Fixed bug 4882 - Fix build for iOS when disabling OpenGL

Aaron Barany

Since OpenGL is deprecated on iOS, it is advantageous to be able to remove all OpenGL related code when building SDL for iOS. This patch adds the necessary #if checks to compile in this case.

src/video/uikit/SDL_uikitevents.m

@@ -65,7 +65,9 @@ UIKit_PumpEvents(_THIS)
     } while(result == kCFRunLoopRunHandledSource);
 
     /* See the comment in the function definition. */
+#if SDL_VIDEO_OPENGL_ES || SDL_VIDEO_OPENGL_ES2
     UIKit_GL_RestoreCurrentContext();
+#endif
 }
 
 #endif /* SDL_VIDEO_DRIVER_UIKIT */

src/video/uikit/SDL_uikitopengles.h

@@ -21,6 +21,8 @@
 #ifndef SDL_uikitopengles_
 #define SDL_uikitopengles_
 
+#if SDL_VIDEO_OPENGL_ES || SDL_VIDEO_OPENGL_ES2
+
 #include "../SDL_sysvideo.h"
 
 extern int UIKit_GL_MakeCurrent(_THIS, SDL_Window * window,
@@ -35,6 +37,8 @@ extern int UIKit_GL_LoadLibrary(_THIS, const char *path);
 
 extern void UIKit_GL_RestoreCurrentContext(void);
 
+#endif // SDL_VIDEO_OPENGL_ES || SDL_VIDEO_OPENGL_ES2
+
 #endif /* SDL_uikitopengles_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

src/video/uikit/SDL_uikitopengles.m

@@ -20,7 +20,7 @@
 */
 #include "../../SDL_internal.h"
 
-#if SDL_VIDEO_DRIVER_UIKIT
+#if SDL_VIDEO_DRIVER_UIKIT && (SDL_VIDEO_OPENGL_ES || SDL_VIDEO_OPENGL_ES2)
 
 #include "SDL_uikitopengles.h"
 #import "SDL_uikitopenglview.h"

src/video/uikit/SDL_uikitopenglview.h

@@ -19,6 +19,8 @@
   3. This notice may not be removed or altered from any source distribution.
 */
 
+#if SDL_VIDEO_OPENGL_ES || SDL_VIDEO_OPENGL_ES2
+
 #import <UIKit/UIKit.h>
 #import <OpenGLES/EAGL.h>
 #import <OpenGLES/ES3/gl.h>
@@ -57,4 +59,6 @@
 
 @end
 
+#endif // SDL_VIDEO_OPENGL_ES || SDL_VIDEO_OPENGL_ES2
+
 /* vi: set ts=4 sw=4 expandtab: */

src/video/uikit/SDL_uikitopenglview.m

@@ -20,7 +20,7 @@
 */
 #include "../../SDL_internal.h"
 
-#if SDL_VIDEO_DRIVER_UIKIT
+#if SDL_VIDEO_DRIVER_UIKIT && (SDL_VIDEO_OPENGL_ES || SDL_VIDEO_OPENGL_ES2)
 
 #include <OpenGLES/EAGLDrawable.h>
 #include <OpenGLES/ES2/glext.h>

src/video/uikit/SDL_uikitvideo.m

@@ -116,6 +116,7 @@ UIKit_CreateDevice(int devindex)
         device->HasClipboardText = UIKit_HasClipboardText;
 
         /* OpenGL (ES) functions */
+#if SDL_VIDEO_OPENGL_ES || SDL_VIDEO_OPENGL_ES2
         device->GL_MakeCurrent      = UIKit_GL_MakeCurrent;
         device->GL_GetDrawableSize  = UIKit_GL_GetDrawableSize;
         device->GL_SwapWindow       = UIKit_GL_SwapWindow;
@@ -123,6 +124,7 @@ UIKit_CreateDevice(int devindex)
         device->GL_DeleteContext    = UIKit_GL_DeleteContext;
         device->GL_GetProcAddress   = UIKit_GL_GetProcAddress;
         device->GL_LoadLibrary      = UIKit_GL_LoadLibrary;
+#endif
         device->free = UIKit_DeleteDevice;
 
 #if SDL_VIDEO_VULKAN

src/video/uikit/SDL_uikitviewcontroller.m

@@ -180,7 +180,9 @@ SDL_HideHomeIndicatorHintChanged(void *userdata, const char *name, const char *o
     /* Don't run the game loop while a messagebox is up */
     if (!UIKit_ShowingMessageBox()) {
         /* See the comment in the function definition. */
+#if SDL_VIDEO_OPENGL_ES || SDL_VIDEO_OPENGL_ES2
         UIKit_GL_RestoreCurrentContext();
+#endif
 
         animationCallback(animationCallbackParam);
     }

src/video/uikit/SDL_uikitwindow.m

@@ -364,12 +364,16 @@ UIKit_GetWindowWMInfo(_THIS, SDL_Window * window, SDL_SysWMinfo * info)
 
             /* These struct members were added in SDL 2.0.4. */
             if (versionnum >= SDL_VERSIONNUM(2,0,4)) {
+#if SDL_VIDEO_OPENGL_ES || SDL_VIDEO_OPENGL_ES2
                 if ([data.viewcontroller.view isKindOfClass:[SDL_uikitopenglview class]]) {
                     SDL_uikitopenglview *glview = (SDL_uikitopenglview *)data.viewcontroller.view;
                     info->info.uikit.framebuffer = glview.drawableFramebuffer;
                     info->info.uikit.colorbuffer = glview.drawableRenderbuffer;
                     info->info.uikit.resolveFramebuffer = glview.msaaResolveFramebuffer;
                 } else {
+#else
+                {
+#endif
                     info->info.uikit.framebuffer = 0;
                     info->info.uikit.colorbuffer = 0;
                     info->info.uikit.resolveFramebuffer = 0;