Assignment for RMIT Mixed Reality in 2020
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  1. // Simplified SDF shader:
  2. // - No Shading Option (bevel / bump / env map)
  3. // - No Glow Option
  4. // - Softness is applied on both side of the outline
  5. Shader "TextMeshPro/Mobile/Distance Field Backcull" {
  6. Properties {
  7. _FaceColor ("Face Color", Color) = (1,1,1,1)
  8. _FaceDilate ("Face Dilate", Range(-1,1)) = 0
  9. _OutlineColor ("Outline Color", Color) = (0,0,0,1)
  10. _OutlineWidth ("Outline Thickness", Range(0,1)) = 0
  11. _OutlineSoftness ("Outline Softness", Range(0,1)) = 0
  12. _UnderlayColor ("Border Color", Color) = (0,0,0,.5)
  13. _UnderlayOffsetX ("Border OffsetX", Range(-1,1)) = 0
  14. _UnderlayOffsetY ("Border OffsetY", Range(-1,1)) = 0
  15. _UnderlayDilate ("Border Dilate", Range(-1,1)) = 0
  16. _UnderlaySoftness ("Border Softness", Range(0,1)) = 0
  17. _WeightNormal ("Weight Normal", float) = 0
  18. _WeightBold ("Weight Bold", float) = .5
  19. _ShaderFlags ("Flags", float) = 0
  20. _ScaleRatioA ("Scale RatioA", float) = 1
  21. _ScaleRatioB ("Scale RatioB", float) = 1
  22. _ScaleRatioC ("Scale RatioC", float) = 1
  23. _MainTex ("Font Atlas", 2D) = "white" {}
  24. _TextureWidth ("Texture Width", float) = 512
  25. _TextureHeight ("Texture Height", float) = 512
  26. _GradientScale ("Gradient Scale", float) = 5
  27. _ScaleX ("Scale X", float) = 1
  28. _ScaleY ("Scale Y", float) = 1
  29. _PerspectiveFilter ("Perspective Correction", Range(0, 1)) = 0.875
  30. _Sharpness ("Sharpness", Range(-1,1)) = 0
  31. _VertexOffsetX ("Vertex OffsetX", float) = 0
  32. _VertexOffsetY ("Vertex OffsetY", float) = 0
  33. _ClipRect ("Clip Rect", vector) = (-32767, -32767, 32767, 32767)
  34. _MaskSoftnessX ("Mask SoftnessX", float) = 0
  35. _MaskSoftnessY ("Mask SoftnessY", float) = 0
  36. _StencilComp ("Stencil Comparison", Float) = 8
  37. _Stencil ("Stencil ID", Float) = 0
  38. _StencilOp ("Stencil Operation", Float) = 0
  39. _StencilWriteMask ("Stencil Write Mask", Float) = 255
  40. _StencilReadMask ("Stencil Read Mask", Float) = 255
  41. _ColorMask ("Color Mask", Float) = 15
  42. }
  43. SubShader {
  44. Tags
  45. {
  46. "Queue"="Transparent"
  47. "IgnoreProjector"="True"
  48. "RenderType"="Transparent"
  49. }
  50. Stencil
  51. {
  52. Ref [_Stencil]
  53. Comp [_StencilComp]
  54. Pass [_StencilOp]
  55. ReadMask [_StencilReadMask]
  56. WriteMask [_StencilWriteMask]
  57. }
  58. Cull Back
  59. ZWrite Off
  60. Lighting Off
  61. Fog { Mode Off }
  62. ZTest [unity_GUIZTestMode]
  63. Blend One OneMinusSrcAlpha
  64. ColorMask [_ColorMask]
  65. Pass {
  66. CGPROGRAM
  67. #pragma vertex VertShader
  68. #pragma fragment PixShader
  69. #pragma shader_feature __ OUTLINE_ON
  70. #pragma shader_feature __ UNDERLAY_ON UNDERLAY_INNER
  71. #pragma multi_compile __ UNITY_UI_CLIP_RECT
  72. #pragma multi_compile __ UNITY_UI_ALPHACLIP
  73. #include "UnityCG.cginc"
  74. #include "UnityUI.cginc"
  75. #include "TMPro_Properties.cginc"
  76. struct vertex_t {
  77. UNITY_VERTEX_INPUT_INSTANCE_ID
  78. float4 vertex : POSITION;
  79. float3 normal : NORMAL;
  80. fixed4 color : COLOR;
  81. float2 texcoord0 : TEXCOORD0;
  82. float2 texcoord1 : TEXCOORD1;
  83. };
  84. struct pixel_t {
  85. UNITY_VERTEX_INPUT_INSTANCE_ID
  86. UNITY_VERTEX_OUTPUT_STEREO
  87. float4 vertex : SV_POSITION;
  88. fixed4 faceColor : COLOR;
  89. fixed4 outlineColor : COLOR1;
  90. float4 texcoord0 : TEXCOORD0; // Texture UV, Mask UV
  91. half4 param : TEXCOORD1; // Scale(x), BiasIn(y), BiasOut(z), Bias(w)
  92. half4 mask : TEXCOORD2; // Position in clip space(xy), Softness(zw)
  93. #if (UNDERLAY_ON | UNDERLAY_INNER)
  94. float4 texcoord1 : TEXCOORD3; // Texture UV, alpha, reserved
  95. half2 underlayParam : TEXCOORD4; // Scale(x), Bias(y)
  96. #endif
  97. };
  98. pixel_t VertShader(vertex_t input)
  99. {
  100. pixel_t output;
  101. UNITY_INITIALIZE_OUTPUT(pixel_t, output);
  102. UNITY_SETUP_INSTANCE_ID(input);
  103. UNITY_TRANSFER_INSTANCE_ID(input, output);
  104. UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
  105. float bold = step(input.texcoord1.y, 0);
  106. float4 vert = input.vertex;
