From 112d7756352108cf2b80a12a0f65ee3e071aabbf Mon Sep 17 00:00:00 2001
From: bjorn <tie.372@gmail.com>
Date: Sun, 11 Nov 2018 17:29:41 -0800
Subject: [PATCH] Font:hasGlyphs;

---
 src/api/types/font.c | 16 ++++++++++++++++
 src/graphics/font.c  |  4 ++++
 src/graphics/font.h  |  1 +
 3 files changed, 21 insertions(+)

diff --git a/src/api/types/font.c b/src/api/types/font.c
index 82841148..7d9997d3 100644
--- a/src/api/types/font.c
+++ b/src/api/types/font.c
@@ -59,6 +59,21 @@ int l_lovrFontSetPixelDensity(lua_State* L) {
   return 0;
 }
 
+int l_lovrFontHasGlyphs(lua_State* L) {
+  Font* font = luax_checktype(L, 1, Font);
+  Rasterizer* rasterizer = lovrFontGetRasterizer(font);
+  bool hasGlyphs = true;
+  for (int i = 2; i <= lua_gettop(L); i++) {
+    if (lua_type(L, i) == LUA_TSTRING) {
+      hasGlyphs &= lovrRasterizerHasGlyphs(rasterizer, lua_tostring(L, i));
+    } else {
+      hasGlyphs &= lovrRasterizerHasGlyph(rasterizer, luaL_checkinteger(L, i));
+    }
+  }
+  lua_pushboolean(L, hasGlyphs);
+  return 1;
+}
+
 const luaL_Reg lovrFont[] = {
   { "getWidth", l_lovrFontGetWidth },
   { "getHeight", l_lovrFontGetHeight },
@@ -69,5 +84,6 @@ const luaL_Reg lovrFont[] = {
   { "setLineHeight", l_lovrFontSetLineHeight },
   { "getPixelDensity", l_lovrFontGetPixelDensity },
   { "setPixelDensity", l_lovrFontSetPixelDensity },
+  { "hasGlyphs", l_lovrFontHasGlyphs },
   { NULL, NULL }
 };
diff --git a/src/graphics/font.c b/src/graphics/font.c
index eccfa07b..80b21a26 100644
--- a/src/graphics/font.c
+++ b/src/graphics/font.c
@@ -68,6 +68,10 @@ void lovrFontDestroy(void* ref) {
   free(font);
 }
 
+Rasterizer* lovrFontGetRasterizer(Font* font) {
+  return font->rasterizer;
+}
+
 void lovrFontRender(Font* font, const char* str, float wrap, HorizontalAlign halign, VerticalAlign valign, VertexPointer vertices, float* offsety, uint32_t* vertexCount) {
   FontAtlas* atlas = &font->atlas;
 
diff --git a/src/graphics/font.h b/src/graphics/font.h
index c86e1ce0..bd9abeae 100644
--- a/src/graphics/font.h
+++ b/src/graphics/font.h
@@ -41,6 +41,7 @@ typedef struct {
 
 Font* lovrFontCreate(Rasterizer* rasterizer);
 void lovrFontDestroy(void* ref);
+Rasterizer* lovrFontGetRasterizer(Font* font);
 void lovrFontRender(Font* font, const char* str, float wrap, HorizontalAlign halign, VerticalAlign valign, VertexPointer vertices, float* offsety, uint32_t* vertexCount);
 float lovrFontGetWidth(Font* font, const char* string, float wrap);
 float lovrFontGetHeight(Font* font);