Initial commit

Basic functionality is complete.

9 files changed, 474 insertions, 0 deletions

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..31a0864
--- /dev/null
+++ b/README.md
@@ -0,0 +1,36 @@
+## DisInfo: a simple information display library for hlsl
+
+This contains HLSL library code to render text based information. This is
+something I struggle with so I thought it would be nice to have a simple
+abstraction.
+
+Core APIs:
+```
+// uv: uv coordinates
+// box_bounds: the left, right, top, and bottom bounds of the box,
+// respectively. Bottom-left is (0,0) and top-right is (1, 1).
+// res: the number of columns (width) and rows (height) in the box.
+// pos [OUT]: the x, y coordinates of the box.
+// box_uv [OUT]: the location we're rendering at, expressed in the box's UV
+//     coordinates.
+// Returns true iff the UV is pointing within box_bounds.
+bool getBoxLoc(float2 uv, float4 box_bounds, int2 res, out int2 pos, out float2 box_uv);
+
+// c: char to render
+// pos: x,y coordinates of slot to render in
+// res: the resolution of the box.
+// box_uv: the UV coordinates of the box we're rendering at, on [0, 1].
+float4 renderInBox(char c, int2 pos, int2 res, float2 box_uv);
+
+// Remap a UV onto a smaller domain.
+bool remapUVSmaller(float2 uv, float4 bounds, out float2 uvr);
+
+// Remaps a UV onto a larger domain.
+bool remapUVBigger(float2 uv, float4 bounds, out float2 uvr);
+```
+
+### TODO
+
+1. Line wrapping + "string" interface. Strings could be a vector of chars.
+   Maybe use macros to make them look more like strings.
+
diff --git a/disinfo.cginc b/disinfo.cginc
new file mode 100644
index 0000000..1567e9d
--- /dev/null
+++ b/disinfo.cginc
@@ -0,0 +1,101 @@
+#ifndef __DISINFO_INC
+#define __DISINFO_INC
+
+/*
+ * A small font rendering library.
+ *
+ * Sample usage:
+ *
+ * fixed4 frag(v2f i) : SV_Target
+ * {
+ *   float2 uv = i.uv;
+ *   int2 cell_pos;
+ *   float2 cell_uv;
+ *   float2 res = int2(4, 4);
+ *   if (!getBoxLoc(uv, 0.1, 0.9, res, cell_pos, cell_uv)) {
+ *     return float4(0, 0, 0, 1);
+ *   }
+ *   float2 duv = float2(ddx(i.uv.x), ddy(i.uv.y)) / 4;
+ *   float4 font_color = renderInBox(67, cell_uv, duv);
+ * 
+ *   return font_color;
+ * }
+ */
+
+// `_Font` should be an 8x16 (8 rows, 16 columns) grid of monospace ASCII
+// glyphs.
+Texture2D _Font;
+float4 _Font_TexelSize;
+SamplerState linear_clamp_sampler;
+
+// Returns false if `uv` does not fall within `bounds`.
+bool remapUVSmaller(float2 uv, float2 bottom_left, float2 top_right,
+    out float2 uvr) {
+  if (!(uv.x > bottom_left.x && uv.x < top_right.x &&
+      uv.y > bottom_left.y && uv.y < top_right.y)) {
+    return false;
+  }
+
+  uvr = uv - bottom_left;
+  uvr = uvr / (top_right - bottom_left);
+
+  return true;
+}
+
+// bounds: the left/right/top/bottom bounds of the inner UV region,
+//     respectively.
+// Always returns true.
+bool remapUVBigger(float2 uv, float2 bottom_left, float2 top_right,
+    out float2 uvr) {
+  uvr = uv * (top_right - bottom_left) + bottom_left;
+
+  return true;
+}
+
+bool getBoxLoc(float2 uv, float2 bottom_left, float2 top_right,
+    int2 res, out int2 cell_pos, out float2 cell_uv)
+{
+  float2 box_uv;
+  if (!remapUVSmaller(uv, bottom_left, top_right, box_uv)) {
+    return false;
+  }
+
+  // The integer index of the cell pointed to by `uv`, on the interval
+  // [0, res.x - 1] * [0, res.y - 1]
+  cell_pos = fmod(floor(box_uv * res), res);
+
+  float2 box_sz = 1.0 / float2(res);
+  float2 cell_bot_left = cell_pos * box_sz;
+  float2 cell_top_right = (cell_pos + 1) * box_sz;
+  if (!remapUVSmaller(box_uv, cell_bot_left, cell_top_right, cell_uv)) {
+    // This should never happen Clueless
+    return false;
+  }
+
+  return true;
+}
+
+// `c` is a character encoded as ASCII.
