From 8ba55322c1c0080e40b96f535d7c672f3b77b570 Mon Sep 17 00:00:00 2001
From: tron <tron@openttd.org>
Date: Sat, 2 Sep 2006 06:36:30 +0000
Subject: [PATCH] (svn r6301) -Codechange: if () cascades -> switch ()

---
 gfx.c | 1118 +++++++++++++++++++++++++++++----------------------------
 1 file changed, 573 insertions(+), 545 deletions(-)

diff --git a/gfx.c b/gfx.c
index fdb49353bd..61b3c0a262 100644
--- a/gfx.c
+++ b/gfx.c
@@ -675,126 +675,129 @@ static void GfxBlitTileZoomIn(BlitterParams *bp)
 	Pixel *dst;
 	const byte *ctab;
 
-	if (bp->mode & 1) {
-		src_o += ReadLE16Aligned(src_o + bp->start_y * 2);
-
-		do {
+	src_o += ReadLE16Aligned(src_o + bp->start_y * 2);
+	switch (bp->mode) {
+		case 1:
 			do {
-				done = src_o[0];
-				num = done & 0x7F;
-				skip = src_o[1];
-				src = src_o + 2;
-				src_o += num + 2;
-
-				dst = bp->dst;
-
-				if ( (skip -= bp->start_x) > 0) {
-					dst += skip;
-				} else {
-					src -= skip;
-					num += skip;
-					if (num <= 0) continue;
-					skip = 0;
-				}
-
-				skip = skip + num - bp->width;
-				if (skip > 0) {
-					num -= skip;
-					if (num <= 0) continue;
-				}
-
-				ctab = _color_remap_ptr;
+				do {
+					done = src_o[0];
+					num = done & 0x7F;
+					skip = src_o[1];
+					src = src_o + 2;
+					src_o += num + 2;
+
+					dst = bp->dst;
+
+					if ( (skip -= bp->start_x) > 0) {
+						dst += skip;
+					} else {
+						src -= skip;
+						num += skip;
+						if (num <= 0) continue;
+						skip = 0;
+					}
+
+					skip = skip + num - bp->width;
+					if (skip > 0) {
+						num -= skip;
+						if (num <= 0) continue;
+					}
+
+					ctab = _color_remap_ptr;
+
+					for (; num >= 4; num -=4) {
+						dst[3] = ctab[src[3]];
+						dst[2] = ctab[src[2]];
+						dst[1] = ctab[src[1]];
+						dst[0] = ctab[src[0]];
+						dst += 4;
+						src += 4;
+					}
+					for (; num != 0; num--) *dst++ = ctab[*src++];
+				} while (!(done & 0x80));
 
-				for (; num >= 4; num -=4) {
-					dst[3] = ctab[src[3]];
-					dst[2] = ctab[src[2]];
-					dst[1] = ctab[src[1]];
-					dst[0] = ctab[src[0]];
-					dst += 4;
-					src += 4;
-				}
-				for (; num != 0; num--) *dst++ = ctab[*src++];
-			} while (!(done & 0x80));
+				bp->dst += bp->pitch;
+			} while (--bp->height != 0);
+			break;
 
-			bp->dst += bp->pitch;
-		} while (--bp->height != 0);
-	} else if (bp->mode & 2) {
-		src_o += ReadLE16Aligned(src_o + bp->start_y * 2);
-		do {
+		case 2:
 			do {
-				done = src_o[0];
-				num = done & 0x7F;
-				skip = src_o[1];
-				src_o += num + 2;
-
-				dst = bp->dst;
-
-				if ( (skip -= bp->start_x) > 0) {
-					dst += skip;
-				} else {
-					num += skip;
-					if (num <= 0) continue;
-					skip = 0;
-				}
-
-				skip = skip + num - bp->width;
-				if (skip > 0) {
-					num -= skip;
-					if (num <= 0) continue;
-				}
+				do {
+					done = src_o[0];
+					num = done & 0x7F;
+					skip = src_o[1];
+					src_o += num + 2;
+
+					dst = bp->dst;
+
+					if ( (skip -= bp->start_x) > 0) {
+						dst += skip;
+					} else {
+						num += skip;
+						if (num <= 0) continue;
+						skip = 0;
+					}
+
+					skip = skip + num - bp->width;
+					if (skip > 0) {
+						num -= skip;
+						if (num <= 0) continue;
+					}
+
+					ctab = _color_remap_ptr;
+					for (; num != 0; num--) {
+						*dst = ctab[*dst];
+						dst++;
+					}
+				} while (!(done & 0x80));
 
