Add a spec for EGL_ANDROID_framebuffer_target.

This change adds a new extension for EGL implementations to indicate the
EGLConfigs that support use as a HWComposer framebuffer target layer.

Change-Id: Ia7c8fbe8da09d57b4ec8bf1d9ddb67ca21aa2885

2 files changed, 108 insertions, 5 deletions

diff --git a/opengl/specs/EGL_ANDROID_framebuffer_target.txt b/opengl/specs/EGL_ANDROID_framebuffer_target.txt
new file mode 100644
index 0000000..273414c
--- /dev/null
+++ b/opengl/specs/EGL_ANDROID_framebuffer_target.txt
@@ -0,0 +1,102 @@
+Name
+
+    ANDROID_framebuffer_target
+
+Name Strings
+
+    EGL_ANDROID_framebuffer_target
+
+Contributors
+
+    Jamie Gennis
+
+Contact
+
+    Jamie Gennis, Google Inc. (jgennis 'at' google.com)
+
+Status
+
+    Draft.
+
+Version
+
+    Version 1, September 20, 2012
+
+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 is used to
+    send the result of performing window composition to a display, 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 for which the buffers are passed to
+    the HWComposer HAL as a framebuffer target layer.
+
+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_FRAMEBUFFER_TARGET_ANDROID         0x3147
+
+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_FRAMEBUFFER_TARGET_ANDROID    boolean     whether use as a HWComposer
+                                                      framebuffer target layer is
+                                                      supported
+
+    Section 3.4, Configuration Management, add a row to Table 3.4.
+
+              Attribute                    Default     Selection  Sort   Sort
+                                                       Criteria   Order  Priority
+        ------------------------------  -------------  ---------  -----  --------
+        EGL_FRAMEBUFFER_TARGET_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_FRAMEBUFFER_TARGET_ANDROID is a boolean indicating whether the
+        config may be used to create an EGLSurface from an ANativeWindow for
+        which the buffers are to be passed to HWComposer as a framebuffer
+        target layer.
+
+    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
+
+
+Revision History
+
+#1 (Jamie Gennis, September 20, 2012)
+    - Initial draft.
diff --git a/opengl/specs/README b/opengl/specs/README
index af3f165..eb86869 100644
--- a/opengl/specs/README
+++ b/opengl/specs/README
@@ -8,9 +8,10 @@ for use by Android extensions.
 ----------------     ----------------------------------
 0x3140               EGL_ANDROID_image_native_buffer
 0x3141               (unused)
-0x3142               EGL_ANDROID_recordable
+0x3142               EGL_RECORDABLE_ANDROID (EGL_ANDROID_recordable)
 0x3143               EGL_VERSION_HW_ANDROID (internal use)
-0x3144               EGL_SYNC_ANDROID_FENCE_ANDROID
-0x3145               EGL_SYNC_FENCE_FD_ANDROID
-0x3146               EGL_SYNC_ANDROID_FENCE_SIGNALED_ANDROID
-0x3147 - 0x314F      (unused)
+0x3144               EGL_SYNC_NATIVE_FENCE_ANDROID (EGL_ANDROID_native_fence_sync)
+0x3145               EGL_SYNC_NATIVE_FENCE_FD_ANDROID (EGL_ANDROID_native_fence_sync)
+0x3146               EGL_SYNC_NATIVE_FENCE_SIGNALED_ANDROID (EGL_ANDROID_native_fence_sync)
+0x3147               EGL_FRAMEBUFFER_TARGET_ANDROID (EGL_ANDROID_framebuffer_target)
+0x3148 - 0x314F      (unused)