[..] GDI+ Image -> OpenGL Texture

[matwachich]

These days, i'm playing around OpenGL, thankfully to a thread on this forum, I found an UDF containing nearly all the standard OpenGL functions!

My problem now is how to display an image???

The best would be to convert an GDI+ image/bitmap to ang openGL usable texture.

Any example would be much apreciated!

Thanks in advance!

[matwachich]

In this archive is the method I try to use

Can someone check it for mistakes???

Thanks!

NB: I'm working on a 2D Display engin in AutoIt, I done a prototype with GDI+ but it's too slow for huge games (but perfect for small ones!), and now i want to do it with OpenGL

OpenGL.zip

[bogQ]

Did you try to play around with to see if it suit your needs and is it faster than GDI+?

In it you can combine pictures-textures to some lvl, you can draw them to in-engine gui, or directly on engine screen.

For OpenGL Udf, i did not play around with it so i realy dont know, maby its best to post problem in the thread of the one who created that Udf if he dont see your post heare.

Edited May 30, 2011 by bogQ

[matwachich]

Thanks for the reply

I know IrrLicht, and I tested it, it's as fast as openGL, but there are 2 problems:

- I don't want to create dependencies for my GEngin

- I didn't find out how to rotate an 2d image with it!

The best in my opignon would to create a completly portable 2d display engin for and with AutoIt!

[matwachich]

Found This in msdn

void loadImage(wchar_t* file, GLuint tex)
{
    ULONG_PTR token;
    Gdiplus::GdiplusStartupInput input;
    Gdiplus::GdiplusStartup(&token, &input, NULL);
    {
        Gdiplus::Bitmap bmp(file);
        Gdiplus::Rect rect(0,0,bmp.GetWidth(), bmp.GetHeight());
        Gdiplus::BitmapData data;
        bmp.LockBits(&rect, Gdiplus::ImageLockModeRead, PixelFormat32bppARGB, &data);
        glPixelStorei(GL_UNPACK_ROW_LENGTH, data.Width);
        glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
        glBindTexture(GL_TEXTURE_2D, tex);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, data.Width, data.Height, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, data.Scan0);
        bmp.UnlockBits(&data);
    }
    Gdiplus::GdiplusShutdown(token);
}

I tried to convert it to AutoIt without succes.

Any help??? Thanks