UI: Add scene item canvas overflow to preview

libobs/data/repeat.effect

@@ -0,0 +1,55 @@
+uniform float4x4 ViewProj;
+uniform float4x4 color_matrix;
+uniform float3 color_range_min = {0.0, 0.0, 0.0};
+uniform float3 color_range_max = {1.0, 1.0, 1.0};
+uniform texture2d image;
+uniform float2 scale;
+
+sampler_state def_sampler {
+	Filter   = Linear;
+	AddressU = Repeat;
+	AddressV = Repeat;
+};
+
+struct VertInOut {
+	float4 pos : POSITION;
+	float2 uv  : TEXCOORD0;
+};
+
+VertInOut VSDefault(VertInOut vert_in)
+{
+	VertInOut vert_out;
+	vert_out.pos = mul(float4(vert_in.pos.xyz, 1.0), ViewProj);
+	vert_out.uv  = vert_in.uv * scale;
+	return vert_out;
+}
+
+float4 PSDrawBare(VertInOut vert_in) : TARGET
+{
+	return image.Sample(def_sampler, vert_in.uv);
+}
+
+float4 PSDrawMatrix(VertInOut vert_in) : TARGET
+{
+	float4 yuv = image.Sample(def_sampler, vert_in.uv);
+	yuv.xyz = clamp(yuv.xyz, color_range_min, color_range_max);
+	return saturate(mul(float4(yuv.xyz, 1.0), color_matrix));
+}
+
+technique Draw
+{
+	pass
+	{
+		vertex_shader = VSDefault(vert_in);
+		pixel_shader  = PSDrawBare(vert_in);
+	}
+}
+
+technique DrawMatrix
+{
+	pass
+	{
+		vertex_shader = VSDefault(vert_in);
+		pixel_shader  = PSDrawMatrix(vert_in);
+	}
+}

libobs/obs-internal.h

@@ -255,6 +255,7 @@ struct obs_core_video {
 	gs_effect_t                     *default_rect_effect;
 	gs_effect_t                     *opaque_effect;
 	gs_effect_t                     *solid_effect;
+	gs_effect_t                     *repeat_effect;
 	gs_effect_t                     *conversion_effect;
 	gs_effect_t                     *bicubic_effect;
 	gs_effect_t                     *lanczos_effect;

libobs/obs.c

@@ -309,6 +309,11 @@ static int obs_init_graphics(struct obs_video_info *ovi)
 			NULL);
 	bfree(filename);
 
+	filename = obs_find_data_file("repeat.effect");
+	video->repeat_effect = gs_effect_create_from_file(filename,
+		NULL);
+	bfree(filename);
+
 	filename = obs_find_data_file("format_conversion.effect");
 	video->conversion_effect = gs_effect_create_from_file(filename,
 			NULL);
@@ -1570,6 +1575,8 @@ gs_effect_t *obs_get_base_effect(enum obs_base_effect effect)
 		return obs->video.opaque_effect;
 	case OBS_EFFECT_SOLID:
 		return obs->video.solid_effect;
+	case OBS_EFFECT_REPEAT:
+		return obs->video.repeat_effect;
 	case OBS_EFFECT_BICUBIC:
 		return obs->video.bicubic_effect;
 	case OBS_EFFECT_LANCZOS:

libobs/obs.h

@@ -601,6 +601,7 @@ enum obs_base_effect {
 	OBS_EFFECT_LANCZOS,            /**< Lanczos downscale */
 	OBS_EFFECT_BILINEAR_LOWRES,    /**< Bilinear low resolution downscale */
 	OBS_EFFECT_PREMULTIPLIED_ALPHA,/**< Premultiplied alpha */
+	OBS_EFFECT_REPEAT,             /**< RGB/YUV (repeating) */
 };
 
 /** Returns a commonly used base effect */