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#include "GraphicsBitmap.h"
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
RetainPtr<GraphicsBitmap> GraphicsBitmap::create(Format format, const Size& size)
{
return adopt(*new GraphicsBitmap(format, size));
}
GraphicsBitmap::GraphicsBitmap(Format format, const Size& size)
: m_size(size)
, m_pitch(size.width() * sizeof(RGBA32))
, m_format(format)
{
size_t size_in_bytes = size.area() * sizeof(RGBA32);
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;
}
RetainPtr<GraphicsBitmap> GraphicsBitmap::create_wrapper(Format format, const Size& size, RGBA32* data)
{
return adopt(*new GraphicsBitmap(format, size, data));
}
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");
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;
}
GraphicsBitmap::GraphicsBitmap(Format format, const Size& size, RGBA32* data)
: m_size(size)
, m_data(data)
, m_pitch(size.width() * sizeof(RGBA32))
, m_format(format)
{
}
RetainPtr<GraphicsBitmap> GraphicsBitmap::create_with_shared_buffer(Format format, int shared_buffer_id, const Size& size, RGBA32* data)
{
if (!data) {
void* shared_buffer = get_shared_buffer(shared_buffer_id);
if (!shared_buffer || shared_buffer == (void*)-1)
return nullptr;
data = (RGBA32*)shared_buffer;
}
return adopt(*new GraphicsBitmap(format, shared_buffer_id, size, data));
}
GraphicsBitmap::GraphicsBitmap(Format format, int shared_buffer_id, const Size& size, RGBA32* data)
: m_size(size)
, m_data(data)
, m_pitch(size.width() * sizeof(RGBA32))
, m_format(format)
, m_shared_buffer_id(shared_buffer_id)
{
}
GraphicsBitmap::~GraphicsBitmap()
{
if (m_mmaped) {
int rc = munmap(m_data, m_size.area() * 4);
ASSERT(rc == 0);
}
if (m_shared_buffer_id != -1) {
int rc = release_shared_buffer(m_shared_buffer_id);
ASSERT(rc == 0);
}
m_data = nullptr;
}
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