A few #defines to reduce SDL2 footprint.

Only applied when library is statically linked
libsdl-org · Jan 21, 2020 · 7df22cf · 7df22cf
1 parent 25c88ea
commit 7df22cf
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Showing 7 changed files with 75 additions and 13 deletions.
diff --git a/src/SDL_internal.h b/src/SDL_internal.h
@@ -51,6 +51,17 @@
 
 #include "SDL_config.h"
 
+/* A few #defines to reduce SDL2 footprint.
+   Only applied when library is statically linked */
+#define SDL_HAVE_BLIT_0                 1
+#define SDL_HAVE_BLIT_1                 1
+#define SDL_HAVE_BLIT_A                 1
+#define SDL_HAVE_BLIT_N                 1
+#define SDL_HAVE_BLIT_AUTO              1
+#define SDL_HAVE_RLE                    1
+#define SDL_VIDEO_RENDER_SW             1
+#define SDL_HAVE_YUV                    1
+
 #endif /* SDL_internal_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */
diff --git a/src/render/SDL_render.c b/src/render/SDL_render.c
@@ -105,7 +105,9 @@ static const SDL_RenderDriver *render_drivers[] = {
 #if SDL_VIDEO_RENDER_PSP
     &PSP_RenderDriver,
 #endif
+#if SDL_VIDEO_RENDER_SW
     &SW_RenderDriver
+#endif
 };
 #endif /* !SDL_RENDER_DISABLED */
 
@@ -907,7 +909,7 @@ SDL_CreateRenderer(SDL_Window * window, int index, Uint32 flags)
 SDL_Renderer *
 SDL_CreateSoftwareRenderer(SDL_Surface * surface)
 {
-#if !SDL_RENDER_DISABLED
+#if !SDL_RENDER_DISABLED && SDL_VIDEO_RENDER_SW
     SDL_Renderer *renderer;
 
     renderer = SW_CreateRendererForSurface(surface);
@@ -1114,7 +1116,11 @@ SDL_CreateTexture(SDL_Renderer * renderer, Uint32 format, int access, int w, int
         renderer->textures = texture;
 
         if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
+#if SDL_HAVE_YUV
             texture->yuv = SDL_SW_CreateYUVTexture(format, w, h);
+#else
+            SDL_SetError("SDL not built with YUV support");
+#endif
             if (!texture->yuv) {
                 SDL_DestroyTexture(texture);
                 return NULL;
@@ -1532,8 +1538,10 @@ SDL_UpdateTexture(SDL_Texture * texture, const SDL_Rect * rect,
 
     if ((rect->w == 0) || (rect->h == 0)) {
         return 0;  /* nothing to do. */
+#if SDL_HAVE_YUV
     } else if (texture->yuv) {
         return SDL_UpdateTextureYUV(texture, rect, pixels, pitch);
+#endif
     } else if (texture->native) {
         return SDL_UpdateTextureNative(texture, rect, pixels, pitch);
     } else {
@@ -1602,6 +1610,7 @@ int SDL_UpdateYUVTexture(SDL_Texture * texture, const SDL_Rect * rect,
                          const Uint8 *Uplane, int Upitch,
                          const Uint8 *Vplane, int Vpitch)
 {
+#if SDL_HAVE_YUV
     SDL_Renderer *renderer;
     SDL_Rect full_rect;
 
@@ -1658,6 +1667,9 @@ int SDL_UpdateYUVTexture(SDL_Texture * texture, const SDL_Rect * rect,
             return SDL_Unsupported();
         }
     }
+#else
+    return -1;
+#endif
 }
 
 static int
@@ -1699,12 +1711,15 @@ SDL_LockTexture(SDL_Texture * texture, const SDL_Rect * rect,
         rect = &full_rect;
     }
 
