Reimplemented Renderer2D

- Renderer2D now static
- Renderer now calls Init and Deinit of Renderer2D
- Renderer2D  now calls Init and Deinit of FontRenderer
- Fixed Deinit order of Layers and renderer (e.g. Layers now deinit first)
- Sandbox2D now uses SandboxApp (only loads different layer)

Sandbox/content/Shaders/msdfShader.hlsl

@@ -3,30 +3,33 @@ SamplerState Sampler : register(s0);
 
 cbuffer Constants
 {
+    float4x4 ViewProjection;
+    float2 UnitRange;
     float screenPixelRange = 2;
 }
 
 struct VS_Input
 {
     float2 Position    : POSITION;
+    float2 Texcoord    : TEXCOORD0;
     float4x4 Tranform  : TRANSFORM;
     float4 Color       : COLOR;
-    float4 UVTransform : TEXCOORD;
+    float4 UVTransform : TEXCOORD1;
 };
 
 struct PS_Input
 {
     float4 Position : SV_Position;
     float2 TexCoord : TEXCOORD0;
-    float4 Color : COLOR;
+    float4 Color    : COLOR;
 };
 
 PS_Input VS(VS_Input input)
 {
     PS_Input output;
 
-    output.Position = mul(float4(input.Position, 0.0f, 1.0f), input.Tranform);
-    output.TexCoord = input.UVTransform.xy + input.UVTransform.zw * input.Position;
+    output.Position = mul(ViewProjection, mul(input.Tranform, float4(input.Position, 0.0f, 1.0f)));
+    output.TexCoord = input.UVTransform.xy + input.UVTransform.zw * input.Texcoord;
     output.Color = input.Color;
 
     return output;
@@ -36,14 +39,17 @@ float median(float r, float g, float b) {
     return max(min(r, g), min(max(r, g), b));
 }
 
+float ScreenPxRange(float2 texcoord) {
+    float2 screenTexSize = 1.0f / fwidth(texcoord);
+    return max(0.5f * dot(UnitRange, screenTexSize), 1.0f);
+}
+
 float4 PS(PS_Input input) : SV_Target0
 {
     float3 msd = Texture.Sample(Sampler, input.TexCoord);
     float sd = median(msd.r, msd.g, msd.b);
-    float screenPxDistance = screenPixelRange * (sd - 0.5);
+    float screenPxDistance = ScreenPxRange(input.TexCoord) * (sd - 0.5);
     float opacity = clamp(screenPxDistance + 0.5, 0.0, 1.0);
-    //float4 color = lerp(float4(1, 0, 0, 1), input.Color, opacity);
-    //return color;
 
     return float4(input.Color.rgb, opacity * input.Color.a);
 }