avoid showing eases out-of-bounds

main.lua

@@ -38,6 +38,10 @@ dropdownWidth = 186
 lineWidth = 2
 fontHeight = love.graphics.getFont():getHeight()
 
+screenshot = false
+screenshotCanvas = nil
+screenshotsize = 512
+
 -- global for convinience's sake
 
 mode = nil
@@ -60,6 +64,33 @@ function love.draw()
   local sw, sh = love.graphics.getDimensions()
   local mx, my = love.mouse.getPosition()
 
+  if screenshot then
+    love.graphics.setCanvas(screenshotCanvas)
+    sw, sh = screenshotsize, screenshotsize
+    love.graphics.setColor(0.09, 0.09, 0.12, 1)
+    love.graphics.rectangle('fill', 0, 0, sw, sh)
+    love.graphics.setColor(0.08, 0.08, 0.1, 1)
+    love.graphics.rectangle('line', 0, 0, sw, sh)
+    graph.render()
+    love.graphics.setCanvas()
+
+    --[[
+    -- for seeing what gets drawn to it
+    love.graphics.setColor(1, 1, 1)
+    love.graphics.draw(screenshotCanvas)
+
+    return
+    ]]
+
+    local ss = screenshotCanvas:newImageData(0, 1, 0, 0, screenshotsize, screenshotsize)
+    ss:encode('png', 'screenshot ' .. os.date('%Y-%m-%d %H-%m') .. '.png')
+    love.system.openURL('file://' .. love.filesystem.getSaveDirectory())
+
+    screenshot = false
+  end
+
+  love.graphics.setCanvas()
+
   -- this is fine to do since all textures are already loaded with nearest
   love.graphics.setDefaultFilter('linear', 'linear')
 

src/button.lua

@@ -115,6 +115,18 @@ function self.createButtons()
         love.system.setClipboardText(s)
       end
     })
+    insertButton(s, {
+      x = outerpadding + padding + 32,
+      y = love.graphics.getHeight() - outerpadding - fontHeight * 4 - padding * 2 - 32,
+      size = 32,
+      name = 'screenshot',
+      displayname = 'Screenshot',
+      tooltip = 'Take a screenshot',
+      func = function()
+        screenshot = true
+        screenshotCanvas = love.graphics.newCanvas()
+      end
+    })
   end
 
   buttons = s

src/graph.lua

@@ -55,7 +55,15 @@ function self.render()
     local csize = 10 -- preview point size
     local size = math.min((sw - outerpadding) - ((dropdown.kget('ease2') or dropdown.kget('ease1')).x + dropdownWidth + padding), sh - outerpadding * 2 - padding * 3 - csize)
 
+    if screenshot then
+      size = screenshotsize - outerpadding * 2
+    end
+
     local x, y, w, h = sw - outerpadding - size, outerpadding, size, size
+    if screenshot then
+      x, y = outerpadding, outerpadding
+    end
+
     love.graphics.setColor(1, 1, 1, 1)
     love.graphics.rectangle('line', x, y, w, h)
 
@@ -77,8 +85,10 @@ function self.render()
 
     -- preview point
     local t = timer % 1
-    love.graphics.setColor(0.4, 0.4, 1, 0.4)
-    love.graphics.line(x + t * w, y, x + margin + t * (w - margin * 2), y + h)
+    if not screenshot then
+      love.graphics.setColor(0.4, 0.4, 1, 0.4)
+      love.graphics.line(x + t * w, y, x + margin + t * (w - margin * 2), y + h)
+    end
 
