Implement loading an image when file is dropped

include/drop_area.h

@@ -2,13 +2,17 @@
 #define DROP_AREA_H
 
 #include "colour.h"
+#include "image.h"
 #include "window.h"
 #include <stdbool.h>
 
 typedef struct {
   render_rect_t rect;
+  render_rect_t image_rect;
   colour_t border_colour;
+  image_t image;
   bool mouseover;
+  bool image_loaded;
 } drop_area_t;
 
 void init_drop_area(window_t *wnd, drop_area_t *area, render_rect_t rect,

src/drop_area.c

@@ -1,18 +1,23 @@
 #include "drop_area.h"
 #include "SDL_events.h"
 #include "colour.h"
+#include "image.h"
 #include "window.h"
+#include <stdbool.h>
 #include <stdio.h>
 
 void handle_hover(const window_t *wnd, void *obj, const SDL_Event *ev);
 void handle_drop_file(const window_t *wnd, void *obj, const SDL_Event *ev);
 void render_drop_area(const window_t *wnd, void *obj);
+render_rect_t image_render_rect(drop_area_t *area);
 
 void init_drop_area(window_t *wnd, drop_area_t *area, render_rect_t rect,
                     colour_t border_colour) {
   area->rect = rect;
+  area->image_rect = (render_rect_t){0};
   area->border_colour = border_colour;
   area->mouseover = false;
+  area->image_loaded = false;
 
   add_event_listener(wnd, area, handle_hover);
   add_event_listener(wnd, area, handle_drop_file);
@@ -40,7 +45,14 @@ void handle_drop_file(const window_t *wnd, void *obj, const SDL_Event *ev) {
     return;
   }
 
-  printf("%s\n", ev->drop.file);
+  printf("Loading: %s\n", ev->drop.file);
+
+  area->image_loaded = load_image(wnd, &(area->image), ev->drop.file);
+
+  if (area->image_loaded) {
+    printf("Width: %ld, Height: %ld\n", area->image.width, area->image.height);
+    area->image_rect = image_render_rect(area);
+  }
 }
 
 void render_drop_area(const window_t *wnd, void *obj) {
@@ -50,5 +62,37 @@ void render_drop_area(const window_t *wnd, void *obj) {
 
   drop_area_t *area = (drop_area_t *)obj;
 
+  if (area->image_loaded) {
+    render_texture(wnd, area->image.texture, NULL, &(area->image_rect));
+  }
+
   draw_rect(wnd, &(area->rect), area->border_colour);
 }
+
+render_rect_t image_render_rect(drop_area_t *area) {
+  if (!area || !(area->image_loaded)) {
+    return (render_rect_t){0};
+  }
+
+  u64 w = 0;
+  u64 h = 0;
+
+  if (area->image.width < area->rect.width &&
+      area->image.height < area->rect.height) {
+    w = area->image.width;
+    h = area->image.height;
+  } else {
+    f32 w_factor = (f32)area->rect.width / area->image.width;
+    f32 h_factor = (f32)area->rect.height / area->image.height;
+
+    f32 factor = w_factor < h_factor ? w_factor : h_factor;
+
+    w = area->image.width * factor;
+    h = area->image.height * factor;
+  }
+
+  u64 x = area->rect.x + (area->rect.width - w) / 2;
+  u64 y = area->rect.y + (area->rect.height - h) / 2;
+
+  return (render_rect_t){x, y, w, h};
+}