SampleApplication.cpp

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Author : Jamie Madill
Date : 2019-05-01 15:11:46
Hash : 3089f92e
Message : Move EGL Display config into EGLPlatformParameters. This CL moves all of the EGLDisplay configuration into an EGL platform struct. Consolidating display configuration in the struct allows us to move configuration out of the test constructor. Then when we filter test configs we don't need to wait for the individual test setup. Bug: angleproject:3393 Change-Id: I5bd06dcdc9f2867ebc43c1d4984077ada35cafc8 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1574674 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

samples/sample_util/SampleApplication.cpp

//
// Copyright (c) 2013 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

#include "SampleApplication.h"

#include "util/EGLWindow.h"
#include "util/gles_loader_autogen.h"
#include "util/random_utils.h"
#include "util/system_utils.h"

#include <string.h>
#include <iostream>
#include <utility>

namespace
{
const char *kUseAngleArg = "--use-angle=";

using DisplayTypeInfo = std::pair<const char *, EGLint>;

const DisplayTypeInfo kDisplayTypes[] = {
    {"d3d9", EGL_PLATFORM_ANGLE_TYPE_D3D9_ANGLE}, {"d3d11", EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE},
    {"gl", EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE}, {"gles", EGL_PLATFORM_ANGLE_TYPE_OPENGLES_ANGLE},
    {"null", EGL_PLATFORM_ANGLE_TYPE_NULL_ANGLE}, {"vulkan", EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE}};

EGLint GetDisplayTypeFromArg(const char *displayTypeArg)
{
    for (const auto &displayTypeInfo : kDisplayTypes)
    {
        if (strcmp(displayTypeInfo.first, displayTypeArg) == 0)
        {
            std::cout << "Using ANGLE back-end API: " << displayTypeInfo.first << std::endl;
            return displayTypeInfo.second;
        }
    }

    std::cout << "Unknown ANGLE back-end API: " << displayTypeArg << std::endl;
    return EGL_PLATFORM_ANGLE_TYPE_DEFAULT_ANGLE;
}
}  // anonymous namespace

SampleApplication::SampleApplication(std::string name,
                                     int argc,
                                     char **argv,
                                     EGLint glesMajorVersion,
                                     EGLint glesMinorVersion,
                                     size_t width,
                                     size_t height)
    : mName(std::move(name)),
      mWidth(width),
      mHeight(height),
      mRunning(false),
      mEGLWindow(nullptr),
      mOSWindow(nullptr)
{
    mPlatformParams.majorVersion = glesMajorVersion;
    mPlatformParams.minorVersion = glesMinorVersion;
    mPlatformParams.renderer     = EGL_PLATFORM_ANGLE_TYPE_DEFAULT_ANGLE;

    if (argc > 1 && strncmp(argv[1], kUseAngleArg, strlen(kUseAngleArg)) == 0)
    {
        mPlatformParams.renderer = GetDisplayTypeFromArg(argv[1] + strlen(kUseAngleArg));
    }

    // Load EGL library so we can initialize the display.
    mEntryPointsLib.reset(angle::OpenSharedLibrary(ANGLE_EGL_LIBRARY_NAME));

    mEGLWindow = EGLWindow::New(glesMajorVersion, glesMinorVersion);
    mTimer.reset(CreateTimer());
    mOSWindow = OSWindow::New();
}

SampleApplication::~SampleApplication()
{
    EGLWindow::Delete(&mEGLWindow);
    OSWindow::Delete(&mOSWindow);
}

bool SampleApplication::initialize()
{
    return true;
}

void SampleApplication::destroy() {}

void SampleApplication::step(float dt, double totalTime) {}

void SampleApplication::draw() {}

void SampleApplication::swap()
{
    mEGLWindow->swap();
}

OSWindow *SampleApplication::getWindow() const
{
    return mOSWindow;
}

EGLConfig SampleApplication::getConfig() const
{
    return mEGLWindow->getConfig();
}

EGLDisplay SampleApplication::getDisplay() const
{
    return mEGLWindow->getDisplay();
}

EGLSurface SampleApplication::getSurface() const
{
    return mEGLWindow->getSurface();
}

EGLContext SampleApplication::getContext() const
{
    return mEGLWindow->getContext();
}

int SampleApplication::run()
{
    if (!mOSWindow->initialize(mName, mWidth, mHeight))
    {
        return -1;
    }

    mOSWindow->setVisible(true);

    ConfigParameters configParams;
    configParams.redBits     = 8;
    configParams.greenBits   = 8;
    configParams.blueBits    = 8;
    configParams.alphaBits   = 8;
    configParams.depthBits   = 24;
    configParams.stencilBits = 8;

    if (!mEGLWindow->initializeGL(mOSWindow, mEntryPointsLib.get(), mPlatformParams, configParams))
    {
        return -1;
    }

    // Disable vsync
    if (!mEGLWindow->setSwapInterval(0))
    {
        return -1;
    }

    angle::LoadGLES(eglGetProcAddress);

    mRunning   = true;
    int result = 0;

    if (!initialize())
    {
        mRunning = false;
        result   = -1;
    }

    mTimer->start();
    double prevTime = 0.0;

    while (mRunning)
    {
        double elapsedTime = mTimer->getElapsedTime();
        double deltaTime   = elapsedTime - prevTime;

        step(static_cast<float>(deltaTime), elapsedTime);

        // Clear events that the application did not process from this frame
        Event event;
        while (popEvent(&event))
        {
            // If the application did not catch a close event, close now
            if (event.Type == Event::EVENT_CLOSED)
            {
                exit();
            }
        }

        if (!mRunning)
        {
            break;
        }

        draw();
        swap();

        mOSWindow->messageLoop();

        prevTime = elapsedTime;
    }

    destroy();
    mEGLWindow->destroyGL();
    mOSWindow->destroy();

    return result;
}

void SampleApplication::exit()
{
    mRunning = false;
}

bool SampleApplication::popEvent(Event *event)
{
    return mOSWindow->popEvent(event);
}

kc3-lang/angle/samples/sample_util/SampleApplication.cpp

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kc3-lang/angle /samples/sample_util/SampleApplication.cpp