HdTaskSharedPtrVector
UsdMayaGLBatchRenderer::TaskDelegate::GetSetupTasks()
{
HdTaskSharedPtrVector tasks;
// lighting
tasks.push_back(GetRenderIndex().GetTask(_simpleLightTaskId));
return tasks;
}
void
My_TestGLDrawing::
DrawScene(PickParam const * pickParam)
{
int width = GetWidth(), height = GetHeight();
GfMatrix4d viewMatrix = GetViewMatrix();
GfFrustum frustum = GetFrustum();
GfVec4d viewport(0, 0, width, height);
if (pickParam) {
frustum = frustum.ComputeNarrowedFrustum(
GfVec2d((2.0 * pickParam->location[0]) / width - 1.0,
(2.0 * (height-pickParam->location[1])) / height - 1.0),
GfVec2d(1.0 / width, 1.0 / height));
viewport = pickParam->viewport;
}
GfMatrix4d projMatrix = frustum.ComputeProjectionMatrix();
_delegate->SetCamera(viewMatrix, projMatrix);
glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
HdTaskSharedPtrVector tasks;
SdfPath renderSetupTask("/renderSetupTask");
SdfPath renderTask("/renderTask");
tasks.push_back(_delegate->GetRenderIndex().GetTask(renderSetupTask));
tasks.push_back(_delegate->GetRenderIndex().GetTask(renderTask));
HdxRenderTaskParams param
= _delegate->GetTaskParam(
renderSetupTask, HdTokens->params).Get<HdxRenderTaskParams>();
param.enableIdRender = (pickParam != NULL);
param.viewport = viewport;
_delegate->SetTaskParam(renderSetupTask, HdTokens->params, VtValue(param));
glEnable(GL_DEPTH_TEST);
glBindVertexArray(vao);
_engine.Execute(_delegate->GetRenderIndex(), tasks);
glBindVertexArray(0);
}
void
My_TestGLDrawing::DrawScene()
{
_Clear();
int width = GetWidth(), height = GetHeight();
GfMatrix4d viewMatrix = GetViewMatrix();
GfFrustum frustum = GetFrustum();
GfVec4d viewport(0, 0, width, height);
GfMatrix4d projMatrix = frustum.ComputeProjectionMatrix();
_delegate->SetCamera(viewMatrix, projMatrix);
glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
SdfPath renderSetupTask("/renderSetupTask");
SdfPath renderTask("/renderTask");
SdfPath selectionTask("/selectionTask");
// viewport
HdxRenderTaskParams param
= _delegate->GetTaskParam(
renderSetupTask, HdTokens->params).Get<HdxRenderTaskParams>();
param.viewport = viewport;
_delegate->SetTaskParam(renderSetupTask, HdTokens->params, VtValue(param));
HdTaskSharedPtrVector tasks;
tasks.push_back(_delegate->GetRenderIndex().GetTask(renderSetupTask));
tasks.push_back(_delegate->GetRenderIndex().GetTask(renderTask));
tasks.push_back(_delegate->GetRenderIndex().GetTask(selectionTask));
glEnable(GL_DEPTH_TEST);
glBindVertexArray(vao);
VtValue v(_picker.GetSelectionTracker());
_engine.SetTaskContextData(HdxTokens->selectionState, v);
_engine.Execute(_delegate->GetRenderIndex(), tasks);
glBindVertexArray(0);
}
bool
HdxIntersector::Query(HdxIntersector::Params const& params,
HdRprimCollection const& col,
HdEngine* engine,
HdxIntersector::Result* result)
{
TRACE_FUNCTION();
// Make sure we're in a sane GL state before attempting anything.
if (GlfHasLegacyGraphics()) {
TF_RUNTIME_ERROR("framebuffer object not supported");
return false;
}
GlfGLContextSharedPtr context = GlfGLContext::GetCurrentGLContext();
if (!TF_VERIFY(context)) {
TF_RUNTIME_ERROR("Invalid GL context");
return false;
}
if (!_drawTarget) {
// Initialize the shared draw target late to ensure there is a valid GL
// context, which may not be the case at constructon time.
_Init(GfVec2i(128,128));
}
GfVec2i size(_drawTarget->GetSize());
GfVec4i viewport(0, 0, size[0], size[1]);
if (!TF_VERIFY(_renderPass)) {
return false;
}
_renderPass->SetRprimCollection(col);
// Setup state based on incoming params.
