Add the SaveImageAs function

src/raylib.h

@@ -835,7 +835,7 @@ RLAPI bool CheckCollisionPointTriangle(Vector2 point, Vector2 p1, Vector2 p2, Ve
 // Texture Loading and Drawing Functions (Module: textures)
 //------------------------------------------------------------------------------------
 
-// Image/Texture2D data loading/unloading functions
+// Image/Texture2D data loading/unloading/saving functions
 RLAPI Image LoadImage(const char *fileName);                                                             // Load image from file into CPU memory (RAM)
 RLAPI Image LoadImageEx(Color *pixels, int width, int height);                                           // Load image from Color array data (RGBA - 32bit)
 RLAPI Image LoadImagePro(void *data, int width, int height, int format);                                 // Load image from raw data with parameters
@@ -849,6 +849,7 @@ RLAPI void UnloadRenderTexture(RenderTexture2D target);
 RLAPI Color *GetImageData(Image image);                                                                  // Get pixel data from image as a Color struct array
 RLAPI Image GetTextureData(Texture2D texture);                                                           // Get pixel data from GPU texture and return an Image
 RLAPI void UpdateTexture(Texture2D texture, const void *pixels);                                         // Update GPU texture with new data
+RLAPI void SaveImageAs(Image image, const char *fileName);                                               // Save image to a PNG file
 
 // Image manipulation functions
 RLAPI void ImageToPOT(Image *image, Color fillColor);                                                    // Convert image to POT (power-of-two)

src/textures.c

@@ -553,6 +553,18 @@ void UpdateTexture(Texture2D texture, const void *pixels)
     rlglUpdateTexture(texture.id, texture.width, texture.height, texture.format, pixels);
 }
 
+// Save image to a PNG file
+void SaveImageAs(Image image, const char *fileName)
+{
+#if defined(PLATFORM_DESKTOP) || defined(PLATFORM_RPI)
+    unsigned char* imgData = (unsigned char*)GetImageData(image); // this works since Color is just a container for the RGBA values
+    SavePNG(fileName, imgData, image.width, image.height, 4);
+    free(imgData);
+
+    TraceLog(INFO, "Image saved: %s", fileName);
+#endif
+}
+
 // Convert image data to desired format
 void ImageFormat(Image *image, int newFormat)
 {