Add Buffer:isBufferType and Buffer:isCPUReadable.

src/modules/graphics/vertex.cpp

@@ -337,6 +337,13 @@ const char *getConstant(BuiltinVertexAttribute attrib)
 	return name;
 }
 
+STRINGMAP_BEGIN(BufferType, BUFFERTYPE_MAX_ENUM, bufferTypeName)
+{
+	{ "vertex", BUFFERTYPE_VERTEX },
+	{ "index",  BUFFERTYPE_INDEX  },
+}
+STRINGMAP_END(BufferType, BUFFERTYPE_MAX_ENUM, bufferTypeName)
+
 STRINGMAP_BEGIN(IndexDataType, INDEX_MAX_ENUM, indexType)
 {
 	{ "uint16", INDEX_UINT16 },

src/modules/graphics/vertex.h

@@ -377,6 +377,7 @@ void fillIndices(TriangleIndexMode mode, uint16 vertexStart, uint16 vertexCount,
 void fillIndices(TriangleIndexMode mode, uint32 vertexStart, uint32 vertexCount, uint32 *indices);
 
 STRINGMAP_DECLARE(BuiltinVertexAttribute);
+STRINGMAP_DECLARE(BufferType);
 STRINGMAP_DECLARE(IndexDataType);
 STRINGMAP_DECLARE(BufferUsage);
 STRINGMAP_DECLARE(PrimitiveType);

src/modules/graphics/wrap_Buffer.cpp

@@ -432,6 +432,24 @@ static int w_Buffer_getFormat(lua_State *L)
 	return 1;
 }
 
+static int w_Buffer_isBufferType(lua_State *L)
+{
+	Buffer *t = luax_checkbuffer(L, 1);
+	BufferType buffertype = BUFFERTYPE_MAX_ENUM;
+	const char *typestr = luaL_checkstring(L, 2);
+	if (!getConstant(typestr, buffertype))
+		return luax_enumerror(L, "buffer type", getConstants(buffertype), typestr);
+	luax_pushboolean(L, (t->getTypeFlags() & (1 << buffertype)) != 0);
+	return 1;
+}
+
+static int w_Buffer_isCPUReadable(lua_State *L)
+{
+	Buffer *t = luax_checkbuffer(L, 1);
+	luax_pushboolean(L, (t->getMapFlags() & Buffer::MAP_READ) != 0);
+	return 1;
+}
+
 static const luaL_Reg w_Buffer_functions[] =
 {
 	{ "flush", w_Buffer_flush },
@@ -442,6 +460,8 @@ static const luaL_Reg w_Buffer_functions[] =
 	{ "getElementStride", w_Buffer_getElementStride },
 	{ "getSize", w_Buffer_getSize },
 	{ "getFormat", w_Buffer_getFormat },
+	{ "isBufferType", w_Buffer_isBufferType },
+	{ "isCPUReadable", w_Buffer_isCPUReadable },
 	{ 0, 0 }
 };
 

src/modules/graphics/wrap_Graphics.cpp

@@ -1669,10 +1669,16 @@ int w_newBuffer(lua_State *L)
 	Buffer::Settings settings(0, Buffer::MAP_EXPLICIT_RANGE_MODIFY, BUFFERUSAGE_DYNAMIC);
 
 	luaL_checktype(L, 3, LUA_TTABLE);
-	if (luax_boolflag(L, 3, "vertex", false))
-		settings.typeFlags = (Buffer::TypeFlags)(settings.typeFlags | Buffer::TYPEFLAG_VERTEX);
-	if (luax_boolflag(L, 3, "index", false))
-		settings.typeFlags = (Buffer::TypeFlags)(settings.typeFlags | Buffer::TYPEFLAG_INDEX);
+
+	for (int i = 0; i < BUFFERTYPE_MAX_ENUM; i++)
+	{
+		BufferType buffertype = (BufferType) i;
+		const char *tname = nullptr;
+		if (!getConstant(buffertype, tname))
+			continue;
+		if (luax_boolflag(L, 3, tname, false))
+			settings.typeFlags = (Buffer::TypeFlags)(settings.typeFlags | (1u << i));
+	}
 
 	luax_optbuffersettings(L, 3, settings);