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6b423ece44
MozReview-Commit-ID: 1xrEX4Srij1
217 lines
5.5 KiB
C++
217 lines
5.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WebGLTransformFeedback.h"
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#include "GLContext.h"
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#include "mozilla/dom/WebGL2RenderingContextBinding.h"
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#include "WebGL2Context.h"
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namespace mozilla {
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WebGLTransformFeedback::WebGLTransformFeedback(WebGLContext* webgl, GLuint tf)
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: WebGLContextBoundObject(webgl)
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, mGLName(tf)
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, mIndexedBindings(webgl->mGLMaxTransformFeedbackSeparateAttribs)
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, mIsPaused(false)
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, mIsActive(false)
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{
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mContext->mTransformFeedbacks.insertBack(this);
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}
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WebGLTransformFeedback::~WebGLTransformFeedback()
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{
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DeleteOnce();
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}
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void
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WebGLTransformFeedback::Delete()
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{
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if (mGLName) {
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mContext->MakeContextCurrent();
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mContext->gl->fDeleteTransformFeedbacks(1, &mGLName);
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}
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removeFrom(mContext->mTransformFeedbacks);
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}
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////////////////////////////////////////
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void
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WebGLTransformFeedback::BeginTransformFeedback(GLenum primMode)
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{
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const char funcName[] = "beginTransformFeedback";
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if (mIsActive)
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return mContext->ErrorInvalidOperation("%s: Already active.", funcName);
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switch (primMode) {
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case LOCAL_GL_POINTS:
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case LOCAL_GL_LINES:
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case LOCAL_GL_TRIANGLES:
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break;
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default:
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mContext->ErrorInvalidEnum("%s: `primitiveMode` must be one of POINTS, LINES, or"
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" TRIANGLES.",
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funcName);
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return;
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}
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const auto& prog = mContext->mCurrentProgram;
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if (!prog ||
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!prog->IsLinked() ||
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!prog->LinkInfo()->componentsPerTFVert.size())
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{
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mContext->ErrorInvalidOperation("%s: Current program not valid for transform"
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" feedback.",
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funcName);
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return;
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}
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const auto& linkInfo = prog->LinkInfo();
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const auto& componentsPerTFVert = linkInfo->componentsPerTFVert;
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size_t minVertCapacity = SIZE_MAX;
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for (size_t i = 0; i < componentsPerTFVert.size(); i++) {
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const auto& indexedBinding = mIndexedBindings[i];
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const auto& componentsPerVert = componentsPerTFVert[i];
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const auto& buffer = indexedBinding.mBufferBinding;
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if (!buffer) {
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mContext->ErrorInvalidOperation("%s: No buffer attached to required transform"
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" feedback index %u.",
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funcName, (uint32_t)i);
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return;
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}
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const size_t vertCapacity = buffer->ByteLength() / 4 / componentsPerVert;
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minVertCapacity = std::min(minVertCapacity, vertCapacity);
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}
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////
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const auto& gl = mContext->gl;
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gl->MakeCurrent();
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gl->fBeginTransformFeedback(primMode);
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////
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mIsActive = true;
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MOZ_ASSERT(!mIsPaused);
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mActive_Program = prog;
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mActive_PrimMode = primMode;
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mActive_VertPosition = 0;
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mActive_VertCapacity = minVertCapacity;
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////
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for (const auto& cur : mIndexedBindings) {
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const auto& buffer = cur.mBufferBinding;
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if (buffer) {
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buffer->mNumActiveTFOs++;
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}
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}
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mActive_Program->mNumActiveTFOs++;
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}
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void
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WebGLTransformFeedback::EndTransformFeedback()
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{
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const char funcName[] = "endTransformFeedback";
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if (!mIsActive)
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return mContext->ErrorInvalidOperation("%s: Not active.", funcName);
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////
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const auto& gl = mContext->gl;
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gl->MakeCurrent();
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gl->fEndTransformFeedback();
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////
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mIsActive = false;
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mIsPaused = false;
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////
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for (const auto& cur : mIndexedBindings) {
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const auto& buffer = cur.mBufferBinding;
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if (buffer) {
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buffer->mNumActiveTFOs--;
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}
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}
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mActive_Program->mNumActiveTFOs--;
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}
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void
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WebGLTransformFeedback::PauseTransformFeedback()
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{
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const char funcName[] = "pauseTransformFeedback";
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if (!mIsActive ||
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mIsPaused)
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{
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mContext->ErrorInvalidOperation("%s: Not active or is paused.", funcName);
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return;
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}
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////
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const auto& gl = mContext->gl;
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gl->MakeCurrent();
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gl->fPauseTransformFeedback();
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////
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mIsPaused = true;
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}
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void
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WebGLTransformFeedback::ResumeTransformFeedback()
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{
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const char funcName[] = "resumeTransformFeedback";
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if (!mIsPaused)
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return mContext->ErrorInvalidOperation("%s: Not paused.", funcName);
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if (mContext->mCurrentProgram != mActive_Program) {
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mContext->ErrorInvalidOperation("%s: Active program differs from original.",
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funcName);
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return;
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}
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////
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const auto& gl = mContext->gl;
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gl->MakeCurrent();
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gl->fResumeTransformFeedback();
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////
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MOZ_ASSERT(mIsActive);
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mIsPaused = false;
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}
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////////////////////////////////////////
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JSObject*
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WebGLTransformFeedback::WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto)
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{
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return dom::WebGLTransformFeedbackBinding::Wrap(cx, this, givenProto);
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}
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(WebGLTransformFeedback, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(WebGLTransformFeedback, Release)
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(WebGLTransformFeedback,
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mGenericBufferBinding,
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mIndexedBindings,
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mActive_Program)
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} // namespace mozilla
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