Replace R32F texture format with R16F (#6784)

Author: EVAST9919

osu.Framework/Graphics/Lines/Path.cs

@@ -315,7 +315,7 @@ protected override bool OnInvalidate(Invalidation invalidation, InvalidationSour
             return result;
         }
 
-        private readonly BufferedDrawNodeSharedData sharedData = new BufferedDrawNodeSharedData(TexturePixelFormat.R32Float, clipToRootNode: true);
+        private readonly BufferedDrawNodeSharedData sharedData = new BufferedDrawNodeSharedData(TexturePixelFormat.R16Float, clipToRootNode: true);
 
         protected override DrawNode CreateDrawNode() => new PathBufferedDrawNode(this, new PathDrawNode(this), sharedData);
 

osu.Framework/Graphics/OpenGL/GLRenderer.cs

@@ -441,8 +441,8 @@ public override IFrameBuffer CreateFrameBuffer(TexturePixelFormat textureFormat
                     glTextureFormat = TextureComponentCount.Rgba8;
                     break;
 
-                case TexturePixelFormat.R32Float:
-                    glTextureFormat = TextureComponentCount.R32f;
+                case TexturePixelFormat.R16Float:
+                    glTextureFormat = TextureComponentCount.R16f;
                     break;
 
                 default:

osu.Framework/Graphics/OpenGL/Textures/GLTexture.cs

@@ -117,9 +117,9 @@ private void setFormat(TextureComponentCount internalFormat)
                     PixelType = PixelType.UnsignedByte;
                     break;
 
-                case TextureComponentCount.R32f:
+                case TextureComponentCount.R16f:
                     PixelFormat = PixelFormat.Red;
-                    PixelType = PixelType.Float;
+                    PixelType = PixelType.HalfFloat;
                     break;
 
                 default:

osu.Framework/Graphics/Rendering/TexturePixelFormat.cs

@@ -6,6 +6,6 @@ namespace osu.Framework.Graphics.Rendering
     public enum TexturePixelFormat
     {
         R8G8B8A8Float,
-        R32Float
+        R16Float
     }
 }

osu.Framework/Graphics/Veldrid/VeldridExtensions.cs

@@ -121,8 +121,8 @@ public static PixelFormat ToPixelFormat(this TexturePixelFormat texturePixelForm
                 case TexturePixelFormat.R8G8B8A8Float:
                     return PixelFormat.R8G8B8A8UNorm;
 
-                case TexturePixelFormat.R32Float:
-                    return PixelFormat.R32Float;
+                case TexturePixelFormat.R16Float:
+                    return PixelFormat.R16Float;
 
                 default:
                     throw new ArgumentException($"Unsupported render buffer format: {texturePixelFormat}", nameof(texturePixelFormat));

osu.Framework/Resources/Shaders/sh_Path.fs

@@ -24,7 +24,7 @@ layout(location = 0) out vec4 o_Colour;
 
 void main(void) 
 {
-    highp float dstFromEdge = texture(sampler2D(m_Texture, m_Sampler), v_TexCoord).r;
+    mediump float dstFromEdge = texture(sampler2D(m_Texture, m_Sampler), v_TexCoord).r;
     lowp vec4 pathCol = texture(sampler2D(m_Texture1, m_Sampler1), TexRect1.xy + vec2(dstFromEdge, 0.0) * TexRect1.zw, -0.9);
     o_Colour = getRoundedColor(vec4(pathCol.rgb, pathCol.a * float(dstFromEdge > 0.0)), v_TexCoord);
 }

osu.Framework/Resources/Shaders/sh_PathPrepass.fs

@@ -9,7 +9,7 @@ layout(location = 1) in highp vec2 v_StartPos;
 layout(location = 2) in highp vec2 v_EndPos;
 layout(location = 3) in highp float v_Radius;
 
-layout(location = 0) out highp float o_Colour;
+layout(location = 0) out mediump float o_Colour;
 
 void main(void) 
 {