148 lines
3.6 KiB
C
148 lines
3.6 KiB
C
#include "SDL2/SDL.h"
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//Write a function that moves an image based on which arrow keys are pressed.
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//something like
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//void move_image(direction, image);
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int main ( int argc, char *argv[] )
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{
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/* initialize SDL */
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if (SDL_Init(SDL_INIT_EVERYTHING) != 0){
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printf("Unable to init SDL!: %s\n", SDL_GetError());
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return 1;
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}
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/* init surfaces */
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SDL_Window* screen; //No longer need to do this part I suppose
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SDL_Renderer* renderer;
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SDL_Surface* temp;
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SDL_Texture* top_image;
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const char background_imagefile[] = "sdl_logo.bmp";
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SDL_Surface* background_surface;
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SDL_Texture* background_texture;
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SDL_Rect top_image_dest = { 0 };
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SDL_Event event = { 0 };
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int screen_width = 1024, screen_height = 768;
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int top_image_width = 0, top_image_height = 0;
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/* create window of size 640x480 and set title bar*/
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screen = SDL_CreateWindow("SDL TEST",
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SDL_WINDOWPOS_CENTERED,
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SDL_WINDOWPOS_CENTERED,
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screen_width, screen_height,
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0);
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if (screen == NULL){
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printf("Unable to set video mode: %s\n", SDL_GetError());
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return 1;
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}
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renderer = SDL_CreateRenderer(screen, -1, 0);
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if (renderer == NULL){
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printf("Unable to create renderer: %s\n", SDL_GetError());
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}
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atexit(SDL_Quit);
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/* load bitmap to surface */
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background_surface = SDL_LoadBMP(background_imagefile);
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if (background_surface == NULL){
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printf("Unable to find image!!: %s\n", SDL_GetError());
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return 1;
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}
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else{
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/* convert bitmap to texture */
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background_texture = SDL_CreateTextureFromSurface(renderer, background_surface);
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SDL_FreeSurface(background_surface); // No longer need the surface
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background_surface = NULL;
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if(background_texture == NULL) {
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printf("Failed to create texture from background surface: %s\n", SDL_GetError());
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return 1;
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}
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}
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/* load top_image image to practice blit on top of surface*/
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temp = SDL_LoadBMP("dinowheel.bmp");
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if (temp == NULL){
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printf("Unable to load top_image: %s/n", SDL_GetError());
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return 1;
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}
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else{
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top_image = SDL_CreateTextureFromSurface(renderer, temp);
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SDL_FreeSurface(temp);
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temp = NULL;
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/* Get height and width of top_image */
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SDL_QueryTexture(top_image, NULL, NULL, &top_image_width, &top_image_height);
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if(top_image == NULL) {
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printf("Failed to create texture from top_image: %s\n", SDL_GetError());
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return 1;
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}
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}
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int gameover = 0;
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/* message pump */
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while (!gameover)
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{
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/* look for an event */
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if (SDL_PollEvent(&event)) {
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/* an event was found */
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switch (event.type) {
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/* close button clicked */
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case SDL_QUIT:
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gameover = 1;
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break;
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/* handle the keyboard */
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case SDL_KEYDOWN:
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switch (event.key.keysym.sym) {
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case SDLK_ESCAPE:
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case SDLK_q:
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gameover = 1;
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break;
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case SDLK_w:
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printf("You just pressed 'w'\n");
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break;
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}
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break;
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}
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}
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/* render the background */
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SDL_RenderCopy(renderer, background_texture, NULL, NULL);
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/* Render entire top_image to center of screen */
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top_image_dest.x = (screen_width / 2) - (top_image_width / 2);
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top_image_dest.y = (screen_width / 2) - (top_image_height / 2);
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top_image_dest.w = top_image_width;
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top_image_dest.h = top_image_height;
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SDL_RenderCopy(renderer, top_image, NULL, &top_image_dest);
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/* Render here */
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SDL_RenderPresent(renderer);
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}
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/* cleanup SDL */
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if (renderer) SDL_DestroyRenderer(renderer);
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if (screen) SDL_DestroyWindow(screen);
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if (background_texture) SDL_DestroyTexture(background_texture);
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if (top_image) SDL_DestroyTexture(top_image);
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SDL_Quit();
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return 0;
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}
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