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/* 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.
*/
/* This code is based on Nine Patch code by Matthew Leverton
taken from https://github.com/konforce/Allegro-Nine-Patch
Copyright (C) 2011 Matthew Leverton
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include "common/array.h"
#include "graphics/transparent_surface.h"
#include "graphics/nine_patch.h"
namespace Graphics {
NinePatchSide::~NinePatchSide() {
for (uint i = 0; i < _m.size(); i++)
delete _m[i];
_m.clear();
}
bool NinePatchSide::init(Graphics::TransparentSurface *bmp, bool vertical) {
const uint len = vertical ? bmp->h : bmp->w;
uint i;
int s, t, z;
_m.clear();
for (i = 1, s = -1, t = 0, z = -1; i < len; ++i) {
int zz;
uint8 r, g, b, a;
uint32 *color = vertical ? (uint32 *)bmp->getBasePtr(0, i) : (uint32 *)bmp->getBasePtr(i, 0);
bmp->format.colorToARGB(*color, a, r, g, b);
if (i == len - 1)
zz = -1;
else if (r == 0 && g == 0 && b == 0 && a == 255)
zz = 0;
else if (a == 0 || r + g + b + a == 255 * 4)
zz = 1;
else
return false;
if (z != zz) {
if (s != -1) {
NinePatchMark *mrk = new NinePatchMark;
mrk->offset = s;
mrk->length = i - s;
if (z == 0) {
mrk->ratio = 1;
t += mrk->length;
} else {
mrk->ratio = 0;
}
_m.push_back(mrk);
}
s = i;
z = zz;
}
}
_fix = len - 2 - t;
for (i = 0; i < _m.size(); ++i) {
if (_m[i]->ratio)
_m[i]->ratio = _m[i]->length / (float)t;
}
return true;
}
void NinePatchSide::calcOffsets(int len) {
uint i, j;
int dest_offset = 0;
int remaining_stretch = len - _fix;
for (i = 0, j = 0; i < _m.size(); ++i) {
_m[i]->dest_offset = dest_offset;
if (_m[i]->ratio == 0) {
_m[i]->dest_length = _m[i]->length;
} else {
_m[i]->dest_length = (len - _fix) * _m[i]->ratio;
remaining_stretch -= _m[i]->dest_length;
j = i;
}
dest_offset += _m[i]->dest_length;
}
if (remaining_stretch) {
_m[j]->dest_length += remaining_stretch;
if (j + 1 < _m.size())
_m[j + 1]->dest_offset += remaining_stretch;
}
}
NinePatchBitmap::NinePatchBitmap(Graphics::TransparentSurface *bmp, bool owns_bitmap) {
int i;
uint8 r, g, b, a;
_bmp = bmp;
_destroy_bmp = owns_bitmap;
_h._m.clear();
_v._m.clear();
_cached_dw = 0;
_cached_dh = 0;
_width = bmp->w - 2;
_height = bmp->h - 2;
if (_width <= 0 || _height <= 0)
goto bad_bitmap;
/* make sure all four corners are transparent */
#define _check_pixel(x, y) \
bmp->format.colorToARGB(*(uint32 *)bmp->getBasePtr(x, y), a, r, g, b); \
if (a != 0 && r + g + b + a != 4) goto bad_bitmap;
_check_pixel(0,0);
_check_pixel(bmp->w - 1, 0);
_check_pixel(0, bmp->h - 1);
_check_pixel(bmp->w - 1, bmp->h - 1);
#undef _check_pixel
_padding.top = _padding.right = _padding.bottom = _padding.left = -1;
i = 1;
while (i < bmp->w) {
bmp->format.colorToARGB(*(uint32 *)bmp->getBasePtr(i, bmp->h - 1), a, r, g, b);
if (r + g + b == 0 && a == 1) {
if (_padding.left == -1)
_padding.left = i - 1;
else if (_padding.right != -1)
goto bad_bitmap;
} else if (a == 0 || r + g + b + a == 4) {
if (_padding.left != -1 && _padding.right == -1)
_padding.right = bmp->w - i - 1;
}
++i;
}
i = 1;
while (i < bmp->h) {
bmp->format.colorToARGB(*(uint32 *)bmp->getBasePtr(bmp->w - 1, i), a, r, g, b);
if (r + g + b == 0 && a == 1) {
if (_padding.top == -1)
_padding.top = i - 1;
else if (_padding.bottom != -1)
goto bad_bitmap;
} else if (a == 0 || r + g + b + a == 4) {
if (_padding.top != -1 && _padding.bottom == -1)
_padding.bottom = bmp->h - i - 1;
}
++i;
}
if (!_h.init(bmp, false) || !_v.init(bmp, true)) {
bad_bitmap:
_h._m.clear();
_v._m.clear();
}
}
void NinePatchBitmap::blit(Graphics::Surface &target, int dx, int dy, int dw, int dh) {
/* don't draw bitmaps that are smaller than the fixed area */
if (dw < _h._fix || dh < _v._fix)
return;
/* if the bitmap is the same size as the origin, then draw it as-is */
if (dw == _width && dh == _height) {
Common::Rect r(1, 1, dw, dh);
_bmp->blit(target, dx, dy, Graphics::FLIP_NONE, &r);
return;
}
/* only recalculate the offsets if they have changed since the last draw */
if (_cached_dw != dw || _cached_dh != dh) {
_h.calcOffsets(dw);
_v.calcOffsets(dh);
_cached_dw = dw;
_cached_dh = dh;
}
/* draw each region */
for (uint i = 0; i < _v._m.size(); ++i) {
for (uint j = 0; j < _h._m.size(); ++j) {
Common::Rect r(_h._m[j]->offset, _v._m[i]->offset,
_h._m[j]->offset + _h._m[j]->length, _v._m[i]->offset + _v._m[i]->length);
_bmp->blit(target, dx + _h._m[j]->dest_offset, dy + _v._m[i]->dest_offset,
Graphics::FLIP_NONE, &r, TS_ARGB(255, 255, 255, 255),
_h._m[j]->dest_length, _v._m[i]->dest_length);
}
}
}
NinePatchBitmap::~NinePatchBitmap() {
if (_destroy_bmp)
delete _bmp;
}
} // end of namespace Graphics
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