Mojoshader DX bytecode parser fix for SM3.0 vertex textures

mojoshader-vertex-textures.diff

# HG changeset patch
# User Aras Pranckevicius <aras@unity3d.com>
# Date 1406058338 -10800
#      Tue Jul 22 22:45:38 2014 +0300
# Branch graphics/hlsl-compiler-for-dx9
# Node ID bb1b3cb72364bf306984ae7ace82db713f301f43
# Parent  0d5e0c00b1dd7313f17c2d6698802dfb150a2d85
[shaders] Mojoshader, fixed lack of support for SM3.0 vertex textures.
I've no idea what I'm doing, so just copied code from pixel shader parts.
Makes unity shader compiler tests pass.

diff --git a/External/shaderlab/CGBatch/External/mojoshader/mojoshader.cpp b/External/shaderlab/CGBatch/External/mojoshader/mojoshader.cpp
--- a/External/shaderlab/CGBatch/External/mojoshader/mojoshader.cpp
+++ b/External/shaderlab/CGBatch/External/mojoshader/mojoshader.cpp
@@ -6855,7 +6855,39 @@
             ctx->dwords[0] = usage;
             ctx->dwords[1] = index;
         } // if
-        else
+		else if (regtype == REG_TYPE_TEXTURE)
+		{
+			const uint32 usage = (token & 0xF);
+			const uint32 index = ((token >> 16) & 0xF);
+			if (usage == MOJOSHADER_USAGE_TEXCOORD)
+			{
+				if (index > 7)
+					fail(ctx, "DCL texcoord usage must have 0-7 index");
+			} // if
+			else if (usage == MOJOSHADER_USAGE_COLOR)
+			{
+				if (index != 0)
+					fail(ctx, "DCL color usage must have 0 index");
+			} // else if
+			else
+			{
+				fail(ctx, "Invalid DCL texture usage");
+			} // else
+			
+			reserved_mask = 0x7FF0FFE0;
+			ctx->dwords[0] = usage;
+			ctx->dwords[1] = index;
+		} // else if
+		
+		else if (regtype == REG_TYPE_SAMPLER)
+		{
+			const uint32 ttype = ((token >> 27) & 0xF);
+			if (!valid_texture_type(ttype))
+				fail(ctx, "unknown sampler texture type");
+			reserved_mask = 0x7FFFFFF;
+			ctx->dwords[0] = ttype;
+		} // else if
+		else
         {
             unsupported = 1;
         } // else
@@ -7098,14 +7130,19 @@
 
     else if (shader_is_vertex(ctx))
     {
-        const MOJOSHADER_usage usage = (const MOJOSHADER_usage) ctx->dwords[0];
-        const int index = ctx->dwords[1];
-        if (usage >= MOJOSHADER_USAGE_TOTAL)
-        {
-            fail(ctx, "unknown DCL usage");
-            return;
-        } // if
-        add_attribute_register(ctx, regtype, regnum, usage, index, wmask, mods);
+		if (regtype == REG_TYPE_SAMPLER)
+			add_sampler(ctx, regnum, (TextureType) ctx->dwords[0], 0);
+		else
+		{
+			const MOJOSHADER_usage usage = (const MOJOSHADER_usage) ctx->dwords[0];
+			const int index = ctx->dwords[1];
+			if (usage >= MOJOSHADER_USAGE_TOTAL)
+			{
+				fail(ctx, "unknown DCL usage");
+				return;
+			} // if
+			add_attribute_register(ctx, regtype, regnum, usage, index, wmask, mods);
+		}
     } // if
 
     else if (shader_is_pixel(ctx))