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OpenSubdiv/examples/mayaPtexViewer/OpenSubdivPtexShaderOverride.cpp
Takahito Tejima 51a45b598d Updating EULA
2013-07-18 14:19:50 -07:00

503 lines
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//
// Copyright 2013 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License
// and the following modification to it: Section 6 Trademarks.
// 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 for reproducing
// the content of the NOTICE file.
//
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
// either express or implied. See the License for the specific
// language governing permissions and limitations under the
// License.
//
#if not defined(__APPLE__)
#include <GL/glew.h>
#if defined(WIN32)
#include <GL/wglew.h>
#endif
#endif
// Include this first to avoid winsock2.h problems on Windows:
#include <maya/MTypes.h>
#include <maya/MFnPlugin.h>
#include <maya/MFnPluginData.h>
#include <maya/MFnMesh.h>
#include <maya/MItMeshPolygon.h>
#include <maya/MIntArray.h>
#include <maya/MUintArray.h>
#include <maya/MPointArray.h>
#include <maya/MNodeMessage.h>
#include <maya/MShaderManager.h>
#include <maya/MViewport2Renderer.h>
#include <maya/MDrawRegistry.h>
#include <maya/MDrawContext.h>
#include <maya/MHWShaderSwatchGenerator.h>
#include <maya/MPxVertexBufferGenerator.h>
#include <maya/MStateManager.h>
#include "../common/maya_util.h" // for CHECK_GL_ERROR
#include "OpenSubdivPtexShaderOverride.h"
#include "OpenSubdivPtexShader.h"
#include "osdPtexMeshData.h"
using MHWRender::MVertexBuffer;
using MHWRender::MVertexBufferDescriptor;
using MHWRender::MDepthStencilState;
using MHWRender::MDepthStencilStateDesc;
using MHWRender::MBlendState;
using MHWRender::MBlendStateDesc;
using MHWRender::MComponentDataIndexing;
#if MAYA_API_VERSION >= 201350
using MHWRender::MVertexBufferArray;
#endif
#include <osd/cpuComputeController.h>
OpenSubdiv::OsdCpuComputeController *g_cpuComputeController = 0;
#ifdef OPENSUBDIV_HAS_OPENMP
#include <osd/ompComputeController.h>
OpenSubdiv::OsdOmpComputeController *g_ompComputeController = 0;
#endif
#ifdef OPENSUBDIV_HAS_OPENCL
#include <osd/clComputeController.h>
cl_context g_clContext;
cl_command_queue g_clQueue;
#include "../common/clInit.h"
OpenSubdiv::OsdCLComputeController *g_clComputeController = 0;
#endif
#ifdef OPENSUBDIV_HAS_CUDA
#include <osd/cudaComputeController.h>
extern void cudaInit();
OpenSubdiv::OsdCudaComputeController *g_cudaComputeController = 0;
#endif
OpenSubdivPtexShaderOverride::OpenSubdivPtexShaderOverride(const MObject &obj)
: MHWRender::MPxShaderOverride(obj),
_shader(NULL)
{
}
OpenSubdivPtexShaderOverride::~OpenSubdivPtexShaderOverride()
{
MMessage::removeCallbacks(_callbackIds);
}
MHWRender::MPxShaderOverride*
OpenSubdivPtexShaderOverride::creator(const MObject &obj)
{
return new OpenSubdivPtexShaderOverride(obj);
}
//
// attrChangedCB
//
// Informs us whenever an attribute on the shape node changes.
// Overkill since we really only want to know if the topology changes
// (e.g. an edge crease is added or changed) but Maya doesn't give us
// access to a callback that fine-grained.
// MMessage::PolyTopologyChangedCallback sounds promising but only
// calls back on a single change for any edit (i.e. not while dragging).
//
/*static*/
void
OpenSubdivPtexShaderOverride::attrChangedCB(MNodeMessage::AttributeMessage msg, MPlug & plug,
MPlug & otherPlug, void* clientData)
{
// We only care if the plug is outMesh and the action is "evaluate"
if ( msg & MNodeMessage::kAttributeEval ) {
OsdPtexMeshData *meshData = (OsdPtexMeshData*)clientData;
MFnDependencyNode depNodeFn(meshData->getDagPath().node());
if ( plug == depNodeFn.attribute("outMesh")) {
meshData->setMeshTopoDirty();
}
}
}
void
OpenSubdivPtexShaderOverride::addTopologyChangedCallbacks( const MDagPath& dagPath, OsdPtexMeshData *data )
{
MStatus status = MS::kSuccess;
// Extract shape node and add callback to let us know when an attribute changes
MDagPath meshDagPath = dagPath;
meshDagPath.extendToShape();
MObject shapeNode = meshDagPath.node();
MCallbackId id = MNodeMessage::addAttributeChangedCallback(shapeNode,
attrChangedCB, data, &status );
if ( status ) {
_callbackIds.append( id );
} else {
cerr << "MNodeMessage.addCallback failed" << endl;
}
}
MString
OpenSubdivPtexShaderOverride::initialize(const MInitContext &initContext,
MInitFeedback &initFeedback)
{
MString empty;
// Roundabout way of getting positions pulled into our OsdBufferGenerator
// where we can manage the VBO memory size.
