Made it possible to disable the rendering subsystem with configure --disable-render

configure.in

@@ -362,6 +362,12 @@ AC_HELP_STRING([--enable-video], [Enable the video subsystem [[default=yes]]]),
 if test x$enable_video != xyes; then
     AC_DEFINE(SDL_VIDEO_DISABLED)
 fi
+AC_ARG_ENABLE(render,
+AC_HELP_STRING([--enable-render], [Enable the render subsystem [[default=yes]]]),
+              , enable_render=yes)
+if test x$enable_render != xyes; then
+    AC_DEFINE(SDL_RENDER_DISABLED)
+fi
 AC_ARG_ENABLE(events,
 AC_HELP_STRING([--enable-events], [Enable the events subsystem [[default=yes]]]),
               , enable_events=yes)

include/SDL_config.h.in

@@ -179,6 +179,7 @@
 #undef SDL_JOYSTICK_DISABLED
 #undef SDL_HAPTIC_DISABLED
 #undef SDL_LOADSO_DISABLED
+#undef SDL_RENDER_DISABLED
 #undef SDL_THREADS_DISABLED
 #undef SDL_TIMERS_DISABLED
 #undef SDL_VIDEO_DISABLED

src/render/SDL_render.c

@@ -45,6 +45,7 @@
 
 
 static const SDL_RenderDriver *render_drivers[] = {
+#if !SDL_RENDER_DISABLED
 #if SDL_VIDEO_RENDER_D3D
     &D3D_RenderDriver,
 #endif
@@ -61,6 +62,7 @@ static const SDL_RenderDriver *render_drivers[] = {
     &DirectFB_RenderDriver,
 #endif
     &SW_RenderDriver
+#endif /* !SDL_RENDER_DISABLED */
 };
 static char renderer_magic;
 static char texture_magic;
@@ -170,7 +172,12 @@ SDL_CreateRenderer(SDL_Window * window, int index, Uint32 flags)
 SDL_Renderer *
 SDL_CreateSoftwareRenderer(SDL_Surface * surface)
 {
+#if !SDL_RENDER_DISABLED
     return SW_CreateRendererForSurface(surface);
+#else
+    SDL_SetError("SDL not built with rendering support");
+    return NULL;
+#endif /* !SDL_RENDER_DISABLED */
 }
 
 int

src/render/SDL_sysrender.h

@@ -119,6 +119,8 @@ struct SDL_RenderDriver
     SDL_RendererInfo info;
 };
 
+#if !SDL_RENDER_DISABLED
+
 #if SDL_VIDEO_RENDER_D3D
 extern SDL_RenderDriver D3D_RenderDriver;
 #endif
@@ -136,6 +138,8 @@ extern SDL_RenderDriver DirectFB_RenderDriver;
 #endif
 extern SDL_RenderDriver SW_RenderDriver;
 
+#endif /* !SDL_RENDER_DISABLED */
+
 #endif /* _SDL_sysrender_h */
 
 /* vi: set ts=4 sw=4 expandtab: */

src/render/direct3d/SDL_render_d3d.c

@@ -21,7 +21,8 @@
 */
 #include "SDL_config.h"
 
-#if SDL_VIDEO_RENDER_D3D
+#if SDL_VIDEO_RENDER_D3D && !SDL_RENDER_DISABLED
+
 
 #include "../../core/windows/SDL_windows.h"
 
@@ -1066,6 +1067,6 @@ D3D_DestroyRenderer(SDL_Renderer * renderer)
     SDL_free(renderer);
 }
 
-#endif /* SDL_VIDEO_RENDER_D3D */
+#endif /* SDL_VIDEO_RENDER_D3D && !SDL_RENDER_DISABLED */
 
 /* vi: set ts=4 sw=4 expandtab: */

src/render/opengl/SDL_render_gl.c

@@ -21,7 +21,7 @@
 */
 #include "SDL_config.h"
 
-#if SDL_VIDEO_RENDER_OGL
+#if SDL_VIDEO_RENDER_OGL && !SDL_RENDER_DISABLED
 
 #include "SDL_opengl.h"
 #include "../SDL_sysrender.h"
@@ -841,6 +841,6 @@ GL_DestroyRenderer(SDL_Renderer * renderer)
     SDL_free(renderer);
 }
 
-#endif /* SDL_VIDEO_RENDER_OGL */
+#endif /* SDL_VIDEO_RENDER_OGL && !SDL_RENDER_DISABLED */
 
 /* vi: set ts=4 sw=4 expandtab: */

src/render/opengles/SDL_render_gles.c

@@ -21,7 +21,7 @@
 */
 #include "SDL_config.h"
 
-#if SDL_VIDEO_RENDER_OGL_ES
+#if SDL_VIDEO_RENDER_OGL_ES && !SDL_RENDER_DISABLED
 
 #include "SDL_opengles.h"
 #include "../SDL_sysrender.h"
@@ -728,6 +728,6 @@ GLES_DestroyRenderer(SDL_Renderer * renderer)
     SDL_free(renderer);
 }
 
