Adding left, right, up, and down arrow keys

main.cpp

@@ -1,43 +1,71 @@
+#define SDL_MAIN_HANDLED
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
 #include <SDL.h>
 #include <SDL_video.h>
-#include <SDL_image.h>
 #include <time.h>
 
+void draw_line(SDL_Point source, SDL_Point destination, SDL_Renderer * rend)
+{
+
+}
+
+void draw_maze(void)
+{
+
+}
+
 int main( int argc, const char* argv[] )
 {
+    SDL_Renderer *renderer = NULL;
+    SDL_Texture *texture = NULL;
+    SDL_Surface *bitmapSurface = NULL;
     SDL_Window *win;
     SDL_Surface *image;
+    SDL_Rect srcR, destR;
     Uint32 rmask, gmask, bmask, amask;
-    const char name[] = "BLAH";
+    const char name[] = "Game";
     if (SDL_Init(SDL_INIT_EVERYTHING) != 0)
     {
         SDL_Log("Unable to initialize SDL: %s", SDL_GetError());
         return 1;
     }
 
-    win = SDL_CreateWindow(name, 0, 0, 500, 300, SDL_WINDOW_RESIZABLE);
+    win = SDL_CreateWindow(name, 0, 0, 800, 800, SDL_WINDOW_RESIZABLE);
-    if (win == NULL) {
+    if (win == NULL)
+    {
         // In the case that the window could not be made...
         printf("Could not create window: %s\n", SDL_GetError());
         return 1;
     }
+    renderer = SDL_CreateRenderer(win, -1, SDL_RENDERER_ACCELERATED);
+    SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
+    SDL_Rect rectangle;
 
-    image = SDL_GetWindowSurface(win);
+    rectangle.x = 0;
-    printf("Pixel Width: %d, Pixel Heigth: %d\n", image->w, image->h);
+    rectangle.y = 0;
-  //  image = SDL_ConvertSurfaceFormat(image, SDL_PIXELFORMAT_RGB444, 0);
+    rectangle.w = 50;
-    //Update the surface
+    rectangle.h = 50;
-    Uint32 *pixels = (Uint32 *)image->pixels;
+    SDL_RenderFillRect(renderer, &rectangle);
-    SDL_UpdateWindowSurface( win );
+    texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, 800, 800);
-
+    srcR.h = 800;
+    srcR.w = 800;
+    destR.h = 800;
+    destR.w = 800;
+    srcR.x = 0;
+    srcR.y = 0;
+    destR.x = 0;
+    destR.y = 0;
     bool run = true;
-    while (run) {
+    while (run)
+    {
         clock_t start_t, end_t;
         SDL_Event event;
-        while (SDL_PollEvent(&event)) {
+        bool redraw = false;
+        while (SDL_PollEvent(&event))
+        {
             /* handle your event here */
             if (event.type == SDL_MOUSEBUTTONDOWN)
             {
@@ -47,28 +75,90 @@ int main( int argc, const char* argv[] )
                 }
                 else if (event.button.button == SDL_BUTTON_LEFT) // scroll up
                 {
-                    //Update the surface
+                    rectangle.x += 50;
-                    SDL_LockSurface(image);
+                    rectangle.y += 0;
-                    for (size_t i = 0; i < (500*300); i++) {
+                    redraw = true;
-                      pixels[i] += 0xFF;
                 }
-                    SDL_UnlockSurface(image);
-                    start_t = clock();
-                    SDL_UpdateWindowSurface(win);
-                    end_t = clock();
-                    printf("Time to draw a frame %f \n", ((double)(end_t - start_t)/(double)(CLOCKS_PER_SEC)));
             }
+            else if (event.type == SDL_KEYDOWN)
+            {
+                if (event.key.keysym.sym == SDLK_UP)
+                {
+                    rectangle.y -= 50;
+                }
+                else if (event.key.keysym.sym == SDLK_DOWN)
+                {
+                    rectangle.y += 50;
+                }
+                else if (event.key.keysym.sym == SDLK_RIGHT)
+                {
+                    rectangle.x += 50;
+                }
+                else if (event.key.keysym.sym == SDLK_LEFT)
+                {
+                    rectangle.x -= 50;
+                }
+                else
+                {
+                    /* Do nothing. */
+                }
+                redraw = true;
             }
             else if (event.type == SDL_QUIT)
             {
                 run = false;
             }
-
+            else if (event.type == SDL_WINDOWEVENT)
+            {
+                switch (event.window.event)
+                {
+                case SDL_WINDOWEVENT_ENTER:
+                case SDL_WINDOWEVENT_SHOWN:
+                case SDL_WINDOWEVENT_MOVED:
+                case SDL_WINDOWEVENT_EXPOSED:
+                case SDL_WINDOWEVENT_RESTORED:
+                    redraw = true;
+                    break;
+                case SDL_WINDOWEVENT_RESIZED:
+                case SDL_WINDOWEVENT_SIZE_CHANGED:
+                case SDL_WINDOWEVENT_MAXIMIZED:
+                    redraw = true;
+                    SDL_GetWindowSize(win, &destR.w, &destR.h);
+                    SDL_Texture *texture_temp = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, destR.w, destR.h);
+                    srcR.h = destR.h;
+                    srcR.w = destR.w;
+                    SDL_RenderCopy(renderer, texture_temp, &srcR, &destR);
+                    SDL_DestroyTexture(texture);
+                    texture = texture_temp;
+                    break;
+                }
+            }
+            else
+            {
+                /* Do nothing. */
+            }
+        }
+        if (redraw)
+        {
+            SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 0x00);
+            SDL_RenderClear(renderer);
+            SDL_SetRenderTarget(renderer, texture);
+            SDL_RenderDrawRect(renderer, &rectangle);
+            SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xFF, 0x00);
+            SDL_RenderFillRect(renderer, &rectangle);
+            SDL_SetRenderTarget(renderer, NULL);
+            SDL_RenderCopy(renderer, texture, &srcR, &destR);
+            SDL_RenderPresent(renderer);
         }
         /* do some other stuff here -- draw your app, etc. */
     }
     SDL_FreeSurface(image);
+    SDL_DestroyTexture(texture);
+    SDL_DestroyRenderer(renderer);
     SDL_DestroyWindow(win);
     return 0;
 }
 //g++ main.cpp -o blah `sdl2-config --cflags --libs`
+/*
+g++ main.cpp -IC:\Users\Daniel\Documents\Projects\i686-w64-mingw32\include\SDL2 -LC:\Users\Daniel\Documents\Projects\i686-w64-mingw32\lib -w -Wl,-subsystem,windows -lmingw32 -lSDL2main -lSDL2 -o SDLMain 
+*/