-				ctab = _color_remap_ptr;
-				for (; num != 0; num--) {
-					*dst = ctab[*dst];
-					dst++;
-				}
-			} while (!(done & 0x80));
+				bp->dst += bp->pitch;
+			} while (--bp->height != 0);
+			break;
 
-			bp->dst += bp->pitch;
-		} while (--bp->height != 0);
-	} else {
-		src_o += ReadLE16Aligned(src_o + bp->start_y * 2);
-		do {
+		default:
 			do {
-				done = src_o[0];
-				num = done & 0x7F;
-				skip = src_o[1];
-				src = src_o + 2;
-				src_o += num + 2;
-
-				dst = bp->dst;
-
-				if ( (skip -= bp->start_x) > 0) {
-					dst += skip;
-				} else {
-					src -= skip;
-					num += skip;
-					if (num <= 0) continue;
-					skip = 0;
-				}
-
-				skip = skip + num - bp->width;
-				if (skip > 0) {
-					num -= skip;
-					if (num <= 0) continue;
-				}
+				do {
+					done = src_o[0];
+					num = done & 0x7F;
+					skip = src_o[1];
+					src = src_o + 2;
+					src_o += num + 2;
+
+					dst = bp->dst;
+
+					if ( (skip -= bp->start_x) > 0) {
+						dst += skip;
+					} else {
+						src -= skip;
+						num += skip;
+						if (num <= 0) continue;
+						skip = 0;
+					}
+
+					skip = skip + num - bp->width;
+					if (skip > 0) {
+						num -= skip;
+						if (num <= 0) continue;
+					}
 #if defined(_WIN32)
-				if (num & 1) *dst++ = *src++;
-				if (num & 2) { *(uint16*)dst = *(uint16*)src; dst += 2; src += 2; }
-				if (num >>= 2) {
-					do {
-						*(uint32*)dst = *(uint32*)src;
-						dst += 4;
-						src += 4;
-					} while (--num != 0);
-				}
+					if (num & 1) *dst++ = *src++;
+					if (num & 2) { *(uint16*)dst = *(uint16*)src; dst += 2; src += 2; }
+					if (num >>= 2) {
+						do {
+							*(uint32*)dst = *(uint32*)src;
+							dst += 4;
+							src += 4;
+						} while (--num != 0);
+					}
 #else
-				memcpy(dst, src, num);
+					memcpy(dst, src, num);
 #endif
-			} while (!(done & 0x80));
+				} while (!(done & 0x80));
 
-			bp->dst += bp->pitch;
-		} while (--bp->height != 0);
+				bp->dst += bp->pitch;
+			} while (--bp->height != 0);
+			break;
 	}
 }
 
@@ -809,62 +812,68 @@ static void GfxBlitZoomInUncomp(BlitterParams *bp)
 	assert(height > 0);
 	assert(width > 0);
 
-	if (bp->mode & 1) {
-		if (bp->info & 1) {
-			const byte *ctab = _color_remap_ptr;
+	switch (bp->mode) {
+		case 1:
+			if (bp->info & 1) {
+				const byte *ctab = _color_remap_ptr;
 
-			do {
-				for (i = 0; i != width; i++) {
-					byte b = ctab[src[i]];
+				do {
+					for (i = 0; i != width; i++) {
+						byte b = ctab[src[i]];
+
+						if (b != 0) dst[i] = b;
+					}
+					src += bp->width_org;
+					dst += bp->pitch;
+				} while (--height != 0);
+			}
+			break;
 
-					if (b != 0) dst[i] = b;
-				}
-				src += bp->width_org;
-				dst += bp->pitch;
-			} while (--height != 0);
-		}
-	} else if (bp->mode & 2) {
-		if (bp->info & 1) {
-			const byte *ctab = _color_remap_ptr;
+		case 2:
+			if (bp->info & 1) {
+				const byte *ctab = _color_remap_ptr;
 
