libobs: Add 'solid' effect for basic primitives

build/data/libobs/solid.effect

@@ -0,0 +1,54 @@
+uniform float4x4 ViewProj;
+uniform float4 color = {1.0, 1.0, 1.0, 1.0};
+
+struct SolidVertInOut {
+	float4 pos : POSITION;
+};
+
+SolidVertInOut VSSolid(SolidVertInOut vert_in)
+{
+	SolidVertInOut vert_out;
+	vert_out.pos = mul(float4(vert_in.pos.xyz, 1.0), ViewProj);
+	return vert_out;
+}
+
+float4 PSSolid(SolidVertInOut vert_in) : TARGET
+{
+	return color;
+}
+
+struct SolidColoredVertInOut {
+	float4 pos   : POSITION;
+	float4 color : COLOR;
+};
+
+SolidColoredVertInOut VSSolidColored(SolidColoredVertInOut vert_in)
+{
+	SolidColoredVertInOut vert_out;
+	vert_out.pos   = mul(float4(vert_in.pos.xyz, 1.0), ViewProj);
+	vert_out.color = vert_in.color;
+	return vert_out;
+}
+
+float4 PSSolidColored(SolidColoredVertInOut vert_in) : TARGET
+{
+	return vert_in.color * color;
+}
+
+technique Solid
+{
+	pass
+	{
+		vertex_shader = VSSolid(vert_in);
+		pixel_shader  = PSSolid(vert_in);
+	}
+}
+
+technique SolidColored
+{
+	pass
+	{
+		vertex_shader = VSSolidColored(vert_in);
+		pixel_shader  = PSSolidColored(vert_in);
+	}
+}

libobs/obs.c

@@ -218,6 +218,11 @@ static bool obs_init_graphics(struct obs_video_info *ovi)
 				NULL);
 		bfree(filename);
 
+		filename = find_libobs_data_file("solid.effect");
+		video->solid_effect = gs_create_effect_from_file(filename,
+				NULL);
+		bfree(filename);
+
 		filename = find_libobs_data_file("format_conversion.effect");
 		video->conversion_effect = gs_create_effect_from_file(filename,
 				NULL);
@@ -225,6 +230,8 @@ static bool obs_init_graphics(struct obs_video_info *ovi)
 
 		if (!video->default_effect)
 			success = false;
+		if (!video->solid_effect)
+			success = false;
 		if (!video->conversion_effect)
 			success = false;
 	}
@@ -342,6 +349,7 @@ static void obs_free_graphics(void)
 		gs_entercontext(video->graphics);
 
 		effect_destroy(video->default_effect);
+		effect_destroy(video->solid_effect);
 		effect_destroy(video->conversion_effect);
 		video->default_effect = NULL;
 
@@ -964,6 +972,12 @@ effect_t obs_get_default_effect(void)
 	return obs->video.default_effect;
 }
 
+effect_t obs_get_solid_effect(void)
+{
+	if (!obs) return NULL;
+	return obs->video.solid_effect;
+}
+
 signal_handler_t obs_signalhandler(void)
 {
 	if (!obs) return NULL;

libobs/obs.h

@@ -317,6 +317,9 @@ EXPORT char *obs_find_plugin_file(const char *file);
 /** Returns the default effect for generic RGB/YUV drawing */
 EXPORT effect_t obs_get_default_effect(void);
 
+/** Returns the solid effect for drawing solid colors */
+EXPORT effect_t obs_get_solid_effect(void);
+
 /** Returns the primary obs signal handler */
 EXPORT signal_handler_t obs_signalhandler(void);