mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2025-01-08 07:40:17 +00:00
007a2e8885
Also use GL_ARRAY_BUFFER for the binding point of updating indices instead of GL_ELEMENT_ARRAY_BUFFER
107 lines
3.6 KiB
C++
107 lines
3.6 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_ARRAY_BUFFER, _patchIndexBuffer);
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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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// 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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glBindTexture(GL_TEXTURE_BUFFER, _patchIndexTexture);
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glTexBuffer(GL_TEXTURE_BUFFER, GL_R32I, _patchIndexBuffer);
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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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