+#if SDL_HAVE_YUV
     if (texture->yuv) {
         if (FlushRenderCommandsIfTextureNeeded(texture) < 0) {
             return -1;
         }
         return SDL_LockTextureYUV(texture, rect, pixels, pitch);
-    } else if (texture->native) {
+    } else
+#endif
+    if (texture->native) {
         /* Calls a real SDL_LockTexture/SDL_UnlockTexture on unlock, flushing then. */
         return SDL_LockTextureNative(texture, rect, pixels, pitch);
     } else {
@@ -1802,9 +1817,12 @@ SDL_UnlockTexture(SDL_Texture * texture)
     if (texture->access != SDL_TEXTUREACCESS_STREAMING) {
         return;
     }
+#if SDL_HAVE_YUV
     if (texture->yuv) {
         SDL_UnlockTextureYUV(texture);
-    } else if (texture->native) {
+    } else
+#endif
+    if (texture->native) {
         SDL_UnlockTextureNative(texture);
     } else {
         SDL_Renderer *renderer = texture->renderer;
@@ -3159,9 +3177,11 @@ SDL_DestroyTexture(SDL_Texture * texture)
     if (texture->native) {
         SDL_DestroyTexture(texture->native);
     }
+#if SDL_HAVE_YUV
     if (texture->yuv) {
         SDL_SW_DestroyYUVTexture(texture->yuv);
     }
+#endif
     SDL_free(texture->pixels);
 
     renderer->DestroyTexture(renderer, texture);

diff --git a/src/video/SDL_RLEaccel.c b/src/video/SDL_RLEaccel.c
@@ -445,7 +445,7 @@ RLEClipBlit(int w, Uint8 * srcbuf, SDL_Surface * surf_dst,
 
 
 /* blit a colorkeyed RLE surface */
-int SDLCALL
+static int SDLCALL
 SDL_RLEBlit(SDL_Surface * surf_src, SDL_Rect * srcrect,
             SDL_Surface * surf_dst, SDL_Rect * dstrect)
 {
@@ -723,7 +723,7 @@ RLEAlphaClipBlit(int w, Uint8 * srcbuf, SDL_Surface * surf_dst,
 }
 
 /* blit a pixel-alpha RLE surface */
-int SDLCALL
+static int SDLCALL
 SDL_RLEAlphaBlit(SDL_Surface * surf_src, SDL_Rect * srcrect,
                  SDL_Surface * surf_dst, SDL_Rect * dstrect)
 {

diff --git a/src/video/SDL_RLEaccel_c.h b/src/video/SDL_RLEaccel_c.h
@@ -27,10 +27,6 @@
 /* Useful functions and variables from SDL_RLEaccel.c */
 
 extern int SDL_RLESurface(SDL_Surface * surface);
-extern int SDLCALL SDL_RLEBlit     (SDL_Surface * src, SDL_Rect * srcrect,
-                                    SDL_Surface * dst, SDL_Rect * dstrect);
-extern int SDLCALL SDL_RLEAlphaBlit(SDL_Surface * src, SDL_Rect * srcrect,
-                                    SDL_Surface * dst, SDL_Rect * dstrect);
 extern void SDL_UnRLESurface(SDL_Surface * surface, int recode);
 
 #endif /* SDL_RLEaccel_c_h_ */

diff --git a/src/video/SDL_blit.c b/src/video/SDL_blit.c
@@ -202,22 +202,27 @@ SDL_CalculateBlit(SDL_Surface * surface)
         return SDL_SetError("Blit combination not supported");
     }
 
+#if SDL_HAVE_RLE
     /* Clean everything out to start */
     if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) {
         SDL_UnRLESurface(surface, 1);
     }
+#endif
+
     map->blit = SDL_SoftBlit;
     map->info.src_fmt = surface->format;
     map->info.src_pitch = surface->pitch;
     map->info.dst_fmt = dst->format;
     map->info.dst_pitch = dst->pitch;
 
+#if SDL_HAVE_RLE
     /* See if we can do RLE acceleration */
     if (map->info.flags & SDL_COPY_RLE_DESIRED) {
         if (SDL_RLESurface(surface) == 0) {
             return 0;
         }
     }
+#endif
 
