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static/plugins/spice-html5/bitmap.js
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"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; var u8 = new Uint8Array(spice_bitmap.data); if (spice_bitmap.format != SPICE_BITMAP_FMT_32BIT && spice_bitmap.format != SPICE_BITMAP_FMT_RGBA) return undefined; ret = context.createImageData(spice_bitmap.x, spice_bitmap.y); for (offset = 0; offset < (spice_bitmap.y * spice_bitmap.stride); ) for (x = 0; x < spice_bitmap.x; x++, offset += 4) { ret.data[offset + 0 ] = u8[offset + 2]; ret.data[offset + 1 ] = u8[offset + 1]; ret.data[offset + 2 ] = u8[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[offset]; } return ret; } |