From 6774d7aced6b324b3cd41e1a522197ee56b9db08 Mon Sep 17 00:00:00 2001
From: Eugene Sandulenko <sev@scummvm.org>
Date: Sun, 22 Mar 2020 01:39:04 +0100
Subject: [PATCH] GRAPHICS: MACGUI: Initial code for generating outlined fonts

---
 graphics/fonts/macfont.cpp | 24 ++++++++++++++++++++++--
 graphics/fonts/macfont.h   |  2 +-
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/graphics/fonts/macfont.cpp b/graphics/fonts/macfont.cpp
index a32fac710f3..2fdc00124f7 100644
--- a/graphics/fonts/macfont.cpp
+++ b/graphics/fonts/macfont.cpp
@@ -401,8 +401,9 @@ bool dododo;
 
 static void magnifyGray(Surface *src, int *dstGray, int width, int height, float scale);
 static void makeBold(Surface *src, int *dstGray, MacGlyph *glyph, int height);
+static void makeOutline(Surface *src, Surface *dst, MacGlyph *glyph, int height);
 
-MacFONTFont *MacFONTFont::scaleFont(const MacFONTFont *src, int newSize, bool bold, bool italic) {
+MacFONTFont *MacFONTFont::scaleFont(const MacFONTFont *src, int newSize, bool bold, bool italic, bool outline) {
 	if (!src) {
 		warning("Empty font reference in scale font");
 		return NULL;
@@ -413,12 +414,15 @@ MacFONTFont *MacFONTFont::scaleFont(const MacFONTFont *src, int newSize, bool bo
 		return NULL;
 	}
 
-	Graphics::Surface srcSurf;
+	Graphics::Surface srcSurf, tmpSurf;
 	srcSurf.create(MAX(src->getFontSize() * 2, newSize * 2), MAX(src->getFontSize() * 2, newSize * 2),
 				PixelFormat::createFormatCLUT8());
 	int dstGraySize = newSize * 2 * newSize;
 	int *dstGray = (int *)malloc(dstGraySize * sizeof(int));
 
+	tmpSurf.create(MAX(src->getFontSize() * 2, newSize * 2), MAX(src->getFontSize() * 2, newSize * 2),
+				PixelFormat::createFormatCLUT8());
+
 	float scale = (float)newSize / (float)src->getFontSize();
 
 	MacFONTdata data;
@@ -530,6 +534,10 @@ MacFONTFont *MacFONTFont::scaleFont(const MacFONTFont *src, int newSize, bool bo
 			}
 		}
 
+		if (outline) {
+			makeOutline(&srcSurf, &tmpSurf, glyph, data._fRectHeight);
+		}
+
 		byte *ptr = &data._bitImage[glyph->bitmapOffset / 8];
 
 		for (int y = 0; y < data._fRectHeight; y++) {
@@ -666,6 +674,18 @@ static void makeBold(Surface *src, int *dstGray, MacGlyph *glyph, int height) {
 	}
 }
 
+static void makeOutline(Surface *src, Surface *dst, MacGlyph *glyph, int height) {
+	glyph->width++;
+
+	for (uint16 y = 0; y < height; y++) {
+		byte *srcPtr = (byte *)src->getBasePtr(0, y);
+		byte *dstPtr = (byte *)dst->getBasePtr(0, y);
+
+		for (uint16 x = 0; x < glyph->width - 1; x++, srcPtr++, dstPtr++)
+			*dstPtr = *srcPtr ^ srcPtr[1];
+	}
+}
+
 void MacFONTFont::testBlit(const MacFONTFont *src, ManagedSurface *dst, int color, int x0, int y0, int width) {
 	for (int y = 0; y < src->_data._fRectHeight; y++) {
 		byte *srcRow = src->_data._bitImage + y * src->_data._rowWords;
diff --git a/graphics/fonts/macfont.h b/graphics/fonts/macfont.h
index cb11304eb2f..ace5f1fb900 100644
--- a/graphics/fonts/macfont.h
+++ b/graphics/fonts/macfont.h
@@ -159,7 +159,7 @@ public:
 
 	int getFontSize() const { return _data._size; }
 
-	static MacFONTFont *scaleFont(const MacFONTFont *src, int newSize, bool bold = false, bool italic = false);
+	static MacFONTFont *scaleFont(const MacFONTFont *src, int newSize, bool bold = false, bool italic = false, bool outline = false);
 	static void testBlit(const MacFONTFont *src, ManagedSurface *dst, int color, int x0, int y0, int width);
 
 private: