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https://github.com/PixarAnimationStudios/OpenSubdiv
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Copyright 2013 Pixar
Licensed under the Apache License, Version 2.0 (the "Apache License")
with the following modification; you may not use this file except in
compliance with the Apache License and the following modification to it:
Section 6. Trademarks. is deleted and replaced with:
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor
and its affiliates, except as required to comply with Section 4(c) of
the License and to reproduce the content of the NOTICE file.
You may obtain a copy of the Apache License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the Apache License with the above modification is
distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the Apache License for the specific
language governing permissions and limitations under the Apache License.
101 lines
3.7 KiB
C++
101 lines
3.7 KiB
C++
//
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//
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// Copyright 2013 Pixar
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//
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// Licensed under the Apache License, Version 2.0 (the "Apache License")
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// with the following modification; you may not use this file except in
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// compliance with the Apache License and the following modification to it:
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// Section 6. Trademarks. is deleted and replaced with:
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//
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// 6. Trademarks. This License does not grant permission to use the trade
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// names, trademarks, service marks, or product names of the Licensor
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// and its affiliates, except as required to comply with Section 4(c) of
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// the License and to reproduce the content of the NOTICE file.
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//
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// You may obtain a copy of the Apache License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the Apache License with the above modification is
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// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the Apache License for the specific
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// language governing permissions and limitations under the Apache License.
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//
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#ifndef OSD_D3D11_PTEX_TEXTURE_H
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#define OSD_D3D11_PTEX_TEXTURE_H
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#include "../version.h"
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#include "../osd/nonCopyable.h"
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class PtexTexture;
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struct ID3D11Buffer;
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struct ID3D11Texture2D;
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struct ID3D11DeviceContext;
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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/// OsdD3D11PtexTexture : implements simple support for ptex textures
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///
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/// The current implementation declares _texels as a TEXTURE2D_ARRAY of
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/// n pages of a resolution that matches that of the largest face in the PTex file.
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///
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/// Two TEXTURE_BUFFER constructs are used
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/// as lookup tables :
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/// * _pages stores the array index in which a given face is located
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/// * _layout stores 4 float coordinates : top-left corner and width/height for each face
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///
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/// GLSL fragments use SV_PrimitiveID and SV_DomainLocation to access the _pages and _layout
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/// indirection tables, which provide then texture coordinates for the texels stored in
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/// the _texels texture array.
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///
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/// Hbr provides per-face support for a ptex face indexing scheme. OsdD3D11DrawContext
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/// class provides ptex face index lookup table as a texture buffer object that
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/// can be accessed by HLSL shaders.
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///
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class OsdD3D11PtexTexture : OsdNonCopyable<OsdD3D11PtexTexture> {
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public:
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static OsdD3D11PtexTexture * Create(ID3D11DeviceContext *deviceContext,
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PtexTexture * reader,
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unsigned long int targetMemory = 0,
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int gutterWidth = 0,
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int pageMargin = 0);
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/// Returns the texture buffer containing the lookup table associate each ptex
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/// face index with its 3D texture page in the texels texture array.
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ID3D11Buffer *GetPagesTextureBuffer() const { return _pages; }
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/// Returns the texture buffer containing the layout of the ptex faces in the
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/// texels texture array.
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ID3D11Buffer *GetLayoutTextureBuffer() const { return _layout; }
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/// Returns the texels texture array.
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ID3D11Texture2D *GetTexelsTexture() const { return _texels; }
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~OsdD3D11PtexTexture();
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private:
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OsdD3D11PtexTexture();
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int _width, // widht / height / depth of the 3D texel buffer
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_height,
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_depth;
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int _format; // texel color format
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ID3D11Buffer *_pages, // per-face page indices into the texel array
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*_layout; // per-face lookup table
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// (vec4 : top-left corner & width / height)
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ID3D11Texture2D *_texels; // texel data
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};
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} // end namespace OPENSUBDIV_VERSION
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using namespace OPENSUBDIV_VERSION;
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} // end namespace OpenSubdiv
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#endif // OSD_D3D11_PTEX_TEXTURE_H
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