[feature]: Support GL_External_OES #13832

editor/assets/chunks/common/texture/texture-lod.chunk

@@ -1,6 +1,8 @@
 // Copyright (c) 2017-2020 Xiamen Yaji Software Co., Ltd.
 
 #pragma extension([GL_EXT_shader_texture_lod, __VERSION__ < 130])
+#pragma extension([GL_OES_EGL_image_external, __VERSION__ >= 100, require])
+#pragma extension([GL_OES_EGL_image_external_essl3, __VERSION__ >= 300, require])
 
 vec4 fragTextureLod (sampler2D tex, vec2 coord, float lod) {
   #if __VERSION__ < 130

editor/assets/effects/builtin-texture-oes.effect

@@ -0,0 +1,27 @@
+// Effect Syntax Guide: https://docs.cocos.com/creator/manual/zh/shader/index.html
+
+CCEffect %{
+  techniques:
+  - name: opaque
+    passes:
+    - vert: legacy/main-functions/general-vs:vert # builtin header
+      frag: unlit-oes-fs:frag
+      properties: &props
+        mainTexture:    { value: white }
+}%
+
+CCProgram unlit-oes-fs %{
+  precision highp float;
+  #include <common/texture/texture-lod>
+  #include <legacy/output>
+
+  in vec2 v_uv;
+  in vec3 v_position;
+
+  uniform samplerExternalOES mainTexture;
+
+  vec4 frag () {
+    vec4 col = texture(mainTexture, v_uv);
+    return CCFragOutput(col);
+  }
+}%

editor/assets/effects/builtin-texture-oes.effect.meta

@@ -0,0 +1,11 @@
+{
+  "ver": "1.6.2",
+  "importer": "effect",
+  "imported": true,
+  "uuid": "1d720f90-c734-4173-a814-a3afcdb5cf2a",
+  "files": [
+    ".json"
+  ],
+  "subMetas": {},
+  "userData": {}
+}

editor/exports/offline-mappings.ts

@@ -87,6 +87,7 @@ typeMap.sampler1DArrayShadow = Type.SAMPLER1D_ARRAY;
 typeMap.isampler2D = Type.SAMPLER2D;
 typeMap.usampler2D = Type.SAMPLER2D;
 typeMap.sampler2DShadow = Type.SAMPLER2D;
+typeMap.samplerExternalOES = Type.SAMPLER2D;
 typeMap.isampler2DArray = Type.SAMPLER2D_ARRAY;
 typeMap.usampler2DArray = Type.SAMPLER2D_ARRAY;
 typeMap.sampler2DArrayShadow = Type.SAMPLER2D_ARRAY;