font changing on the fly

config/runtime-host.json

@@ -12,8 +12,8 @@
     "frameRate": "59.94"
   },
   "output": {
-    "backend": "ndi",
-    "device": "shader toys",
+    "backend": "decklink",
+    "device": "default",
     "resolution": "1080p",
     "frameRate": "59.94",
     "keying": {

src/render/runtime/RuntimeTextTextureCache.cpp

@@ -103,8 +103,14 @@ bool RuntimeTextTextureCache::EnsureTextTexture(TextTexture& texture)
 	const RuntimePreparedTextTexture* prepared = FindPreparedTexture(texture.parameterId);
 	if (!prepared || !prepared->rgbaPixels || prepared->rgbaPixels->empty() || prepared->width == 0 || prepared->height == 0)
 		return false;
-	if (texture.texture != 0 && texture.cachedText == prepared->textValue && texture.width == prepared->width && texture.height == prepared->height)
+	if (texture.texture != 0 &&
+		texture.cachedText == prepared->textValue &&
+		texture.cachedPixels == prepared->rgbaPixels &&
+		texture.width == prepared->width &&
+		texture.height == prepared->height)
+	{
 		return true;
+	}
 
 	if (texture.texture == 0)
 		glGenTextures(1, &texture.texture);
@@ -130,6 +136,7 @@ bool RuntimeTextTextureCache::EnsureTextTexture(TextTexture& texture)
 	glActiveTexture(GL_TEXTURE0);
 
 	texture.cachedText = prepared->textValue;
+	texture.cachedPixels = prepared->rgbaPixels;
 	texture.width = prepared->width;
 	texture.height = prepared->height;
 	texture.liveWidth = prepared->liveWidth;
@@ -154,4 +161,5 @@ void RuntimeTextTextureCache::DestroyTexture(TextTexture& texture)
 	texture.width = 0;
 	texture.height = 0;
 	texture.cachedText.clear();
+	texture.cachedPixels.reset();
 }

src/render/runtime/RuntimeTextTextureCache.h

@@ -4,6 +4,7 @@
 #include "RuntimeShaderArtifact.h"
 
 #include <map>
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -28,6 +29,7 @@ private:
 	{
 		std::string parameterId;
 		std::string cachedText;
+		std::shared_ptr<const std::vector<unsigned char>> cachedPixels;
 		GLuint texture = 0;
 		unsigned width = 0;
 		unsigned height = 0;