add moves and header text, won bg animation, window title

4 files changed, 197 insertions, 22 deletions

diff --git a/src/sdl/color.c b/src/sdl/color.c
index cb94095..16c7cfd 100644
--- a/src/sdl/color.c
+++ b/src/sdl/color.c
@@ -5,7 +5,7 @@
 static const SDL_Color
 PALETTE[] = {
   { .r = 0x00, .g = 0x00, .b = 0x00, .a = 0xFF }, // COLOR_BG
-  { .r = 0x00, .g = 0xFF, .b = 0x00, .a = 0xFF }, // COLOR_BG_WON
+  { .r = 0x00, .g = 0x66, .b = 0x00, .a = 0xFF }, // COLOR_BG_WON
   { .r = 0x66, .g = 0x66, .b = 0x66, .a = 0xFF }, // COLOR_WALL
   { .r = 0x00, .g = 0xFF, .b = 0x00, .a = 0xFF }, // COLOR_GOAL
   { .r = 0xFF, .g = 0x00, .b = 0x00, .a = 0xFF }, // COLOR_HOME
diff --git a/src/sdl/draw.c b/src/sdl/draw.c
index 4449b52..aa16bca 100644
--- a/src/sdl/draw.c
+++ b/src/sdl/draw.c
@@ -1,4 +1,5 @@
 #include <stdbool.h> // bool
+#include <math.h> // sinf()
 #include "util.h" // warn()/die()
 #include "color.h" // set_color()
 #include "draw.h"
@@ -251,17 +252,154 @@ DRAW_CBS = {
 };
 #endif /* DRAW_SPRITES */
 
