mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2024-12-12 03:50:09 +00:00
935 lines
35 KiB
C++
935 lines
35 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/glXFBEvaluator.h"
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#include "../osd/glslPatchShaderSource.h"
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#include <sstream>
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#include <string>
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#include <vector>
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#include <cstdio>
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#include "../far/error.h"
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#include "../far/stencilTable.h"
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#if _MSC_VER
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#define snprintf _snprintf
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#endif
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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namespace Osd {
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static const char *shaderSource =
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#include "../osd/glslXFBKernel.gen.h"
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;
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template <class T> GLuint
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createGLTextureBuffer(std::vector<T> const & src, GLenum type) {
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if (src.empty()) {
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return 0;
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}
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GLint size = static_cast<int>(src.size()*sizeof(T));
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void const * ptr = &src.at(0);
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GLuint buffer;
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glGenBuffers(1, &buffer);
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GLuint devicePtr;
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glGenTextures(1, &devicePtr);
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#if defined(GL_EXT_direct_state_access)
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if (glNamedBufferDataEXT && glTextureBufferEXT) {
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glNamedBufferDataEXT(buffer, size, ptr, GL_STATIC_DRAW);
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glTextureBufferEXT(devicePtr, GL_TEXTURE_BUFFER, type, buffer);
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} else {
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#else
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{
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#endif
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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, buffer);
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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, devicePtr);
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glTexBuffer(GL_TEXTURE_BUFFER, type, buffer);
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glBindTexture(GL_TEXTURE_BUFFER, prev);
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}
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glDeleteBuffers(1, &buffer);
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return devicePtr;
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}
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GLStencilTableTBO::GLStencilTableTBO(
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Far::StencilTable const *stencilTable) {
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_numStencils = stencilTable->GetNumStencils();
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if (_numStencils > 0) {
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_sizes = createGLTextureBuffer(stencilTable->GetSizes(), GL_R32UI);
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_offsets = createGLTextureBuffer(
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stencilTable->GetOffsets(), GL_R32I);
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_indices = createGLTextureBuffer(
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stencilTable->GetControlIndices(), GL_R32I);
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_weights = createGLTextureBuffer(stencilTable->GetWeights(), GL_R32F);
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_duWeights = _dvWeights = 0;
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_duuWeights = _duvWeights = _dvvWeights = 0;
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} else {
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_sizes = _offsets = _indices = _weights = 0;
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_duWeights = _dvWeights = 0;
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_duuWeights = _duvWeights = _dvvWeights = 0;
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}
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}
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GLStencilTableTBO::GLStencilTableTBO(
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Far::LimitStencilTable const *limitStencilTable) {
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_numStencils = limitStencilTable->GetNumStencils();
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if (_numStencils > 0) {
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_sizes = createGLTextureBuffer(
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limitStencilTable->GetSizes(), GL_R32UI);
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_offsets = createGLTextureBuffer(
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limitStencilTable->GetOffsets(), GL_R32I);
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_indices = createGLTextureBuffer(
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limitStencilTable->GetControlIndices(), GL_R32I);
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_weights = createGLTextureBuffer(
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limitStencilTable->GetWeights(), GL_R32F);
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_duWeights = createGLTextureBuffer(
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limitStencilTable->GetDuWeights(), GL_R32F);
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_dvWeights = createGLTextureBuffer(
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limitStencilTable->GetDvWeights(), GL_R32F);
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_duuWeights = createGLTextureBuffer(
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limitStencilTable->GetDuuWeights(), GL_R32F);
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_duvWeights = createGLTextureBuffer(
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limitStencilTable->GetDuvWeights(), GL_R32F);
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_dvvWeights = createGLTextureBuffer(
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limitStencilTable->GetDvvWeights(), GL_R32F);
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} else {
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_sizes = _offsets = _indices = _weights = 0;
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_duWeights = _dvWeights = 0;
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_duuWeights = _duvWeights = _dvvWeights = 0;
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}
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}
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GLStencilTableTBO::~GLStencilTableTBO() {
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if (_sizes) glDeleteTextures(1, &_sizes);
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if (_offsets) glDeleteTextures(1, &_offsets);
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if (_indices) glDeleteTextures(1, &_indices);
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if (_weights) glDeleteTextures(1, &_weights);
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if (_duWeights) glDeleteTextures(1, &_duWeights);
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if (_dvWeights) glDeleteTextures(1, &_dvWeights);
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if (_duuWeights) glDeleteTextures(1, &_duuWeights);
