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Fixed bug #526 Comment #1 From Simon Howard 2009-03-20 16:50:56 Hi, I'm the author of Chocolate Doom, one of the other source ports that James mentioned. This is a patch against the current SVN version of SDL 1.2 that fixes the bug. It has been tested and hopefully should be obviously correct from examining the changes. I'll give a brief explanation. When the palette is set with SDL_SetPalette, the IDirectDrawPalette_SetEntries DirectX function is invoked. However, when this happens, a WM_PALETTECHANGED message is sent to the window. A WM_PALETTECHANGED message can also be received if the palette is changed for some other reason, like if the system palette is changed. Therefore, the palette change handler (DX5_PaletteChanged) has code to deal with this case. It distinguishes "expected" palette changes (set with SDL_SetPalette) from "unexpected" palette changes using the colorchange_expected variable, which is set before calling IDirectDrawPalette_SetEntries. However, the code to set this variable is missing in the fullscreen code path. By setting this variable, the palette change is handled properly and the freezes go away.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 13 Apr 2009 00:53:12 +0000
parents 355632dca928
children
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>Chapter 8. Events</H1
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>SDL Event Structures.</A
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>Introduction</H1
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>Event handling allows your application to receive input from the user. Event handling is initalised (along with video) with a call to:
<PRE
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Internally, SDL stores all the events waiting to be handled in an event queue. Using functions like <A
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> you can observe and handle waiting input events.</P
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>The key to event handling in SDL is the <A
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> union. The event queue itself is composed of a series of <SPAN
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> unions, one for each waiting event. <SPAN
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> unions are read from the queue with the <TT
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