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Fix crash previewing Export Sprite Sheet in certain cases

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This commit is contained in:
David Capello 2019-10-23 20:15:09 -03:00
parent d6efddee92
commit 0a2d5e171b
1 changed files with 33 additions and 14 deletions
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47
src/app/commands/cmd_export_sprite_sheet.cpp
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@ -283,7 +283,7 @@ public:
, m_dataFilenameAskOverwrite(true)
, m_editor(nullptr)
, m_genTimer(100, nullptr)
, m_executeFromUI(0)
, m_executionID(0)
, m_filenameFormat(params.filenameFormat())
{
static_assert(
@ -405,7 +405,6 @@ public:
}
~ExportSpriteSheetWindow() {
ASSERT(m_executeFromUI == 0);
cancelGenTask();
if (m_spriteSheet) {
DocDestroyer destroyer(UIContext::instance(), m_spriteSheet.release(), 100);
@ -850,6 +849,8 @@ private:
return;
}
ASSERT(m_genTask == nullptr);
ExportSpriteSheetParams params;
updateParams(params);
@ -865,8 +866,22 @@ private:
void generateSpriteSheetOnBackground(const ExportSpriteSheetParams& params,
base::task_token& token) {
// Sometimes (more often on Linux) the back buffer is still being
// used by the new document after
// generateSpriteSheetOnBackground() and before
// openGeneratedSpriteSheet(). In this case the use counter is 3
// which means that 2 or more openGeneratedSpriteSheet() are
// queued in the laf-os events queue. In this case we just create
// a new back buffer and the old one will be discarded by
// openGeneratedSpriteSheet() when m_executionID != executionID.
if (m_backBuffer.use_count() > 2) {
auto ptr = std::make_shared<doc::ImageBuffer>();
m_backBuffer.swap(ptr);
}
m_exporter.setDocImageBuffer(m_backBuffer);
ASSERT(m_backBuffer.use_count() == 2);
auto context = UIContext::instance();
Doc* newDocument =
generate_sprite_sheet(
@ -881,19 +896,23 @@ private:
return;
}
++m_executeFromUI;
++m_executionID;
int executionID = m_executionID;
ui::execute_from_ui_thread(
[this, newDocument]{
openGeneratedSpriteSheet(newDocument);
[this, newDocument, executionID]{
openGeneratedSpriteSheet(newDocument, executionID);
});
}
void openGeneratedSpriteSheet(Doc* newDocument) {
--m_executeFromUI;
void openGeneratedSpriteSheet(Doc* newDocument, int executionID) {
auto context = UIContext::instance();
if (!isVisible()) {
if (!isVisible() ||
// Other openGeneratedSpriteSheet() is queued and we are the
// old one. IN this case the newDocument contains a back
// buffer (ImageBufferPtr) that will be discarded.
m_executionID != executionID) {
DocDestroyer destroyer(context, newDocument, 100);
destroyer.destroyDocument();
return;
@ -908,12 +927,12 @@ private:
// iteration we'll use the "m_backBuffer" to re-generate the
// sprite sheet (while the document being displayed in the Editor
// will use the m_frontBuffer).
std::swap(m_frontBuffer, m_backBuffer);
m_frontBuffer.swap(m_backBuffer);
if (!m_spriteSheet) {
m_spriteSheet.reset(newDocument);
m_spriteSheet->setContext(context);
m_spriteSheet->setInhibitBackup(true);
m_spriteSheet->setContext(context);
m_editor = context->getEditorFor(m_spriteSheet.get());
if (m_editor) {
@ -925,8 +944,8 @@ private:
// Replace old cel with the new one
auto spriteSheetLay = static_cast<LayerImage*>(m_spriteSheet->sprite()->root()->firstLayer());
auto newDocLay = static_cast<LayerImage*>(newDocument->sprite()->root()->firstLayer());
auto oldCel = m_spriteSheet->sprite()->firstLayer()->cel(0);
auto newCel = newDocument->sprite()->firstLayer()->cel(0);
Cel* oldCel = m_spriteSheet->sprite()->firstLayer()->cel(0);
Cel* newCel = newDocument->sprite()->firstLayer()->cel(0);
spriteSheetLay->removeCel(oldCel);
delete oldCel;
@ -978,7 +997,7 @@ private:
Editor* m_editor;
std::unique_ptr<Task> m_genTask;
ui::Timer m_genTimer;
int m_executeFromUI;
int m_executionID;
std::string m_filenameFormat;
std::string m_filenameFormatDefault;
};