forked from bartvdbraak/blender
626 lines
14 KiB
C++
626 lines
14 KiB
C++
/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <string.h>
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#include <limits.h>
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#include "buffers.h"
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#include "camera.h"
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#include "device.h"
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#include "scene.h"
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#include "session.h"
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#include "util_foreach.h"
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#include "util_function.h"
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#include "util_time.h"
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CCL_NAMESPACE_BEGIN
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Session::Session(const SessionParams& params_)
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: params(params_),
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tile_manager(params.progressive, params.samples, params.tile_size, params.min_size)
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{
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device_use_gl = ((params.device.type != DEVICE_CPU) && !params.background);
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device = Device::create(params.device, params.background, params.threads);
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buffers = new RenderBuffers(device);
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display = new DisplayBuffer(device);
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session_thread = NULL;
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scene = NULL;
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start_time = 0.0;
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reset_time = 0.0;
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preview_time = 0.0;
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paused_time = 0.0;
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sample = 0;
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delayed_reset.do_reset = false;
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delayed_reset.samples = 0;
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display_outdated = false;
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gpu_draw_ready = false;
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gpu_need_tonemap = false;
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pause = false;
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}
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Session::~Session()
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{
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if(session_thread) {
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progress.set_cancel("Exiting");
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gpu_need_tonemap = false;
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gpu_need_tonemap_cond.notify_all();
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{
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thread_scoped_lock pause_lock(pause_mutex);
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pause = false;
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}
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pause_cond.notify_all();
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wait();
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}
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if(params.output_path != "") {
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tonemap();
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progress.set_status("Writing Image", params.output_path);
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display->write(device, params.output_path);
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}
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delete buffers;
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delete display;
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delete scene;
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delete device;
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}
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void Session::start()
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{
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session_thread = new thread(function_bind(&Session::run, this));
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}
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bool Session::ready_to_reset()
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{
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double dt = time_dt() - reset_time;
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if(!display_outdated)
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return (dt > params.reset_timeout);
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else
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return (dt > params.cancel_timeout);
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}
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/* GPU Session */
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void Session::reset_gpu(BufferParams& buffer_params, int samples)
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{
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/* block for buffer acces and reset immediately. we can't do this
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in the thread, because we need to allocate an OpenGL buffer, and
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that only works in the main thread */
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thread_scoped_lock display_lock(display->mutex);
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thread_scoped_lock buffers_lock(buffers->mutex);
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display_outdated = true;
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reset_time = time_dt();
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reset_(buffer_params, samples);
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gpu_need_tonemap = false;
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gpu_need_tonemap_cond.notify_all();
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pause_cond.notify_all();
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}
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bool Session::draw_gpu(BufferParams& buffer_params)
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{
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/* block for buffer access */
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thread_scoped_lock display_lock(display->mutex);
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/* first check we already rendered something */
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if(gpu_draw_ready) {
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/* then verify the buffers have the expected size, so we don't
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draw previous results in a resized window */
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if(!buffer_params.modified(display->params)) {
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/* for CUDA we need to do tonemapping still, since we can
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only access GL buffers from the main thread */
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if(gpu_need_tonemap) {
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thread_scoped_lock buffers_lock(buffers->mutex);
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tonemap();
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gpu_need_tonemap = false;
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gpu_need_tonemap_cond.notify_all();
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}
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display->draw(device);
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if(display_outdated && (time_dt() - reset_time) > params.text_timeout)
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return false;
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return true;
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}
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}
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return false;
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}
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void Session::run_gpu()
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{
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start_time = time_dt();
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reset_time = time_dt();
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paused_time = 0.0;
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if(!params.background)
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progress.set_start_time(start_time - paused_time);
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while(!progress.get_cancel()) {
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/* advance to next tile */
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bool no_tiles = !tile_manager.next();
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if(params.background) {
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/* if no work left and in background mode, we can stop immediately */
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if(no_tiles) {
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progress.set_status("Finished");
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break;
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}
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}
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else {
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/* if in interactive mode, and we are either paused or done for now,
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wait for pause condition notify to wake up again */
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thread_scoped_lock pause_lock(pause_mutex);
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if(pause || no_tiles) {
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update_status_time(pause, no_tiles);
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while(1) {
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double pause_start = time_dt();
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pause_cond.wait(pause_lock);
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paused_time += time_dt() - pause_start;
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if(!params.background)
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progress.set_start_time(start_time - paused_time);
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update_status_time(pause, no_tiles);
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progress.set_update();
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if(!pause)
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break;
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}
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}
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if(progress.get_cancel())
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break;
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}
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if(!no_tiles) {
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/* update scene */
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update_scene();
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if(device->error_message() != "")
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progress.set_cancel(device->error_message());
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if(progress.get_cancel())
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break;
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}
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if(!no_tiles) {
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/* buffers mutex is locked entirely while rendering each
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sample, and released/reacquired on each iteration to allow
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reset and draw in between */
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thread_scoped_lock buffers_lock(buffers->mutex);
