e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
65 lines
1.2 KiB
C++
65 lines
1.2 KiB
C++
/* SPDX-FileCopyrightText: 2021 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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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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PartialUpdateUser *user;
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const 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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