FramebufferNativeWindow.cpp revision b2fd4665e66fe81969f1f07fd724c6f68dd8f7f1
1/* 2** 3** Copyright 2007 The Android Open Source Project 4** 5** Licensed under the Apache License Version 2.0(the "License"); 6** you may not use this file except in compliance with the License. 7** You may obtain a copy of the License at 8** 9** http://www.apache.org/licenses/LICENSE-2.0 10** 11** Unless required by applicable law or agreed to in writing software 12** distributed under the License is distributed on an "AS IS" BASIS 13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND either express or implied. 14** See the License for the specific language governing permissions and 15** limitations under the License. 16*/ 17 18#define LOG_TAG "FramebufferNativeWindow" 19 20#include <stdlib.h> 21#include <stdio.h> 22#include <string.h> 23#include <errno.h> 24 25#include <cutils/log.h> 26#include <cutils/atomic.h> 27#include <utils/threads.h> 28#include <utils/RefBase.h> 29 30#include <ui/SurfaceComposerClient.h> 31#include <ui/Rect.h> 32#include <ui/FramebufferNativeWindow.h> 33 34#include <EGL/egl.h> 35 36#include <pixelflinger/format.h> 37#include <pixelflinger/pixelflinger.h> 38 39#include <hardware/hardware.h> 40#include <hardware/gralloc.h> 41 42#include <private/ui/android_natives_priv.h> 43 44// ---------------------------------------------------------------------------- 45namespace android { 46// ---------------------------------------------------------------------------- 47 48class NativeBuffer 49 : public EGLNativeBase< 50 android_native_buffer_t, 51 NativeBuffer, 52 LightRefBase<NativeBuffer> > 53{ 54public: 55 NativeBuffer(int w, int h, int f, int u) : BASE() { 56 android_native_buffer_t::width = w; 57 android_native_buffer_t::height = h; 58 android_native_buffer_t::format = f; 59 android_native_buffer_t::usage = u; 60 } 61private: 62 friend class LightRefBase<NativeBuffer>; 63 ~NativeBuffer() { }; // this class cannot be overloaded 64}; 65 66 67/* 68 * This implements the (main) framebuffer management. This class is used 69 * mostly by SurfaceFlinger, but also by command line GL application. 70 * 71 * In fact this is an implementation of android_native_window_t on top of 72 * the framebuffer. 73 * 74 * Currently it is pretty simple, it manages only two buffers (the front and 75 * back buffer). 76 * 77 */ 78 79FramebufferNativeWindow::FramebufferNativeWindow() 80 : BASE(), fbDev(0), grDev(0), mUpdateOnDemand(false) 81{ 82 hw_module_t const* module; 83 if (hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module) == 0) { 84 int stride; 85 int err; 86 err = framebuffer_open(module, &fbDev); 87 LOGE_IF(err, "couldn't open framebuffer HAL (%s)", strerror(-err)); 88 89 err = gralloc_open(module, &grDev); 90 LOGE_IF(err, "couldn't open gralloc HAL (%s)", strerror(-err)); 91 92 // bail out if we can't initialize the modules 93 if (!fbDev || !grDev) 94 return; 95 96 mUpdateOnDemand = (fbDev->setUpdateRect != 0); 97 98 // initialize the buffer FIFO 99 mNumBuffers = 2; 100 mNumFreeBuffers = 2; 101 mBufferHead = mNumBuffers-1; 102 buffers[0] = new NativeBuffer( 103 fbDev->width, fbDev->height, fbDev->format, GRALLOC_USAGE_HW_FB); 104 buffers[1] = new NativeBuffer( 105 fbDev->width, fbDev->height, fbDev->format, GRALLOC_USAGE_HW_FB); 106 107 err = grDev->alloc(grDev, 108 fbDev->width, fbDev->height, fbDev->format, 109 GRALLOC_USAGE_HW_FB, &buffers[0]->handle, &buffers[0]->stride); 110 111 LOGE_IF(err, "fb buffer 0 allocation failed w=%d, h=%d, err=%s", 112 fbDev->width, fbDev->height, strerror(-err)); 113 114 err = grDev->alloc(grDev, 115 fbDev->width, fbDev->height, fbDev->format, 116 GRALLOC_USAGE_HW_FB, &buffers[1]->handle, &buffers[1]->stride); 117 118 LOGE_IF(err, "fb buffer 1 allocation failed w=%d, h=%d, err=%s", 119 fbDev->width, fbDev->height, strerror(-err)); 120 } 121 122 const_cast<uint32_t&>(android_native_window_t::flags) = fbDev->flags; 123 const_cast<float&>(android_native_window_t::xdpi) = fbDev->xdpi; 