diff options
Diffstat (limited to 'emulator/opengl/system/gralloc/gralloc.cpp')
| -rw-r--r-- | emulator/opengl/system/gralloc/gralloc.cpp | 831 |
1 files changed, 831 insertions, 0 deletions
diff --git a/emulator/opengl/system/gralloc/gralloc.cpp b/emulator/opengl/system/gralloc/gralloc.cpp new file mode 100644 index 0000000..baad99b --- /dev/null +++ b/emulator/opengl/system/gralloc/gralloc.cpp @@ -0,0 +1,831 @@ +/* +* Copyright (C) 2011 The Android Open Source Project +* +* Licensed under the Apache License, Version 2.0 (the "License"); +* you may not use this file except in compliance with the License. +* You may obtain a copy of the License at +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +*/ +#include <string.h> +#include <pthread.h> +#ifdef HAVE_ANDROID_OS // just want PAGE_SIZE define +# include <asm/page.h> +#else +# include <sys/user.h> +#endif +#include <cutils/ashmem.h> +#include <unistd.h> +#include <errno.h> +#include <dlfcn.h> +#include <sys/mman.h> +#include "gralloc_cb.h" +#include "HostConnection.h" +#include "glUtils.h" +#include <cutils/log.h> +#include <cutils/properties.h> + +/* Set to 1 or 2 to enable debug traces */ +#define DEBUG 0 + +#if DEBUG >= 1 +# define D(...) ALOGD(__VA_ARGS__) +#else +# define D(...) ((void)0) +#endif + +#if DEBUG >= 2 +# define DD(...) ALOGD(__VA_ARGS__) +#else +# define DD(...) ((void)0) +#endif + +#define DBG_FUNC DBG("%s\n", __FUNCTION__) +// +// our private gralloc module structure +// +struct private_module_t { + gralloc_module_t base; +}; + +/* If not NULL, this is a pointer to the fallback module. + * This really is gralloc.default, which we'll use if we detect + * that the emulator we're running in does not support GPU emulation. + */ +static gralloc_module_t* sFallback; +static pthread_once_t sFallbackOnce = PTHREAD_ONCE_INIT; + +static void fallback_init(void); // forward + + +typedef struct _alloc_list_node { + buffer_handle_t handle; + _alloc_list_node *next; + _alloc_list_node *prev; +} AllocListNode; + +// +// Our gralloc device structure (alloc interface) +// +struct gralloc_device_t { + alloc_device_t device; + + AllocListNode *allocListHead; // double linked list of allocated buffers + pthread_mutex_t lock; +}; + +// +// Our framebuffer device structure +// +struct fb_device_t { + framebuffer_device_t device; +}; + +static int map_buffer(cb_handle_t *cb, void **vaddr) +{ + if (cb->fd < 0 || cb->ashmemSize <= 0) { + return -EINVAL; + } + + void *addr = mmap(0, cb->ashmemSize, PROT_READ | PROT_WRITE, + MAP_SHARED, cb->fd, 0); + if (addr == MAP_FAILED) { + return -errno; + } + + cb->ashmemBase = intptr_t(addr); + cb->ashmemBasePid = getpid(); + + *vaddr = addr; + return 0; +} + +#define DEFINE_HOST_CONNECTION \ + HostConnection *hostCon = HostConnection::get(); \ + renderControl_encoder_context_t *rcEnc = (hostCon ? hostCon->rcEncoder() : NULL) + +#define DEFINE_AND_VALIDATE_HOST_CONNECTION \ + HostConnection *hostCon = HostConnection::get(); \ + if (!hostCon) { \ + ALOGE("gralloc: Failed to get host connection\n"); \ + return -EIO; \ + } \ + renderControl_encoder_context_t *rcEnc = hostCon->rcEncoder(); \ + if (!rcEnc) { \ + ALOGE("gralloc: Failed to get renderControl encoder context\n"); \ + return -EIO; \ + } + + +// +// gralloc device functions (alloc interface) +// +static int gralloc_alloc(alloc_device_t* dev, + int w, int h, int format, int usage, + buffer_handle_t* pHandle, int* pStride) +{ + D("gralloc_alloc w=%d h=%d usage=0x%x\n", w, h, usage); + + gralloc_device_t *grdev = (gralloc_device_t *)dev; + if (!grdev || !pHandle || !pStride) + return -EINVAL; + + // + // Validate usage: buffer cannot be written both by s/w and h/w access. + // + bool sw_write = (0 != (usage & GRALLOC_USAGE_SW_WRITE_MASK)); + bool hw_write = (usage & GRALLOC_USAGE_HW_RENDER); + if (hw_write && sw_write) { + return -EINVAL; + } + + int ashmem_size = 0; + *pStride = 0; + GLenum glFormat = 0; + GLenum glType = 0; + + int bpp = 0; + switch (format) { + case HAL_PIXEL_FORMAT_RGBA_8888: + case HAL_PIXEL_FORMAT_RGBX_8888: + case HAL_PIXEL_FORMAT_BGRA_8888: + bpp = 4; + glFormat = GL_RGBA; + glType = GL_UNSIGNED_BYTE; + break; + case HAL_PIXEL_FORMAT_RGB_888: + bpp = 3; + glFormat = GL_RGB; + glType = GL_UNSIGNED_BYTE; + break; + case HAL_PIXEL_FORMAT_RGB_565: + bpp = 2; + glFormat = GL_RGB; + glType = GL_UNSIGNED_SHORT_5_6_5; + break; + case HAL_PIXEL_FORMAT_RGBA_5551: + bpp = 2; + glFormat = GL_RGB5_A1_OES; + glType = GL_UNSIGNED_SHORT_5_5_5_1; + break; + case HAL_PIXEL_FORMAT_RGBA_4444: + bpp = 2; + glFormat = GL_RGBA4_OES; + glType = GL_UNSIGNED_SHORT_4_4_4_4; + break; + + default: + return -EINVAL; + } + + if (usage & GRALLOC_USAGE_HW_FB) { + // keep space for postCounter + ashmem_size += sizeof(uint32_t); + } + + if (usage & (GRALLOC_USAGE_SW_READ_MASK | GRALLOC_USAGE_SW_WRITE_MASK)) { + // keep space for image on guest memory if SW access is needed + int align = 1; + size_t bpr = (w*bpp + (align-1)) & ~(align-1); + ashmem_size += (bpr * h); + *pStride = bpr / bpp; + } + + D("gralloc_alloc ashmem_size=%d, tid %d\n", ashmem_size, gettid()); + + // + // Allocate space in ashmem if needed + // + int fd = -1; + if (ashmem_size > 0) { + // round to page size; + ashmem_size = (ashmem_size + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1); + + fd = ashmem_create_region("gralloc-buffer", ashmem_size); + if (fd < 0) { + ALOGE("gralloc_alloc failed to create ashmem region: %s\n", strerror(errno)); + return -errno; + } + } + + cb_handle_t *cb = new cb_handle_t(fd, ashmem_size, usage, + w, h, glFormat, glType); + + if (ashmem_size > 0) { + // + // map ashmem region if exist + // + void *vaddr; + int err = map_buffer(cb, &vaddr); + if (err) { + close(fd); + delete cb; + return err; + } + + cb->setFd(fd); + } + + // + // Allocate ColorBuffer handle on the host (only if h/w access is allowed) + // + if (usage & GRALLOC_USAGE_HW_MASK) { + DEFINE_HOST_CONNECTION; + if (hostCon && rcEnc) { + cb->hostHandle = rcEnc->rcCreateColorBuffer(rcEnc, w, h, glFormat); + D("Created host ColorBuffer 0x%x\n", cb->hostHandle); + } + + if (!cb->hostHandle) { + // Could not create colorbuffer on host !!! + close(fd); + delete cb; + return -EIO; + } + } + + // + // alloc succeeded - insert the allocated handle to the allocated list + // + AllocListNode *node = new AllocListNode(); + pthread_mutex_lock(&grdev->lock); + node->handle = cb; + node->next = grdev->allocListHead; + node->prev = NULL; + if (grdev->allocListHead) { + grdev->allocListHead->prev = node; + } + grdev->allocListHead = node; + pthread_mutex_unlock(&grdev->lock); + + *pHandle = cb; + return 0; +} + +static int gralloc_free(alloc_device_t* dev, + buffer_handle_t handle) +{ + const cb_handle_t *cb = (const cb_handle_t *)handle; + if (!cb_handle_t::validate((cb_handle_t*)cb)) { + ERR("gralloc_free: invalid handle"); + return -EINVAL; + } + + if (cb->hostHandle != 0) { + DEFINE_AND_VALIDATE_HOST_CONNECTION; + D("Closing host ColorBuffer 