Widgets flashes purple while fasting changing icon or pixmap

[Dreikblack]

#include "UltraEngine.h"

using namespace UltraEngine;

shared_ptr<Window> window;
shared_ptr<Framebuffer> framebuffer;
shared_ptr<World> menuWold;
shared_ptr<Interface> ui;
shared_ptr<Camera> uiCamera;

shared_ptr<Widget> panel;
shared_ptr<Icon> icon1;
shared_ptr<Icon> icon2;

bool isFirst = true;

void initGui()
{
    auto default_font = LoadFont("Fonts\\arial.ttf");
    ui = CreateInterface(menuWold, default_font, framebuffer->GetSize());
    ui->SetRenderLayers(2);
    ui->root->SetColor(0.0f, 0.0f, 0.0f, 0.0f);
    uiCamera = CreateCamera(menuWold, PROJECTION_ORTHOGRAPHIC);
    uiCamera->SetPosition((float)framebuffer->GetSize().x * 0.5f, (float)framebuffer->GetSize().y * 0.5f, 0);
    uiCamera->SetRenderLayers(2);
    uiCamera->SetClearMode(CLEAR_DEPTH);

    panel = CreatePanel(10, 50, 64, 64, ui->root, PANEL_DEFAULT);
    icon1 = LoadIcon("https://raw.githubusercontent.com/UltraEngine/Documentation/master/Assets/Icons/help.svg");
    icon2 = LoadIcon("https://raw.githubusercontent.com/UltraEngine/Documentation/master/Assets/Icons/new.svg");
    panel->SetIcon(icon1);
}


int main(int argc, const char* argv[])
{
    //Get the displays
    auto displays = GetDisplays();

    //Create a window
    window = CreateWindow("Ultra Engine", 0, 0, 200, 200, displays[0], WINDOW_DEFAULT);

    //Create a world
    menuWold = CreateWorld();

    //Create a framebuffer
    framebuffer = CreateFramebuffer(window);

    //Create light
    auto light = CreateBoxLight(menuWold);
    light->SetRange(-10, 10);
    light->SetRotation(15, 15, 0);
    light->SetColor(2);

    //Create camera
    auto camera = CreateCamera(menuWold);
    camera->SetClearColor(0.125);
    camera->SetPosition(0, 0, -3);
    camera->SetFov(70);

    initGui();

    //Main loop
    while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false)
    {
        isFirst = !isFirst;
        if (isFirst)
        {
            panel->SetIcon(icon1);
        }
        else
        {
            panel->SetIcon(icon2);
        }
        menuWold->Update();
        menuWold->Render(framebuffer);
    }
    return 0;
}

 

[Josh]

Whoa, that's a trippy example! 

[Josh]

What I can tell so far is that the icon is continuously being rasterized to generate new pixmaps, because the old pixmap is getting dumped from memory...

[Josh]

Problem goes away if I disable multithreading. Press space to switch the icon:

#include "UltraEngine.h"

using namespace UltraEngine;

shared_ptr<Window> window;
shared_ptr<Framebuffer> framebuffer;
shared_ptr<World> menuWold;
shared_ptr<Interface> ui;
shared_ptr<Camera> uiCamera;

shared_ptr<Widget> panel;
shared_ptr<Icon> icon1;
shared_ptr<Icon> icon2;

bool isFirst = true;

void initGui()
{
    auto default_font = LoadFont("Fonts\\arial.ttf");
    ui = CreateInterface(menuWold, default_font, framebuffer->GetSize());
    ui->SetRenderLayers(2);
    ui->root->SetColor(0.0f, 0.0f, 0.0f, 0.0f);
    uiCamera = CreateCamera(menuWold, PROJECTION_ORTHOGRAPHIC);
    uiCamera->SetPosition((float)framebuffer->GetSize().x * 0.5f, (float)framebuffer->GetSize().y * 0.5f, 0);
    uiCamera->SetRenderLayers(2);
    uiCamera->SetClearMode(CLEAR_DEPTH);

    panel = CreatePanel(10, 50, 64, 64, ui->root, PANEL_DEFAULT);
    icon1 = LoadIcon("https://raw.githubusercontent.com/UltraEngine/Documentation/master/Assets/Icons/help.svg");
    icon2 = LoadIcon("https://raw.githubusercontent.com/UltraEngine/Documentation/master/Assets/Icons/new.svg");
    panel->SetIcon(icon1);
}


int main(int argc, const char* argv[])
{
    EngineSettings settings;
    settings.asyncrender = false;
    Initialize(settings);

