From 9f244e88204491e85f1c086bc8d3478ea9c34770 Mon Sep 17 00:00:00 2001
From: Treeki <treeki@gmail.com>
Date: Tue, 12 Feb 2013 23:40:37 +0100
Subject: gigantic background hack

---
 src/levelspecial.cpp | 24 +++++++++++++++++++++---
 src/randomcrap.S     | 31 +++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 3 deletions(-)

(limited to 'src')

diff --git a/src/levelspecial.cpp b/src/levelspecial.cpp
index 3432002..962b87f 100644
--- a/src/levelspecial.cpp
+++ b/src/levelspecial.cpp
@@ -39,13 +39,18 @@ extern char SizerOn;
 extern char ZOrderOn;
 extern int GlobalStarsCollected;
 
+extern VEC2 BGScaleFront;
+extern VEC2 BGScaleBack;
+extern char BGScaleEnabled;
+
 extern u32 GameTimer;
 
 #define time *(u32*)((GameTimer) + 0x4)
 
 
-float GlobalSizeFloatModifications [] = {1, 0.25, 0.5, 0.75, 1.25, 1.5, 1.75, 2, 2.5, 3, 4, 5, 6, 7, 8, 10 };
-float GlobalRiderFloatModifications [] = {1, 0.6, 0.7, 0.9, 1, 1, 1, 1.1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 5};
+static const float GlobalSizeFloatModifications [] = {1, 0.25, 0.5, 0.75, 1.25, 1.5, 1.75, 2, 2.5, 3, 4, 5, 6, 7, 8, 10 };
+static const float GlobalRiderFloatModifications [] = {1, 0.6, 0.7, 0.9, 1, 1, 1, 1.1, 1.25, 1.5, 2, 2.5, 3, 3.5, 4, 5};
+static const float BGScaleChoices[] = {0.1f, 0.15f, 0.25f, 0.375f, 0.5f, 0.625f, 0.75f, 0.9f, 1.0f, 1.125f, 1.25f, 1.5f, 1.75f, 2.0f, 2.25f, 2.5f};
 
 bool NoMichaelBuble = false;
 
@@ -85,6 +90,7 @@ bool ResetAfterLevel(bool didItWork) {
 	NoMichaelBuble = false;
 	for (int i = 0; i < 4; i++)
 		Player_Flags[i] &= ~4;
+	BGScaleEnabled = 0;
 	return didItWork;
 }
 
@@ -193,7 +199,15 @@ void LevelSpecial_Update(LevelSpecial *self) {
 			case 8:
 				NoMichaelBuble = true;
 				break;
-	
+
+			case 9:
+				BGScaleEnabled = true;
+				BGScaleFront.x = BGScaleChoices[(self->settings >> 20) & 15];
+				BGScaleFront.y = BGScaleChoices[(self->settings >> 16) & 15];
+				BGScaleBack.x = BGScaleChoices[(self->settings >> 12) & 15];
+				BGScaleBack.y = BGScaleChoices[(self->settings >> 8) & 15];
+				break;
+
 			default:
 				break;
 		}
@@ -248,6 +262,10 @@ void LevelSpecial_Update(LevelSpecial *self) {
 			case 8:
 				NoMichaelBuble = false;
 				break;
+
+			case 9:
+				BGScaleEnabled = false;
+				break;
 	
 			default:
 				break;
diff --git a/src/randomcrap.S b/src/randomcrap.S
index edf5fef..2842d12 100644
--- a/src/randomcrap.S
+++ b/src/randomcrap.S
@@ -257,6 +257,37 @@ PowEvent:
 .extern set__10dFlagMgr_cFUcibbbUi
 .extern instance__10dFlagMgr_c
 
+.global GiganticBackgrounds
+GiganticBackgrounds:
+	lis r3, BGScale@h
+	ori r3, r3, BGScale@l
+	lbz r4, 8(r3)
+	cmpwi r4, 0
+	beq NoBGScale
+	lwz r4, 0x4E4(r31)
+	cmplwi r4, 0
+	beq dontUseBack
+	addi r3, r3, 8
+dontUseBack:
+
+	lfs f1, 0(r3)
+	stfs f1, 0xDC(r31)
+	lfs f1, 4(r3)
+	stfs f1, 0xE0(r31)
+NoBGScale:
+	lwz r31, 0x5C(r1)
+	lwz r0, 0x64(r1)
+	mtlr r0
+	addi r1, r1, 0x60
+	blr
+
+.data
+.global BGScaleFront, BGScaleBack, BGScaleEnabled
+BGScale:
+BGScaleFront: .float 1.0, 1.0
+BGScaleBack: .float 1.0, 1.0
+BGScaleEnabled: .byte 0
+
 #AllocLog:
 #	stwu r1, -0x20(r1)
 #	mflr r0
-- 
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