Add the EGL_ANDROID_recordable spec.

Change-Id: I002177a68fafd6bb941aa64445c85fd5ff56223a

2 files changed, 125 insertions, 0 deletions

diff --git a/opengl/specs/EGL_ANDROID_recordable.txt b/opengl/specs/EGL_ANDROID_recordable.txt
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+Name
+
+    ANDROID_recordable
+
+Name Strings
+
+    EGL_ANDROID_recordable
+
+Contributors
+
+    Jamie Gennis
+
+Contact
+
+    Jamie Gennis, Google Inc. (jgennis 'at' google.com)
+
+Status
+
+    Draft.
+
+Version
+
+    Version 1, July 8, 2011
+
+Number
+
+    EGL Extension #XXX
+
+Dependencies
+
+    Requires EGL 1.0
+
+    This extension is written against the wording of the EGL 1.4 Specification
+
+Overview
+
+    Android supports a number of different ANativeWindow implementations that
+    can be used to create an EGLSurface.  One implementation, which records the
+    rendered image as a video each time eglSwapBuffers gets called, may have
+    some device-specific restrictions.  Because of this, some EGLConfigs may be
+    incompatible with these ANativeWindows.  This extension introduces a new
+    boolean EGLConfig attribute that indicates whether the EGLConfig supports
+    rendering to an ANativeWindow that records images to a video.
+
+New Types
+
+    None.
+
+New Procedures and Functions
+
+    None.
+
+New Tokens
+
+    Accepted by the <attribute> parameter of eglGetConfigAttrib and
+    the <attrib_list> parameter of eglChooseConfig:
+
+        EGL_RECORDABLE_ANDROID                      0xXXXX
+
+Changes to Chapter 3 of the EGL 1.4 Specification (EGL Functions and Errors)
+
+    Section 3.4, Configuration Management, add a row to Table 3.1.
+    
+              Attribute             Type                 Notes
+        ----------------------     -------     --------------------------
+        EGL_RECORDABLE_ANDROID     boolean     whether video recording is
+                                               supported
+
+    Section 3.4, Configuration Management, add a row to Table 3.4.
+
+              Attribute            Default     Selection  Sort   Sort
+                                               Criteria   Order  Priority
+        ----------------------  -------------  ---------  -----  --------
+        EGL_RECORDABLE_ANDROID  EGL_DONT_CARE    Exact    None
+
+    Section 3.4, Configuration Management, add a paragraph at the end of the
+    subsection titled Other EGLConfig Attribute Descriptions.
+
+        EGL_RECORDABLE_ANDROID is a boolean indicating whether the config may
+        be used to create an EGLSurface from an ANativeWindow that is a video
+        recorder as indicated by the NATIVE_WINDOW_IS_VIDEO_RECORDER query on
+        the ANativeWindow.
+
+    Section 3.4.1, Querying Configurations, change the last paragraph as follow
+
+        EGLConfigs are not sorted with respect to the parameters
+        EGL_BIND_TO_TEXTURE_RGB, EGL_BIND_TO_TEXTURE_RGBA, EGL_CONFORMANT,
+        EGL_LEVEL, EGL_NATIVE_RENDERABLE, EGL_MAX_SWAP_INTERVAL,
+        EGL_MIN_SWAP_INTERVAL, EGL_RENDERABLE_TYPE, EGL_SURFACE_TYPE,
+        EGL_TRANSPARENT_TYPE, EGL_TRANSPARENT_RED_VALUE,
+        EGL_TRANSPARENT_GREEN_VALUE, EGL_TRANSPARENT_BLUE_VALUE, and
+        EGL_RECORDABLE_ANDROID.
+
+Issues
+
+    1. Should this functionality be exposed as a new attribute or as a bit in
+    the EGL_SURFACE_TYPE bitfield?
+
+    RESOLVED: It should be a new attribute.  It does not make sense to use up a
+    bit in the limit-size bitfield for a platform-specific extension.
+
+    2. How should the new attribute affect the sorting of EGLConfigs?
+
+    RESOLVED: It should not affect sorting.  Some implementations may not have
+    any drawback associated with using a recordable EGLConfig.  Such
+    implementations should not have to double-up some of their configs to  one sort earlier than .
+    Implementations that do have drawbacks can use the existing caveat
+    mechanism to report this drawback to the client.
+
+Revision History
+
+#1 (Jamie Gennis, July 8, 2011)
+    - Initial draft.
diff --git a/opengl/specs/README b/opengl/specs/README
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+This directory contains OpenGL ES and EGL extension specifications that have
+been or are being defined for Android.  
+
+The table below tracks usage of EGL enumerant values that have been reserved
+for use by Android extensions.
+
+     Value                       Extension
+----------------     ----------------------------------
+0x3140               EGL_ANDROID_image_native_buffer
+0x3141               (unused)
+0x3142               EGL_ANDROID_recordable
+0x3143 - 0x314F      (unused)