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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.
319 lines
11 KiB
C++
319 lines
11 KiB
C++
//
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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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#include "../version.h"
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#include "../far/mesh.h"
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#include "../far/subdivisionTables.h"
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#include "../osd/debug.h"
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#include "../osd/glslTransformFeedbackComputeContext.h"
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#include "../osd/glslTransformFeedbackKernelBundle.h"
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#include "../osd/opengl.h"
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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void
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OsdGLSLTransformFeedbackTable::createTextureBuffer(size_t size, const void *ptr, GLenum type) {
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glGenBuffers(1, &_devicePtr);
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glGenTextures(1, &_texture);
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GLint prev = 0;
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glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &prev);
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glBindBuffer(GL_ARRAY_BUFFER, _devicePtr);
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glBufferData(GL_ARRAY_BUFFER, size, ptr, GL_STATIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, prev);
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glGetIntegerv(GL_TEXTURE_BINDING_BUFFER, &prev);
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glBindTexture(GL_TEXTURE_BUFFER, _texture);
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glTexBuffer(GL_TEXTURE_BUFFER, type, _devicePtr);
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glBindTexture(GL_TEXTURE_BUFFER, prev);
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glDeleteBuffers(1, &_devicePtr);
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}
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OsdGLSLTransformFeedbackTable::~OsdGLSLTransformFeedbackTable() {
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glDeleteTextures(1, &_texture);
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}
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GLuint
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OsdGLSLTransformFeedbackTable::GetTexture() const {
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return _texture;
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}
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// ----------------------------------------------------------------------------
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OsdGLSLTransformFeedbackHEditTable::OsdGLSLTransformFeedbackHEditTable(const FarVertexEditTables<OsdVertex>::VertexEditBatch &batch)
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: _primvarIndicesTable(new OsdGLSLTransformFeedbackTable(batch.GetVertexIndices(), GL_R32UI)),
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_editValuesTable(new OsdGLSLTransformFeedbackTable(batch.GetValues(), GL_R32F)) {
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_operation = batch.GetOperation();
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_primvarOffset = batch.GetPrimvarIndex();
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_primvarWidth = batch.GetPrimvarWidth();
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}
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OsdGLSLTransformFeedbackHEditTable::~OsdGLSLTransformFeedbackHEditTable() {
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delete _primvarIndicesTable;
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delete _editValuesTable;
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}
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const OsdGLSLTransformFeedbackTable *
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OsdGLSLTransformFeedbackHEditTable::GetPrimvarIndices() const {
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return _primvarIndicesTable;
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}
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const OsdGLSLTransformFeedbackTable *
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OsdGLSLTransformFeedbackHEditTable::GetEditValues() const {
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return _editValuesTable;
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}
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int
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OsdGLSLTransformFeedbackHEditTable::GetOperation() const {
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return _operation;
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}
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int
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OsdGLSLTransformFeedbackHEditTable::GetPrimvarOffset() const {
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return _primvarOffset;
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}
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int
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OsdGLSLTransformFeedbackHEditTable::GetPrimvarWidth() const {
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return _primvarWidth;
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}
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// ----------------------------------------------------------------------------
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OsdGLSLTransformFeedbackComputeContext::OsdGLSLTransformFeedbackComputeContext(
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FarMesh<OsdVertex> const *farMesh) :
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_vertexTexture(0), _varyingTexture(0) {
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FarSubdivisionTables<OsdVertex> const * farTables =
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farMesh->GetSubdivisionTables();
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// allocate 5 or 7 tables
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_tables.resize(7, 0);
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_tables[FarSubdivisionTables<OsdVertex>::E_IT] = new OsdGLSLTransformFeedbackTable(farTables->Get_E_IT(), GL_R32I);
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_tables[FarSubdivisionTables<OsdVertex>::V_IT] = new OsdGLSLTransformFeedbackTable(farTables->Get_V_IT(), GL_R32UI);
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_tables[FarSubdivisionTables<OsdVertex>::V_ITa] = new OsdGLSLTransformFeedbackTable(farTables->Get_V_ITa(), GL_R32I);
