Merge branch 'master' into wii-network

1 files changed, 144 insertions, 52 deletions

diff --git a/Source/Core/VideoCommon/Src/IndexGenerator.cpp b/Source/Core/VideoCommon/Src/IndexGenerator.cpp
index aa1a971687..28c62193c2 100644
--- a/Source/Core/VideoCommon/Src/IndexGenerator.cpp
+++ b/Source/Core/VideoCommon/Src/IndexGenerator.cpp
@@ -18,17 +18,9 @@
 #include <cstddef>
 
 #include "Common.h"
+#include "VideoConfig.h"
 #include "IndexGenerator.h"
 
-/*
-*
-QUAD simulator
-
-0   1   4   5
-3   2   7   6
-012023 147172 ...
-*/
-
 //Init
 u16 *IndexGenerator::Tptr;
 u16 *IndexGenerator::BASETptr;
@@ -41,6 +33,32 @@ u32 IndexGenerator::numL;
 u32 IndexGenerator::numP;
 u32 IndexGenerator::index;
 
+static const u16 s_primitive_restart = -1;
+
+static void (*primitive_table[8])(u32);
+
+void IndexGenerator::Init()
+{
+	if(g_Config.backend_info.bSupportsPrimitiveRestart)
+	{
+		primitive_table[0] = IndexGenerator::AddQuads<true>;
+		primitive_table[2] = IndexGenerator::AddList<true>;
+		primitive_table[3] = IndexGenerator::AddStrip<true>;
+		primitive_table[4] = IndexGenerator::AddFan<true>;
+	}
+	else
+	{
+		primitive_table[0] = IndexGenerator::AddQuads<false>;
+		primitive_table[2] = IndexGenerator::AddList<false>;
+		primitive_table[3] = IndexGenerator::AddStrip<false>;
+		primitive_table[4] = IndexGenerator::AddFan<false>;
+	}
+	primitive_table[1] = NULL;
+	primitive_table[5] = &IndexGenerator::AddLineList;
+	primitive_table[6] = &IndexGenerator::AddLineStrip;
+	primitive_table[7] = &IndexGenerator::AddPoints;
+}
+
 void IndexGenerator::Start(u16* Triangleptr, u16* Lineptr, u16* Pointptr)
 {
 	Tptr = Triangleptr;
@@ -57,82 +75,150 @@ void IndexGenerator::Start(u16* Triangleptr, u16* Lineptr, u16* Pointptr)
 
 void IndexGenerator::AddIndices(int primitive, u32 numVerts)
 {
-	//switch (primitive)
-	//{
-	//case GX_DRAW_QUADS:          IndexGenerator::AddQuads(numVerts);		break;
-	//case GX_DRAW_TRIANGLES:      IndexGenerator::AddList(numVerts);		break;
-	//case GX_DRAW_TRIANGLE_STRIP: IndexGenerator::AddStrip(numVerts);		break;
-	//case GX_DRAW_TRIANGLE_FAN:   IndexGenerator::AddFan(numVerts);		break;
-	//case GX_DRAW_LINES:          IndexGenerator::AddLineList(numVerts);	break;
-	//case GX_DRAW_LINE_STRIP:     IndexGenerator::AddLineStrip(numVerts);	break;
-	//case GX_DRAW_POINTS:         IndexGenerator::AddPoints(numVerts);		break;
-	//}
-
-	static void (*const primitive_table[])(u32) =
-	{
-		IndexGenerator::AddQuads,
-		NULL,
-		IndexGenerator::AddList,
-		IndexGenerator::AddStrip,
-		IndexGenerator::AddFan,
-		IndexGenerator::AddLineList,
-		IndexGenerator::AddLineStrip,
-		IndexGenerator::AddPoints,
-	};
-
 	primitive_table[primitive](numVerts);
 	index += numVerts;
 }
 
 // Triangles
-__forceinline void IndexGenerator::WriteTriangle(u32 index1, u32 index2, u32 index3)
+template <bool pr> __forceinline void IndexGenerator::WriteTriangle(u32 index1, u32 index2, u32 index3)
 {
 	*Tptr++ = index1;
 	*Tptr++ = index2;
 	*Tptr++ = index3;
-
+	if(pr)
+		*Tptr++ = s_primitive_restart;
+	
 	++numT;
 }
 
-void IndexGenerator::AddList(u32 const numVerts)
+template <bool pr> void IndexGenerator::AddList(u32 const numVerts)
 {
 	auto const numTris = numVerts / 3;
 	for (u32 i = 0; i != numTris; ++i)
 	{
-		WriteTriangle(index + i * 3, index + i * 3 + 1, index + i * 3 + 2);
+		WriteTriangle<pr>(index + i * 3, index + i * 3 + 1, index + i * 3 + 2);
 	}
+	u32 remainingVerts = numVerts - numTris*3;
+	if(remainingVerts)
+		ERROR_LOG(VIDEO, "AddList: unknown count of vertices found");
 }
 
