From 07af8a971aa53c50c67e87cbc67fa96e3024cad7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9mi=20Verschelde?= <rverschelde@gmail.com>
Date: Tue, 23 Aug 2022 16:57:31 +0200
Subject: [PATCH] nanosvg: Sync with upstream bd16c4e

(cherry picked from commit 052257e9b7dd3473a4456e4e775b008d7456202f)
---
 thirdparty/README.md             |  2 +-
 thirdparty/nanosvg/nanosvg.h     | 67 ++++++++++++++++++++++++++------
 thirdparty/nanosvg/nanosvgrast.h |  8 ++--
 3 files changed, 61 insertions(+), 16 deletions(-)

diff --git a/thirdparty/README.md b/thirdparty/README.md
index fe3e2552809..ea86b8bb6dc 100644
--- a/thirdparty/README.md
+++ b/thirdparty/README.md
@@ -399,7 +399,7 @@ Collection of single-file libraries used in Godot components.
 ## nanosvg
 
 - Upstream: https://github.com/memononen/nanosvg
-- Version: git (4c8f0139b62c6e7faa3b67ce1fbe6e63590ed148, 2022)
+- Version: git (bd16c4e6b2842e1f0286dc374d21f85c659862e5, 2022)
 - License: zlib
 
 Files extracted from the upstream source:
diff --git a/thirdparty/nanosvg/nanosvg.h b/thirdparty/nanosvg/nanosvg.h
index 0c586161609..bd90d05a737 100644
--- a/thirdparty/nanosvg/nanosvg.h
+++ b/thirdparty/nanosvg/nanosvg.h
@@ -181,8 +181,6 @@ void nsvgDelete(NSVGimage* image);
 #endif
 #endif
 
-#endif // NANOSVG_H
-
 #ifdef NANOSVG_IMPLEMENTATION
 
 #include <string.h>
@@ -1224,15 +1222,58 @@ static unsigned int nsvg__parseColorHex(const char* str)
 	return NSVG_RGB(128, 128, 128);
 }
 
+// Parse rgb color. The pointer 'str' must point at "rgb(" (4+ characters).
+// This function returns gray (rgb(128, 128, 128) == '#808080') on parse errors
+// for backwards compatibility. Note: other image viewers return black instead.
+
 static unsigned int nsvg__parseColorRGB(const char* str)
 {
-	unsigned int r=0, g=0, b=0;
-	float rf=0, gf=0, bf=0;
-	if (sscanf(str, "rgb(%u, %u, %u)", &r, &g, &b) == 3)		// decimal integers
-		return NSVG_RGB(r, g, b);
-	if (sscanf(str, "rgb(%f%%, %f%%, %f%%)", &rf, &gf, &bf) == 3)	// decimal integer percentage
-		return NSVG_RGB(roundf(rf*2.55f), roundf(gf*2.55f), roundf(bf*2.55f)); // (255 / 100.0f)
-	return NSVG_RGB(128, 128, 128);
+	int i;
+	unsigned int rgbi[3];
+	float rgbf[3];
+	// try decimal integers first
+	if (sscanf(str, "rgb(%u, %u, %u)", &rgbi[0], &rgbi[1], &rgbi[2]) != 3) {
+		// integers failed, try percent values (float, locale independent)
+		const char delimiter[3] = {',', ',', ')'};
+		str += 4; // skip "rgb("
+		for (i = 0; i < 3; i++) {
+			while (*str && (nsvg__isspace(*str))) str++; 	// skip leading spaces
+			if (*str == '+') str++;				// skip '+' (don't allow '-')
+			if (!*str) break;
+			rgbf[i] = nsvg__atof(str);
+
+			// Note 1: it would be great if nsvg__atof() returned how many
+			// bytes it consumed but it doesn't. We need to skip the number,
+			// the '%' character, spaces, and the delimiter ',' or ')'.
+
+			// Note 2: The following code does not allow values like "33.%",
+			// i.e. a decimal point w/o fractional part, but this is consistent
+			// with other image viewers, e.g. firefox, chrome, eog, gimp.
+
+			while (*str && nsvg__isdigit(*str)) str++;		// skip integer part
+			if (*str == '.') {
+				str++;
+				if (!nsvg__isdigit(*str)) break;		// error: no digit after '.'
+				while (*str && nsvg__isdigit(*str)) str++;	// skip fractional part
+			}
+			if (*str == '%') str++; else break;
+			while (nsvg__isspace(*str)) str++;
+			if (*str == delimiter[i]) str++;
+			else break;
+		}
+		if (i == 3) {
+			rgbi[0] = roundf(rgbf[0] * 2.55f);
+			rgbi[1] = roundf(rgbf[1] * 2.55f);
+			rgbi[2] = roundf(rgbf[2] * 2.55f);
+		} else {
+			rgbi[0] = rgbi[1] = rgbi[2] = 128;
+		}
+	}
+	// clip values as the CSS spec requires
+	for (i = 0; i < 3; i++) {
+		if (rgbi[i] > 255) rgbi[i] = 255;
+	}
+	return NSVG_RGB(rgbi[0], rgbi[1], rgbi[2]);
 }
 
 typedef struct NSVGNamedColor {
@@ -1640,9 +1681,9 @@ static void nsvg__parseUrl(char* id, const char* str)
 {
 	int i = 0;
 	str += 4; // "url(";
-	if (*str == '#')
+	if (*str && *str == '#')
 		str++;
-	while (i < 63 && *str != ')') {
+	while (i < 63 && *str && *str != ')') {
 		id[i] = *str++;
 		i++;
 	}
@@ -3007,4 +3048,6 @@ void nsvgDelete(NSVGimage* image)
 	free(image);
 }
 
-#endif
+#endif // NANOSVG_IMPLEMENTATION
+
+#endif // NANOSVG_H
diff --git a/thirdparty/nanosvg/nanosvgrast.h b/thirdparty/nanosvg/nanosvgrast.h
index 029043e6eb3..ffa913a8947 100644
--- a/thirdparty/nanosvg/nanosvgrast.h
+++ b/thirdparty/nanosvg/nanosvgrast.h
@@ -25,6 +25,8 @@
 #ifndef NANOSVGRAST_H
 #define NANOSVGRAST_H
 
+#include "nanosvg.h"
+
 #ifndef NANOSVGRAST_CPLUSPLUS
 #ifdef __cplusplus
 extern "C" {
@@ -72,8 +74,6 @@ void nsvgDeleteRasterizer(NSVGrasterizer*);
 #endif
 #endif
 
-#endif // NANOSVGRAST_H
-
 #ifdef NANOSVGRAST_IMPLEMENTATION
 
 #include <math.h>
@@ -1453,4 +1453,6 @@ void nsvgRasterize(NSVGrasterizer* r,
 	r->stride = 0;
 }
 
-#endif
+#endif // NANOSVGRAST_IMPLEMENTATION
+
+#endif // NANOSVGRAST_H