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_tables[FarSubdivisionTables<OsdVertex>::E_W] = new OsdGLSLTransformFeedbackTable(farTables->Get_E_W(), GL_R32F);
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_tables[FarSubdivisionTables<OsdVertex>::V_W] = new OsdGLSLTransformFeedbackTable(farTables->Get_V_W(), GL_R32F);
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if (farTables->GetNumTables() > 5) {
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// catmark, bilinear
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_tables[FarSubdivisionTables<OsdVertex>::F_IT] = new OsdGLSLTransformFeedbackTable(farTables->Get_F_IT(), GL_R32UI);
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_tables[FarSubdivisionTables<OsdVertex>::F_ITa] = new OsdGLSLTransformFeedbackTable(farTables->Get_F_ITa(), GL_R32I);
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} else {
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// loop
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_tables[FarSubdivisionTables<OsdVertex>::F_IT] = NULL;
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_tables[FarSubdivisionTables<OsdVertex>::F_ITa] = NULL;
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}
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// create hedit tables
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FarVertexEditTables<OsdVertex> const *editTables = farMesh->GetVertexEdit();
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if (editTables) {
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int numEditBatches = editTables->GetNumBatches();
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_editTables.reserve(numEditBatches);
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for (int i = 0; i < numEditBatches; ++i) {
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const FarVertexEditTables<OsdVertex>::VertexEditBatch & edit = editTables->GetBatch(i);
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_editTables.push_back(new OsdGLSLTransformFeedbackHEditTable(edit));
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}
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}
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}
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OsdGLSLTransformFeedbackComputeContext::~OsdGLSLTransformFeedbackComputeContext() {
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for (size_t i = 0; i < _tables.size(); ++i) {
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delete _tables[i];
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}
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for (size_t i = 0; i < _editTables.size(); ++i) {
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delete _editTables[i];
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}
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if (_vertexTexture) glDeleteTextures(1, &_vertexTexture);
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if (_varyingTexture) glDeleteTextures(1, &_varyingTexture);
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}
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const OsdGLSLTransformFeedbackTable *
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OsdGLSLTransformFeedbackComputeContext::GetTable(int tableIndex) const {
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return _tables[tableIndex];
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}
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int
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OsdGLSLTransformFeedbackComputeContext::GetNumEditTables() const {
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return static_cast<int>(_editTables.size());
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}
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const OsdGLSLTransformFeedbackHEditTable *
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OsdGLSLTransformFeedbackComputeContext::GetEditTable(int tableIndex) const {
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return _editTables[tableIndex];
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}
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GLuint
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OsdGLSLTransformFeedbackComputeContext::GetCurrentVertexBuffer() const {
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return _currentVertexBuffer;
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}
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GLuint
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OsdGLSLTransformFeedbackComputeContext::GetCurrentVaryingBuffer() const {
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return _currentVaryingBuffer;
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}
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OsdGLSLTransformFeedbackKernelBundle *
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OsdGLSLTransformFeedbackComputeContext::GetKernelBundle() const {
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return _kernelBundle;
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}
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void
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OsdGLSLTransformFeedbackComputeContext::SetKernelBundle(OsdGLSLTransformFeedbackKernelBundle *kernelBundle) {
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_kernelBundle = kernelBundle;
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}
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OsdGLSLTransformFeedbackComputeContext *
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OsdGLSLTransformFeedbackComputeContext::Create(FarMesh<OsdVertex> const *farmesh) {
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return new OsdGLSLTransformFeedbackComputeContext(farmesh);
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}
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void
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OsdGLSLTransformFeedbackComputeContext::BindEditTextures(int editIndex) {
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const OsdGLSLTransformFeedbackHEditTable * edit = _editTables[editIndex];
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const OsdGLSLTransformFeedbackTable * primvarIndices = edit->GetPrimvarIndices();
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const OsdGLSLTransformFeedbackTable * editValues = edit->GetEditValues();
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bindTexture(_kernelBundle->GetEditIndicesUniformLocation(),
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primvarIndices->GetTexture(), 9);
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bindTexture(_kernelBundle->GetEditValuesUniformLocation(),
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editValues->GetTexture(), 10);
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}