-			do {
-				for (i = 0; i != width; i++)
-					if (src[i] != 0) dst[i] = ctab[dst[i]];
-				src += bp->width_org;
-				dst += bp->pitch;
-			} while (--height != 0);
-		}
-	} else {
-		if (!(bp->info & 1)) {
-			do {
-				memcpy(dst, src, width);
-				src += bp->width_org;
-				dst += bp->pitch;
-			} while (--height != 0);
-		} else {
-			do {
-				int n = width;
+				do {
+					for (i = 0; i != width; i++)
+						if (src[i] != 0) dst[i] = ctab[dst[i]];
+					src += bp->width_org;
+					dst += bp->pitch;
+				} while (--height != 0);
+			}
+			break;
 
-				for (; n >= 4; n -= 4) {
-					if (src[0] != 0) dst[0] = src[0];
-					if (src[1] != 0) dst[1] = src[1];
-					if (src[2] != 0) dst[2] = src[2];
-					if (src[3] != 0) dst[3] = src[3];
+		default:
+			if (!(bp->info & 1)) {
+				do {
+					memcpy(dst, src, width);
+					src += bp->width_org;
+					dst += bp->pitch;
+				} while (--height != 0);
+			} else {
+				do {
+					int n = width;
 
-					dst += 4;
-					src += 4;
-				}
+					for (; n >= 4; n -= 4) {
+						if (src[0] != 0) dst[0] = src[0];
+						if (src[1] != 0) dst[1] = src[1];
+						if (src[2] != 0) dst[2] = src[2];
+						if (src[3] != 0) dst[3] = src[3];
 
-				for (; n != 0; n--) {
-					if (src[0] != 0) dst[0] = src[0];
-					src++;
-					dst++;
-				}
+						dst += 4;
+						src += 4;
+					}
 
-				src += bp->width_org - width;
-				dst += bp->pitch - width;
-			} while (--height != 0);
-		}
+					for (; n != 0; n--) {
+						if (src[0] != 0) dst[0] = src[0];
+						src++;
+						dst++;
+					}
+
+					src += bp->width_org - width;
+					dst += bp->pitch - width;
+				} while (--height != 0);
+			}
+			break;
 	}
 }
 
@@ -877,151 +886,155 @@ static void GfxBlitTileZoomMedium(BlitterParams *bp)
 	Pixel *dst;
 	const byte *ctab;
 
-	if (bp->mode & 1) {
-		src_o += ReadLE16Aligned(src_o + bp->start_y * 2);
-		do {
+	src_o += ReadLE16Aligned(src_o + bp->start_y * 2);
+	switch (bp->mode) {
+		case 1:
 			do {
-				done = src_o[0];
-				num = done & 0x7F;
-				skip = src_o[1];
-				src = src_o + 2;
-				src_o += num + 2;
-
-				dst = bp->dst;
-
-				if (skip & 1) {
-					skip++;
-					src++;
-					if (--num == 0) continue;
-				}
-
-				if ( (skip -= bp->start_x) > 0) {
-					dst += skip >> 1;
-				} else {
-					src -= skip;
-					num += skip;
-					if (num <= 0) continue;
-					skip = 0;
-				}
-
-				skip = skip + num - bp->width;
-				if (skip > 0) {
-					num -= skip;
-					if (num <= 0) continue;
-				}
+				do {
+					done = src_o[0];
+					num = done & 0x7F;
+					skip = src_o[1];
+					src = src_o + 2;
+					src_o += num + 2;
+
+					dst = bp->dst;
+
+					if (skip & 1) {
+						skip++;
+						src++;
+						if (--num == 0) continue;
+					}
+
+					if ( (skip -= bp->start_x) > 0) {
+						dst += skip >> 1;
+					} else {
+						src -= skip;
+						num += skip;
+						if (num <= 0) continue;
+						skip = 0;
+					}
+
+					skip = skip + num - bp->width;
+					if (skip > 0) {
+						num -= skip;
+						if (num <= 0) continue;
+					}
+
+					ctab = _color_remap_ptr;
+					num = (num + 1) >> 1;
+					for (; num != 0; num--) {
+							*dst = ctab[*src];
+							dst++;
+							src += 2;
+					}
+				} while (!(done & 0x80));
+				bp->dst += bp->pitch;
+				if (--bp->height == 0) return;
 
