1 files changed, 52 insertions, 0 deletions

diff --git a/src/renderer/RenderBuffer.cpp b/src/renderer/RenderBuffer.cpp
new file mode 100644
index 00000000..6120dfe2
--- /dev/null
+++ b/src/renderer/RenderBuffer.cpp
@@ -0,0 +1,52 @@
+#include "common.h"
+
+#include "RenderBuffer.h"
+
+int32 TempBufferVerticesStored;
+int32 TempBufferIndicesStored;
+
+RwIm3DVertex TempBufferRenderVertices[TEMPBUFFERVERTSIZE];
+RwImVertexIndex TempBufferRenderIndexList[TEMPBUFFERINDEXSIZE];
+
+int RenderBuffer::VerticesToBeStored;
+int RenderBuffer::IndicesToBeStored;
+
+void
+RenderBuffer::ClearRenderBuffer(void)
+{
+	TempBufferVerticesStored = 0;
+	TempBufferIndicesStored = 0;
+}
+
+void
+RenderBuffer::StartStoring(int numIndices, int numVertices, RwImVertexIndex **indexStart, RwIm3DVertex **vertexStart)
+{
+	if(TempBufferIndicesStored + numIndices >= TEMPBUFFERINDEXSIZE)
+		RenderStuffInBuffer();
+	if(TempBufferVerticesStored + numVertices >= TEMPBUFFERVERTSIZE)
+		RenderStuffInBuffer();
+        *indexStart = &TempBufferRenderIndexList[TempBufferIndicesStored];
+        *vertexStart = &TempBufferRenderVertices[TempBufferVerticesStored];
+        IndicesToBeStored = numIndices;
+        VerticesToBeStored = numVertices;
+}
+
+void
+RenderBuffer::StopStoring(void)
+{
+	int i;
+	for(i = TempBufferIndicesStored; i < TempBufferIndicesStored+IndicesToBeStored; i++)
+		TempBufferRenderIndexList[i] += TempBufferVerticesStored;
+	TempBufferIndicesStored += IndicesToBeStored;
+	TempBufferVerticesStored += VerticesToBeStored;
+}
+
+void
+RenderBuffer::RenderStuffInBuffer(void)
+{
+	if(TempBufferVerticesStored && RwIm3DTransform(TempBufferRenderVertices, TempBufferVerticesStored, nil, rwIM3D_VERTEXUV)){
+		RwIm3DRenderIndexedPrimitive(rwPRIMTYPETRILIST, TempBufferRenderIndexList, TempBufferIndicesStored);
+		RwIm3DEnd();
+	}
+	ClearRenderBuffer();
+}