REVIEWED: example: Replaced GetImageData()

examples/textures/textures_image_processing.c

@@ -4,7 +4,7 @@
 *
 *   NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM)
 *
-*   This example has been created using raylib 1.4 (www.raylib.com)
+*   This example has been created using raylib 3.5 (www.raylib.com)
 *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
 *
 *   Copyright (c) 2016 Ramon Santamaria (@raysan5)
@@ -50,9 +50,11 @@ int main(void)
 
     // NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
 
-    Image image = LoadImage("resources/parrots.png");   // Loaded in CPU memory (RAM)
-    ImageFormat(&image, UNCOMPRESSED_R8G8B8A8);         // Format image to RGBA 32bit (required for texture update) <-- ISSUE
-    Texture2D texture = LoadTextureFromImage(image);    // Image converted to texture, GPU memory (VRAM)
+    Image imOrigin = LoadImage("resources/parrots.png");   // Loaded in CPU memory (RAM)
+    ImageFormat(&imOrigin, UNCOMPRESSED_R8G8B8A8);         // Format image to RGBA 32bit (required for texture update) <-- ISSUE
+    Texture2D texture = LoadTextureFromImage(imOrigin);    // Image converted to texture, GPU memory (VRAM)
+    
+    Image imCopy = ImageCopy(imOrigin);
 
     int currentProcess = NONE;
     bool textureReload = false;
@@ -92,7 +94,7 @@ int main(void)
         if (IsKeyPressed(KEY_DOWN))
         {
             currentProcess++;
-            if (currentProcess > 7) currentProcess = 0;
+            if (currentProcess > (NUM_PROCESSES - 1)) currentProcess = 0;
             textureReload = true;
         }
         else if (IsKeyPressed(KEY_UP))
@@ -105,27 +107,27 @@ int main(void)
         // Reload texture when required
         if (textureReload)
         {
-            UnloadImage(image);                         // Unload current image data
-            image = LoadImage("resources/parrots.png"); // Re-load image data
-
+            UnloadImage(imCopy);                // Unload image-copy data
+            imCopy = ImageCopy(imOrigin);     // Restore image-copy from image-origin
+            
             // NOTE: Image processing is a costly CPU process to be done every frame,
             // If image processing is required in a frame-basis, it should be done
             // with a texture and by shaders
             switch (currentProcess)
             {
-                case COLOR_GRAYSCALE: ImageColorGrayscale(&image); break;
-                case COLOR_TINT: ImageColorTint(&image, GREEN); break;
-                case COLOR_INVERT: ImageColorInvert(&image); break;
-                case COLOR_CONTRAST: ImageColorContrast(&image, -40); break;
-                case COLOR_BRIGHTNESS: ImageColorBrightness(&image, -80); break;
-                case FLIP_VERTICAL: ImageFlipVertical(&image); break;
-                case FLIP_HORIZONTAL: ImageFlipHorizontal(&image); break;
+                case COLOR_GRAYSCALE: ImageColorGrayscale(&imCopy); break;
+                case COLOR_TINT: ImageColorTint(&imCopy, GREEN); break;
+                case COLOR_INVERT: ImageColorInvert(&imCopy); break;
+                case COLOR_CONTRAST: ImageColorContrast(&imCopy, -40); break;
+                case COLOR_BRIGHTNESS: ImageColorBrightness(&imCopy, -80); break;
+                case FLIP_VERTICAL: ImageFlipVertical(&imCopy); break;
+                case FLIP_HORIZONTAL: ImageFlipHorizontal(&imCopy); break;
                 default: break;
             }
 
-            Color *pixels = GetImageData(image);        // Get pixel data from image (RGBA 32bit)
+            Color *pixels = LoadImageColors(imCopy);    // Load pixel data from image (RGBA 32bit)
             UpdateTexture(texture, pixels);             // Update texture with new image data
-            free(pixels);                               // Unload pixels data from RAM
+            UnloadImageColors(pixels);                  // Unload pixels data from RAM
 
             textureReload = false;
         }
@@ -157,7 +159,8 @@ int main(void)
     // De-Initialization
     //--------------------------------------------------------------------------------------
     UnloadTexture(texture);       // Unload texture from VRAM
-    UnloadImage(image);           // Unload image from RAM
+    UnloadImage(imOrigin);        // Unload image-origin from RAM
+    UnloadImage(imCopy);          // Unload image-copy from RAM
 
     CloseWindow();                // Close window and OpenGL context
     //--------------------------------------------------------------------------------------