/*
* Dillo Widget
*
* Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "fltkcore.hh"
#include "../lout/msg.h"
#include "../lout/misc.hh"
#include <FL/fl_draw.H>
#define IMAGE_MAX_AREA (6000 * 6000)
namespace dw {
namespace fltk {
using namespace lout::container::typed;
FltkImgbuf::FltkImgbuf (Type type, int width, int height)
{
_MSG("FltkImgbuf: new root %p\n", this);
init (type, width, height, NULL);
}
FltkImgbuf::FltkImgbuf (Type type, int width, int height, FltkImgbuf *root)
{
_MSG("FltkImgbuf: new scaled %p, root is %p\n", this, root);
init (type, width, height, root);
}
void FltkImgbuf::init (Type type, int width, int height, FltkImgbuf *root)
{
this->root = root;
this->type = type;
this->width = width;
this->height = height;
// TODO: Maybe this is only for root buffers
switch (type) {
case RGBA: bpp = 4; break;
case RGB: bpp = 3; break;
default: bpp = 1; break;
}
_MSG("FltkImgbuf::init width=%d height=%d bpp=%d\n", width, height, bpp);
rawdata = new uchar[bpp * width * height];
// Set light-gray as interim background color.
memset(rawdata, 222, width*height*bpp);
refCount = 1;
deleteOnUnref = true;
copiedRows = new lout::misc::BitSet (height);
// The list is only used for root buffers.
if (isRoot())
scaledBuffers = new lout::container::typed::List <FltkImgbuf> (true);
else
scaledBuffers = NULL;
if (!isRoot()) {
// Scaling
for (int row = 0; row < root->height; row++) {
if (root->copiedRows->get (row))
scaleRow (row, root->rawdata + row*root->width*root->bpp);
}
}
}
FltkImgbuf::~FltkImgbuf ()
{
_MSG("~FltkImgbuf[%s %p] deleted\n", isRoot() ? "root":"scaled", this);
if (!isRoot())
root->detachScaledBuf (this);
delete[] rawdata;
delete copiedRows;
if (scaledBuffers)
delete scaledBuffers;
}
/**
* \brief This method is called for the root buffer, when a scaled buffer
* removed.
*/
void FltkImgbuf::detachScaledBuf (FltkImgbuf *scaledBuf)
{
scaledBuffers->detachRef (scaledBuf);
_MSG("FltkImgbuf[root %p]: scaled buffer %p is detached, %d left\n",
this, scaledBuf, scaledBuffers->size ());
if (refCount == 0 && scaledBuffers->isEmpty () && deleteOnUnref)
// If the root buffer is not used anymore, but this is the last scaled
// buffer.
// See also: FltkImgbuf::unref().
delete this;
}
void FltkImgbuf::setCMap (int *colors, int num_colors)
{
}
inline void FltkImgbuf::scaleRow (int row, const core::byte *data)
{
int sr1 = scaledY (row);
int sr2 = scaledY (row + 1);
for (int sr = sr1; sr < sr2; sr++) {
// Avoid multiple passes.
if (copiedRows->get(sr)) continue;
copiedRows->set (sr, true);
if (sr == sr1) {
for (int px = 0; px < root->width; px++) {
int px1 = px * width / root->width;
int px2 = (px+1) * width / root->width;
for (int sp = px1; sp < px2; sp++) {
memcpy(rawdata + (sr*width + sp)*bpp, data + px*bpp, bpp);
}
}
} else {
memcpy(rawdata + sr*width*bpp, rawdata + sr1*width*bpp, width*bpp);
}
}
}
void FltkImgbuf::copyRow (int row, const core::byte *data)
{
assert (isRoot());
// Flag the row done and copy its data.
copiedRows->set (row, true);
memcpy(rawdata + row * width * bpp, data, width * bpp);
// Update all the scaled buffers of this root image.
for (Iterator <FltkImgbuf> it = scaledBuffers->iterator(); it.hasNext(); ) {
FltkImgbuf *sb = it.getNext ();
sb->scaleRow(row, data);
}
}
void FltkImgbuf::newScan ()
{
if (isRoot()) {
for (Iterator<FltkImgbuf> it = scaledBuffers->iterator(); it.hasNext();){
FltkImgbuf *sb = it.getNext ();
sb->copiedRows->clear();
}
}
}
core::Imgbuf* FltkImgbuf::getScaledBuf (int width, int height)
{
if (!isRoot())
return root->getScaledBuf (width, height);
if (width == this->width && height == this->height) {
ref ();
return this;
}
for (Iterator <FltkImgbuf> it = scaledBuffers->iterator(); it.hasNext(); ) {
FltkImgbuf *sb = it.getNext ();
if (sb->width == width && sb->height == height) {
sb->ref ();
return sb;
}
}
/* Check for excessive image sizes which would cause crashes due to
* too big allocations for the image buffer.
