fix [2421247] implement eglGetProcAddress(), needed in the ndk
Change-Id: I5027a27b43c0dd449a404024087853ca05bb8e4e
This commit is contained in:
Mathias Agopian
parent
bb0628d9de
commit
24035338ed
@ -6,10 +6,11 @@ LOCAL_PATH:= $(call my-dir)
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include $(CLEAR_VARS)
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LOCAL_SRC_FILES:= \
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EGL/egl.cpp \
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EGL/hooks.cpp \
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EGL/Loader.cpp \
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LOCAL_SRC_FILES:= \
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EGL/egl.cpp \
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EGL/getProcAddress.cpp.arm \
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EGL/hooks.cpp \
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EGL/Loader.cpp \
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#
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LOCAL_SHARED_LIBRARIES += libcutils libutils
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@ -37,6 +37,8 @@
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#include <cutils/memory.h>
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#include <utils/SortedVector.h>
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#include <utils/KeyedVector.h>
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#include <utils/String8.h>
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#include "hooks.h"
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#include "egl_impl.h"
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@ -410,7 +412,11 @@ static const extention_map_t gExtentionMap[] = {
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(__eglMustCastToProperFunctionPointerType)&eglGetRenderBufferANDROID },
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};
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static extention_map_t gGLExtentionMap[MAX_NUMBER_OF_GL_EXTENSIONS];
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extern const __eglMustCastToProperFunctionPointerType gExtensionForwarders[MAX_NUMBER_OF_GL_EXTENSIONS];
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// accesses protected by gInitDriverMutex
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static DefaultKeyedVector<String8, __eglMustCastToProperFunctionPointerType> gGLExtentionMap;
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static int gGLExtentionSlot = 0;
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static void(*findProcAddress(const char* name,
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const extention_map_t* map, size_t n))()
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@ -1369,55 +1375,54 @@ __eglMustCastToProperFunctionPointerType eglGetProcAddress(const char *procname)
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addr = findProcAddress(procname, gExtentionMap, NELEM(gExtentionMap));
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if (addr) return addr;
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return NULL; // TODO: finish implementation below
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// this protects accesses to gGLExtentionMap and gGLExtentionSlot
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pthread_mutex_lock(&gInitDriverMutex);
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addr = findProcAddress(procname, gGLExtentionMap, NELEM(gGLExtentionMap));
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if (addr) return addr;
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addr = 0;
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int slot = -1;
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for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
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egl_connection_t* const cnx = &gEGLImpl[i];
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if (cnx->dso) {
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if (cnx->egl.eglGetProcAddress) {
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addr = cnx->egl.eglGetProcAddress(procname);
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if (addr) {
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if (slot == -1) {
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slot = 0; // XXX: find free slot
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if (slot == -1) {
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addr = 0;
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break;
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}
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}
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//cnx->hooks->ext.extensions[slot] = addr;
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/*
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* Since eglGetProcAddress() is not associated to anything, it needs
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* to return a function pointer that "works" regardless of what
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* the current context is.
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*
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* For this reason, we return a "forwarder", a small stub that takes
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* care of calling the function associated with the context
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* currently bound.
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*
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* We first look for extensions we've already resolved, if we're seeing
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* this extension for the first time, we go through all our
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* implementations and call eglGetProcAddress() and record the
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* result in the appropriate implementation hooks and return the
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* address of the forwarder corresponding to that hook set.
