From f2cae9dbd96fde6eeb47d2f3ba3404944230dfba Mon Sep 17 00:00:00 2001
From: zlago
Date: Tue, 28 Jan 2025 18:35:26 +0100
Subject: fix rendering tiny rooms

---
 src/main.c       | 49 +++++++++++++++++++++++++++++++++++++------------
 src/res/test.tmx |  4 ++--
 src/res/tiny.tmx | 54 +++++++++++++++++++++++-------------------------------
 src/tilemap.c    | 26 ++++++++++++++++++++++++--
 4 files changed, 86 insertions(+), 47 deletions(-)

diff --git a/src/main.c b/src/main.c
index 41c239b..ce94712 100644
--- a/src/main.c
+++ b/src/main.c
@@ -240,10 +240,19 @@ int game_load_level(char *level) {
 
 			game_state = STATE_FADE_OUT;
 			fade = 255;
-			int x = (entities.player[0].x / 16) - (WINDOW_WIDTH / 2);
-			int y = (entities.player[0].y / 16) - (WINDOW_HEIGHT / 2);
-			if (x < 0) {x = 0;} else if (x + WINDOW_WIDTH > tilemap->width * 8) {x = tilemap->width * 8 - WINDOW_WIDTH;}
-			if (y < 0) {y = 0;} else if (y + WINDOW_HEIGHT > tilemap->height * 8) {y = tilemap->height * 8 - WINDOW_HEIGHT;}
+			int x, y;
+			if (tilemap->width < WINDOW_WIDTH / 8) {
+				x = -((WINDOW_WIDTH - tilemap->width * 8) / 2);
+			} else {
+				x = (entities.player[0].x / 16) - (WINDOW_WIDTH / 2);
+				if (x < 0) {x = 0;} else if (x + WINDOW_WIDTH > tilemap->width * 8) {x = tilemap->width * 8 - WINDOW_WIDTH;}
+			}
+			if (tilemap->height <= WINDOW_HEIGHT / 8) {
+				y = -((WINDOW_HEIGHT - tilemap->height * 8) / 2);
+			} else {
+				y = (entities.player[0].y / 16) - (WINDOW_HEIGHT / 2);
+				if (y < 0) {y = 0;} else if (y + WINDOW_HEIGHT > tilemap->height * 8) {y = tilemap->height * 8 - WINDOW_HEIGHT;}
+			}
 			
 			game_render(framebuffer, x, y);
 			SDL_SetRenderTarget(renderer, NULL);
@@ -654,10 +663,18 @@ void main_loop(void) {
 					}
 				}
 				
-				x = (entities.player[0].x / 16) - (WINDOW_WIDTH / 2);
-				y = (entities.player[0].y / 16) - (WINDOW_HEIGHT / 2);
-				if (x < 0) {x = 0;} else if (x + WINDOW_WIDTH > tilemap->width * 8) {x = tilemap->width * 8 - WINDOW_WIDTH;}
-				if (y < 0) {y = 0;} else if (y + WINDOW_HEIGHT > tilemap->height * 8) {y = tilemap->height * 8 - WINDOW_HEIGHT;}
+				if (tilemap->width < WINDOW_WIDTH / 8) {
+					x = -((WINDOW_WIDTH - tilemap->width * 8) / 2);
+				} else {
+					x = (entities.player[0].x / 16) - (WINDOW_WIDTH / 2);
+					if (x < 0) {x = 0;} else if (x + WINDOW_WIDTH > tilemap->width * 8) {x = tilemap->width * 8 - WINDOW_WIDTH;}
+				}
+				if (tilemap->height <= WINDOW_HEIGHT / 8) {
+					y = -((WINDOW_HEIGHT - tilemap->height * 8) / 2);
+				} else {
+					y = (entities.player[0].y / 16) - (WINDOW_HEIGHT / 2);
+					if (y < 0) {y = 0;} else if (y + WINDOW_HEIGHT > tilemap->height * 8) {y = tilemap->height * 8 - WINDOW_HEIGHT;}
+				}
 				
