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  1. 23 Mar, 2009 3 commits
    • Sam Lantinga's avatar
      Date: Thu, 05 Feb 2009 18:07:35 +0100 · d2d2e1c3
      Sam Lantinga authored 
      From: Stefan Klug
Subject: [SDL] SDL 1.3 WinCE backend

as promised, I've started to work on the WinCE backend of SDL 1.3
I've modified the win32 video backend and the gdi renderer, to work
properly in WinCE.
The results till now are great, but there is still some work to do.

Attached are two patches with my changes.
I would be happy if someone could review and propably commit them.

The first one (configure.in.patch) should be straight forward without
any side effects.

The second one does the necessary changes to the win32 backend. I was
really unhappy to start slicing this shiny new backend with
#ifdef/#endif but I saw no other option.

The most problematic issues are:
- WinCe has no GetDIBits, so its practically impossible to fill a
BITMAPINFO with correct values. I therefore removed the bmi member from
the GDI_RenderData in SDL_gdirender.c to prevent usage of a not or not
properly initialized  bmi.
- In SDL_win32window.c I exchanged some ASCII function by their general
counterparts, (In CE only the Unicode versions are available). I don't
know if this has a negative effect when running in win32


Cheers
Stefan

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    • Sam Lantinga's avatar
      Date: Tue, 17 Feb 2009 14:00:25 +0100 · e403bb29
      Sam Lantinga authored 
      From: Stefan Klug
Subject: [SDL] Possible bug, paused audio playing garbage

On my WinCE device a paused audio device plays random garbage.
This might also be the issue in the thread "sound cracks with SDL_mixer
and AUDIO_S16LSB"

I don't have that much knowledge of the SDL audio part, but the attached
patch fixes it for me, and collapses two redundant ifs.

I'm not sure if this is the correct way to fix this.
Shouldn't the complete stream conversion part of the RunAudio loop be
dependent on the paused property of the device? (not only the call to
(*fill)(udata, istream, istream_len).

Anyways. Would be great if the patch or a fix could find its way to SVN ;-)

Cheers
Stefan

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    • Sam Lantinga's avatar
      Date: Sat, 21 Mar 2009 19:41:52 -0700 (PDT) · 2bacdee0
      Sam Lantinga authored 
      From: Mason Wheeler
Subject: [SDL] Critical SDL 1.3 patch

Displaying a window created with SDL_CreateWindowFrom was causing stack overf
lows for me under certain conditions.  After far too much work trying to get
Visual Studio's debugger to play nice with a program written in Delphi, I tra
cked it down to a nasty reentrancy cycle in the WndProc handling.  Here's a p
atch that fixes the problem

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  3. 22 Mar, 2009 1 commit
  5. 17 Mar, 2009 2 commits
    • Sam Lantinga's avatar
      Fixed iPhone demos · 7a8aae67
      Sam Lantinga authored 
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    • Sam Lantinga's avatar
      Date: Thu, 12 Mar 2009 15:14:38 +0200 · 4d78fdce
      Sam Lantinga authored 
      From: "Mike Gorchak"
Subject: New QNX patches

In photon.tar.gz there are new files to be placed into ./src/video/photon/
directory.

qnx3.diff - new patches for QNX support. Since I've found a lot of bugs in
the new GF QNX Graphics Framework and I'm suspended development for GF
driver until already found bugs will be fixed and switched to Photon driver
implementation.

sdl.diff - I've found that renderer creation result has not been checked and
SDL shows error like: "there is no current renderer", now SDL will show
correct error which was set be renderer.

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  7. 15 Mar, 2009 1 commit
  9. 12 Mar, 2009 1 commit
  11. 06 Mar, 2009 2 commits
  13. 04 Mar, 2009 3 commits
    • Sam Lantinga's avatar
      Date: Wed, 4 Mar 2009 15:38:22 +0200 · ba4c542e
      Sam Lantinga authored 
      From: "Mike Gorchak"
Subject: Re: About QNX support in SDL 1.3

Here is another batch of patches.

1) Makefile.in - added SDL_opengles.h header as header to install.
2) configure.in - Added special define to detect Common Lite OpenGL ES
library in case if Common library is not installed. Added check for
clock_gettime in libc (in QNX it is in libc).
3) SDL_config.h.in - Added SDL_VIDEO_RENDER_OPENGL_ES and
SDL_VIDEO_OPENGL_ES declarations for configure script autodetection.
4) SDL_opengles.h - Added GL_API definition if it is not defined. Added
extension GL_OES_draw_texture because OpenGL ES Renderer uses it without
declaration. Added GL_OES_vertex_buffer_object extension, which is supported
under QNX OpenGL ES. Added GL_OES_single_precision extension.
5) To the test directory I've added building OpenGL ES test applications
through the autotools suite. Was support for iPhone IDE building only.

