Yeah, I just checked the source. It is -s USE_SDL=2 ... there were conflicting things written in some of the email threads.
Anyway, while I don't know much (anything) about SDL, I would guess that it is because you're not using an event loop and just blocking in main and SDL probably needs to run the event loop to perform the work. Couple that with the SDL_Delay(6000) and that's probably why it waits 6 seconds ... If not, someone who actually know about SDL will have to chime in. :) - Bruce On Sat, Nov 8, 2014 at 5:38 PM, bussiere adrien <[email protected]> wrote: > When i put -s USE_SDL2=1 > > 02_getting_an_image_on_the_screen.cpp:5:10: fatal error: 'SDL2/SDL.h' file > not > found > #include <SDL2/SDL.h> > ^ > 1 error generated. > ERROR root: compiler frontend failed to generate LLVM bitcode, halting > > > Le samedi 8 novembre 2014 11:30:09 UTC+1, Bruce Mitchener a écrit : >> >> Try -s USE_SDL2=1 >> >> Cheers, >> >> - Bruce >> >> >> On Sat, Nov 8, 2014 at 5:00 PM, bussiere adrien <[email protected]> >> wrote: >> >>> hello >>> i would like to know if someone have time why my simple sdl2 c++ program >>> don't works as intended in html >>> https://gist.github.com/bussiere/c9828f513ddae1f554e7 >>> it only show the second image after six seconds >>> the compiled binary worked as intended >>> thanks >>> >>> Bussiere >>> >>> code below : >>> >>> /*This source code copyrighted by Lazy Foo' Productions (2004-2013) >>> and may not be redistributed without written permission.*/ >>> /* >>> i compile it with : >>> >>> /home/bussiere/Lib/emsdk_portable/emscripten/master/./emcc >>> 02_getting_an_image_on_the_screen.cpp -s USE_SDL=2 -s LEGACY_GL_EMULATION=1 >>> -o sdl2.html --preload-file hello_world.bmp --preload-file hello_world2.bmp >>> >>> and the html file only who the second image after six econd of blank >>> >>> >>> */ >>> >>> >>> //Using SDL and standard IO >>> #include <SDL2/SDL.h> >>> #include <stdio.h> >>> #ifdef __EMSCRIPTEN__ >>> #include <emscripten.h> >>> #endif >>> //Screen dimension constants >>> const int SCREEN_WIDTH = 640; >>> const int SCREEN_HEIGHT = 480; >>> >>> //Starts up SDL and creates window >>> bool init(); >>> >>> //Loads media >>> bool loadMedia(); >>> >>> //Frees media and shuts down SDL >>> void close(); >>> >>> //The window we'll be rendering to >>> SDL_Window* gWindow = NULL; >>> //The surface contained by the window >>> SDL_Surface* gScreenSurface = NULL; >>> >>> //The image we will load and show on the screen >>> SDL_Surface* gHelloWorld = NULL; >>> >>> SDL_Surface* gHelloWorld2 = NULL; >>> >>> bool init() >>> { >>> //Initialization flag >>> bool success = true; >>> >>> //Initialize SDL >>> if( SDL_Init( SDL_INIT_VIDEO ) < 0 ) >>> { >>> printf( "SDL could not initialize! SDL_Error: %s\n", >>> SDL_GetError() ); >>> success = false; >>> } >>> else >>> { >>> //Create window >>> gWindow = SDL_CreateWindow( "SDL Tutorial", >>> SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, >>> SCREEN_HEIGHT, SDL_WINDOW_SHOWN ); >>> if( gWindow == NULL ) >>> { >>> printf( "Window could not be created! SDL_Error: %s\n", >>> SDL_GetError() ); >>> success = false; >>> } >>> else >>> { >>> //Get window surface >>> gScreenSurface = SDL_GetWindowSurface( gWindow ); >>> } >>> } >>> >>> return success; >>> } >>> >>> bool loadMedia() >>> { >>> //Loading success flag >>> bool success = true; >>> >>> //Load splash image >>> gHelloWorld = SDL_LoadBMP( "hello_world.bmp" ); >>> if( gHelloWorld == NULL ) >>> { >>> printf( "Unable to load image %s! SDL Error: %s\n", >>> "02_getting_an_image_on_the_screen/hello_world.bmp", SDL_GetError() ); >>> success = false; >>> } >>> >>> gHelloWorld2 = SDL_LoadBMP("hello_world2.bmp" ); >>> if( gHelloWorld2 == NULL ) >>> { >>> printf( "Unable to load image %s! SDL Error: %s\n", >>> "02_getting_an_image_on_the_screen/hello_world.bmp", SDL_GetError() ); >>> success = false; >>> } >>> >>> return success; >>> } >>> >>> void close() >>> { >>> >>> >>> >>> SDL_FreeSurface( gHelloWorld2 ); >>> gHelloWorld2 = NULL; >>> >>> //Destroy window >>> SDL_DestroyWindow( gWindow ); >>> gWindow = NULL; >>> >>> //Quit SDL subsystems >>> SDL_Quit(); >>> } >>> >>> int main( int argc, char* args[] ) >>> { >>> //Start up SDL and create window >>> if( !init() ) >>> { >>> printf( "Failed to initialize!\n" ); >>> } >>> else >>> { >>> //Load media >>> if( !loadMedia() ) >>> { >>> printf( "Failed to load media!\n" ); >>> } >>> else >>> { >>> //Apply the image >>> SDL_BlitSurface( gHelloWorld, NULL, gScreenSurface, >>> NULL ); >>> //Update the surface >>> SDL_UpdateWindowSurface( gWindow ); >>> >>> //Wait two seconds >>> SDL_Delay( 6000 ); >>> SDL_FreeSurface( gHelloWorld ); >>> gHelloWorld = NULL; >>> //Apply the image >>> SDL_BlitSurface( gHelloWorld2, NULL, gScreenSurface, >>> NULL ); >>> //Update the surface >>> SDL_UpdateWindowSurface( gWindow ); >>> >>> //Wait two seconds >>> SDL_Delay( 2000 ); >>> } >>> } >>> >>> //Free resources and close SDL >>> close(); >>> >>> return 0; >>> } >>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "emscripten-discuss" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- > You received this message because you are subscribed to the Google Groups > "emscripten-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. 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