dom/canvas/WebGL2ContextTransformFeedback.cpp
author Brian Hackett <bhackett1024@gmail.com>
Wed, 03 Oct 2018 15:03:02 -1000
changeset 495437 00c56e070d3835c77fd0138a5c641d04a72dcb89
parent 486013 b807f63147aeb40dc4139b258d630cc1739662e0
child 499278 4b5b1ff23dd7247ed098ac805c60292743f8eb20
permissions -rw-r--r--
Bug 1495272 Part 1 - Don't register deferred finalizer in BindingJSObjectCreator until initialization succeeds, r=bz.

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "WebGL2Context.h"
#include "WebGLActiveInfo.h"
#include "WebGLProgram.h"
#include "WebGLTransformFeedback.h"
#include "GLContext.h"

namespace mozilla {

// -------------------------------------------------------------------------
// Transform Feedback

already_AddRefed<WebGLTransformFeedback>
WebGL2Context::CreateTransformFeedback()
{
    const FuncScope funcScope(*this, "createTransformFeedback");
    if (IsContextLost())
        return nullptr;

    GLuint tf = 0;
    gl->fGenTransformFeedbacks(1, &tf);

    RefPtr<WebGLTransformFeedback> ret = new WebGLTransformFeedback(this, tf);
    return ret.forget();
}

void
WebGL2Context::DeleteTransformFeedback(WebGLTransformFeedback* tf)
{
    const FuncScope funcScope(*this, "deleteTransformFeedback");
    if (!ValidateDeleteObject(tf))
        return;

    if (tf->mIsActive) {
        ErrorInvalidOperation("Cannot delete active transform feedbacks.");
        return;
    }

    if (mBoundTransformFeedback == tf) {
        BindTransformFeedback(LOCAL_GL_TRANSFORM_FEEDBACK, nullptr);
    }

    tf->RequestDelete();
}

bool
WebGL2Context::IsTransformFeedback(const WebGLTransformFeedback* const obj)
{
    const FuncScope funcScope(*this, "isTransformFeedback");
    if (!ValidateIsObject(obj))
        return false;

    return gl->fIsTransformFeedback(obj->mGLName);
}

void
WebGL2Context::BindTransformFeedback(GLenum target, WebGLTransformFeedback* tf)
{
    const FuncScope funcScope(*this, "bindTransformFeedback");
    if (IsContextLost())
        return;

    if (target != LOCAL_GL_TRANSFORM_FEEDBACK)
        return ErrorInvalidEnum("`target` must be TRANSFORM_FEEDBACK.");

    if (tf && !ValidateObject("tf", *tf))
        return;

    if (mBoundTransformFeedback->mIsActive &&
        !mBoundTransformFeedback->mIsPaused)
    {
        ErrorInvalidOperation("Currently bound transform feedback is active and not"
                              " paused.");
        return;
    }

    ////

    if (mBoundTransformFeedback) {
        mBoundTransformFeedback->AddBufferBindCounts(-1);
    }

    mBoundTransformFeedback = (tf ? tf : mDefaultTransformFeedback);

    gl->fBindTransformFeedback(target, mBoundTransformFeedback->mGLName);

    if (mBoundTransformFeedback) {
        mBoundTransformFeedback->AddBufferBindCounts(+1);
    }
}

void
WebGL2Context::BeginTransformFeedback(GLenum primMode)
{
    const FuncScope funcScope(*this, "beginTransformFeedback");
    if (IsContextLost())
        return;

    mBoundTransformFeedback->BeginTransformFeedback(primMode);
}

void
WebGL2Context::EndTransformFeedback()
{
    const FuncScope funcScope(*this, "endTransformFeedback");
    if (IsContextLost())
        return;

    mBoundTransformFeedback->EndTransformFeedback();
}

void
WebGL2Context::PauseTransformFeedback()
{
    const FuncScope funcScope(*this, "pauseTransformFeedback");
    if (IsContextLost())
        return;

    mBoundTransformFeedback->PauseTransformFeedback();
}

void
WebGL2Context::ResumeTransformFeedback()
{
    const FuncScope funcScope(*this, "resumeTransformFeedback");
    if (IsContextLost())
        return;

    mBoundTransformFeedback->ResumeTransformFeedback();
}

void
WebGL2Context::TransformFeedbackVaryings(WebGLProgram& program,
                                         const dom::Sequence<nsString>& varyings,
                                         GLenum bufferMode)
{
    const FuncScope funcScope(*this, "transformFeedbackVaryings");
    if (IsContextLost())
        return;

    if (!ValidateObject("program", program))
        return;

    program.TransformFeedbackVaryings(varyings, bufferMode);
}

already_AddRefed<WebGLActiveInfo>
WebGL2Context::GetTransformFeedbackVarying(const WebGLProgram& program, GLuint index)
{
    const FuncScope funcScope(*this, "getTransformFeedbackVarying");
    if (IsContextLost())
        return nullptr;

    if (!ValidateObject("program", program))
        return nullptr;

    return program.GetTransformFeedbackVarying(index);
}

} // namespace mozilla