Campbell Barton
c434782e3a
Use a shorter/simpler license convention, stops the header taking so much space. Follow the SPDX license specification: https://spdx.org/licenses - C/C++/objc/objc++ - Python - Shell Scripts - CMake, GNUmakefile While most of the source tree has been included - `./extern/` was left out. - `./intern/cycles` & `./intern/atomic` are also excluded because they use different header conventions. doc/license/SPDX-license-identifiers.txt has been added to list SPDX all used identifiers. See P2788 for the script that automated these edits. Reviewed By: brecht, mont29, sergey Ref D14069
64 lines
1.2 KiB
C++
64 lines
1.2 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2021 Blender Foundation. */
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/** \file
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* \ingroup draw_engine
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*/
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#pragma once
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#include "BKE_image.h"
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#include "BKE_image_partial_update.hh"
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struct PartialImageUpdater {
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struct PartialUpdateUser *user;
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const struct Image *image;
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/**
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* \brief Ensure that there is a partial update user for the given image.
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*/
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void ensure_image(const Image *new_image)
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{
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if (!is_valid(new_image)) {
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free();
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create(new_image);
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}
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}
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virtual ~PartialImageUpdater()
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{
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free();
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}
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private:
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/**
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* \brief check if the partial update user can still be used for the given image.
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*
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* When switching to a different image the partial update user should be recreated.
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*/
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bool is_valid(const Image *new_image) const
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{
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if (image != new_image) {
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return false;
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}
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return user != nullptr;
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}
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void create(const Image *new_image)
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{
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BLI_assert(user == nullptr);
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user = BKE_image_partial_update_create(new_image);
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image = new_image;
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}
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void free()
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{
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if (user != nullptr) {
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BKE_image_partial_update_free(user);
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user = nullptr;
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image = nullptr;
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}
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}
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};
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