From 600bf0351476a5a21aabb5429132ddf7f52ac0b9 Mon Sep 17 00:00:00 2001
From: aap <aap@papnet.eu>
Date: Wed, 15 May 2019 16:52:37 +0200
Subject: first commit

---
 src/render/RenderBuffer.cpp | 59 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 src/render/RenderBuffer.cpp

(limited to 'src/render/RenderBuffer.cpp')

diff --git a/src/render/RenderBuffer.cpp b/src/render/RenderBuffer.cpp
new file mode 100644
index 00000000..9a1ed58d
--- /dev/null
+++ b/src/render/RenderBuffer.cpp
@@ -0,0 +1,59 @@
+#include "common.h"
+#include "patcher.h"
+#include "RenderBuffer.h"
+
+int32 &TempBufferVerticesStored = *(int32*)0x8F5F78;
+int32 &TempBufferIndicesStored = *(int32*)0x8F1A4C;
+
+RwIm3DVertex *TempVertexBuffer = (RwIm3DVertex*)0x862330;
+RwImVertexIndex *TempBufferRenderIndexList = (RwImVertexIndex*)0x846288;
+
+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 >= 1024)
+		RenderStuffInBuffer();
+	if(TempBufferVerticesStored + numVertices >= 256)
+		RenderStuffInBuffer();
+        *indexStart = &TempBufferRenderIndexList[TempBufferIndicesStored];
+        *vertexStart = &TempVertexBuffer[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(TempVertexBuffer, TempBufferVerticesStored, nil, rwIM3D_VERTEXUV)){
+		RwIm3DRenderIndexedPrimitive(rwPRIMTYPETRILIST, TempBufferRenderIndexList, TempBufferIndicesStored);
+		RwIm3DEnd();
+	}
+	ClearRenderBuffer();
+}
+
+STARTPATCHES
+	InjectHook(0x517620, RenderBuffer::ClearRenderBuffer, PATCH_JUMP);
+	InjectHook(0x517640, RenderBuffer::StartStoring, PATCH_JUMP);
+	InjectHook(0x5176B0, RenderBuffer::StopStoring, PATCH_JUMP);
+	InjectHook(0x5177C0, RenderBuffer::RenderStuffInBuffer, PATCH_JUMP);
+ENDPATCHES
-- 
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