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if (_duvWeights) glDeleteTextures(1, &_duvWeights);
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if (_dvvWeights) glDeleteTextures(1, &_dvvWeights);
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}
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// ---------------------------------------------------------------------------
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GLXFBEvaluator::GLXFBEvaluator(bool interleavedDerivativeBuffers)
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: _srcBufferTexture(0),
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_interleavedDerivativeBuffers(interleavedDerivativeBuffers) {
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}
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GLXFBEvaluator::~GLXFBEvaluator() {
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if (_srcBufferTexture) {
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glDeleteTextures(1, &_srcBufferTexture);
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}
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}
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static GLuint
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compileKernel(BufferDescriptor const &srcDesc,
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BufferDescriptor const &dstDesc,
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BufferDescriptor const &duDesc,
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BufferDescriptor const &dvDesc,
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BufferDescriptor const &duuDesc,
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BufferDescriptor const &duvDesc,
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BufferDescriptor const &dvvDesc,
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const char *kernelDefine,
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bool interleavedDerivativeBuffers) {
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GLuint program = glCreateProgram();
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GLuint vertexShader = glCreateShader(GL_VERTEX_SHADER);
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std::string patchBasisShaderSource =
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GLSLPatchShaderSource::GetPatchBasisShaderSource();
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const char *patchBasisShaderSourceDefine = "#define OSD_PATCH_BASIS_GLSL\n";
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std::ostringstream defines;
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defines << "#define LENGTH " << srcDesc.length << "\n"
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<< "#define SRC_STRIDE " << srcDesc.stride << "\n"
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<< "#define VERTEX_SHADER\n"
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<< kernelDefine << "\n"
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<< patchBasisShaderSourceDefine << "\n";
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bool deriv1 = (duDesc.length > 0 || dvDesc.length > 0);
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bool deriv2 = (duuDesc.length > 0 || duvDesc.length > 0 || dvvDesc.length > 0);
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if (deriv1) {
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defines << "#define OPENSUBDIV_GLSL_XFB_USE_1ST_DERIVATIVES\n";
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if (interleavedDerivativeBuffers) {
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defines <<
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"#define OPENSUBDIV_GLSL_XFB_INTERLEAVED_1ST_DERIVATIVE_BUFFERS\n";
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}
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}
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if (deriv2) {
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defines << "#define OPENSUBDIV_GLSL_XFB_USE_2ND_DERIVATIVES\n";
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if (interleavedDerivativeBuffers) {
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defines <<
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"#define OPENSUBDIV_GLSL_XFB_INTERLEAVED_2ND_DERIVATIVE_BUFFERS\n";
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}
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}
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std::string defineStr = defines.str();
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const char *shaderSources[4] = {"#version 410\n", NULL, NULL, NULL};
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shaderSources[1] = defineStr.c_str();
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shaderSources[2] = patchBasisShaderSource.c_str();
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shaderSources[3] = shaderSource;
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glShaderSource(vertexShader, 4, shaderSources, NULL);
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glCompileShader(vertexShader);
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glAttachShader(program, vertexShader);
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std::vector<std::string> outputs;
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char attrName[32];
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{
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// vertex data (may include custom vertex data) and varying data
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// are stored into the same buffer, interleaved.
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//
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// (gl_SkipComponents1)
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// outVertexData[0]
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// outVertexData[1]
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// outVertexData[2]
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// (gl_SkipComponents1)
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//
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// note that "primvarOffset" in shader is still needed to read
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// interleaved components even if gl_SkipComponents is used.
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//
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int primvarOffset = (dstDesc.offset % dstDesc.stride);
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for (int i = 0; i < primvarOffset; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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for (int i = 0; i < dstDesc.length; ++i) {
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snprintf(attrName, sizeof(attrName), "outVertexBuffer[%d]", i);
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outputs.push_back(attrName);
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}
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for (int i = primvarOffset + dstDesc.length; i < dstDesc.stride; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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}
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//
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// For derivatives, we use another buffer bindings so gl_NextBuffer
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// is inserted here to switch the destination of transform feedback.
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//
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// Note that the destination buffers may or may not be interleaved between
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// vertex and each derivatives. gl_NextBuffer seems still works well
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// in either case.
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//
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// If we know that the buffers for derivatives are interleaved, then we
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// can use fewer buffer bindings. This can be important, since most GL
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// implementations will support only up to 4 transform feedback bindings.
