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pointers to HDC question

General and Gameplay Programming Programming

Started by harmless October 22, 2003 12:29 PM

4 comments, last by harmless 20 years, 6 months ago

harmless

139

Author

October 22, 2003 12:29 PM

Hi everyone, yet another GDI question... how do i know if 2 pointers point to a common HDC?

My UI Engine at Work (Demo as of 11-Sept-2007)

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October 22, 2003 12:37 PM

Huh?

RuneLancer

253

October 22, 2003 12:37 PM

if(lpPointer1 == lpPointer2)...

October 22, 2003 05:27 PM

wouldn''t that be?

if(*lpPointer1 == *lpPointer2)...

zealouselixir

256

October 22, 2003 05:31 PM

AP''s got it. Why are you storing and/or passing pointers to HDCs anyway? Under the facade, HDCs are pointers, and are the same size as pointers to HDC. Just use standard semantics.

[twitter]warrenm[/twitter]

Dredge-Master

175

October 22, 2003 07:48 PM

backing up the data in an array - eg multiple opengl rendering contexts in the same thread, or when two or more programs/threads share HDCs. that''s from experience anyway. lots of other reasons (another is when the HDC''s pointer may change whilst another more laggy thread is trying to update it - although that''s a bad thing for the HDC though)

Beer - the love catalystgood ol' homepage

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