0x%x\n", cb->hostHandle); + rcEnc->rcCloseColorBuffer(rcEnc, cb->hostHandle); + } + + // + // detach and unmap ashmem area if present + // + if (cb->fd > 0) { + if (cb->ashmemSize > 0 && cb->ashmemBase) { + munmap((void *)cb->ashmemBase, cb->ashmemSize); + } + close(cb->fd); + } + + // remove it from the allocated list + gralloc_device_t *grdev = (gralloc_device_t *)dev; + pthread_mutex_lock(&grdev->lock); + AllocListNode *n = grdev->allocListHead; + while( n && n->handle != cb ) { + n = n->next; + } + if (n) { + // buffer found on list - remove it from list + if (n->next) { + n->next->prev = n->prev; + } + if (n->prev) { + n->prev->next = n->next; + } + else { + grdev->allocListHead = n->next; + } + + delete n; + } + pthread_mutex_unlock(&grdev->lock); + + delete cb; + + return 0; +} + +static int gralloc_device_close(struct hw_device_t *dev) +{ + gralloc_device_t* d = reinterpret_cast<gralloc_device_t*>(dev); + if (d) { + + // free still allocated buffers + while( d->allocListHead != NULL ) { + gralloc_free(&d->device, d->allocListHead->handle); + } + + // free device + free(d); + } + return 0; +} + +static int fb_compositionComplete(struct framebuffer_device_t* dev) +{ + return 0; +} + +// +// Framebuffer device functions +// +static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer) +{ + fb_device_t *fbdev = (fb_device_t *)dev; + cb_handle_t *cb = (cb_handle_t *)buffer; + + if (!fbdev || !cb_handle_t::validate(cb) || !cb->canBePosted()) { + return -EINVAL; + } + + // Make sure we have host connection + DEFINE_AND_VALIDATE_HOST_CONNECTION; + + // increment the post count of the buffer + uint32_t *postCountPtr = (uint32_t *)cb->ashmemBase; + if (!postCountPtr) { + // This should not happen + return -EINVAL; + } + (*postCountPtr)++; + + // send post request to host + rcEnc->rcFBPost(rcEnc, cb->hostHandle); + hostCon->flush(); + + return 0; +} + +static int fb_setUpdateRect(struct framebuffer_device_t* dev, + int l, int t, int w, int h) +{ + fb_device_t *fbdev = (fb_device_t *)dev; + + if (!fbdev) { + return -EINVAL; + } + + // Make sure we have host connection + DEFINE_AND_VALIDATE_HOST_CONNECTION; + + // send request to host + // TODO: XXX - should be implemented + //rcEnc->rc_XXX + + return 0; +} + +static int fb_setSwapInterval(struct framebuffer_device_t* dev, + int interval) +{ + fb_device_t *fbdev = (fb_device_t *)dev; + + if (!fbdev) { + return -EINVAL; + } + + // Make sure we have host connection + DEFINE_AND_VALIDATE_HOST_CONNECTION; + + // send request to host + rcEnc->rcFBSetSwapInterval(rcEnc, interval); + hostCon->flush(); + + return 0; +} + +static int fb_close(struct hw_device_t *dev) +{ + fb_device_t *fbdev = (fb_device_t *)dev; + + delete fbdev; + + return 0; +} + + +// +// gralloc module functions - refcount + locking interface +// +static int gralloc_register_buffer(gralloc_module_t const* module, + buffer_handle_t handle) +{ + pthread_once(&sFallbackOnce, fallback_init); + if (sFallback != NULL) { + return sFallback->registerBuffer(sFallback, handle); + } + + D("gralloc_register_buffer(%p) called", handle); + + private_module_t *gr = (private_module_t *)module; + cb_handle_t *cb = (cb_handle_t *)handle; + if (!gr || !cb_handle_t::validate(cb)) { + ERR("gralloc_register_buffer(%p): invalid buffer", cb); + return -EINVAL; + } + + if (cb->hostHandle != 0) { + DEFINE_AND_VALIDATE_HOST_CONNECTION; + D("Opening host ColorBuffer 0x%x\n", cb->hostHandle); + rcEnc->rcOpenColorBuffer(rcEnc, cb->hostHandle); + } + + // + // if the color buffer has ashmem region and it is