opengl/libs/EGL: Bring back eglRenderBufferANDROID extention

This change brings back the eglGetRenderBufferANDROID extension Define EGL_EGLEXT_PROTOTYPES in order to be able to use this extension.

    Revert "cleanup EGL a bit. remove unused extension."

    This reverts commit 9d75f1341524910b00d35dd4eeb426d7e7791f6e.

Change-Id: I8b3805157cb1f72af507bc823d16910b738cec4c

2 files changed, 45 insertions, 0 deletions

diff --git a/opengl/libagl/Android.mk b/opengl/libagl/Android.mk
index ce55093..33ecbe8 100644
--- a/opengl/libagl/Android.mk
+++ b/opengl/libagl/Android.mk
@@ -47,6 +47,9 @@ endif
 ifeq ($(TARGET_HAVE_TEGRA_ERRATA_657451),true)
     LOCAL_CFLAGS += -DHAVE_TEGRA_ERRATA_657451
 endif
+ifeq ($(BOARD_USES_QCOM_HARDWARE),true)
+    LOCAL_CFLAGS += -DQCOM_HARDWARE
+endif
 LOCAL_C_INCLUDES += bionic/libc/private
 
 LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/egl
diff --git a/opengl/libagl/egl.cpp b/opengl/libagl/egl.cpp
index 6d4098c..4c6d306 100644
--- a/opengl/libagl/egl.cpp
+++ b/opengl/libagl/egl.cpp
@@ -165,6 +165,9 @@ struct egl_surface_t
     virtual     EGLint      getSwapBehavior() const;
     virtual     EGLBoolean  swapBuffers();
     virtual     EGLBoolean  setSwapRectangle(EGLint l, EGLint t, EGLint w, EGLint h);
+#ifdef QCOM_HARDWARE
+    virtual     EGLClientBuffer getRenderBuffer() const;
+#endif
 protected:
     GGLSurface              depth;
 };
@@ -208,6 +211,11 @@ EGLBoolean egl_surface_t::setSwapRectangle(
 {
     return EGL_FALSE;
 }
+#ifdef QCOM_HARDWARE
+EGLClientBuffer egl_surface_t::getRenderBuffer() const {
+    return 0;
+}
+#endif
 
 // ----------------------------------------------------------------------------
 
@@ -233,6 +241,9 @@ struct egl_window_surface_v2_t : public egl_surface_t
     virtual     EGLint      getRefreshRate() const;
     virtual     EGLint      getSwapBehavior() const;
     virtual     EGLBoolean  setSwapRectangle(EGLint l, EGLint t, EGLint w, EGLint h);
+#ifdef QCOM_HARDWARE
+    virtual     EGLClientBuffer  getRenderBuffer() const;
+#endif
     
 private:
     status_t lock(ANativeWindowBuffer* buf, int usage, void** vaddr);
@@ -571,6 +582,13 @@ EGLBoolean egl_window_surface_v2_t::setSwapRectangle(
     return EGL_TRUE;
 }
 
+#ifdef QCOM_HARDWARE
+EGLClientBuffer egl_window_surface_v2_t::getRenderBuffer() const
+{
+    return buffer;
+}
+#endif
+
 EGLBoolean egl_window_surface_v2_t::bindDrawSurface(ogles_context_t* gl)
 {
     GGLSurface buffer;
@@ -800,6 +818,9 @@ static char const * const gExtensionsString =
         // "KHR_image_pixmap "
         "EGL_ANDROID_image_native_buffer "
         "EGL_ANDROID_swap_rectangle "
+#ifdef QCOM_HARDWARE
+        "EGL_ANDROID_get_render_buffer "
+#endif
         ;
 
 // ----------------------------------------------------------------------------
@@ -852,6 +873,10 @@ static const extention_map_t gExtentionMap[] = {
             (__eglMustCastToProperFunctionPointerType)&eglDestroyImageKHR }, 
     { "eglSetSwapRectangleANDROID", 
             (__eglMustCastToProperFunctionPointerType)&eglSetSwapRectangleANDROID }, 
+#ifdef QCOM_HARDWARE
+    { "eglGetRenderBufferANDROID",
+            (__eglMustCastToProperFunctionPointerType)&eglGetRenderBufferANDROID },
+#endif
 };
 
 /*
@@ -2077,3 +2102,20 @@ EGLBoolean eglSetSwapRectangleANDROID(EGLDisplay dpy, EGLSurface draw,
 
     return EGL_TRUE;
 }
+
+#ifdef QCOM_HARDWARE
+EGLClientBuffer eglGetRenderBufferANDROID(EGLDisplay dpy, EGLSurface draw)
+{
+    if (egl_display_t::is_valid(dpy) == EGL_FALSE)
+        return setError(EGL_BAD_DISPLAY, (EGLClientBuffer)0);
+
+    egl_surface_t* d = static_cast<egl_surface_t*>(draw);
+    if (!d->isValid())
+        return setError(EGL_BAD_SURFACE, (EGLClientBuffer)0);
+    if (d->dpy != dpy)
+        return setError(EGL_BAD_DISPLAY, (EGLClientBuffer)0);
+
+    // post the surface
+    return d->getRenderBuffer();
+}
+#endif