Add images

lib/lume.lua

@@ -624,7 +624,7 @@ function lume.wordwrap(str, limit)
     check = limit
   end
   local rtn = {}
-  local line = ""
+  local line = str:match("^(%s*)")
   for word, spaces in str:gmatch("(%S+)(%s*)") do
     local s = line .. word
     if check(s) then

presentation/commands.fnl

@@ -1,13 +1,20 @@
+(local util (require :lib.util))
 (local core (require :core))
 (local command (require :core.command))
 (local keymap (require :core.keymap))
 (local SlideshowView (require :presentation.engine))
 
+(fn set-scale [multiplier]
+  (set _G.SCALE (* (love.graphics.getDPIScale) multiplier))
+  (util.hotswap :core.style))
+
 (command.add nil {
   "presentation:start" (fn []
     (let [node (core.root_view:get_active_node)]
-      (node:add_view (SlideshowView (require :presentation.slides))))
+      (node:add_view (SlideshowView (util.reload :presentation.slides))))
   )
+  "presentation:scale-up" #(set-scale 2)
+  "presentation:restore-scale" #(set-scale 1)
 })
 (command.add :presentation.engine {
   "presentation:next" #(core.active_view:advance)
@@ -18,7 +25,7 @@
 (keymap.add {
   "left"        "presentation:prev"
   "right"       "presentation:next"
-  ","     "presentation:prev-slide"
+  "ctrl+left"   "presentation:prev-slide"
-  "."     "presentation:next-slide"
+  "ctrl+right"  "presentation:next-slide"
 })
 

presentation/engine.fnl

@@ -9,23 +9,25 @@
   (icollect [_ slide (ipairs slides)]
     (icollect [_ elem (ipairs slide)]
       (match (type elem)
-        :table (do (set style elem) nil)
+        (where :table elem.style) (do (set style elem) nil)
+        :table elem
         :string (lume.merge style {:text elem})))))
 
 (fn SlideshowView.new [self slides]
   (SlideshowView.super.new self)
   (set self.slides slides)
+  (set self.imagecache {})
   (set self.islide 1)
   (set self.ielem 0)
   (self:advance))
 
 (fn SlideshowView.next-slide [self]
-  (set self.islide (if (= self.islide (length self.slides)) 1 (+ self.islide 1)))
+  (set self.islide (if (>= self.islide (length self.slides)) 1 (+ self.islide 1)))
   (set self.ielem 0)
   (self:advance))
 
 (fn SlideshowView.prev-slide [self]
-  (set self.islide (if (= self.islide 1) (length self.slides) (- self.islide 1)))
+  (set self.islide (if (<= self.islide 1) (length self.slides) (- self.islide 1)))
   (set self.ielem (+ 1 (length (. self.slides self.islide))))
   (self:back))
 
@@ -46,18 +48,60 @@
     (if ielemNext (set self.ielem ielemNext)
       (self:prev-slide))))
 
-(fn SlideshowView.render-element [self element y]
+(fn SlideshowView.load-image [self {:image filename}]
-  (let [x (+ self.position.x
+  (when (= (. self.imagecache filename) nil)
+    (tset self.imagecache filename (love.graphics.newImage filename)))
+  (. self.imagecache filename))
+
+(fn SlideshowView.justify [self element width]
   (match element.justify
-              :center (/ (- self.size.x (element.font:get_width element.text)) 2)
+    :center (/ (- self.size.x width) 2)
-              :left style.padding.x))]
+    :right  (- self.size.x width style.padding.x)
-    (renderer.draw_text element.font element.text x y element.color)
+    _       style.padding.x))
-    (+ y (* style.padding.y 2) (element.font:get_height))))
+
+(fn SlideshowView.this-y [self element y]
+  (if element.topPadding (+ y element.topPadding)
+    (+ y style.padding.y)))
+
+(fn SlideshowView.next-y [self element height y]
+  (if element.lowerPadding (+ y height element.lowerPadding)
+      element.overlay y
+    (+ y height style.padding.y)))
+
+(fn SlideshowView.word-wrap [self element]
+  (let [letter-width (element.font:get_width "m")
+        screen-width (- self.size.x style.padding.x style.padding.x)
+        max-letters (math.floor (/ screen-width letter-width))
+        wrapped (lume.wordwrap element.text max-letters)
+        lines (icollect [line (string.gmatch wrapped "([^\n]+)")] line)]
+    lines))
+
+(fn SlideshowView.render-element [self element y]
+  (if element.text
+      (let [lines (self:word-wrap element)
+            line-height (element.font:get_height)
+            full-height (+ (* line-height (length lines)) (* style.padding.y (- (length lines) 1)))]
+        (each [iline line (ipairs lines)]
+          (let [width (element.font:get_width line) ;; todo: word-wrapping
+                x (+ self.position.x (self:justify element width))
+                yline (+ y (* (+ (element.font:get_height) style.padding.y) (- iline 1)))]
+            (renderer.draw_text element.font line x yline element.color)))
+        (self:next-y element full-height y))
+
+      element.image
+      (let [image (self:load-image element)
+            x (+ self.position.x (self:justify element (image:getWidth)))]
+        (love.graphics.setColor 1 1 1 element.alpha)
+        (love.graphics.draw image x y)
+        (self:next-y element (image:getHeight) y))
+    y))
 
