Tala

I uploaded a new version 31-12-04:

-fixed the white bars bug
-fixed a bug where the Application gets flooded by WM_PAINT messages
-fixed the bug where parts of the image is cut off when switching landscape/portrait
-fixed a bug, where only the upper left corner accepted the change to pause mode
-some performance improvements

Landscape mode is slightly faster than portrait mode.

Tala

24va

with OpenGL ES, we should not need the GAPI tweak by Picard should we?

Tala

Quote:

with OpenGL ES, we should not need the GAPI tweak by Picard should we?

Using Picards GAPI driver has no effect. It is a native VGA application now using OpenGL ES for screen rendering.

Tala

SeanX

Originally Posted by Tala

The OpenGL build needs to convert the frambuffer into a texture(which has a really strange format) and renders the texture to a quad using bilinear filtering. The conversion to a texture format is done in software and takes about 5.6ms using a custom assembly routine, while the second step is done in hardware and is almost neglible. I first used the standard OpenGL implementation of texture conversion and almost gave up, since it took 34ms!!! Then i wrote the conversion in assembly and it was much faster :) Tala

How are you converting the texture?

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Tala

Quote:

How are you converting the texture?

It was basically reverse engineering. I loaded up a texture using glTexImage2d(). Then i observed how the texture was stored in graphics memory. Then i could write a custom routine, which loads a 256x256 texture directly into graphics memory including conversion, which was about 7 times faster.

Btw, do you know how to enable a synchronous eglSwapBuffers? To my surprise i get tearing artifacts. I first thought it was because the texture cache may hold old texels after loading a texture but upon closer examination it was because of a not synchronous eglSwapBuffers.

Tala

Tala

I made 2 Screenshots to give you an impression how the image quality has improved:

QVGA/Pixel doubled Version:


VGA/OpenGL Version:


Tala

jagnon

thanks tala! the new version seems much more stable with no more UI graphics glitches..

SeanX

Originally Posted by Tala

It was basically reverse engineering. I loaded up a texture using glTexImage2d(). Then i observed how the texture was stored in graphics memory. Then i could write a custom routine, which loads a 256x256 texture directly into graphics memory including conversion, which was about 7 times faster. Btw, do you know how to enable a synchronous eglSwapBuffers? To my surprise i get tearing artifacts. I first thought it was because the texture cache may hold old texels after loading a texture but upon closer examination it was because of a not synchronous eglSwapBuffers. Tala

I don't get the tearing with my game. It may just because I am only running at 30fps, but it all seems fine. I did have some problems early on, but that was becuase I was calling eglSwapBuffers twice instead of once DOH.

Totally gratuitous iimage attached. How do you post large images? I can only post upto 450*450.

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medictom

All I know is that Zelda: A Link to the Past looks great on this, I even got Tecmo Super Bowl 3 running at a great speed with some interesting cartoonish sounds, but still it is pretty awesome to be able to play. Nice Work!!!

R0ninBlade

does this work with the X30's?

javageek

Originally Posted by Tala

I made 2 Screenshots to give you an impression how the image quality has improved: QVGA/Pixel doubled Version: http://ambox.bei.t-online.de/tala/SampleNormal.jpg VGA/OpenGL Version: http://ambox.bei.t-online.de/tala/SampleOpenGL.jpg Tala

What game is that?

Un[R]egistered

Originally Posted by R0ninBlade

does this work with the X30's?

LMAO, HAHAHAH.. AHAHAH... AHAH...... HAH.... hah.......... no. heheh.

javageek: Chrono Trigger.

Great job, Tala! It looks fantastic! :approve:

Tala

New version is here (01-04-05)

-fixed a bug where the window had no focus initially (and did not get keyboard input)
-fixed a bug where the emulator crashed when switching orientation and no game was loaded
-added possibility to make screenshots (quick hack to make the screenshots i posted here and is not fully tested)

Most importantly i did some special timing optimizations for framskip 1. This is for all games and only those, which can run with frameskip 1 and sustain 30fps. The result is (mostly) smooth scrolling synchonized to screen refresh. I am interested how this works for you.

Tala

jagnon

Tested the new version with Parodious.. framerate is 5-6 frames faster now.. thanks for the continued work Tala!

YodaEXE

Lol this looks good but I'll just stick with Morphgear. It's easier cause it can play all my games.