Implement and test renderer.

1 files changed, 107 insertions, 5 deletions

diff --git a/src/area.c b/src/area.c
index 3a03198..ae8b071 100644
--- a/src/area.c
+++ b/src/area.c
@@ -2,6 +2,101 @@
 #include "area.h"
 #include "layer.h"
 #include "viewport.h"
+#include "resources/map.h"
+#include "logging.h"
+
+static void blit_map_layers(struct map *, struct area *);
+static void blit_map_layer(struct map *, enum map_layer_id,
+		struct area *, enum area_layer_id);
+
+struct area *
+area_new(struct map *map)
+{
+	struct area *a;
+
+	a = malloc(sizeof(*a));
+	if (a == NULL) {
+		return NULL;
+	}
+
+	blit_map_layers(map, a);
+
+	return a;
+}
+
+static void
+blit_map_layers(struct map *map, struct area *area)
+{
+	blit_map_layer(map, MAP_LAYER_GROUND, area, AREA_LAYER_GROUND);
+	blit_map_layer(map, MAP_LAYER_OBJ_LOW, area, AREA_LAYER_OBJ_LOW);
+	blit_map_layer(map, MAP_LAYER_OBJ_MID, area, AREA_LAYER_OBJ_MID);
+	blit_map_layer(map, MAP_LAYER_OBJ_HIGH, area, AREA_LAYER_OBJ_HIGH);
+}
+
+static void
+blit_map_layer(struct map *map, enum map_layer_id map_layer,
+		struct area *area, enum area_layer_id area_layer)
+{
+	int i;
+	Uint32 gid;
+	int tile_found;
+	struct map_tileset *mts;
+	Uint32 mts_lastgid;
+	SDL_Rect tilerect, layerrect;
+
+	area->map_layers[area_layer] = SDL_CreateRGBSurface(
+			SDL_SWSURFACE | SDL_SRCCOLORKEY | SDL_SRCALPHA,
+			map->width * map->tilewidth,
+			map->height * map->tileheight,
+			32,
+			0x000000FF,
+			0x0000FF00,
+			0x00FF0000,
+			0x00000000);
+	SDL_SetColorKey(area->map_layers[area_layer], SDL_SRCCOLORKEY, 0);
+	for (i = 0; i < map->width * map->height; ++i) {
+		gid = map->layers[map_layer].tiles[i];
+		if (gid == 0) {
+			continue;
+		}
+		tile_found = 0;
+		for (mts = map->tilesets_head; mts != NULL; mts = mts->next) {
+			mts_lastgid = mts->firstgid +
+				mts->tileset->width * mts->tileset->height;
+			if (gid >= mts->firstgid && gid < mts_lastgid) {
+				gid -= mts->firstgid;
+				tilerect.x = gid % mts->tileset->width;
+				tilerect.y = gid / mts->tileset->width;
+				tilerect.w = mts->tileset->tilewidth;
+				tilerect.h = mts->tileset->tileheight;
+				tilerect.x *= tilerect.w;
+				tilerect.y *= tilerect.h;
+				layerrect.x = i % map->width;
+				layerrect.y = i / map->width;
+				layerrect.w = mts->tileset->tilewidth;
+				layerrect.h = mts->tileset->tileheight;
+				layerrect.x *= layerrect.w;
+				layerrect.y *= layerrect.h;
+#if 0
+				debug("Blitting %dx%d tile at (%d,%d) "
+						"onto layer at (%d,%d)...",
+						tilerect.w, tilerect.h,
+						tilerect.x, tilerect.y,
+						layerrect.x, layerrect.y);
+#endif
+				SDL_BlitSurface(mts->tileset->image->image,
+						&tilerect,
+						area->map_layers[area_layer],
+						&layerrect);
+				tile_found = 1;
+				break;
+			}
+		}
+		if (!tile_found) {
+			warn("Tile with gid 0x%8.8x not found", gid);
+		}
+	}
+}
 
 void
 render_area_to_viewport(struct area *area, struct viewport *vp)
@@ -25,26 +120,33 @@ void
 render_area_to_surface(struct area *area, SDL_Rect *arearect,
 		SDL_Surface *dst, SDL_Rect *dstrect)
 {
+	debug("Rendering %dx%d area rect at (%d,%d) "
+			"onto %dx%d surface rect at (%d,%d)...",
+			arearect->w, arearect->h, arearect->x, arearect->y,
+			dstrect->w, dstrect->h, dstrect->x, dstrect->y);
+
 	/* Fast fill with black to avoid artifacts in off-map pixels. */
-	SDL_FillRect(dst, dstrect, 0);
+	/* NB: This is gray, at least temporarily. */
+	SDL_FillRect(dst, dstrect, SDL_MapRGB(dst->format, 63, 63, 63));
 
 	/* Blit ground layer. */
-	SDL_BlitSurface(area->map_layers[LAYER_GROUND], arearect,
+	SDL_BlitSurface(area->map_layers[AREA_LAYER_GROUND], arearect,
 			dst, dstrect);
 
 	/* Blit low objects layer. */
-	SDL_BlitSurface(area->map_layers[LAYER_OBJ_LOW], arearect,
+	SDL_BlitSurface(area->map_layers[AREA_LAYER_OBJ_LOW], arearect,
 			dst, dstrect);
+/*	return;*/
 
 	/* TODO: Blit low sprites. */
 
 	/* Blit middle objects layer. */
-	SDL_BlitSurface(area->map_layers[LAYER_OBJ_MID], arearect,
+	SDL_BlitSurface(area->map_layers[AREA_LAYER_OBJ_MID], arearect,
 			dst, dstrect);
 
 	/* TODO: Blit high sprites. */
 
 	/* Blit high objects layer. */
-	SDL_BlitSurface(area->map_layers[LAYER_OBJ_HIGH], arearect,
+	SDL_BlitSurface(area->map_layers[AREA_LAYER_OBJ_HIGH], arearect,
 			dst, dstrect);
 }