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

1 files changed, 139 insertions, 1 deletions

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);
 }