Add image loading stub

2 files changed, 46 insertions, 1 deletions

diff --git a/loader.c b/loader.c
new file mode 100644
index 0000000..0a94cf9
--- /dev/null
+++ b/loader.c
@@ -0,0 +1,29 @@
+#include <SDL2/SDL.h>
+#include <string.h>
+
+SDL_Texture* imv_load_image(SDL_Renderer *r, const char* path)
+{
+  if(!path)
+    return NULL;
+
+  const char* ext = strrchr(path, '.');
+  SDL_Texture *img = NULL;
+  if(ext == NULL) {
+    fprintf(stderr,
+        "Could not determine filetype of '%s' from its extension.\n",
+        path);
+  } else if(strcasecmp(ext, ".test") == 0) {
+    const int width = 1280;
+    const int height = 720;
+    img = SDL_CreateTexture(r,
+        SDL_PIXELFORMAT_RGB888, SDL_TEXTUREACCESS_STATIC,
+        width, height);
+    void *pixels = malloc(width*height*3);
+    memset(pixels, 255, width*height*3);
+    SDL_Rect area = {0,0,width,height};
+    SDL_UpdateTexture(img, &area, pixels, width * 3);
+    free(pixels);
+  }
+
+  return img;
+}
diff --git a/main.c b/main.c
index 55dce77..b4fae06 100644
--- a/main.c
+++ b/main.c
@@ -1,6 +1,8 @@
 #include <stdio.h>
 #include <SDL2/SDL.h>
 
+SDL_Texture* imv_load_image(SDL_Renderer *r, const char* path);
+
 int main(int argc, char** argv)
 {
   if(argc < 2) {
@@ -30,6 +32,7 @@ int main(int argc, char** argv)
   const int num_paths = argc - 1;
   int cur_path = -1;
   int next_path = 0;
+  SDL_Texture *img = NULL;
 
   int quit = 0;
   int redraw = 1;
@@ -69,12 +72,21 @@ int main(int argc, char** argv)
     if(next_path != cur_path) {
       cur_path = next_path;
       fprintf(stdout, "current image: %s\n", paths[cur_path]);
+      if(img) {
+        SDL_DestroyTexture(img);
+        img = NULL;
+      }
+      img = imv_load_image(renderer, paths[cur_path]);
       redraw = 1;
     }
 
     if(redraw) {
       SDL_RenderClear(renderer);
-      //SDL_RenderCopy(renderer, tex, srcrect, dstrect);
+
+      if(img) {
+        SDL_Rect area = {0,0,width,height};
+        SDL_RenderCopy(renderer, img, &area, &area);
+      }
 
       SDL_RenderPresent(renderer);
       redraw = 0;
@@ -82,6 +94,10 @@ int main(int argc, char** argv)
     SDL_Delay(10);
   }
 
+  if(img) {
+    SDL_DestroyTexture(img);
+    img = NULL;
+  }
   SDL_DestroyRenderer(renderer);
   SDL_DestroyWindow(window);
   SDL_Quit();