* In this case we return a pointer to the unscaled image buffer.
*/
if (width <= 0 || height <= 0 ||
width > IMAGE_MAX_AREA / height) {
MSG("FltkImgbuf::getScaledBuf: suspicious image size request %d x %d\n",
width, height);
ref ();
return this;
}
/* This size is not yet used, so a new buffer has to be created. */
FltkImgbuf *sb = new FltkImgbuf (type, width, height, this);
scaledBuffers->append (sb);
return sb;
}
void FltkImgbuf::getRowArea (int row, dw::core::Rectangle *area)
{
// TODO: May have to be adjusted.
if (isRoot()) {
/* root buffer */
area->x = 0;
area->y = row;
area->width = width;
area->height = 1;
_MSG("::getRowArea: area x=%d y=%d width=%d height=%d\n",
area->x, area->y, area->width, area->height);
} else {
// scaled buffer
int sr1 = scaledY (row);
int sr2 = scaledY (row + 1);
area->x = 0;
area->y = sr1;
area->width = width;
area->height = sr2 - sr1;
_MSG("::getRowArea: area x=%d y=%d width=%d height=%d\n",
area->x, area->y, area->width, area->height);
}
}
int FltkImgbuf::getRootWidth ()
{
return root ? root->width : width;
}
int FltkImgbuf::getRootHeight ()
{
return root ? root->height : height;
}
void FltkImgbuf::ref ()
{
refCount++;
//if (root)
// MSG("FltkImgbuf[scaled %p, root is %p]: ref() => %d\n",
// this, root, refCount);
//else
// MSG("FltkImgbuf[root %p]: ref() => %d\n", this, refCount);
}
void FltkImgbuf::unref ()
{
//if (root)
// MSG("FltkImgbuf[scaled %p, root is %p]: ref() => %d\n",
// this, root, refCount - 1);
//else
// MSG("FltkImgbuf[root %p]: ref() => %d\n", this, refCount - 1);
if (--refCount == 0) {
if (isRoot ()) {
// Root buffer, it must be ensured that no scaled buffers are left.
// See also FltkImgbuf::detachScaledBuf().
if (scaledBuffers->isEmpty () && deleteOnUnref) {
delete this;
} else {
_MSG("FltkImgbuf[root %p]: not deleted. numScaled=%d\n",
this, scaledBuffers->size ());
}
} else
// Scaled buffer buffer, simply delete it.
delete this;
}
}
bool FltkImgbuf::lastReference ()
{
return refCount == 1 &&
(scaledBuffers == NULL || scaledBuffers->isEmpty ());
}
void FltkImgbuf::setDeleteOnUnref (bool deleteOnUnref)
{
assert (isRoot ());
this->deleteOnUnref = deleteOnUnref;
}
bool FltkImgbuf::isReferred ()
{
return refCount != 0 ||
(scaledBuffers != NULL && !scaledBuffers->isEmpty ());
}
int FltkImgbuf::scaledY(int ySrc)
{
// TODO: May have to be adjusted.
assert (root != NULL);
return ySrc * height / root->height;
}
void FltkImgbuf::draw (Fl_Widget *target, int xRoot, int yRoot,
int x, int y, int width, int height)
{
// TODO: Clarify the question, whether "target" is the current widget
// (and so has not to be passed at all).
_MSG("::draw: xRoot=%d x=%d yRoot=%d y=%d width=%d height=%d\n"
" this->width=%d this->height=%d\n",
xRoot, x, yRoot, y, width, height, this->width, this->height);
if (x > this->width || y > this->height) {
return;
}
if (x + width > this->width) {
width = this->width - x;
}
if (y + height > this->height) {
height = this->height - y;
}
fl_draw_image(rawdata+bpp*(y*this->width + x), xRoot + x, yRoot + y, width,
height, bpp, this->width * bpp);
}
} // namespace dw
} // namespace fltk