Re: [Mesa3d-users] Mesa compilation using EABI toolchain

[Brian P. <bri...@tu...>]

iluvlinux wrote:
> EABI toolchain is new toolchain provided by ARM 
> http://wiki.debian.org/ArmEabiPort http://wiki.debian.org/ArmEabiPort 
> 
> and clutter is a library that provides simple apis to users who don't know
> about opengl and related stuff
> http://clutter-project.org/ http://clutter-project.org/ 
> 
> 
> I did a hexdump of some test images in totally red, or green or blue color,
> and i found that the pixel values were accurate according to the images. I
> have no idea were to look into mesa code. i did hexdump in clutter code just
> before it calls glTexImage2D.
> 
> 
> Here are some information related to EABI todo list
> http://wiki.debian.org/ArmEabiTodo http://wiki.debian.org/ArmEabiTodo 
> 
> 
> i have no idea about how to compile mesa with some different options ,all i
> did to compile mesa is to type "make linux" and it builds cleanly.
> 
> if you could just help me out by providing some compile options if needed
> with the new tool chain, i would be highly thankful to you. I know i am
> asking something that is very difficult.

I kind of doubt the bug is in Mesa at this point.  Mesa's glTexImage 
functions are used a _lot_ so they should be pretty solid.

If you suspect that image data is corrupt, you could set a breakpoint at 
glTexImage2D() and examine the image buffer at that point.  For simple 
formats like GL_RGBA/GL_UNSIGNED_BYTE, it's pretty easy to inspect the 
hexadecimal image values.

-Brian


> kindly help
> 
> 
> thanks for your reply 
> varun
> 
> 
> 
> 
> 
> Brian Paul wrote:
>> iluvlinux wrote:
>>> hi
>>>
>>> i compiled mesa with new Linux EABI toolchain 
>>> i am using mesa as a libclutter backend
>> I've never heard of those things.
>>
>>
>>> But when I try to run a application which contains some images (.jpg and
>>> .pngs)
>>>  i can only view some colored rectangles instead of images
>>>
>>> earlier with gnuhash toolchain, the application runs fine, i just
>>> switched
>>> to new EABI toolchain and every thing messed up.
>>>
>>> Also i want to know how mesa loads image file, it has its own
>>> architecture
>>> or it uses some other library as libjpeg etc.
>> Mesa is an implementation of OpenGL and has no functions for 
>> reading/writing image files whatsoever.
>>
>> Typically, a utility library is used to read/decompress an image file 
>> into a malloc'd block of memory.  That memory/image can then be handed 
>> to OpenGL via glTexImage, or glDrawPixels, etc. for rendering/drawing.
>>
>> If you're working with jpegs, I suspect libjpeg is being used.
>>
>> -Brian
>>
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>