    //Get the displays
    auto displays = GetDisplays();

    //Create a window
    window = CreateWindow("Ultra Engine", 0, 0, 200, 200, displays[0], WINDOW_DEFAULT);

    //Create a world
    menuWold = CreateWorld();

    //Create a framebuffer
    framebuffer = CreateFramebuffer(window);

    //Create light
    auto light = CreateBoxLight(menuWold);
    light->SetRange(-10, 10);
    light->SetRotation(15, 15, 0);
    light->SetColor(2);

    //Create camera
    auto camera = CreateCamera(menuWold);
    camera->SetClearColor(0.125);
    camera->SetPosition(0, 0, -3);
    camera->SetFov(70);

    initGui();

    //Main loop
    while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false)
    {
        if (window->KeyHit(KEY_SPACE))
        {
            isFirst = !isFirst;
        }
        if (isFirst)
        {
            panel->SetIcon(icon1);
        }
        else
        {
            panel->SetIcon(icon2);
        }
        menuWold->Update();
        menuWold->Render(framebuffer);
    }
    return 0;
}

 

[Josh]

It seems to not occur the first time the icon is set. I suspect this has to do with a texture handle being reset while the old visibility set is still referencing it, resulting in the display of the default pink texture:

#include "UltraEngine.h"

using namespace UltraEngine;

shared_ptr<Window> window;
shared_ptr<Framebuffer> framebuffer;
shared_ptr<World> menuWold;
shared_ptr<Interface> ui;
shared_ptr<Camera> uiCamera;

shared_ptr<Widget> panel;
shared_ptr<Icon> icon1;
shared_ptr<Icon> icon2;

bool isFirst = true;

void initGui()
{
    auto default_font = LoadFont("Fonts\\arial.ttf");
    ui = CreateInterface(menuWold, default_font, framebuffer->GetSize());
    ui->SetRenderLayers(2);
    ui->root->SetColor(0.0f, 0.0f, 0.0f, 0.0f);
    uiCamera = CreateCamera(menuWold, PROJECTION_ORTHOGRAPHIC);
    uiCamera->SetPosition((float)framebuffer->GetSize().x * 0.5f, (float)framebuffer->GetSize().y * 0.5f, 0);
    uiCamera->SetRenderLayers(2);
    uiCamera->SetClearMode(CLEAR_DEPTH);

    panel = CreatePanel(10, 50, 64, 64, ui->root, PANEL_DEFAULT);
    icon1 = LoadIcon("https://raw.githubusercontent.com/UltraEngine/Documentation/master/Assets/Icons/help.svg");
    icon2 = LoadIcon("https://raw.githubusercontent.com/UltraEngine/Documentation/master/Assets/Icons/new.svg");
    //panel->SetIcon(icon1);
}


int main(int argc, const char* argv[])
{
    //Get the displays
    auto displays = GetDisplays();

    //Create a window
    window = CreateWindow("Ultra Engine", 0, 0, 200, 200, displays[0], WINDOW_DEFAULT);

    //Create a world
    menuWold = CreateWorld();

    //Create a framebuffer
    framebuffer = CreateFramebuffer(window);

    //Create light
    auto light = CreateBoxLight(menuWold);
    light->SetRange(-10, 10);
    light->SetRotation(15, 15, 0);
    light->SetColor(2);

    //Create camera
    auto camera = CreateCamera(menuWold);
    camera->SetClearColor(0.125);
    camera->SetPosition(0, 0, -3);
    camera->SetFov(70);

    initGui();

    //Main loop
    while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false)
    {
        if (window->KeyHit(KEY_SPACE))
        {
            isFirst = !isFirst;
            if (isFirst)
            {
                panel->SetIcon(icon1);
            }
            else
            {
                panel->SetIcon(icon2);
            }
        }
        menuWold->Update();
        menuWold->Render(framebuffer);
    }
    return 0;
}

 

[Josh]

I know it is caused by a texture being prematurely released, but I don't see how it is happening...

[Josh]

Okay, the problem is not the textures. The problem is the new material that is being created under the hood. Somehow it is pointing to an invalid texture slot in the shader...

[Josh]

Okay, I was able to identify the cause...sort of. I was getting very aggressive with optimization. Some say too aggressive, but I say not enough.

I'll wait until tomorrow morning to update.