From e7ba190845e104d0310156dba80bc0d84fcaa8e5 Mon Sep 17 00:00:00 2001
From: eihrul <eihrul@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Thu, 4 Feb 2010 00:46:03 +0000
Subject: [PATCH] update CG shader for shadowmaportho

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@9927 d7cf8633-e32d-0410-b094-e92efae38249
---
 gl_rmain.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 49 insertions(+), 7 deletions(-)

diff --git a/gl_rmain.c b/gl_rmain.c
index ee268807..2b70cb77 100644
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -1015,9 +1015,12 @@ static const char *builtinshaderstring =
 "}\n"
 "#endif // USEOFFSETMAPPING\n"
 "\n"
-"#if defined(MODE_LIGHTSOURCE) || defined(MODE_DEFERREDLIGHTSOURCE) || defined(USESHADOWMAPORTHO)\n"
+"#if defined(MODE_LIGHTSOURCE) || defined(MODE_DEFERREDLIGHTSOURCE)\n"
 "uniform sampler2D Texture_Attenuation;\n"
 "uniform samplerCube Texture_Cube;\n"
+"#endif\n"
+"\n"
+"#if defined(MODE_LIGHTSOURCE) || defined(MODE_DEFERREDLIGHTSOURCE) || defined(USESHADOWMAPORTHO)\n"
 "\n"
 "#ifdef USESHADOWMAPRECT\n"
 "# ifdef USESHADOWSAMPLER\n"
@@ -2209,9 +2212,12 @@ const char *builtincgshaderstring =
 "}\n"
 "#endif // USEOFFSETMAPPING\n"
 "\n"
-"#if defined(MODE_LIGHTSOURCE) || defined(MODE_DEFERREDLIGHTSOURCE)\n"
+"#if defined(MODE_LIGHTSOURCE) || defined(MODE_DEFERREDLIGHTSOURCE) || defined(USESHADOWMAPORTHO)\n"
 "#if defined(USESHADOWMAPRECT) || defined(USESHADOWMAP2D)\n"
-"# ifdef USESHADOWMAPVSDCT\n"
+"# ifdef USESHADOWMAPORTHO\n"
+"#  define GetShadowMapTC2D(dir, ShadowMap_Parameters) (min(dir, float3(ShadowMap_Parameters.zw, 1.0)))\n"
+"# else\n"
+"#  ifdef USESHADOWMAPVSDCT\n"
 "float3 GetShadowMapTC2D(float3 dir, float4 ShadowMap_Parameters, samplerCUBE Texture_CubeProjection)\n"
 "{\n"
 "   float3 adir = abs(dir);\n"
@@ -2222,7 +2228,7 @@ const char *builtincgshaderstring =
 "   stc.z += ShadowMap_Parameters.z;\n"
 "   return stc;\n"
 "}\n"
-"# else\n"
+"#  else\n"
 "float3 GetShadowMapTC2D(float3 dir, float4 ShadowMap_Parameters)\n"
 "{\n"
 "	float3 adir = abs(dir);\n"
@@ -2265,8 +2271,9 @@ const char *builtincgshaderstring =
 "	stc.z += ShadowMap_Parameters.z;\n"
 "	return stc;\n"
 "}\n"
+"#  endif\n"
 "# endif\n"
-"#endif // defined(USESHADOWMAPRECT) || defined(USESHADOWMAP2D)\n"
+"#endif // defined(USESHADOWMAPRECT) || defined(USESHADOWMAP2D) || defined(USESHADOWMAPORTHO)\n"
 "\n"
 "#ifdef USESHADOWMAPCUBE\n"
 "float4 GetShadowMapTCCube(float3 dir, float4 ShadowMap_Parameters)\n"
@@ -2324,7 +2331,11 @@ const char *builtincgshaderstring =
 "#    endif\n"
 "\n"
 "#  endif\n"
+"#  ifdef USESHADOWMAPORTHO\n"
+"	return lerp(ShadowMap_Parameters.x, ShadowMap_Parameters.y, f);\n"
+"#  else\n"
 "	return f;\n"
+"#  endif\n"
 "}\n"
 "# endif\n"
 "\n"
@@ -2391,7 +2402,11 @@ const char *builtincgshaderstring =
 "    f = step(shadowmaptc.z, tex2D(Texture_ShadowMap2D, shadowmaptc.xy*ShadowMap_TextureScale).r);\n"
 "#    endif\n"
 "#  endif\n"
-"    return f;\n"
+"#  ifdef USESHADOWMAPORTHO\n"
+"	return lerp(ShadowMap_Parameters.x, ShadowMap_Parameters.y, f);\n"
