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LibDraw: Add GraphicsBitmap::to_shareable_bitmap()

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This function returns the bitmap itself if it's already backed by a
SharedBuffer object, otherwise it creates a shareable copy of itself
and returns that.
This commit is contained in:
Andreas Kling 2019-12-08 17:07:44 +01:00
parent a7f414bba7
commit 183ee5847c
Notes: sideshowbarker 2024-07-19 10:55:19 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/183ee5847c7
2 changed files with 18 additions and 2 deletions
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10
Libraries/LibDraw/GraphicsBitmap.cpp
View File

@ -77,6 +77,16 @@ GraphicsBitmap::GraphicsBitmap(Format format, NonnullRefPtr<SharedBuffer>&& shar
ASSERT(format != Format::Indexed8);
}
NonnullRefPtr<GraphicsBitmap> GraphicsBitmap::to_shareable_bitmap() const
{
if (m_shared_buffer)
return *this;
auto buffer = SharedBuffer::create_with_size(size_in_bytes());
auto bitmap = GraphicsBitmap::create_with_shared_buffer(m_format, *buffer, m_size);
memcpy(buffer->data(), scanline(0), size_in_bytes());
return bitmap;
}
GraphicsBitmap::~GraphicsBitmap()
{
if (m_needs_munmap) {

10
Libraries/LibDraw/GraphicsBitmap.h
View File

@ -3,10 +3,10 @@
#include "Color.h"
#include "Rect.h"
#include "Size.h"
#include <AK/String.h>
#include <AK/MappedFile.h>
#include <AK/RefCounted.h>
#include <AK/RefPtr.h>
#include <AK/String.h>
#include <AK/StringView.h>
#include <SharedBuffer.h>
@ -24,6 +24,9 @@ public:
static RefPtr<GraphicsBitmap> load_from_file(const StringView& path);
static RefPtr<GraphicsBitmap> load_from_file(Format, const StringView& path, const Size&);
static NonnullRefPtr<GraphicsBitmap> create_with_shared_buffer(Format, NonnullRefPtr<SharedBuffer>&&, const Size&);
NonnullRefPtr<GraphicsBitmap> to_shareable_bitmap() const;
~GraphicsBitmap();
RGBA32* scanline(int y);
@ -39,6 +42,9 @@ public:
size_t pitch() const { return m_pitch; }
int shared_buffer_id() const { return m_shared_buffer ? m_shared_buffer->shared_buffer_id() : -1; }
SharedBuffer* shared_buffer() { return m_shared_buffer.ptr(); }
const SharedBuffer* shared_buffer() const { return m_shared_buffer.ptr(); }
unsigned bpp() const
{
switch (m_format) {
@ -157,7 +163,7 @@ inline Color GraphicsBitmap::get_pixel(int x, int y) const
return get_pixel<Format::Indexed8>(x, y);
default:
ASSERT_NOT_REACHED();
return { };
return {};
}
}