139 lines
3.6 KiB
C++
139 lines
3.6 KiB
C++
#include "GraphicsBitmap.h"
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#ifdef KERNEL
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#include <Kernel/Process.h>
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#include <Kernel/MemoryManager.h>
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#include <WindowServer/WSMessageLoop.h>
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#endif
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#ifdef USERLAND
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#include <sys/mman.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdio.h>
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#endif
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RetainPtr<GraphicsBitmap> GraphicsBitmap::create(const Size& size)
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{
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return adopt(*new GraphicsBitmap(size));
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}
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GraphicsBitmap::GraphicsBitmap(const Size& size)
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: m_size(size)
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, m_pitch(size.width() * sizeof(RGBA32))
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{
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#ifdef KERNEL
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Syscall::SC_mmap_params params;
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memset(¶ms, 0, sizeof(params));
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params.fd = 0;
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params.prot = PROT_READ | PROT_WRITE;
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params.flags = MAP_ANONYMOUS | MAP_PRIVATE;
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params.size = size.area() * sizeof(RGBA32);
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params.offset = 0;
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m_data = (RGBA32*)current->sys$mmap(¶ms);
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ASSERT(m_data && m_data != (void*)-1);
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m_mmaped = true;
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#endif
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}
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RetainPtr<GraphicsBitmap> GraphicsBitmap::create_wrapper(const Size& size, RGBA32* data)
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{
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return adopt(*new GraphicsBitmap(size, data));
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}
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RetainPtr<GraphicsBitmap> GraphicsBitmap::load_from_file(const String& path, const Size& size)
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{
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RGBA32* mapped_data = nullptr;
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#ifdef USERLAND
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int fd = open(path.characters(), O_RDONLY, 0644);
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if (fd < 0) {
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dbgprintf("open(%s) got fd=%d, failed: %s\n", path.characters(), fd, strerror(errno));
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perror("open");
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return nullptr;
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}
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mapped_data = (RGBA32*)mmap(nullptr, size.area() * 4, PROT_READ, MAP_SHARED, fd, 0);
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if (mapped_data == MAP_FAILED) {
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int rc = close(fd);
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ASSERT(rc == 0);
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return nullptr;
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}
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#else
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int error;
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auto descriptor = VFS::the().open(path, error, 0, 0, *VFS::the().root_inode());
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if (!descriptor) {
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kprintf("Failed to load GraphicsBitmap from file (%s)\n", path.characters());
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return nullptr;
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}
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auto* region = WSMessageLoop::the().server_process().allocate_file_backed_region(LinearAddress(), size.area() * 4, descriptor->inode(), ".rgb file", /*readable*/true, /*writable*/false);
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mapped_data = (RGBA32*)region->laddr().get();
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#endif
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#ifdef USERLAND
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int rc = close(fd);
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ASSERT(rc == 0);
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#endif
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auto bitmap = create_wrapper(size, mapped_data);
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#ifdef KERNEL
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bitmap->m_server_region = region;
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#else
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bitmap->m_mmaped = true;
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#endif
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return bitmap;
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}
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GraphicsBitmap::GraphicsBitmap(const Size& size, RGBA32* data)
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: m_size(size)
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, m_data(data)
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, m_pitch(size.width() * sizeof(RGBA32))
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{
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}
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RetainPtr<GraphicsBitmap> GraphicsBitmap::create_with_shared_buffer(int shared_buffer_id, const Size& size, RGBA32* data)
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{
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if (!data) {
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#ifdef KERNEL
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void* shared_buffer = current->sys$get_shared_buffer(shared_buffer_id);
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#else
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void* shared_buffer = get_shared_buffer(shared_buffer_id);
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#endif
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if (!shared_buffer || shared_buffer == (void*)-1)
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return nullptr;
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data = (RGBA32*)shared_buffer;
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}
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return adopt(*new GraphicsBitmap(shared_buffer_id, size, data));
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}
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GraphicsBitmap::GraphicsBitmap(int shared_buffer_id, const Size& size, RGBA32* data)
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: m_size(size)
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, m_data(data)
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, m_pitch(size.width() * sizeof(RGBA32))
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, m_shared_buffer_id(shared_buffer_id)
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{
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}
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GraphicsBitmap::~GraphicsBitmap()
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{
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if (m_mmaped) {
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#ifdef KERNEL
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int rc = current->sys$munmap(m_data, m_size.area() * 4);
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#else
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int rc = munmap(m_data, m_size.area() * 4);
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#endif
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ASSERT(rc == 0);
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}
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if (m_shared_buffer_id != -1) {
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int rc;
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#ifdef KERNEL
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rc = current->sys$release_shared_buffer(m_shared_buffer_id);
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#else
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rc = release_shared_buffer(m_shared_buffer_id);
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#endif
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ASSERT(rc == 0);
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}
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m_data = nullptr;
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}
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