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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright 2011-2014 Pierre Ossman for Cendio AB
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <stdlib.h>
#include <windows.h>
#include <FL/x.H>
#include <rfb/LogWriter.h>
#include <rfb/Exception.h>
#include "Win32PixelBuffer.h"
using namespace rfb;
static rfb::LogWriter vlog("Win32PixelBuffer");
Win32PixelBuffer::Win32PixelBuffer(int width, int height) :
PlatformPixelBuffer(rfb::PixelFormat(32, 24, false, true,
255, 255, 255, 16, 8, 0),
width, height, NULL),
bitmap(NULL)
{
BITMAPINFOHEADER bih;
memset(&bih, 0, sizeof(bih));
bih.biSize = sizeof(BITMAPINFOHEADER);
bih.biBitCount = getPF().bpp;
bih.biSizeImage = (getPF().bpp / 8) * width * height;
bih.biPlanes = 1;
bih.biWidth = width;
bih.biHeight = -height; // Negative to get top-down
bih.biCompression = BI_RGB;
bitmap = CreateDIBSection(NULL, (BITMAPINFO*)&bih,
DIB_RGB_COLORS, (void**)&data, NULL, 0);
if (!bitmap) {
int err = GetLastError();
throw rdr::SystemException("unable to create DIB section", err);
}
}
Win32PixelBuffer::~Win32PixelBuffer()
{
DeleteObject(bitmap);
}
void Win32PixelBuffer::draw(int src_x, int src_y, int x, int y, int w, int h)
{
HDC dc;
dc = CreateCompatibleDC(fl_gc);
if (!dc)
throw rdr::SystemException("CreateCompatibleDC failed", GetLastError());
if (!SelectObject(dc, bitmap))
throw rdr::SystemException("SelectObject failed", GetLastError());
if (!BitBlt(fl_gc, x, y, w, h, dc, src_x, src_y, SRCCOPY)) {
// If the desktop we're rendering to is inactive (like when the screen
// is locked or the UAC is active), then GDI calls will randomly fail.
// This is completely undocumented so we have no idea how best to deal
// with it. For now, we've only seen this error and for this function
// so only ignore this combination.
if (GetLastError() != ERROR_INVALID_HANDLE)
throw rdr::SystemException("BitBlt failed", GetLastError());
}
DeleteDC(dc);
}
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