mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2024-12-02 08:00:10 +00:00
ee061291b7
All kernels take offset/length/stride to apply subdivision partially in each vertex elements. Also the offset can be used for client-based VBO aggregation, without modifying index buffers. This is useful for topology sharing, in conjunction with glDrawElementsBaseVertex etc. However, gregory patch shader fetches vertex buffer via texture buffer, which index should also be offsetted too. Although gl_BaseVertexARB extension should be able to do that job, it's a relatively new extension. So we use OsdBaseVertex() call to mitigate the compatibility issue as clients can provide it in their way at least for the time being.
337 lines
13 KiB
C++
337 lines
13 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 "../osd/glslTransformFeedbackComputeController.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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#include <algorithm>
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#include <cassert>
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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OsdGLSLTransformFeedbackComputeController::OsdGLSLTransformFeedbackComputeController() :
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_vertexTexture(0), _varyingTexture(0), _vao(0) {
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}
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OsdGLSLTransformFeedbackComputeController::~OsdGLSLTransformFeedbackComputeController() {
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for (std::vector<OsdGLSLTransformFeedbackKernelBundle*>::iterator it =
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_kernelRegistry.begin();
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it != _kernelRegistry.end(); ++it) {
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delete *it;
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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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void
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OsdGLSLTransformFeedbackComputeController::Synchronize() {
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glFinish();
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}
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OsdGLSLTransformFeedbackKernelBundle *
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OsdGLSLTransformFeedbackComputeController::getKernels(
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OsdVertexBufferDescriptor const &vertexDesc,
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OsdVertexBufferDescriptor const &varyingDesc,
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bool interleaved) {
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std::vector<OsdGLSLTransformFeedbackKernelBundle*>::iterator it =
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std::find_if(_kernelRegistry.begin(), _kernelRegistry.end(),
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OsdGLSLTransformFeedbackKernelBundle::Match(
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vertexDesc, varyingDesc, interleaved));
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if (it != _kernelRegistry.end()) {
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return *it;
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} else {
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OsdGLSLTransformFeedbackKernelBundle *kernelBundle =
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new OsdGLSLTransformFeedbackKernelBundle();
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_kernelRegistry.push_back(kernelBundle);
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kernelBundle->Compile(vertexDesc, varyingDesc, interleaved);
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return kernelBundle;
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}
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}
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static void
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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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OsdGLSLTransformFeedbackComputeController::bindResources() {
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glEnable(GL_RASTERIZER_DISCARD);
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_currentBindState.kernelBundle->UseProgram(_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset);
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// bind vertex texture
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if (_currentBindState.vertexBuffer) {
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if (not _vertexTexture) glGenTextures(1, &_vertexTexture);
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#if defined(GL_EXT_direct_state_access)
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if (glTextureBufferEXT) {
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glTextureBufferEXT(_vertexTexture, GL_TEXTURE_BUFFER, GL_R32F, _currentBindState.vertexBuffer);
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} else {
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#else
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{
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#endif
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glBindTexture(GL_TEXTURE_BUFFER, _vertexTexture);
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glTexBuffer(GL_TEXTURE_BUFFER, GL_R32F, _currentBindState.vertexBuffer);
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glBindTexture(GL_TEXTURE_BUFFER, 0);
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}
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}
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if (_currentBindState.varyingBuffer) {
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if (not _varyingTexture) glGenTextures(1, &_varyingTexture);
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#if defined(GL_EXT_direct_state_access)
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if (glTextureBufferEXT) {
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glTextureBufferEXT(_varyingTexture, GL_TEXTURE_BUFFER, GL_R32F, _currentBindState.varyingBuffer);
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} else {
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#else
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{
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#endif
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glBindTexture(GL_TEXTURE_BUFFER, _varyingTexture);
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glTexBuffer(GL_TEXTURE_BUFFER, GL_R32F, _currentBindState.varyingBuffer);
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glBindTexture(GL_TEXTURE_BUFFER, 0);
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}
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}
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if (_vertexTexture)
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bindTexture(_currentBindState.kernelBundle->GetVertexUniformLocation(), _vertexTexture, 0);
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if (_varyingTexture)
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bindTexture(_currentBindState.kernelBundle->GetVaryingUniformLocation(), _varyingTexture, 1);
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// bind vertex texture image (for edit kernel)
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glUniform1i(_currentBindState.kernelBundle->GetVertexBufferImageUniformLocation(), 0);
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glBindImageTexture(0, _vertexTexture, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32F);
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// bind vertex array
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// always create new one, to be safe with multiple contexts.
