From 92b5be79743457d6746e6d00ad4edbfdd955d828 Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Sat, 19 Jan 2019 11:05:06 -0500
Subject: update fade texture on window resize

---
 src/sdl/action.c |  8 +++++++
 src/sdl/action.h |  1 +
 src/sdl/draw.c   |  6 +++++-
 src/sdl/main.c   | 65 ++++++++++++++++++++++++++++++++++++++++----------------
 4 files changed, 61 insertions(+), 19 deletions(-)

diff --git a/src/sdl/action.c b/src/sdl/action.c
index bc0cf89..fa032d6 100644
--- a/src/sdl/action.c
+++ b/src/sdl/action.c
@@ -105,6 +105,14 @@ get_action(
   case SDL_QUIT:
     return (action_t) { .type = ACTION_QUIT };
     break;
+  case SDL_WINDOWEVENT:
+    switch (ev->window.event) {
+    case SDL_WINDOWEVENT_SIZE_CHANGED:
+    case SDL_WINDOWEVENT_RESIZED:
+      return (action_t) { .type = ACTION_RESIZE };
+      break;
+    }
+    break;
   case SDL_MOUSEWHEEL:
     return get_wheel_action(ev->wheel.y);
     break;
diff --git a/src/sdl/action.h b/src/sdl/action.h
index afe6fd3..6e199bc 100644
--- a/src/sdl/action.h
+++ b/src/sdl/action.h
@@ -23,6 +23,7 @@ typedef enum {
   ACTION_SOLVE_EVENT_DONE,
   ACTION_RESET,
   ACTION_FULLSCREEN,
+  ACTION_RESIZE,
   ACTION_LAST,
 } action_type_t;
 
diff --git a/src/sdl/draw.c b/src/sdl/draw.c
index e980131..4209016 100644
--- a/src/sdl/draw.c
+++ b/src/sdl/draw.c
@@ -292,7 +292,11 @@ draw_solve_moves_text(
   char buf[1024];
 
   // fill buffer
-  snprintf(buf, sizeof(buf), " %u attempts ", (unsigned int) draw_ctx->solve_num_steps);
+  snprintf(
+    buf, sizeof(buf),
+    " Moves Tried: %u ",
+    (unsigned int) draw_ctx->solve_num_steps
+  );
 
   // draw text
   draw_text(draw_ctx->renderer, draw_ctx->font, style, buf);
diff --git a/src/sdl/main.c b/src/sdl/main.c
index 0d492a5..53f2377 100644
--- a/src/sdl/main.c
+++ b/src/sdl/main.c
@@ -46,6 +46,42 @@ load_font(
   return font;
 }
 
+static void
+on_resize(
+  draw_ctx_t * const draw_ctx
+) {
+  if (draw_ctx->fade_tex) {
+    // free existing fade texture
+    SDL_DestroyTexture(draw_ctx->fade_tex);
+    draw_ctx->fade_tex = NULL;
+  }
+
+  // get window size
+  int w, h;
+  if (SDL_GetRendererOutputSize(draw_ctx->renderer, &w, &h)) {
+    die("SDL_GetRendererOutputSize(): %s", SDL_GetError());
+  }
+
+  // create fade texture
+  draw_ctx->fade_tex = SDL_CreateTexture(
+    draw_ctx->renderer,
+    SDL_PIXELFORMAT_RGBA32,
+    SDL_TEXTUREACCESS_TARGET,
+    w,
+    h
+  );
+
+  // check for error
+  if (!draw_ctx->fade_tex) {
+    die("SDL_CreateTexture(): %s", SDL_GetError());
+  }
+
+  // set fade texture blend mode
+  if (SDL_SetTextureBlendMode(draw_ctx->fade_tex, SDL_BLENDMODE_BLEND)) {
+    die("SDl_SetTextureBlendMode(): %s", SDL_GetError());
+  }
+}
+
 static void
 draw_to_fade_tex(
   draw_ctx_t * const draw_ctx
@@ -229,26 +265,11 @@ int main(int argc, char *argv[]) {
     .theme      = theme_get_default(),
     .bump_ticks = SDL_GetTicks() - 5000,
     .fade_ticks = SDL_GetTicks() - 5000,
+    .fade_tex   = NULL,
   };
 
-  // create fade texture
-  draw_ctx.fade_tex = SDL_CreateTexture(
-    renderer,
-    SDL_PIXELFORMAT_RGBA32,
-    SDL_TEXTUREACCESS_TARGET,
-    WINDOW_WIDTH,
-    WINDOW_HEIGHT
-  );
-
-  // set fade texture blend mode
-  if (SDL_SetTextureBlendMode(draw_ctx.fade_tex, SDL_BLENDMODE_BLEND)) {
-    die("SDl_SetTextureBlendMode(): %s", SDL_GetError());
-  }
-
-  // check for error
-  if (!draw_ctx.fade_tex) {
-    die("SDL_CreateTexture(): %s", SDL_GetError());
-  }
+  // force resize (init fade texture)
+  on_resize(&draw_ctx);
 
   // set level
   set_level(&draw_ctx, &ctx, level_num);
@@ -379,6 +400,14 @@ int main(int argc, char *argv[]) {
         // toggle flag
         is_fullscreen = !is_fullscreen;
 
+        // handle resize
+        on_resize(&draw_ctx);
+
+        break;
+      case ACTION_RESIZE:
+        // handle resize
+        on_resize(&draw_ctx);
+
         break;
       case ACTION_SOLVE_CANCEL:
         SDL_Log("solve cancelled by user");
-- 
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