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//
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if (deriv1 && interleavedDerivativeBuffers) {
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outputs.push_back("gl_NextBuffer");
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int primvar1Offset = (duDesc.offset % duDesc.stride);
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int primvar2Offset = (dvDesc.offset % dvDesc.stride);
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for (int i = 0; i < primvar1Offset; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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for (int i = 0; i < duDesc.length; ++i) {
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snprintf(attrName, sizeof(attrName), "outDeriv1Buffer[%d]", i);
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outputs.push_back(attrName);
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}
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for (int i = primvar1Offset + duDesc.length; i < primvar2Offset; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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for (int i = 0; i < dvDesc.length; ++i) {
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snprintf(attrName, sizeof(attrName), "outDeriv1Buffer[%d]", i+duDesc.length);
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outputs.push_back(attrName);
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}
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for (int i = primvar2Offset + dvDesc.length; i < dvDesc.stride; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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} else {
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if (duDesc.length) {
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outputs.push_back("gl_NextBuffer");
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int primvarOffset = (duDesc.offset % duDesc.stride);
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for (int i = 0; i < primvarOffset; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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for (int i = 0; i < duDesc.length; ++i) {
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snprintf(attrName, sizeof(attrName), "outDuBuffer[%d]", i);
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outputs.push_back(attrName);
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}
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for (int i = primvarOffset + duDesc.length; i < duDesc.stride; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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}
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if (dvDesc.length) {
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outputs.push_back("gl_NextBuffer");
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int primvarOffset = (dvDesc.offset % dvDesc.stride);
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for (int i = 0; i < primvarOffset; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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for (int i = 0; i < dvDesc.length; ++i) {
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snprintf(attrName, sizeof(attrName), "outDvBuffer[%d]", i);
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outputs.push_back(attrName);
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}
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for (int i = primvarOffset + dvDesc.length; i < dvDesc.stride; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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}
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}
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if (deriv2 && interleavedDerivativeBuffers) {
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outputs.push_back("gl_NextBuffer");
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int primvar1Offset = (duuDesc.offset % duuDesc.stride);
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int primvar2Offset = (duvDesc.offset % duvDesc.stride);
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int primvar3Offset = (dvvDesc.offset % dvvDesc.stride);
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for (int i = 0; i < primvar1Offset; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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for (int i = 0; i < duuDesc.length; ++i) {
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snprintf(attrName, sizeof(attrName), "outDeriv2Buffer[%d]", i);
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outputs.push_back(attrName);
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}
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for (int i = primvar1Offset + duuDesc.length; i < primvar2Offset; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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for (int i = 0; i < duvDesc.length; ++i) {
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snprintf(attrName, sizeof(attrName), "outDeriv2Buffer[%d]", i+duuDesc.length);
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outputs.push_back(attrName);
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}
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for (int i = primvar2Offset + duvDesc.length; i < primvar3Offset; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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for (int i = 0; i < dvvDesc.length; ++i) {
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snprintf(attrName, sizeof(attrName), "outDeriv2Buffer[%d]", i+duuDesc.length+duvDesc.length);
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outputs.push_back(attrName);
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}
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for (int i = primvar3Offset + dvvDesc.length; i < dvvDesc.stride; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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} else {
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if (duuDesc.length) {
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outputs.push_back("gl_NextBuffer");
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int primvarOffset = (duuDesc.offset % duuDesc.stride);
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for (int i = 0; i < primvarOffset; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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for (int i = 0; i < duuDesc.length; ++i) {
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snprintf(attrName, sizeof(attrName), "outDuuBuffer[%d]", i);
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outputs.push_back(attrName);
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}
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for (int i = primvarOffset + duuDesc.length; i < duuDesc.stride; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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}
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if (duvDesc.length) {
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outputs.push_back("gl_NextBuffer");
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int primvarOffset = (duvDesc.offset % duvDesc.stride);
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for (int i = 0; i < primvarOffset; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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for (int i = 0; i < duvDesc.length; ++i) {
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snprintf(attrName, sizeof(attrName), "outDuvBuffer[%d]", i);
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outputs.push_back(attrName);
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}
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for (int i = primvarOffset + duvDesc.length; i < duvDesc.stride; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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}
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if (dvvDesc.length) {
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outputs.push_back("gl_NextBuffer");
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int primvarOffset = (dvvDesc.offset % dvvDesc.stride);
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for (int i = 0; i < primvarOffset; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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for (int i = 0; i < dvvDesc.length; ++i) {
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snprintf(attrName, sizeof(attrName), "outDvvBuffer[%d]", i);
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outputs.push_back(attrName);
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}
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for (int i = primvarOffset + dvvDesc.length; i < dvvDesc.stride; ++i) {
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outputs.push_back("gl_SkipComponents1");
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}
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}
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}
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// convert to char* array
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std::vector<const char *> pOutputs;
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for (size_t i = 0; i < outputs.size(); ++i) {
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pOutputs.push_back(&outputs[i][0]);
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}
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glTransformFeedbackVaryings(program, (GLsizei)outputs.size(),
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&pOutputs[0], GL_INTERLEAVED_ATTRIBS);
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GLint linked = 0;
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glLinkProgram(program);
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glGetProgramiv(program, GL_LINK_STATUS, &linked);
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if (linked == GL_FALSE) {
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char buffer[1024];
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glGetShaderInfoLog(vertexShader, 1024, NULL, buffer);
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Far::Error(Far::FAR_RUNTIME_ERROR, buffer);
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glGetProgramInfoLog(program, 1024, NULL, buffer);
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Far::Error(Far::FAR_RUNTIME_ERROR, buffer);
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glDeleteProgram(program);
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program = 0;
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}
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glDeleteShader(vertexShader);
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return program;
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}
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bool
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GLXFBEvaluator::Compile(BufferDescriptor const &srcDesc,
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BufferDescriptor const &dstDesc,
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BufferDescriptor const &duDesc,
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BufferDescriptor const &dvDesc,
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BufferDescriptor const &duuDesc,
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BufferDescriptor const &duvDesc,
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BufferDescriptor const &dvvDesc) {
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// create a stencil kernel
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_stencilKernel.Compile(srcDesc, dstDesc, duDesc, dvDesc,
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duuDesc, duvDesc, dvvDesc,
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_interleavedDerivativeBuffers);
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// create a patch kernel
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_patchKernel.Compile(srcDesc, dstDesc, duDesc, dvDesc,
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duuDesc, duvDesc, dvvDesc,
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_interleavedDerivativeBuffers);
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// create a texture for input buffer
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if (!_srcBufferTexture) {
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glGenTextures(1, &_srcBufferTexture);
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}
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return true;
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}
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/* static */
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void
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GLXFBEvaluator::Synchronize(void * /*kernel*/) {
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// XXX: this is currently just for the test purpose.
