step 2: banner_scene substituix doBanner() (piràmides 2-5) + helper playMusic compartit

source/scenes/banner_scene.cpp

@@ -0,0 +1,71 @@
+#include "scenes/banner_scene.hpp"
+
+#include <cstdlib>
+
+#include "core/jail/jail_audio.hpp"
+#include "core/jail/jdraw8.hpp"
+#include "core/jail/jinput.hpp"
+#include "game/info.hpp"
+#include "scenes/scene_utils.hpp"
+
+namespace scenes {
+
+void BannerScene::onEnter() {
+    playMusic("00000004.ogg");
+
+    gfx_ = SurfaceHandle("ffase.gif");
+
+    JD8_ClearScreen(0);
+    // Títols superior i inferior del banner (compartits per tots els nivells)
+    JD8_Blit(81, 24, gfx_, 81, 155, 168, 21);
+    JD8_Blit(39, 150, gfx_, 39, 175, 248, 20);
+
+    // Número de piràmide: les 4 variants del vell `doBanner` es reduïxen
+    // a coordenades (sx,sy) calculades a partir de l'índex 0..3.
+    const int idx = info::ctx.num_piramide - 2;  // 2..5 → 0..3
+    if (idx >= 0 && idx <= 3) {
+        const int sx = (idx % 2) * 160;
+        const int sy = (idx / 2) * 75;
+        JD8_Blit(82, 60, gfx_, sx, sy, 160, 75);
+    }
+
+    // PaletteFade copia internament amb memcpy; alliberem la paleta temporal.
+    JD8_Palette pal = JD8_LoadPalette("ffase.gif");
+    fade_.startFadeTo(pal);
+    std::free(pal);
+
+    phase_ = Phase::FadingIn;
+    remaining_ms_ = 5000;
+}
+
+void BannerScene::tick(int delta_ms) {
+    switch (phase_) {
+        case Phase::FadingIn:
+            fade_.tick(delta_ms);
+            if (fade_.done()) phase_ = Phase::Showing;
+            break;
+
+        case Phase::Showing:
+            if (JI_AnyKey()) {
+                remaining_ms_ = 0;
+            } else {
+                remaining_ms_ -= delta_ms;
+            }
+            if (remaining_ms_ <= 0) {
+                JA_FadeOutMusic(250);
+                fade_.startFadeOut();
+                phase_ = Phase::FadingOut;
+            }
+            break;
+
+        case Phase::FadingOut:
+            fade_.tick(delta_ms);
+            if (fade_.done()) phase_ = Phase::Done;
+            break;
+
+        case Phase::Done:
+            break;
+    }
+}
+
+}  // namespace scenes