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Added index buffer compression support.

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This commit is contained in:
Branimir Karadžić
2014-12-31 16:11:07 -08:00
parent 53594ec5d4
commit c6efb167ba
9 changed files with 188 additions and 253 deletions
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26
examples/common/bgfx_utils.cpp
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@@ -14,6 +14,7 @@ namespace stl = tinystl;
#include <bx/readerwriter.h>
#include <bx/fpumath.h>
#include "entry/entry.h"
#include <ib-compress/indexbufferdecompression.h>
void* load(bx::FileReaderI* _reader, const char* _filePath)
{
@@ -279,6 +280,7 @@ struct Mesh
{
#define BGFX_CHUNK_MAGIC_VB BX_MAKEFOURCC('V', 'B', ' ', 0x1)
#define BGFX_CHUNK_MAGIC_IB BX_MAKEFOURCC('I', 'B', ' ', 0x0)
#define BGFX_CHUNK_MAGIC_IBC BX_MAKEFOURCC('I', 'B', 'C', 0x0)
#define BGFX_CHUNK_MAGIC_PRI BX_MAKEFOURCC('P', 'R', 'I', 0x0)
using namespace bx;
@@ -320,6 +322,30 @@ struct Mesh
}
break;
case BGFX_CHUNK_MAGIC_IBC:
{
uint32_t numIndices;
bx::read(_reader, numIndices);
const bgfx::Memory* mem = bgfx::alloc(numIndices*2);
uint32_t compressedSize;
bx::read(_reader, compressedSize);
bx::CrtAllocator allocator;
void* compressedIndices = BX_ALLOC(&allocator, compressedSize);
bx::read(_reader, compressedIndices, compressedSize);
ReadBitstream rbs( (const uint8_t*)compressedIndices, compressedSize);
DecompressIndexBuffer( (uint16_t*)mem->data, numIndices / 3, rbs);
BX_FREE(&allocator, compressedIndices);
group.m_ibh = bgfx::createIndexBuffer(mem);
}
break;
case BGFX_CHUNK_MAGIC_PRI:
{
uint16_t len;