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100 lines
3.4 KiB
C++
100 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 Oracle Corporation code.
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*
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* The Initial Developer of the Original Code is Oracle Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Stuart Parmenter <pavlov@pavlov.net>
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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 "gfxImageSurface.h"
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#include "cairo.h"
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gfxImageSurface::gfxImageSurface(const gfxIntSize& size, gfxImageFormat format) :
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mSize(size), mFormat(format)
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{
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long stride = ComputeStride();
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mData = new unsigned char[mSize.height * stride];
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mOwnsData = PR_TRUE;
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cairo_surface_t *surface =
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cairo_image_surface_create_for_data((unsigned char*)mData,
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(cairo_format_t)format,
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mSize.width,
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mSize.height,
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stride);
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mStride = stride;
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Init(surface);
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}
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gfxImageSurface::gfxImageSurface(cairo_surface_t *csurf)
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{
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mSize.width = cairo_image_surface_get_width(csurf);
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mSize.height = cairo_image_surface_get_height(csurf);
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mData = cairo_image_surface_get_data(csurf);
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mFormat = (gfxImageFormat) cairo_image_surface_get_format(csurf);
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mOwnsData = PR_FALSE;
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mStride = cairo_image_surface_get_stride(csurf);
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Init(csurf, PR_TRUE);
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}
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gfxImageSurface::~gfxImageSurface()
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{
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if (mOwnsData)
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delete[] mData;
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}
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long
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gfxImageSurface::ComputeStride() const
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{
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long stride;
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if (mFormat == ImageFormatARGB32)
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stride = mSize.width * 4;
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else if (mFormat == ImageFormatRGB24)
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stride = mSize.width * 4;
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else if (mFormat == ImageFormatA8)
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stride = mSize.width;
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else if (mFormat == ImageFormatA1) {
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stride = (mSize.width + 7) / 8;
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} else {
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NS_WARNING("Unknown format specified to gfxImageSurface!");
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stride = mSize.width * 4;
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}
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stride = ((stride + 3) / 4) * 4;
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return stride;
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}
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