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    • Sam Lantinga's avatar
      Updated config.guess and config.sub · 7c0777a9
      Sam Lantinga authored 
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    • Sam Lantinga's avatar
      Updated libtool from version 1.5.22 to 2.2.6a, so it works on current QNX · dc650bdd
      Sam Lantinga authored 
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  15. 03 Mar, 2009 2 commits
    • Sam Lantinga's avatar
      Mac OS X and iPhoneOS have the full math library · 160fe5bc
      Sam Lantinga authored 
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    • Sam Lantinga's avatar
      Date: Mon, 2 Mar 2009 16:27:42 +0200 · e87963bb
      Sam Lantinga authored 
      From: "Mike Gorchak"
Subject: About QNX support in SDL 1.3

Right now I'm working on QNX SDL 1.3 drivers implementation and looks like a
lot of code must be completely reworked. But I'm ready for it :) Also I want
to add QNX Graphics Framework SDL driver, which is fullscreen graphics
framework, with support of hardware accelerated OpenGL ES implementations.
This Graphics Framework (called GF in QNX) could also use QNX Photon (window
manager GUI) as window manager.

In the attachment initial patch for QNX support in SDL 1.3

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  17. 27 Feb, 2009 2 commits
  19. 21 Feb, 2009 2 commits
  21. 19 Feb, 2009 5 commits
  23. 18 Feb, 2009 1 commit
  25. 17 Feb, 2009 6 commits
    • Sam Lantinga's avatar
      Fixed bug #684 · aad9f51b
      Sam Lantinga authored 
      Reworked Pierre's patch a little bit, which added SDL_WaitEventTimeout()

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    • Sam Lantinga's avatar
      indent · a0978cdf
      Sam Lantinga authored 
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    • Sam Lantinga's avatar
      Fixed bug #681 · 90b4c693
      Sam Lantinga authored 
         Description From  Philipp   2009-01-16 20:50:01   (-) [reply]

The File test/README from the svn says this:

    testgl        A very simple example of using OpenGL with SDL
    testgl2        Improved version of testgl

It is actually exchanged.

testgl.c is the improved version right now and testgl2.c the simple one.

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    • Sam Lantinga's avatar
      Date: Thu, 27 Dec 2007 07:38:25 +0000 · 605f1db1
      Sam Lantinga authored 
      From: John Bartholomew
Subject: [SDL] SDL Semaphore implementation broken on Windows?
Hi,

Over the past couple of days, I've been battling with SDL, SDL_Mixer and SMPEG to try to find an audio hang bug.  I believe I've found the problem, which I think is a race condition inside SDL's semaphore implementation (at least the Windows implementation).  The semaphore code uses Windows' built in semaphore functions, but it also maintains a separate count value.  This count value is updated with bare increment and decrement operations in SemPost and SemWaitTimeout - no locking primitives to protect them.

In tracking down the apparent audio bug, I found that at some point a semaphore's count value was being decremented to -1, which is clearly not a valid value for it to take.

I'm still not certain exactly what sequence of operations is occuring for this to happen, but I believe that overall it's a race condition between a thread calling SemPost (which increments the count) and the thread on the other end calling SemWait (which decrements it).

I will try to make a test case to verify this, but I'm not sure if I'll be able to   (threading errors being difficult to reproduce even in the best    circumstances).

However, assuming this is the cause of my problems, there is a very
simple fix:
Windows provides InterlockedIncrement() and InterlockedDecrement()
functions to perform increments and decrements which are guaranteed to be atomic.  So the fix is in thread/win32/SDL_syssem.c: replace occurrences of --sem->count with InterlockedDecrement(&sem->count); and replace occurrences of ++sem->count with InterlockedIncrement(&sem->count);

This is using SDL v1.2.12, built with VC++ 2008 Express, running on a
Core 2 duo processor.

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    • Sam Lantinga's avatar
      Fixed bug #633 · d9d69026
      Sam Lantinga authored 
         Description From  Michael Stone   2008-09-25 19:27:29   (-) [reply]

To determine whether a pid is occupied with the kill(pid, 0) idiom, you have to
test

#include <signal.h>
#include <errno.h>
kill(pid, 0) < 0 && errno == ESRCH

not just

#include <signal.h>
kill(pid, 0) < 0

otherwise you get incorrect results when pid is running as a different user
(causing kill(pid, 0) to return -1 + EPERM).

src/audio/alsa/SDL_alsa_audio.c is certainly affected by this bug in both
1.2.13 and 1.3-trunk. It probably occurs in other places as well.

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    • Sam Lantinga's avatar
      Fixed bug #537 · d2e9f851
      Sam Lantinga authored 
      Description From  esigra   2008-01-07 16:20:21   (-) [reply]

I try to get a clean compile for a project using SDL. But I get warnings
from SDL headers when I use -Wold-style-cast. This is especially bad
because I plan to build the software with -Werror=old-style-cast when we
have switched over to GCC 4.2, which has that option.

But this problem can be fixed in the SDL headers. I checked out the SVN
version and made some patches. See the attached patch.

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  27. 15 Feb, 2009 1 commit
  29. 14 Feb, 2009 2 commits
  31. 12 Feb, 2009 1 commit
  33. 09 Feb, 2009 5 commits