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
