initial commit

main.cpp

@@ -0,0 +1,74 @@
+#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>
+
+int main( int argc, const char* argv[] )
+{
+    SDL_Window * win;
+    SDL_Surface *image;
+    Uint32 rmask, gmask, bmask, amask;
+    const char name[] = "BLAH";
+    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);
+    if (win == NULL) {
+        // In the case that the window could not be made...
+        printf("Could not create window: %s\n", SDL_GetError());
+        return 1;
+    }
+
+    image = SDL_GetWindowSurface(win);
+    printf("Pixel Width: %d, Pixel Heigth: %d\n", image->w, image->h);
+  //  image = SDL_ConvertSurfaceFormat(image, SDL_PIXELFORMAT_RGB444, 0);
+    //Update the surface
+    Uint32 *pixels = (Uint32 *)image->pixels;
+    SDL_UpdateWindowSurface( win );
+
+    bool run = true;
+    while (run) {
+        clock_t start_t, end_t;
+        SDL_Event event;
+        while (SDL_PollEvent(&event)) {
+            /* handle your event here */
+            if(event.type == SDL_MOUSEBUTTONDOWN)
+            {
+                if(event.button.button == SDL_BUTTON_MIDDLE) // scroll up
+                {
+                    run = false;
+                }
+                else if(event.button.button == SDL_BUTTON_LEFT) // scroll up
+                {
+                    //Update the surface
+                    SDL_LockSurface(image);
+                    for (size_t i = 0; i < (500*300); i++) {
+                      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_QUIT)
+            {
+                run = false;
+            }
+
+        }
+        /* do some other stuff here -- draw your app, etc. */
+    }
+    SDL_FreeSurface(image);
+    SDL_DestroyWindow(win);
+    return 0;
+}
+//g++ main.cpp -o blah `sdl2-config --cflags --libs`