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Commit c4ac56f3 authored by Mathias Agopian's avatar Mathias Agopian Committed by Steve Kondik
Browse files

opengl: reduce PB size from 2MB to 512KB 

this allows us to enable h/w acceleration on low-end
devices while keeping memory usage down.

Bug: 6557760
Change-Id: I8af2de3038dc2579360b8b73aa452cb7a0e506a9
parent 6c498ca3

opengl/libs/Android.mk

+4 −0
Original line number Diff line number Diff line
@@ -50,6 +50,10 @@ endif 
ifeq ($(TARGET_BOARD_PLATFORM), omap4)

  LOCAL_CFLAGS += -DWORKAROUND_BUG_10194508=1

endif

ifeq ($(BOARD_EGL_SYSTEMUI_PBSIZE_HACK),true)

  # see Loader.cpp for details

  LOCAL_CFLAGS += -DSYSTEMUI_PBSIZE_HACK=1

endif

ifeq ($(BOARD_EGL_WORKAROUND_BUG_10194508),true)

  LOCAL_CFLAGS += -DWORKAROUND_BUG_10194508=1

endif

opengl/libs/EGL/Loader.cpp

+29 −0
Original line number Diff line number Diff line
@@ -393,6 +393,35 @@ void *Loader::load_driver(const char* kind, 
        ALOGE_IF(!getProcAddress,

                "can't find eglGetProcAddress() in %s", driver_absolute_path);



#ifdef SYSTEMUI_PBSIZE_HACK

#warning "SYSTEMUI_PBSIZE_HACK enabled"

        /*

         * TODO: replace SYSTEMUI_PBSIZE_HACK by something less hackish

         *

         * Here we adjust the PB size from its default value to 512KB which

         * is the minimum acceptable for the systemui process.

         * We do this on low-end devices only because it allows us to enable

         * h/w acceleration in the systemui process while keeping the

         * memory usage down.

         *

         * Obviously, this is the wrong place and wrong way to make this

         * adjustment, but at the time of this writing this was the safest

         * solution.

         */

        const char *cmdline = getProcessCmdline();

        if (strstr(cmdline, "systemui")) {

            void *imgegl = dlopen("/vendor/lib/libIMGegl.so", RTLD_LAZY);

            if (imgegl) {

                unsigned int *PVRDefaultPBS =

                        (unsigned int *)dlsym(imgegl, "PVRDefaultPBS");

                if (PVRDefaultPBS) {

                    ALOGD("setting default PBS to 512KB, was %d KB", *PVRDefaultPBS / 1024);

                    *PVRDefaultPBS = 512*1024;

                }

            }

        }

#endif



        egl_t* egl = &cnx->egl;

        __eglMustCastToProperFunctionPointerType* curr =

            (__eglMustCastToProperFunctionPointerType*)egl;