Rename multiSampledBresenham to enableMultiSampling

The pipeline code doesn't need to know whether we're drawing Bresenham
lines or anything else. It just needs to know whether or not to enable
multisample rasterization for a multisample render target.

Also rename multiSample to multiSampleCount.

Bug: b/142965928
Change-Id: I34395e90d502c49cd13e0087d4b323d222cb2064
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/40169
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
diff --git a/src/Pipeline/PixelProgram.cpp b/src/Pipeline/PixelProgram.cpp
index 7782f20..7fd52fa 100644
--- a/src/Pipeline/PixelProgram.cpp
+++ b/src/Pipeline/PixelProgram.cpp
@@ -25,7 +25,7 @@
 {
 	// See if at least 1 sample is used
 	Int maskUnion = cMask[0];
-	for(auto i = 1u; i < state.multiSample; i++)
+	for(auto i = 1u; i < state.multiSampleCount; i++)
 	{
 		maskUnion |= cMask[i];
 	}
@@ -43,7 +43,7 @@
 {
 	// See if at least 1 sample is used
 	Int maskUnion = cMask[0] & sMask[0] & zMask[0];
-	for(auto i = 1u; i < state.multiSample; i++)
+	for(auto i = 1u; i < state.multiSampleCount; i++)
 	{
 		maskUnion |= (cMask[i] & sMask[i] & zMask[i]);
 	}
@@ -130,7 +130,7 @@
 		Int4 laneBits = Int4(1, 2, 4, 8);
 
 		Int4 inputSampleMask = Int4(1) & CmpNEQ(Int4(cMask[0]) & laneBits, Int4(0));
-		for(auto i = 1u; i < state.multiSample; i++)
+		for(auto i = 1u; i < state.multiSampleCount; i++)
 		{
 			inputSampleMask |= Int4(1 << i) & CmpNEQ(Int4(cMask[i]) & laneBits, Int4(0));
 		}
@@ -163,7 +163,7 @@
 
 	if(spirvShader->getModes().ContainsKill)
 	{
-		for(auto i = 0u; i < state.multiSample; i++)
+		for(auto i = 0u; i < state.multiSampleCount; i++)
 		{
 			cMask[i] &= ~routine.killMask;
 		}
@@ -174,7 +174,7 @@
 	{
 		auto outputSampleMask = As<SIMD::Int>(routine.getVariable(it->second.Id)[it->second.FirstComponent]);
 
-		for(auto i = 0u; i < state.multiSample; i++)
+		for(auto i = 0u; i < state.multiSampleCount; i++)
 		{
 			cMask[i] &= SignMask(CmpNEQ(outputSampleMask & SIMD::Int(1 << i), SIMD::Int(0)));
 		}
@@ -198,7 +198,7 @@
 
 	Int pass = cMask[0];
 
-	for(unsigned int q = 1; q < state.multiSample; q++)
+	for(unsigned int q = 1; q < state.multiSampleCount; q++)
 	{
 		pass = pass | cMask[q];
 	}
@@ -232,7 +232,7 @@
 			case VK_FORMAT_A8B8G8R8_SRGB_PACK32:
 			case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
 			case VK_FORMAT_A2R10G10B10_UNORM_PACK32:
-				for(unsigned int q = 0; q < state.multiSample; q++)
+				for(unsigned int q = 0; q < state.multiSampleCount; q++)
 				{
 					if(state.multiSampleMask & (1 << q))
 					{
@@ -278,7 +278,7 @@
 			case VK_FORMAT_A8B8G8R8_SINT_PACK32:
 			case VK_FORMAT_A2B10G10R10_UINT_PACK32:
 			case VK_FORMAT_A2R10G10B10_UINT_PACK32:
-				for(unsigned int q = 0; q < state.multiSample; q++)
+				for(unsigned int q = 0; q < state.multiSampleCount; q++)
 				{
 					if(state.multiSampleMask & (1 << q))
 					{