egl/android: support for EGL_KHR_partial_update

This patch adds support for the EGL_KHR_partial_update extension for
android platform. It passes 36/37 tests in dEQP for EGL_KHR_partial_update.
1 test not supported.

v2: add fallback for eglSetDamageRegionKHR (Tapani)

v3: The native_window_set_surface_damage call is available only from
    Android version 6.0. Reintroduce the ANDROID_VERSION guard and
    advertise extension only if version is >= 6.0. (Emil Velikov)

v4: use newly introduced ANDROID_API_LEVEL guard rather than
    ANDROID_VERSION guard to advertise the extension.The extension
    is advertised only if ANDROID_API_LEVEL >= 23 (Android 6.0 or
    greater). Add fallback function for platforms other than Android.
    Fix possible math overflow. (Emil Velikov)
    Return immediately when n_rects is 0. Place function's entrypoint
    in alphabetical order. (Eric Engestrom)

v5: Replace unnecessary calloc with malloc (Eric)
    Check for BAD_ALLOC error (Emil)
    Check for error in native_window_set_damage_region. (Emil, Tapani,
    Eric).

Signed-off-by: Harish Krupo <[email protected]>
Reviewed-by: Emil Velikov <[email protected]>
Reviewed-by: Eric Engestrom <[email protected]>
Reviewed-by: Tapani Pälli <[email protected]>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/egl/main/eglsurface.c b/src/egl/main/eglsurface.c
index 5b3e83ee92c..8094912ba12 100644
--- a/src/egl/main/eglsurface.c
+++ b/src/egl/main/eglsurface.c
@@ -317,6 +317,8 @@ _eglInitSurface(_EGLSurface *surf, _EGLDisplay *dpy, EGLint type,
    surf->AspectRatio = EGL_UNKNOWN;
 
    surf->PostSubBufferSupportedNV = EGL_FALSE;
+   surf->SetDamageRegionCalled = EGL_FALSE;
+   surf->BufferAgeRead = EGL_FALSE;
 
    /* the default swap interval is 1 */
    _eglClampSwapInterval(surf, 1);
@@ -409,11 +411,18 @@ _eglQuerySurface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surface,
          _eglError(EGL_BAD_ATTRIBUTE, "eglQuerySurface");
          return EGL_FALSE;
       }
+      _EGLContext *ctx = _eglGetCurrentContext();
       EGLint result = drv->API.QueryBufferAge(drv, dpy, surface);
       /* error happened */
       if (result < 0)
          return EGL_FALSE;
+      if (_eglGetContextHandle(ctx) == EGL_NO_CONTEXT ||
+          ctx->DrawSurface != surface) {
+         _eglError(EGL_BAD_SURFACE, "eglQuerySurface");
+         return EGL_FALSE;
+      }
       *value = result;
+      surface->BufferAgeRead = EGL_TRUE;
       break;
    default:
       _eglError(EGL_BAD_ATTRIBUTE, "eglQuerySurface");