+// `duv` is float2(ddx(i.uv.x), ddy(i.uv.y)), where `i.uv` is the UV of the
+//    object we're rendering on.
+float4 renderInBox(int c, float2 cell_uv, float2 duv)
+{
+  int2 bitmap_res = int2(16, 8);
+  int letter_idx = c;
+  int2 letter_pos = int2(
+      bitmap_res.x - (letter_idx % bitmap_res.x),
+      letter_idx / bitmap_res.x);
+  letter_pos.x = bitmap_res.x - letter_pos.x;
+  letter_pos.y = (bitmap_res.y - 1) - letter_pos.y;
+  float2 letter_box_sz = 1.0 / float2(bitmap_res);
+  float2 letter_bot_left = letter_pos * letter_box_sz;
+  float2 letter_top_right = (letter_pos + 1) * letter_box_sz;
+  float2 letter_uv;
+  remapUVBigger(cell_uv, letter_bot_left, letter_top_right, letter_uv);
+
+  float4 font_color = _Font.SampleGrad(linear_clamp_sampler, letter_uv, duv.x, duv.y);
+  return font_color;
+}
+
+#endif  // __DISINFO_INC
+
diff --git a/disinfo.mat b/disinfo.mat
new file mode 100644
index 0000000..af1cb4f
--- /dev/null
+++ b/disinfo.mat
@@ -0,0 +1,81 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!21 &2100000
+Material:
+  serializedVersion: 6
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_Name: disinfo
+  m_Shader: {fileID: 4800000, guid: 367d6c0dd4711124e8e20975949a2306, type: 3}
+  m_ShaderKeywords: 
+  m_LightmapFlags: 4
+  m_EnableInstancingVariants: 0
+  m_DoubleSidedGI: 0
+  m_CustomRenderQueue: -1
+  stringTagMap: {}
+  disabledShaderPasses: []
+  m_SavedProperties:
+    serializedVersion: 3
+    m_TexEnvs:
+    - _BumpMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _DetailAlbedoMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _DetailMask:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _DetailNormalMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _EmissionMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _Font:
+        m_Texture: {fileID: 2800000, guid: c257699adf45b4e48a6c0daf1c143fde, type: 3}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _MainTex:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _MetallicGlossMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _OcclusionMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _ParallaxMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    m_Floats:
+    - _BumpScale: 1
+    - _Cutoff: 0.5
+    - _DetailNormalMapScale: 1
+    - _DstBlend: 0
+    - _GlossMapScale: 1
+    - _Glossiness: 0.5
+    - _GlossyReflections: 1
+    - _Metallic: 0
+    - _Mode: 0
+    - _OcclusionStrength: 1
+    - _Parallax: 0.02
+    - _SmoothnessTextureChannel: 0
+    - _SpecularHighlights: 1
+    - _SrcBlend: 1
+    - _UVSec: 0
+    - _ZWrite: 1
+    m_Colors:
+    - _Color: {r: 1, g: 1, b: 1, a: 1}
+    - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}
diff --git a/disinfo.shader b/disinfo.shader
new file mode 100644
index 0000000..74b8e5f
--- /dev/null
+++ b/disinfo.shader
@@ -0,0 +1,55 @@
+Shader "yum_food/disinfo"
+{
+  Properties
+  {
+    _Font("Font", 2D) = "black" {}
+  }
+  SubShader
+  {
+    Pass {
+      Tags {
+        "RenderType"="Opaque"
+        "Queue"="AlphaTest+499"
+        "LightMode" = "ForwardBase"
