eclair snapshot

libs/ui/FramebufferNativeWindow.cpp

@@ -0,0 +1,279 @@
+/* 
+**
+** Copyright 2007 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.
+*/
+
+#define LOG_TAG "FramebufferNativeWindow"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include <cutils/log.h>
+#include <cutils/atomic.h>
+#include <utils/threads.h>
+#include <utils/RefBase.h>
+
+#include <ui/SurfaceComposerClient.h>
+#include <ui/Rect.h>
+#include <ui/FramebufferNativeWindow.h>
+
+#include <EGL/egl.h>
+
+#include <pixelflinger/format.h>
+#include <pixelflinger/pixelflinger.h>
+
+#include <hardware/hardware.h>
+#include <hardware/gralloc.h>
+
+#include <private/ui/android_natives_priv.h>
+
+// ----------------------------------------------------------------------------
+namespace android {
+// ----------------------------------------------------------------------------
+
+class NativeBuffer 
+    : public EGLNativeBase<
+        android_native_buffer_t, 
+        NativeBuffer, 
+        LightRefBase<NativeBuffer> >
+{
+public:
+    NativeBuffer(int w, int h, int f, int u) : BASE() {
+        android_native_buffer_t::width  = w;
+        android_native_buffer_t::height = h;
+        android_native_buffer_t::format = f;
+        android_native_buffer_t::usage  = u;
+    }
+private:
+    friend class LightRefBase<NativeBuffer>;    
+    ~NativeBuffer() { }; // this class cannot be overloaded
+};
+
+
+/*
+ * This implements the (main) framebuffer management. This class is used
+ * mostly by SurfaceFlinger, but also by command line GL application.
+ * 
+ * In fact this is an implementation of android_native_window_t on top of
+ * the framebuffer.
+ * 
+ * Currently it is pretty simple, it manages only two buffers (the front and 
+ * back buffer).
+ * 
+ */
+
+FramebufferNativeWindow::FramebufferNativeWindow() 
+    : BASE(), fbDev(0), grDev(0), mUpdateOnDemand(false)
+{
+    hw_module_t const* module;
+    if (hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module) == 0) {
+        int stride;
+        int err;
+        err = framebuffer_open(module, &fbDev);
+        LOGE_IF(err, "couldn't open framebuffer HAL (%s)", strerror(-err));
+        
+        err = gralloc_open(module, &grDev);
+        LOGE_IF(err, "couldn't open gralloc HAL (%s)", strerror(-err));
+
+        // bail out if we can't initialize the modules
+        if (!fbDev || !grDev)
+            return;
+        
+        mUpdateOnDemand = (fbDev->setUpdateRect != 0);
+        
+        // initialize the buffer FIFO
+        mNumBuffers = 2;
+        mNumFreeBuffers = 2;
+        mBufferHead = mNumBuffers-1;
+        buffers[0] = new NativeBuffer(
+                fbDev->width, fbDev->height, fbDev->format, GRALLOC_USAGE_HW_FB);
+        buffers[1] = new NativeBuffer(
+                fbDev->width, fbDev->height, fbDev->format, GRALLOC_USAGE_HW_FB);
+        
+        err = grDev->alloc(grDev,
+                fbDev->width, fbDev->height, fbDev->format, 
+                GRALLOC_USAGE_HW_FB, &buffers[0]->handle, &buffers[0]->stride);
+
+        LOGE_IF(err, "fb buffer 0 allocation failed w=%d, h=%d, err=%s",
+                fbDev->width, fbDev->height, strerror(-err));
+
+        err = grDev->alloc(grDev,
+                fbDev->width, fbDev->height, fbDev->format, 
+                GRALLOC_USAGE_HW_FB, &buffers[1]->handle, &buffers[1]->stride);
+
+        LOGE_IF(err, "fb buffer 1 allocation failed w=%d, h=%d, err=%s",
+                fbDev->width, fbDev->height, strerror(-err));
+
+        LOGE("xDpi %d", fbDev->xdpi);
+        LOGE("yDpi %d", fbDev->ydpi);
+        const_cast<uint32_t&>(android_native_window_t::flags) = fbDev->flags; 
+        const_cast<float&>(android_native_window_t::xdpi) = fbDev->xdpi;
+        const_cast<float&>(android_native_window_t::ydpi) = fbDev->ydpi;
+        const_cast<int&>(android_native_window_t::minSwapInterval) = 
+            fbDev->minSwapInterval;
+        const_cast<int&>(android_native_window_t::maxSwapInterval) = 
+            fbDev->maxSwapInterval;
+    } else {
+        LOGE("Couldn't get gralloc module");
+    }
+
+    android_native_window_t::setSwapInterval = setSwapInterval;