 				game_render(framebuffer, x, y);
 				game_render_flush(framebuffer);
@@ -675,10 +692,18 @@ void main_loop(void) {
 				if (fade == 255) {
 					if (game_load_level(game_next_level)) {
 						game_state = STATE_FADE_OUT;
-						x = (entities.player[0].x / 16) - (WINDOW_WIDTH / 2);
-						y = (entities.player[0].y / 16) - (WINDOW_HEIGHT / 2);
-						if (x < 0) {x = 0;} else if (x + WINDOW_WIDTH > tilemap->width * 8) {x = tilemap->width * 8 - WINDOW_WIDTH;}
-						if (y < 0) {y = 0;} else if (y + WINDOW_HEIGHT > tilemap->height * 8) {y = tilemap->height * 8 - WINDOW_HEIGHT;}
+						if (tilemap->width < WINDOW_WIDTH / 8) {
+							x = -((WINDOW_WIDTH - tilemap->width * 8) / 2);
+						} else {
+							x = (entities.player[0].x / 16) - (WINDOW_WIDTH / 2);
+							if (x < 0) {x = 0;} else if (x + WINDOW_WIDTH > tilemap->width * 8) {x = tilemap->width * 8 - WINDOW_WIDTH;}
+						}
+						if (tilemap->height <= WINDOW_HEIGHT / 8) {
+							y = -((WINDOW_HEIGHT - tilemap->height * 8) / 2);
+						} else {
+							y = (entities.player[0].y / 16) - (WINDOW_HEIGHT / 2);
+							if (y < 0) {y = 0;} else if (y + WINDOW_HEIGHT > tilemap->height * 8) {y = tilemap->height * 8 - WINDOW_HEIGHT;}
+						}
 						