+      }
+      Blend SrcAlpha OneMinusSrcAlpha
+      Cull Back
+      ZTest LEqual
+
+      CGPROGRAM
+      #pragma target 5.0
+
+      #pragma multi_compile _ VERTEXLIGHT_ON
+
+      #pragma vertex vert
+      #pragma fragment frag
+
+      #define FORWARD_BASE_PASS
+
+      #include "disinfo_lighting.cginc"
+      ENDCG
+    }
+    Pass {
+      Tags {
+        "RenderType" = "Opaque"
+        "LightMode" = "ForwardAdd"
+        "Queue"="AlphaTest+499"
+      }
+      Blend One One
+      Cull Back
+      ZTest LEqual
+
+      CGPROGRAM
+      #pragma target 5.0
+
+      #pragma multi_compile_fwdadd
+
+      #pragma vertex vert
+      #pragma fragment frag
+
+      #include "disinfo_lighting.cginc"
+      ENDCG
+    }
+  }
+  //CustomEditor "TaSTTShaderGUI"
+}
diff --git a/disinfo.shader.meta b/disinfo.shader.meta
new file mode 100644
index 0000000..70cfbcc
--- /dev/null
+++ b/disinfo.shader.meta
@@ -0,0 +1,9 @@
+fileFormatVersion: 2
+guid: 367d6c0dd4711124e8e20975949a2306
+ShaderImporter:
+  externalObjects: {}
+  defaultTextures: []
+  nonModifiableTextures: []
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/disinfo_lighting.cginc b/disinfo_lighting.cginc
new file mode 100644
index 0000000..94fc667
--- /dev/null
+++ b/disinfo_lighting.cginc
@@ -0,0 +1,52 @@
+#ifndef DISINFO_LIGHTING
+#define DISINFO_LIGHTING
+
+#include "AutoLight.cginc"
+#include "UnityPBSLighting.cginc"
+
+#include "interpolators.cginc"
+#include "disinfo.cginc"
+
+void getVertexLightColor(inout v2f i)
+{
+  #if defined(VERTEXLIGHT_ON)
+  i.vertexLightColor = Shade4PointLights(
+    unity_4LightPosX0, unity_4LightPosY0, unity_4LightPosZ0,
+    unity_LightColor[0].rgb,
+    unity_LightColor[1].rgb,
+    unity_LightColor[2].rgb,
+    unity_LightColor[3].rgb,
+    unity_4LightAtten0, i.worldPos, i.normal
+  );
+  #endif
+}
+
+v2f vert(appdata v)
+{
+  v2f o;
+  o.position = UnityObjectToClipPos(v.position);
+  o.worldPos = mul(unity_ObjectToWorld, v.position);
+  o.normal = UnityObjectToWorldNormal(v.normal);
+
+  o.uv = v.uv;
+  getVertexLightColor(o);
+
+  return o;
+}
+
+fixed4 frag(v2f i) : SV_Target
+{
+  float2 uv = i.uv;
+  int2 cell_pos;
+  float2 cell_uv;
+  if (!getBoxLoc(uv, 0.1, 0.9, /*res=*/int2(4,4), cell_pos, cell_uv)) {
+    return float4(0, 0, 0, 1);
+  }
+  float2 duv = float2(ddx(i.uv.x), ddy(i.uv.y)) / 4;
+  float4 font_color = renderInBox(67, cell_uv, duv);
+
+  return font_color;
+}
+
+#endif  // DISINFO_LIGHTING
+
diff --git a/font-ascii.png b/font-ascii.png
new file mode 100644
index 0000000..1a8ba99
--- /dev/null
+++ b/font-ascii.png
diff --git a/font-ascii.png.meta b/font-ascii.png.meta
new file mode 100644
index 0000000..4effb9f
--- /dev/null
+++ b/font-ascii.png.meta
@@ -0,0 +1,116 @@
+fileFormatVersion: 2
+guid: c257699adf45b4e48a6c0daf1c143fde
+TextureImporter:
+  internalIDToNameTable: []
+  externalObjects: {}
+  serializedVersion: 11
+  mipmaps:
+    mipMapMode: 0
+    enableMipMap: 1
+    sRGBTexture: 1
+    linearTexture: 0
+    fadeOut: 0
+    borderMipMap: 0
+    mipMapsPreserveCoverage: 0
