From fa8f59cf2c37ab8f0a733ba8beb4dcb986036c8a Mon Sep 17 00:00:00 2001
From: Kazhnuz <kazhnuz@kobold.cafe>
Date: Sat, 28 Aug 2021 15:48:27 +0200
Subject: [PATCH] feat: use indirect rendering for menus

---
 .../birb/modules/gui/elements/canvas.lua      | 65 +++++++++++++++++++
 .../birb/modules/gui/menus/flowbox.lua        |  6 +-
 .../birb/modules/gui/menus/grid.lua           |  6 +-
 .../birb/modules/gui/menus/hlistbox.lua       |  6 +-
 .../birb/modules/gui/menus/listbox.lua        |  7 +-
 .../birb/modules/gui/menus/parent.lua         | 10 ++-
 6 files changed, 87 insertions(+), 13 deletions(-)
 create mode 100644 sonic-radiance.love/birb/modules/gui/elements/canvas.lua

diff --git a/sonic-radiance.love/birb/modules/gui/elements/canvas.lua b/sonic-radiance.love/birb/modules/gui/elements/canvas.lua
new file mode 100644
index 0000000..a1f654e
--- /dev/null
+++ b/sonic-radiance.love/birb/modules/gui/elements/canvas.lua
@@ -0,0 +1,65 @@
+local Parent = require "birb.modules.gui.elements.parent"
+local CanvasElement = Parent:extend()
+
+function CanvasElement:new(name, x, y, w, h, r,sx,sy,ox,oy, opacity, depth)
+    self:initCanvas()
+    CanvasElement.super.new(self, name, x, y, w, h)
+    self.r = r or 0
+    self.sx, self.sy = sx or 1, sy or 1
+    self.ox, self.oy = self:parseOrigin(ox, w), self:parseOrigin(oy, h)
+    self.opacity = opacity or 1
+    self.depth = depth or 0
+end
+
+function CanvasElement:initCanvas()
+  self.canvas = {}
+  self.canvas.needRedraw = true
+  self.canvas.texture = nil
+  self.canvas.isAnimated = false
+  self.canvas.padding = 8
+end
+
+function CanvasElement:getCanvasDimensions()
+  return self:getDimensions()
+end
+
+function CanvasElement:redraw()
+    local w, h = self:getDimensions()
+
+    local canvas = love.graphics.newCanvas(w + (self.canvas.padding*2), h + (self.canvas.padding*2))
+    love.graphics.setCanvas(canvas)
+
+    self:drawTexture()
+    self.canvas.needRedraw = false
+    love.graphics.setCanvas()
+    if (self.canvas.isAnimated) then
+      self.canvas.texture = canvas
+    else
+      local imageData = canvas:newImageData()
+      self.canvas.texture = love.graphics.newImage(imageData)
+      canvas:release()
+      imageData:release()
+    end
+end
+
+function CanvasElement:drawTexture()
+
+end
+
+function CanvasElement:parseOrigin(origin, size)
+    if (origin == "center") then
+        return size/2
+    elseif (origin == "end") then
+        return size - self.canvas.padding
+    else
+        return origin or self.canvas.padding
+    end
+end
+
+function CanvasElement:draw()
+    love.graphics.setColor(1, 1, 1, self.opacity)
+    love.graphics.draw(self.canvas.texture, self.x,self.y,self.r,self.sx,self.sy,self.ox,self.oy)
+    love.graphics.setColor(1, 1, 1, 1)
+end
+
+return CanvasElement
\ No newline at end of file
diff --git a/sonic-radiance.love/birb/modules/gui/menus/flowbox.lua b/sonic-radiance.love/birb/modules/gui/menus/flowbox.lua
index f0a40fb..52a8870 100644
--- a/sonic-radiance.love/birb/modules/gui/menus/flowbox.lua
+++ b/sonic-radiance.love/birb/modules/gui/menus/flowbox.lua
@@ -112,10 +112,10 @@ end
 -- DRAW FUNCTIONS
 -- Draw the menu and its content
 
-function FlowBox:draw()
+function FlowBox:drawTexture()
   self.view:updateFirstSlot(self.widget:getSelected())
-  local widgety = self.y
-  local widgetx = self.x
+  local widgety = self.canvas.padding
+  local widgetx = self.canvas.padding
 
   local listWidget = self.widget:getList(self.view.firstSlot, self.view.slotNumber)
 
diff --git a/sonic-radiance.love/birb/modules/gui/menus/grid.lua b/sonic-radiance.love/birb/modules/gui/menus/grid.lua
index 8cd62e3..1bd0bf1 100644
--- a/sonic-radiance.love/birb/modules/gui/menus/grid.lua
+++ b/sonic-radiance.love/birb/modules/gui/menus/grid.lua
@@ -247,12 +247,12 @@ end
 -- DRAW FUNCTIONS
 -- Draw the menu and its content
 
