Comments on: SDL Scale Surface http://www.sdltutorials.com/sdl-scale-surface/ SDL Tutorials - Game Tutorials - Programming Tutorials Wed, 10 Mar 2010 21:10:26 +0000 http://wordpress.org/?v=2.9.1 hourly 1 By: Johnny(TM) http://www.sdltutorials.com/sdl-scale-surface/comment-page-1/#comment-4671 Johnny(TM) Sat, 25 Jul 2009 09:32:22 +0000 http://www.sdltutorials.com/sdl-scale-surface/#comment-4671 This code works well, but if I try to scale a surface that has a 256 color palette, it returns a black surface. Why does it happen, and how can I fix it? My ReadPixel and DrawPixel function is a copy from the link in the tutorial. This code works well, but if I try to scale a surface that has a 256 color palette, it returns a black surface. Why does it happen, and how can I fix it? My ReadPixel and DrawPixel function is a copy from the link in the tutorial.

]]> By: Philip http://www.sdltutorials.com/sdl-scale-surface/comment-page-1/#comment-3059 Philip Thu, 28 May 2009 15:25:11 +0000 http://www.sdltutorials.com/sdl-scale-surface/#comment-3059 Instead of x_scale*y_scale calls to DrawPixel for each source pixel, why not a single call to SDL_FillRect? Instead of x_scale*y_scale calls to DrawPixel for each source pixel, why not a single call to SDL_FillRect?

]]> By: Creature http://www.sdltutorials.com/sdl-scale-surface/comment-page-1/#comment-509 Creature Tue, 26 Aug 2008 18:43:52 +0000 http://www.sdltutorials.com/sdl-scale-surface/#comment-509 Yeah, I know it isn't the fastest thing around and there probably could be some optimizations like declaring x, y, o_y and o_x before the first for-loop so they don't have to get created over and over again. The second argument of DrawPixel could also be calculated in the third for-loop instead of the fourth, now it has to be calculated over and over again as well. But anyway, it was just for learning practices :). Yeah, I know it isn’t the fastest thing around and there probably could be some optimizations like declaring x, y, o_y and o_x before the first for-loop so they don’t have to get created over and over again. The second argument of DrawPixel could also be calculated in the third for-loop instead of the fourth, now it has to be calculated over and over again as well. But anyway, it was just for learning practices :) .

]]> By: Tim Jones http://www.sdltutorials.com/sdl-scale-surface/comment-page-1/#comment-440 Tim Jones Wed, 20 Aug 2008 12:37:55 +0000 http://www.sdltutorials.com/sdl-scale-surface/#comment-440 Andre, I haven't had a chance to test it out, but I thought it was a good start to show people a method of how to scale a surface. Anyway, if you really wanted rotation/scaling I would take the leap to OpenGL. Otherwise, you're going to take huge performance hits no matter what library you use (and I would choose SPriG over SDL_gfx). Andre,

I haven’t had a chance to test it out, but I thought it was a good start to show people a method of how to scale a surface. Anyway, if you really wanted rotation/scaling I would take the leap to OpenGL. Otherwise, you’re going to take huge performance hits no matter what library you use (and I would choose SPriG over SDL_gfx).

]]> By: Andre Botelho http://www.sdltutorials.com/sdl-scale-surface/comment-page-1/#comment-420 Andre Botelho Thu, 14 Aug 2008 14:11:04 +0000 http://www.sdltutorials.com/sdl-scale-surface/#comment-420 I've tryed this code but it is a lot slow, othes SDL libs like Sprig or SDL_gfx are better choices but this here is good to learn how it works. Good work. I’ve tryed this code but it is a lot slow, othes SDL libs like Sprig or SDL_gfx are better choices but this here is good to learn how it works.
Good work.

]]> By: Creature http://www.sdltutorials.com/sdl-scale-surface/comment-page-1/#comment-400 Creature Tue, 15 Jul 2008 18:52:31 +0000 http://www.sdltutorials.com/sdl-scale-surface/#comment-400 I'd rather prefer Creature, but Mod J is fine too :P. I’d rather prefer Creature, but Mod J is fine too :P .

]]> By: Tim Jones http://www.sdltutorials.com/sdl-scale-surface/comment-page-1/#comment-399 Tim Jones Tue, 15 Jul 2008 18:08:02 +0000 http://www.sdltutorials.com/sdl-scale-surface/#comment-399 I could have sworn I put the other guys name in, fixed now. I could have sworn I put the other guys name in, fixed now.

]]> By: Arseniy Banayev http://www.sdltutorials.com/sdl-scale-surface/comment-page-1/#comment-392 Arseniy Banayev Tue, 15 Jul 2008 16:47:59 +0000 http://www.sdltutorials.com/sdl-scale-surface/#comment-392 Did I really write that? Did I really write that?

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