tst_glshadermanager.cpp

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// Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#include <QtTest/QTest>

#include <glresourcemanagers_p.h>

#include <Qt3DCore/qnodeid.h>

#include "qbackendnodetester.h"

#include "testrenderer.h"

class tst_GLShaderManager : public Qt3DCore::QBackendNodeTester

    Q_OBJECT

private Q_SLOTS:

    void adopt();

    void lookupResource();

    void abandon();

    void insertAfterRemoval();

};

void tst_GLShaderManager::adopt()

    // GIVEN

    Qt3DRender::Render::OpenGL::GLShaderManager cache;

    Qt3DRender::QShaderProgram frontendShader1;

    Qt3DRender::QShaderProgram frontendShader2;

    TestRenderer renderer;

    Qt3DRender::Render::Shader backendShaderNode1;

    Qt3DRender::Render::Shader backendShaderNode2;

    backendShaderNode1.setRenderer(&renderer);

    backendShaderNode2.setRenderer(&renderer);

    simulateInitializationSync(&frontendShader1, &backendShaderNode1);

    simulateInitializationSync(&frontendShader2, &backendShaderNode2);

    // THEN

    QVERIFY(cache.lookupResource(backendShaderNode1.peerId()) == nullptr);

    QVERIFY(cache.lookupResource(backendShaderNode2.peerId()) == nullptr);

    QVERIFY(backendShaderNode1.peerId() != backendShaderNode2.peerId());

    // WHEN

    Qt3DRender::Render::OpenGL::GLShader *glShader1 = cache.createOrAdoptExisting(&backendShaderNode1);

    // THEN

    QVERIFY(glShader1 != nullptr);

    std::vector<Qt3DCore::QNodeId> shaderNodeIds = cache.shaderIdsForProgram(glShader1);

    QCOMPARE(shaderNodeIds.size(), 1U);

    QCOMPARE(shaderNodeIds.front(), backendShaderNode1.peerId());

    // WHEN

    Qt3DRender::Render::OpenGL::GLShader *glShader2 = cache.createOrAdoptExisting(&backendShaderNode2);

    // THEN

    QCOMPARE(glShader1, glShader2);

    shaderNodeIds = cache.shaderIdsForProgram(glShader2);

    QCOMPARE(shaderNodeIds.size(), 2U);

    QCOMPARE(shaderNodeIds.front(), backendShaderNode1.peerId());

    QCOMPARE(shaderNodeIds.back(), backendShaderNode2.peerId());

void tst_GLShaderManager::lookupResource()

    // GIVEN

    Qt3DRender::Render::OpenGL::GLShaderManager cache;

    Qt3DRender::QShaderProgram frontendShader1;

    Qt3DRender::QShaderProgram frontendShader2;

    TestRenderer renderer;

    Qt3DRender::Render::Shader backendShaderNode1;

    Qt3DRender::Render::Shader backendShaderNode2;

    backendShaderNode1.setRenderer(&renderer);

    backendShaderNode2.setRenderer(&renderer);

    simulateInitializationSync(&frontendShader1, &backendShaderNode1);

    simulateInitializationSync(&frontendShader2, &backendShaderNode2);

    // WHEN

    cache.createOrAdoptExisting(&backendShaderNode1);

    cache.createOrAdoptExisting(&backendShaderNode2);

    // THEN

    Qt3DRender::Render::OpenGL::GLShader *glShader1 = cache.lookupResource(backendShaderNode1.peerId());

    Qt3DRender::Render::OpenGL::GLShader *glShader2 = cache.lookupResource(backendShaderNode2.peerId());

    QVERIFY(glShader1 != nullptr);

    QCOMPARE(glShader1, glShader2);

    const std::vector<Qt3DCore::QNodeId> shaderNodeIds = cache.shaderIdsForProgram(glShader1);

    QCOMPARE(shaderNodeIds.size(), 2U);