-function GridBox:draw()
+function GridBox:drawTexture()
 
   for i,v in ipairs(self.slots) do
     if self:haveWidget(i) then
-      local widgetx = self.x + (v.x * self.widgetSize.w)
-      local widgety = self.y + (v.y * self.widgetSize.h)
+      local widgetx = self.canvas.padding + (v.x * self.widgetSize.w)
+      local widgety = self.canvas.padding + (v.y * self.widgetSize.h)
       if self.widget:getSelected() == v.widgetID and self:haveFocus() == true then
         self.widget.list[v.widgetID]:drawSelected(widgetx, widgety)
       else
diff --git a/sonic-radiance.love/birb/modules/gui/menus/hlistbox.lua b/sonic-radiance.love/birb/modules/gui/menus/hlistbox.lua
index faec6bc..c10d772 100644
--- a/sonic-radiance.love/birb/modules/gui/menus/hlistbox.lua
+++ b/sonic-radiance.love/birb/modules/gui/menus/hlistbox.lua
@@ -77,15 +77,15 @@ end
 -- DRAW FUNCTIONS
 -- Draw the menu and its content
 
-function HListBox:draw()
+function HListBox:drawTexture()
   self.view:updateFirstSlot(self.widget:getSelected())
 
-  local widgetx = self.x
+  local widgetx = self.canvas.padding
 
   local listWidget = self.widget:getList(self.view.firstSlot, self.view.slotNumber)
 
   for _, widget in ipairs(listWidget) do
-    widget:drawWidget(widgetx, self.y, self.widgetSize.w, self.h)
+    widget:drawWidget(widgetx, self.canvas.padding, self.widgetSize.w, self.h)
     widgetx = widgetx + self.widgetSize.w
   end
 end
diff --git a/sonic-radiance.love/birb/modules/gui/menus/listbox.lua b/sonic-radiance.love/birb/modules/gui/menus/listbox.lua
index d99d614..2a6f30c 100644
--- a/sonic-radiance.love/birb/modules/gui/menus/listbox.lua
+++ b/sonic-radiance.love/birb/modules/gui/menus/listbox.lua
@@ -77,14 +77,15 @@ end
 -- DRAW FUNCTIONS
 -- draw the menu and the rest of content.
 
-function ListBox:draw()
+function ListBox:drawTexture()
   self.view:updateFirstSlot(self.widget:getSelected())
-  local widgety = self.y
+  local widgety = self.canvas.padding
 
   local listWidget = self.widget:getList(self.view.firstSlot, self.view.slotNumber)
 
   for _, widget in ipairs(listWidget) do
-    widget:drawWidget(self.x, widgety, self.w, self.widgetSize.h)
+    print(self.canvas.padding, widgety)
+    widget:drawWidget(self.canvas.padding, widgety, self.w, self.widgetSize.h)
     widgety = widgety + self.widgetSize.h
   end
 end
diff --git a/sonic-radiance.love/birb/modules/gui/menus/parent.lua b/sonic-radiance.love/birb/modules/gui/menus/parent.lua
index 80f0893..dba9084 100644
--- a/sonic-radiance.love/birb/modules/gui/menus/parent.lua
+++ b/sonic-radiance.love/birb/modules/gui/menus/parent.lua
@@ -21,7 +21,7 @@
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ]]
 
-local GuiElement = require "birb.modules.gui.elements.parent"
+local GuiElement = require "birb.modules.gui.elements.canvas"
 
 local Menu = GuiElement:extend()
 local MenuModel = require "birb.modules.gui.menus.model"
@@ -40,6 +40,7 @@ function Menu:new(name, x, y, w, h)
   self:updateWidgetSize()
 
   self:resetSound()
+  self:initCanvas()
 end
 
 -- INTERACTION FUNCTIONS
@@ -78,10 +79,12 @@ end
 function Menu:actionAndCancel(key)
   if key == "A" then
     self.widget:selectedAction()
+    self.canvas.needRedraw = true
   end
 
   if key == "B" then
     self:cancelAction()
+    self.canvas.needRedraw = true
   end
 end
 
@@ -140,6 +143,9 @@ end
 function Menu:updateElement(dt)
   self:update(dt)
   self.widget:update(dt)
+  if (self.canvas.needRedraw or self.canvas.isAnimated) then
+    self:redraw()
+  end
 end
 
 -- DRAW FUNCTIONS
@@ -194,11 +200,13 @@ end
 
 function Menu:setCursor(cursorid)
   self.widget:setCursor(cursorid)
+  self.canvas.needRedraw = true
 end
 
 function Menu:moveCursor(new_selected)
   self:playNavigationSound()
   self.widget:moveCursorAbsolute(new_selected)
+  self.canvas.needRedraw = true
 end
 
 -- SOUND FUNCTION