[Scummvm-cvs-logs] SF.net SVN: scummvm:[52946] scummvm/trunk/engines/gob
drmccoy at users.sourceforge.net
drmccoy at users.sourceforge.net
Thu Sep 30 15:01:07 CEST 2010
Revision: 52946
http://scummvm.svn.sourceforge.net/scummvm/?rev=52946&view=rev
Author: drmccoy
Date: 2010-09-30 13:01:07 +0000 (Thu, 30 Sep 2010)
Log Message:
-----------
GOB: Add a new class Surface
This will be the new class managing all drawing, providing
depth-agnostic methods for all drawing operations, including 2
iterator-like classes, Pixel and ConstPixel.
Modified Paths:
--------------
scummvm/trunk/engines/gob/module.mk
Added Paths:
-----------
scummvm/trunk/engines/gob/surface.cpp
scummvm/trunk/engines/gob/surface.h
Modified: scummvm/trunk/engines/gob/module.mk
===================================================================
--- scummvm/trunk/engines/gob/module.mk 2010-09-30 13:00:30 UTC (rev 52945)
+++ scummvm/trunk/engines/gob/module.mk 2010-09-30 13:01:07 UTC (rev 52946)
@@ -49,6 +49,7 @@
scenery_v1.o \
scenery_v2.o \
script.o \
+ surface.o \
totfile.o \
util.o \
variables.o \
Added: scummvm/trunk/engines/gob/surface.cpp
===================================================================
--- scummvm/trunk/engines/gob/surface.cpp (rev 0)
+++ scummvm/trunk/engines/gob/surface.cpp 2010-09-30 13:01:07 UTC (rev 52946)
@@ -0,0 +1,578 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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 program 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 program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "gob/surface.h"
+
+#include "common/system.h"
+#include "common/util.h"
+#include "common/frac.h"
+
+#include "graphics/primitives.h"
+
+namespace Gob {
+
+static void plotPixel(int x, int y, int color, void *data) {
+ Surface *dest = (Surface *)data;
+
+ dest->putPixel(x, y, color);
+}
+
+
+Pixel::Pixel(byte *vidMem, uint8 bpp) : _vidMem(vidMem), _bpp(bpp) {
+ assert((_bpp == 1) || (_bpp == 2));
+}
+
+Pixel &Pixel::operator++() {
+ _vidMem += _bpp;
+ return *this;
+}
+
+Pixel Pixel::operator++(int x) {
+ Pixel p = *this;
+ ++(*this);
+ return p;
+}
+
+Pixel &Pixel::operator--() {
+ _vidMem -= _bpp;
+ return *this;
+}
+
+Pixel Pixel::operator--(int x) {
+ Pixel p = *this;
+ --(*this);
+ return p;
+}
+
+Pixel &Pixel::operator+=(int x) {
+ _vidMem += x * _bpp;
+ return *this;
+}
+
+Pixel &Pixel::operator-=(int x) {
+ _vidMem -= x * _bpp;
+ return *this;
+}
+
+uint32 Pixel::get() const {
+ if (_bpp == 1)
+ return *((byte *) _vidMem);
+ if (_bpp == 2)
+ return *((uint16 *) _vidMem);
+
+ return 0;
+}
+
+void Pixel::set(uint32 p) {
+ if (_bpp == 1)
+ *((byte *) _vidMem) = (byte) p;
+ if (_bpp == 2)
+ *((uint16 *) _vidMem) = (uint16) p;
+}
+
+
+ConstPixel::ConstPixel(const byte *vidMem, uint8 bpp) : _vidMem(vidMem), _bpp(bpp) {
+ assert((_bpp == 1) || (_bpp == 2));
+}
+
+ConstPixel &ConstPixel::operator++() {
+ _vidMem += _bpp;
+ return *this;
+}
+
+ConstPixel ConstPixel::operator++(int x) {
+ ConstPixel p = *this;
+ ++(*this);
+ return p;