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void
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OsdGLSLTransformFeedbackComputeContext::UnbindEditTextures() {
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unbindTexture(9);
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unbindTexture(10);
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}
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void
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OsdGLSLTransformFeedbackComputeContext::bindTexture(GLint samplerUniform, GLuint texture, int unit) {
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if (samplerUniform == -1) return;
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glUniform1i(samplerUniform, unit);
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glActiveTexture(GL_TEXTURE0 + unit);
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glBindTexture(GL_TEXTURE_BUFFER, texture);
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glActiveTexture(GL_TEXTURE0);
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}
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void
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OsdGLSLTransformFeedbackComputeContext::unbindTexture(GLuint unit) {
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glActiveTexture(GL_TEXTURE0 + unit);
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glBindTexture(GL_TEXTURE_BUFFER, 0);
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}
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void
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OsdGLSLTransformFeedbackComputeContext::bind() {
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glEnable(GL_RASTERIZER_DISCARD);
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_kernelBundle->UseProgram();
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// bind vertex texture
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if (_currentVertexBuffer) {
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if (not _vertexTexture) glGenTextures(1, &_vertexTexture);
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glBindTexture(GL_TEXTURE_BUFFER, _vertexTexture);
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glTexBuffer(GL_TEXTURE_BUFFER, GL_R32F, _currentVertexBuffer);
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glBindTexture(GL_TEXTURE_BUFFER, 0);
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}
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if (_currentVaryingBuffer) {
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if (not _varyingTexture) glGenTextures(1, &_varyingTexture);
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glBindTexture(GL_TEXTURE_BUFFER, _varyingTexture);
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glTexBuffer(GL_TEXTURE_BUFFER, GL_R32F, _currentVaryingBuffer);
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glBindTexture(GL_TEXTURE_BUFFER, 0);
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}
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if (_vertexTexture)
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bindTexture(_kernelBundle->GetVertexUniformLocation(), _vertexTexture, 0);
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if (_varyingTexture)
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bindTexture(_kernelBundle->GetVaryingUniformLocation(), _varyingTexture, 1);
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// XXX: loop...
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if (_tables[FarSubdivisionTables<OsdVertex>::F_IT]) {
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bindTexture(_kernelBundle->GetTableUniformLocation(FarSubdivisionTables<OsdVertex>::F_IT),
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_tables[FarSubdivisionTables<OsdVertex>::F_IT]->GetTexture(), 2);
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bindTexture(_kernelBundle->GetTableUniformLocation(FarSubdivisionTables<OsdVertex>::F_ITa),
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_tables[FarSubdivisionTables<OsdVertex>::F_ITa]->GetTexture(), 3);
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}
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bindTexture(_kernelBundle->GetTableUniformLocation(FarSubdivisionTables<OsdVertex>::E_IT),
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_tables[FarSubdivisionTables<OsdVertex>::E_IT]->GetTexture(), 4);
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bindTexture(_kernelBundle->GetTableUniformLocation(FarSubdivisionTables<OsdVertex>::V_IT),
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_tables[FarSubdivisionTables<OsdVertex>::V_IT]->GetTexture(), 5);
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bindTexture(_kernelBundle->GetTableUniformLocation(FarSubdivisionTables<OsdVertex>::V_ITa),
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_tables[FarSubdivisionTables<OsdVertex>::V_ITa]->GetTexture(), 6);
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bindTexture(_kernelBundle->GetTableUniformLocation(FarSubdivisionTables<OsdVertex>::E_W),
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_tables[FarSubdivisionTables<OsdVertex>::E_W]->GetTexture(), 7);
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bindTexture(_kernelBundle->GetTableUniformLocation(FarSubdivisionTables<OsdVertex>::V_W),
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_tables[FarSubdivisionTables<OsdVertex>::V_W]->GetTexture(), 8);
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// bind texture image (for edit kernel)
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glUniform1i(_kernelBundle->GetVertexBufferImageUniformLocation(), 0);
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glBindImageTexture(0, _vertexTexture, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32F);
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}
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void
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OsdGLSLTransformFeedbackComputeContext::unbind() {
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for (int i = 8; i >= 0; --i) {
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unbindTexture(i);
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}
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glBindImageTexture(0, 0, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32F);
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glDisable(GL_RASTERIZER_DISCARD);
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glUseProgram(0);
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glActiveTexture(GL_TEXTURE0);
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}
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} // end namespace OPENSUBDIV_VERSION
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} // end namespace OpenSubdiv
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