d3d: Set the lod bias for textures.

Why aren't these caching?

GPU/Directx9/FramebufferDX9.cpp

@@ -647,12 +647,12 @@ namespace DX9 {
 				if (g_Config.iBufFilter == SCALE_LINEAR) {
 					dxstate.texMagFilter.set(D3DTEXF_LINEAR);
 					dxstate.texMinFilter.set(D3DTEXF_LINEAR);
-					dxstate.texMipFilter.set(D3DTEXF_NONE);
 				} else {
 					dxstate.texMagFilter.set(D3DTEXF_POINT);
 					dxstate.texMinFilter.set(D3DTEXF_POINT);
-					dxstate.texMipFilter.set(D3DTEXF_NONE);
 				}
+				dxstate.texMipFilter.set(D3DTEXF_NONE);
+				dxstate.texMipLodBias.set(0);
 				DrawActiveTexture(colorTexture, x, y, w, h, (float)PSP_CoreParameter().pixelWidth, (float)PSP_CoreParameter().pixelHeight, false, 480.0f / (float)vfb->width, 272.0f / (float)vfb->height);
 			}
 			/* 

GPU/Directx9/TextureCacheDX9.cpp

@@ -491,15 +491,13 @@ void TextureCacheDX9::UpdateSamplingParams(TexCacheEntry &entry, bool force) {
 
 	bool noMip = (gstate.texlevel & 0xFFFFFF) == 0x000001 || (gstate.texlevel & 0xFFFFFF) == 0x100001 ;  // Fix texlevel at 0
 
+	float lodBias = 0.0;
 	if (entry.maxLevel == 0) {
 		// Enforce no mip filtering, for safety.
 		minFilt &= 1; // no mipmaps yet
 	} else {
-		// TODO: Is this a signed value? Which direction?
+		// Texture lod bias should be signed.
-		float lodBias = 0.0; // -(float)((gstate.texlevel >> 16) & 0xFF) / 16.0f;
+		lodBias = (float)(int)(s8)((gstate.texlevel >> 16) & 0xFF) / 16.0f;
-		if (force || entry.lodBias != lodBias) {
-			entry.lodBias = lodBias;
-		}
 	}
 
 	if ((g_Config.iTexFiltering == LINEAR || (g_Config.iTexFiltering == LINEARFMV && g_iNumVideos)) && !gstate.isColorTestEnabled()) {
@@ -519,6 +517,7 @@ void TextureCacheDX9::UpdateSamplingParams(TexCacheEntry &entry, bool force) {
 
 	dxstate.texMinFilter.set(MinFilt[minFilt]);
 	dxstate.texMipFilter.set(MipFilt[minFilt]);
+	dxstate.texMipLodBias.set(lodBias);
 	dxstate.texMagFilter.set(MagFilt[magFilt]);
 	dxstate.texAddressU.set(sClamp ? D3DTADDRESS_CLAMP : D3DTADDRESS_WRAP);
 	dxstate.texAddressV.set(tClamp ? D3DTADDRESS_CLAMP : D3DTADDRESS_WRAP);
@@ -939,7 +938,6 @@ void TextureCacheDX9::SetTexture(bool force) {
 	entry->lastFrame = gpuStats.numFlips;
 	entry->framebuffer = 0;
 	entry->maxLevel = maxLevel;
-	entry->lodBias = 0.0f;
 	
 	entry->dim = gstate.getTextureDimension(0);
 	entry->bufw = bufw;

GPU/Directx9/TextureCacheDX9.h

@@ -104,7 +104,6 @@ private:
 		u32 fullhash;
 		u32 cluthash;
 		int maxLevel;
-		float lodBias;
 
 		bool Matches(u16 dim2, u8 format2, int maxLevel2);
 		void ReleaseTexture() {

GPU/Directx9/helper/dx_state.cpp

@@ -54,6 +54,7 @@ void DirectxState::Restore() {
 	texMinFilter.restore(); count++;
 	texMagFilter.restore(); count++;
 	texMipFilter.restore(); count++;
+	texMipLodBias.restore(); count++;
 	texAddressU.restore(); count++;
 	texAddressV.restore(); count++;
 

GPU/Directx9/helper/dx_state.h

@@ -73,6 +73,28 @@ private:
 		}
 	};
 
+	// Can't have FLOAT template parameters...
+	template<D3DSAMPLERSTATETYPE state1, DWORD p1def>
+	class DxSampler0State1Float {
+		D3DSAMPLERSTATETYPE _state1;
+		union {
+			FLOAT p1;
+			DWORD p1d;
+		};
+	public:
+		DxSampler0State1Float() : _state1(state1), p1d(p1def) {
+			DirectxState::state_count++;
+		}
+
+		inline void set(FLOAT newp1) {
+			p1 = newp1;
+			pD3Ddevice->SetSamplerState(0, _state1, p1d);
+		}
+		void restore() {
+			pD3Ddevice->SetSamplerState(0, _state1, p1d);
+		}
+	};
+
 	template<D3DRENDERSTATETYPE state1, DWORD p1def, D3DRENDERSTATETYPE state2, DWORD p2def>
 	class DxState2 {
 		D3DRENDERSTATETYPE _state1;
@@ -318,6 +340,7 @@ public:
 	DxSampler0State1<D3DSAMP_MINFILTER, D3DTEXF_POINT> texMinFilter;
 	DxSampler0State1<D3DSAMP_MAGFILTER, D3DTEXF_POINT> texMagFilter;
 	DxSampler0State1<D3DSAMP_MIPFILTER, D3DTEXF_NONE> texMipFilter;
+	DxSampler0State1Float<D3DSAMP_MIPMAPLODBIAS, 0> texMipLodBias;
 	DxSampler0State1<D3DSAMP_ADDRESSU, D3DTADDRESS_CLAMP> texAddressU;
 	DxSampler0State1<D3DSAMP_ADDRESSV, D3DTADDRESS_CLAMP> texAddressV;