+}
+
+ConstPixel &ConstPixel::operator--() {
+ _vidMem -= _bpp;
+ return *this;
+}
+
+ConstPixel ConstPixel::operator--(int x) {
+ ConstPixel p = *this;
+ --(*this);
+ return p;
+}
+
+ConstPixel &ConstPixel::operator+=(int x) {
+ _vidMem += x * _bpp;
+ return *this;
+}
+
+ConstPixel &ConstPixel::operator-=(int x) {
+ _vidMem -= x * _bpp;
+ return *this;
+}
+
+uint32 ConstPixel::get() const {
+ if (_bpp == 1)
+ return *((const byte *) _vidMem);
+ if (_bpp == 2)
+ return *((const uint16 *) _vidMem);
+
+ return 0;
+}
+
+
+Surface::Surface(uint16 width, uint16 height, uint8 bpp, byte *vidMem) :
+ _width(width), _height(height), _bpp(bpp), _vidMem(vidMem) {
+
+ assert((_width > 0) && (_height > 0));
+ assert((_bpp == 1) || (_bpp == 2));
+
+ if (!_vidMem) {
+ _vidMem = new byte[_bpp * _width * _height];
+ _ownVidMem = true;
+
+ memset(_vidMem, 0, _bpp * _width * _height);
+ } else
+ _ownVidMem = false;
+}
+
+Surface::~Surface() {
+ if (_ownVidMem)
+ delete[] _vidMem;
+}
+
+uint16 Surface::getWidth() const {
+ return _width;
+}
+
+uint16 Surface::getHeight() const {
+ return _height;
+}
+
+uint16 Surface::getBPP() const {
+ return _bpp;
+}
+
+void Surface::resize(uint16 width, uint16 height) {
+ assert((width > 0) && (height > 0));
+
+ if (_ownVidMem)
+ delete[] _vidMem;
+
+ _width = width;
+ _height = height;
+
+ _vidMem = new byte[_bpp * _width * _height];
+ _ownVidMem = true;
+
+ memset(_vidMem, 0, _bpp * _width * _height);
+}
+
+byte *Surface::getData(uint16 x, uint16 y) {
+ return _vidMem + (y * _width * _bpp) + (x * _bpp);
+}
+
+const byte *Surface::getData(uint16 x, uint16 y) const {
+ return _vidMem + (y * _width * _bpp) + (x * _bpp);
+}
+
+Pixel Surface::get(uint16 x, uint16 y) {
+ byte *vidMem = getData(x, y);
+
+ return Pixel(vidMem, _bpp);
+}
+
+ConstPixel Surface::get(uint16 x, uint16 y) const {
+ const byte *vidMem = getData(x, y);
+
+ return ConstPixel(vidMem, _bpp);
+}
+
+bool Surface::clipBlitRect(int16 &left, int16 &top, int16 &right, int16 &bottom, int16 &x, int16 &y,
+ uint16 dWidth, uint16 dHeight, uint16 sWidth, uint16 sHeight) {
+
+ if ((x >= dWidth) || (y >= dHeight))
+ // Nothing to do
+ return false;
+
+ // Just in case those are swapped
+ if (left > right)
+ SWAP(left, right);
+ if (top > bottom)
+ SWAP(top, bottom);
+
+ if ((left >= sWidth) || (top >= sHeight) || (right < 0) || (bottom < 0))
+ // Nothing to do
+ return false;
+
+ // Adjust from coordinates
+ if (left < 0) {
+ x -= left;
+ left = 0;
+ }
+ if (top < 0) {
+ y -= top;
+ top = 0;
+ }
+
+ // Adjust to coordinates
+ if (x < 0) {
+ left -= x;
+ x = 0;
+ }
+ if (y < 0) {
+ top -= y;
+ y = 0;
+ }
+
+ // Limit by source and destination dimensions
+ right = MIN<int32>(right , MIN<int32>(sWidth , dWidth - x + left) - 1);
+ bottom = MIN<int32>(bottom, MIN<int32>(sHeight, dHeight - y + top ) - 1);
+
+ if ((right < left) || (bottom < top))
+ // Nothing to do
+ return false;
+
+ // Clip to sane values
+ right = MAX<int16>(right , 0);
+ bottom = MAX<int16>(bottom, 0);
+
+ return true;
+}
+