    QVERIFY(std::find(shaderNodeIds.begin(),

                      shaderNodeIds.end(),

                      frontendShader1.id()) != shaderNodeIds.end());

    QVERIFY(std::find(shaderNodeIds.begin(),

                      shaderNodeIds.end(),

                      frontendShader2.id()) != shaderNodeIds.end());

void tst_GLShaderManager::abandon()

    // GIVEN

    Qt3DRender::Render::OpenGL::GLShaderManager cache;

    Qt3DRender::QShaderProgram frontendShader1;

    Qt3DRender::QShaderProgram frontendShader2;

    TestRenderer renderer;

    Qt3DRender::Render::Shader backendShaderNode1;

    Qt3DRender::Render::Shader backendShaderNode2;

    backendShaderNode1.setRenderer(&renderer);

    backendShaderNode2.setRenderer(&renderer);

    simulateInitializationSync(&frontendShader1, &backendShaderNode1);

    simulateInitializationSync(&frontendShader2, &backendShaderNode2);

    cache.createOrAdoptExisting(&backendShaderNode1);

    cache.createOrAdoptExisting(&backendShaderNode2);

    // WHEN

    Qt3DRender::Render::OpenGL::GLShader *glShader = cache.lookupResource(backendShaderNode1.peerId());

    cache.abandon(glShader, &backendShaderNode1);

    // THEN

    std::vector<Qt3DCore::QNodeId> shaderNodeIds = cache.shaderIdsForProgram(glShader);

    QVERIFY(cache.takeAbandonned().empty());

    QCOMPARE(shaderNodeIds.size(), 1U);

    QCOMPARE(shaderNodeIds.front(), backendShaderNode2.peerId());

    // WHEN

    cache.abandon(glShader, &backendShaderNode2);

    // THEN

    shaderNodeIds = cache.shaderIdsForProgram(glShader);

    QCOMPARE(shaderNodeIds.size(), 0U);

    const std::vector<Qt3DRender::Render::OpenGL::GLShader *> releasedShaders = cache.takeAbandonned();

    QCOMPARE(releasedShaders.size(), 1U);

    QCOMPARE(releasedShaders.front(), glShader);

void tst_GLShaderManager::insertAfterRemoval()

    // GIVEN

    Qt3DRender::Render::OpenGL::GLShaderManager cache;

    Qt3DRender::QShaderProgram frontendShader;

    TestRenderer renderer;

    Qt3DRender::Render::Shader backendShaderNode;

    backendShaderNode.setRenderer(&renderer);

    simulateInitializationSync(&frontendShader, &backendShaderNode);

    // WHEN

    Qt3DRender::Render::OpenGL::GLShader *apiShader1 = cache.createOrAdoptExisting(&backendShaderNode);

    const Qt3DRender::Render::OpenGL::GLShader *originalApiShader = apiShader1;

    // THEN

    auto apiShader2 = cache.lookupResource(frontendShader.id());

    QVERIFY(apiShader1 != nullptr);

    QVERIFY(apiShader2 != nullptr);

    QVERIFY(apiShader1 == originalApiShader);

    QVERIFY(apiShader1 == apiShader2);

    // WHEN

    cache.abandon(apiShader1, &backendShaderNode);

    // THEN

    Qt3DRender::Render::OpenGL::GLShader *apiShaderEmpty = cache.lookupResource(frontendShader.id());

    QVERIFY(apiShaderEmpty == nullptr);

    // WHEN

    apiShader1 = cache.createOrAdoptExisting(&backendShaderNode);

    cache.purge();

    apiShader2 = cache.lookupResource(frontendShader.id());

    // THEN

    QVERIFY(apiShader1 != nullptr);

    QVERIFY(apiShader2 != nullptr);

    QVERIFY(apiShader1 == apiShader2);

    QVERIFY(apiShader2 == originalApiShader);

QTEST_APPLESS_MAIN(tst_GLShaderManager)

#include "tst_glshadermanager.moc"