-void IndexGenerator::AddStrip(u32 const numVerts)
+template <bool pr> void IndexGenerator::AddStrip(u32 const numVerts)
 {
-	bool wind = false;
-	for (u32 i = 2; i < numVerts; ++i)
-	{
-		WriteTriangle(
-			index + i - 2,
-			index + i - !wind,
-			index + i - wind);
+	if(pr) {
+		for (u32 i = 0; i < numVerts; ++i)
+		{
+			*Tptr++ = index + i;
+		}
+		*Tptr++ = s_primitive_restart;
+		numT += numVerts - 2;
+		
+	} else {
+		bool wind = false;
+		for (u32 i = 2; i < numVerts; ++i)
+		{
+			WriteTriangle<pr>(
+				index + i - 2,
+				index + i - !wind,
+				index + i - wind);
 
-		wind ^= true;
+			wind ^= true;
+		}
 	}
 }
 
-void IndexGenerator::AddFan(u32 numVerts)
+/**
+ * FAN simulator:
+ * 
+ *   2---3
+ *  / \ / \
+ * 1---0---4
+ * 
+ * would generate this triangles:
+ * 012, 023, 034
+ * 
+ * rotated (for better striping):
+ * 120, 302, 034
+ * 
+ * as odd ones have to winded, following strip is fine:
+ * 12034
+ * 
+ * so we use 6 indices for 3 triangles
+ */
+
+template <bool pr> void IndexGenerator::AddFan(u32 numVerts)
 {
-	for (u32 i = 2; i < numVerts; ++i)
+	u32 i = 2;
+	
+	if(pr) {
+		for(; i<=numVerts-3; i+=3) {
+			*Tptr++ = index + i - 1;
+			*Tptr++ = index + i + 0;
+			*Tptr++ = index;
+			*Tptr++ = index + i + 1;
+			*Tptr++ = index + i + 2;
+			*Tptr++ = s_primitive_restart;
+			numT += 3;
+		}
+		
+		for(; i<=numVerts-2; i+=2) {
+			*Tptr++ = index + i - 1;
+			*Tptr++ = index + i + 0;
+			*Tptr++ = index;
+			*Tptr++ = index + i + 1;
+			*Tptr++ = s_primitive_restart;
+			numT += 2;
+		}
+	}
+	
+	for (; i < numVerts; ++i)
 	{
-		WriteTriangle(index, index + i - 1, index + i);
+		WriteTriangle<pr>(index, index + i - 1, index + i);
 	}
 }
 
-void IndexGenerator::AddQuads(u32 numVerts)
+/*
+ * QUAD simulator
+ * 
+ * 0---1   4---5
+ * |\  |   |\  |
+ * | \ |   | \ |
+ * |  \|   |  \|
+ * 3---2   7---6
+ * 
+ * 012,023, 456,467 ...
+ * or 120,302, 564,746
+ * or as strip: 1203, 5647
+ * 
+ * Warning: 
+ * A simple triangle has to be rendered for three vertices.
+ * ZWW do this for sun rays
+ */
+template <bool pr> void IndexGenerator::AddQuads(u32 numVerts)
 {
 	auto const numQuads = numVerts / 4;
 	for (u32 i = 0; i != numQuads; ++i)
 	{
-		WriteTriangle(index + i * 4, index + i * 4 + 1, index + i * 4 + 2);
-		WriteTriangle(index + i * 4, index + i * 4 + 2, index + i * 4 + 3);
+		if(pr) {
+			*Tptr++ = index + i * 4 + 1;
+			*Tptr++ = index + i * 4 + 2;
+			*Tptr++ = index + i * 4 + 0;
+			*Tptr++ = index + i * 4 + 3;
+			*Tptr++ = s_primitive_restart;
+			numT += 2;
+		} else {
+			WriteTriangle<pr>(index + i * 4, index + i * 4 + 1, index + i * 4 + 2);
+			WriteTriangle<pr>(index + i * 4, index + i * 4 + 2, index + i * 4 + 3);
+		}
+	}
+	// three vertices remaining, so render a triangle
+	u32 remainingVerts = numVerts - numQuads*4;
+	if(remainingVerts == 3)
+	{
+		WriteTriangle<pr>(index+numVerts-3, index+numVerts-2, index+numVerts-1);
 	}
+	else if(remainingVerts)
+		ERROR_LOG(VIDEO, "AddQuads: unknown count of vertices found");
 }
 
 // Lines
@@ -145,8 +231,14 @@ void IndexGenerator::AddLineList(u32 numVerts)
 		*Lptr++ = index + i * 2 + 1;
 		++numL;
 	}
+	u32 remainingVerts = numVerts - numLines*2;
+	if(remainingVerts)
+		ERROR_LOG(VIDEO, "AddLineList: unknown count of vertices found");
+	
 }
 
+// shouldn't be used as strips as LineLists are much more common
+// so converting them to lists
 void IndexGenerator::AddLineStrip(u32 numVerts)
 {
 	for (u32 i = 1; i < numVerts; ++i)
@@ -170,6 +262,6 @@ void IndexGenerator::AddPoints(u32 numVerts)
 
 u32 IndexGenerator::GetRemainingIndices()
 {
-	u32 max_index = 65535;
+	u32 max_index = 65534; // -1 is reserved for primitive restart (ogl + dx11)
 	return max_index - index;
 }