FramebufferNativeWindow.cpp revision a455793a8d068a06ae65e1e04170eb24851c0eb1
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 const_cast<uint32_t&>(android_native_window_t::flags) = fbDev->flags; 122 const_cast<float&>(android_native_window_t::xdpi) = fbDev->xdpi; 123 const_cast<float&>(android_native_window_t::ydpi) = fbDev->ydpi; 124 const_cast<int&>(android_native_window_t::minSwapInterval) = 125 fbDev->minSwapInterval; 126 const_cast<int&>(android_native_window_t::maxSwapInterval) = 127 fbDev->maxSwapInterval; 128 } else { 129 LOGE("Couldn't get gralloc module"); 130 } 131 132 android_native_window_t::setSwapInterval = setSwapInterval; 133 android_native_window_t::dequeueBuffer = dequeueBuffer; 134 android_native_window_t::lockBuffer = lockBuffer; 135 android_native_window_t::queueBuffer = queueBuffer; 136 android_native_window_t::query = query; 137 android_native_window_t::perform = perform; 138} 139 140FramebufferNativeWindow::~FramebufferNativeWindow() 141{ 142 if (grDev) { 143 if (buffers[0] != NULL) 144 grDev->free(grDev, buffers[0]->handle); 145 if (buffers[1] != NULL) 146 grDev->free(grDev, buffers[1]->handle); 147 gralloc_close(grDev); 148 } 149 150 if (fbDev) { 151 framebuffer_close(fbDev); 152 } 153} 154 155status_t FramebufferNativeWindow::setUpdateRectangle(const Rect& r) 156{ 157 if (!mUpdateOnDemand) { 158 return INVALID_OPERATION; 159 } 160 return fbDev->setUpdateRect(fbDev, r.left, r.top, r.width(), r.height()); 161} 162 163status_t FramebufferNativeWindow::compositionComplete() 164{ 165 if (fbDev->compositionComplete) { 166 return fbDev->compositionComplete(fbDev); 167 } 168 return INVALID_OPERATION; 169} 170 171int FramebufferNativeWindow::setSwapInterval( 172 android_native_window_t* window, int interval) 173{ 174 framebuffer_device_t* fb = getSelf(window)->fbDev; 175 return fb->setSwapInterval(fb, interval); 176} 177 178int FramebufferNativeWindow::dequeueBuffer(android_native_window_t* window, 179 android_native_buffer_t** buffer) 180{ 181 FramebufferNativeWindow* self = getSelf(window); 182 Mutex::Autolock _l(self->mutex); 183 framebuffer_device_t* fb = self->fbDev; 184 185 // wait for a free buffer 186 while (!self->mNumFreeBuffers) { 187 self->mCondition.wait(self->mutex); 188 } 189 // get this buffer 190 self->mNumFreeBuffers--; 191 int index = self->mBufferHead++; 192 if (self->mBufferHead >= self->mNumBuffers) 193 self->mBufferHead = 0; 194 195 *buffer = self->buffers[index].get(); 196 197 return 0; 198} 199 200int FramebufferNativeWindow::lockBuffer(android_native_window_t* window, 201 android_native_buffer_t* buffer) 202{ 203 FramebufferNativeWindow* self = getSelf(window); 204 Mutex::Autolock _l(self->mutex); 205 206 // wait that the buffer we're locking is not front anymore 207 while (self->front == buffer) { 208 self->mCondition.wait(self->mutex); 209 } 210 211 return NO_ERROR; 212} 213 214int FramebufferNativeWindow::queueBuffer(android_native_window_t* window, 215 android_native_buffer_t* buffer) 216{ 217 FramebufferNativeWindow* self = getSelf(window); 218 Mutex::Autolock _l(self->mutex); 219 framebuffer_device_t* fb = self->fbDev; 220 buffer_handle_t handle = static_cast<NativeBuffer*>(buffer)->handle; 221 int res = fb->post(fb, handle); 222 self->front = static_cast<NativeBuffer*>(buffer); 223 self->mNumFreeBuffers++; 224 self->mCondition.broadcast(); 225 return res; 226} 227 228int FramebufferNativeWindow::query(android_native_window_t* window, 229 int what, int* value) 230{ 231 FramebufferNativeWindow* self = getSelf(window); 232 Mutex::Autolock _l(self->mutex); 233 framebuffer_device_t* fb = self->fbDev; 234 switch (what) { 235 case NATIVE_WINDOW_WIDTH: 236 *value = fb->width; 237 return NO_ERROR; 238 case NATIVE_WINDOW_HEIGHT: 239 *value = fb->height; 240 return NO_ERROR; 241 case NATIVE_WINDOW_FORMAT: 242 *value = fb->format; 243 return NO_ERROR; 244 } 245 *value = 0; 246 return BAD_VALUE; 247} 248 249int FramebufferNativeWindow::perform(android_native_window_t* window, 250 int operation, ...) 251{ 252 switch (operation) { 253 case NATIVE_WINDOW_SET_USAGE: 254 break; 255 default: 256 return NAME_NOT_FOUND; 257 } 258 return NO_ERROR; 259} 260 261// ---------------------------------------------------------------------------- 262}; // namespace android 263// ---------------------------------------------------------------------------- 264 265using namespace android; 266 267EGLNativeWindowType android_createDisplaySurface(void) 268{ 269 FramebufferNativeWindow* w; 270 w = new FramebufferNativeWindow(); 271 if (w->getDevice() == NULL) { 272 // get a ref so it can be destroyed when we exit this block 273 sp<FramebufferNativeWindow> ref(w); 274 return NULL; 275 } 276 return (EGLNativeWindowType)w; 277} 278