 (fn SlideshowView.draw [self]
   (self:draw_background style.background)
-  (var y (+ style.padding.y self.position.y))
+  (var y self.position.y)
   (each [ielem element (ipairs (. self.slides self.islide)) :until (> ielem self.ielem)]
-    (set y (self:render-element element y))))
+    (set y (self:render-element element (self:this-y element y)))))
+
+(fn SlideshowView.get_name [self] "] KFest 2021")
 
 SlideshowView

presentation/slides.fnl

@@ -1,26 +1,90 @@
 (local util (require :lib.util))
+(local lume (require :lib.lume))
 (local {: parse} (util.require :presentation.engine))
 (local style (require :core.style))
 (local h
-  {:font (renderer.font.load "presentation/font/PrintChar21.ttf" (* 64 SCALE))
+  {:style true
+   :font (renderer.font.load "presentation/font/PrintChar21.ttf" (* 64 SCALE))
    :color style.caret
-   :justify :center})
+   :justify :center
+   :topPadding (* style.padding.y 2)
+   :lowerPadding 64})
 (local **
-  {:font (renderer.font.load "presentation/font/PRNumber3.ttf" (* 32 SCALE))
+  {:style true
+   :font (renderer.font.load "presentation/font/PRNumber3.ttf" (* 32 SCALE))
    :color style.text
    :justify :left
    :pause-after true})
+(fn p [style] (lume.merge style {:pause-after true}))
+(fn np [style] (lume.merge style {:pause-after false}))
+
+(fn bgimg [filename] {:image filename :justify :center :overlay true :alpha 0.3 :topPadding 0})
 
 (parse [
-  [h "Some Background"
+  [h "" ""
+     "Honeylisp" ""
+   (np **) "Jeremy Penner"
+           "https://spindleyq.itch.io/"
+           "https://blog.information-superhighway.net/"
+           "https://bitbucket.org/SpindleyQ/honeylisp"
+           "https://gamemaking.social/@SpindleyQ"
+           "https://twitter.com/SpindleyQ"
+   {:pause-after true}]
+  [(bgimg "presentation/pics/pete286.jpeg")
+   h "Some Background"
    ** "In 2019 I built a 16-bit MS-DOS game engine."
       "* Built on hardware"
-      "* Using only period software"
+      "* Using only period-appropriate software (Turbo C, NeoPaint)"
-      "* Powered by Forth"]
+      "* Powered by Forth"
-  [h "Neut Tower"
+      "* Integrated custom tools"
+      "* Interactive development via serial terminal"]
+  [(bgimg "presentation/pics/ggj2020.jpeg")
+   h "Neut Tower"
    ** "In 2020, I did the Global Game Jam on my 286."
-      "Finished the 'Shareware Episode' a couple of months later."]
+      "Finished 'Shareware Episode 1' a couple of months later."]
-  [h "Then Kansasfest Happened." ** ""]
+  [h "The Idea"
-  [h "Oh Dang Bill"
+   ** "What if I took a similar DIY approach with modern tools?"
-   ** "Oh gee oh whiz on toast"]
+      "* I'd done Forth; what about Lisp?"
+      "* How far can I push fast iterative development?"
+      "* Could I integrate an editor?"
+      "* How can I leverage emulation?"]
+  [h "Honeylisp"
+   ** "* Written in Fennel, a Lisp that compiles to Lua"
+      "* Assembler"
+      "* Forth-like 'virtual machine' / inner interpreter"
+      "* 'lite' editor, ported to love2d"
+      "  * Integrated custom editors"
+      "* MAME integration"
+      "  * Upload new builds directly into RAM"
+      "  * Interactive code injection"
+      "  * Hot code reload"
+      "* Tape upload"
+      "* ProDOS disk image generation"]
+  [h "Assembler"
+   ** "Represent instructions using Fennel data literals"
+      "  [:lda 0xff]"
+      "Represent labels with Fennel strings"
+      "  :loop [:bne :loop]"
+      "Lexical scope with nested blocks"
+      "  [:block :loop (generate-loop-code) [:bne :loop]]"]
+  [h "Wait WTF Is An Assembler"
+   ** "It's just converting mnemonics to bytes, right?"
+      {:image "presentation/pics/assembly-markup.png" :justify :center :pause-after true}
+      "Whoooops, actually the hard part is converting labels to addresses"
+      "Zero-page instructions are a different size, which messes up data layout!"
+      "Initial pass is needed to gather all symbols to determine sizes"
+      "What about data?"
+      "  [:db 123] [:dw 12345] [:bytes \"HELLO WORLD\"] [:ref :hello]"
+      "Must be able to line up bytes on page boundaries"
+      "  [:align 0x100]"]
+  [h "Virtual Machine"
+     {:image "presentation/pics/thinkhard.png" :justify :center}
+   ** "Not super keen on writing a complicated compiler"
+      "I'm already very comfortable with Forth"
+      "Let's build a stack machine!"
+      "\"Direct threaded\" inner interpreter"
+      "\"Immediate words\" can be Fennel functions that generate code!"]
+  [h "Extensible Assembler??"
+   ** "How do you turn code into bytes?"
+      "  [:vm 1 2 :+ :.]"]
 ])