Added Text.cpp

ui/Text.cpp

@@ -0,0 +1,53 @@
+#include "Text.h"
+#include <SDL3/SDL_init.h>
+#include <cstdio>
+
+
+SDL_AppResult Text::OpenFont(fs::path fontPath) {
+
+    if (!TTF_Init()) {
+        SDL_Log("Couldn't initialize SDL_ttf: %s\n", SDL_GetError());
+        return SDL_APP_FAILURE;
+    }
+
+    loadedFont = TTF_OpenFont(fs::absolute(fontPath).c_str(), 12.0f);
+    if (!loadedFont) {
+        printf("Font not found! \n");
+        return SDL_APP_FAILURE;
+    }
+
+    color = WHITE;
+    return SDL_APP_CONTINUE;
+}
+
+bool Text::SetText(std::string text, Window *window) {
+    buffer += text;
+
+    SDL_DestroySurface(textRenderingSurface);
+    textRenderingSurface = TTF_RenderText_Blended(loadedFont, buffer.c_str(), 0, color);
+
+    if (textRenderingSurface) {
+        font_texture = SDL_CreateTextureFromSurface(window->GetRenderer(), textRenderingSurface);
+        SDL_DestroySurface(textRenderingSurface);
+    }
+    if (!font_texture) {
+        SDL_Log("Couldn't create text: %s\n", SDL_GetError());
+        return false;
+    }
+
+    return true;
+}
+
+void Text::Render() {
+    int w = 0, h = 0;
+    SDL_FRect dst;
+    const float scale = 4.0f;
+
+    /* Center the text and scale it up */
+    SDL_GetRenderOutputSize(window.GetRenderer(), &w, &h);
+    SDL_SetRenderScale(window.GetRenderer(), scale, scale);
+    SDL_GetTextureSize(font_texture, &dst.w, &dst.h);
+    dst.x = ((w / scale) - dst.w) / 2;
+    dst.y = ((h / scale) - dst.h) / 2;
+    SDL_RenderTexture(window.GetRenderer(), font_texture, NULL, &dst);
+}

ui/Text.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_init.h>
+#include <SDL3_ttf/SDL_textengine.h>
+#include <SDL3_ttf/SDL_ttf.h>
+#include <filesystem>
+#include <string>
+#include "fileCommon.h"
+#include "window.h"
+
+#define WHITE {255, 255, 255, SDL_ALPHA_OPAQUE}
+
+
+class Text {
+
+private:
+    std::string buffer;
+    TTF_Font *loadedFont = nullptr;
+
+    SDL_Surface *textRenderingSurface = nullptr;
+    SDL_Color color;
+
+    SDL_Texture *font_texture = nullptr;
+
+    /// ToDo: Replace with dynamic settings / loaded font
+    fs::path fontPath;
+
+
+public:
+    SDL_AppResult OpenFont(fs::path fontPath);
+    bool SetText(std::string text, Window *window);
+    void Render();
+    void CloseFont() { TTF_CloseFont(loadedFont); }
+};

ui/window.h

@@ -1,3 +1,5 @@
+#pragma once
+
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_init.h>
 #include <SDL3/SDL_render.h>
@@ -14,8 +16,8 @@ public:
     void Resize(int w, int h);
     void Close();
 
-    SDL_Window *GetWindow() { return window; }
-    SDL_Renderer *GetRenderer() { return renderer; }
+    SDL_Window *GetWindow() const { return window; }
+    SDL_Renderer *GetRenderer() const { return renderer; }
 };