Merge change If007a2fa into eclair

* changes:
  return proper error code from eglCreateImageKHR

libs/surfaceflinger/LayerBuffer.cpp

@@ -437,9 +437,7 @@ void LayerBuffer::BufferSource::onDraw(const Region& clip) const
     }
 
     if (err != NO_ERROR) {
-        // OpenGL fall-back
-        GLuint w = 0;
-        GLuint h = 0;
+        // slower fallback
         GGLSurface t;
         t.version = sizeof(GGLSurface);
         t.width  = src.crop.r;

opengl/libagl/copybit.cpp

@@ -74,6 +74,7 @@ private:
     static int iterate_done(copybit_region_t const *, copybit_rect_t*) {
         return 0;
     }
+public:
     copybit_rect_t r;
 };
 
@@ -421,6 +422,19 @@ static bool copybit(GLint x, GLint y,
                 (enables & GGL_ENABLE_DITHER) ?
                         COPYBIT_ENABLE : COPYBIT_DISABLE);
         clipRectRegion it(c);
+
+        LOGD("dst={%d, %d, %d, %p, %p}, "
+             "src={%d, %d, %d, %p, %p}, "
+             "drect={%d,%d,%d,%d}, "
+             "srect={%d,%d,%d,%d}, "
+             "it={%d,%d,%d,%d}, " ,
+             dst.w, dst.h, dst.format, dst.base, dst.handle,
+             src.w, src.h, src.format, src.base, src.handle,
+             drect.l, drect.t, drect.r, drect.b,
+             srect.l, srect.t, srect.r, srect.b,
+             it.r.l, it.r.t, it.r.r, it.r.b
+        );
+
         err = copybit->stretch(copybit, &dst, &src, &drect, &srect, &it);
     }
     if (err != NO_ERROR) {

opengl/libs/EGL/egl.cpp

@@ -1641,8 +1641,13 @@ EGLImageKHR eglCreateImageKHR(EGLDisplay dpy, EGLContext ctx, EGLenum target,
         if (dp == 0) {
             return setError(EGL_BAD_DISPLAY, EGL_NO_IMAGE_KHR);
         }
-        // since we don't have a way to know which implementation to call,
-        // we're calling all of them
+
+        /* Since we don't have a way to know which implementation to call,
+         * we're calling all of them. If at least one of the implementation
+         * succeeded, this is a success.
+         */
+
+        EGLint currentError = eglGetError();
 
         EGLImageKHR implImages[IMPL_NUM_IMPLEMENTATIONS];
         bool success = false;
@@ -1659,9 +1664,24 @@ EGLImageKHR eglCreateImageKHR(EGLDisplay dpy, EGLContext ctx, EGLenum target,
                 }
             }
         }
-        if (!success)
+
+        if (!success) {
+            // failure, if there was an error when we entered this function,
+            // the error flag must not be updated.
+            // Otherwise, the error is whatever happened in the implementation
+            // that faulted.
+            if (currentError != EGL_SUCCESS) {
+                setError(currentError, EGL_NO_IMAGE_KHR);
+            }
             return EGL_NO_IMAGE_KHR;
-        
+        } else {
+            // In case of success, we need to clear all error flags
+            // (especially those caused by the implementation that didn't
+            // succeed). TODO: we could about this if we knew this was
+            // a "full" success (all implementation succeeded).
+            eglGetError();
+        }
+
         egl_image_t* result = new egl_image_t(dpy, ctx);
         memcpy(result->images, implImages, sizeof(implImages));
         return (EGLImageKHR)result;