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// need to be reimplemented by fence and sync.
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glFinish();
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}
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static void
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bindTexture(GLint sampler, GLuint texture, int unit) {
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if (sampler == -1) {
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return;
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}
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glUniform1i(sampler, 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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bool
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GLXFBEvaluator::EvalStencils(
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GLuint srcBuffer, BufferDescriptor const &srcDesc,
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GLuint dstBuffer, BufferDescriptor const &dstDesc,
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GLuint duBuffer, BufferDescriptor const &duDesc,
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GLuint dvBuffer, BufferDescriptor const &dvDesc,
|
|
GLuint sizesBuffer,
|
|
GLuint offsetsBuffer,
|
|
GLuint indicesBuffer,
|
|
GLuint weightsBuffer,
|
|
GLuint duWeightsBuffer,
|
|
GLuint dvWeightsBuffer,
|
|
int start, int end) const {
|
|
|
|
return EvalStencils(srcBuffer, srcDesc,
|
|
dstBuffer, dstDesc,
|
|
duBuffer, duDesc,
|
|
dvBuffer, dvDesc,
|
|
0, BufferDescriptor(),
|
|
0, BufferDescriptor(),
|
|
0, BufferDescriptor(),
|
|
sizesBuffer, offsetsBuffer, indicesBuffer,
|
|
weightsBuffer,
|
|
duWeightsBuffer, dvWeightsBuffer,
|
|
0, 0, 0,
|
|
start, end);
|
|
}
|
|
|
|
bool
|
|
GLXFBEvaluator::EvalStencils(
|
|
GLuint srcBuffer, BufferDescriptor const &srcDesc,
|
|
GLuint dstBuffer, BufferDescriptor const &dstDesc,
|
|
GLuint duBuffer, BufferDescriptor const &duDesc,
|
|
GLuint dvBuffer, BufferDescriptor const &dvDesc,
|
|
GLuint duuBuffer, BufferDescriptor const &duuDesc,
|
|
GLuint duvBuffer, BufferDescriptor const &duvDesc,
|
|
GLuint dvvBuffer, BufferDescriptor const &dvvDesc,
|
|
GLuint sizesTexture,
|
|
GLuint offsetsTexture,
|
|
GLuint indicesTexture,
|
|
GLuint weightsTexture,
|
|
GLuint duWeightsTexture,
|
|
GLuint dvWeightsTexture,
|
|
GLuint duuWeightsTexture,
|
|
GLuint duvWeightsTexture,
|
|
GLuint dvvWeightsTexture,
|
|
int start, int end) const {
|
|
|
|
if (!_stencilKernel.program) return false;
|
|
int count = end - start;
|
|
if (count <= 0) {
|
|
return true;
|
|
}
|
|
|
|
// bind vertex array
|
|
// always create new one, to be safe with multiple contexts (slow though)
|
|
GLuint vao = 0;
|
|
glGenVertexArrays(1, &vao);
|
|
glBindVertexArray(vao);
|
|
|
|
glEnable(GL_RASTERIZER_DISCARD);
|
|
glUseProgram(_stencilKernel.program);
|
|
|
|
// Set input VBO as a texture buffer.
|
|
glBindTexture(GL_TEXTURE_BUFFER, _srcBufferTexture);
|
|
glTexBuffer(GL_TEXTURE_BUFFER, GL_R32F, srcBuffer);
|
|
glBindTexture(GL_TEXTURE_BUFFER, 0);
|
|
|
|
bindTexture(_stencilKernel.uniformSrcBufferTexture, _srcBufferTexture, 0);
|
|
|
|
// bind stencil table textures.
