X-Git-Url: https://git.ctpug.org.za/?a=blobdiff_plain;f=koperkapel%2Fscenes%2Flevel.py;h=37f554012e7500db17585a88a0c27f6d13beac70;hb=192d7bf00ebe46c3984c70634ca90370ee0cbc09;hp=c29ffc0c94de4f6343c083af9c3511afc10b69d5;hpb=590f15d78138250a04cc777d645c2ca632b8984a;p=koperkapel.git

diff --git a/koperkapel/scenes/level.py b/koperkapel/scenes/level.py
index c29ffc0..37f5540 100644
--- a/koperkapel/scenes/level.py
+++ b/koperkapel/scenes/level.py
@@ -1,21 +1,59 @@
 """Render a level"""
 
-import json
-
 from pgzero.constants import keys
+from pygame import Surface
+import pygame.locals as pgl
+from ..loaders.levelloader import levels
 from .base import Scene, ChangeSceneEvent
+from ..constants import TILE_SIZE
 
 
 class LevelScene(Scene):
     """ Level scene. """
 
-
-    def __init__(self, level_name):
-        self._level_name = level_name
-
-    def draw(self, screen):
+    def enter(self, world):
+        self._level_data = levels.load(world.level.name)
+        self._tiles = self._level_data['tiles']
+        self._level_layer = 'floor'
+        self._surfaces = {}
+        self._overlay = {}
+        for layer in ['floor', 'tunnels']:
+            self._surfaces[layer] = self._render(layer)
+        self._overlay = self._surfaces['floor'].copy()
+
+    def _render(self, layer):
+        # We cache the rendered surface to avoid doing a large number
+        # of blits each frame, as that introduces a large performance
+        # overhead.
+        surface = Surface((len(self._tiles[0]) * TILE_SIZE,
+                           len(self._tiles) * TILE_SIZE))
+        layer_key = '%s image' % layer
+        for y, row in enumerate(self._tiles):
+            for x, tile in enumerate(row):
+                pos = (x * TILE_SIZE, y * TILE_SIZE)
+                if layer_key not in tile:
+                    # Skip broken tiles for now
+                    continue
+                surface.blit(tile[layer_key], pos)
+        return surface.convert_alpha()
+
+    def draw(self, screen, viewport):
         screen.clear()
-        screen.draw.text("This is level {}".format(self._level_name), (200, 100))
+        # Viewport is the position of the screen relative to the
+        # surface. We need the position of the surface relative to
+        # the screen for the blit, so this conversion
+        screen_pos = -viewport[0], -viewport[1]
+        if self._level_layer == 'floor':
+            screen.blit(self._surfaces[self._level_layer], screen_pos)
+        else:
+            # blit tunnels, with translucent overlay
+            # We need to call pygame.Surface.blit ourselves,
+            # since pgzero's screen blit hides the blend flags
+            # from us
+            tunnels = self._surfaces[self._level_layer].copy()
+            tunnels.blit(self._overlay, (0, 0),
+                         special_flags=pgl.BLEND_MULT)
+            screen.blit(tunnels, screen_pos)
 
     def on_key_down(self, key, mod, unicode):
         if key == keys.ESCAPE: