SDL 2.0 enlarge texture - c++

Question

In order to make buttons, I create and render texture that way:
typedef struct{
SDL_Rect pos;
SDL_Texture* texture;
int hovered;
} button;
button getButton(int x, int y, char * label, TTF_Font* font, SDL_Color color){
button btn;
btn.hovered = false;
btn.pos.x = x;
btn.pos.y = y;
SDL_Surface* surface = TTF_RenderText_Solid(font, label, color);
btn.pos.w = surface->w;
btn.pos.h = surface->h;
btn.texture = SDL_CreateTextureFromSurface(renderer, surface);
SDL_FreeSurface(surface);
return btn;
}
void drawButton(button btn){
SDL_RenderCopyEx( renderer, btn.texture, NULL, &btn.pos, 0, NULL, SDL_FLIP_NONE);
if(btn.hovered){
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 0x00);
SDL_RenderDrawRect(renderer, &btn.pos);
}
The problem is that I get texture which size equals one of label. How can I increase texture pixel size without stretching it i.e. add blank spaces to the side of it?

Answer 1

Something like
void drawButton(button btn){
SDL_RenderCopyEx( renderer, btn.texture, NULL, &btn.pos, 0, NULL, SDL_FLIP_NONE);
if(btn.hovered){
int padding = 10;
SDL_Rect pos = {btn.pos.x - padding, btn.pos.y - padding,
btn.pos.w + 2*padding, btn.pos.h + 2*padding };
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 0x00);
SDL_RenderDrawRect(renderer, &pos);
}
}
That way only the size of the rectangle changes, obviously I just pulled 10 for the size of padding out of thin air, you'll want to pick something appropriate yourself.

Answer 2

Found a way to do it. To enlarge the texture you create surface representing background of button, then combine them:
button getButton(int x, int y, char * label, TTF_Font* font, SDL_Color color){
button btn;
btn.hovered = false;
btn.pos.x = x;
btn.pos.y = y;
SDL_Surface* surface = TTF_RenderText_Solid(font, label, color);
SDL_Surface* back = SDL_CreateRGBSurface(0, surface->w+10, surface->h+10,
32, 0, 0, 0, 0);// create a black background
SDL_Rect t = {5, 5, back->w, back->w}; // place in a background to place label
SDL_BlitSurface(surface, NULL, back, &t); // combining surfaces
btn.pos.w = back->w;
btn.pos.h = back->h;
btn.texture = SDL_CreateTextureFromSurface(renderer, back);
SDL_FreeSurface(surface);
return btn;
}