render marble.bmp on the background

CMakeLists.txt

@@ -20,7 +20,7 @@ add_executable(tibia main.c
         map.h
         bitmap.c
         bitmap.h
-        Objects.c
-        Objects.h)
+        objects.c
+        objects.h)
 
 target_link_libraries(tibia SDL3::SDL3)

app.c

@@ -35,7 +35,7 @@ void App_Init(App_t *app) {
 void App_Run(App_t *app) {
     while (app->isRunning) {
         Input_Poll(app);
-        Render_Frame();
+        Render_Frame(app);
     }
 }
 

app.h

@@ -5,7 +5,7 @@
 
 #include "bitmap.h"
 #include "config.h"
-#include "Objects.h"
+#include "objects.h"
 #include "map.h"
 #include "system.h"
 

bitmap.c

@@ -4,31 +4,48 @@
 
 #include "bitmap.h"
 
-#include <SDL3/SDL_log.h>
-#include <SDL3/SDL_messagebox.h>
-#include <SDL3/SDL_render.h>
+#include <SDL3/SDL.h>
+#include "window.h"
 
 bool Bitmap_Init(Bitmap_t* bitmap) {
-    bitmap->tibiaSurface = Bitmap_LoadFromFile("TIBIA.BMP");
-    if (!bitmap->tibiaSurface) {
-        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Error", "Bitmap_Init: couldn't load tibia.bmp", NULL);
+    SDL_Renderer* renderer = Window_GetRenderer();
+
+    SDL_Surface* tibiaSurface = Bitmap_LoadFromFile("TIBIA.BMP");
+    if (!tibiaSurface) {
+        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Error", "Bitmap_Init: couldn't load TIBIA.BMP", NULL);
         return false;
     }
 
-    bitmap->marbleSurface = Bitmap_LoadFromFile("MARBLE.BMP");
-    if (!bitmap->marbleSurface) {
-        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Error", "Bitmap_Init: couldn't load marble.bmp", NULL);
+    bitmap->tibiaTexture = SDL_CreateTextureFromSurface(renderer, tibiaSurface);
+    if (bitmap->tibiaTexture == NULL) {
+        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Error", "Bitmap_Init: couldn't create tibia texture", NULL);
         return false;
     }
 
+    SDL_DestroySurface(tibiaSurface);
+
+    SDL_Surface* marbleSurface = Bitmap_LoadFromFile("MARBLE.BMP");
+    if (!marbleSurface) {
+        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Error", "Bitmap_Init: couldn't load MARBLE.BMP", NULL);
+        return false;
+    }
+
+    bitmap->marbleTexture = SDL_CreateTextureFromSurface(renderer, marbleSurface);
+    if (bitmap->marbleTexture == NULL) {
+        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Error", "Bitmap_Init: couldn't create marble texture", NULL);
+        return false;
+    }
+
+    SDL_DestroySurface(marbleSurface);
+
     // TODO: Note: here, on the original client, it created a offscreen buffer of 36x36 pixels.
 
     return true;
 }
 
 void Bitmap_Destroy(const Bitmap_t* bitmap) {
-    SDL_DestroySurface(bitmap->tibiaSurface);
-    SDL_DestroySurface(bitmap->marbleSurface);
+    SDL_DestroyTexture(bitmap->tibiaTexture);
+    SDL_DestroyTexture(bitmap->marbleTexture);
 
     SDL_LogInfo(SDL_LOG_CATEGORY_CUSTOM, "Bitmap_Destroy: surfaces destroyed.");
 }

bitmap.h

@@ -4,11 +4,11 @@
 
 #ifndef TIBIA_BITMAP_H
 #define TIBIA_BITMAP_H
-#include <SDL3/SDL_surface.h>
+#include <SDL3/SDL.h>
 
 typedef struct Bitmap {
-    SDL_Surface* tibiaSurface;
-    SDL_Surface* marbleSurface;
+    SDL_Texture* tibiaTexture;
+    SDL_Texture* marbleTexture;
 } Bitmap_t ;
 
 bool Bitmap_Init(Bitmap_t* bitmap);

objects.c

@@ -2,7 +2,7 @@
 // Created by rov on 12/27/25.
 //
 
-#include "Objects.h"
+#include "objects.h"
 
 #include <stdlib.h>
 #include <string.h>

render.c

@@ -5,10 +5,41 @@
 #include "render.h"
 #include "window.h"
 
-void Render_Frame() {
+void Render_Frame(const App_t *app) {
     SDL_Renderer *renderer = Window_GetRenderer();
     SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
     SDL_RenderClear(renderer);
 
+    Render_MainWindowBackground(app);
+
     SDL_RenderPresent(renderer);
 }
+
+void Render_MainWindowBackground(const App_t *app) {
+    SDL_Renderer *renderer = Window_GetRenderer();
+
+    if (app->bitmap.marbleTexture == NULL) {
+        SDL_SetRenderDrawColor(renderer, 64, 64, 64, 255);
+        SDL_RenderClear(renderer);
+        return;
+    }
+
+    const int TILE_SIZE = 128;
+
+    // Calculate how many tiles we need to cover the screen
+    const int tilesX = app->metrics.screenWidth / TILE_SIZE + 1;
+    const int tilesY = app->metrics.screenHeight / TILE_SIZE + 1;
+
+    for (int y = 0; y < tilesY; y++) {
+        for (int x = 0; x < tilesX; x++) {
+            SDL_FRect destRect = {
+                (float) (x * TILE_SIZE),
+                (float) (y * TILE_SIZE),
+                (float) TILE_SIZE,
+                (float) TILE_SIZE
+            };
+
+            SDL_RenderTexture(renderer, app->bitmap.marbleTexture, NULL, &destRect);
+        }
+    }
+}

render.h

@@ -4,7 +4,13 @@
 
 #ifndef TIBIA_RENDER_H
 #define TIBIA_RENDER_H
+#include <SDL3/SDL_render.h>
 
-void Render_Frame();
+#include "app.h"
+
+void Render_Frame(const App_t* app);
+void Render_MainWindowBackground(const App_t* app);
+
+void Render_DrawWindowFrame(SDL_Renderer* renderer, int x, int y, int w, int h);
 
 #endif //TIBIA_RENDER_H