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matwachich

[..] GDI+ Image -> OpenGL Texture

5 posts in this topic

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!

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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

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#3 ·  Posted (edited)

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 by bogQ

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Au3 oIrrlicht - Irrlicht project
Au3impact - Another 3D DLL game engine for autoit. (3impact 3Drad related)



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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!

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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

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