not mapped in this + // process map it now. + // + if (cb->ashmemSize > 0 && cb->mappedPid != getpid()) { + void *vaddr; + int err = map_buffer(cb, &vaddr); + if (err) { + ERR("gralloc_register_buffer(%p): map failed: %s", cb, strerror(-err)); + return -err; + } + cb->mappedPid = getpid(); + } + + return 0; +} + +static int gralloc_unregister_buffer(gralloc_module_t const* module, + buffer_handle_t handle) +{ + if (sFallback != NULL) { + return sFallback->unregisterBuffer(sFallback, handle); + } + + private_module_t *gr = (private_module_t *)module; + cb_handle_t *cb = (cb_handle_t *)handle; + if (!gr || !cb_handle_t::validate(cb)) { + ERR("gralloc_unregister_buffer(%p): invalid buffer", cb); + return -EINVAL; + } + + if (cb->hostHandle != 0) { + DEFINE_AND_VALIDATE_HOST_CONNECTION; + D("Closing host ColorBuffer 0x%x\n", cb->hostHandle); + rcEnc->rcCloseColorBuffer(rcEnc, cb->hostHandle); + } + + // + // unmap ashmem region if it was previously mapped in this process + // (through register_buffer) + // + if (cb->ashmemSize > 0 && cb->mappedPid == getpid()) { + void *vaddr; + int err = munmap((void *)cb->ashmemBase, cb->ashmemSize); + if (err) { + ERR("gralloc_unregister_buffer(%p): unmap failed", cb); + return -EINVAL; + } + cb->ashmemBase = NULL; + cb->mappedPid = 0; + } + + D("gralloc_unregister_buffer(%p) done\n", cb); + + return 0; +} + +static int gralloc_lock(gralloc_module_t const* module, + buffer_handle_t handle, int usage, + int l, int t, int w, int h, + void** vaddr) +{ + if (sFallback != NULL) { + return sFallback->lock(sFallback, handle, usage, l, t, w, h, vaddr); + } + + private_module_t *gr = (private_module_t *)module; + cb_handle_t *cb = (cb_handle_t *)handle; + if (!gr || !cb_handle_t::validate(cb)) { + ALOGE("gralloc_lock bad handle\n"); + return -EINVAL; + } + + // Validate usage, + // 1. cannot be locked for hw access + // 2. lock for either sw read or write. + // 3. locked sw access must match usage during alloc time. + bool sw_read = (0 != (usage & GRALLOC_USAGE_SW_READ_MASK)); + bool sw_write = (0 != (usage & GRALLOC_USAGE_SW_WRITE_MASK)); + bool hw_read = (usage & GRALLOC_USAGE_HW_TEXTURE); + bool hw_write = (usage & GRALLOC_USAGE_HW_RENDER); + bool sw_read_allowed = (0 != (cb->usage & GRALLOC_USAGE_SW_READ_MASK)); + bool sw_write_allowed = (0 != (cb->usage & GRALLOC_USAGE_SW_WRITE_MASK)); + + if ( (hw_read || hw_write) || + (!sw_read && !sw_write) || + (sw_read && !sw_read_allowed) || + (sw_write && !sw_write_allowed) ) { + ALOGE("gralloc_lock usage mismatch usage=0x%x cb->usage=0x%x\n", usage, cb->usage); + return -EINVAL; + } + + EGLint postCount = 0; + void *cpu_addr = NULL; + + // + // make sure ashmem area is mapped if needed + // + if (cb->canBePosted() || sw_read || sw_write) { + if (cb->ashmemBasePid != getpid() || !cb->ashmemBase) { + return -EACCES; + } + + if (cb->canBePosted()) { + postCount = *((int *)cb->ashmemBase); + cpu_addr = (void *)(cb->ashmemBase + sizeof(int)); + } + else { + cpu_addr = (void *)(cb->ashmemBase); + } + } + + if (cb->hostHandle) { + // Make sure we have host connection + DEFINE_AND_VALIDATE_HOST_CONNECTION; + + // + // flush color buffer write cache on host and get its sync status. + // + int hostSyncStatus = rcEnc->rcColorBufferCacheFlush(rcEnc, cb->hostHandle, + postCount, + sw_read); + if (hostSyncStatus < 0) { + // host failed the color buffer sync - probably since it was already + // locked for write access. fail the lock. + ALOGE("gralloc_lock cacheFlush failed postCount=%d