 						game_render(framebuffer, x, y);
 						SDL_SetRenderTarget(renderer, NULL);
diff --git a/src/res/test.tmx b/src/res/test.tmx
index 5ac87be..a449d81 100644
--- a/src/res/test.tmx
+++ b/src/res/test.tmx
@@ -43,8 +43,8 @@
   <object id="5" name="tiny" type="warp" x="0" y="96" width="8" height="40">
    <properties>
     <property name="map" type="file" value="tiny.tmx"/>
-    <property name="tox" type="int" value="96"/>
-    <property name="toy" type="int" value="64"/>
+    <property name="tox" type="int" value="48"/>
+    <property name="toy" type="int" value="48"/>
    </properties>
   </object>
   <object id="6" name="walky" type="walker" x="112" y="112">
diff --git a/src/res/tiny.tmx b/src/res/tiny.tmx
index 6d593af..ece2481 100644
--- a/src/res/tiny.tmx
+++ b/src/res/tiny.tmx
@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<map version="1.10" tiledversion="1.11.0" orientation="orthogonal" renderorder="right-down" width="21" height="13" tilewidth="8" tileheight="8" infinite="0" nextlayerid="5" nextobjectid="3">
+<map version="1.10" tiledversion="1.11.0" orientation="orthogonal" renderorder="right-down" width="11" height="9" tilewidth="8" tileheight="8" infinite="0" nextlayerid="5" nextobjectid="3">
  <tileset firstgid="1" source="autotiles.tsx"/>
  <tileset firstgid="33" source="tileset.tsx"/>
  <objectgroup id="4" name="Object Layer 1">
-  <object id="1" name="test" type="warp" x="104" y="32" width="8" height="32">
+  <object id="1" name="test" type="warp" x="64" y="16" width="8" height="32">
    <properties>
     <property name="map" type="file" value="test.tmx"/>
     <property name="tox" type="int" value="16"/>
     <property name="toy" type="int" value="128"/>
    </properties>
   </object>
-  <object id="2" name="lavender disk" type="save" x="88" y="64">
+  <object id="2" name="lavender disk" type="save" x="48" y="48">
    <properties>
     <property name="color" type="color" value="#ff9d56d0"/>
    </properties>
@@ -21,38 +21,30 @@
   <properties>
    <property name="middleground" type="bool" value="true"/>
   </properties>
-  <layer id="1" name="Tile Layer 1" width="21" height="13" offsetx="-4" offsety="-4">
+  <layer id="1" name="Tile Layer 1" width="11" height="9" offsetx="-4" offsety="-4">
    <data encoding="csv">
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,9,13,13,13,13,13,5,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,3,4,4,4,4,4,2,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,9,13,13,13,13,13,5,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,3,4,4,4,4,4,2,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+0,0,0,0,0,0,0,0,0,0,0,
+0,0,9,13,13,13,13,13,5,0,0,
+0,0,3,4,4,4,4,4,2,0,0,
+0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,
+0,0,9,13,13,13,13,13,5,0,0,
+0,0,3,4,4,4,4,4,2,0,0,
+0,0,0,0,0,0,0,0,0,0,0
 </data>
   </layer>
-  <layer id="2" name="Tile Layer 2" width="21" height="13">
+  <layer id="2" name="Tile Layer 2" width="11" height="9">
    <data encoding="csv">
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,38,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,56,53,54,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,38,0,0,0,
+0,0,56,53,54,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0
 </data>
   </layer>
  </group>
diff --git a/src/tilemap.c b/src/tilemap.c
index 34e7c43..4819053 100644
--- a/src/tilemap.c
+++ b/src/tilemap.c
@@ -90,14 +90,36 @@ collision_T tilemap_area(struct tilemap *tilemap, int x1, int y1, int x2, int y2
 void tilemap_background(struct tilemap *tilemap, int x, int y, int w, int h) {
 	SDL_SetRenderDrawColor(renderer, tilemap->backdrop.r, tilemap->backdrop.g, tilemap->backdrop.b, tilemap->backdrop.a);
 	SDL_RenderFillRect(renderer, &(SDL_Rect) {0, 0, w, h});
+	int bx = 0, by = 0, vw = w, vh = h;
+	if (x < 0) {
+		bx = -x;
+		vw = w + x * 2;
+		x = 0;
+	}
+	if (y < 0) {
+		by = -y;
+		vh = h + y * 2;
+		y = 0;
+	}
 	for (int i = 0; i < tilemap->middleground; i++) {
-		SDL_RenderCopy(renderer, tilemap->tilemaps[i], &(SDL_Rect) {x * tilemap->parallax[i].x, y * tilemap->parallax[i].y, w, h}, &(SDL_Rect) {0, 0, w, h});
+		SDL_RenderCopy(renderer, tilemap->tilemaps[i], &(SDL_Rect) {x * tilemap->parallax[i].x, y * tilemap->parallax[i].y, vw, vh}, &(SDL_Rect) {bx, by, vw, vh});
 	}
 }
 
 void tilemap_foreground(struct tilemap *tilemap, int x, int y, int w, int h) {
+	int bx = 0, by = 0, vw = w, vh = h;
+	if (x < 0) {
+		bx = -x;
+		vw = w + x * 2;
+		x = 0;
+	}
+	if (y < 0) {
+		by = -y;
+		vh = h + y * 2;
+		y = 0;
+	}
 	for (int i = tilemap->middleground; i < tilemap->layers; i++) {
-		SDL_RenderCopy(renderer, tilemap->tilemaps[i], &(SDL_Rect) {x * tilemap->parallax[i].x, y * tilemap->parallax[i].y, w, h}, &(SDL_Rect) {0, 0, w, h});
+		SDL_RenderCopy(renderer, tilemap->tilemaps[i], &(SDL_Rect) {x * tilemap->parallax[i].x, y * tilemap->parallax[i].y, vw, vh}, &(SDL_Rect) {bx, by, vw, vh});
 	}
 }
 
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