Added comments

imgui.cpp

@@ -89,8 +89,8 @@
 
         // Load texture
         unsigned char* pixels;
-        int width, height;
-        io.Fonts->GetTexDataAsRGBA32(pixels, &width, &height);
+        int width, height, bytes_per_pixels;
+        io.Fonts->GetTexDataAsRGBA32(pixels, &width, &height, &bytes_per_pixels);
         // TODO: copy texture to graphics memory. 
         // TODO: store your texture pointer/identifier in 'io.Fonts->TexID'
 

imgui.h

@@ -773,6 +773,7 @@ struct ImFontAtlas
     // User is in charge of copying the pixels into graphics memory, then call SetTextureUserID()
     // After loading the texture into your graphic system, store your texture handle in 'TexID' (ignore if you aren't using multiple fonts nor images)
     // RGBA32 format is provided for convenience and high compatibility, but note that all RGB pixels are white, so 75% of the memory is wasted.
+    // Pitch = Width * BytesPerPixels
     IMGUI_API void              GetTexDataAsAlpha8(unsigned char** out_pixels, int* out_width, int* out_height, int* out_bytes_per_pixel = NULL);  // 1 byte per-pixel
     IMGUI_API void              GetTexDataAsRGBA32(unsigned char** out_pixels, int* out_width, int* out_height, int* out_bytes_per_pixel = NULL);  // 4 bytes-per-pixel
     IMGUI_API void              SetTexID(void* id)  { TexID = id; }