2011-12-24 11:13:33 +04:00
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: sw=2 ts=8 et ft=cpp : */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at:
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Code.
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*
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* The Initial Developer of the Original Code is
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* The Mozilla Foundation
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Jones <jones.chris.g@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <fcntl.h>
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#include <linux/fb.h>
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#include <linux/kd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <vector>
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#include "android/log.h"
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#include "Framebuffer.h"
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2011-12-31 06:28:40 +04:00
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#include "gfxContext.h"
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2011-12-24 11:13:33 +04:00
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#include "gfxImageSurface.h"
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2011-12-31 06:28:40 +04:00
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#include "gfxUtils.h"
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2011-12-24 11:13:33 +04:00
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#include "mozilla/FileUtils.h"
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#include "nsTArray.h"
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#define LOG(args...) __android_log_print(ANDROID_LOG_INFO, "Gonk" , ## args)
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using namespace std;
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namespace mozilla {
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namespace Framebuffer {
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static int sFd = -1;
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static size_t sMappedSize;
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static struct fb_var_screeninfo sVi;
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static size_t sActiveBuffer;
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typedef vector<nsRefPtr<gfxImageSurface> > BufferVector;
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BufferVector* sBuffers;
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BufferVector& Buffers() { return *sBuffers; }
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bool
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SetGraphicsMode()
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{
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ScopedClose fd(open("/dev/tty0", O_RDWR | O_SYNC));
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2012-04-12 14:21:24 +04:00
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if (0 > fd.get()) {
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2011-12-24 11:13:33 +04:00
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// This is non-fatal; post-Cupcake kernels don't have tty0.
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LOG("No /dev/tty0?");
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2012-04-12 14:21:24 +04:00
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} else if (ioctl(fd.get(), KDSETMODE, (void*) KD_GRAPHICS)) {
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2011-12-24 11:13:33 +04:00
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LOG("Error setting graphics mode on /dev/tty0");
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return false;
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}
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return true;
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}
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bool
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Open(nsIntSize* aScreenSize)
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{
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if (0 <= sFd)
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return true;
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if (!SetGraphicsMode())
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return false;
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ScopedClose fd(open("/dev/graphics/fb0", O_RDWR));
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2012-04-12 14:21:24 +04:00
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if (0 > fd.get()) {
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2011-12-24 11:13:33 +04:00
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LOG("Error opening framebuffer device");
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return false;
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}
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struct fb_fix_screeninfo fi;
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2012-04-12 14:21:24 +04:00
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if (0 > ioctl(fd.get(), FBIOGET_FSCREENINFO, &fi)) {
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2011-12-24 11:13:33 +04:00
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LOG("Error getting fixed screeninfo");
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return false;
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}
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2012-04-12 14:21:24 +04:00
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if (0 > ioctl(fd.get(), FBIOGET_VSCREENINFO, &sVi)) {
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2011-12-24 11:13:33 +04:00
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LOG("Error getting variable screeninfo");
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return false;
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}
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sMappedSize = fi.smem_len;
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void* mem = mmap(0, sMappedSize, PROT_READ | PROT_WRITE, MAP_SHARED,
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2012-04-12 14:21:24 +04:00
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fd.rwget(), 0);
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2011-12-24 11:13:33 +04:00
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if (MAP_FAILED == mem) {
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LOG("Error mmap'ing framebuffer");
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return false;
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}
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2012-04-12 14:21:24 +04:00
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sFd = fd.get();
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fd.forget();
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2011-12-24 11:13:33 +04:00
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// The android porting doc requires a /dev/graphics/fb0 device
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// that's double buffered with r5g6b5 format. Hence the
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// hard-coded numbers here.
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gfxASurface::gfxImageFormat format = gfxASurface::ImageFormatRGB16_565;
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int bytesPerPixel = gfxASurface::BytePerPixelFromFormat(format);
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gfxIntSize size(sVi.xres, sVi.yres);
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long stride = size.width * bytesPerPixel;
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size_t numFrameBytes = stride * size.height;
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sBuffers = new BufferVector(2);
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unsigned char* data = static_cast<unsigned char*>(mem);
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for (size_t i = 0; i < 2; ++i, data += numFrameBytes) {
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memset(data, 0, numFrameBytes);
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Buffers()[i] = new gfxImageSurface(data, size, stride, format);
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}
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// Clear the framebuffer to a known state.
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2011-12-31 06:28:40 +04:00
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Present(nsIntRect());
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2011-12-24 11:13:33 +04:00
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*aScreenSize = size;
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return true;
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}
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2012-04-05 20:15:19 +04:00
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bool
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GetSize(nsIntSize *aScreenSize) {
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if (0 <= sFd)
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return true;
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ScopedClose fd(open("/dev/graphics/fb0", O_RDWR));
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2012-04-12 14:21:24 +04:00
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if (0 > fd.get()) {
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2012-04-05 20:15:19 +04:00
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LOG("Error opening framebuffer device");
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return false;
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}
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2012-04-12 14:21:24 +04:00
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if (0 > ioctl(fd.get(), FBIOGET_VSCREENINFO, &sVi)) {
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2012-04-05 20:15:19 +04:00
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LOG("Error getting variable screeninfo");
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return false;
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}
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*aScreenSize = gfxIntSize(sVi.xres, sVi.yres);
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return true;
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}
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2011-12-24 11:13:33 +04:00
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void
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Close()
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{
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if (0 > sFd)
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return;
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munmap(Buffers()[0]->Data(), sMappedSize);
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delete sBuffers;
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sBuffers = NULL;
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close(sFd);
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sFd = -1;
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}
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gfxASurface*
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BackBuffer()
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{
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return Buffers()[!sActiveBuffer];
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}
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2011-12-31 06:28:40 +04:00
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static gfxASurface*
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FrontBuffer()
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{
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return Buffers()[sActiveBuffer];
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}
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2011-12-24 11:13:33 +04:00
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void
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2011-12-31 06:28:40 +04:00
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Present(const nsIntRegion& aUpdated)
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2011-12-24 11:13:33 +04:00
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{
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sActiveBuffer = !sActiveBuffer;
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sVi.yres_virtual = sVi.yres * 2;
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sVi.yoffset = sActiveBuffer * sVi.yres;
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sVi.bits_per_pixel = 16;
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if (ioctl(sFd, FBIOPUT_VSCREENINFO, &sVi) < 0) {
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LOG("Error presenting front buffer");
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}
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2011-12-31 06:28:40 +04:00
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nsRefPtr<gfxContext> ctx = new gfxContext(BackBuffer());
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gfxUtils::PathFromRegion(ctx, aUpdated);
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ctx->Clip();
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ctx->SetSource(FrontBuffer());
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ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
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ctx->Paint(1.0);
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2011-12-24 11:13:33 +04:00
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}
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} // namespace Framebuffer
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} // namespace mozilla
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