+void Surface::blit(const Surface &from, int16 left, int16 top, int16 right, int16 bottom,
+ int16 x, int16 y, int16 transp) {
+
+ // Color depths have to fit
+ assert(_bpp == from._bpp);
+
+ // Clip
+ if (!clipBlitRect(left, top, right, bottom, x, y, _width, _height, from._width, from._height))
+ return;
+
+ // Area to actually copy
+ uint16 width = right - left + 1;
+ uint16 height = bottom - top + 1;
+
+ if ((width == 0) || (height == 0))
+ // Nothing to do
+ return;
+
+ // Pointers to the blit destination and source start points
+ byte *dst = getData(x , y);
+ const byte *src = from.getData(left, top);
+
+ if ((left == 0) && (_width == from._width) && (_width == width) && ((_bpp != 1) || (transp < 0))) {
+ // If these conditions are met, we can directly use memcpy
+
+ memcpy(dst, src, width * height * _bpp);
+ return;
+ }
+
+ if ((_bpp != 1) || (transp < 0)) {
+ // We don't have to look for transparency => we can use memcpy line-wise
+
+ while (height-- > 0) {
+ memcpy(dst, src, width * _bpp);
+
+ dst += _width * _bpp;
+ src += from._width * from._bpp;
+ }
+
+ return;
+ }
+
+ assert(_bpp == 1);
+
+ // Otherwise, we have to copy by pixel
+
+ while (height-- > 0) {
+ byte *dstRow = dst;
+ const byte *srcRow = src;
+
+ for (uint16 i = 0; i < width; i++, dstRow++, srcRow++)
+ if (*srcRow != transp)
+ *dstRow = *srcRow;
+
+ dst += _width;
+ src += from._width;
+ }
+}
+
+void Surface::blit(const Surface &from, int16 x, int16 y, int16 transp) {
+ blit(from, 0, 0, from._width - 1, from._height - 1, x, y, transp);
+}
+
+void Surface::blit(const Surface &from, int16 transp) {
+ blit(from, 0, 0, from._width - 1, from._height - 1, 0, 0, transp);
+}
+
+void Surface::blitScaled(const Surface &from, int16 left, int16 top, int16 right, int16 bottom,
+ int16 x, int16 y, Common::Rational scale, int16 transp) {
+
+ if (scale == 1) {
+ // Yeah, "scaled"
+
+ blit(from, left, top, right, bottom, x, y, transp);
+ return;
+ }
+
+ // Color depths have to fit
+ assert(_bpp == from._bpp);
+
+ uint16 dWidth = floor((_width / scale).toDouble());
+ uint16 dHeight = floor((_height / scale).toDouble());
+
+ // Clip
+ if (!clipBlitRect(left, top, right, bottom, x, y, dWidth, dHeight, from._width, from._height))
+ return;
+
+ // Area to actually copy
+ uint16 width = right - left + 1;
+ uint16 height = bottom - top + 1;
+
+ if ((width == 0) || (height == 0))
+ // Nothing to do
+ return;
+
+ width = MIN<int32>(floor((width * scale).toDouble()), _width);
+ height = MIN<int32>(floor((height * scale).toDouble()), _height);
+
+ // Pointers to the blit destination and source start points
+ byte *dst = getData(x , y);
+ const byte *src = from.getData(left, top);
+
+ frac_t step = scale.getInverse().toFrac();
+
+ frac_t posW = 0, posH = 0;
+ while (height-- > 0) {
+ byte *dstRow = dst;
+ const byte *srcRow = src;
+
+ posW = 0;
+
+ for (uint16 i = 0; i < width; i++, dstRow += _bpp) {
+ memcpy(dstRow, srcRow, _bpp);
+
+ posW += step;
+ while (posW >= ((frac_t) FRAC_ONE)) {
+ srcRow += from._bpp;
