mirror of
https://github.com/Relintai/sdl2_frt.git
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0e45984fa0
The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
135 lines
2.9 KiB
C
135 lines
2.9 KiB
C
/*
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Copyright (C) 1997-2015 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 = 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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}
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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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while (SDL_PollEvent(&e)) {
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if (e.type == SDL_QUIT) {
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done = 1;
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#ifdef __EMSCRIPTEN__
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emscripten_cancel_main_loop();
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#endif
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return;
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}
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if ((e.type == SDL_KEYDOWN) && (e.key.keysym.sym == SDLK_ESCAPE)) {
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done = 1;
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#ifdef __EMSCRIPTEN__
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emscripten_cancel_main_loop();
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#endif
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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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