From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 23 Nov 2012 08:33:27 +0000 (+0200)
Subject: Support non-square cells
X-Git-Tag: 1.0~13
X-Git-Url: http://git.tdb.fi/?p=ttf2png.git;a=commitdiff_plain;h=8c890869ac0dc6aa6714b3276519f1703fbfb66e

Support non-square cells
---

diff --git a/ttf2png.c b/ttf2png.c
index 67228e5..b61d51d 100644
--- a/ttf2png.c
+++ b/ttf2png.c
@@ -54,7 +54,7 @@ typedef struct sFont
 unsigned round_to_pot(unsigned);
 void usage();
 void init_font(Font *, FT_Face, unsigned, unsigned, int);
-void render_grid(Font *, unsigned, unsigned, int);
+void render_grid(Font *, unsigned, unsigned, unsigned, int);
 void render_packed(Font *);
 int save_defs(const char *, const Font *);
 int save_png(const char *, const Image *, char);
@@ -68,7 +68,8 @@ int main(int argc, char **argv)
 	int  end = 255;
 	int  size = 10;
 	int  cpl = 0;
-	int  cell = 0;
+	int  cellw = 0;
+	int  cellh = 0;
 	char autohinter = 0;
 	char seq = 0;
 	char alpha = 0;
@@ -132,7 +133,22 @@ int main(int argc, char **argv)
 			cpl = strtol(optarg, NULL, 0);
 			break;
 		case 'c':
-			cell = strtol(optarg, NULL, 0);
+			if(!strcmp(optarg, "auto"))
+			{
+				cellw = 0;
+				cellh = 0;
+			}
+			else if(!strcmp(optarg, "autorect"))
+			{
+				cellw = 0;
+				cellh = 1;
+			}
+			else
+			{
+				cellw = strtol(optarg, &ptr, 0);
+				if(ptr[0]=='x' && isdigit(ptr[1]))
+					cellh = strtol(ptr+1, NULL, 0);
+			}
 			break;
 		case 'o':
 			out_fn = optarg;
@@ -207,7 +223,7 @@ int main(int argc, char **argv)
 	if(pack)
 		render_packed(&font);
 	else
-		render_grid(&font, cell, cpl, seq);
+		render_grid(&font, cellw, cellh, cpl, seq);
 	save_png(out_fn, &font.image, alpha);
 	if(def_fn)
 		save_defs(def_fn, &font);
@@ -329,7 +345,7 @@ void init_font(Font *font, FT_Face face, unsigned first, unsigned last, int auto
 		printf("Loaded %u glyphs\n", font->n_glyphs);
 }
 
-void render_grid(Font *font, unsigned cell, unsigned cpl, int seq)
+void render_grid(Font *font, unsigned cellw, unsigned cellh, unsigned cpl, int seq)
 {
 	unsigned i;
 	int      top = 0, bot = 0;
@@ -359,19 +375,27 @@ void render_grid(Font *font, unsigned cell, unsigned cpl, int seq)
 			maxh = font->glyphs[i].image.h;
 	}
 
-	if(cell==0)
+	if(cellw==0)
 	{
-		cell = top-bot;
-		if(maxw>cell)
-			cell = maxw;
+		int square = (cellh==cellw);
+		cellw = maxw;
+		cellh = top-bot;
+		if(square)
+		{
+			if(cellh>cellw)
+				cellw = cellh;
+			else
+				cellh = cellw;
+		}
 	}
 
 	if(verbose>=1)
 	{
 		printf("Max size:  %u x %u\n", maxw, maxh);
 		printf("Y range:   [%d %d]\n", bot, top);
-		if(maxw>cell || top-bot>cell)
-			fprintf(stderr, "Warning: character size exceeds cell size (%d)\n", cell);
+		printf("Cell size: %u x %u\n", cellw, cellh);
+		if(maxw>cellw || top-bot>cellh)
+			fprintf(stderr, "Warning: character size exceeds cell size\n");
 	}
 
 	if(cpl==0)
@@ -379,17 +403,17 @@ void render_grid(Font *font, unsigned cell, unsigned cpl, int seq)
 		unsigned count = (seq ? font->n_glyphs : last-first+1);
 		for(i=1;; i<<=1)
 		{
-			cpl = i/cell;
-			if(cpl>0 && (count+cpl-1)/cpl<=cpl)
+			cpl = i/cellw;
+			if(cpl>0 && (count+cpl-1)/cpl*cellh<=cpl*cellw)
 				break;
 		}
 	}
 
-	font->image.w = round_to_pot(cpl*cell);
+	font->image.w = round_to_pot(cpl*cellw);
 	if(seq && font->n_glyphs<last-first+1)
-		font->image.h = (font->n_glyphs+cpl-1)/cpl*cell;
+		font->image.h = (font->n_glyphs+cpl-1)/cpl*cellh;
 	else
-		font->image.h = (last-first+cpl)/cpl*cell;
+		font->image.h = (last-first+cpl)/cpl*cellh;
 	font->image.h = round_to_pot(font->image.h);
 
 	font->image.data = (char *)malloc(font->image.w*font->image.h);
@@ -398,24 +422,21 @@ void render_grid(Font *font, unsigned cell, unsigned cpl, int seq)
 	for(i=0; i<font->n_glyphs; ++i)
 	{
 		Glyph    *glyph;
-		int      cx, cy;
+		int      ci, cx, cy;
 		unsigned x, y;
 
 		glyph = &font->glyphs[i];
 
 		if(seq)
-		{
-			cx = (i%cpl)*cell;
-			cy = (i/cpl)*cell;
-		}
+			ci = i;
 		else
-		{
-			cx = ((glyph->code-first)%cpl)*cell;
-			cy = ((glyph->code-first)/cpl)*cell;
-		}
+			ci = glyph->code-first;
+
+		cx = (ci%cpl)*cellw;
+		cy = (ci/cpl)*cellh;
 
-		if(cell>glyph->image.w)
-			cx += (cell-glyph->image.w)/2;
+		if(cellw>glyph->image.w)
+			cx += (cellw-glyph->image.w)/2;
 		cy += top-glyph->offset_y-glyph->image.h;
 
 		glyph->x = cx;