_renderPassState->SetAlphaThreshold(params.alphaThreshold);
_renderPassState->SetClipPlanes(params.clipPlanes);
_renderPassState->SetCullStyle(params.cullStyle);
_renderPassState->SetCamera(params.viewMatrix, params.projectionMatrix, viewport);
_renderPassState->SetLightingEnabled(false);
// Use a separate drawTarget (framebuffer object) for each GL context
// that uses this renderer, but the drawTargets share attachments/textures.
GlfDrawTargetRefPtr drawTarget = GlfDrawTarget::New(size);
// Clone attachments into this context. Note that this will do a
// light-weight copy of the textures, it does not produce a full copy of the
// underlying images.
drawTarget->Bind();
drawTarget->CloneAttachments(_drawTarget);
//
// Setup GL raster state
//
GLenum drawBuffers[3] = { GL_COLOR_ATTACHMENT0,
GL_COLOR_ATTACHMENT1,
GL_COLOR_ATTACHMENT2 };
glDrawBuffers(3, drawBuffers);
glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE);
glDisable(GL_BLEND);
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
glDepthFunc(GL_LEQUAL);
glClearColor(0,0,0,0);
glClearStencil(0);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT);
glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
GLF_POST_PENDING_GL_ERRORS();
//
// Execute the picking pass
//
{
GLuint vao;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
// Setup stencil state and prevent writes to color buffer.
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glEnable(GL_STENCIL_TEST);
glStencilFunc(GL_ALWAYS, 1, 1);
glStencilOp(GL_KEEP, // stencil failed
GL_KEEP, // stencil passed, depth failed
GL_REPLACE); // stencil passed, depth passed
//
// Condition the stencil buffer.
//
params.depthMaskCallback();
// we expect any GL state changes are restored.
// Disable stencil updates and setup the stencil test.
glStencilFunc(GL_LESS, 0, 1);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
// Clear depth incase the depthMaskCallback pollutes the depth buffer.
glClear(GL_DEPTH_BUFFER_BIT);
// Restore color outputs & setup state for rendering
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glDisable(GL_CULL_FACE);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glFrontFace(GL_CCW);
//
// Enable conservative rasterization, if available.
//
// XXX: This wont work until it's in the Glew build.
bool convRstr = glewIsSupported("GL_NV_conservative_raster");
if (convRstr) {
// XXX: this should come from Glew
#define GL_CONSERVATIVE_RASTERIZATION_NV 0x9346
glEnable(GL_CONSERVATIVE_RASTERIZATION_NV);
}
//
// Execute
//
// XXX: make intersector a Task
HdTaskSharedPtrVector tasks;
tasks.push_back(boost::make_shared<HdxIntersector_DrawTask>(_renderPass,
_renderPassState,
params.renderTags));
engine->Execute(*_index, tasks);
glDisable(GL_STENCIL_TEST);
if (convRstr) {
// XXX: this should come from Glew
#define GL_CONSERVATIVE_RASTERIZATION_NV 0x9346
glDisable(GL_CONSERVATIVE_RASTERIZATION_NV);
}
// Restore
glBindVertexArray(0);
glDeleteVertexArrays(1, &vao);
}
GLF_POST_PENDING_GL_ERRORS();
//
// Capture the result buffers to be resolved later.
//
size_t len = size[0] * size[1];
std::unique_ptr<unsigned char[]> primId(new unsigned char[len*4]);
std::unique_ptr<unsigned char[]> instanceId(new unsigned char[len*4]);
std::unique_ptr<unsigned char[]> elementId(new unsigned char[len*4]);
std::unique_ptr<float[]> depths(new float[len]);
glBindTexture(GL_TEXTURE_2D,
drawTarget->GetAttachments().at("primId")->GetGlTextureName());
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, &primId[0]);
glBindTexture(GL_TEXTURE_2D,
drawTarget->GetAttachments().at("instanceId")->GetGlTextureName());
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, &instanceId[0]);
glBindTexture(GL_TEXTURE_2D,
drawTarget->GetAttachments().at("elementId")->GetGlTextureName());
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, &elementId[0]);
glBindTexture(GL_TEXTURE_2D,
drawTarget->GetAttachments().at("depth")->GetGlTextureName());
glGetTexImage(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, GL_FLOAT,
&depths[0]);
glBindTexture(GL_TEXTURE_2D, 0);