+static const SDL_Color
+TEXT_COLORS[] = {
+  { 0xff, 0xff, 0xff, 0xff }, // fg
+  { 0x00, 0x00, 0x00, 0xff }, // bg
+};
+
+static void
+draw_text(
+  draw_ctx_t * const draw_ctx,
+  const char * const buf,
+  const SDL_Rect * const rect
+) {
+  // create surface
+  SDL_Surface *surface = TTF_RenderText_Shaded(
+    draw_ctx->font,
+    buf,
+    TEXT_COLORS[0],
+    TEXT_COLORS[1]
+  );
+
+  // check for error
+  if (!surface) {
+    die("TTF_RenderText_Blended(): %s", TTF_GetError());
+  }
+
+  // create texture
+  SDL_Texture *texture = SDL_CreateTextureFromSurface(draw_ctx->renderer, surface);
+  if (!texture) {
+    die("SDL_CreateTextureFromSurface(): %s", SDL_GetError());
+  }
+
+  // free surface
+  SDL_FreeSurface(surface);
+
+  // render text
+  if (SDL_RenderCopy(draw_ctx->renderer, texture, NULL, rect)) {
+    die("SDL_RenderCopy(): %s", SDL_GetError());
+  }
+
+  // free texture
+  SDL_DestroyTexture(texture);
+}
+
+static void
+draw_level_text(
+  draw_ctx_t * const draw_ctx
+) {
+  // build text
+  char buf[256];
+  snprintf(
+    buf, sizeof(buf),
+    "%s: %s (#%zu)",
+    draw_ctx->level->pack,
+    draw_ctx->level->name,
+    *draw_ctx->level_num
+  );
+
+  // get renderer width
+  int renderer_w;
+  if (SDL_GetRendererOutputSize(draw_ctx->renderer, &renderer_w, NULL)) {
+    die("SDL_GetRendererOutputSize(): %s", SDL_GetError());
+  }
+
+  // get text size
+  int text_w, text_h;
+  if (TTF_SizeText(draw_ctx->font, buf, &text_w, &text_h)) {
+    die("TTF_SizeText(): %s", TTF_GetError());
+  }
+
+  // build rect
+  const SDL_Rect rect = { (renderer_w - text_w) / 2, 10, text_w, text_h };
+
+  // draw text
+  draw_text(draw_ctx, buf, &rect);
+}
+
+static void
+draw_moves_text(
+  draw_ctx_t * const draw_ctx
+) {
+  // build text
+  char buf[256];
+  snprintf(buf, sizeof(buf), "Moves: %zu", draw_ctx->ctx->num_moves);
+
+  // get renderer height
+  int renderer_h;
+  if (SDL_GetRendererOutputSize(draw_ctx->renderer, NULL, &renderer_h)) {
+    die("SDL_GetRendererOutputSize(): %s", SDL_GetError());
+  }
+
+  // get text size
+  int text_w, text_h;
+  if (TTF_SizeText(draw_ctx->font, buf, &text_w, &text_h)) {
+    die("TTF_SizeText(): %s", TTF_GetError());
+  }
+
+  // build rect
+  const SDL_Rect rect = { 10, renderer_h - text_h - 10, text_w, text_h };
+
+  // draw text
+  draw_text(draw_ctx, buf, &rect);
+}
+
+static void
+set_bg_won_color(
+  draw_ctx_t * const draw_ctx
+) {
+  const Uint32 ticks = SDL_GetTicks();
+
+  // gen color
+  const SDL_Color c = {
+    .r = 0x66 + 0x33 * sinf((1000 + ticks) * 2.0 * 3.14159 / 2000.0),
+    .g = 0x66 + 0x33 * sinf((3000 + ticks) * 2.0 * 3.14159 / 5000.0),
+    .b = 0x66 + 0x33 * sinf((5000 + ticks) * 2.0 * 3.14159 / 7000.0),
+    .a = 0xFF,
+  };
+
+  // set color
+  if (SDL_SetRenderDrawColor(draw_ctx->renderer, c.r, c.g, c.b, c.a)) {
+    die("SDL_SetRenderDrawColor(): %s", SDL_GetError());
+  }
+}
+
 void
 draw(
   draw_ctx_t * const draw_ctx
 ) {
+  const bool is_done = sok_ctx_is_done(draw_ctx->ctx);
+
+  // set bg color
+  if (sok_ctx_is_done(draw_ctx->ctx)) {
+    // set bg won color
+    set_bg_won_color(draw_ctx);
+  } else {
+    // set normal bg color
+    set_color(draw_ctx->renderer, is_done ? COLOR_BG_WON : COLOR_BG);
+  }
+
   // clear background
-  set_color(draw_ctx->renderer, sok_ctx_is_done(draw_ctx->ctx) ? COLOR_BG_WON : COLOR_BG);
   SDL_RenderClear(draw_ctx->renderer);
 
   // render
   sok_ctx_walk(draw_ctx->ctx, &DRAW_CBS, draw_ctx);
 
+  // render text
+  draw_level_text(draw_ctx);
+  draw_moves_text(draw_ctx);
+
     // flip
   SDL_RenderPresent(draw_ctx->renderer);
 }
diff --git a/src/sdl/draw.h b/src/sdl/draw.h
index 873287a..b8aeed4 100644
--- a/src/sdl/draw.h
+++ b/src/sdl/draw.h
@@ -3,6 +3,7 @@
 
 #include <stddef.h> // size_t
 #include <SDL.h>
+#include <SDL_ttf.h>
 #include "../libsok/sok.h" 
 #include "../text/levels.h"
 
@@ -12,6 +13,7 @@
 typedef struct {
   SDL_Renderer * const renderer;
   SDL_Texture *sprites[MAX_SPRITES];
+  TTF_Font *font;
 
   const sok_ctx_t * const ctx;
   const size_t * const level_num;
diff --git a/src/sdl/main.c b/src/sdl/main.c
index 9341f4a..5eca49c 100644
--- a/src/sdl/main.c
+++ b/src/sdl/main.c
@@ -94,11 +94,40 @@ solve_on_error(
   die("Error solving level: %s", err);
 }
 
