mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2025-01-09 08:10:07 +00:00
f0128a5f5e
This change restores the use of 4-bits in Far::PatchParam to encode the refinement level of a patch. This restores one bit that was stolen to allow for more general encoding of boundary edge and transition edge masks. In order to accommodate all of the bits that are required, the transition edge mask bits are now stored along with the faceId bits. Also, accessors are now exposed directly as members of Far::PatchParam and the internal bitfield class is no longer directly exposed.
117 lines
3.9 KiB
C++
117 lines
3.9 KiB
C++
//
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// Copyright 2015 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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#include "../osd/glPatchTable.h"
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#include "../far/patchTable.h"
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#include "../osd/opengl.h"
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#include "../osd/cpuPatchTable.h"
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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namespace Osd {
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GLPatchTable::GLPatchTable() :
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_patchIndexBuffer(0), _patchParamBuffer(0),
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_patchIndexTexture(0), _patchParamTexture(0) {
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}
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GLPatchTable::~GLPatchTable() {
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if (_patchIndexBuffer) glDeleteBuffers(1, &_patchIndexBuffer);
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if (_patchParamBuffer) glDeleteBuffers(1, &_patchParamBuffer);
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if (_patchIndexTexture) glDeleteTextures(1, &_patchIndexTexture);
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if (_patchParamTexture) glDeleteTextures(1, &_patchParamTexture);
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}
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GLPatchTable *
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GLPatchTable::Create(Far::PatchTable const *farPatchTable,
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void * /*deviceContext*/) {
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GLPatchTable *instance = new GLPatchTable();
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if (instance->allocate(farPatchTable)) return instance;
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delete instance;
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return 0;
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}
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bool
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GLPatchTable::allocate(Far::PatchTable const *farPatchTable) {
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glGenBuffers(1, &_patchIndexBuffer);
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glGenBuffers(1, &_patchParamBuffer);
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CpuPatchTable patchTable(farPatchTable);
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size_t numPatchArrays = patchTable.GetNumPatchArrays();
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GLsizei indexSize = (GLsizei)patchTable.GetPatchIndexSize();
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GLsizei patchParamSize = (GLsizei)patchTable.GetPatchParamSize();
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// copy patch array
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_patchArrays.assign(patchTable.GetPatchArrayBuffer(),
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patchTable.GetPatchArrayBuffer() + numPatchArrays);
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// copy index buffer
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _patchIndexBuffer);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER,
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indexSize * sizeof(GLint),
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patchTable.GetPatchIndexBuffer(),
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GL_STATIC_DRAW);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
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// copy patchparam buffer
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glBindBuffer(GL_ARRAY_BUFFER, _patchParamBuffer);
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glBufferData(GL_ARRAY_BUFFER,
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patchParamSize * sizeof(PatchParam),
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patchTable.GetPatchParamBuffer(),
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GL_STATIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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// make both buffer as texture buffers too.
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glGenTextures(1, &_patchIndexTexture);
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glGenTextures(1, &_patchParamTexture);
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GLuint buffer;
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glGenBuffers(1, &buffer);
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glBindBuffer(GL_ARRAY_BUFFER, buffer);
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glBufferData(GL_ARRAY_BUFFER,
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indexSize * sizeof(GLint),
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patchTable.GetPatchIndexBuffer(),
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GL_STATIC_DRAW);
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glBindTexture(GL_TEXTURE_BUFFER, _patchIndexTexture);
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// glTexBuffer(GL_TEXTURE_BUFFER, GL_R32I, _patchIndexBuffer);
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glTexBuffer(GL_TEXTURE_BUFFER, GL_R32I, buffer);
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glBindTexture(GL_TEXTURE_BUFFER, _patchParamTexture);
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glTexBuffer(GL_TEXTURE_BUFFER, GL_RGB32I, _patchParamBuffer);
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glBindTexture(GL_TEXTURE_BUFFER, 0);
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return true;
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}
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} // end namespace Osd
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} // end namespace OPENSUBDIV_VERSION
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} // end namespace OpenSubdiv
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