-				ctab = _color_remap_ptr;
-				num = (num + 1) >> 1;
-				for (; num != 0; num--) {
-						*dst = ctab[*src];
-						dst++;
-						src += 2;
-				}
-			} while (!(done & 0x80));
-			bp->dst += bp->pitch;
-			if (--bp->height == 0) return;
+				do {
+					done = src_o[0];
+					src_o += (done & 0x7F) + 2;
+				} while (!(done & 0x80));
+			} while (--bp->height != 0);
+			break;
 
+		case 2:
 			do {
-				done = src_o[0];
-				src_o += (done & 0x7F) + 2;
-			} while (!(done & 0x80));
-		} while (--bp->height != 0);
-	} else if (bp->mode & 2) {
-		src_o += ReadLE16Aligned(src_o + bp->start_y * 2);
-		do {
-			do {
-				done = src_o[0];
-				num = done & 0x7F;
-				skip = src_o[1];
-				src_o += num + 2;
-
-				dst = bp->dst;
-
-				if (skip & 1) {
-					skip++;
-					if (--num == 0) continue;
-				}
-
-				if ( (skip -= bp->start_x) > 0) {
-					dst += skip >> 1;
-				} else {
-					num += skip;
-					if (num <= 0) continue;
-					skip = 0;
-				}
-
-				skip = skip + num - bp->width;
-				if (skip > 0) {
-					num -= skip;
-					if (num <= 0) continue;
-				}
+				do {
+					done = src_o[0];
+					num = done & 0x7F;
+					skip = src_o[1];
+					src_o += num + 2;
+
+					dst = bp->dst;
+
+					if (skip & 1) {
+						skip++;
+						if (--num == 0) continue;
+					}
+
+					if ( (skip -= bp->start_x) > 0) {
+						dst += skip >> 1;
+					} else {
+						num += skip;
+						if (num <= 0) continue;
+						skip = 0;
+					}
+
+					skip = skip + num - bp->width;
+					if (skip > 0) {
+						num -= skip;
+						if (num <= 0) continue;
+					}
+
+					ctab = _color_remap_ptr;
+					num = (num + 1) >> 1;
+					for (; num != 0; num--) {
+							*dst = ctab[*dst];
+							dst++;
+					}
+				} while (!(done & 0x80));
+				bp->dst += bp->pitch;
+				if (--bp->height == 0) return;
 
-				ctab = _color_remap_ptr;
-				num = (num + 1) >> 1;
-				for (; num != 0; num--) {
-						*dst = ctab[*dst];
-						dst++;
-				}
-			} while (!(done & 0x80));
-			bp->dst += bp->pitch;
-			if (--bp->height == 0) return;
+				do {
+					done = src_o[0];
+					src_o += (done & 0x7F) + 2;
+				} while (!(done & 0x80));
+			} while (--bp->height != 0);
+			break;
 
+		default:
 			do {
-				done = src_o[0];
-				src_o += (done & 0x7F) + 2;
-			} while (!(done & 0x80));
-		} while (--bp->height != 0);
-	} else {
-		src_o += ReadLE16Aligned(src_o + bp->start_y * 2);
-		do {
-			do {
-				done = src_o[0];
-				num = done & 0x7F;
-				skip = src_o[1];
-				src = src_o + 2;
-				src_o += num + 2;
-
-				dst = bp->dst;
-
-				if (skip & 1) {
-					skip++;
-					src++;
-					if (--num == 0) continue;
-				}
-
-				if ( (skip -= bp->start_x) > 0) {
-					dst += skip >> 1;
-				} else {
-					src -= skip;
-					num += skip;
-					if (num <= 0) continue;
-					skip = 0;
-				}
-
-				skip = skip + num - bp->width;
-				if (skip > 0) {
-					num -= skip;
-					if (num <= 0) continue;
-				}
-
-				num = (num + 1) >> 1;
-
-				for (; num != 0; num--) {
-						*dst = *src;
-						dst++;
-						src += 2;
-				}
-
-			} while (!(done & 0x80));
-
-			bp->dst += bp->pitch;
-			if (--bp->height == 0) return;
+				do {
+					done = src_o[0];
+					num = done & 0x7F;
+					skip = src_o[1];
+					src = src_o + 2;
+					src_o += num + 2;
+
+					dst = bp->dst;
+
+					if (skip & 1) {
+						skip++;
+						src++;
+						if (--num == 0) continue;
+					}
+
+					if ( (skip -= bp->start_x) > 0) {
+						dst += skip >> 1;
+					} else {
+						src -= skip;
+						num += skip;
+						if (num <= 0) continue;
+						skip = 0;
+					}
+
+					skip = skip + num - bp->width;
+					if (skip > 0) {
+						num -= skip;
+						if (num <= 0) continue;
+					}
+
+					num = (num + 1) >> 1;
+
+					for (; num != 0; num--) {
+							*dst = *src;
+							dst++;
+							src += 2;
+					}
+
+				} while (!(done & 0x80));
+
+				bp->dst += bp->pitch;
+				if (--bp->height == 0) return;
 
