On 2013-08-10, at 6:37 AM, Kartik Thakore wrote: > Thanks mason, > > Can you make these feature requests as issues on > http://github.com/PerlGameDev/SDL2 >
yes, will do :) > > On Fri, Aug 9, 2013 at 2:25 PM, Mason James <m...@kohaaloha.com> wrote: > > hi sdl-devel > > i am planning/researching about adding a small amount of SDL2_Perl code into > my existing SDL_Perl app, for a framerate increase > i have one long-standingly slow bit of code in my app, that i would like to > replace with SDL2 code > > my slow code is a SDL::GFX::Rotozoom::surface() call. but SDL2 has 'hardware > accelerated' stretching/scaling/zooming [1], yay! > > > i checked the SDL2 version of ./SDL2_rotozoom.c, and it is still using the > current slow software method (no changes) > but the good news is… there seems to be a preferred method to achieve this > fast hardware scaling in SDL2 > > SDL2's SDL_RenderCopyEx() function [2] will scale a texture using a fast HW > method, (but...i have not benchmarked my theory yet) > > > my plan is to attempt to add some missing SDL2 functionality to SDL2_Perl. > then swap my slow SDL::GFX::Rotozoom::surface() call, with the faster SDL2 > equivalent > > so basically, i need to implement the 'test/testrendercopyex.c' demo [3], in > SDL2_Perl, > and add access to these missing SDL2 functions in SDL2_Perl... > > SDL_LoadBMP(), > SDL_CreateTextureFromSurface(), > SDL_FreeSurface() > SDL_RenderGetViewport() > SDL_CreateTexture() > SDL_SetRenderTarget() > SDL_RenderCopy() > SDL_RenderCopyEx(), > SDL_QueryTexture() > > > > fyi: the testrendercopyex.c demo is nice and simple, it... > > - loads a .bmp file to a surface > - converts the surface to a HW texture > - then randomly moves, rotates and scales that texture around the window, in > a loop > > i believe this demo is using the new hardware-accelerated scaling on a > 'texture' in SDL2 > > > [1] http://wiki.libsdl.org/moin.fcg/Introduction > [2] http://wiki.libsdl.org/moin.fcg/SDL_RenderCopyEx > [3] http://hg.libsdl.org/SDL/file/90ff13467550/test/testrendercopyex.c > > any comments or suggestions, folks? > > > cheers, Mason > > cheers, Mason -- KohaAloha, NZ