124 const_cast<float&>(android_native_window_t::ydpi) = fbDev->ydpi; 125 const_cast<int&>(android_native_window_t::minSwapInterval) = 126 fbDev->minSwapInterval; 127 const_cast<int&>(android_native_window_t::maxSwapInterval) = 128 fbDev->maxSwapInterval; 129 130 android_native_window_t::setSwapInterval = setSwapInterval; 131 android_native_window_t::dequeueBuffer = dequeueBuffer; 132 android_native_window_t::lockBuffer = lockBuffer; 133 android_native_window_t::queueBuffer = queueBuffer; 134 android_native_window_t::query = query; 135} 136 137FramebufferNativeWindow::~FramebufferNativeWindow() 138{ 139 if (grDev) { 140 if (buffers[0] != NULL) 141 grDev->free(grDev, buffers[0]->handle); 142 if (buffers[1] != NULL) 143 grDev->free(grDev, buffers[1]->handle); 144 gralloc_close(grDev); 145 } 146 147 if (fbDev) { 148 framebuffer_close(fbDev); 149 } 150} 151 152status_t FramebufferNativeWindow::setUpdateRectangle(const Rect& r) 153{ 154 if (!mUpdateOnDemand) { 155 return INVALID_OPERATION; 156 } 157 return fbDev->setUpdateRect(fbDev, r.left, r.top, r.width(), r.height()); 158} 159 160int FramebufferNativeWindow::setSwapInterval( 161 android_native_window_t* window, int interval) 162{ 163 framebuffer_device_t* fb = getSelf(window)->fbDev; 164 return fb->setSwapInterval(fb, interval); 165} 166 167int FramebufferNativeWindow::dequeueBuffer(android_native_window_t* window, 168 android_native_buffer_t** buffer) 169{ 170 FramebufferNativeWindow* self = getSelf(window); 171 Mutex::Autolock _l(self->mutex); 172 framebuffer_device_t* fb = self->fbDev; 173 174 // wait for a free buffer 175 while (!self->mNumFreeBuffers) { 176 self->mCondition.wait(self->mutex); 177 } 178 // get this buffer 179 self->mNumFreeBuffers--; 180 int index = self->mBufferHead++; 181 if (self->mBufferHead >= self->mNumBuffers) 182 self->mBufferHead = 0; 183 184 *buffer = self->buffers[index].get(); 185 186 return 0; 187} 188 189int FramebufferNativeWindow::lockBuffer(android_native_window_t* window, 190 android_native_buffer_t* buffer) 191{ 192 FramebufferNativeWindow* self = getSelf(window); 193 Mutex::Autolock _l(self->mutex); 194 195 // wait that the buffer we're locking is not front anymore 196 while (self->front == buffer) { 197 self->mCondition.wait(self->mutex); 198 } 199 200 return NO_ERROR; 201} 202 203int FramebufferNativeWindow::queueBuffer(android_native_window_t* window, 204 android_native_buffer_t* buffer) 205{ 206 FramebufferNativeWindow* self = getSelf(window); 207 Mutex::Autolock _l(self->mutex); 208 framebuffer_device_t* fb = self->fbDev; 209 buffer_handle_t handle = static_cast<NativeBuffer*>(buffer)->handle; 210 int res = fb->post(fb, handle); 211 self->front = static_cast<NativeBuffer*>(buffer); 212 self->mNumFreeBuffers++; 213 self->mCondition.broadcast(); 214 return res; 215} 216 217int FramebufferNativeWindow::query(android_native_window_t* window, 218 int what, int* value) 219{ 220 FramebufferNativeWindow* self = getSelf(window); 221 Mutex::Autolock _l(self->mutex); 222 framebuffer_device_t* fb = self->fbDev; 223 switch (what) { 224 case NATIVE_WINDOW_WIDTH: 225 *value = fb->width; 226 return NO_ERROR; 227 case NATIVE_WINDOW_HEIGHT: 228 *value = fb->height; 229 return NO_ERROR; 230 case NATIVE_WINDOW_FORMAT: 231 *value = fb->format; 232 return NO_ERROR; 233 } 234 *value = 0; 235 return BAD_VALUE; 236} 237 238// ---------------------------------------------------------------------------- 239}; // namespace android 240// ---------------------------------------------------------------------------- 241 242using namespace android; 243 244EGLNativeWindowType android_createDisplaySurface(void) 245{ 246 FramebufferNativeWindow* w; 247 w = new FramebufferNativeWindow(); 248 if (w->getDevice() == NULL) { 249 // get a ref so it can be destroyed when we exit this block 250 sp<FramebufferNativeWindow> ref(w); 251 return NULL; 252 } 253 return (EGLNativeWindowType)w; 254} 255