[Solved] Texture rendering in osg

[mola]

hello

i want to draw chart on cegui window .
i have sample code to draw chart on osg hud .



http://molaora.ir/wp-content/uploads/2015/02/test_cegui.tar.gz

i want to draw it on cegui::window or image.
or can i draw direct to cegui::texture ?

i write this code too :
i create a button on click i want to see texture with random color but only white image load , why ?

Code: Select all

//    CEGUI::System& ceguiSystem = CEGUI::System::getSingleton();

    CEGUI::Sizef size(static_cast<float>(256.0), static_cast<float>(256.0));

//    CEGUI::TextureTarget* renderTextureTarget = CEGUI::System::getSingletonPtr()->getRenderer()->createTextureTarget();
//    renderTextureTarget->declareRenderSize(size);

//    CEGUI::GUIContext& renderGuiContext = ceguiSystem.createGUIContext(static_cast<CEGUI::RenderTarget&>(*renderTextureTarget) );

    // We create a CEGUI Texture using the renderer you use:
    CEGUI::Texture& texture = CEGUI::System::getSingletonPtr()->getRenderer()->createTexture("MyCEGUITextureName",size);

    CEGUI::Rectf imageArea;
    imageArea= CEGUI::Rectf(0.0f, 0.0f, 256, 256);

    CEGUI::OpenGLTexture& rendererTexture = static_cast<CEGUI::OpenGLTexture&>(texture);

    unsigned char data[ (256*256)*4 ];
    for (int i =0; i<((256*256)*4); i++)
        data[i] = (rand()/ (RAND_MAX*1.0) )*255;

    rendererTexture.blitFromMemory(data, imageArea);
    // We create a BasicImage and set the Texture
    CEGUI::BasicImage* image = static_cast<CEGUI::BasicImage*>(&CEGUI::ImageManager::getSingleton().create("BasicImage", "aoscope/aoscope1"));
    image ->setTexture(&rendererTexture);

        imageArea= CEGUI::Rectf(0.0f, 0.0f, 256, 256);

    image->setArea(imageArea);
    image->setAutoScaled(CEGUI::ASM_Disabled);

    CEGUI::Window* bfft = (CEGUI::Window*)d_root->getChild("AScope");

    CEGUI::Window* fft = (CEGUI::Window*)d_root->getChild("AScope/StaticImage");
    fft->setProperty("Image", "aoscope/aoscope1");


    fft->invalidate();
    bfft->invalidate();


[Ident]

Is it relevant that it is OSG in any way? I don't see the OSG-specificness. Also I think this should go into General Help, not Advanced help. I will move it.

Have you looked at this? http://cegui.org.uk/wiki/index.php?title=Rendering_to_texture_(RTT)_in_CEGUI
I wrote this a while ago and it helped quite a few people.

I see you did most of the things suggested there. Did you try to directly render the texture you created (without CEGUI) and see if it displays correctly?

[dermont]

.. i want to see texture with random color but only white image load , why ?

I don't the answer to your question, could be your data array, some static cast missing on your Vector2. However I had exactly the same problem as you with blitFromMemory trying to load a GStreamer video texture on OpenGL (CEGUI 0.8 I think).

In the end I had to create my own texture and manually update. I don't remember what the problem was (pixel formats) or maybe I just did the same way as you.

Anway looking at my old video texture on 0.8.4 and your code it appears to work here. Maybe you could try the following code with your parent window. The data is just the OpenGl checker example.

Code: Select all

void createTexture(CEGUI::Window *parent)
{
     int width  = 256;
     int height = 256;
       
     CEGUI::Sizef size(static_cast<float>(width), static_cast<float>(height));

     CEGUI::OpenGLRenderer* rs = static_cast<CEGUI::OpenGLRenderer*>(
                    CEGUI::System::getSingleton().getRenderer());

     CEGUI::Texture* texture = &rs->createTexture("Checked",size);

     CEGUI::Rectf imageArea(0.0f, 0.0f, static_cast<float>(width), static_cast<float>(height));

     int i, j, c;
     unsigned char data[256][256][4];

     for (i = 0; i < 256; i++) {
        for (j = 0; j < 256; j++) {
             c = ((((i&0x8)==0)^((j&0x8))==0))*255;
             data[i][j][0] = (GLubyte) c;
             data[i][j][1] = (GLubyte) c;
             data[i][j][2] = (GLubyte) c;
             data[i][j][3] = (GLubyte) 255;
        }
      }

      texture->blitFromMemory(&data[0], imageArea);
      // We create a BasicImage and set the Texture
      CEGUI::BasicImage* image = static_cast<CEGUI::BasicImage*>(&CEGUI::ImageManager::getSingleton().create("BasicImage", "Checked"));
      image ->setTexture(texture);

      image->setArea(imageArea);
      image->setAutoScaled(CEGUI::ASM_Disabled);

      CEGUI::Window* vImage = CEGUI::WindowManager::getSingleton().createWindow("TaharezLook/StaticImage", "StatImage");
      vImage->setSize(CEGUI::USize(CEGUI::UDim(static_cast<float>(width), 0)     , CEGUI::UDim(static_cast<float>(height), 0)));
      vImage->setPosition(CEGUI::UVector2(CEGUI::UDim(0, 0.0), CEGUI::UDim(0, 0.0f)));

      vImage->setProperty("Image", texture->getName());
      parent->addChild(vImage);
}


[mola]

thanks for answer

i run your code but image is white too.
what's wrong ?

[Ident]

Can you use gldebugger or anything like it and check if the texture itself is correct? What happens if you just render the texture directly`?

[mola]

hello,

in this function GL_MAX_TEXTURE_SIZE return zero
and cegui error is "size too big" for textur and no texture created.

[Ident]

I asked two times already, I will try one last time: What happens if you render the texture directly
Is the graph you show below the FrameWindow the texture that is supposed to be inside the FrameWindow? Is that the identical texture? Yes or no?
And if no, did you try to render the texture directly that you supply to CEGUI and how was it rendered then?


Also what is the texture size and why did you not tell us before that there is an error.

We are getting closer to the solution...

[mola]

I found the bug,
when run osg in multithread doesn't work but if run in singlemode it'srun OK,

[mola]

hi again,
when i click button the texture update and show when use timer to update image not update in UI.

Code: Select all

    CEGUI::Texture* texture;
    CEGUI::OpenGLRenderer* rs = static_cast<CEGUI::OpenGLRenderer*>(
                   CEGUI::System::getSingleton().getRenderer());

    texture = &rs->getTexture("RRTaoscope");

    CEGUI::Rectf imageArea(0.0f, 0.0f, static_cast<float>(256), static_cast<float>(256));

    int i, j, c;

    for (i = 0; i < 256; i++) {
       for (j = 0; j < 256; j++) {
            c =  ((((i&0x8)==0)^((j&0x8))==0))*255;
            chartOscope[i][j][0] = (GLubyte) c;
            chartOscope[i][j][1] = (GLubyte) c;
            chartOscope[i][j][2] = (GLubyte) c;
            chartOscope[i][j][3] = (GLubyte) 255;
       }
     }
    texture->blitFromMemory(&chartOscope[0], imageArea);

    CEGUI::Window* fft = (CEGUI::Window*)d_root->getChild("FFTScope/StaticImage");
    fft->invalidate();

    CEGUI::Window* ff = (CEGUI::Window*)d_root->getChild("FFTScope");
    ff->invalidate();



[Ident]

Based on your sentence it is really hard to understand what you are trying to tell us, even after looking at the code. Could you please express yourself in correct English? For now I do not understand what is going on.