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GraphicsBitmap: Use MappedFile.

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This commit is contained in:
Andreas Kling 2019-04-03 14:32:45 +02:00
parent c0009e3173
commit 5b296718d8
Notes: sideshowbarker 2024-07-19 14:50:22 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/5b296718d8b
2 changed files with 16 additions and 24 deletions
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36
SharedGraphics/GraphicsBitmap.cpp
View File

@ -1,5 +1,6 @@
#include <SharedGraphics/GraphicsBitmap.h>
#include <SharedGraphics/PNGLoader.h>
#include <AK/MappedFile.h>
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
@ -20,7 +21,6 @@ GraphicsBitmap::GraphicsBitmap(Format format, const Size& size)
m_data = (RGBA32*)mmap(nullptr, size_in_bytes, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
ASSERT(m_data && m_data != (void*)-1);
set_mmap_name(m_data, size_in_bytes, String::format("GraphicsBitmap [%dx%d]", width(), height()).characters());
m_mmaped = true;
}
Retained<GraphicsBitmap> GraphicsBitmap::create_wrapper(Format format, const Size& size, RGBA32* data)
@ -35,25 +35,10 @@ RetainPtr<GraphicsBitmap> GraphicsBitmap::load_from_file(const String& path)
RetainPtr<GraphicsBitmap> GraphicsBitmap::load_from_file(Format format, const String& path, const Size& size)
{
int fd = open(path.characters(), O_RDONLY, 0644);
if (fd < 0) {
dbgprintf("open(%s) got fd=%d, failed: %s\n", path.characters(), fd, strerror(errno));
perror("open");
MappedFile mapped_file(path);
if (!mapped_file.is_valid())
return nullptr;
}
auto* mapped_data = (RGBA32*)mmap(nullptr, size.area() * 4, PROT_READ, MAP_SHARED, fd, 0);
if (mapped_data == MAP_FAILED) {
int rc = close(fd);
ASSERT(rc == 0);
return nullptr;
}
int rc = close(fd);
ASSERT(rc == 0);
auto bitmap = create_wrapper(format, size, mapped_data);
bitmap->m_mmaped = true;
return bitmap;
return adopt(*new GraphicsBitmap(format, size, move(mapped_file)));
}
GraphicsBitmap::GraphicsBitmap(Format format, const Size& size, RGBA32* data)
@ -64,6 +49,15 @@ GraphicsBitmap::GraphicsBitmap(Format format, const Size& size, RGBA32* data)
{
}
GraphicsBitmap::GraphicsBitmap(Format format, const Size& size, MappedFile&& mapped_file)
: m_size(size)
, m_data((RGBA32*)mapped_file.pointer())
, m_pitch(size.width() * sizeof(RGBA32))
, m_format(format)
, m_mapped_file(move(mapped_file))
{
}
Retained<GraphicsBitmap> GraphicsBitmap::create_with_shared_buffer(Format format, Retained<SharedBuffer>&& shared_buffer, const Size& size)
{
return adopt(*new GraphicsBitmap(format, move(shared_buffer), size));
@ -80,10 +74,6 @@ GraphicsBitmap::GraphicsBitmap(Format format, Retained<SharedBuffer>&& shared_bu
GraphicsBitmap::~GraphicsBitmap()
{
if (m_mmaped) {
int rc = munmap(m_data, m_size.area() * 4);
ASSERT(rc == 0);
}
m_data = nullptr;
}

4
SharedGraphics/GraphicsBitmap.h
View File

@ -6,6 +6,7 @@
#include <AK/Retainable.h>
#include <AK/RetainPtr.h>
#include <AK/AKString.h>
#include <AK/MappedFile.h>
#include <SharedBuffer.h>
class GraphicsBitmap : public Retainable<GraphicsBitmap> {
@ -35,13 +36,14 @@ public:
private:
GraphicsBitmap(Format, const Size&);
GraphicsBitmap(Format, const Size&, RGBA32*);
GraphicsBitmap(Format, const Size&, MappedFile&&);
GraphicsBitmap(Format, Retained<SharedBuffer>&&, const Size&);
Size m_size;
RGBA32* m_data { nullptr };
size_t m_pitch { 0 };
Format m_format { Format::Invalid };
bool m_mmaped { false };
MappedFile m_mapped_file;
RetainPtr<SharedBuffer> m_shared_buffer;
};