SWVertexLoader: fix truncated components

1 files changed, 9 insertions, 3 deletions

diff --git a/Source/Core/VideoBackends/Software/SWVertexLoader.cpp b/Source/Core/VideoBackends/Software/SWVertexLoader.cpp
index d824893243..859cf593b4 100644
--- a/Source/Core/VideoBackends/Software/SWVertexLoader.cpp
+++ b/Source/Core/VideoBackends/Software/SWVertexLoader.cpp
@@ -100,16 +100,17 @@ static T ReadNormalized(I value)
 }
 
 template <typename T, bool swap = false>
-static void ReadVertexAttribute(T* dst, DataReader src, const AttributeFormat& format, int base_component, int max_components, bool reverse)
+static void ReadVertexAttribute(T* dst, DataReader src, const AttributeFormat& format, int base_component, int components, bool reverse)
 {
 	if (format.enable)
 	{
 		src.Skip(format.offset);
 		src.Skip(base_component * (1<<(format.type>>1)));
 
-		for (int i = 0; i < std::min(format.components - base_component, max_components); i++)
+		int i;
+		for (i = 0; i < std::min(format.components - base_component, components); i++)
 		{
-			int i_dst = reverse ? max_components - i - 1 : i;
+			int i_dst = reverse ? components - i - 1 : i;
 			switch (format.type)
 			{
 				case VAR_UNSIGNED_BYTE:
@@ -131,6 +132,11 @@ static void ReadVertexAttribute(T* dst, DataReader src, const AttributeFormat& f
 
 			_assert_msg_(VIDEO, !format.integer || format.type != VAR_FLOAT, "only non-float values are allowed to be streamed as integer");
 		}
+		for (; i < components; i++)
+		{
+			int i_dst = reverse ? components - i - 1 : i;
+			dst[i_dst] = i == 3;
+		}
 	}
 }