|
|
bindTexture(_stencilKernel.uniformSizesTexture, sizesTexture, 1);
|
|
bindTexture(_stencilKernel.uniformOffsetsTexture, offsetsTexture, 2);
|
|
bindTexture(_stencilKernel.uniformIndicesTexture, indicesTexture, 3);
|
|
bindTexture(_stencilKernel.uniformWeightsTexture, weightsTexture, 4);
|
|
if (_stencilKernel.uniformDuWeightsTexture >= 0 && duWeightsTexture)
|
|
bindTexture(_stencilKernel.uniformDuWeightsTexture, duWeightsTexture, 5);
|
|
if (_stencilKernel.uniformDvWeightsTexture >= 0 && dvWeightsTexture)
|
|
bindTexture(_stencilKernel.uniformDvWeightsTexture, dvWeightsTexture, 6);
|
|
if (_stencilKernel.uniformDuuWeightsTexture >= 0 && duuWeightsTexture)
|
|
bindTexture(_stencilKernel.uniformDuuWeightsTexture, duuWeightsTexture, 7);
|
|
if (_stencilKernel.uniformDuvWeightsTexture >= 0 && duvWeightsTexture)
|
|
bindTexture(_stencilKernel.uniformDuvWeightsTexture, duvWeightsTexture, 8);
|
|
if (_stencilKernel.uniformDvvWeightsTexture >= 0 && dvvWeightsTexture)
|
|
bindTexture(_stencilKernel.uniformDvvWeightsTexture, dvvWeightsTexture, 9);
|
|
|
|
// set batch range
|
|
glUniform1i(_stencilKernel.uniformStart, start);
|
|
glUniform1i(_stencilKernel.uniformEnd, end);
|
|
glUniform1i(_stencilKernel.uniformSrcOffset, srcDesc.offset);
|
|
|
|
// The destination buffer is bound at vertex boundary.
|
|
//
|
|
// Example: When we have a batched and interleaved vertex buffer
|
|
//
|
|
// Obj X | Obj Y |
|
|
// -----------+-------------------------------------------+-------
|
|
// | vtx 0 | vtx 1 | |
|
|
// -----------+---------------+---------------+-----------+-------
|
|
// | x y z r g b a | x y z r g b a | .... |
|
|
// -----------+---------------+---------------+-----------+-------
|
|
// ^
|
|
// srcDesc.offset for Obj Y color
|
|
//
|
|
// ^-------------------------------------------^
|
|
// XFB destination buffer range
|
|
// S S S * * * *
|
|
// k k k
|
|
// i i i
|
|
// p p p
|
|
//
|
|
// We use gl_SkipComponents to skip the first 3 XYZ so the
|
|
// buffer itself needs to be bound for entire section of ObjY.
|
|
//
|
|
// Note that for the source buffer (texture) we bind the whole
|
|
// buffer (all VBO range) and use srcOffset=srcDesc.offset for
|
|
// indexing.
|
|
//
|
|
int dstBufferBindOffset = dstDesc.stride ?
|
|
(dstDesc.offset - (dstDesc.offset % dstDesc.stride)) : 0;
|
|
int duBufferBindOffset = duDesc.stride ?
|
|
(duDesc.offset - (duDesc.offset % duDesc.stride)) : 0;
|
|
int dvBufferBindOffset = dvDesc.stride ?
|
|
(dvDesc.offset - (dvDesc.offset % dvDesc.stride)) : 0;
|
|
int duuBufferBindOffset = duuDesc.stride ?
|
|
(duuDesc.offset - (duuDesc.offset % duuDesc.stride)) : 0;
|
|
int duvBufferBindOffset = duvDesc.stride ?
|
|
(duvDesc.offset - (duvDesc.offset % duvDesc.stride)) : 0;
|
|
int dvvBufferBindOffset = dvvDesc.stride ?
