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https://github.com/Ryujinx/SDL.git
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b72938c861
An existing hint lets apps that don't need the timer resolution changed avoid this, to save battery, etc, but this fixes several problems in timing, audio callbacks not firing fast enough, etc. Fixes Bugzilla #2944.
130 lines
2.7 KiB
C
130 lines
2.7 KiB
C
/*
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Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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This file is created by : Nitin Jain (nitin.j4@samsung.com)
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*/
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/* Sample program: Draw a Chess Board by using SDL_CreateSoftwareRenderer API */
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#include <stdlib.h>
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#include <stdio.h>
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#ifdef __EMSCRIPTEN__
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#include <emscripten/emscripten.h>
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#endif
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#include "SDL.h"
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SDL_Window *window;
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SDL_Renderer *renderer;
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int done;
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void
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DrawChessBoard(SDL_Renderer * renderer)
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{
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int row = 0,column = 0,x = 0;
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SDL_Rect rect, darea;
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/* Get the Size of drawing surface */
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SDL_RenderGetViewport(renderer, &darea);
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for( ; row < 8; row++)
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{
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column = row%2;
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x = x + column;
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for( ; column < 4+(row%2); column++)
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{
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SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0xFF);
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rect.w = darea.w/8;
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rect.h = darea.h/8;
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rect.x = x * rect.w;
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rect.y = row * rect.h;
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x = x + 2;
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SDL_RenderFillRect(renderer, &rect);
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}
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x=0;
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}
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}
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void
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loop()
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{
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SDL_Event e;
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if (SDL_PollEvent(&e)) {
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if (e.type == SDL_QUIT) {
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done = 1;
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return;
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}
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if(e.key.keysym.sym == SDLK_ESCAPE) {
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done = 1;
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return;
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}
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}
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DrawChessBoard(renderer);
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/* Got everything on rendering surface,
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now Update the drawing image on window screen */
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SDL_UpdateWindowSurface(window);
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}
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int
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main(int argc, char *argv[])
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{
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SDL_Surface *surface;
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/* Enable standard application logging */
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SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
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/* Initialize SDL */
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if(SDL_Init(SDL_INIT_VIDEO) != 0)
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{
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init fail : %s\n", SDL_GetError());
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return 1;
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}
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/* Create window and renderer for given surface */
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window = SDL_CreateWindow("Chess Board", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_SHOWN);
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if(!window)
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{
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Window creation fail : %s\n",SDL_GetError());
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return 1;
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}
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surface = SDL_GetWindowSurface(window);
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renderer = SDL_CreateSoftwareRenderer(surface);
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if(!renderer)
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{
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Render creation for surface fail : %s\n",SDL_GetError());
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return 1;
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}
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/* Clear the rendering surface with the specified color */
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SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xFF, 0xFF);
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SDL_RenderClear(renderer);
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/* Draw the Image on rendering surface */
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done = 0;
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#ifdef __EMSCRIPTEN__
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emscripten_set_main_loop(loop, 0, 1);
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#else
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while (!done) {
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loop();
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}
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#endif
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return 0;
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}
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