+    android_native_window_t::dequeueBuffer = dequeueBuffer;
+    android_native_window_t::lockBuffer = lockBuffer;
+    android_native_window_t::queueBuffer = queueBuffer;
+    android_native_window_t::query = query;
+    android_native_window_t::perform = perform;
+}
+
+FramebufferNativeWindow::~FramebufferNativeWindow() 
+{
+    if (grDev) {
+        if (buffers[0] != NULL)
+            grDev->free(grDev, buffers[0]->handle);
+        if (buffers[1] != NULL)
+            grDev->free(grDev, buffers[1]->handle);
+        gralloc_close(grDev);
+    }
+
+    if (fbDev) {
+        framebuffer_close(fbDev);
+    }
+}
+
+status_t FramebufferNativeWindow::setUpdateRectangle(const Rect& r) 
+{
+    if (!mUpdateOnDemand) {
+        return INVALID_OPERATION;
+    }
+    return fbDev->setUpdateRect(fbDev, r.left, r.top, r.width(), r.height());
+}
+
+status_t FramebufferNativeWindow::compositionComplete()
+{
+    if (fbDev->compositionComplete) {
+        return fbDev->compositionComplete(fbDev);
+    }
+    return INVALID_OPERATION;
+}
+
+int FramebufferNativeWindow::setSwapInterval(
+        android_native_window_t* window, int interval) 
+{
+    framebuffer_device_t* fb = getSelf(window)->fbDev;
+    return fb->setSwapInterval(fb, interval);
+}
+
+int FramebufferNativeWindow::dequeueBuffer(android_native_window_t* window, 
+        android_native_buffer_t** buffer)
+{
+    FramebufferNativeWindow* self = getSelf(window);
+    Mutex::Autolock _l(self->mutex);
+    framebuffer_device_t* fb = self->fbDev;
+
+    // wait for a free buffer
+    while (!self->mNumFreeBuffers) {
+        self->mCondition.wait(self->mutex);
+    }
+    // get this buffer
+    self->mNumFreeBuffers--;
+    int index = self->mBufferHead++;
+    if (self->mBufferHead >= self->mNumBuffers)
+        self->mBufferHead = 0;
+
+    *buffer = self->buffers[index].get();
+
+    return 0;
+}
+
+int FramebufferNativeWindow::lockBuffer(android_native_window_t* window, 
+        android_native_buffer_t* buffer)
+{
+    FramebufferNativeWindow* self = getSelf(window);
+    Mutex::Autolock _l(self->mutex);
+
+    // wait that the buffer we're locking is not front anymore
+    while (self->front == buffer) {
+        self->mCondition.wait(self->mutex);
+    }
+
+    return NO_ERROR;
+}
+
+int FramebufferNativeWindow::queueBuffer(android_native_window_t* window, 
+        android_native_buffer_t* buffer)
+{
+    FramebufferNativeWindow* self = getSelf(window);
+    Mutex::Autolock _l(self->mutex);
+    framebuffer_device_t* fb = self->fbDev;
+    buffer_handle_t handle = static_cast<NativeBuffer*>(buffer)->handle;
+    int res = fb->post(fb, handle);
+    self->front = static_cast<NativeBuffer*>(buffer);
+    self->mNumFreeBuffers++;
+    self->mCondition.broadcast();
+    return res;
+}
+
+int FramebufferNativeWindow::query(android_native_window_t* window,
+        int what, int* value) 
+{
+    FramebufferNativeWindow* self = getSelf(window);
+    Mutex::Autolock _l(self->mutex);
+    framebuffer_device_t* fb = self->fbDev;
+    switch (what) {
+        case NATIVE_WINDOW_WIDTH:
+            *value = fb->width;
+            return NO_ERROR;
+        case NATIVE_WINDOW_HEIGHT:
+            *value = fb->height;
+            return NO_ERROR;
+        case NATIVE_WINDOW_FORMAT:
+            *value = fb->format;
+            return NO_ERROR;
+    }
+    *value = 0;
+    return BAD_VALUE;
+}
+
+int FramebufferNativeWindow::perform(android_native_window_t* window,
+        int operation, ...)
+{
+    switch (operation) {
+        case NATIVE_WINDOW_SET_USAGE:
+            break;
+        default:
+            return NAME_NOT_FOUND;
+    }
+    return NO_ERROR;
+}
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+// ----------------------------------------------------------------------------
+
+using namespace android;
+
+EGLNativeWindowType android_createDisplaySurface(void)
+{
+    FramebufferNativeWindow* w;
+    w = new FramebufferNativeWindow();
+    if (w->getDevice() == NULL) {
+        // get a ref so it can be destroyed when we exit this block
+        sp<FramebufferNativeWindow> ref(w);
+        return NULL;
+    }
+    return (EGLNativeWindowType)w;
+}