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/*
* Copyright 2021 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.
*/
#pragma once
#include "util/math.h"
#include "util/string.h"
#include "util/types.h"
CCL_NAMESPACE_BEGIN
/* Output driver for reading render buffers.
*
* Host applications implement this interface for outputting render buffers for offline rendering.
* Drivers can be used to copy the buffers into the host application or write them directly to
* disk. This interface may also be used for interactive display, however the DisplayDriver is more
* efficient for that purpose.
*/
class OutputDriver {
public:
OutputDriver() = default;
virtual ~OutputDriver() = default;
class Tile {
public:
Tile(const int2 offset,
const int2 size,
const int2 full_size,
const string_view layer,
const string_view view)
: offset(offset), size(size), full_size(full_size), layer(layer), view(view)
{
}
virtual ~Tile() = default;
const int2 offset;
const int2 size;
const int2 full_size;
const string layer;
const string view;
virtual bool get_pass_pixels(const string_view pass_name,
const int num_channels,
float *pixels) const = 0;
virtual bool set_pass_pixels(const string_view pass_name,
const int num_channels,
const float *pixels) const = 0;
};
/* Write tile once it has finished rendering. */
virtual void write_render_tile(const Tile &tile) = 0;
/* Update tile while rendering is in progress. Return true if any update
* was performed. */
virtual bool update_render_tile(const Tile & /* tile */)
{
return false;
}
/* For baking, read render pass PASS_BAKE_PRIMITIVE and PASS_BAKE_DIFFERENTIAL
* to determine which shading points to use for baking at each pixel. Return
* true if any data was read. */
virtual bool read_render_tile(const Tile & /* tile */)
{
return false;
}
};
CCL_NAMESPACE_END
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