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/* update status and timing */
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update_status_time();
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/* path trace */
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foreach(Tile& tile, tile_manager.state.tiles) {
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path_trace(tile);
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device->task_wait();
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if(device->error_message() != "")
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progress.set_cancel(device->error_message());
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if(progress.get_cancel())
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break;
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}
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/* update status and timing */
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update_status_time();
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gpu_need_tonemap = true;
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gpu_draw_ready = true;
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progress.set_update();
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/* wait for tonemap */
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if(!params.background) {
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while(gpu_need_tonemap) {
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if(progress.get_cancel())
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break;
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gpu_need_tonemap_cond.wait(buffers_lock);
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}
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}
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if(device->error_message() != "")
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progress.set_cancel(device->error_message());
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if(progress.get_cancel())
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break;
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}
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}
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}
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/* CPU Session */
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void Session::reset_cpu(BufferParams& buffer_params, int samples)
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{
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thread_scoped_lock reset_lock(delayed_reset.mutex);
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display_outdated = true;
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reset_time = time_dt();
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delayed_reset.params = buffer_params;
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delayed_reset.samples = samples;
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delayed_reset.do_reset = true;
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device->task_cancel();
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pause_cond.notify_all();
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}
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bool Session::draw_cpu(BufferParams& buffer_params)
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{
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thread_scoped_lock display_lock(display->mutex);
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/* first check we already rendered something */
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if(display->draw_ready()) {
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/* then verify the buffers have the expected size, so we don't
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draw previous results in a resized window */
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if(!buffer_params.modified(display->params)) {
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display->draw(device);
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if(display_outdated && (time_dt() - reset_time) > params.text_timeout)
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return false;
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return true;
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}
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}
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return false;
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}
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void Session::run_cpu()
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{
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{
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/* reset once to start */
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thread_scoped_lock reset_lock(delayed_reset.mutex);
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thread_scoped_lock buffers_lock(buffers->mutex);
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thread_scoped_lock display_lock(display->mutex);
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reset_(delayed_reset.params, delayed_reset.samples);
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delayed_reset.do_reset = false;
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}
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while(!progress.get_cancel()) {
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/* advance to next tile */
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bool no_tiles = !tile_manager.next();
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bool need_tonemap = false;
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if(params.background) {
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/* if no work left and in background mode, we can stop immediately */
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if(no_tiles) {
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progress.set_status("Finished");
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break;
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}
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}
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else {
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/* if in interactive mode, and we are either paused or done for now,
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wait for pause condition notify to wake up again */
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thread_scoped_lock pause_lock(pause_mutex);
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if(pause || no_tiles) {
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update_status_time(pause, no_tiles);
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while(1) {
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double pause_start = time_dt();
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pause_cond.wait(pause_lock);
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paused_time += time_dt() - pause_start;
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if(!params.background)
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progress.set_start_time(start_time - paused_time);
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update_status_time(pause, no_tiles);
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progress.set_update();
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if(!pause)
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break;
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}
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}
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if(progress.get_cancel())
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break;
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}
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if(!no_tiles) {
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/* buffers mutex is locked entirely while rendering each
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sample, and released/reacquired on each iteration to allow
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reset and draw in between */
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thread_scoped_lock buffers_lock(buffers->mutex);
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/* update scene */
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update_scene();
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if(device->error_message() != "")
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progress.set_cancel(device->error_message());
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if(progress.get_cancel())
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break;
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/* update status and timing */
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update_status_time();
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/* path trace */
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foreach(Tile& tile, tile_manager.state.tiles)
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path_trace(tile);
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/* update status and timing */
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update_status_time();
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if(!params.background)
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need_tonemap = true;
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if(device->error_message() != "")
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progress.set_cancel(device->error_message());
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}
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device->task_wait();
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{
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thread_scoped_lock reset_lock(delayed_reset.mutex);
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thread_scoped_lock buffers_lock(buffers->mutex);
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thread_scoped_lock display_lock(display->mutex);
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if(delayed_reset.do_reset) {
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/* reset rendering if request from main thread */
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delayed_reset.do_reset = false;
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reset_(delayed_reset.params, delayed_reset.samples);
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}
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else if(need_tonemap) {
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/* tonemap only if we do not reset, we don't we don't
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want to show the result of an incomplete sample*/
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tonemap();
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}
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if(device->error_message() != "")
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progress.set_cancel(device->error_message());
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}
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progress.set_update();
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}
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}
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void Session::run()
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{
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/* load kernels */
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progress.set_status("Loading render kernels (may take a few minutes the first time)");
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if(!device->load_kernels(params.experimental)) {
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string message = device->error_message();
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if(message == "")
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message = "Failed loading render kernel, see console for errors";
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progress.set_status("Error", message);
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progress.set_update();
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return;
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}
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/* session thread loop */