     -- y = 0 point
     -- todo: this will break with eases that dont have the first point at y0
@@ -89,18 +99,20 @@ function self.render()
     -- polygone
     -- this isnt done with a polygon because else itd waste a Bunch of ram and i kinda, dont want to do that?
     love.graphics.setColor(1, 1, 1, 1)
+    love.graphics.setScissor(x + margin, y + margin, w - (margin * 2), h - (margin * 2))
     local last = (((graph[1] or 0) - 0.5) * zoome) + 0.5
     for gx = 1, quality - 1 do
       local a = gx/quality
       local b = graph[gx + 1] or 0
       b = ((b - 0.5) * zoome) + 0.5
-      local px, py = x + margin + gx * ((w - margin)/quality), y + h - margin - b * (h - margin * 2)
-      local ox, oy = x + margin + (gx - 1) * ((w - margin)/quality), y + h - margin - last * (h - margin * 2)
+      local px, py = x + margin + gx * ((w - margin * 2)/quality), y + h - margin - b * (h - margin * 2)
+      local ox, oy = x + margin + (gx - 1) * ((w - margin * 2)/quality), y + h - margin - last * (h - margin * 2)
       if math.abs(b - last) < 1 then
         love.graphics.line(ox, oy, px, py)
       end
       last = b
     end
+    love.graphics.setScissor()
 
     -- zoom lines
     local a = math.min(math.abs(zoome - 1) * 10, 1)
@@ -116,23 +128,27 @@ function self.render()
     end
 
     -- preview
-    love.graphics.setColor(0.16, 0.16, 0.17, 1)
-    love.graphics.line(x + margin, y + h + padding * 2 + csize/2, x + w - margin, y + h + padding * 2 + csize/2)
-    love.graphics.setColor(0.3, 0.3, 0.31, 1)
-    love.graphics.line(x + margin + (w - margin * 2) * (1 - zoome) * 0.5, y + h + padding * 2 + csize/2, x + w - margin - (w - margin * 2) * (1 - zoome) * 0.5, y + h + padding * 2 + csize/2)
+    if not screenshot then
+      love.graphics.setScissor(x - margin, 0, w + margin * 2, sh)
+      love.graphics.setColor(0.16, 0.16, 0.17, 1)
+      love.graphics.line(x + margin, y + h + padding * 2 + csize/2, x + w - margin, y + h + padding * 2 + csize/2)
+      love.graphics.setColor(0.3, 0.3, 0.31, 1)
+      love.graphics.line(x + margin + (w - margin * 2) * (1 - zoome) * 0.5, y + h + padding * 2 + csize/2, x + w - margin - (w - margin * 2) * (1 - zoome) * 0.5, y + h + padding * 2 + csize/2)
 
-    love.graphics.setColor(0.4, 0.4, 1, 1)
-    local a1 = ease.ease(t)
-    local a2 = ease.ease(math.max(math.min(t - 0.1, 1), 0))
-    local da = ((a1 - 0.5) * zoome) + 0.5
-    if timer % 2 > 1 and math.floor(ease.ease(0) + 0.5) ~= math.floor(ease.ease(1) + 0.5) then
-      da = 1 - da
-    end
-    if minEase then
-      da = da / 2 + 0.5
-    end
+      love.graphics.setColor(0.4, 0.4, 1, 1)
+      local a1 = ease.ease(t)
+      local a2 = ease.ease(math.max(math.min(t - 0.1, 1), 0))
+      local da = ((a1 - 0.5) * zoome) + 0.5
+      if timer % 2 > 1 and math.floor(ease.ease(0) + 0.5) ~= math.floor(ease.ease(1) + 0.5) then
+        da = 1 - da
+      end
+      if minEase then
+        da = da / 2 + 0.5
+      end
 
-    love.graphics.ellipse('fill', x + margin + (w - margin * 2) * da, y + h + padding * 2 + csize/2, csize * (1 + math.min(math.abs(a1 - a2), 3) * 1.2), csize)
+      love.graphics.ellipse('fill', x + margin + (w - margin * 2) * da, y + h + padding * 2 + csize/2, csize * (1 + math.min(math.abs(a1 - a2), 3) * 1.2), csize)
+      love.graphics.setScissor()
+    end
   end
 end