| /* |
| 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 <SDL3/SDL.h> |
| #include <SDL3/SDL_main.h> |
| #include <SDL3/SDL_test.h> |
| |
| #ifdef SDL_PLATFORM_EMSCRIPTEN |
| #include <emscripten/emscripten.h> |
| #endif |
| |
| static SDL_Window *window; |
| static SDL_Renderer *renderer; |
| static SDL_Surface *surface; |
| static int done; |
| |
| |
| static void DrawChessBoard(void) |
| { |
| int row = 0, column = 0, x = 0; |
| SDL_FRect rect; |
| SDL_Rect darea; |
| |
| /* Get the Size of drawing surface */ |
| SDL_GetRenderViewport(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 = (float)(darea.w / 8); |
| rect.h = (float)(darea.h / 8); |
| rect.x = (float)(x * rect.w); |
| rect.y = (float)(row * rect.h); |
| x = x + 2; |
| SDL_RenderFillRect(renderer, &rect); |
| |
| /* Draw a red diagonal line through the upper left rectangle */ |
| if (column == 0 && row == 0) { |
| SDL_SetRenderDrawColor(renderer, 0xFF, 0, 0, 0xFF); |
| SDL_RenderLine(renderer, 0, 0, rect.w, rect.h); |
| } |
| } |
| } |
| SDL_RenderPresent(renderer); |
| } |
| |
| static void loop(void) |
| { |
| SDL_Event e; |
| while (SDL_PollEvent(&e)) { |
| |
| /* Re-create when window surface has been resized */ |
| if (e.type == SDL_EVENT_WINDOW_PIXEL_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_EVENT_QUIT) { |
| done = 1; |
| #ifdef SDL_PLATFORM_EMSCRIPTEN |
| emscripten_cancel_main_loop(); |
| #endif |
| return; |
| } |
| |
| if ((e.type == SDL_EVENT_KEY_DOWN) && (e.key.keysym.sym == SDLK_ESCAPE)) { |
| done = 1; |
| #ifdef SDL_PLATFORM_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[]) |
| { |
| SDLTest_CommonState *state; |
| |
| /* Initialize test framework */ |
| state = SDLTest_CommonCreateState(argv, 0); |
| if (!state) { |
| return 1; |
| } |
| |
| /* Enable standard application logging */ |
| SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO); |
| |
| /* Parse commandline */ |
| if (!SDLTest_CommonDefaultArgs(state, argc, argv)) { |
| return 1; |
| } |
| |
| /* 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", 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 SDL_PLATFORM_EMSCRIPTEN |
| emscripten_set_main_loop(loop, 0, 1); |
| #else |
| while (!done) { |
| loop(); |
| } |
| #endif |
| |
| SDL_DestroyRenderer(renderer); |
| SDL_DestroyWindow(window); |
| |
| SDL_Quit(); |
| SDLTest_CommonDestroyState(state); |
| return 0; |
| } |