// Needs to be re-visited, re-factored, optimized, etc.
{
MHWRender::MVertexBufferDescriptor positionDesc(
empty,
MHWRender::MGeometry::kPosition,
MHWRender::MGeometry::kFloat,
3);
addGeometryRequirement(positionDesc);
}
{
MHWRender::MVertexBufferDescriptor positionDesc(
"osdPosition",
MHWRender::MGeometry::kTangent,
MHWRender::MGeometry::kFloat,
3);
positionDesc.setSemanticName("osdPosition");
addGeometryRequirement(positionDesc);
MHWRender::MVertexBufferDescriptor normalDesc(
"osdNormal",
MHWRender::MGeometry::kBitangent,
MHWRender::MGeometry::kFloat,
3);
normalDesc.setSemanticName("osdNormal");
addGeometryRequirement(normalDesc);
}
if (initFeedback.customData == NULL) {
OsdPtexMeshData *data = new OsdPtexMeshData(initContext.dagPath);
initFeedback.customData = data;
}
// Add a Maya callback so we can rebuild HBR mesh if topology changes
addTopologyChangedCallbacks( initContext.dagPath, (OsdPtexMeshData*)initFeedback.customData );
return MString("OpenSubdivPtexShaderOverride");
}
void
OpenSubdivPtexShaderOverride::updateDG(MObject object)
{
if (object == MObject::kNullObj)
return;
_shader = static_cast<OpenSubdivPtexShader*>(
MPxHwShaderNode::getHwShaderNodePtr(object));
if (_shader) {
_shader->updateAttributes();
}
}
void
OpenSubdivPtexShaderOverride::updateDevice()
{
// only place to access GPU device safely
}
void
OpenSubdivPtexShaderOverride::endUpdate()
{
}
bool
OpenSubdivPtexShaderOverride::draw(
MHWRender::MDrawContext &context,
const MHWRender::MRenderItemList &renderItemList) const
{
{
MHWRender::MStateManager *stateMgr = context.getStateManager();
static const MDepthStencilState * depthState = NULL;
if (!depthState) {
MDepthStencilStateDesc desc;
depthState = stateMgr->acquireDepthStencilState(desc);
}
static const MBlendState *blendState = NULL;
if (!blendState) {
MBlendStateDesc desc;
int ntargets = desc.independentBlendEnable ?
MHWRender::MBlendState::kMaxTargets : 1;
for (int i = 0; i < ntargets; ++i) {
desc.targetBlends[i].blendEnable = false;
}
blendState = stateMgr->acquireBlendState(desc);
}
stateMgr->setDepthStencilState(depthState);
stateMgr->setBlendState(blendState);
}
for (int i = 0; i < renderItemList.length(); i++)
{
const MHWRender::MRenderItem *renderItem = renderItemList.itemAt(i);
OsdPtexMeshData *data =
static_cast<OsdPtexMeshData*>(renderItem->customData());
if (data == NULL) {
return false;
}
// pass attribute values into osdPtexMeshData
data->rebuildHbrMeshIfNeeded(_shader);
const MHWRender::MVertexBuffer *position = NULL, *normal = NULL;
{
const MHWRender::MGeometry *geometry = renderItem->geometry();
for (int i = 0; i < geometry->vertexBufferCount(); i++) {
const MHWRender::MVertexBuffer *vb = geometry->vertexBuffer(i);
const MHWRender::MVertexBufferDescriptor &vdesc = vb->descriptor();
if (vdesc.name() == "osdPosition")
position = vb;
else if (vdesc.name() == "osdNormal")
normal = vb;
}
}
// draw meshdata
data->prepare();
data->updateGeometry(position, normal);
_shader->draw(context, data);
}
return true;
}
// -----------------------------------------------------------------------------
class OsdBufferGenerator : public MHWRender::MPxVertexBufferGenerator
{
public:
OsdBufferGenerator(bool normal) : _normal(normal) {}
virtual ~OsdBufferGenerator() {}
#if MAYA_API_VERSION >= 201400
virtual bool getSourceIndexing(
const MObject &object,
MHWRender::MComponentDataIndexing &sourceIndexing) const
{
MStatus status;
MFnMesh mesh(object, &status);
#else
virtual bool getSourceIndexing(
const MDagPath &dagPath,
MHWRender::MComponentDataIndexing &sourceIndexing) const
{
MStatus status;
MFnMesh mesh(dagPath.node(), &status);
#endif
if (!status) return false;
MIntArray vertexCount, vertexList;
mesh.getVertices(vertexCount, vertexList);
MUintArray &vertices = sourceIndexing.indices();
for (unsigned int i = 0; i < vertexList.length(); ++i)
vertices.append((unsigned int)vertexList[i]);
sourceIndexing.setComponentType(MComponentDataIndexing::kFaceVertex);
return true;
}
#if MAYA_API_VERSION >= 201400