-			do {
-				done = src_o[0];
-				src_o += (done & 0x7F) + 2;
-			} while (!(done & 0x80));
-		} while (--bp->height != 0);
+				do {
+					done = src_o[0];
+					src_o += (done & 0x7F) + 2;
+				} while (!(done & 0x80));
+			} while (--bp->height != 0);
+			break;
 	}
 }
 
@@ -1036,40 +1049,46 @@ static void GfxBlitZoomMediumUncomp(BlitterParams *bp)
 	assert(height > 0);
 	assert(width > 0);
 
-	if (bp->mode & 1) {
-		if (bp->info & 1) {
-			const byte *ctab = _color_remap_ptr;
+	switch (bp->mode) {
+		case 1:
+			if (bp->info & 1) {
+				const byte *ctab = _color_remap_ptr;
 
-			for (height >>= 1; height != 0; height--) {
-				for (i = 0; i != width >> 1; i++) {
-					byte b = ctab[src[i * 2]];
+				for (height >>= 1; height != 0; height--) {
+					for (i = 0; i != width >> 1; i++) {
+						byte b = ctab[src[i * 2]];
 
-					if (b != 0) dst[i] = b;
+						if (b != 0) dst[i] = b;
+					}
+					src += bp->width_org * 2;
+					dst += bp->pitch;
 				}
-				src += bp->width_org * 2;
-				dst += bp->pitch;
 			}
-		}
-	} else if (bp->mode & 2) {
-		if (bp->info & 1) {
-			const byte *ctab = _color_remap_ptr;
-
-			for (height >>= 1; height != 0; height--) {
-				for (i = 0; i != width >> 1; i++)
-					if (src[i * 2] != 0) dst[i] = ctab[dst[i]];
-				src += bp->width_org * 2;
-				dst += bp->pitch;
+			break;
+
+		case 2:
+			if (bp->info & 1) {
+				const byte *ctab = _color_remap_ptr;
+
+				for (height >>= 1; height != 0; height--) {
+					for (i = 0; i != width >> 1; i++)
+						if (src[i * 2] != 0) dst[i] = ctab[dst[i]];
+					src += bp->width_org * 2;
+					dst += bp->pitch;
+				}
 			}
-		}
-	} else {
-		if (bp->info & 1) {
-			for (height >>= 1; height != 0; height--) {
-				for (i = 0; i != width >> 1; i++)
-					if (src[i * 2] != 0) dst[i] = src[i * 2];
-				src += bp->width_org * 2;
-				dst += bp->pitch;
+			break;
+
+		default:
+			if (bp->info & 1) {
+				for (height >>= 1; height != 0; height--) {
+					for (i = 0; i != width >> 1; i++)
+						if (src[i * 2] != 0) dst[i] = src[i * 2];
+					src += bp->width_org * 2;
+					dst += bp->pitch;
+				}
 			}
-		}
+			break;
 	}
 }
 
@@ -1082,210 +1101,214 @@ static void GfxBlitTileZoomOut(BlitterParams *bp)
 	Pixel *dst;
 	const byte *ctab;
 
