[examples] Improve core_smooth_pixelperfect (#5803)

* Improve smooth pixel-perfect example: add overscan and smoothing toggles

* Add render size

Author: rose-mtz

examples/core/core_smooth_pixelperfect.c

@@ -52,7 +52,7 @@ int main(void)
 
     // The target's height is flipped (in the source Rectangle), due to OpenGL reasons
     Rectangle sourceRec = { 0.0f, 0.0f, (float)target.texture.width, -(float)target.texture.height };
-    Rectangle destRec = { -virtualRatio, -virtualRatio, screenWidth + (virtualRatio*2), screenHeight + (virtualRatio*2) };
+    Rectangle destRec = { (screenWidth - screenWidth/1.25f)/2.0f, (screenHeight - screenHeight/1.25f)/2.0f, screenWidth/1.25f, screenHeight/1.25f };
 
     Vector2 origin = { 0.0f, 0.0f };
 
@@ -61,6 +61,9 @@ int main(void)
     float cameraX = 0.0f;
     float cameraY = 0.0f;
 
+    bool smoothOn = true;
+    bool overscan = false;
+
     SetTargetFPS(60);
     //--------------------------------------------------------------------------------------
 
@@ -86,6 +89,18 @@ int main(void)
         worldSpaceCamera.target.y = truncf(screenSpaceCamera.target.y);
         screenSpaceCamera.target.y -= worldSpaceCamera.target.y;
         screenSpaceCamera.target.y *= virtualRatio;
+
+        if (IsKeyPressed(KEY_S)) smoothOn = !smoothOn;
+        if (IsKeyPressed(KEY_O)) overscan = !overscan;
+
+        if (overscan)
+        {
+            destRec = (Rectangle) { -virtualRatio, -virtualRatio, screenWidth + (virtualRatio*2), screenHeight + (virtualRatio*2) };
+        }
+        else
+        {
+            destRec = (Rectangle) { (screenWidth - screenWidth/1.25f)/2.0f, (screenHeight - screenHeight/1.25f)/2.0f, screenWidth/1.25f, screenHeight/1.25f };
+        }
         //----------------------------------------------------------------------------------
 
         // Draw
@@ -101,14 +116,23 @@ int main(void)
         EndTextureMode();
 
         BeginDrawing();
-            ClearBackground(RED);
-
-            BeginMode2D(screenSpaceCamera);
+            ClearBackground(LIGHTGRAY);
+
+            if (smoothOn)
+            {
+                BeginMode2D(screenSpaceCamera);
+                   DrawTexturePro(target.texture, sourceRec, destRec, origin, 0.0f, WHITE);
+                EndMode2D();
+            }
+            else
+            {
                 DrawTexturePro(target.texture, sourceRec, destRec, origin, 0.0f, WHITE);
-            EndMode2D();
+            }
 
             DrawText(TextFormat("Screen resolution: %ix%i", screenWidth, screenHeight), 10, 10, 20, DARKBLUE);
             DrawText(TextFormat("World resolution: %ix%i", virtualScreenWidth, virtualScreenHeight), 10, 40, 20, DARKGREEN);
+            DrawText(TextFormat("Smooth: %s", (smoothOn ? "ON" : "OFF")), 10, screenHeight - 60, 20, RED);
+            DrawText(TextFormat("Overscan: %s", (overscan ? "ON" : "OFF")), 10, screenHeight - 30, 20, RED);
             DrawFPS(GetScreenWidth() - 95, 10);
         EndDrawing();
         //----------------------------------------------------------------------------------
@@ -122,4 +146,4 @@ int main(void)
     //--------------------------------------------------------------------------------------
 
     return 0;
-}
+}