Re: [PyOpenGL-Users] OpenGL textures

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yes PIL works great, this is how i've done it:

def loadImage(imageName):
     from Image import open

     im = open(imageName)
     try:
         ix, iy = im.size[0], im.size[1]
         image = im.tostring("raw", "RGBA", 0, -1)
     except SystemError:
         ix, iy = im.size[0], im.size[1]
         image = im.tostring("raw", "RGBX", 0, -1)

     return ix, iy, image

def createTexture(imageName):
     w, h, image = loadImage(imageName)

     id = glGenTextures(1)
     glBindTexture(GL_TEXTURE_2D, id);
     glPixelStorei(GL_UNPACK_ALIGNMENT, 1)
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, 
image)

     return id


Andrew Wilson wrote:
> You may want to give PIL a shot.
> http://www.pythonware.com/products/pil/
> Thanks
> Andrew
> 
> 
> 
> 
> 
> On 3/29/07, * Matthew Morris* <mj...@ms... 
> <mailto:mj...@ms...>> wrote:
> 
>     Maybe make a new buffer: RGB_RGB_RGB_.....  and fill in the blanks
>     with the data from GetAlpha(). But there might be a better way, who
>     knows.
> 
>     -Matt
> 
> 
>     On 3/29/07, * altern* <al...@gm... <mailto:al...@gm...>>
>     wrote:
> 
>         you are right i just discovered that. I can see as well that
>         there is a
>         way to get the alpha info
>         image.GetAlpha()
>         but i am not sure how to use this two different types of data to
>         construct a valid opengl texture with alpha.
> 
>         Matthew Morris(e)k dio:
>>  Doesn't image.GetData () return RGB, and not RGBA, data?
>>
>>  On 3/29/07, *altern* <al...@gm...
>         <mailto:al...@gm...> <mailto: al...@gm...
>         <mailto:al...@gm...>>> wrote:
>>
>>     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...>
>>     <mailto: al...@gm... <mailto:al...@gm...>>
>         <mailto: al...@gm... <mailto:al...@gm...>
>>     <mailto: 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
>>      >
>>      >
>>      >
>>    
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