+static void
+set_level(
+  SDL_Window * const win,
+  draw_ctx_t * const draw_ctx,
+  sok_ctx_t * const ctx,
+  const size_t level_num
+) {
+  // get level data
+  draw_ctx->level = levels_get_level(level_num);
+
+  // load level
+  if (!sok_ctx_set_level(ctx, draw_ctx->level->data)) {
+    die("Couldn't load level %zu", level_num);
+  }
+
+  // build title
+  char buf[1024];
+  snprintf(
+    buf, sizeof(buf),
+    "Sokoban: %s: %s (#%zu)",
+    draw_ctx->level->pack,
+    draw_ctx->level->name,
+    level_num
+  );
+
+  // set window title
+  SDL_SetWindowTitle(win, buf);
+}
+
 int main(int argc, char *argv[]) {
   size_t level_num = (argc > 1) ? atoi(argv[1]) : 0,
          zoom = 0;
-  const level_t *level = levels_get_level(level_num);
   const char *sprites_png_path = "../assets/sprites.png";
+  const char *font_path = "../assets/roboto.ttf";
 
   // init warp buffer
   warp_buf_t warp_buf;
@@ -108,10 +137,6 @@ int main(int argc, char *argv[]) {
   sok_ctx_t ctx;
   sok_ctx_init(&ctx, NULL);
 
-  if (!sok_ctx_set_level(&ctx, level->data)) {
-    die("Couldn't load level %zu", level_num);
-  }
-
   // init sdl
   if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO)) {
     die("SDL_Init(): %s", SDL_GetError());
@@ -119,7 +144,18 @@ int main(int argc, char *argv[]) {
 
   // register exit handler
   if (atexit(SDL_Quit)) {
-    die("atexit(): %s", strerror(errno));
+    die("atexit(SDL_Init): %s", strerror(errno));
+    exit(EXIT_FAILURE);
+  }
+
+  // init SDL_TTF
+  if (TTF_Init()) {
+    die("TTF_Init(): %s", TTF_GetError());
+  }
+
+  // register exit handler
+  if (atexit(TTF_Quit)) {
+    die("atexit(TTF_Quit): %s", strerror(errno));
     exit(EXIT_FAILURE);
   }
 
@@ -135,15 +171,23 @@ int main(int argc, char *argv[]) {
   // init draw context
   draw_ctx_t draw_ctx = {
     .level_num  = &level_num,
-    .level      = level,
     .ctx        = &ctx,
     .renderer   = renderer,
     .zoom       = &zoom,
   };
 
+  // set level
+  set_level(win, &draw_ctx, &ctx, level_num);
+
   // init sprites
   sprites_init(renderer, sprites_png_path, draw_ctx.sprites);
 
+  // load font
+  draw_ctx.font = TTF_OpenFontIndex(font_path, 16, 0);
+  if (!draw_ctx.font) {
+    die("TTF_OpenFontIndex(): %s", TTF_GetError());
+  }
+
   bool done = false;
   SDL_Event ev;
   while (!done) {
@@ -176,13 +220,9 @@ int main(int argc, char *argv[]) {
         if (sok_ctx_is_done(&ctx)) {
           // advance level
           level_num++;
-          level = levels_get_level(level_num);
-          draw_ctx.level = level;
 
-          // load next level
-          if (!sok_ctx_set_level(&ctx, level->data)) {
-            die("Couldn't load level %zu", level_num);
-          }
+          // set level
+          set_level(win, &draw_ctx, &ctx, level_num);
         } else {
           warn("cannot advance to next level");
         }
@@ -190,20 +230,15 @@ int main(int argc, char *argv[]) {
         break;
       case ACTION_RESET:
         // reset level
-        if (!sok_ctx_set_level(&ctx, level->data)) {
+        if (!sok_ctx_set_level(&ctx, draw_ctx.level->data)) {
           die("Couldn't load level %zu", level_num);
         }
 
         break;
       case ACTION_WARP:
         if (warp_buf_get(&warp_buf, &level_num)) {
-          level = levels_get_level(level_num);
-          draw_ctx.level = level;
-
           // load level
-          if (!sok_ctx_set_level(&ctx, level->data)) {
-            die("Couldn't load level %zu", level_num);
-          }
+          set_level(win, &draw_ctx, &ctx, level_num);
 
           // clear warp buf
           warp_buf_clear(&warp_buf);