Update to love12; fix transparency

main.lua

@@ -16,7 +16,7 @@ z._height_scale = 6
 
 for i = 1, 32 do
 	for j = 1, 32 do
-		local layers = love.math.noise(i * 0.1, j * 0.1) * 20 + 12
+		local layers = love.math.simplexNoise(i * 0.06, j * 0.06) * 20 + 12
 		z:put(i * 24, j * 24, BIG_BLOCK, math.floor(layers) + 1, color)
 	end
 end

zprite/init.lua

@@ -1,11 +1,13 @@
 ---@class zprite
----@field _texture love.Image
----@field _instance_vertex_count integer
----@field _mesh love.Mesh
----@field _instance_mesh love.Mesh
----@field _instances {}[]
----@field _height_scale number
----@field _changed boolean
+---@field private _texture love.Image
+---@field private _instance_vertex_count integer
+---@field private _mesh love.Mesh
+---@field private _instance_buffer love.Buffer
+---@field private _instances {integer: {}[]}
+---@field private _top_layer integer
+---@field private _height_scale number
+---@field private _changed boolean
+---@field private _count integer
 local zprite = {}
 zprite.__index = zprite
 
@@ -13,11 +15,11 @@ local ZPRITE_SHADER = love.graphics.newShader([[
 varying vec4 VsColorOut;
 
 #ifdef VERTEX
-attribute vec2 InstancePosition;
-attribute vec2 InstanceTextureOffset;
-attribute vec2 InstanceScale;
-attribute float InstanceLayer;
-attribute vec4 InstanceColor;
+layout (location = 3) attribute vec2 InstancePosition;
+layout (location = 4) attribute vec2 InstanceTextureOffset;
+layout (location = 5) attribute vec2 InstanceScale;
+layout (location = 6) attribute float InstanceLayer;
+layout (location = 7) attribute vec4 InstanceColor;
 
 uniform float HeightScale;
 
@@ -68,29 +70,30 @@ function zprite.new(texture, max_instances)
 
 	obj._texture = texture
 	obj._instance_vertex_count = max_instances or 16384
-	obj._mesh = love.graphics.newMesh(
-		{ { "VertexPosition", "float", 2 }, { "VertexTexCoord", "float", 2 } },
-		vertices,
-		"strip",
-		"static"
-	)
+	obj._mesh = love.graphics.newMesh({
+		{ name = "VertexPosition", format = "floatvec2", location = 0 },
+		{ name = "VertexTexCoord", format = "floatvec2", location = 1 },
+	}, vertices, "strip", "static")
 	obj._mesh:setTexture(texture)
-	obj._instance_mesh = love.graphics.newMesh({
-		{ "InstancePosition", "float", 2 },
-		{ "InstanceTextureOffset", "float", 2 },
-		{ "InstanceScale", "float", 2 },
-		{ "InstanceLayer", "float", 1 },
-		{ "InstanceColor", "float", 4 },
-	}, obj._instance_vertex_count, nil, "dynamic")
+	obj._instance_buffer = love.graphics.newBuffer({
+		{ name = "InstancePosition", format = "floatvec2", location = 3 },
+		{ name = "InstanceTextureOffset", format = "floatvec2", location = 4 },
+		{ name = "InstanceScale", format = "floatvec2", location = 5 },
+		{ name = "InstanceLayer", format = "float", location = 6 },
+		{ name = "InstanceColor", format = "floatvec4", location = 7 },
+	}, obj._instance_vertex_count, { vertex = true })
 	obj._instances = {}
 	obj._height_scale = 4
 	obj._changed = false
 
-	obj._mesh:attachAttribute("InstancePosition", obj._instance_mesh, "perinstance")
-	obj._mesh:attachAttribute("InstanceTextureOffset", obj._instance_mesh, "perinstance")
-	obj._mesh:attachAttribute("InstanceScale", obj._instance_mesh, "perinstance")
-	obj._mesh:attachAttribute("InstanceLayer", obj._instance_mesh, "perinstance")
-	obj._mesh:attachAttribute("InstanceColor", obj._instance_mesh, "perinstance")
+	obj._mesh:attachAttribute(3, obj._instance_buffer, "perinstance")
+	obj._mesh:attachAttribute(4, obj._instance_buffer, "perinstance")
+	obj._mesh:attachAttribute(5, obj._instance_buffer, "perinstance")
+	obj._mesh:attachAttribute(6, obj._instance_buffer, "perinstance")
+	obj._mesh:attachAttribute(7, obj._instance_buffer, "perinstance")
+
+	obj._top_layer = 0
+	obj._count = 0
 
 	return obj
 end
@@ -99,6 +102,8 @@ end
 function zprite:clear()
 	-- no need to set _changed to true, as #self._instances will be 0
 	self._instances = {}
+	self._top_layer = 0
+	self._count = 0
 end
 
 --- Add an 'entity' to be rendered
@@ -126,7 +131,14 @@ function zprite:put(x, y, quad, layer_count, color_map, base_layer)
 		if not a then
 			a = 1
 		end
-		table.insert(self._instances, { x, y, qx / tw, qy / th, qw, qh, i + base_layer, r, g, b, a })
+		if not self._instances[i + base_layer] then
+			self._instances[i + base_layer] = {}
+			if i > self._top_layer then
+				self._top_layer = i
+			end
+		end
+		table.insert(self._instances[i], { x, y, qx / tw, qy / th, qw, qh, i + base_layer, r, g, b, a })
+		self._count = self._count + 1
 	end
 end
 
@@ -134,17 +146,21 @@ end
 ---@overload fun(self, x: number, y: number, r: number?, sx: number?, sy: number?, ox: number?, oy: number?, kx: number?, ky: number?)
 ---@overload fun(self, transform: love.Transform)
 function zprite:draw(...)
-	love.graphics.setDepthMode("less", true)
-
 	love.graphics.setShader(ZPRITE_SHADER)
 	ZPRITE_SHADER:send("HeightScale", self._height_scale)
 
 	if self._changed then
-		self._instance_mesh:setVertices(self._instances)
+		local current = 1
+		for i = 1, self._top_layer do
+			if self._instances[i] then
+				self._instance_buffer:setArrayData(self._instances[i], 1, current, #self._instances[i])
+				current = current + #self._instances[i]
+			end
+		end
 		self._changed = false
 	end
 
-	love.graphics.drawInstanced(self._mesh, #self._instances, ...)
+	love.graphics.drawInstanced(self._mesh, self._count, ...)
 end
 
 return zprite