  107. vert.x += _VertexOffsetX;
  108. vert.y += _VertexOffsetY;
  109. float4 vPosition = UnityObjectToClipPos(vert);
  110. float2 pixelSize = vPosition.w;
  111. pixelSize /= float2(_ScaleX, _ScaleY) * abs(mul((float2x2)UNITY_MATRIX_P, _ScreenParams.xy));
  112. float scale = rsqrt(dot(pixelSize, pixelSize));
  113. scale *= abs(input.texcoord1.y) * _GradientScale * (_Sharpness + 1);
  114. if(UNITY_MATRIX_P[3][3] == 0) scale = lerp(abs(scale) * (1 - _PerspectiveFilter), scale, abs(dot(UnityObjectToWorldNormal(input.normal.xyz), normalize(WorldSpaceViewDir(vert)))));
  115. float weight = lerp(_WeightNormal, _WeightBold, bold) / 4.0;
  116. weight = (weight + _FaceDilate) * _ScaleRatioA * 0.5;
  117. float layerScale = scale;
  118. scale /= 1 + (_OutlineSoftness * _ScaleRatioA * scale);
  119. float bias = (0.5 - weight) * scale - 0.5;
  120. float outline = _OutlineWidth * _ScaleRatioA * 0.5 * scale;
  121. float opacity = input.color.a;
  122. #if (UNDERLAY_ON | UNDERLAY_INNER)
  123. opacity = 1.0;
  124. #endif
  125. fixed4 faceColor = fixed4(input.color.rgb, opacity) * _FaceColor;
  126. faceColor.rgb *= faceColor.a;
  127. fixed4 outlineColor = _OutlineColor;
  128. outlineColor.a *= opacity;
  129. outlineColor.rgb *= outlineColor.a;
  130. outlineColor = lerp(faceColor, outlineColor, sqrt(min(1.0, (outline * 2))));
  131. #if (UNDERLAY_ON | UNDERLAY_INNER)
  132. layerScale /= 1 + ((_UnderlaySoftness * _ScaleRatioC) * layerScale);
  133. float layerBias = (.5 - weight) * layerScale - .5 - ((_UnderlayDilate * _ScaleRatioC) * .5 * layerScale);
  134. float x = -(_UnderlayOffsetX * _ScaleRatioC) * _GradientScale / _TextureWidth;
  135. float y = -(_UnderlayOffsetY * _ScaleRatioC) * _GradientScale / _TextureHeight;
  136. float2 layerOffset = float2(x, y);
  137. #endif
  138. // Generate UV for the Masking Texture
  139. float4 clampedRect = clamp(_ClipRect, -2e10, 2e10);
  140. float2 maskUV = (vert.xy - clampedRect.xy) / (clampedRect.zw - clampedRect.xy);
  141. // Populate structure for pixel shader
  142. output.vertex = vPosition;
  143. output.faceColor = faceColor;
  144. output.outlineColor = outlineColor;
  145. output.texcoord0 = float4(input.texcoord0.x, input.texcoord0.y, maskUV.x, maskUV.y);
  146. output.param = half4(scale, bias - outline, bias + outline, bias);
  147. output.mask = half4(vert.xy * 2 - clampedRect.xy - clampedRect.zw, 0.25 / (0.25 * half2(_MaskSoftnessX, _MaskSoftnessY) + pixelSize.xy));
  148. #if (UNDERLAY_ON || UNDERLAY_INNER)
  149. output.texcoord1 = float4(input.texcoord0 + layerOffset, input.color.a, 0);
  150. output.underlayParam = half2(layerScale, layerBias);
  151. #endif
  152. return output;
  153. }
  154. // PIXEL SHADER
  155. fixed4 PixShader(pixel_t input) : SV_Target
  156. {
  157. UNITY_SETUP_INSTANCE_ID(input);
  158. half d = tex2D(_MainTex, input.texcoord0.xy).a * input.param.x;
  159. half4 c = input.faceColor * saturate(d - input.param.w);
  160. #ifdef OUTLINE_ON
  161. c = lerp(input.outlineColor, input.faceColor, saturate(d - input.param.z));
  162. c *= saturate(d - input.param.y);
  163. #endif
  164. #if UNDERLAY_ON
  165. d = tex2D(_MainTex, input.texcoord1.xy).a * input.underlayParam.x;
  166. c += float4(_UnderlayColor.rgb * _UnderlayColor.a, _UnderlayColor.a) * saturate(d - input.underlayParam.y) * (1 - c.a);
  167. #endif
  168. #if UNDERLAY_INNER
  169. half sd = saturate(d - input.param.z);
  170. d = tex2D(_MainTex, input.texcoord1.xy).a * input.underlayParam.x;
  171. c += float4(_UnderlayColor.rgb * _UnderlayColor.a, _UnderlayColor.a) * (1 - saturate(d - input.underlayParam.y)) * sd * (1 - c.a);
  172. #endif
  173. // Alternative implementation to UnityGet2DClipping with support for softness.
  174. #if UNITY_UI_CLIP_RECT
  175. half2 m = saturate((_ClipRect.zw - _ClipRect.xy - abs(input.mask.xy)) * input.mask.zw);
  176. c *= m.x * m.y;
  177. #endif
  178. #if (UNDERLAY_ON | UNDERLAY_INNER)
  179. c *= input.texcoord1.z;
  180. #endif
  181. #if UNITY_UI_ALPHACLIP
  182. clip(c.a - 0.001);
  183. #endif
  184. return c;
  185. }
  186. ENDCG
  187. }
  188. }
  189. CustomEditor "TMPro.EditorUtilities.TMP_SDFShaderGUI"
  190. }