-	if (bp->mode & 1) {
-		src_o += ReadLE16Aligned(src_o + bp->start_y * 2);
-		for (;;) {
-			do {
-				done = src_o[0];
-				num = done & 0x7F;
-				skip = src_o[1];
-				src = src_o + 2;
-				src_o += num + 2;
-
-				dst = bp->dst;
-
-				if (skip & 1) {
-					skip++;
-					src++;
-					if (--num == 0) continue;
-				}
-
-				if (skip & 2) {
-					skip += 2;
-					src += 2;
-					num -= 2;
-					if (num <= 0) continue;
-				}
-
-				if ( (skip -= bp->start_x) > 0) {
-					dst += skip >> 2;
-				} else {
-					src -= skip;
-					num += skip;
-					if (num <= 0) continue;
-					skip = 0;
-				}
-
-				skip = skip + num - bp->width;
-				if (skip > 0) {
-					num -= skip;
-					if (num <= 0) continue;
-				}
-
-				ctab = _color_remap_ptr;
-				num = (num + 3) >> 2;
-				for (; num != 0; num--) {
-						*dst = ctab[*src];
-						dst++;
-						src += 4;
-				}
-			} while (!(done & 0x80));
-			bp->dst += bp->pitch;
-			if (--bp->height == 0) return;
-
-			do {
-				done = src_o[0];
-				src_o += (done & 0x7F) + 2;
-			} while (!(done & 0x80));
-			if (--bp->height == 0) return;
-
-			do {
-				done = src_o[0];
-				src_o += (done & 0x7F) + 2;
-			} while (!(done & 0x80));
-			if (--bp->height == 0) return;
-
-			do {
-				done = src_o[0];
-				src_o += (done & 0x7F) + 2;
-			} while (!(done & 0x80));
-			if (--bp->height == 0) return;
-		}
-	} else if (bp->mode & 2) {
-		src_o += ReadLE16Aligned(src_o + bp->start_y * 2);
-		for (;;) {
-			do {
-				done = src_o[0];
-				num = done & 0x7F;
-				skip = src_o[1];
-				src_o += num + 2;
-
-				dst = bp->dst;
-
-				if (skip & 1) {
-					skip++;
-					if (--num == 0) continue;
-				}
-
-				if (skip & 2) {
-					skip += 2;
-					num -= 2;
-					if (num <= 0) continue;
-				}
-
-				if ( (skip -= bp->start_x) > 0) {
-					dst += skip >> 2;
-				} else {
-					num += skip;
-					if (num <= 0) continue;
-					skip = 0;
-				}
-
-				skip = skip + num - bp->width;
-				if (skip > 0) {
-					num -= skip;
-					if (num <= 0) continue;
-				}
-
-				ctab = _color_remap_ptr;
-				num = (num + 3) >> 2;
-				for (; num != 0; num--) {
-						*dst = ctab[*dst];
-						dst++;
-				}
-
-			} while (!(done & 0x80));
-			bp->dst += bp->pitch;
-			if (--bp->height == 0) return;
-
-			do {
-				done = src_o[0];
-				src_o += (done & 0x7F) + 2;
-			} while (!(done & 0x80));
-			if (--bp->height == 0) return;
+	src_o += ReadLE16Aligned(src_o + bp->start_y * 2);
+	switch (bp->mode) {
+		case 1:
+			for (;;) {
+				do {
+					done = src_o[0];
+					num = done & 0x7F;
+					skip = src_o[1];
+					src = src_o + 2;
+					src_o += num + 2;
+
+					dst = bp->dst;
+
+					if (skip & 1) {
+						skip++;
+						src++;
+						if (--num == 0) continue;
+					}
+
+					if (skip & 2) {
+						skip += 2;
+						src += 2;
+						num -= 2;
+						if (num <= 0) continue;
+					}
+
+					if ( (skip -= bp->start_x) > 0) {
+						dst += skip >> 2;
+					} else {
+						src -= skip;
+						num += skip;
+						if (num <= 0) continue;
+						skip = 0;
+					}
+
+					skip = skip + num - bp->width;
+					if (skip > 0) {
+						num -= skip;
+						if (num <= 0) continue;
+					}
+
+					ctab = _color_remap_ptr;
+					num = (num + 3) >> 2;
+					for (; num != 0; num--) {
+							*dst = ctab[*src];
+							dst++;
+							src += 4;
+					}
+				} while (!(done & 0x80));
+				bp->dst += bp->pitch;
+				if (--bp->height == 0) return;
 