+    alphaTestReferenceValue: 0.5
+    mipMapFadeDistanceStart: 1
+    mipMapFadeDistanceEnd: 3
+  bumpmap:
+    convertToNormalMap: 0
+    externalNormalMap: 0
+    heightScale: 0.25
+    normalMapFilter: 0
+  isReadable: 0
+  streamingMipmaps: 0
+  streamingMipmapsPriority: 0
+  grayScaleToAlpha: 0
+  generateCubemap: 6
+  cubemapConvolution: 0
+  seamlessCubemap: 0
+  textureFormat: 1
+  maxTextureSize: 2048
+  textureSettings:
+    serializedVersion: 2
+    filterMode: 1
+    aniso: 1
+    mipBias: 0
+    wrapU: 2
+    wrapV: 2
+    wrapW: 2
+  nPOTScale: 1
+  lightmap: 0
+  compressionQuality: 50
+  spriteMode: 0
+  spriteExtrude: 1
+  spriteMeshType: 1
+  alignment: 0
+  spritePivot: {x: 0.5, y: 0.5}
+  spritePixelsToUnits: 100
+  spriteBorder: {x: 0, y: 0, z: 0, w: 0}
+  spriteGenerateFallbackPhysicsShape: 1
+  alphaUsage: 1
+  alphaIsTransparency: 0
+  spriteTessellationDetail: -1
+  textureType: 0
+  textureShape: 1
+  singleChannelComponent: 0
+  maxTextureSizeSet: 0
+  compressionQualitySet: 0
+  textureFormatSet: 0
+  applyGammaDecoding: 0
+  platformSettings:
+  - serializedVersion: 3
+    buildTarget: DefaultTexturePlatform
+    maxTextureSize: 2048
+    resizeAlgorithm: 0
+    textureFormat: -1
+    textureCompression: 2
+    compressionQuality: 50
+    crunchedCompression: 0
+    allowsAlphaSplitting: 0
+    overridden: 0
+    androidETC2FallbackOverride: 0
+    forceMaximumCompressionQuality_BC6H_BC7: 0
+  - serializedVersion: 3
+    buildTarget: Standalone
+    maxTextureSize: 2048
+    resizeAlgorithm: 0
+    textureFormat: -1
+    textureCompression: 2
+    compressionQuality: 50
+    crunchedCompression: 0
+    allowsAlphaSplitting: 0
+    overridden: 0
+    androidETC2FallbackOverride: 0
+    forceMaximumCompressionQuality_BC6H_BC7: 0
+  - serializedVersion: 3
+    buildTarget: Android
+    maxTextureSize: 2048
+    resizeAlgorithm: 0
+    textureFormat: -1
+    textureCompression: 2
+    compressionQuality: 50
+    crunchedCompression: 0
+    allowsAlphaSplitting: 0
+    overridden: 0
+    androidETC2FallbackOverride: 0
+    forceMaximumCompressionQuality_BC6H_BC7: 0
+  spriteSheet:
+    serializedVersion: 2
+    sprites: []
+    outline: []
+    physicsShape: []
+    bones: []
+    spriteID: 
+    internalID: 0
+    vertices: []
+    indices: 
+    edges: []
+    weights: []
+    secondaryTextures: []
+  spritePackingTag: 
+  pSDRemoveMatte: 0
+  pSDShowRemoveMatteOption: 0
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/interpolators.cginc b/interpolators.cginc
new file mode 100644
index 0000000..3f278a7
--- /dev/null
+++ b/interpolators.cginc
@@ -0,0 +1,24 @@
+#ifndef __INTERPOLATORS_INC__
+#define __INTERPOLATORS_INC__
+
+struct appdata
+{
+  float4 position : POSITION;
+  float2 uv : TEXCOORD0;
+  float3 normal : NORMAL;
+};
+
+struct v2f
+{
+  float4 position : SV_POSITION;
+  float2 uv : TEXCOORD0;
+  float3 normal : TEXCOORD1;
+  float4 worldPos : TEXCOORD2;
+
+  #if defined(VERTEXLIGHT_ON)
+  float3 vertexLightColor : TEXCOORD3;
+  #endif
+};
+
+#endif  // __INTERPOLATORS_INC__
+