virtual bool getSourceStreams(const MObject &object,
MStringArray &) const
#else
virtual bool getSourceStreams(const MDagPath &dagPath,
MStringArray &) const
#endif
{
return false;
}
#if MAYA_API_VERSION >= 201350
virtual void createVertexStream(
#if MAYA_API_VERSION >= 201400
const MObject &object,
#else
const MDagPath &dagPath,
#endif
MVertexBuffer &vertexBuffer,
const MComponentDataIndexing &targetIndexing,
const MComponentDataIndexing &,
const MVertexBufferArray &) const
{
#else
virtual void createVertexStream(
const MDagPath &dagPath, MVertexBuffer &vertexBuffer,
const MComponentDataIndexing &targetIndexing) const
{
#endif
#if MAYA_API_VERSION >= 201400
MFnMesh meshFn(object);
#else
MFnMesh meshFn(dagPath);
#endif
int nVertices = meshFn.numVertices();
#if MAYA_API_VERSION >= 201350
float *buffer = static_cast<float*>(vertexBuffer.acquire(nVertices, true));
#else
float *buffer = static_cast<float*>(vertexBuffer.acquire(nVertices));
#endif
float *dst = buffer;
if (_normal) {
MFloatVectorArray normals;
meshFn.getVertexNormals(true, normals);
for (int i = 0; i < nVertices; ++i) {
*dst++ = normals[i].x;
*dst++ = normals[i].y;
*dst++ = normals[i].z;
}
} else {
MFloatPointArray points;
meshFn.getPoints(points);
for (int i = 0; i < nVertices; ++i) {
*dst++ = points[i].x;
*dst++ = points[i].y;
*dst++ = points[i].z;
}
}
vertexBuffer.commit(buffer);
}
static MPxVertexBufferGenerator *positionBufferCreator()
{
return new OsdBufferGenerator(/*normal = */false);
}
static MPxVertexBufferGenerator *normalBufferCreator()
{
return new OsdBufferGenerator(/*normal = */true);
}
private:
bool _normal;
};
//---------------------------------------------------------------------------
// Plugin Registration
//---------------------------------------------------------------------------
MStatus
initializePlugin(MObject obj)
{
MStatus status;
MFnPlugin plugin(obj, "Pixar", "3.0", "Any"); // vendor,version,apiversion
MString swatchName = MHWShaderSwatchGenerator::initialize();
MString userClassify("shader/surface/utility/:"
"drawdb/shader/surface/OpenSubdivPtexShader:"
"swatch/"+swatchName);
glewInit();
g_cpuComputeController = new OpenSubdiv::OsdCpuComputeController();
#ifdef OPENSUBDIV_HAS_OPENMP
g_ompComputeController = new OpenSubdiv::OsdOmpComputeController();
#endif
#ifdef OPENSUBDIV_HAS_CUDA
cudaInit();
g_cudaComputeController = new OpenSubdiv::OsdCudaComputeController();
#endif
#ifdef OPENSUBDIV_HAS_OPENCL
if (initCL(&g_clContext, &g_clQueue) == false) {
// XXX
printf("Error in initializing OpenCL\n");
exit(1);
}
g_clComputeController = new OpenSubdiv::OsdCLComputeController(g_clContext,
g_clQueue);
#endif
// shader node
status = plugin.registerNode("openSubdivPtexShader",
OpenSubdivPtexShader::id,
&OpenSubdivPtexShader::creator,
&OpenSubdivPtexShader::initialize,
MPxNode::kHwShaderNode,
&userClassify);
MHWRender::MDrawRegistry::registerVertexBufferGenerator(
"osdPosition", OsdBufferGenerator::positionBufferCreator);
MHWRender::MDrawRegistry::registerVertexBufferGenerator(
"osdNormal", OsdBufferGenerator::normalBufferCreator);
// shaderoverride
status = MHWRender::MDrawRegistry::registerShaderOverrideCreator(
"drawdb/shader/surface/OpenSubdivPtexShader",
OpenSubdivPtexShader::drawRegistrantId,
OpenSubdivPtexShaderOverride::creator);
return status;
}
MStatus
uninitializePlugin(MObject obj)
{
MFnPlugin plugin(obj);
MStatus status;
status = plugin.deregisterNode(OpenSubdivPtexShader::id);
MHWRender::MDrawRegistry::deregisterVertexBufferGenerator("osdPosition");
MHWRender::MDrawRegistry::deregisterVertexBufferGenerator("osdNormal");
status = MHWRender::MDrawRegistry::deregisterShaderOverrideCreator(
"drawdb/shader/surface/OpenSubdivPtexShader",
OpenSubdivPtexShader::drawRegistrantId);
delete g_cpuComputeController;
#ifdef OPENSUBDIV_HAS_OPENMP
delete g_ompComputeController;
#endif
#ifdef OPENSUBDIV_HAS_CUDA
delete g_cudaComputeController;
#endif
#ifdef OPENSUBDIV_HAS_OPENCL
delete g_clComputeController;
#endif
return status;
}
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