sw_read=%d\n", + postCount, sw_read); + return -EBUSY; + } + + // + // is virtual address required ? + // + if (sw_read || sw_write) { + *vaddr = cpu_addr; + } + } + + if (sw_write) { + // + // Keep locked region if locked for s/w write access. + // + cb->lockedLeft = l; + cb->lockedTop = t; + cb->lockedWidth = w; + cb->lockedHeight = h; + } + + return 0; +} + +static int gralloc_unlock(gralloc_module_t const* module, + buffer_handle_t handle) +{ + if (sFallback != NULL) { + return sFallback->unlock(sFallback, handle); + } + + private_module_t *gr = (private_module_t *)module; + cb_handle_t *cb = (cb_handle_t *)handle; + if (!gr || !cb_handle_t::validate(cb)) { + return -EINVAL; + } + + // + // if buffer was locked for s/w write, we need to update the host with + // the updated data + // + if (cb->lockedWidth > 0 && cb->lockedHeight > 0 && cb->hostHandle) { + + // Make sure we have host connection + DEFINE_AND_VALIDATE_HOST_CONNECTION; + + void *cpu_addr; + if (cb->canBePosted()) { + cpu_addr = (void *)(cb->ashmemBase + sizeof(int)); + } + else { + cpu_addr = (void *)(cb->ashmemBase); + } + + if (cb->lockedWidth < cb->width || cb->lockedHeight < cb->height) { + int bpp = glUtilsPixelBitSize(cb->glFormat, cb->glType) >> 3; + char *tmpBuf = new char[cb->lockedWidth * cb->lockedHeight * bpp]; + + int dst_line_len = cb->lockedWidth * bpp; + int src_line_len = cb->width * bpp; + char *src = (char *)cpu_addr + cb->lockedTop*src_line_len + cb->lockedLeft*bpp; + char *dst = tmpBuf; + for (int y=0; y<cb->lockedHeight; y++) { + memcpy(dst, src, dst_line_len); + src += src_line_len; + dst += dst_line_len; + } + + rcEnc->rcUpdateColorBuffer(rcEnc, cb->hostHandle, + cb->lockedLeft, cb->lockedTop, + cb->lockedWidth, cb->lockedHeight, + cb->glFormat, cb->glType, + tmpBuf); + + delete [] tmpBuf; + } + else { + rcEnc->rcUpdateColorBuffer(rcEnc, cb->hostHandle, 0, 0, + cb->width, cb->height, + cb->glFormat, cb->glType, + cpu_addr); + } + } + + cb->lockedWidth = cb->lockedHeight = 0; + return 0; +} + + +static int gralloc_device_open(const hw_module_t* module, + const char* name, + hw_device_t** device) +{ + int status = -EINVAL; + + D("gralloc_device_open %s\n", name); + + pthread_once( &sFallbackOnce, fallback_init ); + if (sFallback != NULL) { + return sFallback->common.methods->open(&sFallback->common, name, device); + } + + if (!strcmp(name, GRALLOC_HARDWARE_GPU0)) { + + // Create host connection and keep it in the TLS. + // return error if connection with host can not be established + HostConnection *hostCon = HostConnection::get(); + if (!hostCon) { + ALOGE("gralloc: failed to get host connection while opening %s\n", name); + return -EIO; + } + + // + // Allocate memory for the gralloc device (alloc interface) + // + gralloc_device_t *dev; + dev = (gralloc_device_t*)malloc(sizeof(gralloc_device_t)); + if (NULL == dev) { + return -ENOMEM; + } + + // Initialize our device structure + // + dev->device.common.tag = HARDWARE_DEVICE_TAG; + dev->device.common.version = 0; + dev->device.common.module = const_cast<hw_module_t*>(module); + dev->device.common.close = gralloc_device_close; + + dev->device.alloc = gralloc_alloc; + dev->device.free = gralloc_free; + dev->allocListHead = NULL; + pthread_mutex_init(&dev->lock, NULL); + + *device = &dev->device.common; + status = 0; + } + else if (!strcmp(name, GRALLOC_HARDWARE_FB0)) { + + // return error if connection with host can not be established + DEFINE_AND_VALIDATE_HOST_CONNECTION; + + // + // Query the host