ZImage::Reload

include/ZE_ZImage.h

@@ -13,7 +13,7 @@
 File: ZE_ZImage.h <br>
 Description: Header file for core ZEngine Image and Texture Object. <br>
 Author(s): James Turk, Gamer Tazar <br>
-$Id: ZE_ZImage.h,v 1.4 2002/12/02 05:18:52 cozman Exp $<br>
+$Id: ZE_ZImage.h,v 1.5 2002/12/27 18:56:17 cozman Exp $<br>
 
     \file ZE_ZImage.h
     \brief Definition file for ZImage.
@@ -132,6 +132,13 @@ class ZImage : public ZObject
         **/
         void Attach(SDL_Surface *surface);
 
+        /*
+            \brief Reattach a preloaded texture that has been lost.
+
+            Attach loaded textures which have been lost due to loss of focus, should be called when ZEngine::ImagesNeedReload is true.
+        **/
+        void Reload();
+
         /*!
             \brief Releases image.
 
@@ -214,7 +221,7 @@ class ZImage : public ZObject
         /*!
             \brief Check if file is loaded.
 
-            Check if file is loaded and pointer to data is non-NULL.
+            Check if surface is a valid GL texture. (does not detect surface loss)
             \return Loaded or Unloaded state of data.
         **/
         bool IsLoaded();

src/ZE_ZImage.cpp

@@ -13,7 +13,7 @@
 File: ZE_ZImage.cpp <br>
 Description: Implementation source file for core ZEngine Image or Texture Object. <br>
 Author(s): James Turk, Gamer Tazar <br>
-$Id: ZE_ZImage.cpp,v 1.8 2002/12/22 04:31:15 cozman Exp $<br>
+$Id: ZE_ZImage.cpp,v 1.9 2002/12/27 18:56:17 cozman Exp $<br>
 
     \file ZE_ZImage.cpp
     \brief Source file for ZImage.
@@ -112,6 +112,13 @@ void ZImage::Attach(SDL_Surface *surface)
         LogError("Invalid surface passed to ZImage::Attach.");
 }
 
+void ZImage::Reload()
+{
+    SDL_Surface *temp = rImage;
+    rImage = NULL;
+    Attach(temp);
+}
+
 void ZImage::Release()
 {
     if(glIsTexture(rTexID))

test/ZImageTest.cpp

@@ -41,11 +41,18 @@ void Test()
     ZImage image1, image2, image3, textImage;
     ZFont font("data/almontew.ttf",30);
 
-    engine->SetReloadNeed(true);    //start off needing the reload
-
     font.SetColor(0,255,0);
     font.SetBGColor(0,0,255);
 
+    temp = SDL_LoadBMP("data/test02.bmp");    //this is a separate surface
+    image1.Attach(temp);    //this attaches the surface into itself
+    image2.Open("data/test01.bmp");
+    image3.OpenFromImage(image2.Surface(),5,5,20,20);
+    temp = NULL;    //and temp will now be controlled and freed by image1
+    image1.SetColorKey(255,0,255);
+    image2.SetColorKey(255,0,255);
+    font.DrawShadedText("ZImage Test.",textImage);
+
     do
     {
         //In the active loop, check events first//
@@ -53,14 +60,10 @@ void Test()
 
         if(engine->ImagesNeedReload())
         {
-            temp = SDL_LoadBMP("data/test02.bmp");    //this is a separate surface
+            image1.Reload();
-            image1.Attach(temp);    //this attaches the surface into itself
+            image2.Reload();
-            image2.Open("data/test01.bmp");
+            image3.Reload();
-            image3.OpenFromImage(image2.Surface(),5,5,20,20);
+            textImage.Reload();
-            temp = NULL;    //and temp will now be controlled and freed by image1
-            image1.SetColorKey(255,0,255);
-            image2.SetColorKey(255,0,255);
-            font.DrawShadedText("ZImage Test.",textImage);
             engine->SetReloadNeed(false);   //very important for speed, without this you'd be reloading every frame
         }