+ posW -= FRAC_ONE;
+ }
+ }
+
+ posH += step;
+ while (posH >= ((frac_t) FRAC_ONE)) {
+ src += from._width * from._bpp;
+ posH -= FRAC_ONE;
+ }
+
+ dst += _width * _bpp;
+ }
+
+}
+
+void Surface::blitScaled(const Surface &from, int16 x, int16 y, Common::Rational scale, int16 transp) {
+ blitScaled(from, 0, 0, from._width - 1, from._height - 1, x, y, scale, transp);
+}
+
+void Surface::blitScaled(const Surface &from, Common::Rational scale, int16 transp) {
+ blitScaled(from, 0, 0, from._width - 1, from._height - 1, 0, 0, scale, transp);
+}
+
+void Surface::fillRect(uint16 left, uint16 top, uint16 right, uint16 bottom, uint32 color) {
+ // Just in case those are swapped
+ if (left > right)
+ SWAP(left, right);
+ if (top > bottom)
+ SWAP(top, bottom);
+
+ if ((left >= _width) || (top >= _height))
+ // Nothing to do
+ return;
+
+ // Area to actually fill
+ uint16 width = CLIP<int32>(right - left + 1, 0, _width - left);
+ uint16 height = CLIP<int32>(bottom - top + 1, 0, _height - top);
+
+ if ((width == 0) || (height == 0))
+ // Nothing to do
+ return;
+
+ if ((left == 0) && (width == _width) && (_bpp == 1)) {
+ // We can directly use memset
+
+ byte *dst = getData(left, top);
+
+ memset(dst, (byte) color, width * height);
+ return;
+ }
+
+ if (_bpp == 1) {
+ // We can use memset line-wise
+
+ byte *dst = getData(left, top);
+
+ while (height-- > 0) {
+ memset(dst, (byte) color, width);
+ dst += _width;
+ }
+
+ return;
+ }
+
+ assert(_bpp == 2);
+
+ // Otherwise, we have to fill by pixel
+
+ Pixel p = get(left, top);
+ while (height-- > 0) {
+ for (uint16 i = 0; i < width; i++, ++p)
+ p.set(color);
+
+ p += _width - width;
+ }
+}
+
+void Surface::fill(uint32 color) {
+ if (_bpp == 1) {
+ // We can directly use memset
+
+ memset(_vidMem, (byte) color, _width * _height);
+ return;
+ }
+
+ fillRect(0, 0, _width - 1, _height - 1, color);
+}
+
+void Surface::clear() {
+ fill(0);
+}
+
+void Surface::putPixel(uint16 x, uint16 y, uint32 color) {
+ if ((x >= _width) || (y >= _height))
+ return;
+
+ get(x, y).set(color);
+}
+
+void Surface::drawLine(uint16 x0, uint16 y0, uint16 x1, uint16 y1, uint32 color) {
+ Graphics::drawLine(x0, y0, x1, y1, color, &plotPixel, this);
+}
+
+/*
+ * The original's version of the Bresenham Algorithm was a bit "unclean"
+ * and produced strange edges at 45, 135, 225 and 315 degrees, so using the
+ * version found in the Wikipedia article about the
+ * "Bresenham's line algorithm" instead
+ */
+void Surface::drawCircle(uint16 x0, uint16 y0, uint16 radius, uint32 color, int16 pattern) {
+ int16 f = 1 - radius;
+ int16 ddFx = 0;
+ int16 ddFy = -2 * radius;
+ int16 x = 0;
+ int16 y = radius;
+
+ if (pattern == 0) {
+ putPixel(x0, y0 + radius, color);
+ putPixel(x0, y0 - radius, color);
+ putPixel(x0 + radius, y0, color);
+ putPixel(x0 - radius, y0, color);
+ } else
+ warning("Surface::drawCircle - pattern %d", pattern);
+
+ while (x < y) {
+ if (f >= 0) {
+ y--;
+ ddFy += 2;
+ f += ddFy;
+ }
+ x++;
+ ddFx += 2;
+ f += ddFx + 1;
+
+ switch (pattern) {
+ case -1:
+ fillRect(x0 - y, y0 + x, x0 + y, y0 + x, color);
+ fillRect(x0 - x, y0 + y, x0 + x, y0 + y, color);
+ fillRect(x0 - y, y0 - x, x0 + y, y0 - x, color);
+ fillRect(x0 - x, y0 - y, x0 + x, y0 - y, color);
+ break;
+ case 0:
+ putPixel(x0 + x, y0 + y, color);
+ putPixel(x0 - x, y0 + y, color);
+ putPixel(x0 + x, y0 - y, color);
+ putPixel(x0 - x, y0 - y, color);
+ putPixel(x0 + y, y0 + x, color);
+ putPixel(x0 - y, y0 + x, color);
+ putPixel(x0 + y, y0 - x, color);
+ putPixel(x0 - y, y0 - x, color);
+ break;
+ default:
+ fillRect(x0 + y - pattern, y0 + x - pattern, x0 + y, y0 + x, color);
+ fillRect(x0 + x - pattern, y0 + y - pattern, x0 + x, y0 + y, color);
+ fillRect(x0 - y, y0 + x - pattern, x0 - y + pattern, y0 + x, color);
+ fillRect(x0 - x, y0 + y - pattern, x0 - x + pattern, y0 + y, color);
+ fillRect(x0 + y - pattern, y0 - x, x0 + y, y0 - x + pattern, color);
+ fillRect(x0 + x - pattern, y0 - y, x0 + x, y0 - y + pattern, color);
+ fillRect(x0 - y, y0 - x, x0 - y + pattern, y0 - x + pattern, color);
+ fillRect(x0 - x, y0 - y, x0 - x + pattern, y0 - y + pattern, color);
+ break;
+ }
+ }
+}
+
+void Surface::blitToScreen(uint16 left, uint16 top, uint16 right, uint16 bottom, uint16 x, uint16 y) const {
+ // Color depths have to fit
+ assert(g_system->getScreenFormat().bytesPerPixel == _bpp);
+
+ uint16 sWidth = g_system->getWidth();
+ uint16 sHeight = g_system->getHeight();
+
+ if ((x >= sWidth) || (y >= sHeight))
+ // Nothing to do
+ return;
+
+ // Just in case those are swapped
+ if (left > right)
+ SWAP(left, right);
+ if (top > bottom)
+ SWAP(top, bottom);
+
+ if ((left >= _width) || (top >= _height))
+ // Nothing to do
+ return;
+
+ // Area to actually copy
+ uint16 width = MAX<int32>(MIN<int32>(MIN<int32>(right - left + 1, _width - left), sWidth - x), 0);
+ uint16 height = MAX<int32>(MIN<int32>(MIN<int32>(bottom - top + 1, _height - top ), sHeight - y), 0);
+
+ if ((width == 0) || (height == 0))
+ // Nothing to do
+ return;
+
+ // Pointers to the blit destination and source start points
+ const byte *src = getData(left, top);
+
+ g_system->copyRectToScreen(src, _width * _bpp, x, y, width, height);
+}
+
+} // End of namespace Gob
Property changes on: scummvm/trunk/engines/gob/surface.cpp
___________________________________________________________________
Added: svn:mime-type
+ text/plain
Added: svn:keywords
+ Date Rev Author URL Id
Added: svn:eol-style
+ native
Added: scummvm/trunk/engines/gob/surface.h
===================================================================
--- scummvm/trunk/engines/gob/surface.h (rev 0)
+++ scummvm/trunk/engines/gob/surface.h 2010-09-30 13:01:07 UTC (rev 52946)
@@ -0,0 +1,131 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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 program 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 program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef GOB_SURFACE_H
+#define GOB_SURFACE_H
+
+#include "common/scummsys.h"
+#include "common/ptr.h"
+#include "common/rational.h"