|
|
(dvvDesc.offset - (dvvDesc.offset % dvvDesc.stride)) : 0;
|
|
|
|
// bind destination buffer
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
0, dstBuffer,
|
|
dstBufferBindOffset * sizeof(float),
|
|
count * dstDesc.stride * sizeof(float));
|
|
|
|
if ((duDesc.length > 0) && _interleavedDerivativeBuffers) {
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
1, duBuffer,
|
|
duBufferBindOffset * sizeof(float),
|
|
count * duDesc.stride * sizeof(float));
|
|
} else {
|
|
if (duDesc.length > 0) {
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
1, duBuffer,
|
|
duBufferBindOffset * sizeof(float),
|
|
count * duDesc.stride * sizeof(float));
|
|
}
|
|
|
|
if (dvDesc.length > 0) {
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
2, dvBuffer,
|
|
dvBufferBindOffset * sizeof(float),
|
|
count * dvDesc.stride * sizeof(float));
|
|
}
|
|
}
|
|
|
|
if ((duuDesc.length > 0) && _interleavedDerivativeBuffers) {
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
2, duuBuffer,
|
|
duuBufferBindOffset * sizeof(float),
|
|
count * duuDesc.stride * sizeof(float));
|
|
} else {
|
|
if (duuDesc.length > 0) {
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
3, duuBuffer,
|
|
duuBufferBindOffset * sizeof(float),
|
|
count * duuDesc.stride * sizeof(float));
|
|
}
|
|
|
|
if (duvDesc.length > 0) {
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
4, duvBuffer,
|
|
duvBufferBindOffset * sizeof(float),
|
|
count * duvDesc.stride * sizeof(float));
|
|
}
|
|
|
|
if (dvvDesc.length > 0) {
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
5, dvvBuffer,
|
|
dvvBufferBindOffset * sizeof(float),
|
|
count * dvvDesc.stride * sizeof(float));
|
|
}
|
|
}
|
|
|
|
glBeginTransformFeedback(GL_POINTS);
|
|
glDrawArrays(GL_POINTS, 0, count);
|
|
glEndTransformFeedback();
|
|
|
|
glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, 0);
|
|
|
|
for (int i = 0; i < 6; ++i) {
|
|
glActiveTexture(GL_TEXTURE0 + i);
|
|
glBindTexture(GL_TEXTURE_BUFFER, 0);
|
|
}
|
|
|
|
glDisable(GL_RASTERIZER_DISCARD);
|
|
glUseProgram(0);
|
|
glActiveTexture(GL_TEXTURE0);
|
|
|
|
// revert vao
|
|
glBindVertexArray(0);
|
|
glDeleteVertexArrays(1, &vao);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
bool
|
|
GLXFBEvaluator::EvalPatches(
|
|
GLuint srcBuffer, BufferDescriptor const &srcDesc,
|
|
GLuint dstBuffer, BufferDescriptor const &dstDesc,
|
|
GLuint duBuffer, BufferDescriptor const &duDesc,
|
|
GLuint dvBuffer, BufferDescriptor const &dvDesc,
|
|
int numPatchCoords,
|
|
GLuint patchCoordsBuffer,
|
|
const PatchArrayVector &patchArrays,
|
|
GLuint patchIndexTexture,
|
|
GLuint patchParamTexture) const {
|
|
|
|
return EvalPatches(srcBuffer, srcDesc,
|
|
dstBuffer, dstDesc,
|
|
duBuffer, duDesc,
|
|
dvBuffer, dvDesc,
|
|
0, BufferDescriptor(),
|
|
0, BufferDescriptor(),
|
|
0, BufferDescriptor(),
|
|
numPatchCoords,
|
|
patchCoordsBuffer, patchArrays,
|
|
patchIndexTexture,
|
|
patchParamTexture);
|
|
}
|
|
|
|
bool
|
|
GLXFBEvaluator::EvalPatches(
|
|
GLuint srcBuffer, BufferDescriptor const &srcDesc,
|
|
GLuint dstBuffer, BufferDescriptor const &dstDesc,
|
|
GLuint duBuffer, BufferDescriptor const &duDesc,
|
|
GLuint dvBuffer, BufferDescriptor const &dvDesc,
|
|
GLuint duuBuffer, BufferDescriptor const &duuDesc,
|
|
GLuint duvBuffer, BufferDescriptor const &duvDesc,
|
|
GLuint dvvBuffer, BufferDescriptor const &dvvDesc,
|
|
int numPatchCoords,
|
|
GLuint patchCoordsBuffer,
|
|
const PatchArrayVector &patchArrays,
|
|
GLuint patchIndexTexture,
|
|
GLuint patchParamTexture) const {
|
|
|
|
bool deriv1 = (duDesc.length > 0 || dvDesc.length > 0);
|
|
bool deriv2 = (duuDesc.length > 0 || duvDesc.length > 0 || dvvDesc.length > 0);
|
|
|
|
if (!_patchKernel.program) return false;
|
|
|
|
// bind vertex array
|
|
// always create new one, to be safe with multiple contexts (slow though)
|
|
GLuint vao = 0;
|
|
glGenVertexArrays(1, &vao);
|
|
glBindVertexArray(vao);
|
|
|
|
glEnable(GL_RASTERIZER_DISCARD);
|
|
glUseProgram(_patchKernel.program);
|
|
|
|
// Set input VBO as a texture buffer.
