From 2e20bffbab8084fedce39d14d7dd17b08f6e9ba2 Mon Sep 17 00:00:00 2001 From: Mathias Agopian Date: Mon, 4 May 2009 19:29:25 -0700 Subject: created an new EGL extension called ANDROID_swap_rectangle ANDROID_swap_rectangle allows to specify the rectangle affected by eglSwapBuffers(), anything outside of this rectangle is unchanged. in particular EGL_BUFFER_DESTROYED only applies to that rectangle. This extension as well as EGL_BUFFER_PRESERVED allow major optimizations on surfaceflinger, which can redraw only the dirty area during compositing. However, ANDROID_swap_rectangle allows further optimizations in EGL by reducing the amount of copy-back needed. ANDROID_swap_rectangle is particularily important for software implementations. --- opengl/libs/EGL/egl.cpp | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'opengl/libs/EGL') diff --git a/opengl/libs/EGL/egl.cpp b/opengl/libs/EGL/egl.cpp index 74aed20..8c37f2e 100644 --- a/opengl/libs/EGL/egl.cpp +++ b/opengl/libs/EGL/egl.cpp @@ -60,6 +60,7 @@ static char const * const gExtensionString = "KHR_image_base " "KHR_image_pixmap " "EGL_ANDROID_image_native_buffer " + "EGL_ANDROID_swap_rectangle " ; // ---------------------------------------------------------------------------- @@ -1568,3 +1569,23 @@ EGLBoolean eglDestroyImageKHR(EGLDisplay dpy, EGLImageKHR img) return EGL_FALSE; } + + +// ---------------------------------------------------------------------------- +// ANDROID extensions +// ---------------------------------------------------------------------------- + +EGLBoolean eglSetSwapRectangleANDROID(EGLDisplay dpy, EGLSurface draw, + EGLint left, EGLint top, EGLint width, EGLint height) +{ + if (!validate_display_surface(dpy, draw)) + return EGL_FALSE; + egl_display_t const * const dp = get_display(dpy); + egl_surface_t const * const s = get_surface(draw); + if (s->cnx->hooks->egl.eglSetSwapRectangleANDROID) { + return s->cnx->hooks->egl.eglSetSwapRectangleANDROID(dp->dpys[s->impl], + s->surface, left, top, width, height); + } + return EGL_FALSE; +} + -- cgit v1.1