Now, a note about the actual issue. Destination alpha tests can be used on the GS as one of the workarounds for a lack of stencils. If you use a destination alpha test and leave alpha writing on, the GS will only write each pixel until you write an alpha value which would fail the test. This works to a point in gsdx without further hacking, but that point is when within a single batch of primitives the same pixels are written multiple times and the destination alpha test is expected to update. I did experimentally make a tight loop updating the stencil with a draw then drawing for one primitive at a time, but it was prohibitively slow (over 80% fps loss, you really don't want to know).
Destination alpha testing cannot be directly implemented in D3D9 or D3D10, but (probably) can in D3D11 (with a speed hit for sure, but I doubt it'll be 80%). I'll be getting a new graphics card and looking into that.
And before some idiot says it, the answer is no. OpenGL does not help.
git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5346 96395faa-99c1-11dd-bbfe-3dabce05a288
This may make gsdx slightly slower for everyone (I don't know an easy way to restrict this to affected systems), especially if using 8-bit textures.
git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5341 96395faa-99c1-11dd-bbfe-3dabce05a288
So, in the end I only properly understood the old code after finding all the problems with my version. I'm not sure whether any changes I've made are improvements any more, I'll need to review it with what I've learned in mind. This effort might've been a big waste of time.
git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5329 96395faa-99c1-11dd-bbfe-3dabce05a288
GSDX: (Old bug) When looking up a texture in the cache, the check didn't take into account CLUT formats, nor did it skip this check when "8 bit textures" is enabled.
git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5292 96395faa-99c1-11dd-bbfe-3dabce05a288
Another refinement to the Wild Arms hack by KrossX.
The hack now only applies to one kind of geometry (sent using the unpacked UV handler).
This works nicer in Wild Arms as it fixes "jumpy" characters.
git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5124 96395faa-99c1-11dd-bbfe-3dabce05a288
Adding KrossX's Wild Arms text alignment hack to the new dialog box. This hack is actually very interesting for a number of games. It should work well in cases where game designers adjusted everything pixel perfect for the GS, that usually breaks with upscaling.
It should be generalized and renamed later.
git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5120 96395faa-99c1-11dd-bbfe-3dabce05a288
Committing a hack KrossX prepared (thanks) ;)
It can be used to fix bad character sprites in Gust games.
git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5101 96395faa-99c1-11dd-bbfe-3dabce05a288
gregory.hainaut