     /* Choose a standard blit function */
     if (map->identity && !(map->info.flags & ~SDL_COPY_RLE_DESIRED)) {
@@ -226,17 +231,30 @@ SDL_CalculateBlit(SDL_Surface * surface)
         /* Greater than 8 bits per channel not supported yet */
         SDL_InvalidateMap(map);
         return SDL_SetError("Blit combination not supported");
-    } else if (surface->format->BitsPerPixel < 8 &&
+    }
+#if SDL_HAVE_BLIT_0
+    else if (surface->format->BitsPerPixel < 8 &&
                SDL_ISPIXELFORMAT_INDEXED(surface->format->format)) {
         blit = SDL_CalculateBlit0(surface);
-    } else if (surface->format->BytesPerPixel == 1 &&
+    }
+#endif
+#if SDL_HAVE_BLIT_1
+    else if (surface->format->BytesPerPixel == 1 &&
                SDL_ISPIXELFORMAT_INDEXED(surface->format->format)) {
         blit = SDL_CalculateBlit1(surface);
-    } else if (map->info.flags & SDL_COPY_BLEND) {
+    }
+#endif
+#if SDL_HAVE_BLIT_A
+    else if (map->info.flags & SDL_COPY_BLEND) {
         blit = SDL_CalculateBlitA(surface);
-    } else {
+    }
+#endif
+#if SDL_HAVE_BLIT_N
+    else {
         blit = SDL_CalculateBlitN(surface);
     }
+#endif
+#if SDL_HAVE_BLIT_AUTO
     if (blit == NULL) {
         Uint32 src_format = surface->format->format;
         Uint32 dst_format = dst->format->format;
@@ -245,6 +263,8 @@ SDL_CalculateBlit(SDL_Surface * surface)
             SDL_ChooseBlitFunc(src_format, dst_format, map->info.flags,
                                SDL_GeneratedBlitFuncTable);
     }
+#endif
+
 #ifndef TEST_SLOW_BLIT
     if (blit == NULL)
 #endif

diff --git a/src/video/SDL_pixels.c b/src/video/SDL_pixels.c
@@ -1003,9 +1003,11 @@ SDL_MapSurface(SDL_Surface * src, SDL_Surface * dst)
 
     /* Clear out any previous mapping */
     map = src->map;
+#if SDL_HAVE_RLE
     if ((src->flags & SDL_RLEACCEL) == SDL_RLEACCEL) {
         SDL_UnRLESurface(src, 1);
     }
+#endif
     SDL_InvalidateMap(map);
 
     /* Figure out what kind of mapping we're doing */

diff --git a/src/video/SDL_surface.c b/src/video/SDL_surface.c
@@ -905,11 +905,13 @@ int
 SDL_LockSurface(SDL_Surface * surface)
 {
     if (!surface->locked) {
+#if SDL_HAVE_RLE
         /* Perform the lock */
         if (surface->flags & SDL_RLEACCEL) {
             SDL_UnRLESurface(surface, 1);
             surface->flags |= SDL_RLEACCEL;     /* save accel'd state */
         }
+#endif
     }
 
     /* Increment the surface lock count, for recursive locks */
@@ -930,11 +932,13 @@ SDL_UnlockSurface(SDL_Surface * surface)
         return;
     }
 
+#if SDL_HAVE_RLE
     /* Update RLE encoded surface with new data */
     if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) {
         surface->flags &= ~SDL_RLEACCEL;        /* stop lying */
         SDL_RLESurface(surface);
     }
+#endif
 }
 
 /*
@@ -1210,13 +1214,20 @@ int SDL_ConvertPixels(int width, int height,
         return SDL_InvalidParamError("dst_pitch");
     }
 
+#if SDL_HAVE_YUV
     if (SDL_ISPIXELFORMAT_FOURCC(src_format) && SDL_ISPIXELFORMAT_FOURCC(dst_format)) {
         return SDL_ConvertPixels_YUV_to_YUV(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
     } else if (SDL_ISPIXELFORMAT_FOURCC(src_format)) {
         return SDL_ConvertPixels_YUV_to_RGB(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
     } else if (SDL_ISPIXELFORMAT_FOURCC(dst_format)) {
         return SDL_ConvertPixels_RGB_to_YUV(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
     }
+#else
+    if (SDL_ISPIXELFORMAT_FOURCC(src_format) || SDL_ISPIXELFORMAT_FOURCC(dst_format)) {
+        SDL_SetError("SDL not built with YUV support");
+        return -1;
+    }
+#endif
 
     /* Fast path for same format copy */
     if (src_format == dst_format) {
@@ -1269,9 +1280,11 @@ SDL_FreeSurface(SDL_Surface * surface)
     while (surface->locked > 0) {
         SDL_UnlockSurface(surface);
     }
+#if SDL_HAVE_RLE
     if (surface->flags & SDL_RLEACCEL) {
         SDL_UnRLESurface(surface, 0);
     }
+#endif
     if (surface->format) {
         SDL_SetSurfacePalette(surface, NULL);
         SDL_FreeFormat(surface->format);