Don't reset the texture size to zero in TextureGL::releaseTexImage on Mac.

After unbinding IOSurface textures, we reset the texture size to 0 because
some platforms don't correctly update their state tracking.  This call ends
up generating GL_INVALID_OPERATION errors on Mac for unknown reasons.

Skip the call, the size reset is not required on Mac anyways.

BUG=angleproject:3859

Change-Id: I5e39b6a36aaff41082a5fcc923970f8e97774675
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1769059
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

include/platform/FeaturesGL.h

@@ -338,6 +338,12 @@ struct FeaturesGL : FeatureSetBase
         "clip_src_region_for_blitframebuffer", FeatureCategory::OpenGLWorkarounds,
         "Mac has issues with blitFramebuffer when the parameters don't match the framebuffer size.",
         &members, "http://crbug.com/830046"};
+
+    // Calling glTexImage2D with zero size on a rectangle texture generates GL errors
+    Feature resettingRectangleTexturesGeneratesErrors = {
+        "reset_rectangle_texture_generates_errors", FeatureCategory::OpenGLWorkarounds,
+        "Calling glTexImage2D with zero size on a rectangle texture generates errors.", &members,
+        "http://anglebug.com/3859"};
 };
 
 inline FeaturesGL::FeaturesGL()  = default;

src/libANGLE/renderer/gl/TextureGL.cpp

@@ -1191,9 +1191,13 @@ angle::Result TextureGL::bindTexImage(const gl::Context *context, egl::Surface *
 
 angle::Result TextureGL::releaseTexImage(const gl::Context *context)
 {
-    // Not all Surface implementations reset the size of mip 0 when releasing, do it manually
     ASSERT(getType() == gl::TextureType::_2D || getType() == gl::TextureType::Rectangle);
 
+    const angle::FeaturesGL &features = GetFeaturesGL(context);
+    if (getType() != gl::TextureType::Rectangle &&
+        !features.resettingRectangleTexturesGeneratesErrors.enabled)
+    {
+        // Not all Surface implementations reset the size of mip 0 when releasing, do it manually
         const FunctionsGL *functions = GetFunctionsGL(context);
         StateManagerGL *stateManager = GetStateManagerGL(context);
 
@@ -1201,6 +1205,8 @@ angle::Result TextureGL::releaseTexImage(const gl::Context *context)
         ASSERT(nativegl::UseTexImage2D(getType()));
         functions->texImage2D(ToGLenum(getType()), 0, GL_RGBA, 0, 0, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                               nullptr);
+    }
+
     return angle::Result::Continue;
 }
 

src/libANGLE/renderer/gl/renderergl_utils.cpp

@@ -1545,6 +1545,8 @@ void InitializeFeatures(const FunctionsGL *functions, angle::FeaturesGL *feature
         IsLinux() || (IsAndroid() && IsNvidia(vendor)) || (IsWindows() && IsNvidia(vendor));
 
     features->clipSrcRegionBlitFramebuffer.enabled = IsApple();
+
+    features->resettingRectangleTexturesGeneratesErrors.enabled = IsApple();
 }
 
 void InitializeFrontendFeatures(const FunctionsGL *functions, angle::FrontendFeatures *features)