libEGL: Add wrappers for partial update functions

This adds EGL wrapper functions for the following EGL extensions:
    EGL_EXT_buffer_age
    EGL_KHR_partial_update
    EGL_KHR_swap_buffers_with_damage

Change-Id: I407acda1e0310f7f01a5efe9c915721a941138a4

2 files changed, 80 insertions, 3 deletions

diff --git a/opengl/libs/EGL/eglApi.cpp b/opengl/libs/EGL/eglApi.cpp
index 11a13c311..f5b90dd84 100644
--- a/opengl/libs/EGL/eglApi.cpp
+++ b/opengl/libs/EGL/eglApi.cpp
@@ -80,6 +80,7 @@ struct extention_map_t {
 extern char const * const gBuiltinExtensionString =
         "EGL_KHR_get_all_proc_addresses "
         "EGL_ANDROID_presentation_time "
+        "EGL_KHR_swap_buffers_with_damage "
         ;
 extern char const * const gExtensionString  =
         "EGL_KHR_image "                        // mandatory
@@ -100,6 +101,8 @@ extern char const * const gExtensionString  =
         "EGL_ANDROID_image_native_buffer "      // mandatory
         "EGL_KHR_wait_sync "                    // strongly recommended
         "EGL_ANDROID_recordable "               // mandatory
+        "EGL_KHR_partial_update "               // strongly recommended
+        "EGL_EXT_buffer_age "                   // strongly recommended with partial_update
         ;
 
 // extensions not exposed to applications but used by the ANDROID system
@@ -152,6 +155,14 @@ static const extention_map_t sExtensionMap[] = {
     // EGL_ANDROID_presentation_time
     { "eglPresentationTimeANDROID",
             (__eglMustCastToProperFunctionPointerType)&eglPresentationTimeANDROID },
+
+    // EGL_KHR_swap_buffers_with_damage
+    { "eglSwapBuffersWithDamageKHR",
+            (__eglMustCastToProperFunctionPointerType)&eglSwapBuffersWithDamageKHR },
+
+    // EGL_KHR_partial_update
+    { "eglSetDamageRegionKHR",
+            (__eglMustCastToProperFunctionPointerType)&eglSetDamageRegionKHR },
 };
 
 /*
@@ -1021,7 +1032,8 @@ private:
     Mutex mMutex;
 };
 
-EGLBoolean eglSwapBuffers(EGLDisplay dpy, EGLSurface draw)
+EGLBoolean eglSwapBuffersWithDamageKHR(EGLDisplay dpy, EGLSurface draw,
+        EGLint *rects, EGLint n_rects)
 {
     ATRACE_CALL();
     clearError();
@@ -1080,7 +1092,38 @@ EGLBoolean eglSwapBuffers(EGLDisplay dpy, EGLSurface draw)
         }
     }
 
-    return s->cnx->egl.eglSwapBuffers(dp->disp.dpy, s->surface);
+    if (n_rects == 0) {
+        return s->cnx->egl.eglSwapBuffers(dp->disp.dpy, s->surface);
+    }
+
+    Vector<android_native_rect_t> androidRects;
+    for (int r = 0; r < n_rects; ++r) {
+        int offset = r * 4;
+        int x = rects[offset];
+        int y = rects[offset + 1];
+        int width = rects[offset + 2];
+        int height = rects[offset + 3];
+        android_native_rect_t androidRect;
+        androidRect.left = x;
+        androidRect.top = y + height;
+        androidRect.right = x + width;
+        androidRect.bottom = y;
+        androidRects.push_back(androidRect);
+    }
+    native_window_set_surface_damage(s->win.get(), androidRects.array(),
+            androidRects.size());
+
+    if (s->cnx->egl.eglSwapBuffersWithDamageKHR) {
+        return s->cnx->egl.eglSwapBuffersWithDamageKHR(dp->disp.dpy, s->surface,
+                rects, n_rects);
+    } else {
+        return s->cnx->egl.eglSwapBuffers(dp->disp.dpy, s->surface);
+    }
+}
+
+EGLBoolean eglSwapBuffers(EGLDisplay dpy, EGLSurface surface)
+{
+    return eglSwapBuffersWithDamageKHR(dpy, surface, NULL, 0);
 }
 
 EGLBoolean eglCopyBuffers(  EGLDisplay dpy, EGLSurface surface,
@@ -1569,3 +1612,32 @@ EGLuint64NV eglGetSystemTimeNV()
 
     return setErrorQuiet(EGL_BAD_DISPLAY, 0);
 }
+
+// ----------------------------------------------------------------------------
+// Partial update extension
+// ----------------------------------------------------------------------------
+EGLBoolean eglSetDamageRegionKHR(EGLDisplay dpy, EGLSurface surface,
+        EGLint *rects, EGLint n_rects)
+{
+    clearError();
+
+    const egl_display_ptr dp = validate_display(dpy);
+    if (!dp) {
+        setError(EGL_BAD_DISPLAY, EGL_FALSE);
+        return EGL_FALSE;
+    }
+
+    SurfaceRef _s(dp.get(), surface);
+    if (!_s.get()) {
+        setError(EGL_BAD_SURFACE, EGL_FALSE);
+        return EGL_FALSE;
+    }
+
+    egl_surface_t const * const s = get_surface(surface);
+    if (s->cnx->egl.eglSetDamageRegionKHR) {
+        return s->cnx->egl.eglSetDamageRegionKHR(dp->disp.dpy, s->surface,
+                rects, n_rects);
+    }
+
+    return EGL_FALSE;
+}
diff --git a/opengl/libs/EGL/egl_entries.in b/opengl/libs/EGL/egl_entries.in
index 70d0e52fd..1e27cb64f 100644
--- a/opengl/libs/EGL/egl_entries.in
+++ b/opengl/libs/EGL/egl_entries.in
@@ -89,4 +89,9 @@ EGL_ENTRY(EGLuint64NV, eglGetSystemTimeNV, void)
 /* IMG extensions */
 
 EGL_ENTRY(EGLBoolean, eglHibernateProcessIMG, void)
-EGL_ENTRY(EGLBoolean, eglAwakenProcessIMG, void)
\ No newline at end of file
+EGL_ENTRY(EGLBoolean, eglAwakenProcessIMG, void)
+
+/* Partial update extensions */
+
+EGL_ENTRY(EGLBoolean, eglSwapBuffersWithDamageKHR, EGLDisplay, EGLSurface, EGLint *, EGLint)
+EGL_ENTRY(EGLBoolean, eglSetDamageRegionKHR, EGLDisplay, EGLSurface, EGLint *, EGLint)