DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (d38398e5144e)

VCS Links

AvailableRunnable

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270
/* -*- Mode: C++; tab-width: 20; 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 "WebGLQuery.h"

#include "gfxPrefs.h"
#include "GLContext.h"
#include "mozilla/dom/WebGL2RenderingContextBinding.h"
#include "nsContentUtils.h"
#include "WebGLContext.h"

namespace mozilla {

class AvailableRunnable final : public Runnable
{
    const RefPtr<WebGLQuery> mQuery;

public:
    explicit AvailableRunnable(WebGLQuery* query)
        : mQuery(query)
    { }

    NS_IMETHOD Run() override {
        mQuery->mCanBeAvailable = true;
        return NS_OK;
    }
};

////

static GLuint
GenQuery(gl::GLContext* gl)
{
    gl->MakeCurrent();

    GLuint ret = 0;
    gl->fGenQueries(1, &ret);
    return ret;
}

WebGLQuery::WebGLQuery(WebGLContext* webgl)
    : WebGLRefCountedObject(webgl)
    , mGLName(GenQuery(mContext->gl))
    , mTarget(0)
    , mActiveSlot(nullptr)
    , mCanBeAvailable(false)
{
    mContext->mQueries.insertBack(this);
}

void
WebGLQuery::Delete()
{
    mContext->MakeContextCurrent();
    mContext->gl->fDeleteQueries(1, &mGLName);
    LinkedListElement<WebGLQuery>::removeFrom(mContext->mQueries);
}

////

static GLenum
TargetForDriver(const gl::GLContext* gl, GLenum target)
{
    switch (target) {
    case LOCAL_GL_ANY_SAMPLES_PASSED:
    case LOCAL_GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
        break;

    default:
        return target;
    }

    if (gl->IsSupported(gl::GLFeature::occlusion_query_boolean))
        return target;

    if (gl->IsSupported(gl::GLFeature::occlusion_query2))
        return LOCAL_GL_ANY_SAMPLES_PASSED;

    return LOCAL_GL_SAMPLES_PASSED;
}

void
WebGLQuery::BeginQuery(GLenum target, WebGLRefPtr<WebGLQuery>& slot)
{
    const char funcName[] = "beginQuery";

    if (mTarget && target != mTarget) {
        mContext->ErrorInvalidOperation("%s: Queries cannot change targets.", funcName);
        return;
    }

    ////

    mTarget = target;
    mActiveSlot = &slot;
    *mActiveSlot = this;

    ////

    const auto& gl = mContext->gl;
    gl->MakeCurrent();

    const auto driverTarget = TargetForDriver(gl, mTarget);
    gl->fBeginQuery(driverTarget, mGLName);
}

void
WebGLQuery::EndQuery()
{
    *mActiveSlot = nullptr;
    mActiveSlot = nullptr;
    mCanBeAvailable = false;

    ////

    const auto& gl = mContext->gl;
    gl->MakeCurrent();

    const auto driverTarget = TargetForDriver(gl, mTarget);
    gl->fEndQuery(driverTarget);

    ////

    NS_DispatchToCurrentThread(new AvailableRunnable(this));
}

void
WebGLQuery::GetQueryParameter(GLenum pname, JS::MutableHandleValue retval) const
{
    const char funcName[] = "getQueryParameter";

    switch (pname) {
    case LOCAL_GL_QUERY_RESULT_AVAILABLE:
    case LOCAL_GL_QUERY_RESULT:
        break;

    default:
        mContext->ErrorInvalidEnumArg(funcName, "pname", pname);
        return;
    }

    if (!mTarget) {
        mContext->ErrorInvalidOperation("%s: Query has never been active.", funcName);
        return;
    }

    if (mActiveSlot)
        return mContext->ErrorInvalidOperation("%s: Query is still active.", funcName);

    // End of validation
    ////

    // We must usually wait for an event loop before the query can be available.
    const bool canBeAvailable = (mCanBeAvailable || gfxPrefs::WebGLImmediateQueries());
    if (!canBeAvailable) {
        if (pname == LOCAL_GL_QUERY_RESULT_AVAILABLE) {
            retval.set(JS::BooleanValue(false));
        }
        return;
    }

    const auto& gl = mContext->gl;
    gl->MakeCurrent();

    uint64_t val = 0;
    switch (pname) {
    case LOCAL_GL_QUERY_RESULT_AVAILABLE:
        gl->fGetQueryObjectuiv(mGLName, pname, (GLuint*)&val);
        retval.set(JS::BooleanValue(bool(val)));
        return;

    case LOCAL_GL_QUERY_RESULT:
        switch (mTarget) {
        case LOCAL_GL_TIME_ELAPSED_EXT:
        case LOCAL_GL_TIMESTAMP_EXT:
            if (mContext->Has64BitTimestamps()) {
                gl->fGetQueryObjectui64v(mGLName, pname, &val);
                break;
            }
            MOZ_FALLTHROUGH;

        default:
            gl->fGetQueryObjectuiv(mGLName, LOCAL_GL_QUERY_RESULT, (GLuint*)&val);
            break;
        }

        switch (mTarget) {
        case LOCAL_GL_ANY_SAMPLES_PASSED:
        case LOCAL_GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
            retval.set(JS::BooleanValue(bool(val)));
            break;

        case LOCAL_GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
        case LOCAL_GL_TIME_ELAPSED_EXT:
        case LOCAL_GL_TIMESTAMP_EXT:
            retval.set(JS::NumberValue(val));
            break;

        default:
            MOZ_CRASH("Bad `mTarget`.");
        }
        return;

    default:
        MOZ_CRASH("Bad `pname`.");
    }
}

bool
WebGLQuery::IsQuery() const
{
    MOZ_ASSERT(!IsDeleted());

    if (!mTarget)
        return false;

    return true;
}

void
WebGLQuery::DeleteQuery()
{
    MOZ_ASSERT(!IsDeleteRequested());

    if (mActiveSlot) {
        EndQuery();
    }

    RequestDelete();
}

void
WebGLQuery::QueryCounter(const char* funcName, GLenum target)
{
    if (target != LOCAL_GL_TIMESTAMP_EXT) {
        mContext->ErrorInvalidEnum("%s: `target` must be TIMESTAMP_EXT.", funcName);
        return;
    }

    if (mTarget && target != mTarget) {
        mContext->ErrorInvalidOperation("%s: Queries cannot change targets.", funcName);
        return;
    }

    mTarget = target;
    mCanBeAvailable = false;

    const auto& gl = mContext->gl;
    gl->MakeCurrent();
    gl->fQueryCounter(mGLName, mTarget);

    NS_DispatchToCurrentThread(new AvailableRunnable(this));
}

////

JSObject*
WebGLQuery::WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto)
{
    return dom::WebGLQueryBinding::Wrap(cx, this, givenProto);
}

NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLQuery)

NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(WebGLQuery, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(WebGLQuery, Release)

} // namespace mozilla