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Fixed bug 4377 - SDL_PIXELFORMAT enum is anonymous, which prevents its use in a templated function 

zen3d

While trying to build Pixie lisp (https://github.com/pixie-lang/pixie), which uses SDL for multimedia output, the mandelbrot example won't build. The problem is that internally pixie uses a templated function to dump a value, and gcc chokes because SDL_PIXELFORMAT_RGA8888 is an anonymous enum.

I solved the problem locally by changing from:
   enum {
      SDL_PIXELFORMAT_UNKNOWN,
      ... etc. ...
      SDL_PIXELFORMAT_YUYV = ... etc ...
   };
to:
   typedef enum {
      SDL_PIXELFORMAT_UNKNOWN,
      ... etc. ...
      SDL_PIXELFORMAT_YUYV = ... etc ...
   } SDL_PIXELFORMAT_ENUM;
The net result of this change is that the enum containing SDL_PIXELFORMAT_* is no longer an anonymous enum and can now be used by a templated function.

This local change fixes Pixie lisp for me.

I did notice that you use the idiom
   typedef enum {
      ... etc ...
   } SDL_FOO;
elsewhere in your code, so that change to SDL_PIXELFORMAT doesn't look like it would have a negative impact.
This commit is contained in:
Sam Lantinga 2018-11-12 19:23:49 -08:00
parent b815ad56fc
commit 1a4c0d4e17
1 changed files with 2 additions and 2 deletions
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4
include/SDL_pixels.h
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@ -168,7 +168,7 @@ enum
((format) && (SDL_PIXELFLAG(format) != 1))
/* Note: If you modify this list, update SDL_GetPixelFormatName() */
enum
typedef enum
{
SDL_PIXELFORMAT_UNKNOWN,
SDL_PIXELFORMAT_INDEX1LSB =
@ -290,7 +290,7 @@ enum
SDL_DEFINE_PIXELFOURCC('N', 'V', '2', '1'),
SDL_PIXELFORMAT_EXTERNAL_OES = /**< Android video texture format */
SDL_DEFINE_PIXELFOURCC('O', 'E', 'S', ' ')
};
} SDL_PixelFormatEnum;
typedef struct SDL_Color
{