58 lines
2.2 KiB
JavaScript
58 lines
2.2 KiB
JavaScript
"use strict";
|
|
/*
|
|
Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
|
|
|
|
This file is part of spice-html5.
|
|
|
|
spice-html5 is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
spice-html5 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 Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with spice-html5. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
** bitmap.js
|
|
** Handle SPICE_IMAGE_TYPE_BITMAP
|
|
**--------------------------------------------------------------------------*/
|
|
function convert_spice_bitmap_to_web(context, spice_bitmap)
|
|
{
|
|
var ret;
|
|
var offset, x, src_offset = 0, src_dec = 0;
|
|
var u8 = new Uint8Array(spice_bitmap.data);
|
|
if (spice_bitmap.format != SPICE_BITMAP_FMT_32BIT &&
|
|
spice_bitmap.format != SPICE_BITMAP_FMT_RGBA)
|
|
return undefined;
|
|
|
|
if (!(spice_bitmap.flags & SPICE_BITMAP_FLAGS_TOP_DOWN))
|
|
{
|
|
src_offset = (spice_bitmap.y - 1 ) * spice_bitmap.stride;
|
|
src_dec = 2 * spice_bitmap.stride;
|
|
}
|
|
|
|
ret = context.createImageData(spice_bitmap.x, spice_bitmap.y);
|
|
for (offset = 0; offset < (spice_bitmap.y * spice_bitmap.stride); src_offset -= src_dec)
|
|
for (x = 0; x < spice_bitmap.x; x++, offset += 4, src_offset += 4)
|
|
{
|
|
ret.data[offset + 0 ] = u8[src_offset + 2];
|
|
ret.data[offset + 1 ] = u8[src_offset + 1];
|
|
ret.data[offset + 2 ] = u8[src_offset + 0];
|
|
|
|
// FIXME - We effectively treat all images as having SPICE_IMAGE_FLAGS_HIGH_BITS_SET
|
|
if (spice_bitmap.format == SPICE_BITMAP_FMT_32BIT)
|
|
ret.data[offset + 3] = 255;
|
|
else
|
|
ret.data[offset + 3] = u8[src_offset];
|
|
}
|
|
|
|
return ret;
|
|
}
|