Merge pull request #96705 from elmajime/camera_from_external_feed

Add support for external camera feed from external plugin on Android

drivers/gles3/shaders/SCsub

@@ -17,6 +17,7 @@ if "GLES3_GLSL" in env["BUILDERS"]:
 
     # as we have a few, not yet, converted files we name the ones we want to include:
     env.GLES3_GLSL("canvas.glsl")
+    env.GLES3_GLSL("feed.glsl")
     env.GLES3_GLSL("scene.glsl")
     env.GLES3_GLSL("sky.glsl")
     env.GLES3_GLSL("canvas_occlusion.glsl")

drivers/gles3/shaders/feed.glsl

@@ -0,0 +1,39 @@
+/* clang-format off */
+#[modes]
+
+mode_default =
+
+#[specializations]
+
+USE_EXTERNAL_SAMPLER = false
+
+#[vertex]
+
+layout(location = 0) in vec2 vertex_attrib;
+
+out vec2 uv_interp;
+
+
+void main() {
+	uv_interp = vertex_attrib * 0.5 + 0.5;
+	gl_Position = vec4(vertex_attrib, 1.0, 1.0);
+}
+
+/* clang-format off */
+#[fragment]
+
+layout(location = 0) out vec4 frag_color;
+in vec2 uv_interp;
+
+/* clang-format on */
+#ifdef USE_EXTERNAL_SAMPLER
+uniform samplerExternalOES sourceFeed; // texunit:0
+#else
+uniform sampler2D sourceFeed; // texunit:0
+#endif
+
+void main() {
+	vec4 color = texture(sourceFeed, uv_interp);
+
+	frag_color = color;
+}