYSTEM_CURSOR_CROSSHAIR),
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waitarrow = SystemCursor(sdl.SYSTEM_CURSOR_WAITARROW),
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sizenwse = SystemCursor(sdl.SYSTEM_CURSOR_SIZENWSE),
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sizenesw = SystemCursor(sdl.SYSTEM_CURSOR_SIZENESW),
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sizewe = SystemCursor(sdl.SYSTEM_CURSOR_SIZEWE),
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sizens = SystemCursor(sdl.SYSTEM_CURSOR_SIZENS),
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sizeall = SystemCursor(sdl.SYSTEM_CURSOR_SIZEALL),
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no = SystemCursor(sdl.SYSTEM_CURSOR_NO),
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hand = SystemCursor(sdl.SYSTEM_CURSOR_HAND),
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}
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Backend.getSystemCursor = function (name)
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return systemCursors[name] or systemCursors.arrow
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end
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Backend.getWindowSize = function ()
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local x, y = IntOut(), IntOut()
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sdl.getWindowSize(window, x, y)
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return x[0], y[0]
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end
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Backend.getTime = function ()
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return sdl.getTicks() * 0.001
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end
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Backend.isKeyDown = function (...)
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local state = sdl.getKeyboardState(nil)
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for i = 1, select('#', ...) do
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local name = select(i, ...)
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local scan = Keyboard.scancodeByString[name]
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if scan and state[scan] ~= 0 then
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return true
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end
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end
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return false
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end
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Backend.isMouseDown = function ()
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end
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Backend.quit = function ()
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sdl.quit()
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os.exit()
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end
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local lastColor
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Backend.setColor = function (color)
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lastColor = color
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sdl.setRenderDrawColor(renderer,
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color[1], color[2], color[3], color[4] or 255)
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end
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Backend.setCursor = function (cursor)
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sdl.setCursor(cursor or Backend.getSystemCursor('arrow'))
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end
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Backend.setFont = function (font)
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currentFont = font
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end
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local lastScissor
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Backend.setScissor = function (x, y, w, h)
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lastScissor = x and sdl.Rect(x, y, w, h)
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sdl.renderSetClipRect(renderer, lastScissor)
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end
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function Backend.hide (layout)
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for _, item in ipairs(layout.hooks) do
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Hooker.unhook(item)
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end
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layout.hooks = {}
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end
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local function hook (layout, key, method, hookLast)
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layout.hooks[#layout.hooks + 1] = Hooker.hook(
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callback, key, method, hookLast)
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end
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local stack = {}
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Backend.pop = function ()
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local history = stack[#stack]
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Backend.setColor(history.color or { 0, 0, 0, 255 })
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Backend.setScissor(history.scissor)
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stack[#stack] = nil
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end
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Backend.push = function ()
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stack[#stack + 1] = {
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color = lastColor,
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scissor = lastScissor,
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}
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end
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local isMouseDown = function ()
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return sdl.getMouseState(nil, nil) > 0
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end
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function Backend.show (layout)
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local input = layout.input
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hook(layout, 'draw', function ()
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input:handleDisplay(layout)
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end, true)
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hook(layout, 'resize', function (width, height)
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return input:handleReshape(layout, width, height)
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end)
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hook(layout, 'mousepressed', function (x, y, button)
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return input:handlePressStart(layout, button, x, y)
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end)
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hook(layout, 'mousereleased', function (x, y, button)
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return input:handlePressEnd(layout, button, x, y)
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end)
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hook(layout, 'mousemoved', function (x, y, dx, dy)
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if isMouseDown() then
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return input:handlePressedMove(layout, x, y)
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else
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return input:handleMove(layout, x, y)
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end
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end)
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hook(layout, 'keypressed', function (key, isRepeat)
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return input:handleKeyPress(layout, key, Backend.getMousePosition())
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end)
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hook(layout, 'keyreleased', function (key)
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return input:handleKeyRelease(layout, key, Backend.getMousePosition())
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end)
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hook(layout, 'textinput', function (text)
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return input:handleTextInput(layout, text, Backend.getMousePosition())
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end)
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end
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return Backend
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