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progress.set_status("Waiting for render to start");
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/* run */
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if(!progress.get_cancel()) {
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if(device_use_gl)
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run_gpu();
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else
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run_cpu();
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}
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/* progress update */
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if(progress.get_cancel())
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progress.set_status("Cancel", progress.get_cancel_message());
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else
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progress.set_update();
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}
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bool Session::draw(BufferParams& buffer_params)
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{
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if(device_use_gl)
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return draw_gpu(buffer_params);
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else
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return draw_cpu(buffer_params);
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}
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void Session::reset_(BufferParams& buffer_params, int samples)
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{
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if(buffer_params.modified(buffers->params)) {
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gpu_draw_ready = false;
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buffers->reset(device, buffer_params);
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display->reset(device, buffer_params);
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}
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tile_manager.reset(buffer_params, samples);
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start_time = time_dt();
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preview_time = 0.0;
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paused_time = 0.0;
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sample = 0;
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if(!params.background)
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progress.set_start_time(start_time - paused_time);
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}
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void Session::reset(BufferParams& buffer_params, int samples)
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{
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if(device_use_gl)
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reset_gpu(buffer_params, samples);
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else
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reset_cpu(buffer_params, samples);
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}
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void Session::set_samples(int samples)
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{
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if(samples != params.samples) {
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params.samples = samples;
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tile_manager.set_samples(samples);
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{
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thread_scoped_lock pause_lock(pause_mutex);
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}
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pause_cond.notify_all();
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}
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}
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void Session::set_pause(bool pause_)
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{
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bool notify = false;
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{
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thread_scoped_lock pause_lock(pause_mutex);
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if(pause != pause_) {
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pause = pause_;
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notify = true;
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}
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}
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if(notify)
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pause_cond.notify_all();
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}
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void Session::wait()
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{
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session_thread->join();
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delete session_thread;
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session_thread = NULL;
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}
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void Session::update_scene()
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{
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thread_scoped_lock scene_lock(scene->mutex);
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progress.set_status("Updating Scene");
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/* update camera if dimensions changed for progressive render. the camera
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knows nothing about progressive or cropped rendering, it just gets the
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image dimensions passed in */
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Camera *cam = scene->camera;
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int width = tile_manager.state.buffer.full_width;
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int height = tile_manager.state.buffer.full_height;
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if(width != cam->width || height != cam->height) {
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cam->width = width;
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cam->height = height;
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cam->tag_update();
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}
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/* update scene */
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if(scene->need_update())
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scene->device_update(device, progress);
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}
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void Session::update_status_time(bool show_pause, bool show_done)
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{
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int sample = tile_manager.state.sample;
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int resolution = tile_manager.state.resolution;
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/* update status */
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string status, substatus;
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if(!params.progressive)
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substatus = "Path Tracing";
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else if(params.samples == INT_MAX)
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substatus = string_printf("Path Tracing Sample %d", sample+1);
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else
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substatus = string_printf("Path Tracing Sample %d/%d", sample+1, params.samples);
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if(show_pause)
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status = "Paused";
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else if(show_done)
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status = "Done";
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else
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status = "Rendering";
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progress.set_status(status, substatus);
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/* update timing */
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if(preview_time == 0.0 && resolution == 1)
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preview_time = time_dt();
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double sample_time = (sample == 0)? 0.0: (time_dt() - preview_time - paused_time)/(sample);
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/* negative can happen when we pause a bit before rendering, can discard that */
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if(preview_time < 0.0) preview_time = 0.0;
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progress.set_sample(sample + 1, sample_time);
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}
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void Session::path_trace(Tile& tile)
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{
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/* add path trace task */
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DeviceTask task(DeviceTask::PATH_TRACE);
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task.x = tile_manager.state.buffer.full_x + tile.x;
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task.y = tile_manager.state.buffer.full_y + tile.y;
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task.w = tile.w;
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task.h = tile.h;
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task.buffer = buffers->buffer.device_pointer;
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task.rng_state = buffers->rng_state.device_pointer;
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task.sample = tile_manager.state.sample;
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task.resolution = tile_manager.state.resolution;
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tile_manager.state.buffer.get_offset_stride(task.offset, task.stride);
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device->task_add(task);
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}
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void Session::tonemap()
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{
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/* add tonemap task */
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DeviceTask task(DeviceTask::TONEMAP);
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task.x = tile_manager.state.buffer.full_x;
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task.y = tile_manager.state.buffer.full_y;
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|
task.w = tile_manager.state.buffer.width;
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task.h = tile_manager.state.buffer.height;
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task.rgba = display->rgba.device_pointer;
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task.buffer = buffers->buffer.device_pointer;
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task.sample = tile_manager.state.sample;
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|
task.resolution = tile_manager.state.resolution;
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|
tile_manager.state.buffer.get_offset_stride(task.offset, task.stride);
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|
|
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if(task.w > 0 && task.h > 0) {
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|
device->task_add(task);
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device->task_wait();
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|
|
|
/* set display to new size */
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|
display->draw_set(task.w, task.h);
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|
}
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|
|
|
display_outdated = false;
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|
}
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|
|
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CCL_NAMESPACE_END
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