From b0d2e83910f24019530116846a3df489742fc1dd Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Tue, 8 Feb 2011 10:04:09 -0800
Subject: [PATCH] Made it possible to disable the rendering subsystem with
 configure --disable-render

---
 configure.in                             | 6 ++++++
 include/SDL_config.h.in                  | 1 +
 src/render/SDL_render.c                  | 7 +++++++
 src/render/SDL_sysrender.h               | 4 ++++
 src/render/direct3d/SDL_render_d3d.c     | 5 +++--
 src/render/opengl/SDL_render_gl.c        | 4 ++--
 src/render/opengles/SDL_render_gles.c    | 4 ++--
 src/render/opengles2/SDL_render_gles2.c  | 4 ++--
 src/render/opengles2/SDL_shaders_gles2.c | 4 ++--
 src/render/software/SDL_blendfillrect.c  | 4 ++++
 src/render/software/SDL_blendline.c      | 4 ++++
 src/render/software/SDL_blendpoint.c     | 4 ++++
 src/render/software/SDL_drawline.c       | 4 ++++
 src/render/software/SDL_drawpoint.c      | 4 ++++
 src/render/software/SDL_render_sw.c      | 4 ++++
 15 files changed, 53 insertions(+), 10 deletions(-)

diff --git a/configure.in b/configure.in
index 252f15f46..454c3db8a 100644
--- a/configure.in
+++ b/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)
diff --git a/include/SDL_config.h.in b/include/SDL_config.h.in
index 551ceb6ad..a9526f694 100644
--- a/include/SDL_config.h.in
+++ b/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
diff --git a/src/render/SDL_render.c b/src/render/SDL_render.c
index 34647c195..fdee3a49d 100644
--- a/src/render/SDL_render.c
+++ b/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
diff --git a/src/render/SDL_sysrender.h b/src/render/SDL_sysrender.h
index b2d6d3846..b73babc04 100644
--- a/src/render/SDL_sysrender.h
+++ b/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: */
diff --git a/src/render/direct3d/SDL_render_d3d.c b/src/render/direct3d/SDL_render_d3d.c
index b3409c496..89aa43b93 100644
--- a/src/render/direct3d/SDL_render_d3d.c
+++ b/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: */
diff --git a/src/render/opengl/SDL_render_gl.c b/src/render/opengl/SDL_render_gl.c
index eeac93e11..30b0049a9 100644
--- a/src/render/opengl/SDL_render_gl.c
+++ b/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: */
diff --git a/src/render/opengles/SDL_render_gles.c b/src/render/opengles/SDL_render_gles.c
index 941c83fdf..235073099 100644
--- a/src/render/opengles/SDL_render_gles.c
+++ b/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: */
diff --git a/src/render/opengles2/SDL_render_gles2.c b/src/render/opengles2/SDL_render_gles2.c
index 9b6d231fa..10d262c6f 100644
--- a/src/render/opengles2/SDL_render_gles2.c
+++ b/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: */
diff --git a/src/render/opengles2/SDL_shaders_gles2.c b/src/render/opengles2/SDL_shaders_gles2.c
index c92ba2374..7005583cc 100644
--- a/src/render/opengles2/SDL_shaders_gles2.c
+++ b/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: */
diff --git a/src/render/software/SDL_blendfillrect.c b/src/render/software/SDL_blendfillrect.c
index 4623028b7..b9e658505 100644
--- a/src/render/software/SDL_blendfillrect.c
+++ b/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: */
diff --git a/src/render/software/SDL_blendline.c b/src/render/software/SDL_blendline.c
index 561a48766..7f5453f6f 100644
--- a/src/render/software/SDL_blendline.c
+++ b/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: */
diff --git a/src/render/software/SDL_blendpoint.c b/src/render/software/SDL_blendpoint.c
index 60f790434..e8b8f0453 100644
--- a/src/render/software/SDL_blendpoint.c
+++ b/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: */
diff --git a/src/render/software/SDL_drawline.c b/src/render/software/SDL_drawline.c
index 508c017ef..13b27fc96 100644
--- a/src/render/software/SDL_drawline.c
+++ b/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: */
diff --git a/src/render/software/SDL_drawpoint.c b/src/render/software/SDL_drawpoint.c
index 5f648eb86..599b5506a 100644
--- a/src/render/software/SDL_drawpoint.c
+++ b/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: */
diff --git a/src/render/software/SDL_render_sw.c b/src/render/software/SDL_render_sw.c
index 44e786abe..45183dbc9 100644
--- a/src/render/software/SDL_render_sw.c
+++ b/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: */