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#include <AK/MappedFile.h>
#include <LibDraw/GraphicsBitmap.h>
#include <LibDraw/PNGLoader.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/mman.h>
#include <unistd.h>
NonnullRefPtr<GraphicsBitmap> GraphicsBitmap::create(Format format, const Size& size)
{
return adopt(*new GraphicsBitmap(format, size, Purgeable::No));
}
NonnullRefPtr<GraphicsBitmap> GraphicsBitmap::create_purgeable(Format format, const Size& size)
{
return adopt(*new GraphicsBitmap(format, size, Purgeable::Yes));
}
GraphicsBitmap::GraphicsBitmap(Format format, const Size& size, Purgeable purgeable)
: m_size(size)
, m_pitch(round_up_to_power_of_two(size.width() * sizeof(RGBA32), 16))
, m_format(format)
, m_purgeable(purgeable == Purgeable::Yes)
{
if (format == Format::Indexed8)
m_palette = new RGBA32[256];
int map_flags = purgeable == Purgeable::Yes ? (MAP_PURGEABLE | MAP_PRIVATE) : (MAP_ANONYMOUS | MAP_PRIVATE);
m_data = (RGBA32*)mmap_with_name(nullptr, size_in_bytes(), PROT_READ | PROT_WRITE, map_flags, 0, 0, String::format("GraphicsBitmap [%dx%d]", width(), height()).characters());
ASSERT(m_data && m_data != (void*)-1);
m_needs_munmap = true;
}
NonnullRefPtr<GraphicsBitmap> GraphicsBitmap::create_wrapper(Format format, const Size& size, size_t pitch, RGBA32* data)
{
return adopt(*new GraphicsBitmap(format, size, pitch, data));
}
RefPtr<GraphicsBitmap> GraphicsBitmap::load_from_file(const StringView& path)
{
return load_png(path);
}
RefPtr<GraphicsBitmap> GraphicsBitmap::load_from_file(Format format, const StringView& path, const Size& size)
{
MappedFile mapped_file(path);
if (!mapped_file.is_valid())
return nullptr;
return adopt(*new GraphicsBitmap(format, size, move(mapped_file)));
}
GraphicsBitmap::GraphicsBitmap(Format format, const Size& size, size_t pitch, RGBA32* data)
: m_size(size)
, m_data(data)
, m_pitch(pitch)
, m_format(format)
{
if (format == Format::Indexed8)
m_palette = new RGBA32[256];
}
GraphicsBitmap::GraphicsBitmap(Format format, const Size& size, MappedFile&& mapped_file)
: m_size(size)
, m_data((RGBA32*)mapped_file.data())
, m_pitch(round_up_to_power_of_two(size.width() * sizeof(RGBA32), 16))
, m_format(format)
, m_mapped_file(move(mapped_file))
{
ASSERT(format != Format::Indexed8);
}
NonnullRefPtr<GraphicsBitmap> GraphicsBitmap::create_with_shared_buffer(Format format, NonnullRefPtr<SharedBuffer>&& shared_buffer, const Size& size)
{
return adopt(*new GraphicsBitmap(format, move(shared_buffer), size));
}
GraphicsBitmap::GraphicsBitmap(Format format, NonnullRefPtr<SharedBuffer>&& shared_buffer, const Size& size)
: m_size(size)
, m_data((RGBA32*)shared_buffer->data())
, m_pitch(round_up_to_power_of_two(size.width() * sizeof(RGBA32), 16))
, m_format(format)
, m_shared_buffer(move(shared_buffer))
{
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) {
int rc = munmap(m_data, size_in_bytes());
ASSERT(rc == 0);
}
m_data = nullptr;
delete[] m_palette;
}
void GraphicsBitmap::set_mmap_name(const StringView& name)
{
ASSERT(m_needs_munmap);
::set_mmap_name(m_data, size_in_bytes(), String(name).characters());
}
void GraphicsBitmap::fill(Color color)
{
ASSERT(m_format == GraphicsBitmap::Format::RGB32 || m_format == GraphicsBitmap::Format::RGBA32);
for (int y = 0; y < height(); ++y) {
auto* scanline = this->scanline(y);
fast_u32_fill(scanline, color.value(), width());
}
}
void GraphicsBitmap::set_volatile()
{
ASSERT(m_purgeable);
if (m_volatile)
return;
int rc = madvise(m_data, size_in_bytes(), MADV_SET_VOLATILE);
if (rc < 0) {
perror("madvise(MADV_SET_VOLATILE)");
ASSERT_NOT_REACHED();
}
m_volatile = true;
}
[[nodiscard]] bool GraphicsBitmap::set_nonvolatile()
{
ASSERT(m_purgeable);
if (!m_volatile)
return true;
int rc = madvise(m_data, size_in_bytes(), MADV_SET_NONVOLATILE);
if (rc < 0) {
perror("madvise(MADV_SET_NONVOLATILE)");
ASSERT_NOT_REACHED();
}
m_volatile = false;
return rc == 0;
}
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