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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.
*
*/
#include "glk/picture.h"
#include "glk/glk.h"
#include "glk/raw_decoder.h"
#include "glk/screen.h"
#include "common/file.h"
#include "image/jpeg.h"
#include "image/png.h"
namespace Glk {
void Pictures::clear() {
for (uint idx = 0; idx < _store.size(); ++idx) {
if (_store[idx]._picture)
_store[idx]._picture->decrement();
if (_store[idx]._scaled)
_store[idx]._scaled->decrement();
}
_store.clear();
}
void Pictures::increment() {
++_refCount;
}
void Pictures::decrement() {
if (_refCount > 0 && --_refCount == 0)
clear();
}
PictureEntry *Pictures::search(uint id) {
Picture *pic;
for (uint idx = 0; idx < _store.size(); ++idx) {
pic = _store[idx]._picture;
if (pic && pic->_id == id)
return &_store[idx];
}
return nullptr;
}
void Pictures::storeOriginal(Picture *pic) {
PictureEntry newPic;
newPic._picture = pic;
_store.push_back(newPic);
}
void Pictures::storeScaled(Picture *pic) {
PictureEntry *entry = search(pic->_id);
if (!entry)
return;
delete entry->_scaled;
entry->_scaled = pic;
}
void Pictures::store(Picture *pic) {
if (!pic)
return;
if (!pic->_scaled)
storeOriginal(pic);
else
storeScaled(pic);
}
Picture *Pictures::retrieve(uint id, bool scaled) {
Picture *pic;
for (uint idx = 0; idx < _store.size(); ++idx) {
pic = scaled ? _store[idx]._scaled : _store[idx]._picture;
if (pic && pic->_id == id)
return pic;
}
return nullptr;
}
Picture *Pictures::load(uint32 id) {
::Image::PNGDecoder png;
::Image::JPEGDecoder jpg;
Graphics::Surface rectImg;
RawDecoder raw;
const Graphics::Surface *img;
const byte *palette = nullptr;
uint palCount = 0;
int transColor = -1;
Picture *pic;
// Check if the picture is already in the store
pic = retrieve(id, false);
if (pic)
return pic;
Common::File f;
if (f.open(Common::String::format("pic%u.png", id))) {
png.loadStream(f);
img = png.getSurface();
palette = png.getPalette();
palCount = png.getPaletteColorCount();
} else if (f.open(Common::String::format("pic%u.jpg", id))) {
jpg.setOutputPixelFormat(g_system->getScreenFormat());
jpg.loadStream(f);
img = jpg.getSurface();
} else if (f.open(Common::String::format("pic%u.raw", id))) {
raw.loadStream(f);
img = raw.getSurface();
palette = raw.getPalette();
palCount = raw.getPaletteColorCount();
transColor = raw.getTransparentColor();
} else if (f.open(Common::String::format("pic%u.rect", id))) {
rectImg.w = f.readUint16LE();
rectImg.h = f.readUint16LE();
img = &rectImg;
} else {
// No such picture
return nullptr;
}
pic = new Picture(img->w, img->h, g_system->getScreenFormat());
pic->_refCount = 1;
pic->_id = id;
pic->_scaled = false;
if (transColor != -1)
pic->clear(pic->getTransparentColor());
if (!img->getPixels()) {
// Area definition without any content
} else if (!palette) {
pic->blitFrom(*img);
} else {
uint pal[256];
for (uint idx = 0; idx < palCount; ++idx)
pal[idx] = pic->format.RGBToColor(palette[idx * 3],
palette[idx * 3 + 1], palette[idx * 3 + 2]);
const byte *srcP = (const byte *)img->getPixels();
byte *destP = (byte *)pic->getPixels();
for (int idx = 0; idx < img->w * img->h; ++idx, srcP++, destP += pic->format.bytesPerPixel) {
if ((int)*srcP != transColor) {
uint val = (*srcP >= palCount) ? 0 : pal[*srcP];
if (pic->format.bytesPerPixel == 2)
WRITE_LE_UINT16(destP, val);
else
WRITE_LE_UINT32(destP, val);
}
}
}
store(pic);
return pic;
}
Picture *Pictures::scale(Picture *src, size_t sx, size_t sy) {
// Check for the presence of an already scaled version of that size
Picture *dst = retrieve(src->_id, true);
if (dst && dst->w == sx && dst->h == sy)
return dst;
// Create a new picture of the destination size and rescale the source picture
dst = new Picture(sx, sy, src->format);
dst->_id = src->_id;
dst->_scaled = true;
dst->transBlitFrom(*src, src->getBounds(), dst->getBounds(), (uint)-1);
storeScaled(dst);
return dst;
}
/*--------------------------------------------------------------------------*/
Picture::Picture(int width, int height, const Graphics::PixelFormat &fmt) :
Graphics::ManagedSurface(width, height, fmt), _refCount(0), _id(0), _scaled(false) {
// Default transparent color chosen at random
_transColor = format.RGBToColor(0x77, 0x77, 0x77);
}
void Picture::increment() {
++_refCount;
}
void Picture::decrement() {
if (_refCount > 0 && --_refCount == 0) {
// No longer any references to this picture, so remove it
delete this;
}
}
void Picture::drawPicture(const Common::Point &destPos, const Common::Rect &box) {
Graphics::ManagedSurface s(*g_vm->_screen, box);
Common::Point pt(destPos.x - box.left, destPos.y - box.top);
s.transBlitFrom(*this, pt, _transColor);
}
} // End of namespace Glk
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