Re: [PyOpenGL-Users] OpenGL textures
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Re: [PyOpenGL-Users] OpenGL textures
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From: altern <al...@gm...> - 2007-03-29 17:41:06
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ok, now i see that it is RGB and not RGBA format, so by doing GL_RGB instead of GL_RGBA i get the texture ok but with no alpha channel. gluBuild2DMipmaps(GL_TEXTURE_2D, 4, w, h, GL_RGB, GL_UNSIGNED_BYTE, bin) altern(e)k dio: > thanks andrew, i dont know how i did not find this myself, i was looking in > wxBitmap class for this type of function. > still i dont get the images properly displayed. I can see it has similar > colors as the original but it is heavily pixelated. Is there any > difference in the format of the image data array itself between wx and > pygame? > > Andrew Wilson(e)k dio: >> Hello, >> You may want to try, >> >> bin = image.GetData() >> >> >> Thanks >> andrew >> >> >> >> On 3/29/07, *altern* < al...@gm... <mailto:al...@gm...>> >> wrote: >> >> hi >> >> I am trying to translate a pygame+opengl application to wx+opengl. >> And I >> am stuck at the function to import images to create OpenGL textures. >> >> I already asked for help on the wxpython list, but nobody seemed >> to be >> interested on my problem, so i thought there might be some >> wx-pyopengl >> users in the pyopengl list. >> >> This is the pygame code: >> >> surface = pygame.image.load(path) >> if surface.get_alpha is None: >> surface = surface.convert() >> else: >> surface = surface.convert_alpha () >> bin = pygame.image.tostring(surface, "RGBA", 1) >> w, h = surface.get_width(), surface.get_height() >> textid = glGenTextures(1) >> glBindTexture(GL_TEXTURE_2D, textid) >> gluBuild2DMipmaps(GL_TEXTURE_2D, 4, w, h, GL_RGBA, GL_UNSIGNED_BYTE, >> bin) >> ... and so on ... >> >> and this is the wx code i am using : >> >> image = wx.Image(path, wx.BITMAP_TYPE_ANY, -1) >> bin = image.ConvertToBitmap() >> w,h = image.GetWidth(), image.GetHeight() >> textid = glGenTextures(1) >> glBindTexture(GL_TEXTURE_2D, textid) >> gluBuild2DMipmaps(GL_TEXTURE_2D, 4, w, h, GL_RGBA, GL_UNSIGNED_BYTE, >> bin) >> ... etc ... >> >> It doesnt crash but the texture that OpenGL displays in not at all >> the >> image i am importing but some weird random colors. I guess this is >> the >> bit that i am missing, since printing "image.ConvertToBitmap()" >> returns >> a wxBitmap instance and not the image data >> bin = pygame.image.tostring(surface, "RGBA", 1) >> >> I have been trying to find out how to access the data an looking for >> examples on the net but did not find anything. >> >> any tips? thanks! >> >> enrike >> >> >> >> ------------------------------------------------------------------------- >> Take Surveys. Earn Cash. Influence the Future of IT >> Join SourceForge.net's Techsay panel and you'll get the chance to >> share your >> opinions on IT & business topics through brief surveys-and earn cash >> >> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >> >> <http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV> >> >> _______________________________________________ >> PyOpenGL Homepage >> http://pyopengl.sourceforge.net <http://pyopengl.sourceforge.net> >> _______________________________________________ >> PyOpenGL-Users mailing list >> PyO...@li... >> <mailto:PyO...@li...> >> https://lists.sourceforge.net/lists/listinfo/pyopengl-users >> >> > > > |