for Framebuffer attributes + // + D("gralloc: query Frabuffer attribs\n"); + EGLint width = rcEnc->rcGetFBParam(rcEnc, FB_WIDTH); + D("gralloc: width=%d\n", width); + EGLint height = rcEnc->rcGetFBParam(rcEnc, FB_HEIGHT); + D("gralloc: height=%d\n", height); + EGLint xdpi = rcEnc->rcGetFBParam(rcEnc, FB_XDPI); + D("gralloc: xdpi=%d\n", xdpi); + EGLint ydpi = rcEnc->rcGetFBParam(rcEnc, FB_YDPI); + D("gralloc: ydpi=%d\n", ydpi); + EGLint fps = rcEnc->rcGetFBParam(rcEnc, FB_FPS); + D("gralloc: fps=%d\n", fps); + EGLint min_si = rcEnc->rcGetFBParam(rcEnc, FB_MIN_SWAP_INTERVAL); + D("gralloc: min_swap=%d\n", min_si); + EGLint max_si = rcEnc->rcGetFBParam(rcEnc, FB_MAX_SWAP_INTERVAL); + D("gralloc: max_swap=%d\n", max_si); + + // + // Allocate memory for the framebuffer device + // + fb_device_t *dev; + dev = (fb_device_t*)malloc(sizeof(fb_device_t)); + if (NULL == dev) { + return -ENOMEM; + } + memset(dev, 0, sizeof(fb_device_t)); + + // Initialize our device structure + // + dev->device.common.tag = HARDWARE_DEVICE_TAG; + dev->device.common.version = 0; + dev->device.common.module = const_cast<hw_module_t*>(module); + dev->device.common.close = fb_close; + dev->device.setSwapInterval = fb_setSwapInterval; + dev->device.post = fb_post; + dev->device.setUpdateRect = 0; //fb_setUpdateRect; + dev->device.compositionComplete = fb_compositionComplete; //XXX: this is a dummy + + const_cast<uint32_t&>(dev->device.flags) = 0; + const_cast<uint32_t&>(dev->device.width) = width; + const_cast<uint32_t&>(dev->device.height) = height; + const_cast<int&>(dev->device.stride) = width; + const_cast<int&>(dev->device.format) = HAL_PIXEL_FORMAT_RGBA_8888; + const_cast<float&>(dev->device.xdpi) = xdpi; + const_cast<float&>(dev->device.ydpi) = ydpi; + const_cast<float&>(dev->device.fps) = fps; + const_cast<int&>(dev->device.minSwapInterval) = min_si; + const_cast<int&>(dev->device.maxSwapInterval) = max_si; + *device = &dev->device.common; + + status = 0; + } + + return status; +} + +// +// define the HMI symbol - our module interface +// +static struct hw_module_methods_t gralloc_module_methods = { + open: gralloc_device_open +}; + +struct private_module_t HAL_MODULE_INFO_SYM = { + base: { + common: { + tag: HARDWARE_MODULE_TAG, + version_major: 1, + version_minor: 0, + id: GRALLOC_HARDWARE_MODULE_ID, + name: "Graphics Memory Allocator Module", + author: "The Android Open Source Project", + methods: &gralloc_module_methods, + dso: NULL, + reserved: {0, } + }, + registerBuffer: gralloc_register_buffer, + unregisterBuffer: gralloc_unregister_buffer, + lock: gralloc_lock, + unlock: gralloc_unlock, + perform: NULL, + reserved_proc : {NULL, } + } +}; + +/* This function is called once to detect whether the emulator supports + * GPU emulation (this is done by looking at the qemu.gles kernel + * parameter, which must be > 0 if this is the case). + * + * If not, then load gralloc.default instead as a fallback. + */ +static void +fallback_init(void) +{ + char prop[PROPERTY_VALUE_MAX]; + void* module; + + property_get("ro.kernel.qemu.gles", prop, "0"); + if (atoi(prop) > 0) { + return; + } + ALOGD("Emulator without GPU emulation detected."); + module = dlopen("/system/lib/hw/gralloc.default.so", RTLD_LAZY|RTLD_LOCAL); + if (module != NULL) { + sFallback = reinterpret_cast<gralloc_module_t*>(dlsym(module, HAL_MODULE_INFO_SYM_AS_STR)); + if (sFallback == NULL) { + dlclose(module); + } + } + if (sFallback == NULL) { + ALOGE("Could not find software fallback module!?"); + } +} |