+"#  else\n"
+"	return f;\n"
+"#  endif\n"
 "}\n"
 "# endif\n"
 "\n"
@@ -2703,6 +2718,9 @@ const char *builtincgshaderstring =
 "#ifdef MODE_DEFERREDLIGHTSOURCE\n"
 "uniform float3 LightPosition,\n"
 "#endif\n"
+"#ifdef USESHADOWMAPORTHO\n"
+"uniform float4x4 ShadowMapMatrix,\n"
+"#endif\n"
 "\n"
 "out float4 gl_FrontColor : COLOR,\n"
 "out float4 TexCoordBoth : TEXCOORD0,\n"
@@ -2729,6 +2747,9 @@ const char *builtincgshaderstring =
 "out float3 VectorT : TEXCOORD6, // direction of T texcoord (sometimes crudely called binormal)\n"
 "out float3 VectorR : TEXCOORD7, // direction of R texcoord (surface normal)\n"
 "#endif\n"
+"#ifdef USESHADOWMAPORTHO\n"
+"out float3 ShadowMapTC : TEXCOORD8,\n"
+"#endif\n"
 "out float4 gl_Position : POSITION\n"
 ")\n"
 "{\n"
@@ -2788,6 +2809,10 @@ const char *builtincgshaderstring =
 "	// transform vertex to camera space, using ftransform to match non-VS rendering\n"
 "	gl_Position = mul(ModelViewProjectionMatrix, gl_Vertex);\n"
 "\n"
+"#ifdef USESHADOWMAPORTHO\n"
+"	ShadowMapTC = float3(mul(ShadowMapMatrix, gl_Position));\n"
+"#endif\n"
+"\n"
 "#ifdef USEREFLECTION\n"
 "	ModelViewProjectionPosition = gl_Position;\n"
 "#endif\n"
@@ -2831,6 +2856,9 @@ const char *builtincgshaderstring =
 "float3 VectorT : TEXCOORD6, // direction of T texcoord (sometimes crudely called binormal)\n"
 "float3 VectorR : TEXCOORD7, // direction of R texcoord (surface normal)\n"
 "#endif\n"
+"#ifdef USESHADOWMAPORTHO\n"
+"float3 ShadowMapTC : TEXCOORD8\n"
+"#endif\n"
 "\n"
 "uniform sampler2D Texture_Normal,\n"
 "uniform sampler2D Texture_Color,\n"
@@ -2925,6 +2953,9 @@ const char *builtincgshaderstring =
 "#if defined(MODE_LIGHTSOURCE) || defined(MODE_DEFERREDLIGHTSOURCE)\n"
 "uniform sampler2D Texture_Attenuation,\n"
 "uniform samplerCUBE Texture_Cube,\n"
+"#endif\n"
+"\n"
+"#if defined(MODE_LIGHTSOURCE) || defined(MODE_DEFERREDLIGHTSOURCE) || defined(USESHADOWMAPORTHO)\n"
 "\n"
 "#ifdef USESHADOWMAPRECT\n"
 "# ifdef USESHADOWSAMPLER\n"
@@ -2958,7 +2989,7 @@ const char *builtincgshaderstring =
 "uniform float2 ShadowMap_TextureScale,\n"
 "uniform float4 ShadowMap_Parameters,\n"
 "#endif\n"
-"#endif // !defined(MODE_LIGHTSOURCE) && !defined(MODE_DEFERREDLIGHTSOURCE)\n"
+"#endif // !defined(MODE_LIGHTSOURCE) && !defined(MODE_DEFERREDLIGHTSOURCE) && !defined(USESHADOWMAPORTHO)\n"
 "\n"
 "out float4 gl_FragColor : COLOR\n"
 ")\n"
@@ -3135,6 +3166,17 @@ const char *builtincgshaderstring =
 "# endif\n"
 "#endif\n"
 "\n"
+"#ifdef USESHADOWMAPORTHO\n"
+"	color.rgb *= ShadowMapCompare(ShadowMapTC,\n"
+"# if defined(USESHADOWMAP2D)\n"
+"Texture_ShadowMap2D, ShadowMap_Parameters, ShadowMap_TextureScale\n"
+"# endif\n"
+"# if defined(USESHADOWMAPRECT)\n"
+"Texture_ShadowMapRect, ShadowMap_Parameters\n"
+"# endif\n"
+"	);\n"
+"#endif\n"
+"\n"
 "#ifdef USEDEFERREDLIGHTMAP\n"
 "	float2 ScreenTexCoord = Pixel * PixelToScreenTexCoord;\n"
 "	color.rgb += diffusetex * half3(tex2D(Texture_ScreenDiffuse, ScreenTexCoord)) * DeferredMod_Diffuse;\n"
-- 
2.39.2