|
|
glBindTexture(GL_TEXTURE_BUFFER, _srcBufferTexture);
|
|
glTexBuffer(GL_TEXTURE_BUFFER, GL_R32F, srcBuffer);
|
|
glBindTexture(GL_TEXTURE_BUFFER, 0);
|
|
|
|
bindTexture(_patchKernel.uniformSrcBufferTexture, _srcBufferTexture, 0);
|
|
|
|
// bind patch index and patch param textures.
|
|
bindTexture(_patchKernel.uniformPatchParamTexture, patchParamTexture, 1);
|
|
bindTexture(_patchKernel.uniformPatchIndexTexture, patchIndexTexture, 2);
|
|
|
|
// set other uniforms
|
|
glUniform4iv(_patchKernel.uniformPatchArray, (int)patchArrays.size(),
|
|
(const GLint*)&patchArrays[0]);
|
|
glUniform1i(_patchKernel.uniformSrcOffset, srcDesc.offset);
|
|
|
|
// input patchcoords
|
|
glEnableVertexAttribArray(0);
|
|
glEnableVertexAttribArray(1);
|
|
int stride = sizeof(int) * 5; // patchcoord = int*5 struct
|
|
glBindBuffer(GL_ARRAY_BUFFER, patchCoordsBuffer);
|
|
glVertexAttribIPointer(0, 3, GL_UNSIGNED_INT, stride, (void*)0);
|
|
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, stride, (void*)(sizeof(int)*3));
|
|
|
|
int dstBufferBindOffset =
|
|
dstDesc.offset - (dstDesc.offset % dstDesc.stride);
|
|
int duBufferBindOffset = duDesc.stride
|
|
? (duDesc.offset - (duDesc.offset % duDesc.stride))
|
|
: 0;
|
|
int dvBufferBindOffset = dvDesc.stride
|
|
? (dvDesc.offset - (dvDesc.offset % dvDesc.stride))
|
|
: 0;
|
|
int duuBufferBindOffset = duuDesc.stride
|
|
? (duuDesc.offset - (duuDesc.offset % duuDesc.stride))
|
|
: 0;
|
|
int duvBufferBindOffset = duvDesc.stride
|
|
? (duvDesc.offset - (duvDesc.offset % duvDesc.stride))
|
|
: 0;
|
|
int dvvBufferBindOffset = dvvDesc.stride
|
|
? (dvvDesc.offset - (dvvDesc.offset % dvvDesc.stride))
|
|
: 0;
|
|
|
|
// bind destination buffer
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
0, dstBuffer,
|
|
dstBufferBindOffset * sizeof(float),
|
|
numPatchCoords * dstDesc.stride * sizeof(float));
|
|
|
|
if (deriv1 && _interleavedDerivativeBuffers) {
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
1, duBuffer,
|
|
duBufferBindOffset * sizeof(float),
|
|
numPatchCoords * duDesc.stride * sizeof(float));
|
|
} else if (deriv1) {
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
1, duBuffer,
|
|
duBufferBindOffset * sizeof(float),
|
|
numPatchCoords * duDesc.stride * sizeof(float));
|
|
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
2, dvBuffer,
|
|
dvBufferBindOffset * sizeof(float),
|
|
numPatchCoords * dvDesc.stride * sizeof(float));
|
|
}
|
|
if (deriv2 && _interleavedDerivativeBuffers) {
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
2, duuBuffer,
|
|
duuBufferBindOffset * sizeof(float),
|
|
numPatchCoords * duuDesc.stride * sizeof(float));
|
|
} else if (deriv2) {
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
3, duuBuffer,
|
|
duuBufferBindOffset * sizeof(float),
|
|
numPatchCoords * duuDesc.stride * sizeof(float));
|
|
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
4, duvBuffer,
|
|
duvBufferBindOffset * sizeof(float),
|
|
numPatchCoords * duvDesc.stride * sizeof(float));
|
|
|
|
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
|
|
5, dvvBuffer,
|
|
dvvBufferBindOffset * sizeof(float),
|
|
numPatchCoords * dvvDesc.stride * sizeof(float));
|
|
}
|
|
|
|
glBeginTransformFeedback(GL_POINTS);
|
|
glDrawArrays(GL_POINTS, 0, numPatchCoords);
|
|
glEndTransformFeedback();
|
|
|
|
glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, 0);
|
|
|
|
// unbind textures
|
|
for (int i = 0; i < 6; ++i) {
|
|
glActiveTexture(GL_TEXTURE0 + i);
|
|
glBindTexture(GL_TEXTURE_BUFFER, 0);
|
|
}
|
|
|
|
glDisable(GL_RASTERIZER_DISCARD);
|
|
glUseProgram(0);
|
|
glActiveTexture(GL_TEXTURE0);
|
