Text is rendered without a black box

This makes it look nicer, IMO. textBox doesn't use Image, since TextBox is
more specialized.

src/common/text_box.cpp

@@ -45,20 +45,24 @@ SDL_Texture* renderTextTexture(SDL_Renderer* renderer, TTF_Font* font, std::stri
 	return texture;
 }
 
+TextBox::TextBox() {
+	//
+}
+
+TextBox::~TextBox() {
+	ClearText();
+}
+
 void TextBox::DrawTo(SDL_Renderer* renderer) {
-	image.DrawTo(renderer, posX, posY);
+	SDL_Rect dclip = {posX, posY, 0, 0};
+	SDL_QueryTexture(texture, nullptr, nullptr, &dclip.w, &dclip.h);
+	SDL_RenderCopy(renderer, texture, nullptr, &dclip);
 }
 
 void TextBox::SetText(SDL_Renderer* renderer, TTF_Font* font, std::string str, SDL_Color color) {
-	//make the new texture
-	SDL_Texture* newText = renderTextTexture(renderer, font, str, color);
-
-	//copy the texture
-	image.Free();
-	image.CopyTexture(renderer, newText);
-
-	//cleanup
-	SDL_DestroyTexture(newText);
+	//just use the above global function
+	SDL_DestroyTexture(texture);
+	texture = renderTextTexture(renderer, font, str, color);
 }
 
 void TextBox::AddText(SDL_Renderer* renderer, TTF_Font* font, std::string str, SDL_Color color) {
@@ -66,5 +70,5 @@ void TextBox::AddText(SDL_Renderer* renderer, TTF_Font* font, std::string str, S
 }
 
 void TextBox::ClearText() {
-	image.Free();
+	SDL_DestroyTexture(texture);
 }