Don't allow glReadPixels of depth buffers with ES3.1.

The ES3.1 spec does not appear to include these formats as valid glReadPixels formats. Test=KHR-GLES3.packed_pixels.rectangle.depth24_stencil8 BUG=angleproject:3520 Change-Id: I6ccd5a7fc49c2e16885cfaace56efce1d96e937a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2216713Reviewed-by: Alexis Hétu <sugoi@chromium.org> Commit-Queue: Tim Van Patten <timvp@google.com>

Don't allow glReadPixels of depth buffers with ES3.1.
a24be8c3 · Geoff Lang · Commit Bot · 3d5f0c82 · a24be8c3
Commit a24be8c3 authored May 26, 2020 by Geoff Lang Committed by Commit Bot May 27, 2020
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validationES.cpp src/libANGLE/validationES.cpp +1 -8

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--- a/src/libANGLE/validationES.cpp
+++ b/src/libANGLE/validationES.cpp
@@ -167,19 +167,12 @@ bool ValidReadPixelsUnsignedNormalizedDepthType(const Context *context,
 {
    bool supportsReadDepthNV = (context->getExtensions().readDepthNV && (info->depthBits > 0) &&
                                (info->componentCount == 1));
-    bool isGLES31            = (context->getClientVersion() >= ES_3_1);
    switch (type)
    {
        case GL_UNSIGNED_SHORT:
-            return supportsReadDepthNV ||
-                   (isGLES31 && (info->sizedInternalFormat == GL_DEPTH_COMPONENT16));
        case GL_UNSIGNED_INT:
-            return supportsReadDepthNV ||
-                   (isGLES31 && ((info->sizedInternalFormat == GL_DEPTH_COMPONENT16) ||
-                                 (info->internalFormat == GL_DEPTH_COMPONENT24)));
        case GL_UNSIGNED_INT_24_8:
-            return supportsReadDepthNV ||
-                   (isGLES31 && (info->sizedInternalFormat == GL_DEPTH24_STENCIL8));
+            return supportsReadDepthNV;
        default:
            return false;
    }