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// Copyright 2022 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "FrameBufferShared.h"
#include "TileShared.h"
#ifdef __cplusplus
namespace ispc {
#endif // __cplusplus
// a SparseFrameBuffer stores a subset of the full framebuffer as Tiles
struct SparseFB
{
// superclass that we inherit from
FrameBuffer super;
// Number of tasks being used to render the image in x & y
vec2i numRenderTasks;
// The total number of tiles that the framebuffer is divided into
vec2i totalTiles;
uint32 numTiles;
// Image data for the tiles in this SparseFrameBuffer
Tile *tiles;
// accumulates every other sample, for variance estimation / stopping
vec4f *varianceBuffer;
// holds error per task region, for adaptive accumulation
float *taskRegionError;
// the dynamic loadbalancer accumulates not in the rendertask, but the owning
// rank accumulates the arriving tiles
bool accumulate;
#ifdef __cplusplus
SparseFB()
: numRenderTasks(0),
totalTiles(0),
numTiles(0),
tiles(nullptr),
varianceBuffer(nullptr),
taskRegionError(nullptr),
accumulate(false)
{
super.type = FRAMEBUFFER_TYPE_SPARSE;
}
};
} // namespace ispc
#else
};
#endif // __cplusplus
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