Added a single SDL_LEAN_AND_MEAN define to turn on minimal SDL builds

Protected more code with #ifdefs to reduce the size of minimal shared library builds

src/SDL_internal.h

@@ -54,46 +54,67 @@
 /* A few #defines to reduce SDL2 footprint.
    Only effective when library is statically linked.
    You have to manually edit this file. */
+#ifndef SDL_LEAN_AND_MEAN
+#define SDL_LEAN_AND_MEAN               1
+#endif
 
 /* Optimized functions from 'SDL_blit_0.c'
    - blit with source BitsPerPixel < 8, palette */
-#define SDL_HAVE_BLIT_0                 1
+#ifndef SDL_HAVE_BLIT_0
+#define SDL_HAVE_BLIT_0                 !SDL_LEAN_AND_MEAN
+#endif
 
 /* Optimized functions from 'SDL_blit_1.c'
    - blit with source BytesPerPixel == 1, palette */
-#define SDL_HAVE_BLIT_1                 1
+#ifndef SDL_HAVE_BLIT_1
+#define SDL_HAVE_BLIT_1                 !SDL_LEAN_AND_MEAN
+#endif
 
 /* Optimized functions from 'SDL_blit_A.c'
    - blit with 'SDL_BLENDMODE_BLEND' blending mode */
-#define SDL_HAVE_BLIT_A                 1
+#ifndef SDL_HAVE_BLIT_A
+#define SDL_HAVE_BLIT_A                 !SDL_LEAN_AND_MEAN
+#endif
 
 /* Optimized functions from 'SDL_blit_N.c'
    - blit with COLORKEY mode, or nothing */
-#define SDL_HAVE_BLIT_N                 1
+#ifndef SDL_HAVE_BLIT_N
+#define SDL_HAVE_BLIT_N                 !SDL_LEAN_AND_MEAN
+#endif
 
 /* Optimized functions from 'SDL_blit_N.c'
    - RGB565 conversion with Lookup tables */
-#define SDL_HAVE_BLIT_N_RGB565          1
+#ifndef SDL_HAVE_BLIT_N_RGB565
+#define SDL_HAVE_BLIT_N_RGB565          !SDL_LEAN_AND_MEAN
+#endif
 
 /* Optimized functions from 'SDL_blit_AUTO.c'
    - blit with modulate color, modulate alpha, any blending mode
    - scaling or not */
-#define SDL_HAVE_BLIT_AUTO              1
+#ifndef SDL_HAVE_BLIT_AUTO
+#define SDL_HAVE_BLIT_AUTO              !SDL_LEAN_AND_MEAN
+#endif
 
 /* Run-Length-Encoding
    - SDL_SetColorKey() called with SDL_RLEACCEL flag */
-#define SDL_HAVE_RLE                    1
+#ifndef SDL_HAVE_RLE
+#define SDL_HAVE_RLE                    !SDL_LEAN_AND_MEAN
+#endif
 
 /* Software SDL_Renderer
    - creation of software renderer
    - *not* general blitting functions
    - {blend,draw}{fillrect,line,point} internal functions */
-#define SDL_VIDEO_RENDER_SW             1
+#ifndef SDL_VIDEO_RENDER_SW
+#define SDL_VIDEO_RENDER_SW             !SDL_LEAN_AND_MEAN
+#endif
 
 /* YUV formats
    - handling of YUV surfaces
    - blitting and conversion functions */
-#define SDL_HAVE_YUV                    1
+#ifndef SDL_HAVE_YUV
+#define SDL_HAVE_YUV                    !SDL_LEAN_AND_MEAN
+#endif
 
 #endif /* SDL_internal_h_ */