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*
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*/
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const String8 name(procname);
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addr = gGLExtentionMap.valueFor(name);
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const int slot = gGLExtentionSlot;
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LOGE_IF(slot >= MAX_NUMBER_OF_GL_EXTENSIONS,
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"no more slots for eglGetProcAddress(\"%s\")",
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procname);
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if (!addr && (slot < MAX_NUMBER_OF_GL_EXTENSIONS)) {
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bool found = false;
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for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
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egl_connection_t* const cnx = &gEGLImpl[i];
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if (cnx->dso && cnx->egl.eglGetProcAddress) {
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found = true;
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cnx->hooks[i]->ext.extensions[slot] =
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cnx->egl.eglGetProcAddress(procname);
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}
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}
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if (found) {
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addr = gExtensionForwarders[slot];
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gGLExtentionMap.add(name, addr);
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gGLExtentionSlot++;
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}
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}
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}
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if (slot >= 0) {
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addr = 0; // XXX: address of stub 'slot'
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gGLExtentionMap[slot].name = strdup(procname);
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gGLExtentionMap[slot].address = addr;
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}
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return addr;
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/*
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* TODO: For OpenGL ES extensions, we must generate a stub
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* that looks like
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* mov r12, #0xFFFF0FFF
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* ldr r12, [r12, #-15]
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* ldr r12, [r12, #TLS_SLOT_OPENGL_API*4]
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* mov r12, [r12, #api_offset]
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* ldrne pc, r12
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* mov pc, #unsupported_extension
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*
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* and write the address of the extension in *all*
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* gl_hooks_t::gl_ext_t at offset "api_offset" from gl_hooks_t
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*
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*/
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pthread_mutex_unlock(&gInitDriverMutex);
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return addr;
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}
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EGLBoolean eglSwapBuffers(EGLDisplay dpy, EGLSurface draw)
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176
opengl/libs/EGL/getProcAddress.cpp
Normal file
176
opengl/libs/EGL/getProcAddress.cpp
Normal file
@ -0,0 +1,176 @@
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/*
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** Copyright 2009, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#include <ctype.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <cutils/log.h>
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#include "hooks.h"
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// ----------------------------------------------------------------------------
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namespace android {
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// ----------------------------------------------------------------------------
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#undef API_ENTRY
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#undef CALL_GL_API
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#undef GL_EXTENSION
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#undef GL_EXTENSION_NAME
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#if defined(__arm__)
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#ifdef HAVE_ARM_TLS_REGISTER
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#define GET_TLS(reg) \
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"mrc p15, 0, " #reg ", c13, c0, 3 \n"
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#else
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#define GET_TLS(reg) \
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"mov " #reg ", #0xFFFF0FFF \n" \
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"ldr " #reg ", [" #reg ", #-15] \n"
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#endif
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#define API_ENTRY(_api) __attribute__((naked)) _api
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#define CALL_GL_EXTENSION_API(_api) \
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asm volatile( \
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GET_TLS(r12) \
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"ldr r12, [r12, %[tls]] \n" \
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"cmp r12, #0 \n" \
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"ldrne r12, [r12, %[api]] \n" \
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"cmpne r12, #0 \n" \
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"bxne r12 \n" \
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"bx lr \n" \
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: \
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: [tls] "J"(TLS_SLOT_OPENGL_API*4), \
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[api] "J"(__builtin_offsetof(gl_hooks_t, \
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ext.extensions[_api])) \
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: \
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);
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#define GL_EXTENSION_NAME(_n) __glExtFwd##_n
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#define GL_EXTENSION(_n) \
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void API_ENTRY(GL_EXTENSION_NAME(_n))() { \
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CALL_GL_EXTENSION_API(_n); \
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}
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#else
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#define GL_EXTENSION_NAME(_n) NULL
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#define GL_EXTENSION(_n)
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#warning "eglGetProcAddress() partially supported on this architecture"
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#endif
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GL_EXTENSION(0)
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GL_EXTENSION(1)
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GL_EXTENSION(2)
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GL_EXTENSION(3)
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GL_EXTENSION(4)
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GL_EXTENSION(5)
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GL_EXTENSION(6)
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GL_EXTENSION(7)
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GL_EXTENSION(8)
