1 files changed, 68 insertions, 0 deletions
diff --git a/servers/rendering/rasterizer_rd/shaders/copy_to_fb.glsl b/servers/rendering/rasterizer_rd/shaders/copy_to_fb.glsl
new file mode 100644
index 0000000000..1f499cf372
--- /dev/null
+++ b/servers/rendering/rasterizer_rd/shaders/copy_to_fb.glsl
@@ -0,0 +1,68 @@
+/* clang-format off */
+[vertex]
+
+#version 450
+
+VERSION_DEFINES
+
+layout(location = 0) out vec2 uv_interp;
+/* clang-format on */
+
+layout(push_constant, binding = 1, std430) uniform Params {
+	vec4 section;
+	vec2 pixel_size;
+	bool flip_y;
+	bool use_section;
+	bool force_luminance;
+	uint pad[3];
+}
+params;
+
+void main() {
+
+	vec2 base_arr[4] = vec2[](vec2(0.0, 0.0), vec2(0.0, 1.0), vec2(1.0, 1.0), vec2(1.0, 0.0));
+	uv_interp = base_arr[gl_VertexIndex];
+
+	if (params.use_section) {
+		uv_interp = params.section.xy + uv_interp * params.section.zw;
+	}
+
+	gl_Position = vec4(uv_interp * 2.0 - 1.0, 0.0, 1.0);
+
+	if (params.flip_y) {
+		uv_interp.y = 1.0 - uv_interp.y;
+	}
+}
+
+/* clang-format off */
+[fragment]
+
+#version 450
+
+VERSION_DEFINES
+
+layout(push_constant, binding = 1, std430) uniform Params {
+	vec4 section;
+	vec2 pixel_size;
+	bool flip_y;
+	bool use_section;
+	bool force_luminance;
+	uint pad[3];
+} params;
+
+
+layout(location = 0) in vec2 uv_interp;
+/* clang-format on */
+
+layout(set = 0, binding = 0) uniform sampler2D source_color;
+
+layout(location = 0) out vec4 frag_color;
+
+void main() {
+
+	vec4 color = texture(source_color, uv_interp, 0.0);
+	if (params.force_luminance) {
+		color.rgb = vec3(max(max(color.r, color.g), color.b));
+	}
+	frag_color = color;
+}