GLF_POST_PENDING_GL_ERRORS();
if (result) {
*result = HdxIntersector::Result(
std::move(primId), std::move(instanceId), std::move(elementId),
std::move(depths), _index, params, viewport);
}
drawTarget->Unbind();
GLF_POST_PENDING_GL_ERRORS();
return true;
}
void
UsdMayaGLBatchRenderer::_RenderBatches(
const MHWRender::MDrawContext* vp2Context,
const MMatrix& viewMat,
const MMatrix& projectionMat,
const GfVec4d& viewport )
{
if( _renderQueue.empty() )
return;
if( !_populateQueue.empty() )
{
TF_DEBUG(PXRUSDMAYAGL_QUEUE_INFO).Msg(
"____________ POPULATE STAGE START ______________ (%zu)\n",_populateQueue.size());
std::vector<UsdImagingDelegate*> delegates;
UsdPrimVector rootPrims;
std::vector<SdfPathVector> excludedPrimPaths;
std::vector<SdfPathVector> invisedPrimPaths;
for( ShapeRenderer *shapeRenderer : _populateQueue )
{
delegates.push_back(shapeRenderer->_delegate.get());
rootPrims.push_back(shapeRenderer->_rootPrim);
excludedPrimPaths.push_back(shapeRenderer->_excludedPaths);
invisedPrimPaths.push_back(SdfPathVector());
shapeRenderer->_isPopulated = true;
}
UsdImagingDelegate::Populate( delegates,
rootPrims,
excludedPrimPaths,
invisedPrimPaths );
_populateQueue.clear();
TF_DEBUG(PXRUSDMAYAGL_QUEUE_INFO).Msg(
"^^^^^^^^^^^^ POPULATE STAGE FINISH ^^^^^^^^^^^^^ (%zu)\n",_populateQueue.size());
}
TF_DEBUG(PXRUSDMAYAGL_QUEUE_INFO).Msg(
"____________ RENDER STAGE START ______________ (%zu)\n",_renderQueue.size());
// A new display refresh signifies that the cached selection data is no
// longer valid.
_selectQueue.clear();
_selectResults.clear();
// We've already populated with all the selection info we need. We Reset
// and the first call to GetSoftSelectHelper in the next render pass will
// re-populate it.
_softSelectHelper.Reset();
GfMatrix4d modelViewMatrix(viewMat.matrix);
GfMatrix4d projectionMatrix(projectionMat.matrix);
_taskDelegate->SetCameraState(modelViewMatrix, projectionMatrix, viewport);
// save the current GL states which hydra may reset to default
glPushAttrib(GL_LIGHTING_BIT |
GL_ENABLE_BIT |
GL_POLYGON_BIT |
GL_DEPTH_BUFFER_BIT |
GL_VIEWPORT_BIT);
// hydra orients all geometry during topological processing so that
// front faces have ccw winding. We disable culling because culling
// is handled by fragment shader discard.
glFrontFace(GL_CCW); // < State is pushed via GL_POLYGON_BIT
glDisable(GL_CULL_FACE);
// note: to get benefit of alpha-to-coverage, the target framebuffer
// has to be a MSAA buffer.
glDisable(GL_BLEND);
glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE);
if (vp2Context) {
_taskDelegate->SetLightingStateFromMayaDrawContext(*vp2Context);
} else {
_taskDelegate->SetLightingStateFromVP1(viewMat);
}
// The legacy viewport does not support color management,
// so we roll our own gamma correction by GL means (only in
// non-highlight mode)
bool gammaCorrect = !vp2Context;
if( gammaCorrect )
glEnable(GL_FRAMEBUFFER_SRGB_EXT);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
// render task setup
HdTaskSharedPtrVector tasks = _taskDelegate->GetSetupTasks(); // lighting etc
for( const auto &renderSetIter : _renderQueue )
{
size_t hash = renderSetIter.first;
const RenderParams ¶ms = renderSetIter.second.first;
const _SdfPathSet &renderPaths = renderSetIter.second.second;
TF_DEBUG(PXRUSDMAYAGL_QUEUE_INFO).Msg(
"*** renderQueue, batch %zx, size %zu\n",
renderSetIter.first, renderPaths.size() );
SdfPathVector roots(renderPaths.begin(), renderPaths.end());
tasks.push_back(_taskDelegate->GetRenderTask(hash, params, roots));
}
_hdEngine.Execute(*_renderIndex, tasks);
if( gammaCorrect )
glDisable(GL_FRAMEBUFFER_SRGB_EXT);
glPopAttrib(); // GL_LIGHTING_BIT | GL_ENABLE_BIT | GL_POLYGON_BIT
// Selection is based on what we have last rendered to the display. The
// selection queue is cleared above, so this has the effect of resetting
// the render queue and prepping the selection queue without any
// significant memory hit.
_renderQueue.swap( _selectQueue );
TF_DEBUG(PXRUSDMAYAGL_QUEUE_INFO).Msg(
"^^^^^^^^^^^^ RENDER STAGE FINISH ^^^^^^^^^^^^^ (%zu)\n",_renderQueue.size());
}
