mirror of
https://git.do.srb2.org/STJr/SRB2.git
synced 2024-12-02 01:03:50 +00:00
138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/*
|
|
Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely.
|
|
|
|
This file is created by : Nitin Jain (nitin.j4@samsung.com)
|
|
*/
|
|
|
|
/* Sample program: Draw a Chess Board by using SDL_CreateSoftwareRenderer API */
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
#ifdef __EMSCRIPTEN__
|
|
#include <emscripten/emscripten.h>
|
|
#endif
|
|
|
|
#include "SDL.h"
|
|
|
|
SDL_Window *window;
|
|
SDL_Renderer *renderer;
|
|
SDL_Surface *surface;
|
|
int done;
|
|
|
|
void DrawChessBoard()
|
|
{
|
|
int row = 0, column = 0, x = 0;
|
|
SDL_Rect rect, darea;
|
|
|
|
/* Get the Size of drawing surface */
|
|
SDL_RenderGetViewport(renderer, &darea);
|
|
|
|
for (; row < 8; row++) {
|
|
column = row % 2;
|
|
x = column;
|
|
for (; column < 4 + (row % 2); column++) {
|
|
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0xFF);
|
|
|
|
rect.w = darea.w / 8;
|
|
rect.h = darea.h / 8;
|
|
rect.x = x * rect.w;
|
|
rect.y = row * rect.h;
|
|
x = x + 2;
|
|
SDL_RenderFillRect(renderer, &rect);
|
|
}
|
|
}
|
|
SDL_RenderPresent(renderer);
|
|
}
|
|
|
|
void loop()
|
|
{
|
|
SDL_Event e;
|
|
while (SDL_PollEvent(&e)) {
|
|
|
|
/* Re-create when window has been resized */
|
|
if ((e.type == SDL_WINDOWEVENT) && (e.window.event == SDL_WINDOWEVENT_SIZE_CHANGED)) {
|
|
|
|
SDL_DestroyRenderer(renderer);
|
|
|
|
surface = SDL_GetWindowSurface(window);
|
|
renderer = SDL_CreateSoftwareRenderer(surface);
|
|
/* Clear the rendering surface with the specified color */
|
|
SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xFF, 0xFF);
|
|
SDL_RenderClear(renderer);
|
|
}
|
|
|
|
if (e.type == SDL_QUIT) {
|
|
done = 1;
|
|
#ifdef __EMSCRIPTEN__
|
|
emscripten_cancel_main_loop();
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
if ((e.type == SDL_KEYDOWN) && (e.key.keysym.sym == SDLK_ESCAPE)) {
|
|
done = 1;
|
|
#ifdef __EMSCRIPTEN__
|
|
emscripten_cancel_main_loop();
|
|
#endif
|
|
return;
|
|
}
|
|
}
|
|
|
|
DrawChessBoard();
|
|
|
|
/* Got everything on rendering surface,
|
|
now Update the drawing image on window screen */
|
|
SDL_UpdateWindowSurface(window);
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
/* Enable standard application logging */
|
|
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
|
|
|
|
/* Initialize SDL */
|
|
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init fail : %s\n", SDL_GetError());
|
|
return 1;
|
|
}
|
|
|
|
/* Create window and renderer for given surface */
|
|
window = SDL_CreateWindow("Chess Board", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_RESIZABLE);
|
|
if (!window) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Window creation fail : %s\n", SDL_GetError());
|
|
return 1;
|
|
}
|
|
surface = SDL_GetWindowSurface(window);
|
|
renderer = SDL_CreateSoftwareRenderer(surface);
|
|
if (!renderer) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Render creation for surface fail : %s\n", SDL_GetError());
|
|
return 1;
|
|
}
|
|
|
|
/* Clear the rendering surface with the specified color */
|
|
SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xFF, 0xFF);
|
|
SDL_RenderClear(renderer);
|
|
|
|
/* Draw the Image on rendering surface */
|
|
done = 0;
|
|
#ifdef __EMSCRIPTEN__
|
|
emscripten_set_main_loop(loop, 0, 1);
|
|
#else
|
|
while (!done) {
|
|
loop();
|
|
}
|
|
#endif
|
|
|
|
SDL_Quit();
|
|
return 0;
|
|
}
|
|
|