|
|
|
glDisableVertexAttribArray(0);
|
|
glDisableVertexAttribArray(1);
|
|
|
|
// revert vao
|
|
glBindVertexArray(0);
|
|
glDeleteVertexArrays(1, &vao);
|
|
|
|
return true;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
GLXFBEvaluator::_StencilKernel::_StencilKernel() : program(0) {
|
|
}
|
|
GLXFBEvaluator::_StencilKernel::~_StencilKernel() {
|
|
if (program) {
|
|
glDeleteProgram(program);
|
|
}
|
|
}
|
|
|
|
bool
|
|
GLXFBEvaluator::_StencilKernel::Compile(BufferDescriptor const &srcDesc,
|
|
BufferDescriptor const &dstDesc,
|
|
BufferDescriptor const &duDesc,
|
|
BufferDescriptor const &dvDesc,
|
|
BufferDescriptor const &duuDesc,
|
|
BufferDescriptor const &duvDesc,
|
|
BufferDescriptor const &dvvDesc,
|
|
bool interleavedDerivativeBuffers) {
|
|
// create stencil kernel
|
|
if (program) {
|
|
glDeleteProgram(program);
|
|
}
|
|
|
|
const char * kernelDefines =
|
|
"#define OPENSUBDIV_GLSL_XFB_KERNEL_EVAL_STENCILS\n";
|
|
|
|
program = compileKernel(srcDesc, dstDesc, duDesc, dvDesc,
|
|
duuDesc, duvDesc, dvvDesc,
|
|
kernelDefines, interleavedDerivativeBuffers);
|
|
if (program == 0) return false;
|
|
|
|
// cache uniform locations (TODO: use uniform block)
|
|
uniformSrcBufferTexture = glGetUniformLocation(program, "vertexBuffer");
|
|
uniformSrcOffset = glGetUniformLocation(program, "srcOffset");
|
|
uniformSizesTexture = glGetUniformLocation(program, "sizes");
|
|
uniformOffsetsTexture = glGetUniformLocation(program, "offsets");
|
|
uniformIndicesTexture = glGetUniformLocation(program, "indices");
|
|
uniformWeightsTexture = glGetUniformLocation(program, "weights");
|
|
uniformDuWeightsTexture = glGetUniformLocation(program, "duWeights");
|
|
uniformDvWeightsTexture = glGetUniformLocation(program, "dvWeights");
|
|
uniformDuuWeightsTexture = glGetUniformLocation(program, "duuWeights");
|
|
uniformDuvWeightsTexture = glGetUniformLocation(program, "duvWeights");
|
|
uniformDvvWeightsTexture = glGetUniformLocation(program, "dvvWeights");
|
|
uniformStart = glGetUniformLocation(program, "batchStart");
|
|
uniformEnd = glGetUniformLocation(program, "batchEnd");
|
|
|
|
return true;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
GLXFBEvaluator::_PatchKernel::_PatchKernel() : program(0) {
|
|
}
|
|
GLXFBEvaluator::_PatchKernel::~_PatchKernel() {
|
|
if (program) {
|
|
glDeleteProgram(program);
|
|
}
|
|
}
|
|
|
|
bool
|
|
GLXFBEvaluator::_PatchKernel::Compile(BufferDescriptor const &srcDesc,
|
|
BufferDescriptor const &dstDesc,
|
|
BufferDescriptor const &duDesc,
|
|
BufferDescriptor const &dvDesc,
|
|
BufferDescriptor const &duuDesc,
|
|
BufferDescriptor const &duvDesc,
|
|
BufferDescriptor const &dvvDesc,
|
|
bool interleavedDerivativeBuffers) {
|
|
// create stencil kernel
|
|
if (program) {
|
|
glDeleteProgram(program);
|
|
}
|
|
|
|
const char * kernelDefines =
|
|
"#define OPENSUBDIV_GLSL_XFB_KERNEL_EVAL_PATCHES\n";
|
|
|
|
program = compileKernel(srcDesc, dstDesc, duDesc, dvDesc,
|
|
duuDesc, duvDesc, dvvDesc,
|
|
kernelDefines, interleavedDerivativeBuffers);
|
|
if (program == 0) return false;
|
|
|
|
// cache uniform locations
|
|
uniformSrcBufferTexture = glGetUniformLocation(program, "vertexBuffer");
|
|
uniformSrcOffset = glGetUniformLocation(program, "srcOffset");
|
|
uniformPatchArray = glGetUniformLocation(program, "patchArray");
|
|
uniformPatchParamTexture = glGetUniformLocation(program, "patchParamBuffer");
|
|
uniformPatchIndexTexture = glGetUniformLocation(program, "patchIndexBuffer");
|
|
|
|
return true;
|
|
}
|
|
|
|
} // end namespace Osd
|
|
|
|
} // end namespace OPENSUBDIV_VERSION
|
|
} // end namespace OpenSubdiv
|