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GL_EXTENSION(9)
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GL_EXTENSION(10)
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GL_EXTENSION(11)
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GL_EXTENSION(12)
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GL_EXTENSION(13)
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GL_EXTENSION(14)
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GL_EXTENSION(15)
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GL_EXTENSION(16)
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GL_EXTENSION(17)
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GL_EXTENSION(18)
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GL_EXTENSION(19)
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GL_EXTENSION(20)
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GL_EXTENSION(21)
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GL_EXTENSION(22)
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GL_EXTENSION(23)
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GL_EXTENSION(24)
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GL_EXTENSION(25)
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GL_EXTENSION(26)
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GL_EXTENSION(27)
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GL_EXTENSION(28)
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GL_EXTENSION(29)
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GL_EXTENSION(30)
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GL_EXTENSION(31)
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GL_EXTENSION(32)
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GL_EXTENSION(33)
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GL_EXTENSION(34)
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GL_EXTENSION(35)
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GL_EXTENSION(36)
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GL_EXTENSION(37)
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GL_EXTENSION(38)
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GL_EXTENSION(39)
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GL_EXTENSION(40)
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GL_EXTENSION(41)
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GL_EXTENSION(42)
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GL_EXTENSION(43)
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GL_EXTENSION(44)
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GL_EXTENSION(45)
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GL_EXTENSION(46)
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GL_EXTENSION(47)
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GL_EXTENSION(48)
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GL_EXTENSION(49)
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GL_EXTENSION(50)
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GL_EXTENSION(51)
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GL_EXTENSION(52)
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GL_EXTENSION(53)
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GL_EXTENSION(54)
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GL_EXTENSION(55)
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GL_EXTENSION(56)
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GL_EXTENSION(57)
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GL_EXTENSION(58)
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GL_EXTENSION(59)
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GL_EXTENSION(60)
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GL_EXTENSION(61)
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GL_EXTENSION(62)
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GL_EXTENSION(63)
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extern const __eglMustCastToProperFunctionPointerType gExtensionForwarders[MAX_NUMBER_OF_GL_EXTENSIONS] = {
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GL_EXTENSION_NAME(0), GL_EXTENSION_NAME(1), GL_EXTENSION_NAME(2), GL_EXTENSION_NAME(3),
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GL_EXTENSION_NAME(4), GL_EXTENSION_NAME(5), GL_EXTENSION_NAME(6), GL_EXTENSION_NAME(7),
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GL_EXTENSION_NAME(8), GL_EXTENSION_NAME(9), GL_EXTENSION_NAME(10), GL_EXTENSION_NAME(11),
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GL_EXTENSION_NAME(12), GL_EXTENSION_NAME(13), GL_EXTENSION_NAME(14), GL_EXTENSION_NAME(15),
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GL_EXTENSION_NAME(16), GL_EXTENSION_NAME(17), GL_EXTENSION_NAME(18), GL_EXTENSION_NAME(19),
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GL_EXTENSION_NAME(20), GL_EXTENSION_NAME(21), GL_EXTENSION_NAME(22), GL_EXTENSION_NAME(23),
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GL_EXTENSION_NAME(24), GL_EXTENSION_NAME(25), GL_EXTENSION_NAME(26), GL_EXTENSION_NAME(27),
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GL_EXTENSION_NAME(28), GL_EXTENSION_NAME(29), GL_EXTENSION_NAME(30), GL_EXTENSION_NAME(31),
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GL_EXTENSION_NAME(32), GL_EXTENSION_NAME(33), GL_EXTENSION_NAME(34), GL_EXTENSION_NAME(35),
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GL_EXTENSION_NAME(36), GL_EXTENSION_NAME(37), GL_EXTENSION_NAME(38), GL_EXTENSION_NAME(39),
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GL_EXTENSION_NAME(40), GL_EXTENSION_NAME(41), GL_EXTENSION_NAME(42), GL_EXTENSION_NAME(43),
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GL_EXTENSION_NAME(44), GL_EXTENSION_NAME(45), GL_EXTENSION_NAME(46), GL_EXTENSION_NAME(47),
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GL_EXTENSION_NAME(48), GL_EXTENSION_NAME(49), GL_EXTENSION_NAME(50), GL_EXTENSION_NAME(51),
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GL_EXTENSION_NAME(52), GL_EXTENSION_NAME(53), GL_EXTENSION_NAME(54), GL_EXTENSION_NAME(55),
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GL_EXTENSION_NAME(56), GL_EXTENSION_NAME(57), GL_EXTENSION_NAME(58), GL_EXTENSION_NAME(59),
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GL_EXTENSION_NAME(60), GL_EXTENSION_NAME(61), GL_EXTENSION_NAME(62), GL_EXTENSION_NAME(63)
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};
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#undef GL_EXTENSION_NAME
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#undef GL_EXTENSION
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#undef API_ENTRY
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#undef CALL_GL_API
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// ----------------------------------------------------------------------------
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}; // namespace android
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// ----------------------------------------------------------------------------
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@ -37,7 +37,7 @@
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#endif
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#undef NELEM
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#define NELEM(x) (sizeof(x)/sizeof(*(x)))
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#define MAX_NUMBER_OF_GL_EXTENSIONS 32
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#define MAX_NUMBER_OF_GL_EXTENSIONS 64
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#if defined(HAVE_ANDROID_OS) && !USE_SLOW_BINDING && __OPTIMIZE__
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@ -86,7 +86,7 @@ struct gl_hooks_t {
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#include "entries.in"
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} gl;
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struct gl_ext_t {
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void (*extensions[MAX_NUMBER_OF_GL_EXTENSIONS])(void);
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__eglMustCastToProperFunctionPointerType extensions[MAX_NUMBER_OF_GL_EXTENSIONS];
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} ext;
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};
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#undef GL_ENTRY
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