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glGenVertexArrays(1, &_vao);
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glBindVertexArray(_vao);
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}
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void
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OsdGLSLTransformFeedbackComputeController::unbindResources() {
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_BUFFER, 0);
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glActiveTexture(GL_TEXTURE1);
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glBindTexture(GL_TEXTURE_BUFFER, 0);
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// unbind vertex texture image
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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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// unbind vertex array
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glBindVertexArray(0);
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glDeleteVertexArrays(1, &_vao);
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyBilinearFaceVerticesKernel(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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_currentBindState.kernelBundle->ApplyBilinearFaceVerticesKernel(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd());
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyBilinearEdgeVerticesKernel(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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_currentBindState.kernelBundle->ApplyBilinearEdgeVerticesKernel(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd());
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyBilinearVertexVerticesKernel(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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_currentBindState.kernelBundle->ApplyBilinearVertexVerticesKernel(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd());
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyCatmarkFaceVerticesKernel(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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_currentBindState.kernelBundle->ApplyCatmarkFaceVerticesKernel(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd());
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyCatmarkEdgeVerticesKernel(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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_currentBindState.kernelBundle->ApplyCatmarkEdgeVerticesKernel(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd());
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyCatmarkVertexVerticesKernelB(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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_currentBindState.kernelBundle->ApplyCatmarkVertexVerticesKernelB(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd());
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyCatmarkVertexVerticesKernelA1(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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_currentBindState.kernelBundle->ApplyCatmarkVertexVerticesKernelA(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd(), false);
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyCatmarkVertexVerticesKernelA2(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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_currentBindState.kernelBundle->ApplyCatmarkVertexVerticesKernelA(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd(), true);
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyLoopEdgeVerticesKernel(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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_currentBindState.kernelBundle->ApplyLoopEdgeVerticesKernel(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd());
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyLoopVertexVerticesKernelB(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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_currentBindState.kernelBundle->ApplyLoopVertexVerticesKernelB(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd());
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyLoopVertexVerticesKernelA1(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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_currentBindState.kernelBundle->ApplyLoopVertexVerticesKernelA(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd(), false);
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyLoopVertexVerticesKernelA2(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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_currentBindState.kernelBundle->ApplyLoopVertexVerticesKernelA(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd(), true);
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}
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void
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OsdGLSLTransformFeedbackComputeController::ApplyVertexEdits(
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FarKernelBatch const &batch, OsdGLSLTransformFeedbackComputeContext const *context) const {
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assert(context);
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const OsdGLSLTransformFeedbackHEditTable * edit = context->GetEditTable(batch.GetTableIndex());
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assert(edit);
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context->BindEditTextures(batch.GetTableIndex(), _currentBindState.kernelBundle);
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int primvarOffset = edit->GetPrimvarOffset();
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int primvarWidth = edit->GetPrimvarWidth();
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if (edit->GetOperation() == FarVertexEdit::Add) {
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_currentBindState.kernelBundle->ApplyEditAdd(
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_currentBindState.vertexBuffer, _currentBindState.varyingBuffer,
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_currentBindState.vertexDesc.offset, _currentBindState.varyingDesc.offset,
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primvarOffset, primvarWidth,
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batch.GetVertexOffset(), batch.GetTableOffset(), batch.GetStart(), batch.GetEnd());
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} else {
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// XXX: edit SET is not implemented yet.
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}
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context->UnbindEditTextures();
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}
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} // end namespace OPENSUBDIV_VERSION
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} // end namespace OpenSubdiv
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