From 847962910f0bff071f3bf07c9abb87764fb6cac3 Mon Sep 17 00:00:00 2001
From: claude-bot <claude@ancap.in.ua>
Date: Mon, 13 Jul 2026 12:40:03 +0000
Subject: Import aap/librw @ master

Snapshot for re3/reVC vendoring, per @lzcnt.
Source: https://github.com/aap/librw (master).
---
 src/d3d/xboxvfmt.cpp | 115 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 src/d3d/xboxvfmt.cpp

(limited to 'src/d3d/xboxvfmt.cpp')

diff --git a/src/d3d/xboxvfmt.cpp b/src/d3d/xboxvfmt.cpp
new file mode 100644
index 0000000..b6569dc
--- /dev/null
+++ b/src/d3d/xboxvfmt.cpp
@@ -0,0 +1,115 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include "../rwbase.h"
+#include "../rwerror.h"
+#include "../rwplg.h"
+#include "../rwpipeline.h"
+#include "../rwobjects.h"
+#include "../rwanim.h"
+#include "../rwengine.h"
+#include "../rwplugins.h"
+#include "rwxbox.h"
+
+namespace rw {
+namespace xbox {
+
+static int32 vertexFmtOffset;
+
+uint32 vertexFormatSizes[6] = {
+	0, 1, 2, 2, 4, 4
+};
+
+uint32*
+getVertexFmt(Geometry *g)
+{
+	return PLUGINOFFSET(uint32, g, vertexFmtOffset);
+}
+
+uint32
+makeVertexFmt(int32 flags, uint32 numTexSets)
+{
+	if(numTexSets > 4)
+		numTexSets = 4;
+	uint32 fmt = 0x5;	// FLOAT3
+	if(flags & Geometry::NORMALS)
+		fmt |= 0x40;	// NORMPACKED3
+	for(uint32 i = 0; i < numTexSets; i++)
+		fmt |= 0x500 << i*4;	// FLOAT2
+	if(flags & Geometry::PRELIT)
+		fmt |= 0x1000000;	// D3DCOLOR
+	return fmt;
+}
+
+uint32
+getVertexFmtStride(uint32 fmt)
+{
+	uint32 stride = 0;
+	uint32 v = fmt & 0xF;
+	uint32 n = (fmt >> 4) & 0xF;
+	stride += v == 4 ? 4 : 3*vertexFormatSizes[v];
+	stride += n == 4 ? 4 : 3*vertexFormatSizes[n];
+	if(fmt & 0x1000000)
+		stride += 4;
+	for(int i = 0; i < 4; i++){
+		uint32 t = (fmt >> (i*4 + 8)) & 0xF;
+		stride += t == 4 ? 4 : 2*vertexFormatSizes[t];
+	}
+	if(fmt & 0xE000000)
+		stride += 8;
+	return stride;
+}
+
+static void*
+createVertexFmt(void *object, int32 offset, int32)
+{
+	*PLUGINOFFSET(uint32, object, offset) = 0;
+	return object;
+}
+
+static void*
+copyVertexFmt(void *dst, void *src, int32 offset, int32)
+{
+	*PLUGINOFFSET(uint32, dst, offset) = *PLUGINOFFSET(uint32, src, offset);
+	return dst;
+}
+
+static Stream*
+readVertexFmt(Stream *stream, int32, void *object, int32 offset, int32)
+{
+	uint32 fmt = stream->readU32();
+	*PLUGINOFFSET(uint32, object, offset) = fmt;
+	// TODO: ? create and attach "vertex shader"
+	return stream;
+}
+
+static Stream*
+writeVertexFmt(Stream *stream, int32, void *object, int32 offset, int32)
+{
+	stream->writeI32(*PLUGINOFFSET(uint32, object, offset));
+	return stream;
+}
+
+static int32
+getSizeVertexFmt(void*, int32, int32)
+{
+	if(rw::platform != PLATFORM_XBOX)
+		return -1;
+	return 4;
+}
+
+void
+registerVertexFormatPlugin(void)
+{
+	vertexFmtOffset = Geometry::registerPlugin(sizeof(uint32), ID_VERTEXFMT,
+	                         createVertexFmt, nil, copyVertexFmt);
+	Geometry::registerPluginStream(ID_VERTEXFMT,
+	                               readVertexFmt,
+	                               writeVertexFmt,
+	                               getSizeVertexFmt);
+}
+
+}
+}
-- 
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