make direct filter rendering optional (can be useful for certain cases)

libobs/obs-source.c

@@ -968,7 +968,8 @@ static inline void render_filter_tex(texture_t tex, effect_t effect,
 }
 
 void obs_source_process_filter(obs_source_t filter, texrender_t texrender,
-		effect_t effect, uint32_t width, uint32_t height)
+		effect_t effect, uint32_t width, uint32_t height,
+		enum allow_direct_render allow_direct)
 {
 	obs_source_t target       = obs_filter_gettarget(filter);
 	obs_source_t parent       = obs_filter_getparent(filter);
@@ -977,19 +978,24 @@ void obs_source_process_filter(obs_source_t filter, texrender_t texrender,
 	int          cx           = obs_source_getwidth(target);
 	int          cy           = obs_source_getheight(target);
 	bool         yuv          = (target_flags & SOURCE_YUV) != 0;
+	bool         expects_def  = (parent_flags & SOURCE_DEFAULT_EFFECT) != 0;
+	bool         can_directly = allow_direct == ALLOW_DIRECT_RENDERING;
 
 	/* if the parent does not use any custom effects, and this is the last
 	 * filter in the chain for the parent, then render the parent directly
 	 * using the filter effect instead of rendering to texture to reduce
 	 * the total number of passes */
-	if ((parent_flags & SOURCE_DEFAULT_EFFECT) != 0 && target == parent) {
+	if (can_directly && expects_def && target == parent) {
 		render_filter_bypass(target, effect, width, height, yuv);
 		return;
 	}
 
 	if (texrender_begin(texrender, cx, cy)) {
 		gs_ortho(0.0f, (float)cx, 0.0f, (float)cy, -100.0f, 100.0f);
-		obs_source_video_render(target);
+		if (expects_def && parent == target)
+			obs_source_default_render(parent, yuv);
+		else
+			obs_source_video_render(target);
 		texrender_end(texrender);
 	}
 

libobs/obs.h

@@ -60,6 +60,11 @@ enum order_movement {
 	ORDER_MOVE_BOTTOM
 };
 
+enum allow_direct_render {
+	NO_DIRECT_RENDERING,
+	ALLOW_DIRECT_RENDERING,
+};
+
 struct obs_video_info {
 	/* graphics module to use (usually "libobs-opengl" or "libobs-d3d11") */
 	const char          *graphics_module;
@@ -412,7 +417,8 @@ EXPORT void obs_source_releaseframe(obs_source_t source,
 /** Default RGB filter handler for generic effect filters */
 EXPORT void obs_source_process_filter(obs_source_t filter,
 		texrender_t texrender, effect_t effect,
-		uint32_t width, uint32_t height);
+		uint32_t width, uint32_t height,
+		enum allow_direct_render allow_direct);
 
 
 /* ------------------------------------------------------------------------- */

test/test-input/test-filter.c

@@ -56,5 +56,5 @@ void test_video_tick(struct test_filter *tf, float seconds)
 void test_video_render(struct test_filter *tf)
 {
 	obs_source_process_filter(tf->source, tf->texrender, tf->whatever,
-			0, 0);
+			0, 0, ALLOW_DIRECT_RENDERING);
 }