From 3d16c0a4e04c2e0efef49942350835ea11a0fc62 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=A9rald=20DeGroote?= <grosged@users.noreply.github.com>
Date: Mon, 7 Nov 2016 11:11:05 +0100
Subject: [PATCH 1/2] optimised _PrintUInt & _FillScreen

Slight optimisation of _PrintUInt,
Propose to include a faster fillscreen when color is null
---
 .../lib/src/graphics/graphx/v2/graphics_lib.asm | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/CEdev/lib/src/graphics/graphx/v2/graphics_lib.asm b/CEdev/lib/src/graphics/graphx/v2/graphics_lib.asm
index 809fa2de4..70a8fb693 100644
--- a/CEdev/lib/src/graphics/graphx/v2/graphics_lib.asm
+++ b/CEdev/lib/src/graphics/graphx/v2/graphics_lib.asm
@@ -238,14 +238,22 @@ _FillScreen:
 	ld	hl,3
 	add	hl,sp
 	ld	a,(hl)                      ; get the color index to use
-	ld	bc,lcdSize-1
 	ld	de,(currDrawBuffer)         ; de -> current buffer
+	or	a,a
+	jr	z,_FastFillScreen
 	sbc	hl,hl
 	add	hl,de
 	inc	de
 	ld	(hl),a                      ; store the new color
+	ld	bc,lcdSize-1
 	ldir                                ; fill the screen with color
 	ret
+_FastFillScreen:
+	ld	hl,$e40000
+	ld	bc,lcdSize
+	ldir
+	ret
+
 
 ;-------------------------------------------------------------------------------
 _SetPalette:
@@ -2630,10 +2638,9 @@ _PrintUInt_ASM:
 	ld	a,8
 	sub	a,c
 	ret	c                           ; make sure less than 8 
-	ld	c,a
-	ld	b,8
-	mlt	bc
-	ld	a,c
+	rla
+	rla
+	rla
 	ld	(Offset_SMC),a \.r          ; select the jump we need
 Offset_SMC =$+1
 	jr	$

From ac35e947255a7a31d368d5903c865cea277724cd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=A9rald=20DeGroote?= <grosged@users.noreply.github.com>
Date: Mon, 7 Nov 2016 13:59:41 +0100
Subject: [PATCH 2/2] A few minor optimisations here & there

---
 CEdev/lib/src/graphics/graphx/v2/graphics_lib.asm | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/CEdev/lib/src/graphics/graphx/v2/graphics_lib.asm b/CEdev/lib/src/graphics/graphx/v2/graphics_lib.asm
index 70a8fb693..ec1138aea 100644
--- a/CEdev/lib/src/graphics/graphx/v2/graphics_lib.asm
+++ b/CEdev/lib/src/graphics/graphx/v2/graphics_lib.asm
@@ -141,12 +141,12 @@ _SetClipRegion:
 ;  None
 	call	_SetFullScrnClip_ASM \.r    ; clip against the actual LCD screen
 	ld	iy,0
+	lea	bc,iy+12
 	add	iy,sp
 	call	_ClipRectRegion_ASM \.r     ; iy points to the start of the arguments
-	lea	hl,iy
 	ret	c
+	lea	hl,iy
 	ld	de,_xmin \.r                ; copy the variables in
-	ld	bc,12
 	ldir                                ; copy in the new structure
 	ret
 
@@ -981,11 +981,11 @@ _FillCircle_NoClip:
 ; Returns:
 ;  None
 	ld 	iy,0
+	lea	bc,iy+0
 	add	iy,sp
 	ld 	a,(iy+9)                    ; radius
 	or	a,a
 	ret	z
-	ld	bc,0
 	ld	c,a
 	ld 	hl,(currDrawBuffer)
 	ld 	d,lcdWidth/2
@@ -1991,13 +1991,13 @@ _ClipDraw_ASM:
 ;  DE : New X coordinate
 ;  NC : If offscreen
 	ld	ix,6                        ; get pointer to arguments
+	ld	iy,ix-6
 	add	ix,sp
 	ld	hl,(ix+3)
 	ld	a,(hl)
 	ld	de,tmpWidth \.r
 	ld	(de),a                     ; save tmpWidth
 	ld	(tmpSpriteWidth),a \.r     ; save tmpSpriteWidth
-	ld	iy,0
 	add	iy,de
 	inc	hl
 	ld	a,(hl)
@@ -2179,9 +2179,9 @@ _:	srl	h
 	sbc	hl,hl
 	ld	l,(iy+14)
 	ld	bc,(ix+12)
+	ld	(ix+-3),h
 	sbc	hl,bc
 	ld	(ix+-12),hl
-	ld	(ix+-3),0
 	jp	_Y_Loop_ASM \.r
 
 _X_Res_SMC =$+3
@@ -3202,11 +3202,10 @@ _LZDecompress:
 ;  None
 	push	ix
 	ld	ix,0
-	lea	bc,ix
+	lea	bc,ix+1
 	add	ix,sp
 	lea	hl,ix+-20
 	ld	sp,hl
-	inc	bc
 	ld	hl,(ix+12)
 	or	a,a
 	sbc	hl,bc