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/*
* Copyright 2011, Blender Foundation.
*
* 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 "tile.h"
#include "util_algorithm.h"
CCL_NAMESPACE_BEGIN
TileManager::TileManager(bool progressive_, int passes_, int tile_size_, int min_size_)
{
progressive = progressive_;
passes = passes_;
tile_size = tile_size_;
min_size = min_size_;
reset(0, 0);
}
TileManager::~TileManager()
{
}
void TileManager::reset(int width_, int height_)
{
full_width = width_;
full_height = height_;
start_resolution = 1;
int w = width_, h = height_;
if(min_size != INT_MAX) {
while(w*h > min_size*min_size) {
w = max(1, w/2);
h = max(1, h/2);
start_resolution *= 2;
}
}
state.width = 0;
state.height = 0;
state.pass = -1;
state.resolution = start_resolution;
state.tiles.clear();
}
void TileManager::set_tiles()
{
int resolution = state.resolution;
int image_w = max(1, full_width/resolution);
int image_h = max(1, full_height/resolution);
int tile_w = (image_w + tile_size - 1)/tile_size;
int tile_h = (image_h + tile_size - 1)/tile_size;
int sub_w = image_w/tile_w;
int sub_h = image_h/tile_h;
state.tiles.clear();
for(int tile_y = 0; tile_y < tile_h; tile_y++) {
for(int tile_x = 0; tile_x < tile_w; tile_x++) {
int x = tile_x * sub_w;
int y = tile_y * sub_h;
int w = (tile_x == tile_w-1)? image_w - x: sub_w;
int h = (tile_y == tile_h-1)? image_h - y: sub_h;
state.tiles.push_back(Tile(x, y, w, h));
}
}
state.width = image_w;
state.height = image_h;
}
bool TileManager::done()
{
return (state.pass+1 >= passes);
}
bool TileManager::next()
{
if(done())
return false;
if(progressive && state.resolution > 1) {
state.pass = 0;
state.resolution /= 2;
set_tiles();
}
else {
state.pass++;
state.resolution = 1;
set_tiles();
}
return true;
}
CCL_NAMESPACE_END
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