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LightingShaderGen: Improve code flexibility.

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This commit is contained in:
NeoBrainX 2013-04-10 13:38:31 +02:00
parent 31d2cab8d3
commit fab4f1d0a5
1 changed files with 48 additions and 15 deletions
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63
Source/Core/VideoCommon/Src/LightingShaderGen.h
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@ -22,6 +22,41 @@
#include "NativeVertexFormat.h" #include "NativeVertexFormat.h"
#include "XFMemory.h" #include "XFMemory.h"
static const char* LightCol(const char* lightsName, unsigned int index, const char* swizzle)
{
static char result[16];
snprintf(result, sizeof(result), "%s[%d].col.%s", lightsName, index, swizzle);
return result;
}
static const char* LightCosAtt(const char* lightsName, unsigned int index)
{
static char result[16];
snprintf(result, sizeof(result), "%s[%d].cosatt", lightsName, index);
return result;
}
static const char* LightDistAtt(const char* lightsName, unsigned int index)
{
static char result[16];
snprintf(result, sizeof(result), "%s[%d].distatt", lightsName, index);
return result;
}
static const char* LightPos(const char* lightsName, unsigned int index)
{
static char result[16];
snprintf(result, sizeof(result), "%s[%d].pos", lightsName, index);
return result;
}
static const char* LightDir(const char* lightsName, unsigned int index)
{
static char result[16];
snprintf(result, sizeof(result), "%s[%d].dir", lightsName, index);
return result;
}
template<class T> template<class T>
static void GenerateLightShader(T& object, LightingUidData& uid_data, int index, int litchan_index, const char* lightsName, int coloralpha) static void GenerateLightShader(T& object, LightingUidData& uid_data, int index, int litchan_index, const char* lightsName, int coloralpha)
{ {
@ -36,13 +71,13 @@ static void GenerateLightShader(T& object, LightingUidData& uid_data, int index,
// atten disabled // atten disabled
switch (chan.diffusefunc) { switch (chan.diffusefunc) {
case LIGHTDIF_NONE: case LIGHTDIF_NONE:
object.Write("lacc.%s += %s[%d].col.%s;\n", swizzle, lightsName, index, swizzle); object.Write("lacc.%s += %s;\n", swizzle, LightCol(lightsName, index, swizzle));
break; break;
case LIGHTDIF_SIGN: case LIGHTDIF_SIGN:
case LIGHTDIF_CLAMP: case LIGHTDIF_CLAMP:
object.Write("ldir = normalize(%s[%d].pos.xyz - pos.xyz);\n", lightsName, index); object.Write("ldir = normalize(%s.xyz - pos.xyz);\n", LightPos(lightsName, index));
object.Write("lacc.%s += %sdot(ldir, _norm0)) * %s[%d].col.%s;\n", object.Write("lacc.%s += %sdot(ldir, _norm0)) * %s;\n",
swizzle, chan.diffusefunc != LIGHTDIF_SIGN ? "max(0.0f," :"(", lightsName, index, swizzle); swizzle, chan.diffusefunc != LIGHTDIF_SIGN ? "max(0.0f," :"(", LightCol(lightsName, index, swizzle));
break; break;
default: _assert_(0); default: _assert_(0);
} }
@ -51,33 +86,31 @@ static void GenerateLightShader(T& object, LightingUidData& uid_data, int index,
if (chan.attnfunc == 3) if (chan.attnfunc == 3)
{ // spot { // spot
object.Write("ldir = %s[%d].pos.xyz - pos.xyz;\n", lightsName, index); object.Write("ldir = %s.xyz - pos.xyz;\n", LightPos(lightsName, index));
object.Write("dist2 = dot(ldir, ldir);\n" object.Write("dist2 = dot(ldir, ldir);\n"
"dist = sqrt(dist2);\n" "dist = sqrt(dist2);\n"
"ldir = ldir / dist;\n" "ldir = ldir / dist;\n"
"attn = max(0.0f, dot(ldir, %s[%d].dir.xyz));\n", lightsName, index); "attn = max(0.0f, dot(ldir, %s.xyz));\n", LightDir(lightsName, index));
object.Write("attn = max(0.0f, dot(%s[%d].cosatt.xyz, float3(1.0f, attn, attn*attn))) / dot(%s[%d].distatt.xyz, float3(1.0f,dist,dist2));\n", lightsName, index, lightsName, index); object.Write("attn = max(0.0f, dot(%s.xyz, float3(1.0f, attn, attn*attn))) / dot(%s.xyz, float3(1.0f,dist,dist2));\n", LightCosAtt(lightsName, index), LightDistAtt(lightsName, index));
} }
else if (chan.attnfunc == 1) else if (chan.attnfunc == 1)
{ // specular { // specular
object.Write("ldir = normalize(%s[%d].pos.xyz);\n", lightsName, index); object.Write("ldir = normalize(%s.xyz);\n", LightPos(lightsName, index));
object.Write("attn = (dot(_norm0,ldir) >= 0.0f) ? max(0.0f, dot(_norm0, %s[%d].dir.xyz)) : 0.0f;\n", lightsName, index); object.Write("attn = (dot(_norm0,ldir) >= 0.0f) ? max(0.0f, dot(_norm0, %s.xyz)) : 0.0f;\n", LightDir(lightsName, index));
object.Write("attn = max(0.0f, dot(%s[%d].cosatt.xyz, float3(1,attn,attn*attn))) / dot(%s[%d].distatt.xyz, float3(1,attn,attn*attn));\n", lightsName, index, lightsName, index); object.Write("attn = max(0.0f, dot(%s.xyz, float3(1,attn,attn*attn))) / dot(%s.xyz, float3(1,attn,attn*attn));\n", LightCosAtt(lightsName, index), LightDistAtt(lightsName, index));
} }
switch (chan.diffusefunc) switch (chan.diffusefunc)
{ {
case LIGHTDIF_NONE: case LIGHTDIF_NONE:
object.Write("lacc.%s += attn * %s[%d].col.%s;\n", swizzle, lightsName, index, swizzle); object.Write("lacc.%s += attn * %s;\n", swizzle, LightCol(lightsName, index, swizzle));
break; break;
case LIGHTDIF_SIGN: case LIGHTDIF_SIGN:
case LIGHTDIF_CLAMP: case LIGHTDIF_CLAMP:
object.Write("lacc.%s += attn * %sdot(ldir, _norm0)) * %s[%d].col.%s;\n", object.Write("lacc.%s += attn * %sdot(ldir, _norm0)) * %s;\n",
swizzle, swizzle,
chan.diffusefunc != LIGHTDIF_SIGN ? "max(0.0f," :"(", chan.diffusefunc != LIGHTDIF_SIGN ? "max(0.0f," :"(",
lightsName, LightCol(lightsName, index, swizzle));
index,
swizzle);
break; break;
default: _assert_(0); default: _assert_(0);
} }