-#endif /* SDL_VIDEO_RENDER_OGL_ES */
+#endif /* SDL_VIDEO_RENDER_OGL_ES && !SDL_RENDER_DISABLED */
 
 /* vi: set ts=4 sw=4 expandtab: */

src/render/opengles2/SDL_render_gles2.c

@@ -23,7 +23,7 @@
 
 #include "SDL_config.h"
 
-#if SDL_VIDEO_RENDER_OGL_ES2
+#if SDL_VIDEO_RENDER_OGL_ES2 && !SDL_RENDER_DISABLED
 
 #include "SDL_opengles2.h"
 #include "../SDL_sysrender.h"
@@ -1201,6 +1201,6 @@ GLES2_CreateRenderer(SDL_Window *window, Uint32 flags)
     return renderer;
 }
 
-#endif /* SDL_VIDEO_RENDER_OGL_ES2 */
+#endif /* SDL_VIDEO_RENDER_OGL_ES2 && !SDL_RENDER_DISABLED */
 
 /* vi: set ts=4 sw=4 expandtab: */

src/render/opengles2/SDL_shaders_gles2.c

@@ -23,7 +23,7 @@
 
 #include "SDL_config.h"
 
-#if SDL_VIDEO_RENDER_OGL_ES2
+#if SDL_VIDEO_RENDER_OGL_ES2 && !SDL_RENDER_DISABLED
 
 #include "SDL_video.h"
 #include "SDL_opengles2.h"
@@ -539,6 +539,6 @@ const GLES2_Shader *GLES2_GetShader(GLES2_ShaderType type, SDL_BlendMode blendMo
     }
 }
 
-#endif /* SDL_VIDEO_RENDER_OGL_ES2 */
+#endif /* SDL_VIDEO_RENDER_OGL_ES2 && !SDL_RENDER_DISABLED */
 
 /* vi: set ts=4 sw=4 expandtab: */

src/render/software/SDL_blendfillrect.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#if !SDL_RENDER_DISABLED
+
 #include "SDL_draw.h"
 #include "SDL_blendfillrect.h"
 
@@ -345,4 +347,6 @@ SDL_BlendFillRects(SDL_Surface * dst, const SDL_Rect ** rects, int count,
     return status;
 }
 
+#endif /* !SDL_RENDER_DISABLED */
+
 /* vi: set ts=4 sw=4 expandtab: */

src/render/software/SDL_blendline.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#if !SDL_RENDER_DISABLED
+
 #include "SDL_draw.h"
 #include "SDL_blendline.h"
 #include "SDL_blendpoint.h"
@@ -779,4 +781,6 @@ SDL_BlendLines(SDL_Surface * dst, const SDL_Point * points, int count,
     return 0;
 }
 
+#endif /* !SDL_RENDER_DISABLED */
+
 /* vi: set ts=4 sw=4 expandtab: */

src/render/software/SDL_blendpoint.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#if !SDL_RENDER_DISABLED
+
 #include "SDL_draw.h"
 #include "SDL_blendpoint.h"
 
@@ -343,4 +345,6 @@ SDL_BlendPoints(SDL_Surface * dst, const SDL_Point * points, int count,
     return status;
 }
 
+#endif /* !SDL_RENDER_DISABLED */
+
 /* vi: set ts=4 sw=4 expandtab: */

src/render/software/SDL_drawline.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#if !SDL_RENDER_DISABLED
+
 #include "SDL_draw.h"
 #include "SDL_drawline.h"
 #include "SDL_drawpoint.h"
@@ -208,4 +210,6 @@ SDL_DrawLines(SDL_Surface * dst, const SDL_Point * points, int count,
     return 0;
 }
 
+#endif /* !SDL_RENDER_DISABLED */
+
 /* vi: set ts=4 sw=4 expandtab: */

src/render/software/SDL_drawpoint.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#if !SDL_RENDER_DISABLED
+
 #include "SDL_draw.h"
 #include "SDL_drawpoint.h"
 
@@ -114,4 +116,6 @@ SDL_DrawPoints(SDL_Surface * dst, const SDL_Point * points, int count,
     return 0;
 }
 
+#endif /* !SDL_RENDER_DISABLED */
+
 /* vi: set ts=4 sw=4 expandtab: */

src/render/software/SDL_render_sw.c

@@ -21,6 +21,8 @@
 */
 #include "SDL_config.h"
 
+#if !SDL_RENDER_DISABLED
+
 #include "../SDL_sysrender.h"
 #include "../../video/SDL_pixels_c.h"
 
@@ -428,4 +430,6 @@ SW_DestroyRenderer(SDL_Renderer * renderer)
     SDL_free(renderer);
 }
 
+#endif /* !SDL_RENDER_DISABLED */
+
 /* vi: set ts=4 sw=4 expandtab: */