-			do {
-				done = src_o[0];
-				src_o += (done & 0x7F) + 2;
-			} while (!(done & 0x80));
-			if (--bp->height == 0) return;
+				do {
+					done = src_o[0];
+					src_o += (done & 0x7F) + 2;
+				} while (!(done & 0x80));
+				if (--bp->height == 0) return;
 
-			do {
-				done = src_o[0];
-				src_o += (done & 0x7F) + 2;
-			} while (!(done & 0x80));
-			if (--bp->height == 0) return;
-		}
-	} else {
-		src_o += ReadLE16Aligned(src_o + bp->start_y * 2);
-		for (;;) {
-			do {
-				done = src_o[0];
-				num = done & 0x7F;
-				skip = src_o[1];
-				src = src_o + 2;
-				src_o += num + 2;
-
-				dst = bp->dst;
-
-				if (skip & 1) {
-					skip++;
-					src++;
-					if (--num == 0) continue;
-				}
+				do {
+					done = src_o[0];
+					src_o += (done & 0x7F) + 2;
+				} while (!(done & 0x80));
+				if (--bp->height == 0) return;
 
-				if (skip & 2) {
-					skip += 2;
-					src += 2;
-					num -= 2;
-					if (num <= 0) continue;
-				}
+				do {
+					done = src_o[0];
+					src_o += (done & 0x7F) + 2;
+				} while (!(done & 0x80));
+				if (--bp->height == 0) return;
+			}
+			break;
 
-				if ( (skip -= bp->start_x) > 0) {
-					dst += skip >> 2;
-				} else {
-					src -= skip;
-					num += skip;
-					if (num <= 0) continue;
-					skip = 0;
-				}
+		case  2:
+			for (;;) {
+				do {
+					done = src_o[0];
+					num = done & 0x7F;
+					skip = src_o[1];
+					src_o += num + 2;
+
+					dst = bp->dst;
+
+					if (skip & 1) {
+						skip++;
+						if (--num == 0) continue;
+					}
+
+					if (skip & 2) {
+						skip += 2;
+						num -= 2;
+						if (num <= 0) continue;
+					}
+
+					if ( (skip -= bp->start_x) > 0) {
+						dst += skip >> 2;
+					} else {
+						num += skip;
+						if (num <= 0) continue;
+						skip = 0;
+					}
+
+					skip = skip + num - bp->width;
+					if (skip > 0) {
+						num -= skip;
+						if (num <= 0) continue;
+					}
+
+					ctab = _color_remap_ptr;
+					num = (num + 3) >> 2;
+					for (; num != 0; num--) {
+							*dst = ctab[*dst];
+							dst++;
+					}
+
+				} while (!(done & 0x80));
+				bp->dst += bp->pitch;
+				if (--bp->height == 0) return;
 
-				skip = skip + num - bp->width;
-				if (skip > 0) {
-					num -= skip;
-					if (num <= 0) continue;
-				}
+				do {
+					done = src_o[0];
+					src_o += (done & 0x7F) + 2;
+				} while (!(done & 0x80));
+				if (--bp->height == 0) return;
 
-				num = (num + 3) >> 2;
+				do {
+					done = src_o[0];
+					src_o += (done & 0x7F) + 2;
+				} while (!(done & 0x80));
+				if (--bp->height == 0) return;
 
-				for (; num != 0; num--) {
-						*dst = *src;
-						dst++;
-						src += 4;
-				}
-			} while (!(done & 0x80));
+				do {
+					done = src_o[0];
+					src_o += (done & 0x7F) + 2;
+				} while (!(done & 0x80));
+				if (--bp->height == 0) return;
+			}
+			break;
 
-			bp->dst += bp->pitch;
-			if (--bp->height == 0) return;
+		default:
+			for (;;) {
+				do {
+					done = src_o[0];
+					num = done & 0x7F;
+					skip = src_o[1];
+					src = src_o + 2;
+					src_o += num + 2;
+
+					dst = bp->dst;
+
+					if (skip & 1) {
+						skip++;
+						src++;
+						if (--num == 0) continue;
+					}
+
+					if (skip & 2) {
+						skip += 2;
+						src += 2;
+						num -= 2;
+						if (num <= 0) continue;
+					}
+
+					if ( (skip -= bp->start_x) > 0) {
+						dst += skip >> 2;
+					} else {
+						src -= skip;
+						num += skip;
+						if (num <= 0) continue;
+						skip = 0;
+					}
+
+					skip = skip + num - bp->width;
+					if (skip > 0) {
+						num -= skip;
+						if (num <= 0) continue;
+					}
+
+					num = (num + 3) >> 2;
+
+					for (; num != 0; num--) {
+							*dst = *src;
+							dst++;
+							src += 4;
+					}
+				} while (!(done & 0x80));
+
+				bp->dst += bp->pitch;
+				if (--bp->height == 0) return;
 
