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Bug 628 - SDL_VIDEO_WINDOW_POS, Mac OS X, OpenGL
Summary: SDL_VIDEO_WINDOW_POS, Mac OS X, OpenGL
Status: RESOLVED FIXED
Alias: None
Product: SDL
Classification: Unclassified
Component: video (show other bugs)
Version: 1.2.13
Hardware: PowerPC Mac OS X (All)
: P2 normal
Assignee: Ryan C. Gordon
QA Contact: Sam Lantinga
URL:
Keywords: target-1.2.14
Depends on:
Blocks:
 
Reported: 2008-09-22 03:48 UTC by Ryan C. Gordon
Modified: 2009-09-29 06:08 UTC (History)
1 user (show)

See Also:

Attachments
Reproduction case. (430 bytes, text/plain)
2008-09-22 03:51 UTC, Ryan C. Gordon 		Details
View All Add an attachment (proposed patch, testcase, etc.)

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Description Ryan C. Gordon 2008-09-22 03:48:51 UTC 
If you try to force the window position with the SDL_VIDEO_WINDOW_POS environment variable, the Quartz backend will incorrectly set the GL viewport and scissor inside a Cocoa call.

Running this under OpenGL Profiler and setting a breakpoint on glScissor shows us this is the culprit:

        [ gl_context setView: window_view ];

...in QZ_SetVideoWindowed().

--ryan.
Comment 1 Ryan C. Gordon 2008-09-22 03:51:16 UTC 
Created attachment 280 [details]
Reproduction case.

Attached a test program that illustrates this. The whole window should be red, but just a corner is, due to the incorrect scissoring.

To compile:

  gcc -Wall -O0 -g -o test SDL-test-broken-window-position-opengl.c `sdl-config --cflags --libs` -framework OpenGL

--ryan.
Comment 2 Ryan C. Gordon 2008-09-22 05:59:44 UTC 
(Actually, this isn't just the viewport and scissor, it also becomes the mouse area...you get SDL_APPMOUSEFOCUS events as you move in and out of that viewport.)

--ryan.
Comment 3 Rene Dudfield 2009-05-26 23:30:45 UTC 
hi,

it seems that SDL_VIDEO_WINDOW_POS doesn't work on OSX.

If I move it off the x coordinate, then shows white screen on the left side of the window by the same amount.  This is with x=300, y=0 for example -- there is white on the window for 300 pixels across.

Moving it on the y axis I get a bus error.


with last stable... SDL 1.2.13,   OSX 10.5.7

Tested with pygame 1.9.0pre.
Comment 4 Rene Dudfield 2009-05-27 00:23:45 UTC 
hi again,


It looks like the parent window isn't moved with the main SDL window.

The bus error crashes with SDL_FillRect if I change the y coordinate.

This is the file where SDL_VIDEO_WINDOW_POS is inspected...
src/video/quartz/SDL_QuartzVideo.m


It looks like the patch addresses it using some carbon calls:
   http://www.nabble.com/-patch--OS-X-carbon-SDL_WINDOWID-support-td6457591.html

Haven't tried the patch though.

export SDL_VIDEO_WINDOW_POS="0,0" works ok, since then the parent window doesn't need to be modified... as it starts off at 0,0 by default.

ps.  SDL_VIDEO_CENTERED=1 works fine.
Comment 5 Ryan C. Gordon 2009-09-13 16:33:11 UTC 
Tagging this bug with "target-1.2.14" so we can try to resolve it for SDL 1.2.14.

Please note that we may choose to resolve it as WONTFIX. This tag is largely so we have a comprehensive wishlist of bugs to examine for 1.2.14 (and so we can close bugs that we'll never fix, rather than have them live forever in Bugzilla).

--ryan.
Comment 6 Ryan C. Gordon 2009-09-29 06:08:15 UTC 
Fixed in svn revision #4890.

--ryan.