Video_Software: Implement texture preloading

Source/Plugins/Plugin_VideoSoftware/Src/BPMemLoader.cpp

@@ -112,6 +112,24 @@ void SWBPWritten(int address, int newvalue)
 			break;
         }
 
+	case BPMEM_PRELOAD_MODE:
+		if (newvalue != 0)
+		{
+			// NOTE(neobrain): Apparently tmemodd doesn't affect hardware behavior at all (libogc uses it just as a buffe$
+			BPS_TmemConfig& tmem_cfg = bpmem.tmem_config;
+			u8* ram_ptr = Memory::GetPointer(tmem_cfg.preload_addr << 5);
+			u32 tmem_addr = tmem_cfg.preload_tmem_even * TMEM_LINE_SIZE;
+			u32 size = tmem_cfg.preload_tile_info.count * 32;
+
+			// Check if the game has overflowed TMEM, and copy up to the limit.
+			// Paper Mario does this when entering the Great Boogly Tree (Chap 2)
+			if ((tmem_addr + size) > TMEM_SIZE)
+				size = TMEM_SIZE - tmem_addr;
+
+			memcpy(texMem + tmem_addr, ram_ptr, size);
+		}
+ 		break;
+
     case BPMEM_TEV_REGISTER_L:   // Reg 1
 	case BPMEM_TEV_REGISTER_L+2: // Reg 2
 	case BPMEM_TEV_REGISTER_L+4: // Reg 3

Source/Plugins/Plugin_VideoSoftware/Src/TextureSampler.cpp

@@ -120,8 +120,16 @@ void SampleMip(s32 s, s32 t, s32 mip, bool linear, u8 texmap, u8 *sample)
     TexImage0& ti0 = texUnit.texImage0[subTexmap];
     TexTLUT& texTlut = texUnit.texTlut[subTexmap];
 
-    u32 imageBase = texUnit.texImage3[subTexmap].image_base << 5;    
+	u8 *imageSrc;
-    u8 *imageSrc = Memory::GetPointer(imageBase);
+	if (texUnit.texImage1[subTexmap].image_type)
+	{
+		imageSrc = &texMem[texUnit.texImage1[subTexmap].tmem_even * TMEM_LINE_SIZE];
+	}
+	else
+	{
+		u32 imageBase = texUnit.texImage3[subTexmap].image_base << 5;    
+		imageSrc = Memory::GetPointer(imageBase);
+	}
 
 	int imageWidth = ti0.width;
 	int imageHeight = ti0.height;