-			do {
-				done = src_o[0];
-				src_o += (done & 0x7F) + 2;
-			} while (!(done & 0x80));
-			if (--bp->height == 0) return;
+				do {
+					done = src_o[0];
+					src_o += (done & 0x7F) + 2;
+				} while (!(done & 0x80));
+				if (--bp->height == 0) return;
 
-			do {
-				done = src_o[0];
-				src_o += (done & 0x7F) + 2;
-			} while (!(done & 0x80));
-			if (--bp->height == 0) return;
+				do {
+					done = src_o[0];
+					src_o += (done & 0x7F) + 2;
+				} while (!(done & 0x80));
+				if (--bp->height == 0) return;
 
-			do {
-				done = src_o[0];
-				src_o += (done & 0x7F) + 2;
-			} while (!(done & 0x80));
-			if (--bp->height == 0) return;
-		}
+				do {
+					done = src_o[0];
+					src_o += (done & 0x7F) + 2;
+				} while (!(done & 0x80));
+				if (--bp->height == 0) return;
+			}
+			break;
 	}
 }
 
@@ -1300,44 +1323,49 @@ static void GfxBlitZoomOutUncomp(BlitterParams *bp)
 	assert(height > 0);
 	assert(width > 0);
 
-	if (bp->mode & 1) {
-		if (bp->info & 1) {
-			const byte *ctab = _color_remap_ptr;
+	switch (bp->mode) {
+		case 1:
+			if (bp->info & 1) {
+				const byte *ctab = _color_remap_ptr;
 
-			for (height >>= 2; height != 0; height--) {
-				for (i = 0; i != width >> 2; i++) {
-					byte b = ctab[src[i * 4]];
+				for (height >>= 2; height != 0; height--) {
+					for (i = 0; i != width >> 2; i++) {
+						byte b = ctab[src[i * 4]];
 
-					if (b != 0) dst[i] = b;
+						if (b != 0) dst[i] = b;
+					}
+					src += bp->width_org * 4;
+					dst += bp->pitch;
 				}
-				src += bp->width_org * 4;
-				dst += bp->pitch;
 			}
-		}
-	} else if (bp->mode & 2) {
-		if (bp->info & 1) {
-			const byte *ctab = _color_remap_ptr;
-
-			for (height >>= 2; height != 0; height--) {
-				for (i = 0; i != width >> 2; i++)
-					if (src[i * 4] != 0) dst[i] = ctab[dst[i]];
-				src += bp->width_org * 4;
-				dst += bp->pitch;
+			break;
+
+		case 2:
+			if (bp->info & 1) {
+				const byte *ctab = _color_remap_ptr;
+
+				for (height >>= 2; height != 0; height--) {
+					for (i = 0; i != width >> 2; i++)
+						if (src[i * 4] != 0) dst[i] = ctab[dst[i]];
+					src += bp->width_org * 4;
+					dst += bp->pitch;
+				}
 			}
-		}
-	} else {
-		if (bp->info & 1) {
-			for (height >>= 2; height != 0; height--) {
-				for (i = 0; i != width >> 2; i++)
-					if (src[i * 4] != 0) dst[i] = src[i * 4];
-				src += bp->width_org * 4;
-				dst += bp->pitch;
+			break;
+
+		default:
+			if (bp->info & 1) {
+				for (height >>= 2; height != 0; height--) {
+					for (i = 0; i != width >> 2; i++)
+						if (src[i * 4] != 0) dst[i] = src[i * 4];
+					src += bp->width_org * 4;
+					dst += bp->pitch;
+				}
 			}
-		}
+			break;
 	}
 }
 
-typedef void (*BlitZoomFunc)(BlitterParams *bp);
 
 static void GfxMainBlitter(const Sprite *sprite, int x, int y, int mode)
 {