blender/intern/cycles/render/tile.cpp

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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "tile.h"
#include "util_algorithm.h"
#include "util_types.h"
CCL_NAMESPACE_BEGIN
TileManager::TileManager(bool progressive_, int num_samples_, int2 tile_size_, int start_resolution_,
bool preserve_tile_device_, bool background_, TileOrder tile_order_, int num_devices_)
{
progressive = progressive_;
tile_size = tile_size_;
tile_order = tile_order_;
start_resolution = start_resolution_;
num_devices = num_devices_;
preserve_tile_device = preserve_tile_device_;
background = background_;
BufferParams buffer_params;
reset(buffer_params, 0);
}
TileManager::~TileManager()
{
}
void TileManager::reset(BufferParams& params_, int num_samples_)
{
params = params_;
int divider = 1;
int w = params.width, h = params.height;
if(start_resolution != INT_MAX) {
while(w*h > start_resolution*start_resolution) {
w = max(1, w/2);
h = max(1, h/2);
divider *= 2;
}
}
num_samples = num_samples_;
state.buffer = BufferParams();
state.sample = -1;
state.num_tiles = 0;
state.num_rendered_tiles = 0;
state.num_samples = 0;
state.resolution_divider = divider;
state.tiles.clear();
}
void TileManager::set_samples(int num_samples_)
{
num_samples = num_samples_;
}
/* splits image into tiles and assigns equal amount of tiles to every render device */
void TileManager::gen_tiles_global()
{
int resolution = state.resolution_divider;
int image_w = max(1, params.width/resolution);
int image_h = max(1, params.height/resolution);
state.tiles.clear();
int tile_w = (tile_size.x >= image_w)? 1: (image_w + tile_size.x - 1)/tile_size.x;
int tile_h = (tile_size.y >= image_h)? 1: (image_h + tile_size.y - 1)/tile_size.y;
int num_logical_devices = preserve_tile_device? num_devices: 1;
int num = min(image_h, num_logical_devices);
int tile_index = 0;
int tiles_per_device = (tile_w * tile_h + num - 1) / num;
int cur_device = 0, cur_tiles = 0;
for(int tile_y = 0; tile_y < tile_h; tile_y++) {
for(int tile_x = 0; tile_x < tile_w; tile_x++, tile_index++) {
int x = tile_x * tile_size.x;
int y = tile_y * tile_size.y;
int w = (tile_x == tile_w-1)? image_w - x: tile_size.x;
int h = (tile_y == tile_h-1)? image_h - y: tile_size.y;
state.tiles.push_back(Tile(tile_index, x, y, w, h, cur_device));
cur_tiles++;
if(cur_tiles == tiles_per_device) {
cur_tiles = 0;
cur_device++;
}
}
}
}
/* slices image into as much pieces as how many devices are rendering this image */
void TileManager::gen_tiles_sliced()
{
int resolution = state.resolution_divider;
int image_w = max(1, params.width/resolution);
int image_h = max(1, params.height/resolution);
state.tiles.clear();
int num_logical_devices = preserve_tile_device? num_devices: 1;
int num = min(image_h, num_logical_devices);
int tile_index = 0;
for(int device = 0; device < num; device++) {
int device_y = (image_h/num)*device;
int device_h = (device == num-1)? image_h - device*(image_h/num): image_h/num;
int tile_w = (tile_size.x >= image_w)? 1: (image_w + tile_size.x - 1)/tile_size.x;
int tile_h = (tile_size.y >= device_h)? 1: (device_h + tile_size.y - 1)/tile_size.y;
for(int tile_y = 0; tile_y < tile_h; tile_y++) {
for(int tile_x = 0; tile_x < tile_w; tile_x++, tile_index++) {
int x = tile_x * tile_size.x;
int y = tile_y * tile_size.y;
int w = (tile_x == tile_w-1)? image_w - x: tile_size.x;
int h = (tile_y == tile_h-1)? device_h - y: tile_size.y;
state.tiles.push_back(Tile(tile_index, x, y + device_y, w, h, device));
}
}
}
}
void TileManager::set_tiles()
{
int resolution = state.resolution_divider;
int image_w = max(1, params.width/resolution);
int image_h = max(1, params.height/resolution);
if(background)
gen_tiles_global();
else
gen_tiles_sliced();
state.num_tiles = state.tiles.size();
state.buffer.width = image_w;
state.buffer.height = image_h;
state.buffer.full_x = params.full_x/resolution;
state.buffer.full_y = params.full_y/resolution;
state.buffer.full_width = max(1, params.full_width/resolution);
state.buffer.full_height = max(1, params.full_height/resolution);
}
list<Tile>::iterator TileManager::next_viewport_tile(int device)
{
list<Tile>::iterator iter;
int logical_device = preserve_tile_device? device: 0;
for(iter = state.tiles.begin(); iter != state.tiles.end(); iter++) {
if(iter->device == logical_device && iter->rendering == false)
return iter;
}
return state.tiles.end();
}
list<Tile>::iterator TileManager::next_background_tile(int device, TileOrder tile_order)
{
list<Tile>::iterator iter, best = state.tiles.end();
int resolution = state.resolution_divider;
int logical_device = preserve_tile_device? device: 0;
int64_t cordx = max(1, params.width/resolution);
int64_t cordy = max(1, params.height/resolution);
int64_t mindist = INT_MAX;
int64_t centx = cordx / 2, centy = cordy / 2;
for(iter = state.tiles.begin(); iter != state.tiles.end(); iter++) {
if(iter->device == logical_device && iter->rendering == false) {
Tile &cur_tile = *iter;
int64_t distx = cordx;
int64_t disty = cordy;
switch (tile_order) {
case TILE_CENTER:
distx = centx - (cur_tile.x + (cur_tile.w / 2));
disty = centy - (cur_tile.y + (cur_tile.h / 2));
distx = (int64_t)sqrt((double)(distx * distx + disty * disty));
break;
case TILE_RIGHT_TO_LEFT:
distx = cordx - cur_tile.x;
break;
case TILE_LEFT_TO_RIGHT:
distx = cordx + cur_tile.x;
break;
case TILE_TOP_TO_BOTTOM:
distx = cordx - cur_tile.y;
break;
case TILE_BOTTOM_TO_TOP:
distx = cordx + cur_tile.y;
break;
default:
break;
}
if(distx < mindist) {
best = iter;
mindist = distx;
}
}
}
return best;
}
bool TileManager::next_tile(Tile& tile, int device)
{
list<Tile>::iterator tile_it;
if (background)
tile_it = next_background_tile(device, tile_order);
else
tile_it = next_viewport_tile(device);
if(tile_it != state.tiles.end()) {
tile_it->rendering = true;
tile = *tile_it;
state.num_rendered_tiles++;
return true;
}
return false;
}
bool TileManager::done()
{
return (state.sample+state.num_samples >= num_samples && state.resolution_divider == 1);
}
bool TileManager::next()
{
if(done())
return false;
if(progressive && state.resolution_divider > 1) {
state.sample = 0;
state.resolution_divider /= 2;
state.num_samples = 1;
set_tiles();
}
else {
state.sample++;
if(progressive)
state.num_samples = 1;
else
state.num_samples = num_samples;
state.resolution_divider = 1;
set_tiles();
}
return true;
}
CCL_NAMESPACE_END