+
+namespace Gob {
+
+/** An iterator over a surface's image data, automatically handles different color depths. */
+class Pixel {
+public:
+ Pixel(byte *vidMem, uint8 bpp);
+
+ Pixel &operator++();
+ Pixel operator++(int x);
+
+ Pixel &operator--();
+ Pixel operator--(int x);
+
+ Pixel &operator+=(int x);
+ Pixel &operator-=(int x);
+
+ uint32 get() const;
+ void set(uint32 p);
+
+private:
+ byte *_vidMem;
+ uint8 _bpp;
+};
+
+/** A const iterator over a surface's image data, automatically handles different color depths. */
+class ConstPixel {
+public:
+ ConstPixel(const byte *vidMem, uint8 bpp);
+
+ ConstPixel &operator++();
+ ConstPixel operator++(int x);
+
+ ConstPixel &operator--();
+ ConstPixel operator--(int x);
+
+ ConstPixel &operator+=(int x);
+ ConstPixel &operator-=(int x);
+
+ uint32 get() const;
+
+private:
+ const byte *_vidMem;
+ uint8 _bpp;
+};
+
+class Surface {
+public:
+ Surface(uint16 width, uint16 height, uint8 bpp, byte *vidMem = 0);
+ ~Surface();
+
+ uint16 getWidth () const;
+ uint16 getHeight() const;
+ uint16 getBPP () const;
+
+ byte *getData(uint16 x = 0, uint16 y = 0);
+ const byte *getData(uint16 x = 0, uint16 y = 0) const;
+
+ void resize(uint16 width, uint16 height);
+
+ Pixel get(uint16 x = 0, uint16 y = 0);
+ ConstPixel get(uint16 x = 0, uint16 y = 0) const;
+
+ void blit(const Surface &from, int16 left, int16 top, int16 right, int16 bottom,
+ int16 x, int16 y, int16 transp = -1);
+ void blit(const Surface &from, int16 x, int16 y, int16 transp = -1);
+ void blit(const Surface &from, int16 transp = -1);
+
+ void blitScaled(const Surface &from, int16 left, int16 top, int16 right, int16 bottom,
+ int16 x, int16 y, Common::Rational scale, int16 transp = -1);
+ void blitScaled(const Surface &from, int16 x, int16 y, Common::Rational scale, int16 transp = -1);
+ void blitScaled(const Surface &from, Common::Rational scale, int16 transp = -1);
+
+ void fillRect(uint16 left, uint16 top, uint16 right, uint16 bottom, uint32 color);
+ void fill(uint32 color);
+ void clear();
+
+ void putPixel(uint16 x, uint16 y, uint32 color);
+ void drawLine(uint16 x0, uint16 y0, uint16 x1, uint16 y1, uint32 color);
+ void drawCircle(uint16 x0, uint16 y0, uint16 radius, uint32 color, int16 pattern = 0);
+
+ void blitToScreen(uint16 left, uint16 top, uint16 right, uint16 bottom, uint16 x, uint16 y) const;
+
+private:
+ uint16 _width;
+ uint16 _height;
+ uint8 _bpp;
+
+ bool _ownVidMem;
+ byte *_vidMem;
+
+ static bool clipBlitRect(int16 &left, int16 &top, int16 &right, int16 &bottom, int16 &x, int16 &y,
+ uint16 dWidth, uint16 dHeight, uint16 sWidth, uint16 sHeight);
+};
+
+typedef Common::SharedPtr<Surface> SurfacePtr;
+
+} // End of namespace Gob
+
+#endif // GOB_SURFACE_H
Property changes on: scummvm/trunk/engines/gob/surface.h
___________________________________________________________________
Added: svn:mime-type
+ text/plain
Added: svn:keywords
+ Date Rev Author URL Id
Added: svn:eol-style
+ native
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