0N/A/*
157N/A * Copyright (c) 2008, 2009, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
157N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
157N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
157N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
157N/A * or visit www.oracle.com if you need additional information or have any
157N/A * questions.
0N/A */
0N/A
0N/A#include "utility/rect.h"
0N/A
0N/A#if defined(__cplusplus)
0N/Aextern "C" {
0N/A#endif
0N/A
0N/A/**
0N/A * bitsPerPixel must be 32 for now.
0N/A * outBuf must be large enough to conatin all the rectangles.
0N/A */
0N/Aint BitmapToYXBandedRectangles(int bitsPerPixel, int width, int height, unsigned char * buf, RECT_T * outBuf)
0N/A{
0N/A //XXX: we might want to reuse the code in the splashscreen library,
0N/A // though we'd have to deal with the ALPHA_THRESHOLD and different
0N/A // image formats in this case.
0N/A int widthBytes = width * bitsPerPixel / 8;
0N/A int alignedWidth = (((widthBytes - 1) / 4) + 1) * 4;
0N/A
0N/A RECT_T * out = outBuf;
0N/A
0N/A RECT_T *pPrevLine = NULL, *pFirst = out, *pThis = pFirst;
0N/A int i, j, i0;
0N/A int length;
0N/A
0N/A for (j = 0; j < height; j++) {
0N/A /* generate data for a scanline */
0N/A
0N/A unsigned char *pSrc = (unsigned char *) buf + j * alignedWidth;
0N/A RECT_T *pLine = pThis;
0N/A
0N/A i = 0;
0N/A
0N/A do {
0N/A // pSrc[0,1,2] == B,G,R; pSrc[3] == Alpha
0N/A while (i < width && !pSrc[3]) {
0N/A pSrc += 4;
0N/A ++i;
0N/A }
0N/A if (i >= width)
0N/A break;
0N/A i0 = i;
0N/A while (i < width && pSrc[3]) {
0N/A pSrc += 4;
0N/A ++i;
0N/A }
0N/A RECT_SET(*pThis, i0, j, i - i0, 1);
0N/A ++pThis;
0N/A } while (i < width);
0N/A
0N/A /* check if the previous scanline is exactly the same, merge if so
0N/A (this is the only optimization we can use for YXBanded rectangles,
0N/A and win32 supports YXBanded only */
0N/A
0N/A length = pThis - pLine;
0N/A if (pPrevLine && pLine - pPrevLine == length) {
0N/A for (i = 0; i < length && RECT_EQ_X(pPrevLine[i], pLine[i]); ++i) {
0N/A }
0N/A if (i == pLine - pPrevLine) {
0N/A // do merge
0N/A for (i = 0; i < length; i++) {
0N/A RECT_INC_HEIGHT(pPrevLine[i]);
0N/A }
0N/A pThis = pLine;
0N/A continue;
0N/A }
0N/A }
0N/A /* or else use the generated scanline */
0N/A
0N/A pPrevLine = pLine;
0N/A }
0N/A
0N/A return pThis - pFirst;
0N/A}
0N/A
0N/A#if defined(__cplusplus)
0N/A}
0N/A#endif
0N/A