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d3dx9: Create compact_mesh helper function for OptimizeInplace.

This commit is contained in:
Dylan Smith 2011-05-11 05:30:41 -04:00 committed by Alexandre Julliard
parent 428e0312b7
commit 4ed3930e27
1 changed files with 46 additions and 32 deletions
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78
dlls/d3dx9_36/mesh.c
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@ -652,6 +652,48 @@ static HRESULT WINAPI ID3DXMeshImpl_Optimize(ID3DXMesh *iface, DWORD flags, CONS
return E_NOTIMPL;
}
/* Creates a vertex_remap that removes unused vertices.
* Indices are updated according to the vertex_remap. */
static HRESULT compact_mesh(ID3DXMeshImpl *This, DWORD *indices, DWORD *new_num_vertices, ID3DXBuffer **vertex_remap)
{
HRESULT hr;
DWORD *vertex_remap_ptr;
DWORD num_used_vertices;
DWORD i;
hr = D3DXCreateBuffer(This->numvertices * sizeof(DWORD), vertex_remap);
if (FAILED(hr)) return hr;
vertex_remap_ptr = ID3DXBuffer_GetBufferPointer(*vertex_remap);
for (i = 0; i < This->numfaces * 3; i++)
vertex_remap_ptr[indices[i]] = 1;
/* create old->new vertex mapping */
num_used_vertices = 0;
for (i = 0; i < This->numvertices; i++) {
if (vertex_remap_ptr[i])
vertex_remap_ptr[i] = num_used_vertices++;
else
vertex_remap_ptr[i] = -1;
}
/* convert indices */
for (i = 0; i < This->numfaces * 3; i++)
indices[i] = vertex_remap_ptr[indices[i]];
/* create new->old vertex mapping */
num_used_vertices = 0;
for (i = 0; i < This->numvertices; i++) {
if (vertex_remap_ptr[i] != -1)
vertex_remap_ptr[num_used_vertices++] = i;
}
for (i = num_used_vertices; i < This->numvertices; i++)
vertex_remap_ptr[i] = -1;
*new_num_vertices = num_used_vertices;
return D3D_OK;
}
static HRESULT WINAPI ID3DXMeshImpl_OptimizeInplace(ID3DXMesh *iface, DWORD flags, CONST DWORD *adjacency_in, DWORD *adjacency_out,
DWORD *face_remap_out, LPD3DXBUFFER *vertex_remap_out)
{
@ -661,7 +703,7 @@ static HRESULT WINAPI ID3DXMeshImpl_OptimizeInplace(ID3DXMesh *iface, DWORD flag
ID3DXBuffer *vertex_remap = NULL;
DWORD *dword_indices = NULL;
DWORD new_num_vertices = 0;
DWORD new_vertex_buffer_size = 0;
DWORD new_num_alloc_vertices = 0;
IDirect3DVertexBuffer9 *vertex_buffer = NULL;
DWORD i;
@ -700,36 +742,9 @@ static HRESULT WINAPI ID3DXMeshImpl_OptimizeInplace(ID3DXMesh *iface, DWORD flag
if ((flags & (D3DXMESHOPT_COMPACT | D3DXMESHOPT_IGNOREVERTS)) == D3DXMESHOPT_COMPACT)
{
/* Remove unused vertices. */
DWORD *vertex_remap_ptr;
new_vertex_buffer_size = This->numvertices;
hr = D3DXCreateBuffer(This->numvertices * sizeof(DWORD), &vertex_remap);
new_num_alloc_vertices = This->numvertices;
hr = compact_mesh(This, dword_indices, &new_num_vertices, &vertex_remap);
if (FAILED(hr)) goto cleanup;
vertex_remap_ptr = ID3DXBuffer_GetBufferPointer(vertex_remap);
for (i = 0; i < This->numfaces * 3; i++)
vertex_remap_ptr[dword_indices[i]] = 1;
/* create old->new vertex mapping */
for (i = 0; i < This->numvertices; i++) {
if (vertex_remap_ptr[i])
vertex_remap_ptr[i] = new_num_vertices++;
else
vertex_remap_ptr[i] = -1;
}
/* convert indices */
for (i = 0; i < This->numfaces * 3; i++)
dword_indices[i] = vertex_remap_ptr[dword_indices[i]];
/* create new->old vertex mapping */
new_num_vertices = 0;
for (i = 0; i < This->numvertices; i++) {
if (vertex_remap_ptr[i] != -1)
vertex_remap_ptr[new_num_vertices++] = i;
}
for (i = new_num_vertices; i < This->numvertices; i++)
vertex_remap_ptr[i] = -1;
}
if (vertex_remap)
@ -744,8 +759,7 @@ static HRESULT WINAPI ID3DXMeshImpl_OptimizeInplace(ID3DXMesh *iface, DWORD flag
hr = IDirect3DVertexBuffer9_GetDesc(This->vertex_buffer, &vertex_desc);
if (FAILED(hr)) goto cleanup;
new_vertex_buffer_size *= vertex_size;
hr = IDirect3DDevice9_CreateVertexBuffer(This->device, new_vertex_buffer_size,
hr = IDirect3DDevice9_CreateVertexBuffer(This->device, new_num_alloc_vertices * vertex_size,
vertex_desc.Usage, This->fvf, vertex_desc.Pool, &vertex_buffer, NULL);
if (FAILED(hr)) goto cleanup;