Possible PSP improvements

[Plombo]

It's been a while since the PSP was updated with new features.  There have been a couple of things introduced in the last year that the PSP could make good use of:

• The XPM decoder in xpmlib.  Using it, the PSP could do what all of the other platforms do to load the logo menu images, and not have to load from .png files on the filesystem.
• Hardware-accelerated brightness (and possibly gamma) correction using vga_set_color_correction().  The color correction code in openbor.c can be simplified once all platforms support the function - PSP is the only platform I have access to that doesn't support it.

[talic]

It will be nice to have new features in the psp port.
Go for it! 

Quick question:
Is it posibble to add  the feature of shutdown the psp wile playing a mod, and when you turn it on you can continue playing like all the psp games?.

[Plombo]

It will be nice to have new features in the psp port.
Go for it! 

Quick question:
Is it posibble to add  the feature of shutdown the psp wile playing a mod, and when you turn it on you can continue playing like all the psp games?.

Whoops, maybe I wasn't clear enough...I can't do any of this myself because I don't have a PSP.  These are suggestions for SX, who recently started working on OpenBOR again for the time being.

[SX]

The XPM decoder in xpmlib.  Using it, the PSP could do what all of the other platforms do to load the logo menu images, and not have to load from .png files on the filesystem.

I actually prefer to have them in png format.  That way the are released from memory once the engine starts up unlike the other platforms.

Hardware-accelerated brightness

The PSP has dedicated hardware (button) for controlling LCD brightness.  Though I don't think this is what your are referring to....

(and possibly gamma) correction using vga_set_color_correction().  The color correction code in openbor.c can be simplified once all platforms support the function - PSP is the only platform I have access to that doesn't support it.

The hardware support for gamma and color would be interesting....  I would have to look into this to see if its possible.  Should be do-able... since the PSP does use the GPU for blitting OpenBOR's screen data without any conversions.

[Plombo]

The XPM decoder in xpmlib.  Using it, the PSP could do what all of the other platforms do to load the logo menu images, and not have to load from .png files on the filesystem.

I actually prefer to have them in png format.  That way the are released from memory once the engine starts up unlike the other platforms.

Right, I forgot about the memory usage with relation to the PSP's limited memory resources...

Hardware-accelerated brightness

The PSP has dedicated hardware (button) for controlling LCD brightness.  Though I don't think this is what your are referring to....

You're right, it's not.  I mean the brightness that you can set in the video options.  More importantly, it's used for fading the screen at the end of each level.  I assume that screen fading on the PSP (at least in 16/32-bit color mode) is very slow like it used to be on the Wii, since a CPU-intensive darkening operation has to be run on every pixel in every frame when fading.  Implementing vga_set_color_correction() should be able to speed it up to about the same speed as PCs.

(and possibly gamma) correction using vga_set_color_correction().  The color correction code in openbor.c can be simplified once all platforms support the function - PSP is the only platform I have access to that doesn't support it.

The hardware support for gamma and color would be interesting....  I would have to look into this to see if its possible.  Should be do-able... since the PSP does use the GPU for blitting OpenBOR's screen data without any conversions.

As a hint, try looking at the texture environment if there is one available, or a pixel shader otherwise.